UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-CSR CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES Investment Company Act file number 811-4777 - ------------------------------------------------------------------------------- MFS SERIES TRUST I - ------------------------------------------------------------------------------- (Exact name of registrant as specified in charter) 500 Boylston Street, Boston, Massachusetts 02116 - ------------------------------------------------------------------------------- (Address of principal executive offices) (Zip code) Susan S. Newton Massachusetts Financial Services Company 500 Boylston Street Boston, Massachusetts 02116 - ------------------------------------------------------------------------------- (Name and address of agents for service) Registrant's telephone number, including area code: (617) 954-5000 - ------------------------------------------------------------------------------- Date of fiscal year end: August 31 - ------------------------------------------------------------------------------- Date of reporting period: August 31, 2006 - ------------------------------------------------------------------------------- ITEM 1. REPORTS TO STOCKHOLDERS. M F S(R) INVESTMENT MANAGEMENT [graphic omitted] ANNUAL REPORT KEEPING YOU INFORMED MFS wants to ensure that you are consistently updated about your investments with us. This shareholder report will not only show how your investment performed during the time period, but will also provide you with informative commentary from the portfolio management team. They will offer an overview of market conditions and will also discuss the specific factors that may have enhanced or detracted from your investment's performance. MFS(R) TECHNOLOGY FUND LETTER FROM THE CEO 1 - ------------------------------------------------------------------ PORTFOLIO COMPOSITION 2 - ------------------------------------------------------------------ MANAGEMENT REVIEW 3 - ------------------------------------------------------------------ PERFORMANCE SUMMARY 5 - ------------------------------------------------------------------ EXPENSE TABLE 8 - ------------------------------------------------------------------ PORTFOLIO OF INVESTMENTS 10 - ------------------------------------------------------------------ STATEMENT OF ASSETS AND LIABILITIES 12 - ------------------------------------------------------------------ STATEMENT OF OPERATIONS 14 - ------------------------------------------------------------------ STATEMENTS OF CHANGES IN NET ASSETS 15 - ------------------------------------------------------------------ FINANCIAL HIGHLIGHTS 16 - ------------------------------------------------------------------ NOTES TO FINANCIAL STATEMENTS 22 - ------------------------------------------------------------------ REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM 32 - ------------------------------------------------------------------ RESULTS OF SHAREHOLDER MEETING 33 - ------------------------------------------------------------------ TRUSTEES AND OFFICERS 34 - ------------------------------------------------------------------ BOARD REVIEW OF INVESTMENT ADVISORY AGREEMENT 40 - ------------------------------------------------------------------ PROXY VOTING POLICIES AND INFORMATION 45 - ------------------------------------------------------------------ QUARTERLY PORTFOLIO DISCLOSURE 45 - ------------------------------------------------------------------ FEDERAL TAX INFORMATION 45 - ------------------------------------------------------------------ MFS(R) PRIVACY NOTICE 46 - ------------------------------------------------------------------ CONTACT INFORMATION BACK COVER - ------------------------------------------------------------------ Fund objective: Seeks capital appreciation. THE REPORT IS PREPARED FOR THE GENERAL INFORMATION OF SHAREHOLDERS. IT IS AUTHORIZED FOR DISTRIBUTION TO PROSPECTIVE INVESTORS ONLY WHEN PRECEDED OR ACCOMPANIED BY A CURRENT PROSPECTUS. - ------------------------------------------------------------------------------- NOT FDIC INSURED o MAY LOSE VALUE o NO BANK OR CREDIT UNION GUARANTEE o NOT A DEPOSIT o NOT INSURED BY ANY FEDERAL GOVERNMENT AGENCY OR NCUA/NCUSIF - ------------------------------------------------------------------------------- 8/31/06 SCT-ANN LETTER FROM THE CEO [Photo of Robert J. Manning] Dear Shareholders: The story is as old as the tortoise and the hare, but we believe it is still relevant today -- "slow and steady" is the way to go when it comes to investing. While financial markets will naturally ebb and flow over time, investors who remain committed to a long-term investment strategy are more likely to achieve their goals than those who consistently chase short-term performance. The first half of 2006 brought a high degree of fluctuation in markets around the globe as varying economic factors pulled markets in opposite directions. The global economy, for example, continued to grow at its fastest pace in three decades -- spurred by increased international trade, good job growth, and wage increases. At the same time, central banks around the world raised interest rates in sync in a collaborative attempt to curb inflation. While this was a positive development in some regions, in other cases, economic and market gains were tempered. What does all of this mean to you as an investor? If you're focused on the long term, these global developments become part of a longer cycle instead of one-time events that can have a significant impact on your portfolio. At MFS(R), our investment management process -- honed over 80 years -- combines a unique teamwork approach with an unwavering focus on helping you realize your long-term financial goals. We believe in a three-pronged investment strategy: o ALLOCATE holdings across the major asset classes -- including stocks, bonds, and cash. o DIVERSIFY within each class to take advantage of different market segments and investing styles. o REBALANCE assets regularly to maintain a desired asset allocation. Of course, these strategies cannot guarantee a profit or protect against a loss. Investing and planning for the long term requires diligence and patience, two traits that in our experience are essential to capitalizing on the many opportunities the financial markets can offer -- through both up and down economic cycles. Respectfully, /s/ Robert J. Manning Robert J. Manning Chief Executive Officer and Chief Investment Officer MFS Investment Management(R) October 13, 2006 The opinions expressed in this letter are subject to change, may not be relied upon for investment advice, and no forecasts can be guaranteed. PORTFOLIO COMPOSITION PORTFOLIO STRUCTURE Common Stocks 98.4% Cash & Other Net Assets 1.6% TOP TEN HOLDINGS Cisco Systems, Inc. 6.2% ------------------------------------------------ SanDisk Corp. 5.3% ------------------------------------------------ Intel Corp. 4.7% ------------------------------------------------ TIBCO Software, Inc. 4.4% ------------------------------------------------ Marvell Technology Group Ltd. 3.9% ------------------------------------------------ Salesforce.com, Inc. 3.8% ------------------------------------------------ Nortel Networks Corp. 3.2% ------------------------------------------------ Juniper Networks, Inc. 3.0% ------------------------------------------------ First Data Corp. 2.9% ------------------------------------------------ Hewlett-Packard Co. 2.7% ------------------------------------------------ TOP FIVE INDUSTRIES Electronics 24.3% ------------------------------------------------ Computer Software 24.0% ------------------------------------------------ Network & Telecom 16.1% ------------------------------------------------ Business Services 10.3% ------------------------------------------------ Internet 8.1% ------------------------------------------------ Percentages are based on net assets as of 8/31/06. The portfolio is actively managed and current holdings may be different. MANAGEMENT REVIEW SUMMARY OF RESULTS For the twelve months ended August 31, 2006, Class A shares of the MFS Technology Fund provided a total return of 14.59%, at net asset value. This compares with a return of 1.69% for the fund's benchmark, the Goldman Sachs Technology Industry Composite Index. CONTRIBUTORS TO PERFORMANCE Strong stock selection was the principal source of positive relative performance in the electronics, computer software, and business services industries over the period. In the electronics industry, NAND flash memory storage products maker SanDisk was the fund's top contributor relative to the index. While the nature of the flash memory business is that prices fall at a rapid pace, SanDisk has been able to drive costs down at an equal pace while benefiting from the elasticity of demand driven by lower priced innovative consumer products. More recently, stock performance was driven by the M-Systems acquisition, which extends the life of SanDisk's intellectual property and the capacity upgrades for Apple's iPod Nano and SanDisk's own Sansa, which drove tightness in the NAND flash memory storage products market. Our holdings in South Korean microchip and electronics manufacturer Samsung Electronics and electronic and power supply manufacturer Delta Electronics*, neither of which are index constituents, also boosted relative returns. In the computer software industry, information technology automation software products provider Opsware and business intelligence software company MicroStrategy*, neither of which are index constituents, aided results. Opsware's stock price increased as the company exceeded its revenue guidance and, in February 2006, announced that Cisco Systems will distribute and integrate Opsware's Network Automation product set. In the business services industry, network and Internet exchange services provider Equinix and custom IT consulting and technology services provider Cognizant Technology Solutions Corp were among the fund's top contributors. Shares of Equinix climbed as the company benefited from strong demand and the ability to increase pricing on its services. Stock selection and, to a lesser extent, our overweighted positions in the specialty stores industry helped relative performance. Consumer electronics retailer Circuit City Stores* (not an index constituent) added to relative returns. Not owning stocks in the poor-performing consumer services industry also bolstered results. In particular, avoiding online auctioneer EBay was beneficial as this stock severely underperformed the broad benchmark during the reporting period. Stock selection and, to a lesser extent, our underweighing in the Internet industry aided relative performance. A combination of stock selection and our positioning in the leisure and toys industry, particularly video game-related holdings, also had a positive impact on relative performance. No stocks in these industries were among the fund's top contributors. DETRACTORS FROM PERFORMANCE The fund's allocation to the broadcasting industry, which is not represented in the index, held back relative performance. Within this industry, radio broadcaster XM Satellite Radio Holdings was among the fund's top detractors. Weak stock selection in the network and telecom industry also hurt results. Network equipment manufacturer Juniper Networks and global telecom equipment company Nortel Networks had a negative impact on relative returns. Earlier in the year, Juniper lowered its revenue guidance for the first half of 2006. Later in the reporting period, the company delayed its second quarter filing as a result of investigations into its options practices. The company also guided down its outlook for the second half of the year. Stocks in other industries that detracted from relative performance included network chip maker Marvell Technology Group and computer products and services provider Hewlett-Packard. Over the period, Marvell's performance was marred by concerns relating to Seagate's proposed acquisition of Maxtor as the acquisition created uncertainty on Marvell's access to Maxtor hard disk drives. Additionally, we feel that Marvell was hurt by an inventory build-up earlier in the period and its purchase of Intel's wireless baseband and application processor business. For Hewlett-Packard, we missed the run up in the stock's strong performance during the reporting period. Respectfully, Telis D. Bertsekas Portfolio Manager * Security was not held in the portfolio at period end. The views expressed in this report are those of the portfolio manager only through the end of the period of the report as stated on the cover and do not necessarily reflect the views of MFS or any other person in the MFS organization. These views are subject to change at any time based on market and other conditions, and MFS disclaims any responsibility to update such views. These views may not be relied upon as investment advice or an indication of trading intent on behalf of any MFS portfolio. References to specific securities are not recommendations of such securities, and may not be representative of any MFS portfolio's current or future investments. PERFORMANCE SUMMARY THROUGH 8/31/06 The following chart illustrates the historical performance of the fund's Class A shares in comparison to its benchmark. Performance results include the deduction of the maximum applicable sales charge and reflect the percentage change in net asset value, including reinvestment of dividends and capital gains distributions. The performance of other share classes will be greater than or less than that of the class depicted below. Benchmark comparisons are unmanaged; do not reflect sales charges, commissions or expenses; and cannot be invested in directly. (See Notes to Performance Summary.) PERFORMANCE DATA SHOWN REPRESENTS PAST PERFORMANCE AND IS NO GUARANTEE OF FUTURE RESULTS. INVESTMENT RETURN AND PRINCIPAL VALUE FLUCTUATE SO YOUR SHARES, WHEN SOLD, MAY BE WORTH MORE OR LESS THAN THE ORIGINAL COST; CURRENT PERFORMANCE MAY BE LOWER OR HIGHER THAN QUOTED. FOR MOST RECENT MONTH-END PERFORMANCE, PLEASE VISIT MFS.COM. (FOR THE MOST RECENT MONTH-END PERFORMANCE FOR CLASS I SHARES CALL 1-800-343-2829.) THE PERFORMANCE SHOWN DOES NOT REFLECT THE DEDUCTION OF TAXES, IF ANY, THAT A SHAREHOLDER WOULD PAY ON FUND DISTRIBUTIONS OR THE REDEMPTION OF FUND SHARES. GROWTH OF A HYPOTHETICAL $10,000 INVESTMENT (For the period from the commencement of the fund's investment operations, January 2, 1997, through the stated period end.) MFS Goldman Sachs Technology Technology Fund Industry - Class A Composite Index 1/97 $ 9,425 $10,000 8/97 11,810 13,556 8/98 11,738 13,111 8/99 19,397 27,522 8/00 36,453 44,917 8/01 14,211 16,459 8/02 8,309 10,414 8/03 11,034 14,411 8/04 10,236 13,980 8/05 11,752 16,297 8/06 13,467 16,572 TOTAL RETURNS THROUGH 8/31/06 AVERAGE ANNUAL WITHOUT SALES CHARGE Share class Class inception date 1-yr 5-yr Life (t) - ------------------------------------------------------------------------------ A 1/02/97 14.59% -1.07% 3.76% - ------------------------------------------------------------------------------ B 4/14/00 13.80% -1.72% 3.31% - ------------------------------------------------------------------------------ C 4/14/00 13.82% -1.74% 3.30% - ------------------------------------------------------------------------------ I 1/02/97 14.93% -0.75% 4.05% - ------------------------------------------------------------------------------ R 12/31/02 14.32% -1.21% 3.69% - ------------------------------------------------------------------------------ R1 4/01/05 13.68% -1.28% 3.65% - ------------------------------------------------------------------------------ R2 4/01/05 14.14% -1.18% 3.70% - ------------------------------------------------------------------------------ R3 10/31/03 14.16% -1.28% 3.65% - ------------------------------------------------------------------------------ R4 4/01/05 14.35% -1.09% 3.75% - ------------------------------------------------------------------------------ R5 4/01/05 14.79% -0.99% 3.81% - ------------------------------------------------------------------------------ AVERAGE ANNUAL Comparative benchmark - ------------------------------------------------------------------------------ Goldman Sachs Technology Industry Composite Index (f) 1.69% 0.14% 5.36% - ------------------------------------------------------------------------------ AVERAGE ANNUAL WITH SALES CHARGE Share class - ------------------------------------------------------------------------------ A 8.00% -2.24% 3.13% With Initial Sales Charge (5.75%) - ------------------------------------------------------------------------------ B 9.80% -2.11% 3.31% With CDSC (Declining over six years from 4% to 0%) (x) - ------------------------------------------------------------------------------ C 12.82% -1.74% 3.30% With CDSC (1% for 12 months) (x) - ------------------------------------------------------------------------------ Class I, R, R1, R2, R3, R4, and R5 shares do not have a sales charge. Please see Notes to Performance Summary for more details. CDSC - Contingent Deferred Sales Charge. (f) Source: FactSet Research Systems Inc. (t) For the period from the commencement of the fund's investment operations, January 2, 1997 through the stated period end. (x) Assuming redemption at the end of the applicable period. INDEX DEFINITION Goldman Sachs Technology Industry Composite Index - A modified capitalization- weighted index of selected technology stocks. It is not possible to invest directly in an index. NOTES TO PERFORMANCE SUMMARY Class R shares are available only to existing Class R shareholders. Class I shares are only available to certain eligible investors, and Class R1, R2, R3, R4, and R5 shares are only available to certain retirement plans. Performance for share classes offered after Class A shares includes the performance of the fund's Class A shares for periods prior to their offering. This blended class performance has been adjusted to take into account differences in sales loads, if any, applicable to these share classes, but has not been adjusted to take into account differences in class specific operating expenses (such as Rule 12b-1 fees). Compared to performance these share classes would have experienced had they been offered for the entire period, the use of blended performance generally results in higher performance for share classes with higher operating expenses than the share class to which it is blended, and lower performance for share classes with lower operating expenses than the share class to which it is blended. Performance results reflect any applicable expense subsidies and waivers in effect during the periods shown. Without such subsidies and waivers the fund's performance results would be less favorable. Please see the prospectus and financial statements for complete details. From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower. EXPENSE TABLE Fund expenses borne by the shareholders during the period, March 1, 2006 through August 31, 2006. As a shareholder of the fund, you incur two types of costs: (1) transaction costs, including sales charges (loads) on certain purchase or redemption payments and redemption fees on certain exchanges and redemptions, and (2) ongoing costs, including management fees; distribution and service (12b-1) fees; and other fund expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in the fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period March 1, 2006 through August 31, 2006. ACTUAL EXPENSES The first line for each share class in the following table provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number in the first line under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. HYPOTHETICAL EXAMPLE FOR COMPARISON PURPOSES The second line for each share class in the following table provides information about hypothetical account values and hypothetical expenses based on the fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs, such as sales charges (loads) or redemption fees. Therefore, the second line for each share class in the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher. - ------------------------------------------------------------------------------ Annualized Beginning Ending Expenses Annualized Account Account Paid During Share Expense Value Value Period (p) Class Ratio 3/01/06 8/31/06 3/01/06-8/31/06 - ------------------------------------------------------------------------------ Actual 1.50% $1,000.00 $981.60 $7.49 A ------------------------------------------------------------------- Hypothetical (h) 1.50% $1,000.00 $1,017.64 $7.63 - ------------------------------------------------------------------------------ Actual 2.15% $1,000.00 $977.90 $10.72 B ------------------------------------------------------------------- Hypothetical (h) 2.15% $1,000.00 $1,014.37 $10.92 - ------------------------------------------------------------------------------ Actual 2.15% $1,000.00 $978.90 $10.72 C ------------------------------------------------------------------- Hypothetical (h) 2.15% $1,000.00 $1,014.37 $10.92 - ------------------------------------------------------------------------------ Actual 1.15% $1,000.00 $983.00 $5.75 I ------------------------------------------------------------------- Hypothetical (h) 1.15% $1,000.00 $1,019.41 $5.85 - ------------------------------------------------------------------------------ Actual 1.65% $1,000.00 $980.50 $8.24 R ------------------------------------------------------------------- Hypothetical (h) 1.65% $1,000.00 $1,016.89 $8.39 - ------------------------------------------------------------------------------ Actual 2.25% $1,000.00 $977.90 $11.22 R1 ------------------------------------------------------------------- Hypothetical (h) 2.25% $1,000.00 $1,013.86 $11.42 - ------------------------------------------------------------------------------ Actual 1.90% $1,000.00 $979.90 $9.48 R2 ------------------------------------------------------------------- Hypothetical (h) 1.90% $1,000.00 $1,015.63 $9.65 - ------------------------------------------------------------------------------ Actual 1.80% $1,000.00 $980.40 $8.99 R3 ------------------------------------------------------------------- Hypothetical (h) 1.80% $1,000.00 $1,016.13 $9.15 - ------------------------------------------------------------------------------ Actual 1.55% $1,000.00 $980.60 $7.74 R4 ------------------------------------------------------------------- Hypothetical (h) 1.55% $1,000.00 $1,017.39 $7.88 - ------------------------------------------------------------------------------ Actual 1.25% $1,000.00 $982.60 $6.25 R5 ------------------------------------------------------------------- Hypothetical (h) 1.25% $1,000.00 $1,018.90 $6.36 - ------------------------------------------------------------------------------ (h) 5% class return per year before expenses. (p) Expenses paid is equal to each class' annualized expense ratio, as shown above, multiplied by the average account value over the period, multiplied by the number of days in the period, divided by the number of days in the year. Expenses paid do not include any applicable sales charges (loads) or redemption fees. If these transaction costs had been included, your costs would have been higher. PORTFOLIO OF INVESTMENTS 8/31/06 The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes. Common Stocks - 98.4% - -------------------------------------------------------------------------------------------------------------- ISSUER SHARES/PAR VALUE ($) - -------------------------------------------------------------------------------------------------------------- Broadcasting - 0.9% - -------------------------------------------------------------------------------------------------------------- XM Satellite Radio Holdings, Inc., "A" (l)(n) 74,000 $ 959,040 - -------------------------------------------------------------------------------------------------------------- Business Services - 10.3% - -------------------------------------------------------------------------------------------------------------- Amdocs Ltd. (n) 46,600 $ 1,768,470 Cognizant Technology Solutions Corp., "A" (n) 29,570 2,067,239 Equinix, Inc. (l)(n) 39,420 2,273,351 First Data Corp. 69,980 3,007,040 Ultimate Software Group, Inc. (l)(n) 62,200 1,405,720 ------------- $ 10,521,820 - -------------------------------------------------------------------------------------------------------------- Computer Software - 24.0% - -------------------------------------------------------------------------------------------------------------- Adobe Systems, Inc. (l)(n) 73,620 $ 2,388,233 Blue Coat Systems, Inc. (l)(n) 58,300 991,683 FileNet Corp. (l)(n) 79,300 2,770,742 McAfee, Inc. (n) 82,030 1,867,003 Opsware, Inc. (l)(n) 235,700 1,661,685 Oracle Corp. (n) 169,398 2,651,079 Salesforce.com, Inc. (l)(n) 111,920 3,859,001 Symantec Corp. (n) 145,801 2,717,731 TIBCO Software, Inc. (n) 576,110 4,528,225 Witness Systems, Inc. (l)(n) 63,500 1,031,875 ------------- $ 24,467,257 - -------------------------------------------------------------------------------------------------------------- Computer Software - Systems - 6.3% - -------------------------------------------------------------------------------------------------------------- Apple Computer, Inc. (n) 22,000 $ 1,492,700 Hewlett-Packard Co. 76,300 2,789,528 Sun Microsystems, Inc. (n) 425,600 2,123,744 ------------- $ 6,405,972 - -------------------------------------------------------------------------------------------------------------- Electronics - 24.3% - -------------------------------------------------------------------------------------------------------------- Integrated Device Technology, Inc. (n) 117,900 $ 2,031,417 Intel Corp. 246,300 4,812,702 Linear Technology Corp. 42,600 1,448,826 Marvell Technology Group Ltd. (n) 228,500 4,001,035 Nintendo Co. Ltd. 9,400 1,929,191 Samsung Electronics Co. Ltd., GDR 7,838 2,664,920 SanDisk Corp. (l)(n) 92,430 5,445,976 Volterra Semiconductor Corp. (l)(n) 163,730 2,469,048 ------------- $ 24,803,115 - -------------------------------------------------------------------------------------------------------------- Internet - 8.1% - -------------------------------------------------------------------------------------------------------------- Baidu.com, Inc., ADR (l)(n) 35,290 $ 2,742,033 Google, Inc., "A" (n) 4,790 1,813,159 NHN Corp. 10,330 975,724 RightNow Technologies, Inc. (l)(n) 70,000 1,075,200 TENCENT Holdings Ltd. 784,000 1,713,738 ------------- $ 8,319,854 - -------------------------------------------------------------------------------------------------------------- Leisure & Toys - 5.3% - -------------------------------------------------------------------------------------------------------------- Capcom Co. Ltd. (l) 106,500 $ 1,545,807 Electronic Arts, Inc. (l)(n) 54,200 2,762,574 THQ, Inc. (l)(n) 41,200 1,062,960 ------------- $ 5,371,341 - -------------------------------------------------------------------------------------------------------------- Network & Telecom - 16.1% - -------------------------------------------------------------------------------------------------------------- Cisco Systems, Inc. (n) 288,933 $ 6,353,637 Juniper Networks, Inc. (l)(n) 205,830 3,019,526 NICE Systems Ltd., ADR (n) 83,680 2,088,653 Nortel Networks Corp. (l)(n) 1,566,470 3,273,922 Redback Networks, Inc. (l)(n) 92,300 1,720,472 ------------- $ 16,456,210 - -------------------------------------------------------------------------------------------------------------- Telephone Services - 3.1% - -------------------------------------------------------------------------------------------------------------- Global Crossing Ltd. (l)(n) 67,310 $ 1,128,116 Level 3 Communications, Inc. (l)(n) 451,170 1,998,683 ------------- $ 3,126,799 - -------------------------------------------------------------------------------------------------------------- TOTAL COMMON STOCKS (IDENTIFIED COST, $102,120,832) $ 100,431,408 - -------------------------------------------------------------------------------------------------------------- Collateral for Securities Loaned - 23.2% - -------------------------------------------------------------------------------------------------------------- Navigator Securities Lending Prime Portfolio, at Cost and Net Asset Value 23,723,385 $ 23,723,385 - -------------------------------------------------------------------------------------------------------------- TOTAL INVESTMENTS (IDENTIFIED COST, $125,844,217) $ 124,154,793 - -------------------------------------------------------------------------------------------------------------- Other Assets, Less Liabilities - (21.6)% (22,063,640) - -------------------------------------------------------------------------------------------------------------- NET ASSETS - 100.0% $ 102,091,153 - -------------------------------------------------------------------------------------------------------------- (l) All or a portion of this security is on loan. (n) Non-income producing security. The following abbreviations are used in this report and are defined: ADR American Depository Receipt GDR Global Depository Receipt SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENT OF ASSETS AND LIABILITIES At 8/31/06 This statement represents your fund's balance sheet, which details the assets and liabilities comprising the total value of the fund. ASSETS - ------------------------------------------------------------------------------------------------------- Investments, at value, including $23,081,209 of securities on loan (identified cost, $125,844,217) $124,154,793 Foreign currency, at value (identified cost, $1,441,710) 1,390,724 Receivable for investments sold 2,707,095 Receivable for fund shares sold 34,367 Interest and dividends receivable 33,349 Receivable from investment adviser 11,979 Other assets 786 - ------------------------------------------------------------------------------------------------------- Total assets $128,333,093 - ------------------------------------------------------------------------------------------------------- LIABILITIES - ------------------------------------------------------------------------------------------------------- Payable to custodian $238,650 Payable for investments purchased 1,988,435 Payable for fund shares reacquired 100,643 Collateral for securities loaned, at value 23,723,385 Payable to affiliates Management fee 4,178 Shareholder servicing costs 43,875 Distribution and service fees 3,720 Administrative services fee 145 Retirement plan administration and services fees 17 Payable for independent trustees' compensation 43,641 Accrued expenses and other liabilities 95,251 - ------------------------------------------------------------------------------------------------------- Total liabilities $26,241,940 - ------------------------------------------------------------------------------------------------------- Net assets $102,091,153 - ------------------------------------------------------------------------------------------------------- NET ASSETS CONSIST OF - ------------------------------------------------------------------------------------------------------- Paid-in capital $424,777,373 Unrealized appreciation (depreciation) on investments and translation of assets and liabilities in foreign currencies (1,740,453) Accumulated net realized gain (loss) on investments and foreign currency transactions (320,945,767) - ------------------------------------------------------------------------------------------------------- Net assets $102,091,153 - ------------------------------------------------------------------------------------------------------- Shares of beneficial interest outstanding 10,282,588 - ------------------------------------------------------------------------------------------------------- Class A shares - ------------------------------------------------------------------------------------------------------- Net assets $43,312,686 Shares outstanding 4,276,919 - ------------------------------------------------------------------------------------------------------- Net asset value per share $10.13 - ------------------------------------------------------------------------------------------------------- Offering price per share (100/94.25 X net asset value per share) $10.75 - ------------------------------------------------------------------------------------------------------- Statement of Assets and Liabilities - continued Class B shares - ------------------------------------------------------------------------------------------------------- Net assets $39,024,532 Shares outstanding 4,009,810 - ------------------------------------------------------------------------------------------------------- Net asset value and offering price per share $9.73 - ------------------------------------------------------------------------------------------------------- Class C shares - ------------------------------------------------------------------------------------------------------- Net assets $11,659,163 Shares outstanding 1,199,979 - ------------------------------------------------------------------------------------------------------- Net asset value and offering price per share $9.72 - ------------------------------------------------------------------------------------------------------- Class I shares - ------------------------------------------------------------------------------------------------------- Net assets $3,492,025 - ------------------------------------------------------------------------------------------------------- Shares outstanding 336,028 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $10.39 - ------------------------------------------------------------------------------------------------------- Class R shares - ------------------------------------------------------------------------------------------------------- Net assets $3,047,421 Shares outstanding 303,047 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $10.06 - ------------------------------------------------------------------------------------------------------- Class R1 shares - ------------------------------------------------------------------------------------------------------- Net assets $212,991 Shares outstanding 21,920 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $9.72 - ------------------------------------------------------------------------------------------------------- Class R2 shares - ------------------------------------------------------------------------------------------------------- Net assets $367,058 Shares outstanding 37,588 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $9.77 - ------------------------------------------------------------------------------------------------------- Class R3 shares - ------------------------------------------------------------------------------------------------------- Net assets $800,463 Shares outstanding 80,051 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $10.00 - ------------------------------------------------------------------------------------------------------- Class R4 shares - ------------------------------------------------------------------------------------------------------- Net assets $113,262 Shares outstanding 11,193 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $10.12 - ------------------------------------------------------------------------------------------------------- Class R5 shares - ------------------------------------------------------------------------------------------------------- Net assets $61,552 Shares outstanding 6,053 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $10.17 - ------------------------------------------------------------------------------------------------------- On sales of $50,000 or more, the offering price of Class A shares is reduced. A contingent deferred sales charge may be imposed on redemptions of Class A, Class B, and Class C shares. SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENT OF OPERATIONS Year ended 8/31/06 This statement describes how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations. NET INVESTMENT LOSS - ------------------------------------------------------------------------------------------------------ Income Dividends $286,302 Interest 64,993 Income on securities loaned 58,235 Foreign taxes withheld (15,884) - ------------------------------------------------------------------------------------------------------ Total investment income $393,646 - ------------------------------------------------------------------------------------------------------ Expenses Management fee $832,364 Distribution and service fees 741,564 Shareholder servicing costs 380,029 Administrative services fee 23,771 Retirement plan administration and services fees 3,671 Independent trustees' compensation 7,342 Custodian fee 63,760 Registration fees 138,787 Shareholder communications 77,498 Auditing fees 44,872 Legal fees 15,359 Miscellaneous 9,497 - ------------------------------------------------------------------------------------------------------ Total expenses $2,338,514 - ------------------------------------------------------------------------------------------------------ Fees paid indirectly (9,886) Reduction of expenses by investment adviser (320,541) - ------------------------------------------------------------------------------------------------------ Net expenses $2,008,087 - ------------------------------------------------------------------------------------------------------ Net investment loss $(1,614,441) - ------------------------------------------------------------------------------------------------------ REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS - ------------------------------------------------------------------------------------------------------ Realized gain (loss) (identified cost basis) -- Investment transactions $21,203,401 Foreign currency tansactions (34,957) - ------------------------------------------------------------------------------------------------------ Net realized gain (loss) on investments and foreign currency transactions $21,168,444 - ------------------------------------------------------------------------------------------------------ Change in unrealized appreciation (depreciation) -- Investments $(4,957,719) Translation of assets and liabilities in foreign currencies (35,078) - ------------------------------------------------------------------------------------------------------ Net unrealized gain (loss) on investments and foreign currency translation $(4,992,797) - ------------------------------------------------------------------------------------------------------ Net realized and unrealized gain (loss) on investments and foreign currency $16,175,647 - ------------------------------------------------------------------------------------------------------ Change in net assets from operations $14,561,206 - ------------------------------------------------------------------------------------------------------ SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENTS OF CHANGES IN NET ASSETS These statements describe the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions. YEARS ENDED 8/31 -------------------------------------- 2006 2005 CHANGE IN NET ASSETS FROM OPERATIONS - -------------------------------------------------------------------------------------------------------- Net investment loss $(1,614,441) $(1,187,631) Net realized gain (loss) on investments and foreign currency transactions 21,168,444 26,313,940 Net unrealized gain (loss) on investments and foreign currency translation (4,992,797) (3,585,555) - -------------------------------------------------------------------------------------------------------- Change in net assets from operations $14,561,206 $21,540,754 - -------------------------------------------------------------------------------------------------------- Change in net assets from fund share transactions $(23,708,788) $(67,156,944) - -------------------------------------------------------------------------------------------------------- Redemption fees $-- $4,244 - -------------------------------------------------------------------------------------------------------- Total change in net assets $(9,147,582) $(45,611,946) - -------------------------------------------------------------------------------------------------------- NET ASSETS - -------------------------------------------------------------------------------------------------------- At beginning of period 111,238,735 156,850,681 At end of period $102,091,153 $111,238,735 - -------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Statements FINANCIAL HIGHLIGHTS The financial highlights table is intended to help you understand the fund's financial performance for the past 5 years (or life of a particular share class, if shorter). Certain information reflects financial results for a single fund share. The total returns in the table represent the rate by which an investor would have earned (or lost) on an investment in the fund share class (assuming reinvestment of all distributions) held for the entire period. This information has been audited by the fund's independent registered public accounting firm, whose report, together with the fund's financial statements, are included in this report. CLASS A YEARS ENDED 8/31 ------------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $8.84 $7.70 $8.30 $6.25 $10.70 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.11) $(0.05) $(0.10) $(0.07) $(0.11) Net realized and unrealized gain (loss) on investments and foreign currency 1.40 1.19 (0.50) 2.12 (4.34) - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $1.29 $1.14 $(0.60) $2.05 $(4.45) - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $10.13 $8.84 $7.70 $8.30 $6.25 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 14.59 14.81 (7.23)(b) 32.80 (41.53) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.79 1.79 1.60 1.76 1.74 Expenses after expense reductions (f) 1.50 1.51 1.50 1.52 1.51 Net investment loss (1.13) (0.56) (1.10) (1.05) (1.22) Portfolio turnover 217 163 141 162 210 Net assets at end of period (000 Omitted) $43,313 $48,945 $75,786 $101,059 $53,142 - -------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS B YEARS ENDED 8/31 ------------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $8.55 $7.50 $8.13 $6.16 $10.61 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.17) $(0.10) $(0.15) $(0.11) $(0.17) Net realized and unrealized gain (loss) on investments and foreign currency 1.35 1.15 (0.48) 2.08 (4.28) - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $1.18 $1.05 $(0.63) $1.97 $(4.45) - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $9.73 $8.55 $7.50 $8.13 $6.16 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 13.80 14.00 (7.75)(b) 31.98 (41.94) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.44 2.44 2.25 2.42 2.39 Expenses after expense reductions (f) 2.15 2.16 2.15 2.18 2.16 Net investment loss (1.79) (1.24) (1.74) (1.71) (1.87) Portfolio turnover 217 163 141 162 210 Net assets at end of period (000 Omitted) $39,025 $43,765 $50,896 $61,353 $25,997 - -------------------------------------------------------------------------------------------------------------------------- CLASS C YEARS ENDED 8/31 ------------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $8.54 $7.48 $8.12 $6.16 $10.61 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.17) $(0.10) $(0.15) $(0.11) $(0.17) Net realized and unrealized gain (loss) on investments and foreign currency 1.35 1.16 (0.49) 2.07 (4.28) - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $1.18 $1.06 $(0.64) $1.96 $(4.45) - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $9.72 $8.54 $7.48 $8.12 $6.16 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 13.82 14.17 (7.88)(b) 31.82 (41.94) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.44 2.44 2.25 2.42 2.39 Expenses after expense reductions (f) 2.15 2.16 2.15 2.18 2.16 Net investment loss (1.78) (1.22) (1.74) (1.71) (1.87) Portfolio turnover 217 163 141 162 210 Net assets at end of period (000 Omitted) $11,659 $12,414 $15,367 $20,210 $10,476 - -------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS I YEARS ENDED 8/31 -------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $9.04 $7.85 $8.43 $6.33 $10.79 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment income (loss) (d) $(0.08) $0.01 $(0.06) $(0.05) $(0.08) Net realized and unrealized gain (loss) on investments and foreign currency 1.43 1.18 (0.52) 2.15 (4.38) - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $1.35 $1.19 $(0.58) $2.10 $(4.46) - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $10.39 $9.04 $7.85 $8.43 $6.33 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 14.93 15.16 (6.88)(b) 33.18 (41.33) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.43 1.44 1.26 1.41 1.39 Expenses after expense reductions (f) 1.15 1.16 1.16 1.17 1.16 Net investment income (loss) (0.78) 0.17 (0.70) (0.71) (0.87) Portfolio turnover 217 163 141 162 210 Net assets at end of period (000 Omitted) $3,492 $3,384 $13,404 $4,179 $3,045 - -------------------------------------------------------------------------------------------------------------------------- CLASS R YEARS ENDED 8/31 ------------------------------------------------------------- 2006 2005 2004 2003(i) Net asset value, beginning of period $8.80 $7.67 $8.28 $6.16 - ------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.13) $(0.07) $(0.10) $(0.08) Net realized and unrealized gain (loss) on investments and foreign currency 1.39 1.20 (0.51) 2.20 - ------------------------------------------------------------------------------------------------------------------------- Total from investment operations $1.26 $1.13 $(0.61) $2.12 - ------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $10.06 $8.80 $7.67 $8.28 - ------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 14.32 14.73 (7.37)(b) 34.42(n) - ------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.93 1.94 1.76 1.88(a) Expenses after expense reductions (f) 1.65 1.66 1.66 1.64(a) Net investment loss (1.28) (0.79) (1.21) (1.22)(a) Portfolio turnover 217 163 141 162 Net assets at end of period (000 Omitted) $3,047 $2,283 $1,266 $173 - ------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R1 YEARS ENDED 8/31 ------------------------------- 2006 2005(i) Net asset value, beginning of period $8.55 $8.01 - ------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.18) $(0.07) Net realized and unrealized gain (loss) on investments and foreign currency 1.35 0.61(g) - ------------------------------------------------------------------------------------------------------------- Total from investment operations $1.17 $0.54 - ------------------------------------------------------------------------------------------------------------- Net asset value, end of period $9.72 $8.55 - ------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 13.68 6.74(n) - ------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.63 2.62(a) Expenses after expense reductions (f) 2.25 2.34(a) Net investment loss (1.88) (1.90)(a) Portfolio turnover 217 163 Net assets at end of period (000 Omitted) $213 $64 - ------------------------------------------------------------------------------------------------------------- CLASS R2 YEARS ENDED 8/31 ------------------------------- 2006 2005(i) Net asset value, beginning of period $8.56 $8.01 - ------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.15) $(0.05) Net realized and unrealized gain (loss) on investments and foreign currency 1.36 0.60(g) - ------------------------------------------------------------------------------------------------------------- Total from investment operations $1.21 $0.55 - ------------------------------------------------------------------------------------------------------------- Net asset value, end of period $9.77 $8.56 - ------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 14.14 6.87(n) - ------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.33 2.32(a) Expenses after expense reductions (f) 1.90 2.04(a) Net investment loss (1.52) (1.60)(a) Portfolio turnover 217 163 Net assets at end of period (000 Omitted) $367 $85 - ------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R3 YEARS ENDED 8/31 ----------------------------------------------- 2006 2005 2004(i) Net asset value, beginning of period $8.76 $7.66 $8.79 - ----------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ----------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.14) $(0.09) $(0.09) Net realized and unrealized gain (loss) on investments and foreign currency 1.38 1.19 (1.04) - ----------------------------------------------------------------------------------------------------------------- Total from investment operations $1.24 $1.10 $(1.13) - ----------------------------------------------------------------------------------------------------------------- Net asset value, end of period $10.00 $8.76 $7.66 - ----------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 14.16 14.36 (12.86)(b)(n) - ----------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ----------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.18 2.19 2.01(a) Expenses after expense reductions (f) 1.80 1.91 1.91(a) Net investment loss (1.41) (1.07) (1.47)(a) Portfolio turnover 217 163 141 Net assets at end of period (000 Omitted) $800 $192 $132 - ----------------------------------------------------------------------------------------------------------------- CLASS R4 YEARS ENDED 8/31 ------------------------------- 2006 2005(i) Net asset value, beginning of period $8.85 $8.26 - ----------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ----------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.14) $(0.04) Net realized and unrealized gain (loss) on investments and foreign currency 1.41 0.63(g) - ----------------------------------------------------------------------------------------------------------------- Total from investment operations $1.27 $0.59 - ----------------------------------------------------------------------------------------------------------------- Net asset value, end of period $10.12 $8.85 - ----------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 14.35 7.14(n) - ----------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ----------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.84 1.82(a) Expenses after expense reductions (f) 1.55 1.54(a) Net investment loss (1.18) (1.10)(a) Portfolio turnover 217 163 Net assets at end of period (000 Omitted) $113 $54 - ----------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R5 YEARS ENDED 8/31 ------------------------------- 2006 2005(i) Net asset value, beginning of period $8.86 $8.26 - ------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.09) $(0.03) Net realized and unrealized gain (loss) on investments and foreign currency 1.40 0.63(g) - ------------------------------------------------------------------------------------------------------------- Total from investment operations $1.31 $0.60 - ------------------------------------------------------------------------------------------------------------- Net asset value, end of period $10.17 $8.86 - ------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 14.79 7.26(n) - ------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.53 1.52(a) Expenses after expense reductions (f) 1.25 1.24(a) Net investment loss (0.88) (0.79)(a) Portfolio turnover 217 163 Net assets at end of period (000 Omitted) $62 $54 - ------------------------------------------------------------------------------------------------------------- Any redemption fees charged by the fund during the 2004 and 2005 fiscal years resulted in a per share impact of less than $0.01. (a) Annualized. (b) The fund's net asset value and total return calculation include a non-recurring accrual recorded as a result of an administrative proceeding regarding disclosure of brokerage allocation practices in connection with fund sales. The non-recurring accrual did not have a material impact on the net asset value per share based on the shares outstanding on the day the proceeds were recorded. (d) Per share data are based on average shares outstanding. (f) Ratios do not reflect reductions from fees paid indirectly. (g) The per share amount is not in accordance with the net realized and unrealized gain/loss for the period because of the timing of sales of fund shares and the amount of per share realized and unrealized gains and losses at such time. (i) For the period from the class' inception, December 31, 2002 (Class R), October 31, 2003 (Class R3) and April 1, 2005 (Classes R1, R2, R4, and R5) through the stated period end. (n) Not annualized. (r) Certain expenses have been reduced without which performance would have been lower. (s) From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower. (t) Total returns do not include any applicable sales charges. SEE NOTES TO FINANCIAL STATEMENTS NOTES TO FINANCIAL STATEMENTS (1) BUSINESS AND ORGANIZATION MFS Technology Fund (the fund) is a series of MFS Series Trust I (the trust). The trust is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open-end management investment company. (2) SIGNIFICANT ACCOUNTING POLICIES GENERAL - The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The fund can invest in foreign securities, including securities of emerging market issuers. Investments in foreign securities are vulnerable to the effects of changes in the relative values of the local currency and the U.S. dollar and to the effects of changes in each country's legal, political, and economic environment. The markets of emerging markets countries are generally more volatile than the markets of developed countries with more mature economies. All of the risks of investing in foreign securities previously described are heightened when investing in emerging markets countries. INVESTMENT VALUATIONS - Equity securities, including restricted equity securities, are generally valued at the last sale or official closing price as reported by an independent pricing service on the market or exchange on which they are primarily traded. For securities for which there were no sales reported that day, equity securities are generally valued at the last quoted daily bid quotation as reported by an independent pricing service on the market or exchange on which they are primarily traded. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which approximates market value. Open-end investment companies are generally valued at their net asset value per share. Securities and other assets generally valued on the basis of information from an independent pricing service may also be valued at a broker-dealer bid quotation. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates reported by an independent pricing service. The Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund's investments (including any fair valuation) to the adviser pursuant to valuation policies and procedures approved by the Board. If the adviser determines that reliable market quotations are not readily available, investments are valued at fair value as determined in good faith by the adviser in accordance with such procedures under the oversight of the Board of Trustees. Under the fund's valuation policies and procedures, market quotations are not considered to be readily available for many types of debt instruments. These investments are generally valued at fair value based on information from independent pricing services. The adviser may rely on independent pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund's net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of investments used to determine the fund's net asset value may differ from quoted or published prices for the same investments. In addition, investments may be valued at fair value if the adviser determines that an investment's value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund's net asset value, or after the halting of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. Events that occur on a frequent basis after foreign markets close (such as developments in foreign markets and significant movements in the U.S. markets) and prior to the determination of the fund's net asset value may be deemed to have a material affect on the value of securities traded in foreign markets. Accordingly, the fund's foreign equity securities may often be valued at fair value. REPURCHASE AGREEMENTS - The fund may enter into repurchase agreements with institutions that the fund's investment adviser has determined are creditworthy. Each repurchase agreement is recorded at cost. The fund requires that the securities collateral in a repurchase transaction be transferred to the custodian in a manner sufficient to enable the fund to obtain those securities in the event of a default under the repurchase agreement. The fund monitors, on a daily basis, the value of the collateral to ensure that its value, including accrued interest, is greater than amounts owed to the fund under each such repurchase agreement. The fund, along with other affiliated entities of Massachusetts Financial Services Company (MFS), may utilize a joint trading account for the purpose of entering into one or more repurchase agreements. FOREIGN CURRENCY TRANSLATION - Purchases and sales of foreign investments, income, and expenses are converted into U.S. dollars based upon currency exchange rates prevailing on the respective dates of such transactions. Gains and losses attributable to foreign currency exchange rates on sales of securities are recorded for financial statement purposes as net realized gains and losses on investments. Gains and losses attributable to foreign exchange rate movements on income and expenses are recorded for financial statement purposes as foreign currency transaction gains and losses. That portion of both realized and unrealized gains and losses on investments that results from fluctuations in foreign currency exchange rates is not separately disclosed. SECURITY LOANS - State Street Bank and Trust Company ("State Street"), as lending agent, may loan the securities of the fund to certain qualified institutions (the "Borrowers") approved by the fund. The loans are collateralized at all times by cash and/or U.S. Treasury securities in an amount at least equal to the market value of the securities loaned. State Street provides the fund with indemnification against Borrower default. The fund bears the risk of loss with respect to the investment of cash collateral. On loans collateralized by cash, the cash collateral is invested in a money market fund or short-term securities. A portion of the income generated upon investment of the collateral is remitted to the Borrowers, and the remainder is allocated between the fund and the lending agent. On loans collateralized by U.S. Treasury securities, a fee is received from the Borrower, and is allocated between the fund and the lending agent. The dividend and interest income earned on the securities loaned is accounted for in the same manner as other dividend and interest income. SHORT TERM FEES - For purchases made on or after July 1, 2004 and before April 1, 2005, the fund charged a 2% redemption fee (which was retained by the fund) on proceeds from Class A, Class B, Class C, and Class I shares redeemed or exchanged within 5 business days following their acquisition (either by purchase or exchange). Effective April 1, 2005, the fund no longer charges a redemption fee. See the fund's prospectus for details. Any redemption fees charged are accounted for as an addition to paid-in-capital. INVESTMENT TRANSACTIONS AND INCOME - Investment transactions are recorded on the trade date. Interest income is recorded on the accrual basis. All premium and discount is amortized or accreted for financial statement purposes in accordance with U.S. generally accepted accounting principles. All discount is accreted for tax reporting purposes as required by federal income tax regulations. Dividends received in cash are recorded on the ex-dividend date. Certain dividends from foreign securities will be recorded when the fund is informed of the dividend if such information is obtained subsequent to the ex- dividend date. Dividend and interest payments received in additional securities are recorded on the ex-dividend or ex-interest date in an amount equal to the value of the security on such date. The fund may receive proceeds from litigation settlements involving its portfolio holdings. Any proceeds received are reflected in realized gain/loss in the Statement of Operations, or in unrealized gain/loss if the security is still held by the fund. FEES PAID INDIRECTLY - The fund's custody fee is reduced according to an arrangement that measures the value of cash deposited with the custodian by the fund. During the year ended August 31, 2006, the fund's custodian fees were reduced by $8,043 under this arrangement. This amount is shown as a reduction of total expenses on the Statement of Operations. The fund has entered into a commission recapture agreement, under which certain brokers will credit the fund a portion of the commissions generated, to offset certain expenses of the fund. For the year ended August 31, 2006, the fund's custodian expenses were reduced by $1,843 under this agreement. These amounts are shown as a reduction of total expenses on the Statement of Operations. Effective January 1, 2006, the commission recapture agreement was terminated. TAX MATTERS AND DISTRIBUTIONS - The fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable income, including realized capital gains. Accordingly, no provision for federal income tax is required in the financial statements. Foreign taxes, if any, have been accrued by the fund in the accompanying financial statements. Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future. Distributions in excess of net investment income or net realized gains are temporary overdistributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions for financial statement and tax purposes. Book/tax differences primarily relate to net operating losses and wash sale loss deferrals. The fund declared no distributions for the years ended August 31, 2006 and August 31, 2005. The federal tax cost and the tax basis components of distributable earnings were as follows: AS OF 8/31/06 Cost of investments $126,641,969 ---------------------------------------------------------- Gross appreciation 5,553,753 Gross depreciation (8,040,929) ---------------------------------------------------------- Net unrealized appreciation (depreciation) $(2,487,176) Capital loss carryforwards $(320,056,572) Other temporary differences (142,472) As of August 31, 2006, the fund had capital loss carryforwards available to offset future realized gains. Such losses expire as follows: 8/31/08 $(7,419,613) 8/31/09 (113,374,272) 8/31/10 (119,907,823) 8/31/11 (74,891,618) 8/31/12 (4,463,246) ---------------------------------------------------------- $(320,056,572) The availability of a portion of the capital loss carryforwards, which were acquired on August 22, 2003, in connection with the MFS Global Telecommunications Fund merger, may be limited in a given year. In June 2006, FASB Interpretation No. 48, Accounting for Uncertainty in Income Taxes (the "Interpretation") was issued, and is effective for fiscal years beginning after December 15, 2006 and is to be applied to all open tax years as of the effective date. This Interpretation prescribes a minimum threshold for financial statement recognition of the benefit of a tax position taken or expected to be taken in a tax return, and requires certain expanded disclosures. Management has recently begun to evaluate the application of the Interpretation to the fund, and has not at this time determined the impact, if any, resulting from the adoption of this Interpretation on the fund's financial statements. MULTIPLE CLASSES OF SHARES OF BENEFICIAL INTEREST - The fund offers multiple classes of shares, which differ in their respective distribution and service fees. All shareholders bear the common expenses of the fund based on daily net assets of each class, without distinction between share classes. Dividends are declared separately for each class. Differences in per share dividend rates are generally due to differences in separate class expenses. Class B shares will convert to Class A shares approximately eight years after purchase. (3) TRANSACTIONS WITH AFFILIATES INVESTMENT ADVISER - The fund has an investment advisory agreement with Massachusetts Financial Services Company (MFS) to provide overall investment management and related administrative services and facilities to the fund. The management fee is computed daily and paid monthly at an annual rate of 0.75% of the fund's average daily net assets. The investment adviser has agreed in writing to reduce its management fee to 0.70% of average daily net assets in excess of $1.0 billion. This written agreement may be rescinded only upon consent of the fund's Board of Trustees. For the year ended August 31, 2006, the fund's average daily net assets did not exceed $1.0 billion and therefore, the management fee was not reduced. The management fee incurred for the year ended August 31, 2006 was equivalent to an annual effective rate of 0.75% of the fund's average daily net assets. The investment adviser has agreed in writing to pay a portion of the fund's operating expenses, exclusive of management, distribution and service, retirement plan administration and services, and certain other fees and expenses, such that operating expenses do not exceed 0.40% annually of the fund's average daily net assets. This written agreement will continue through December 31, 2006 unless changed or rescinded by the fund's Board of Trustees. For the year ended August 31, 2006, this reduction amounted to $318,736 and is reflected as a reduction of total expenses in the Statement of Operations. DISTRIBUTOR - MFS Fund Distributors, Inc. (MFD), a wholly-owned subsidiary of MFS, as distributor, received $8,891 for the year ended August 31, 2006, as its portion of the initial sales charge on sales of Class A shares of the fund. The Board of Trustees has adopted a distribution plan for certain class shares pursuant to Rule 12b-1 of the Investment Company Act of 1940. The fund's distribution plan provides that the fund will pay MFD for services provided by MFD and financial intermediaries in connection with the distribution and servicing of certain share classes. One component of the plan is a distribution fee paid to MFD and another component of the plan is a service fee paid to MFD. MFD may subsequently pay all, or a portion, of the distribution and/or service fees to financial intermediaries. Distribution Fee Plan Table: TOTAL ANNUAL DISTRIBUTION DISTRIBUTION SERVICE DISTRIBUTION EFFECTIVE AND SERVICE FEE RATE FEE RATE PLAN(d) RATE(e) FEE Class A 0.10% 0.25% 0.35% 0.35% $168,708 Class B 0.75% 0.25% 1.00% 1.00% 428,513 Class C 0.75% 0.25% 1.00% 1.00% 124,916 Class R 0.25% 0.25% 0.50% 0.50% 13,476 Class R1 0.50% 0.25% 0.75% 0.75% 1,090 Class R2 0.25% 0.25% 0.50% 0.50% 1,644 Class R3 0.25% 0.25% 0.50% 0.50% 2,876 Class R4 -- 0.25% 0.25% 0.25% 341 - --------------------------------------------------------------------------------------------------------------------- Total Distribution and Service fees $741,564 (d) In accordance with the distribution plan for certain classes, the fund pays distribution and/or service fees up to these annual percentage rates of each class' average daily net assets. (e) The annual effective rates represent actual fees incurred under the distribution plan for the year ended August 31, 2006 based on each class' average daily net assets. Certain Class A and Class C shares are subject to a contingent deferred sales charge in the event of a shareholder redemption within 12 months of purchase. Class B shares are subject to a contingent deferred sales charge in the event of a shareholder redemption within six years of purchase. All contingent deferred sales charges are paid to MFD and during the year ended August 31, 2006, were as follows: AMOUNT Class A $3,490 Class B $103,483 Class C $1,803 SHAREHOLDER SERVICING AGENT - MFS Service Center, Inc. (MFSC), a wholly-owned subsidiary of MFS, receives a fee from the fund for its services as shareholder servicing agent calculated as a percentage of the average net assets of the fund as determined periodically under the supervision of the fund's Board of Trustees. For the year ended August 31, 2006, the fee was $108,359, which equated to 0.0977% annually of the fund's average daily net assets. MFSC also receives payment from the fund for out-of-pocket and sub- accounting expenses paid by MFSC on behalf of the fund. For the year ended August 31, 2006, these costs amounted to $86,702. The fund may also pay shareholder servicing related costs to non-related parties. ADMINISTRATOR - MFS provides certain financial, legal, shareholder communications, compliance, and other administrative services to the fund. Under an administrative services agreement, the fund partially reimburses MFS the costs incurred to provide these services. The fund is charged a fixed amount plus a fee based on calendar year average net assets. From July 1, 2005 through March 31, 2006, the fund's annual fixed amount was $10,000. Effective April 1, 2006, the fund's annual fixed amount is $17,500. The administrative services fee incurred for the year ended August 31, 2006 was equivalent to an annual effective rate of 0.0214% of the fund's average daily net assets. In addition to the administrative services provided by MFS to the fund as described above, MFS is responsible for providing certain retirement plan administration and services with respect to certain shares. These services include various administrative, recordkeeping, and communication/educational services with respect to the retirement plans which invest in these shares, and may be provided directly by MFS or by a third party. MFS may subsequently pay all, or a portion, of the retirement plan administration and services fee to affiliated or unaffiliated third parties. For the year ended August 31, 2006, the fund paid MFS an annual retirement plan administration and services fee up to the following annual percentage rates of each class' average daily net assets: ANNUAL EFFECTIVE TOTAL FEE RATE RATE(g) AMOUNT Class R1 0.45% 0.35% $654 Class R2 0.40% 0.25% 1,315 Class R3 0.25% 0.15% 1,438 Class R4 0.15% 0.15% 205 Class R5 0.10% 0.10% 59 - -------------------------------------------------------------------------- Total Retirement Plan Administration and Services Fees $3,671 (g) Effective October 1, 2005, MFS has agreed in writing to waive a portion of the retirement plan administration and services fee equal to 0.10% for Class R1 shares, 0.15% for Class R2 shares, and 0.10% for Class R3 shares. This agreement will continue until at least September 30, 2008. For the year ended August 31, 2006, this waiver amounted to $1,181 and is reflected as a reduction of total expenses in the Statement of Operations. TRUSTEES' AND OFFICERS' COMPENSATION - The fund pays compensation to Independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. The fund does not pay compensation directly to Trustees or officers of the fund who are also officers of the investment adviser, all of whom receive remuneration for their services to the fund from MFS. Certain officers and Trustees of the fund are officers or directors of MFS, MFD, and MFSC. The fund has an unfunded, defined benefit plan for certain retired Independent Trustees which resulted in a pension expense of $622. The fund also has an unfunded retirement benefit deferral plan for certain Independent Trustees which resulted in an expense of $515. Both amounts are included in Independent trustees' compensation for the year ended August 31, 2006. The deferred liability for retirement benefits payable to certain Trustees under both plans amounted to $43,122 at August 31, 2006, and is included in payable for independent trustees' compensation. OTHER - This fund and certain other MFS funds (the funds) have entered into a services agreement (the Agreement) which provides for payment of fees by the funds to Tarantino LLC in return for the provision of services of an Independent Chief Compliance Officer (ICCO) for the funds. The ICCO is an officer of the funds and the sole member of Tarantino LLC. The funds can terminate the Agreement with Tarantino LLC at any time under the terms of the Agreement. For the year ended August 31, 2006, the fee paid to Tarantino LLC was $766. MFS has agreed to reimburse the fund for a portion of the payments made by the funds to Tarantino LLC in the amount of $624, which is shown as a reduction of total expenses in the Statement of Operations. Additionally, MFS has agreed to bear all expenses associated with office space, other administrative support, and supplies provided to the ICCO. (4) PORTFOLIO SECURITIES Purchases and sales of investments, other than U.S. government securities, purchased option transactions, and short-term obligations, aggregated $237,927,761 and $264,170,004, respectively. (5) SHARES OF BENEFICIAL INTEREST The fund's Declaration of Trust permits the Trustees to issue an unlimited number of full and fractional shares of beneficial interest. Transactions in fund shares were as follows: YEAR ENDED YEAR ENDED 8/31/06 8/31/05(i) SHARES AMOUNT SHARES AMOUNT Shares sold Class A 936,633 $9,265,824 1,841,301 $15,794,906 Class B 431,689 4,087,393 601,987 5,034,688 Class C 168,042 1,594,448 230,424 1,904,542 Class I 84,307 859,389 153,317 1,351,997 Class R 100,509 991,380 203,930 1,740,254 Class R1 24,284 239,333 7,503 61,010 Class R2 31,881 288,973 9,983 82,697 Class R3 97,787 947,694 11,651 100,006 Class R4 77,723 839,955 6,053 50,000 Class R5 8 78 6,053 50,000 - ---------------------------------------------------------------------------------------------------------- 1,952,863 $19,114,467 3,072,202 $26,170,100 Shares reacquired Class A (2,193,910) $(21,391,336) (6,148,566) $(52,768,987) Class B (1,538,128) (14,435,786) (2,275,531) (18,989,310) Class C (421,535) (3,939,737) (830,211) (6,910,220) Class I (122,505) (1,226,997) (1,486,367) (13,661,239) Class R (57,043) (568,460) (109,402) (937,454) Class R1 (9,866) (98,868) (1) (17) Class R2 (4,276) (38,622) -- -- Class R3 (39,636) (372,004) (7,034) (59,817) Class R4 (72,583) (751,370) -- -- Class R5 (8) (75) -- -- - ---------------------------------------------------------------------------------------------------------- (4,459,490) $(42,823,255) (10,857,112) $(93,327,044) Net change Class A (1,257,277) $(12,125,512) (4,307,265) $(36,974,081) Class B (1,106,439) (10,348,393) (1,673,544) (13,954,622) Class C (253,493) (2,345,289) (599,787) (5,005,678) Class I (38,198) (367,608) (1,333,050) (12,309,242) Class R 43,466 422,920 94,528 802,800 Class R1 14,418 140,465 7,502 60,993 Class R2 27,605 250,351 9,983 82,697 Class R3 58,151 575,690 4,617 40,189 Class R4 5,140 88,585 6,053 50,000 Class R5 -- 3 6,053 50,000 - ---------------------------------------------------------------------------------------------------------- (2,506,627) $(23,708,788) (7,784,910) $(67,156,944) (i) For the period from the class' inception, April 1, 2005 (Classes R1, R2, R4, and R5), through the stated period end. (6) LINE OF CREDIT The fund and other affiliated funds participate in a $1 billion unsecured committed line of credit provided by a syndication of banks under a credit agreement. In addition, the fund and other affiliated funds have established uncommitted borrowing arrangements with certain banks. Borrowings may be made for temporary financing needs. Interest is charged to each fund, based on its borrowings, generally at a rate equal to the Federal Reserve funds rate plus 0.35%. In addition, a commitment fee, based on the average daily, unused portion of the committed line of credit, is allocated among the participating funds at the end of each calendar quarter. For the year ended August 31, 2006, the fund's commitment fee and interest expense were $750 and $0, respectively, and are included in miscellaneous expense on the Statement of Operations. REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM To the Trustees of MFS Series Trust I and Shareholders of MFS Technology Fund: We have audited the accompanying statement of assets and liabilities of MFS Technology Fund (the Fund) (one of the portfolios comprising MFS Series Trust I), including the portfolio of investments, as of August 31, 2006, and the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended, and the financial highlights for each of the periods indicated therein. These financial statements and financial highlights are the responsibility of the Fund's management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. We were not engaged to perform an audit of the Fund's internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Fund's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements and financial highlights, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of August 31, 2006, by correspondence with the Fund's custodian and brokers or by other appropriate auditing procedures where replies from brokers were not received. We believe that our audits provide a reasonable basis for our opinion. In our opinion, the financial statements and financial highlights referred to above present fairly, in all material respects, the financial position of MFS Technology Fund at August 31, 2006, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended, and its financial highlights for each of the periods indicated therein, in conformity with U.S. generally accepted accounting principles. ERNST & YOUNG LLP Boston, Massachusetts October 20, 2006 RESULTS OF SHAREHOLDER MEETING (unaudited) At the annual meeting of shareholders of MFS Technology Fund, which was held on August 15, 2006, the following actions were taken: ITEM 1. - To approve a change to the Fund's sub-classification under the Investment Company Act of 1940 from a diversified company to a non-diversified company. NUMBER OF DOLLARS For 49,798,964 Against 4,165,604 Abstain 3,071,507 ITEM 2. - To approve an amendment to the Fund's fundamental investment policy concerning concentration. NUMBER OF DOLLARS For 49,952,035 Against 3,932,115 Abstain 3,151,926 TRUSTEES AND OFFICERS -- IDENTIFICATION AND BACKGROUND The Trustees and officers of the Trust, as of October 1, 2006, are listed below, together with their principal occupations during the past five years. (Their titles may have varied during that period.) The address of each Trustee and officer is 500 Boylston Street, Boston, Massachusetts 02116. PRINCIPAL OCCUPATIONS DURING POSITION(s) HELD TRUSTEE/OFFICER THE PAST FIVE YEARS & NAME, DATE OF BIRTH WITH FUND SINCE(h) OTHER DIRECTORSHIPS(j) - ------------------- ---------------- --------------- ----------------------------- INTERESTED TRUSTEES Robert J. Manning(k) Trustee February 2004 Massachusetts Financial Services (born 10/20/63) Company, Chief Executive Officer, President, Chief Investment Officer and Director Robert C. Pozen(k) Trustee February 2004 Massachusetts Financial Services (born 8/08/46) Company, Chairman (since February 2004); Secretary of Economic Affairs, The Commonwealth of Massachusetts (January 2002 to December 2002); Fidelity Investments, Vice Chairman (June 2000 to December 2001); Fidelity Management & Research Company (investment adviser), President (March 1997 to July 2001); Bell Canada Enterprises (telecommunications), Director; Medtronic, Inc. (medical technology), Director; Telesat (satellite communications), Director INDEPENDENT TRUSTEES J. Atwood Ives Trustee and Chair February 1992 Private investor; Eastern (born 5/01/36) of Trustees Enterprises (diversified services company), Chairman, Trustee and Chief Executive Officer (until November 2000) Robert E. Butler(n) Trustee January 2006 Consultant - regulatory and (born 11/29/41) compliance matters (since July 2002); PricewaterhouseCoopers LLP (professional services firm), Partner (November 2000 until June 2002) Lawrence H. Cohn, M.D. Trustee August 1993 Brigham and Women's Hospital, (born 3/11/37) Senior Cardiac Surgeon, Chief of Cardiac Surgery (until 2005); Harvard Medical School, Professor of Surgery; Brigham and Women's Hospital Physicians' Organization, Chair (2000 to 2004) David H. Gunning Trustee January 2004 Cleveland-Cliffs Inc. (mining (born 5/30/42) products and service provider), Vice Chairman/Director (since April 2001); Encinitos Ventures (private investment company), Principal (1997 to April 2001); Lincoln Electric Holdings, Inc. (welding equipment manufacturer), Director William R. Gutow Trustee December 1993 Private investor and real estate (born 9/27/41) consultant; Capitol Entertainment Management Company (video franchise), Vice Chairman Michael Hegarty Trustee December 2004 Retired; AXA Financial (financial (born 12/21/44) services and insurance), Vice Chairman and Chief Operating Officer (until May 2001); The Equitable Life Assurance Society (insurance), President and Chief Operating Officer (until May 2001) Lawrence T. Perera Trustee July 1981 Hemenway & Barnes (attorneys), (born 6/23/35) Partner J. Dale Sherratt Trustee August 1993 Insight Resources, Inc. (born 9/23/38) (acquisition planning specialists), President; Wellfleet Investments (investor in health care companies), Managing General Partner (since 1993); Cambridge Nutraceuticals (professional nutritional products), Chief Executive Officer (until May 2001) Laurie J. Thomsen Trustee March 2005 Private investor; Prism Venture (born 8/05/57) Partners (venture capital), Co- founder and General Partner (until June 2004); St. Paul Travelers Companies (commercial property liability insurance), Director Robert W. Uek Trustee January 2006 Retired (since 1999); (born 5/18/41) PricewaterhouseCoopers LLP (professional services firm), Partner (until 1999); Consultant to investment company industry (since 2000); TT International Funds (mutual fund complex), Trustee (2000 until 2005); Hillview Investment Trust II Funds (mutual fund complex), Trustee (2000 until 2005) OFFICERS Maria F. Dwyer(k) President November 2005 Massachusetts Financial Services (born 12/01/58) Company, Executive Vice President and Chief Regulatory Officer (since March 2004); Fidelity Management & Research Company, Vice President (prior to March 2004); Fidelity Group of Funds, President and Treasurer (prior to March 2004) Tracy Atkinson(k) Treasurer September 2005 Massachusetts Financial Services (born 12/30/64) Company, Senior Vice President (since September 2004); PricewaterhouseCoopers LLP, Partner (prior to September 2004) Christopher R. Bohane(k) Assistant Secretary July 2005 Massachusetts Financial Services (born 1/18/74) and Assistant Clerk Company, Vice President and Senior Counsel (since April 2003); Kirkpatrick & Lockhart LLP (law firm), Associate (prior to April 2003) Ethan D. Corey(k) Assistant Secretary July 2005 Massachusetts Financial Services (born 11/21/63) and Assistant Clerk Company, Special Counsel (since December 2004); Dechert LLP (law firm), Counsel (prior to December 2004) David L. DiLorenzo(k) Assistant Treasurer July 2005 Massachusetts Financial Services (born 8/10/68) Company, Vice President (since June 2005); JP Morgan Investor Services, Vice President (prior to June 2005) Timothy M. Fagan(k) Assistant Secretary September 2005 Massachusetts Financial Services (born 7/10/68) and Assistant Clerk Company, Vice President and Senior Counsel (since September 2005); John Hancock Advisers, LLC, Vice President and Chief Compliance Officer (September 2004 to August 2005), Senior Attorney (prior to September 2004); John Hancock Group of Funds, Vice President and Chief Compliance Officer (September 2004 to December 2004) Mark D. Fischer(k) Assistant Treasurer July 2005 Massachusetts Financial Services (born 10/27/70) Company, Vice President (since May 2005); JP Morgan Investment Management Company, Vice President (prior to May 2005) Brian E. Langenfeld(k) Assistant Secretary June 2006 Massachusetts Financial Services (born 3/07/73) and Assistant Clerk Company, Assistant Vice President and Counsel (since May 2006); John Hancock Advisers, LLC, Assistant Vice President and Counsel (May 2005 to April 2006); John Hancock Advisers, LLC, Attorney and Assistant Secretary (prior to May 2005) Ellen Moynihan(k) Assistant Treasurer April 1997 Massachusetts Financial Services (born 11/13/57) Company, Senior Vice President Susan S. Newton(k) Assistant Secretary May 2005 Massachusetts Financial Services (born 3/07/50) and Assistant Clerk Company, Senior Vice President and Associate General Counsel (since April 2005); John Hancock Advisers, LLC, Senior Vice President, Secretary and Chief Legal Officer (prior to April 2005); John Hancock Group of Funds, Senior Vice President, Secretary and Chief Legal Officer (prior to April 2005) Susan A. Pereira(k) Assistant Secretary July 2005 Massachusetts Financial Services (born 11/05/70) and Assistant Clerk Company, Vice President and Senior Counsel (since June 2004); Bingham McCutchen LLP (law firm), Associate (prior to June 2004) Mark N. Polebaum(k) Secretary and Clerk January 2006 Massachusetts Financial Services (born 5/01/52) Company, Executive Vice President, General Counsel and Secretary (since January 2006); Wilmer Cutler Pickering Hale and Dorr LLP (law firm), Partner (prior to January 2006) Frank L. Tarantino Independent Chief June 2004 Tarantino LLC (provider of (born 3/07/44) Compliance Officer compliance services), Principal (since June 2004); CRA Business Strategies Group (consulting services), Executive Vice President (April 2003 to June 2004); David L. Babson & Co. (investment adviser), Managing Director, Chief Administrative Officer and Director (prior to March 2003) James O. Yost(k) Assistant Treasurer September 1990 Massachusetts Financial Services (born 6/12/60) Company, Senior Vice President - ------------ (h) Date first appointed to serve as Trustee/officer of an MFS fund. Each Trustee has served continuously since appointment unless indicated otherwise. (j) Directorships or trusteeships of companies required to report to the Securities and Exchange Commission (i.e., "public companies"). (k) "Interested person" of the Trust within the meaning of the Investment Company Act of 1940 (referred to as the 1940 Act), which is the principal federal law governing investment companies like the fund, as a result of position with MFS. The address of MFS is 500 Boylston Street, Boston, Massachusetts 02116. (n) In 2004 and 2005, Mr. Butler provided consulting services to the independent compliance consultant retained by MFS pursuant to its settlement with the SEC concerning market timing and related matters. The terms of that settlement required that compensation and expenses related to the independent compliance consultant be borne exclusively by MFS and, therefore, MFS paid Mr. Butler for the services he rendered to the independent compliance consultant. In 2004 and 2005, MFS paid Mr. Butler a total of $351,119.29. The Trust held a shareholders' meeting in 2005 to elect Trustees, and will hold a shareholders' meeting at least once every five years thereafter, to elect Trustees. Each Trustee (except Mr. Butler and Mr. Uek) has been elected by shareholders and each Trustee and officer holds office until his or her successor is chosen and qualified or until his or her earlier death, resignation, retirement or removal. Messrs. Butler, Sherratt and Uek and Ms. Thomsen are members of the Trust's Audit Committee. Each of the Trust's Trustees and officers holds comparable positions with certain other funds of which MFS or a subsidiary is the investment adviser or distributor, and, in the case of the officers, with certain affiliates of MFS. As of January 1, 2006, the Trustees served as board members of 98 funds within the MFS Family of Funds. The Statement of Additional Information contains further information about the Trustees and is available without charge upon request by calling 1-800-225-2606. - ------------------------------------------------------------------------------------------------------- INVESTMENT ADVISER CUSTODIAN Massachusetts Financial Services Company State Street Bank and Trust Company 500 Boylston Street, Boston, MA 02116-3741 225 Franklin Street, Boston, MA 02110 DISTRIBUTOR INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM MFS Fund Distributors, Inc. Ernst & Young LLP 500 Boylston Street, Boston, MA 02116-3741 200 Clarendon Street, Boston, MA 02116 PORTFOLIO MANAGER Telis D. Bertsekas BOARD REVIEW OF INVESTMENT ADVISORY AGREEMENT The Investment Company Act of 1940 requires that both the full Board of Trustees and a majority of the non-interested ("independent") Trustees, voting separately, annually approve the continuation of the Fund's investment advisory agreement with MFS. The Trustees consider matters bearing on the Fund and its advisory arrangements at their meetings throughout the year, including a review of performance data at each regular meeting. In addition, the independent Trustees met several times over the course of three months beginning in May and ending in July, 2006 ("contract review meetings") for the specific purpose of considering whether to approve the continuation of the investment advisory agreement for the Fund and the other investment companies that the Board oversees (the "MFS Funds"). The independent Trustees were assisted in their evaluation of the Fund's investment advisory agreement by independent legal counsel, from whom they received separate legal advice and with whom they met separately from MFS during various contract review meetings. The independent Trustees were also assisted in this process by the MFS Funds' Independent Chief Compliance Officer, a full-time senior officer appointed by and reporting to the independent Trustees. In connection with their deliberations regarding the continuation of the investment advisory agreement, the Trustees, including the independent Trustees, considered such information and factors as they believed, in light of the legal advice furnished to them and their own business judgment, to be relevant. The investment advisory agreement for the Fund was considered separately, although the Trustees also took into account the common interests of all MFS Funds in their review. As described below, the Trustees considered the nature, quality, and extent of the various investment advisory, administrative, and shareholder services performed by MFS under the existing investment advisory agreement and other arrangements with the Fund. In connection with their contract review meetings, the Trustees received and relied upon materials which included, among other items: (i) information provided by Lipper Inc. on the investment performance of the Fund for various time periods ended December 31, 2005 and the investment performance of a group of funds with substantially similar investment classifications/objectives (the "Lipper performance universe"), as well as the investment performance of a group of funds identified by objective criteria suggested by MFS ("MFS peer funds"), (ii) information provided by Lipper Inc. on the Fund's advisory fees and other expenses and the advisory fees and other expenses of comparable funds identified by Lipper (the "Lipper expense group"), as well as the advisory fees and other expenses of MFS peer funds, (iii) information provided by MFS on the advisory fees of comparable portfolios of other clients of MFS, including institutional separate accounts and other clients, (iv) information as to whether and to what extent applicable expense waivers, reimbursements or fee "breakpoints" are observed for the Fund, (v) information regarding MFS' financial results and financial condition, including MFS' and certain of its affiliates' estimated profitability from services performed for the Fund and the MFS Funds as a whole, (vi) MFS' views regarding the outlook for the mutual fund industry and the strategic business plans of MFS, (vii) descriptions of various functions performed by MFS for the Funds, such as compliance monitoring and portfolio trading practices, and (viii) information regarding the overall organization of MFS, including information about MFS' senior management and other personnel providing investment advisory, administrative and other services to the Fund and the other MFS Funds. The comparative performance, fee and expense information prepared and provided by Lipper Inc. was not independently verified and the independent Trustees did not independently verify any information provided to them by MFS. The Trustees' conclusion as to the continuation of the investment advisory agreement was based on a comprehensive consideration of all information provided to the Trustees and not the result of any single factor. Some of the factors that figured particularly in the Trustees' deliberations are described below, although individual Trustees may have evaluated the information presented differently from one another, giving different weights to various factors. It is also important to recognize that the fee arrangements for the Fund and other MFS Funds are the result of years of review and discussion between the independent Trustees and MFS, that certain aspects of such arrangements may receive greater scrutiny in some years than others, and that the Trustees' conclusions may be based, in part, on their consideration of these same arrangements during the course of the year and in prior years. Based on information provided by Lipper Inc. and MFS, the Trustees reviewed the Fund's total return investment performance as well as the performance of peer groups of funds over various time periods. The Trustees placed particular emphasis on the total return performance of the Fund's Class A shares in comparison to the performance of funds in its Lipper performance universe over the three-year period ended December 31, 2005, which the Trustees believed was a long enough period to reflect differing market conditions. The Fund's performance was in the 4th quintile relative to the other funds in the universe for this three-year period (the 1st quintile being the best performers and the 5th quintile being the worst performers). The total return performance of the Fund's Class A shares was in the 3rd quintile for the one- year period and the 4th quintile for the five-year period ended December 31, 2005 relative to the Lipper performance universe. Because of the passage of time, these performance results may differ from the performance results for more recent periods, including those shown elsewhere in this report. The Trustees expressed concern about the ongoing substandard investment performance of the Fund. In the course of their deliberations, the Trustees took into account information provided by MFS in connection with the contract review meetings, as well as during investment review meetings conducted with portfolio management personnel during the course of the year, as to MFS' efforts to improve the Fund's performance, including the recent restructuring of responsibilities among MFS' senior investment management executives and assigning a new primary portfolio manager for the Fund in March 2005. In addition, the Trustees requested that they receive a separate update on the Fund's performance at each of their meetings. After reviewing these and related factors, the Trustees concluded, within the context of their overall conclusions regarding the investment advisory agreement, that MFS' responses and efforts and plans to improve investment performance were sufficient to support approval of the continuance of the investment advisory agreement for an additional one year period, but that they would continue to closely monitor the performance of the Fund. In assessing the reasonableness of the Fund's advisory fee, the Trustees considered, among other information, the Fund's advisory fee and the total expense ratio of the Fund's Class A shares as a percentage of average net assets and the advisory fee and total expense ratios of peer groups of funds based on information provided by Lipper Inc. and MFS. The Trustees considered that MFS has agreed in writing to waive a portion of its advisory fee on assets over $1 billion, which may not be changed without Trustee approval, and that MFS currently observes an expense limitation for the Fund. The Trustees also considered that, according to the Lipper data, the Fund's effective advisory fee rate (taking into account the expense limitation) and total expense ratio were each lower than the Lipper expense group median. The Trustees also considered the advisory fees charged by MFS to institutional accounts. In comparing these fees, the Trustees considered information provided by MFS as to the generally broader scope of services provided by MFS to the Fund in comparison to institutional accounts, the higher demands placed on MFS' investment personnel and trading infrastructure as a result of the daily cash in-flows and out-flows of the Fund, and the impact on MFS and expenses associated with the more extensive regulatory regime to which the Fund is subject in comparison to institutional accounts. The Trustees also considered whether the Fund is likely to benefit from any economies of scale in the management of the Fund in the event of growth in assets of the Fund. They noted that the Fund's advisory fee rate schedule is currently subject to a breakpoint as a result of an advisory fee waiver described above. The Trustees concluded that the existing breakpoint was sufficient to allow the Fund to benefit from economies of scale as assets grow. The Trustees also considered information prepared by MFS relating to MFS' costs and profits with respect to the Fund, the MFS Funds considered as a group, and other investment companies and accounts advised by MFS, as well as MFS' methodologies used to determine and allocate its costs to the MFS Funds, the Fund and other accounts and products for purposes of estimating profitability. After reviewing these and other factors described herein, the Trustees concluded, within the context of their overall conclusions regarding the investment advisory agreement, that the advisory fees charged to the Fund represent reasonable compensation in light of the services being provided by MFS to the Fund. In addition, the Trustees considered MFS' resources and related efforts to continue to retain, attract and motivate capable personnel to serve the Fund. The Trustees also considered current and developing conditions in the financial services industry, including the entry into the industry of large and well-capitalized companies which are spending, and appear to be prepared to continue to spend, substantial sums to engage personnel and to provide services to competing investment companies. In this regard, the Trustees also considered the financial resources of MFS and its ultimate parent, Sun Life Financial Inc. The Trustees also considered the advantages and possible disadvantages to the Fund of having an adviser which also serves other investment companies as well as other accounts. The Trustees also considered the nature, quality, cost, and extent of administrative, transfer agency, and distribution services provided to the Fund by MFS and its affiliates under agreements and plans other than the investment advisory agreement, including any 12b-1 fees the Fund pays to MFS Fund Distributors, Inc., an affiliate of MFS. The Trustees also considered the nature, extent and quality of certain other services MFS performs or arranges for on the Fund's behalf, which may include securities lending programs, directed expense payment programs, class action recovery programs, and MFS' interaction with third-party service providers, principally custodians and sub-custodians. The Trustees concluded that the various non-advisory services provided by MFS and its affiliates on behalf of the Funds were satisfactory. The Trustees also considered benefits to MFS from the use of the Fund's portfolio brokerage commissions, if applicable, to pay for investment research (excluding third-party research, for which MFS pays directly), and various other factors. Additionally, the Trustees considered so-called "fall-out benefits" to MFS such as reputational value derived from serving as investment manager to the Fund. Based on their evaluation of factors that they deemed to be material, including those factors described above, the Board of Trustees, including a majority of the independent Trustees, concluded that the Fund's investment advisory agreement with MFS should be continued for an additional one-year period, commencing August 1, 2006. A discussion regarding the Board's most recent review and renewal of the Fund's investment advisory agreement will be available on or before November 1, 2006 by clicking on the fund's name under "Select a fund" on the MFS Web site (mfs.com). PROXY VOTING POLICIES AND INFORMATION A general description of the MFS funds' proxy voting policies and procedures is available without charge, upon request, by calling 1-800-225-2606, by visiting the Proxy Voting section of mfs.com or by visiting the SEC's Web site at http://www.sec.gov. Information regarding how the fund voted proxies relating to portfolio securities during the most recent twelve-month period ended June 30 is available without charge by visiting the Proxy Voting section of mfs.com or by visiting the SEC's Web site at http://www.sec.gov. QUARTERLY PORTFOLIO DISCLOSURE The fund will file a complete schedule of portfolio holdings with the Securities and Exchange Commission (the Commission) for the first and third quarters of each fiscal year on Form N-Q. The fund's Form N-Q may be reviewed and copied at the: Public Reference Room Securities and Exchange Commission 100 F Street, NE, Room 1580 Washington, D.C. 20549 Information on the operation of the Public Reference Room may be obtained by calling the Commission at 1-202-551-5850. The fund's Form N-Q is available on the EDGAR database on the Commission's Internet Web site at http://www.sec.gov, and copies of this information may be obtained, upon payment of a duplicating fee, by electronic request at the following e-mail address: publicinfo@sec.gov or by writing the Public Reference Section at the above address. A shareholder can also obtain the quarterly portfolio holdings report at mfs.com. FEDERAL TAX INFORMATION (unaudited) The fund will notify shareholders of amounts for use in preparing 2006 income tax forms in January 2007. MFS(R) PRIVACY NOTICE Privacy is a concern for every investor today. At MFS Investment Management(R) and the MFS funds, we take this concern very seriously. We want you to understand our policies about the investment products and services that we offer, and how we protect the nonpublic personal information of investors who have a direct relationship with us and our wholly owned subsidiaries. Throughout our business relationship, you provide us with personal information. We maintain information and records about you, your investments, and the services you use. Examples of the nonpublic personal information we maintain include o data from investment applications and other forms o share balances and transactional history with us, our affiliates, or others o facts from a consumer reporting agency We do not disclose any nonpublic personal information about our customers or former customers to anyone, except as permitted by law. We may share nonpublic personal information with third parties or certain of our affiliates in connection with servicing your account or processing your transactions. We may share information with companies or financial institutions that perform marketing services on our behalf or with other financial institutions with which we have joint marketing arrangements, subject to any legal requirements. Authorization to access your nonpublic personal information is limited to appropriate personnel who provide products, services, or information to you. We maintain physical, electronic, and procedural safeguards to help protect the personal information we collect about you. If you have any questions about the MFS privacy policy, please call 1-800-225-2606 any business day between 8 a.m. and 8 p.m. Eastern time. Note: If you own MFS products or receive MFS services in the name of a third party such as a bank or broker-dealer, their privacy policy may apply to you instead of ours. CONTACT US WEB SITE MAILING ADDRESS mfs.com MFS Service Center, Inc. P.O. Box 55824 MFS TALK Boston, MA 1-800-637-8255 02205-5824 24 hours a day OVERNIGHT MAIL ACCOUNT SERVICE AND MFS Service Center, Inc. LITERATURE 500 Boylston Street Boston, MA 02116-3741 SHAREHOLDERS 1-800-225-2606 8 a.m. to 8 p.m. ET INVESTMENT PROFESSIONALS 1-800-343-2829 8 a.m. to 8 p.m. ET RETIREMENT PLAN SERVICES 1-800-637-1255 8 a.m. to 8 p.m. ET - ------------------------------------------------------------------------------- Go paperless with eDELIVERY: Arrange to have MFS send prospectuses, reports, and proxies directly to your e-mail inbox. You'll get timely information and less clutter in your mailbox (not to mention help your fund save printing and postage costs). SIGN UP: If your account is registered with us, simply go to mfs.com, log in to your account via MFS Access, and select the eDelivery sign up options. If you own your MFS fund shares through a financial institution or a retirement plan, MFS TALK, MFS Access, and eDelivery may not be available to you. - ------------------------------------------------------------------------------- M F S(R) INVESTMENT MANAGEMENT M F S(R) INVESTMENT MANAGEMENT [graphic omitted] ANNUAL REPORT MFS(R) CASH RESERVE FUND LETTER FROM THE CEO 1 - ------------------------------------------------------------------ PORTFOLIO COMPOSITION 2 - ------------------------------------------------------------------ PERFORMANCE SUMMARY 3 - ------------------------------------------------------------------ EXPENSE TABLE 6 - ------------------------------------------------------------------ PORTFOLIO OF INVESTMENTS 8 - ------------------------------------------------------------------ STATEMENT OF ASSETS AND LIABILITIES 10 - ------------------------------------------------------------------ STATEMENT OF OPERATIONS 12 - ------------------------------------------------------------------ STATEMENTS OF CHANGES IN NET ASSETS 13 - ------------------------------------------------------------------ FINANCIAL HIGHLIGHTS 14 - ------------------------------------------------------------------ NOTES TO FINANCIAL STATEMENTS 21 - ------------------------------------------------------------------ REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM 29 - ------------------------------------------------------------------ TRUSTEES AND OFFICERS 30 - ------------------------------------------------------------------ BOARD REVIEW OF INVESTMENT ADVISORY AGREEMENT 36 - ------------------------------------------------------------------ PROXY VOTING POLICIES AND INFORMATION 40 - ------------------------------------------------------------------ QUARTERLY PORTFOLIO DISCLOSURE 40 - ------------------------------------------------------------------ FEDERAL TAX INFORMATION 40 - ------------------------------------------------------------------ MFS(R) PRIVACY NOTICE 41 - ------------------------------------------------------------------ CONTACT INFORMATION BACK COVER - ------------------------------------------------------------------ Fund objective: Seeks to provide as high a level of current income as is considered consistent with the preservation of capital and liquidity. THE REPORT IS PREPARED FOR THE GENERAL INFORMATION OF SHAREHOLDERS. IT IS AUTHORIZED FOR DISTRIBUTION TO PROSPECTIVE INVESTORS ONLY WHEN PRECEDED OR ACCOMPANIED BY A CURRENT PROSPECTUS. - ------------------------------------------------------------------------------- NOT FDIC INSURED o MAY LOSE VALUE o NO BANK OR CREDIT UNION GUARANTEE o NOT A DEPOSIT o NOT INSURED BY ANY FEDERAL GOVERNMENT AGENCY OR NCUA/NCUSIF - ------------------------------------------------------------------------------- 8/31/06 LMM-ANN LETTER FROM THE CEO [Photo of Robert J. Manning] Dear Shareholders: The story is as old as the tortoise and the hare, but we believe it is still relevant today -- "slow and steady" is the way to go when it comes to investing. While financial markets will naturally ebb and flow over time, investors who remain committed to a long-term investment strategy are more likely to achieve their goals than those who consistently chase short-term performance. The first half of 2006 brought a high degree of fluctuation in markets around the globe as varying economic factors pulled markets in opposite directions. The global economy, for example, continued to grow at its fastest pace in three decades -- spurred by increased international trade, good job growth, and wage increases. At the same time, central banks around the world raised interest rates in sync in a collaborative attempt to curb inflation. While this was a positive development in some regions, in other cases, economic and market gains were tempered. What does all of this mean to you as an investor? If you're focused on the long term, these global developments become part of a longer cycle instead of one-time events that can have a significant impact on your portfolio. At MFS(R), our investment management process -- honed over 80 years -- combines a unique teamwork approach with an unwavering focus on helping you realize your long-term financial goals. We believe in a three-pronged investment strategy: o ALLOCATE holdings across the major asset classes -- including stocks, bonds, and cash. o DIVERSIFY within each class to take advantage of different market segments and investing styles. o REBALANCE assets regularly to maintain a desired asset allocation. Of course, these strategies cannot guarantee a profit or protect against a loss. Investing and planning for the long term requires diligence and patience, two traits that in our experience are essential to capitalizing on the many opportunities the financial markets can offer -- through both up and down economic cycles. Respectfully, /s/ Robert J. Manning Robert J. Manning Chief Executive Officer and Chief Investment Officer MFS Investment Management(R) October 13, 2006 The opinions expressed in this letter are subject to change, may not be relied upon for investment advice, and no forecasts can be guaranteed. PORTFOLIO COMPOSITION PORTFOLIO STRUCTURE (u) Commercial Paper 87.7% Certificates of Deposit 7.5% Repurchase Agreements 5.1% Other Assets Less Liabilities -0.3% SHORT TERM CREDIT QUALITY (q) Average Credit Quality Short-Term Bonds (a) A-1 ------------------------------------------------ All holdings are rated A-1 MATURITY BREAKDOWN (u) 0-29 days 37.8% ------------------------------------------------ 30-59 days 39.5% ------------------------------------------------ 60-89 days 19.0% ------------------------------------------------ 90-366 days 4.0% ------------------------------------------------ Other Assets Less Liabilities -0.3% ------------------------------------------------ (a) The average credit quality is based upon a market weighted average of portfolio holdings that are rated by public rating agencies. (q) Each security is assigned a rating from Moody's Investors Service. If not rated by Moody's, the rating will be that assigned by Standard & Poor's. Likewise, if not assigned a rating by Standard & Poor's, it will be based on the rating assigned by Fitch, Inc. If not rated by any of the three agencies, the security is considered Not Rated. U.S. Treasuries and U.S. Agency securities are included in the "A-1"-rating category. Percentages are based on the total market value of investments as of 8/31/06. (u) For purposes of this graphical presentation, accrued interest, where applicable, is included. From time to time "Other Assets Less Liabilities" may be negative due to timing of cash receipts. Percentages are based on net assets as of 8/31/06. The portfolio is actively managed and current holdings may be different. PERFORMANCE SUMMARY THROUGH 8/31/06 Total returns as well as the current 7-day yield have been provided for the applicable time periods. Performance results reflect the percentage change in net asset value, including there investment of any dividends and capital gains distributions. (See Notes to Performance Summary.) An investment in the portfolio is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Although the portfolio seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the portfolio. PERFORMANCE DATA SHOWN REPRESENTS PAST PERFORMANCE AND IS NO GUARANTEE OF FUTURE RESULTS. INVESTMENT RETURN AND PRINCIPAL VALUE FLUCTUATE SO YOUR SHARES, WHEN SOLD, MAY BE WORTH MORE OR LESS THAN THE ORIGINAL COST; CURRENT PERFORMANCE MAY BE LOWER OR HIGHER THAN QUOTED. FOR MOST RECENT MONTH-END PERFORMANCE, PLEASE VISIT MFS.COM. THE PERFORMANCE SHOWN DOES NOT REFLECT THE DEDUCTION OF TAXES, IF ANY, THAT A SHAREHOLDER WOULD PAY ON FUND DISTRIBUTIONS OR THE REDEMPTION OF FUND SHARES. 1 YEAR TOTAL RETURN CURRENT (WITHOUT CURRENT 7-DAY YIELD CLASS INCEPTION SALES CHARGE) 7-DAY YIELD WITHOUT WAIVER - -------------------------------------------------------------------------------- A 9/07/93 4.19% 5.02% 4.62% - -------------------------------------------------------------------------------- B 12/29/86 3.16% 4.02% 3.62% - -------------------------------------------------------------------------------- C 4/01/96 3.15% 4.02% 3.62% - -------------------------------------------------------------------------------- R1 4/01/05 3.04% 3.92% 3.42% - -------------------------------------------------------------------------------- R2 4/01/05 3.40% 4.26% 3.71% - -------------------------------------------------------------------------------- R3 4/01/05 3.51% 4.37% 3.87% - -------------------------------------------------------------------------------- R4 4/01/05 3.77% 4.59% 4.19% - -------------------------------------------------------------------------------- R5 4/01/05 4.09% 4.92% 4.52% - -------------------------------------------------------------------------------- 529A 7/31/02 3.93% 4.77% 4.02% - -------------------------------------------------------------------------------- 529B 7/31/02 2.90% 3.79% 3.39% - -------------------------------------------------------------------------------- 529C 7/31/02 2.90% 3.77% 3.37% - -------------------------------------------------------------------------------- Yields quoted are based on the latest seven days ended as of August 31, 2006, with dividends annualized. The yield quotation more closely reflects the current earnings of the fund than the total return quotation. 1 YEAR TOTAL RETURN (WITH CLASS SALES CHARGE) - -------------------------------------------------------------------------------- B -0.84% - -------------------------------------------------------------------------------- C 2.15% - -------------------------------------------------------------------------------- 529B -1.10% - -------------------------------------------------------------------------------- 529C 1.90% - -------------------------------------------------------------------------------- NOTES TO PERFORMANCE SUMMARY Class A and 529A shares have no sales charge. Class B and 529B results, including sales charge, reflect the deduction of the applicable contingent deferred sales charge (CDSC), which declines over six years from 4% to 0%. Class C and 529C results, including sales charge (assuming redemption within one year from the end of the calendar month of purchase), reflect the deduction of the 1% CDSC. Class R1, R2, R3, R4, and R5 shares have no initial sales charge or CDSC and are only available to certain retirement plans. Class 529 shares are only available in conjunction with qualified tuition programs, such as the MFS 529 Savings Plan. There also is an additional annual fee, which is detailed in the program description, on qualified tuition programs. If this fee was reflected, the performance for Class 529 shares would have been lower. This annual fee is waived for Oregon residents and for those accounts with assets of $25,000 or more. Performance for Classes R4, R5, and 529A shares includes the performance of the fund's Class A shares for periods prior to their offering. Performance for Classes R1, R2, R3, and 529B shares includes the performance of the fund's Class B shares for periods prior to their offering. Performance for Class 529C shares includes the performance of the fund's Class C shares for periods prior to their offering. For reporting periods ending prior to March 31, 2004, when quoting performance for the fund's Class 529A shares, the performance of these share classes included the performance of the fund's Class B shares, rather than Class A shares. The blending methodology changed for reporting periods ending on or after March 31, 2004, because Class A shares now has a 10 year performance history, and share class performance is being blended to Class A shares based upon the similarity of share class operating expenses. This change in blending methodology results in better performance for Class 529A shares than it had under the prior blending methodology. For a transitional period lasting until December 31, 2007, performance for Class 529A shares under the prior methodology is available at mfs.com. This blended class performance has been adjusted to take into account differences in sales loads, if any, applicable to these share classes, but has not been adjusted to take into account differences in class specific operating expenses (such as Rule 12b-1 fees). Compared to performance these share classes would have experienced had they been offered for the entire period, the use of blended performance generally results in higher performance for share classes with higher operating expenses than the share class to which it is blended, and lower performance for share classes with lower operating expenses than the share class to which it is blended. Performance results reflect any applicable expense subsidies and waivers in effect during the periods shown. Without such subsidies and waivers the fund's performance results would be less favorable. Please see the prospectus and financial statements for complete details. EXPENSE TABLE Fund expenses borne by the shareholders during the period, March 1, 2006 through August 31, 2006. As a shareholder of the fund, you incur two types of costs: (1) transaction costs, including sales charges (loads) on certain purchase or redemption payments and redemption fees on certain exchanges and redemptions, and (2) ongoing costs, including management fees; distribution and service (12b-1) fees; and other fund expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in the fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period March 1, 2006 through August 31, 2006. ACTUAL EXPENSES The first line for each share class in the following table provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number in the first line under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. HYPOTHETICAL EXAMPLE FOR COMPARISON PURPOSES The second line for each share class in the following table provides information about hypothetical account values and hypothetical expenses based on the fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs, such as sales charges (loads) or redemption fees. Therefore, the second line for each share class in the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher. - ------------------------------------------------------------------------------- Expenses Paid During Annualized Beginning Ending Period(p) Share Expense Account Value Account Value 3/01/06- Class Ratio 3/01/06 8/31/06 8/31/06 - -------------------------------------------------------------------------------- Actual 0.47% $1,000.00 $1,023.30 $2.40 A ------------------------------------------------------------------------- Hypothetical (h) 0.47% $1,000.00 $1,022.84 $2.40 - -------------------------------------------------------------------------------- Actual 1.47% $1,000.00 $1,018.20 $7.48 B ------------------------------------------------------------------------- Hypothetical (h) 1.47% $1,000.00 $1,017.80 $7.48 - -------------------------------------------------------------------------------- Actual 1.47% $1,000.00 $1,018.20 $7.48 C ------------------------------------------------------------------------- Hypothetical (h) 1.47% $1,000.00 $1,017.80 $7.48 - -------------------------------------------------------------------------------- Actual 1.57% $1,000.00 $1,017.70 $7.98 R1 ------------------------------------------------------------------------- Hypothetical (h) 1.57% $1,000.00 $1,017.29 $7.98 - -------------------------------------------------------------------------------- Actual 1.22% $1,000.00 $1,019.50 $6.21 R2 ------------------------------------------------------------------------- Hypothetical (h) 1.22% $1,000.00 $1,019.06 $6.21 - -------------------------------------------------------------------------------- Actual 1.11% $1,000.00 $1,020.00 $5.65 R3 ------------------------------------------------------------------------- Hypothetical (h) 1.11% $1,000.00 $1,019.61 $5.65 - -------------------------------------------------------------------------------- Actual 0.86% $1,000.00 $1,021.30 $4.38 R4 ------------------------------------------------------------------------- Hypothetical (h) 0.86% $1,000.00 $1,020.87 $4.38 - -------------------------------------------------------------------------------- Actual 0.57% $1,000.00 $1,022.80 $2.91 R5 ------------------------------------------------------------------------- Hypothetical (h) 0.57% $1,000.00 $1,022.33 $2.91 - -------------------------------------------------------------------------------- Actual 0.72% $1,000.00 $1,022.10 $3.67 529A ------------------------------------------------------------------------- Hypothetical (h) 0.72% $1,000.00 $1,021.58 $3.67 - -------------------------------------------------------------------------------- Actual 1.72% $1,000.00 $1,017.00 $8.74 529B ------------------------------------------------------------------------- Hypothetical (h) 1.72% $1,000.00 $1,016.53 $8.74 - -------------------------------------------------------------------------------- Actual 1.72% $1,000.00 $1,016.90 $8.74 529C ------------------------------------------------------------------------- Hypothetical (h) 1.72% $1,000.00 $1,016.53 $8.74 - -------------------------------------------------------------------------------- (h) 5% class return per year before expenses. (p) Expenses paid is equal to each class' annualized expense ratio, as shown above, multiplied by the average account value over the period, multiplied by the number of days in the period, divided by the number of days in the year. Expenses paid do not include any applicable sales charges (loads) or redemption fees. If these transaction costs had been included, your costs would have been higher. PORTFOLIO OF INVESTMENTS 8/31/06 The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes. Certificates of Deposit - 7.4% - --------------------------------------------------------------------------------------------------------- ISSUER SHARES/PAR VALUE ($) - --------------------------------------------------------------------------------------------------------- Other Banks & Diversified Financials - 7.4% - --------------------------------------------------------------------------------------------------------- Barclays Bank PLC, NY, 5.45%, due 10/25/06 $ 15,269,000 $ 15,269,000 Credit Suisse, NY, 4.985%, due 9/13/06 14,618,000 14,618,000 - --------------------------------------------------------------------------------------------------------- TOTAL CERTIFICATES OF DEPOSIT, AT AMORTIZED COST AND VALUE $ 29,887,000 - --------------------------------------------------------------------------------------------------------- Commercial Paper - 87.7% (y) - --------------------------------------------------------------------------------------------------------- Asset Backed & Securitized - 4.2% - --------------------------------------------------------------------------------------------------------- Yorktown Capital LLC, 5.3%, due 9/07/06 (t) $ 16,896,000 $ 16,881,075 - --------------------------------------------------------------------------------------------------------- Automotive - 4.1% - --------------------------------------------------------------------------------------------------------- Toyota Motor Credit Corp., 5.37%, due 10/12/06 $ 16,766,000 $ 16,663,462 - --------------------------------------------------------------------------------------------------------- Financial Institutions - 47.7% - --------------------------------------------------------------------------------------------------------- CRC Funding LLC, 5.35%, due 10/05/06 (t) $ 2,701,000 $ 2,687,352 Ciesco LLC, 5.34%, due 10/05/06 (t) 12,183,000 12,121,557 Citibank Credit Card Issuance Trust, 5.38%, due 9/18/06 (t) 10,000,000 9,974,594 Edison Asset Securitization LLC, 5.27%, due 11/21/06 (t) 16,520,000 16,324,114 FCAR Owner Trust, 5.26%, due 9/22/06 16,351,000 16,300,830 Fairway Finance Corp., 5.31%, due 11/20/06 (t) 17,083,000 16,881,421 Falcon Asset Securitization Corp., 5.26%, due 10/19/06 (t) 7,013,000 6,963,815 General Electric Capital Corp., 5.38%, due 10/26/06 2,140,000 2,122,410 General Electric Capital Corp., 5.37%, due 11/27/06 14,874,000 14,680,973 Govco, Inc., 5.39%, due 10/12/06 (t) 16,708,000 16,605,436 Jupiter Securitization Corp., 5.27%, due 9/13/06 (t) 3,564,000 3,557,739 Jupiter Securitization Corp., 5.26%, due 10/11/06 (t) 2,000,000 1,988,311 Kitty Hawk Funding Corp., 5.34%, due 9/15/06 (t) 9,141,000 9,122,017 Old Line Funding LLC, 5.36%, due 9/11/06 (t) 9,380,000 9,366,034 Old Line Funding LLC, 5.35%, due 9/15/06 (t) 3,995,000 3,986,688 Ranger Funding Co. LLC, 5.26%, due 9/11/06 (t) 16,356,000 16,332,103 Scaldis Capital LLC, 5.38%, due 10/13/06 (t) 11,001,000 10,931,950 Scaldis Capital LLC, 5.275%, due 11/27/06 (t) 2,562,000 2,529,340 Scaldis Capital LLC, 5.4%, due 11/27/06 (t) 2,877,000 2,839,455 Thunder Bay Funding LLC, 5.36%, due 9/11/06 - 10/30/06 (t) 16,978,000 16,890,279 Windmill Funding Corp., 5.26%, due 10/10/06 (t) 917,000 911,775 ------------- $ 193,118,193 - --------------------------------------------------------------------------------------------------------- Insurance - 4.2% - --------------------------------------------------------------------------------------------------------- MetLife, Inc., 5.34%, due 10/02/06 (t) $ 16,967,000 $ 16,888,980 - --------------------------------------------------------------------------------------------------------- Other Banks & Diversified Financials - 27.5% - --------------------------------------------------------------------------------------------------------- Abbey National North America LLC, 5.25%, due 12/27/06 $ 16,584,000 $ 16,301,036 Citigroup Funding, Inc., 5.31%, due 10/06/06 16,933,000 16,845,583 Deutsche Bank Financial LLC, 5.25%, due 9/22/06 16,415,000 16,364,729 Dexia Delaware LLC, 5.265%, due 10/10/06 16,634,000 16,539,124 HBOS Treasury Services PLC, 5.39%, due 9/29/06 7,000,000 6,970,654 HBOS Treasury Services PLC, 5.32%, due 11/07/06 7,540,000 7,465,346 Societe Generale North America, 5.34%, due 11/01/06 16,453,000 16,304,128 Svenska Handelsbanken Inc., 5.03%, due 10/23/06 14,842,000 14,734,165 ------------- $ 111,524,765 - --------------------------------------------------------------------------------------------------------- TOTAL COMMERCIAL PAPER, AT AMORTIZED COST AND VALUE $ 355,076,475 - --------------------------------------------------------------------------------------------------------- Repurchase Agreements - 5.1% - --------------------------------------------------------------------------------------------------------- Merrill Lynch & Co., 5.28%, dated 8/31/06, total to be received $20,490,005 (secured by U.S. Treasury and Federal Agency obligations and Mortgage Backed Securities in a jointly traded account), at Cost $ 20,487,000 $ 20,487,000 - --------------------------------------------------------------------------------------------------------- TOTAL INVESTMENTS, AT AMORTIZED COST AND VALUE $ 405,450,475 - --------------------------------------------------------------------------------------------------------- Other Assets, Less Liabilities - (0.2)% (750,790) - --------------------------------------------------------------------------------------------------------- NET ASSETS - 100.0% $ 404,699,685 - --------------------------------------------------------------------------------------------------------- (t) Security exempt from registration with the U.S. Securities and Exchange Commission under Section 4(2) of the Securities Act of 1933. (y) The rate shown represents an annualized yield at time of purchase. SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENT OF ASSETS AND LIABILITIES At 8/31/06 This statement represents your fund's balance sheet, which details the assets and liabilities comprising the total value of the fund. ASSETS - ------------------------------------------------------------------------------------------------------ Investments, at amortized cost and value $405,450,475 Cash 889 Receivable for fund shares sold 1,095,329 Interest receivable 430,907 Other assets 2,404 - ------------------------------------------------------------------------------------------------------ Total assets $406,980,004 - ------------------------------------------------------------------------------------------------------ LIABILITIES - ------------------------------------------------------------------------------------------------------ Distributions payable $57,156 Payable for fund shares reacquired 1,892,026 Payable to affiliates Management fee 3,329 Shareholder servicing costs 109,918 Distribution and service fees 15,621 Administrative services fee 436 Program manager fees 43 Retirement plan administration and services fees 82 Payable for independent trustees' compensation 30,631 Accrued expenses and other liabilities 171,077 - ------------------------------------------------------------------------------------------------------ Total liabilities $2,280,319 - ------------------------------------------------------------------------------------------------------ Net assets $404,699,685 - ------------------------------------------------------------------------------------------------------ NET ASSETS CONSIST OF - ------------------------------------------------------------------------------------------------------ Paid-in-capital $404,653,395 Accumulated net realized gain (loss) on investments (1,256) Undistributed net investment income 47,546 - ------------------------------------------------------------------------------------------------------ Net assets $404,699,685 - ------------------------------------------------------------------------------------------------------ Shares of beneficial interest outstanding 404,653,410 - ------------------------------------------------------------------------------------------------------ Class A shares - ------------------------------------------------------------------------------------------------------ Net assets $114,481,036 Shares outstanding 114,468,776 - ------------------------------------------------------------------------------------------------------ Net asset value, offering price and redemption price per share $1.00 - ------------------------------------------------------------------------------------------------------ Class B shares - ------------------------------------------------------------------------------------------------------ Net assets $222,661,285 Shares outstanding 222,633,968 - ------------------------------------------------------------------------------------------------------ Net asset value and offering price per share $1.00 - ------------------------------------------------------------------------------------------------------ Statement of Assets and Liabilities - continued Class C shares - ------------------------------------------------------------------------------------------------------ Net assets $56,456,050 Shares outstanding 56,450,447 - ------------------------------------------------------------------------------------------------------ Net asset value and offering price per share $1.00 - ------------------------------------------------------------------------------------------------------ Class R1 shares - ------------------------------------------------------------------------------------------------------ Net assets $898,297 Shares outstanding 898,197 - ------------------------------------------------------------------------------------------------------ Net asset value, offering price, and redemption price per share $1.00 - ------------------------------------------------------------------------------------------------------ Class R2 shares - ------------------------------------------------------------------------------------------------------ Net assets $1,100,647 Shares outstanding 1,100,543 - ------------------------------------------------------------------------------------------------------ Net asset value, offering price, and redemption price per share $1.00 - ------------------------------------------------------------------------------------------------------ Class R3 shares - ------------------------------------------------------------------------------------------------------ Net assets $4,909,311 Shares outstanding 4,908,802 - ------------------------------------------------------------------------------------------------------ Net asset value, offering price, and redemption price per share $1.00 - ------------------------------------------------------------------------------------------------------ Class R4 shares - ------------------------------------------------------------------------------------------------------ Net assets $1,019,463 Shares outstanding 1,019,432 - ------------------------------------------------------------------------------------------------------ Net asset value, offering price, and redemption price per share $1.00 - ------------------------------------------------------------------------------------------------------ Class R5 shares - ------------------------------------------------------------------------------------------------------ Net assets $52,600 Shares outstanding 52,594 - ------------------------------------------------------------------------------------------------------ Net asset value, offering price, and redemption price per share $1.00 - ------------------------------------------------------------------------------------------------------ Class 529A shares - ------------------------------------------------------------------------------------------------------ Net assets $2,135,489 Shares outstanding 2,135,263 - ------------------------------------------------------------------------------------------------------ Net asset value, offering price and redemption price per share $1.00 - ------------------------------------------------------------------------------------------------------ Class 529B shares - ------------------------------------------------------------------------------------------------------ Net assets $297,337 Shares outstanding 297,290 - ------------------------------------------------------------------------------------------------------ Net asset value and offering price per share $1.00 - ------------------------------------------------------------------------------------------------------ Class 529C shares - ------------------------------------------------------------------------------------------------------ Net assets $688,170 Shares outstanding 688,098 - ------------------------------------------------------------------------------------------------------ Net asset value and offering price per share $1.00 - ------------------------------------------------------------------------------------------------------ A contingent deferred sales charge may be imposed on redemptions of Class B, Class C, Class 529B, and Class 529C shares. SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENT OF OPERATIONS Year ended 8/31/06 This statement describes how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations. NET INVESTMENT INCOME - ------------------------------------------------------------------------------------------------------ Interest income $18,263,307 - ------------------------------------------------------------------------------------------------------ Expenses Management fee $2,188,398 Distribution and service fees 2,938,180 Program manager fees 6,858 Shareholder servicing costs 863,607 Administrative services fee 61,569 Retirement plan administration and services fees 14,166 Independent trustees' compensation 17,064 Custodian fee 108,240 Shareholder communications 73,396 Auditing fees 31,160 Legal fees 7,458 Miscellaneous 186,594 - ------------------------------------------------------------------------------------------------------ Total expenses $6,496,690 - ------------------------------------------------------------------------------------------------------ Fees paid indirectly (33,877) Reduction of expenses by investment adviser and distributor (1,604,756) - ------------------------------------------------------------------------------------------------------ Net expenses $4,858,057 - ------------------------------------------------------------------------------------------------------ Net investment income $13,405,250 - ------------------------------------------------------------------------------------------------------ Net realized gain (loss) on investment transactions $(811) - ------------------------------------------------------------------------------------------------------ Change in net assets from operations $13,404,439 - ------------------------------------------------------------------------------------------------------ SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENTS OF CHANGES IN NET ASSETS These statements describe the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions. YEARS ENDED 8/31 ----------------------------------- 2006 2005 CHANGE IN NET ASSETS FROM OPERATIONS - ------------------------------------------------------------------------------------------------------- Net investment income $13,405,250 $6,156,757 Net realized gain (loss) on investments (811) -- - ------------------------------------------------------------------------------------------------------- Change in net assets from operations $13,404,439 $6,156,757 - ------------------------------------------------------------------------------------------------------- DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------- From net investment income Class A $(4,153,465) $(1,959,377) Class B (7,438,988) (3,531,863) Class C (1,500,901) (621,592) Class R1 (22,701) (532) Class R2 (30,414) (1,029) Class R3 (102,446) (2,891) Class R4 (9,619) (466) Class R5 (2,066) (528) Class 529A (70,775) (30,067) Class 529B (9,881) (3,064) Class 529C (16,893) (5,348) - ------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(13,358,149) $(6,156,757) - ------------------------------------------------------------------------------------------------------- Change in net assets from fund share transactions $(18,098,331) $(190,979,377) - ------------------------------------------------------------------------------------------------------- Total change in net assets $(18,052,041) $(190,979,377) - ------------------------------------------------------------------------------------------------------- NET ASSETS - ------------------------------------------------------------------------------------------------------- At beginning of period 422,751,726 613,731,103 At end of period (including undistributed net investment income of $47,546 and $445, respectively) $404,699,685 $422,751,726 - ------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Statements FINANCIAL HIGHLIGHTS The financial highlights table is intended to help you understand the fund's financial performance for the past 5 years (or life of a particular class, if shorter). Certain information reflects financial results for a single fund share. The total returns in the table represent the rate by which an investor would have earned (or lost) on an investment in the fund share class (assuming reinvestment of all distributions) held for the entire period. This information has been audited by the fund's independent registered public accounting firm, whose report, together with the fund's financial statements, are included in this report. CLASS A YEARS ENDED 8/31 -------------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $1.00 $1.00 $1.00 $1.00 $1.00 - ----------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ----------------------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.04 $0.02 $0.01 $0.01 $0.01 Net realized and unrealized gain (loss) on investments (0.00)(w) -- -- -- -- - ----------------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.04 $0.02 $0.01 $0.01 $0.01 - ----------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ----------------------------------------------------------------------------------------------------------------------------- From net investment income $(0.04) $(0.02) $(0.01) $(0.01) $(0.01) - ----------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $1.00 $1.00 $1.00 $1.00 $1.00 - ----------------------------------------------------------------------------------------------------------------------------- Total return (%) (r) 4.19 2.11 0.58 0.69 1.49 - ----------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ----------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 0.89 0.90 0.79 0.81 0.91 Expenses after expense reductions (f) 0.49 0.50 0.55 0.71 0.81 Net investment income 4.14 2.10 0.58 0.70 1.44 Net assets at end of period (000 Omitted) $114,481 $91,165 $101,287 $214,275 $242,230 - ----------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS B YEARS ENDED 8/31 ----------------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $1.00 $1.00 $1.00 $1.00 $1.00 - ---------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ---------------------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.03 $0.01 $0.00(w) $0.00(w) $0.00(w) Net realized and unrealized gain (loss) on investments (0.00)(w) -- -- -- -- - ---------------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.03 $0.01 $0.00(w) $0.00(w) $0.00(w) - ---------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ---------------------------------------------------------------------------------------------------------------------------- From net investment income $(0.03) $(0.01) $(0.00)(w) $(0.00)(w) $(0.00)(w) - ---------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $1.00 $1.00 $1.00 $1.00 $1.00 - ---------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(t) 3.16 1.10 0.06 0.06 0.49 - ---------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ---------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.89 1.89 1.80 1.81 1.91 Expenses after expense reductions (f) 1.49 1.49 1.07 1.35 1.81 Net investment income 3.09 1.03 0.06 0.06 0.50 Net assets at end of period (000 Omitted) $222,661 $280,361 $429,844 $647,269 $741,638 - ---------------------------------------------------------------------------------------------------------------------------- CLASS C YEARS ENDED 8/31 ----------------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $1.00 $1.00 $1.00 $1.00 $1.00 - ---------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ---------------------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.03 $0.01 $0.00(w) $0.00(w) $0.00(w) Net realized and unrealized gain (loss) on investments (0.00)(w) -- -- -- -- - ---------------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.03 $0.01 $0.00(w) $0.00(w) $0.00(w) - ---------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ---------------------------------------------------------------------------------------------------------------------------- From net investment income $(0.03) $(0.01) $(0.00)(w) $(0.00)(w) $(0.00)(w) - ---------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $1.00 $1.00 $1.00 $1.00 $1.00 - ---------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(t) 3.15 1.10 0.06 0.06 0.49 - ---------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ---------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.89 1.89 1.79 1.81 1.91 Expenses after expense reductions (f) 1.49 1.49 1.07 1.36 1.81 Net investment income 3.14 1.03 0.06 0.06 0.50 Net assets at end of period (000 Omitted) $56,456 $46,483 $80,482 $159,715 $159,254 - ---------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R1 YEARS ENDED 8/31 ------------------------------- 2006 2005(i) Net asset value, beginning of period $1.00 $1.00 - ------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.03 $0.01 Net realized and unrealized gain (loss) on investments (0.00)(w) -- - ------------------------------------------------------------------------------------------------------------- Total from investment operations $0.03 $0.01 - ------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------- From net investment income $(0.03) $(0.01) - ------------------------------------------------------------------------------------------------------------- Net asset value, end of period $1.00 $1.00 - ------------------------------------------------------------------------------------------------------------- Total return (%) (r) 3.04 0.59(n) - ------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.09 2.24(a) Expenses after expense reductions (f) 1.59 1.84(a) Net investment income 3.15 1.52(a) Net assets at end of period (000 Omitted) $898 $258 - ------------------------------------------------------------------------------------------------------------- CLASS R2 YEARS ENDED 8/31 ------------------------------- 2006 2005(i) Net asset value, beginning of period $1.00 $1.00 - ------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.03 $0.01 Net realized and unrealized gain (loss) on investments (0.00)(w) -- - ------------------------------------------------------------------------------------------------------------- Total from investment operations $0.03 $0.01 - ------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------- From net investment income $(0.03) $(0.01) - ------------------------------------------------------------------------------------------------------------- Net asset value, end of period $1.00 $1.00 - ------------------------------------------------------------------------------------------------------------- Total return (%) (r) 3.40 0.72(n) - ------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.79 1.93(a) Expenses after expense reductions (f) 1.25 1.53(a) Net investment income 3.40 1.97(a) Net assets at end of period (000 Omitted) $1,101 $604 - ------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R3 YEARS ENDED 8/31 ------------------------------- 2006 2005(i) Net asset value, beginning of period $1.00 $1.00 - ------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.04 $0.01 Net realized and unrealized gain (loss) on investments (0.01) -- - ------------------------------------------------------------------------------------------------------------- Total from investment operations $0.03 $0.01 - ------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------- From net investment income $(0.03) $(0.01) - ------------------------------------------------------------------------------------------------------------- Net asset value, end of period $1.00 $1.00 - ------------------------------------------------------------------------------------------------------------- Total return (%) (r) 3.51 0.78(n) - ------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.63 1.83(a) Expenses after expense reductions (f) 1.13 1.43(a) Net investment income 3.73 2.10(a) Net assets at end of period (000 Omitted) $4,909 $1,179 - ------------------------------------------------------------------------------------------------------------- CLASS R4 YEARS ENDED 8/31 ------------------------------- 2006 2005(i) Net asset value, beginning of period $1.00 $1.00 - ------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.04 $0.01 Net realized and unrealized gain (loss) on investments (0.00)(w) -- - ------------------------------------------------------------------------------------------------------------- Total from investment operations $0.04 $0.01 - ------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------- From net investment income $(0.04) $(0.01) - ------------------------------------------------------------------------------------------------------------- Net asset value, end of period $1.00 $1.00 - ------------------------------------------------------------------------------------------------------------- Total return (%) (r) 3.77 0.93(n) - ------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.28 1.38(a) Expenses after expense reductions (f) 0.88 0.98(a) Net investment income 4.06 2.21(a) Net assets at end of period (000 Omitted) $1,019 $51 - ------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R5 YEARS ENDED 8/31 ------------------------------- 2006 2005(i) Net asset value, beginning of period $1.00 $1.00 - ------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.04 $0.01 Net realized and unrealized gain (loss) on investments (0.00)(w) -- - ------------------------------------------------------------------------------------------------------------- Total from investment operations $0.04 $0.01 - ------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------- From net investment income $(0.04) $(0.01) - ------------------------------------------------------------------------------------------------------------- Net asset value, end of period $1.00 $1.00 - ------------------------------------------------------------------------------------------------------------- Total return (%) (r) 4.09 1.06(n) - ------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 0.99 1.08(a) Expenses after expense reductions (f) 0.59 0.68(a) Net investment income 4.03 2.51(a) Net assets at end of period (000 Omitted) $53 $51 - ------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS 529A YEARS ENDED 8/31 ------------------------------------------------------------------------------ 2006 2005 2004 2003 2002(i) Net asset value, beginning of period $1.00 $1.00 $1.00 $1.00 $1.00 - ----------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ----------------------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.04 $0.02 $0.00(w) $0.00(w) $0.00(w) Net realized and unrealized gain (loss) on investments (0.00)(w) -- -- -- -- - ----------------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.04 $0.02 $0.00(w) $0.00(w) $0.00(w) - ----------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ----------------------------------------------------------------------------------------------------------------------------- From net investment income $(0.04) $(0.02) $(0.00)(w) $(0.00)(w) $(0.00)(w) - ----------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $1.00 $1.00 $1.00 $1.00 $1.00 - ----------------------------------------------------------------------------------------------------------------------------- Total return (%) (r) 3.93 1.86 0.33 0.45 0.08(n) - ----------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ----------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.49 1.50 1.39 1.41 1.26(a) Expenses after expense reductions (f) 0.74 0.75 0.80 0.96 1.16(a) Net investment income 3.92 1.93 0.34 0.33 1.04(a) Net assets at end of period (000 Omitted) $2,135 $1,650 $1,140 $1,164 $30 - ----------------------------------------------------------------------------------------------------------------------------- CLASS 529B YEARS ENDED 8/31 ------------------------------------------------------------------------------ 2006 2005 2004 2003 2002(i) Net asset value, beginning of period $1.00 $1.00 $1.00 $1.00 $1.00 - ----------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ----------------------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.03 $0.01 $0.00(w) $0.00(w) $0.00(w) Net realized and unrealized gain (loss) on investments (0.00)(w) -- -- -- -- - ----------------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.03 $0.01 $0.00(w) $0.00(w) $0.00(w) - ----------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ----------------------------------------------------------------------------------------------------------------------------- From net investment income $(0.03) $(0.01) $(0.00)(w) $(0.00)(w) $(0.00)(w) - ----------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $1.00 $1.00 $1.00 $1.00 $1.00 - ----------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(t) 2.90 0.87 0.06 0.07 0.02(n) - ----------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ----------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.14 2.13 2.03 2.06 2.16(a) Expenses after expense reductions (f) 1.74 1.73 1.08 1.25 2.06(a) Net investment income 2.88 0.87 0.07 0.06 0.23(a) Net assets at end of period (000 Omitted) $297 $340 $339 $253 $5 - ----------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS 529C YEARS ENDED 8/31 ------------------------------------------------------------------------------ 2006 2005 2004 2003 2002(i) Net asset value, beginning of period $1.00 $1.00 $1.00 $1.00 $1.00 - ----------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ----------------------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.03 $0.01 $0.00(w) $0.00(w) $0.00(w) Net realized and unrealized gain (loss) on investments (0.00)(w) -- -- -- -- - ----------------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.03 $0.01 $0.00(w) $0.00(w) $0.00(w) - ----------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ----------------------------------------------------------------------------------------------------------------------------- From net investment income $(0.03) $(0.01) $(0.00)(w) $(0.00)(w) $(0.00)(w) - ----------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $1.00 $1.00 $1.00 $1.00 $1.00 - ----------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(t) 2.90 0.87 0.06 0.07 0.02(n) - ----------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ----------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.14 2.13 2.03 2.06 2.16(a) Expenses after expense reductions (f) 1.74 1.73 1.08 1.22 2.06(a) Net investment income 2.89 0.85 0.06 0.05 0.23(a) Net assets at end of period (000 Omitted) $688 $611 $640 $512 $5 - ----------------------------------------------------------------------------------------------------------------------------- (a) Annualized. (d) Per share data are based on average shares outstanding. (f) Ratios do not reflect reductions from fees paid indirectly. (i) For the period from the class' inception, July 31, 2002 (Classes 529A, 529B, and 529C), and April 1, 2005 (Classes R1, R2, R3, R4, and R5) through the stated period end. (n) Not annualized. (r) Certain expenses have been reduced without which performance would have been lower. (t) Total returns do not include any applicable sales charges. (w) Per share amount was less than $0.01. SEE NOTES TO FINANCIAL STATEMENTS NOTES TO FINANCIAL STATEMENTS (1) BUSINESS AND ORGANIZATION MFS Cash Reserve Fund (the fund) is a series of MFS Series Trust I (the trust). The trust is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open- end management investment company. (2) SIGNIFICANT ACCOUNTING POLICIES GENERAL - The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. INVESTMENT VALUATIONS - Money market instruments are valued at amortized cost, which approximates market value. Amortized cost involves valuing an instrument at its cost as adjusted for amortization of premium or accretion of discount rather than its current market value. Each money market fund's use of amortized cost is subject to the fund's compliance with Rule 2a-7 under the Investment Company Act of 1940. The amortized cost value of an instrument can be different from the market value of an instrument. REPURCHASE AGREEMENTS - The fund may enter into repurchase agreements with institutions that the fund's investment adviser has determined are creditworthy. Each repurchase agreement is recorded at cost. The fund requires that the securities collateral in a repurchase transaction be transferred to the custodian in a manner sufficient to enable the fund to obtain those securities in the event of a default under the repurchase agreement. The fund monitors, on a daily basis, the value of the collateral to ensure that its value, including accrued interest, is greater than amounts owed to the fund under each such repurchase agreement. The fund, along with other affiliated entities of Massachusetts Financial Services Company (MFS), may utilize a joint trading account for the purpose of entering into one or more repurchase agreements. INVESTMENT TRANSACTIONS AND INCOME - Investment transactions are recorded on the trade date. Interest income is recorded on the accrual basis. All premium and discount is amortized and accreted for financial statement purposes and tax reporting purposes in accordance with generally accepted accounting principles and federal tax regulations, respectively. FEES PAID INDIRECTLY - The fund's custody fee is reduced according to an arrangement that measures the value of cash deposited with the custodian by the fund. This amount, for the year ended August 31, 2006, is shown as a reduction of total expenses on the Statement of Operations. TAX MATTERS AND DISTRIBUTIONS - The fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable income, including realized capital gains. Accordingly, no provision for federal income tax is required in the financial statements. Foreign taxes, if any, have been accrued by the fund in the accompanying financial statements. Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future. Distributions in excess of net investment income or net realized gains are temporary overdistributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions for financial statement and tax purposes. During the year ended August 31, 2006, there were no significant adjustments due to differences between book and tax accounting. The tax character of distributions declared to shareholders is as follows: 8/31/06 8/31/05 Ordinary income (including any short-term capital gains) $13,358,149 $6,156,757 The federal tax cost and the tax basis components of distributable earnings were as follows: AS OF 8/31/06 Cost of investments $405,450,475 ---------------------------------------------------------- Undistributed ordinary income 134,730 Capital loss carryforwards (445) Post-October capital loss deferral (811) Other temporary differences (87,184) As of August 31, 2006, the fund had capital loss carryforwards available to offset future realized gains. Such losses expire as follows: 8/31/12 $(441) 8/31/13 (4) ---------------------------------------------------------- $(445) In June 2006, FASB Interpretation No. 48, Accounting for Uncertainty in Income Taxes (the "Interpretation") was issued, and is effective for fiscal years beginning after December 15, 2006 and is to be applied to all open tax years as of the effective date. This Interpretation prescribes a minimum threshold for financial statement recognition of the benefit of a tax position taken or expected to be taken in a tax return, and requires certain expanded disclosures. Management has recently begun to evaluate the application of the Interpretation to the fund, and has not at this time determined the impact, if any, resulting from the adoption of this Interpretation on the fund's financial statements. MULTIPLE CLASSES OF SHARES OF BENEFICIAL INTEREST - The fund offers multiple classes of shares, which differ in their respective distribution and service fees. All shareholders bear the common expenses of the fund based on the value of settled shares outstanding of each class, without distinction between share classes. Dividends are declared separately for each class. Differences in per share dividend rates are generally due to differences in separate class expenses. Class B and Class 529B shares will convert to Class A and Class 529A shares, respectively, approximately eight years after purchase. (3) TRANSACTIONS WITH AFFILIATES INVESTMENT ADVISER - The fund has an investment advisory agreement with MFS to provide overall investment management and related administrative services and facilities to the fund. The management fee is computed daily and paid monthly at an annual rate of 0.55% of the fund's average daily net assets. As part of a settlement agreement with the New York Attorney General concerning market timing and related matters, MFS has agreed to reduce the management fee to 0.15% of the fund's average daily net assets for the period March 1, 2004 through February 28, 2009. For the year ended August 31, 2006, this waiver amounted to $1,591,562 and is reflected as a reduction of total expenses in the Statement of Operations. The management fee incurred for the year ended August 31, 2006 was equivalent to an annual effective rate of 0.15% of the fund's average daily net assets. DISTRIBUTOR - The Board of Trustees has adopted a distribution plan for certain class shares pursuant to Rule 12b-1 of the Investment Company Act of 1940. The fund's distribution plan provides that the fund will pay MFD for services provided by MFD and financial intermediaries in connection with the distribution and servicing of certain share classes. One component of the plan is a distribution fee paid to MFD and another component of the plan is a service fee paid to MFD. MFD may subsequently pay all, or a portion, of the distribution and/or service fees to financial intermediaries. Distribution Fee Plan Table: TOTAL ANNUAL DISTRIBUTION DISTRIBUTION SERVICE DISTRIBUTION EFFECTIVE AND SERVICE FEE RATE FEE RATE PLAN(d) RATE(e) FEE Class A 0.10% 0.25% 0.35% 0.00% $-- Class B 0.75% 0.25% 1.00% 1.00% 2,418,268 Class C 0.75% 0.25% 1.00% 1.00% 479,917 Class R1 0.50% 0.25% 0.75% 0.75% 5,442 Class R2 0.25% 0.25% 0.50% 0.50% 4,484 Class R3 0.25% 0.25% 0.50% 0.50% 13,808 Class R4 -- 0.25% 0.25% 0.25% 596 Class 529A 0.25% 0.25% 0.50% 0.00% 6,336 Class 529B 0.75% 0.25% 1.00% 1.00% 3,451 Class 529C 0.75% 0.25% 1.00% 1.00% 5,878 - --------------------------------------------------------------------------------------------------------------------- Total Distribution and Service Fees $2,938,180 (d) In accordance with the distribution plan for certain classes, the fund pays distribution and/or service fees up to these annual percentage rates of each class' average daily net assets. (e) The annual effective rates represent actual fees incurred under the distribution plan for the year ended August 31, 2006 based on each class' average daily net assets. Payment of the 0.25% annual Class A service fee is not yet in effect and will be implemented on such date as the fund's Board of Trustees may determine. Payment of the 0.10% annual Class A distribution fee is not yet in effect and will be implemented on such date as the fund's Board of Trustees may determine. 0.10% of the Class 529A distribution fee is currently being waived under a written waiver arrangement through January 1, 2007. Payment of 0.15% of the Class 529A distribution fee is not yet in effect and will be implemented on such date as the fund's Board of Trustees may determine. For the year ended August 31, 2006, this waiver amounted to $1,810 and is reflected as a reduction of total expenses in the Statement of Operations. 0.25% of the Class 529A service fee is currently being waived under a written waiver arrangement through January 1, 2007. For the year ended August 31, 2006, this waiver amounted to $4,526 and is reflected as a reduction of total expenses in the Statement of Operations. Certain Class A, Class C and Class 529C shares are subject to a contingent deferred sales charge in the event of a shareholder redemption within 12 months of purchase. Class B and Class 529B shares are subject to a contingent deferred sales charge in the event of a shareholder redemption within six years of purchase. All contingent deferred sales charges are paid to MFD and during the year ended August 31, 2006, were as follows: AMOUNT Class A $150 Class B $784,801 Class C $19,028 Class 529B $597 Class 529C -- The fund has entered into and may from time to time enter into contracts with program managers and other parties which administer the tuition programs through which an investment in the fund's 529 share classes is made. The fund has entered into an agreement with MFD pursuant to which MFD receives an annual fee of up to 0.35% of the average daily net assets attributable to each 529 share class. The fee is based on average daily net assets and is currently established at 0.25% annually of average daily net assets of the fund's 529 share classes. The fee may only be increased with the approval of the Board of Trustees who oversees the fund. The services provided by MFD, or a third party with which MFD contracts, include recordkeeping and tax reporting and account services, as well as services designed to maintain the program's compliance with the Internal Revenue Code and other regulatory requirements. Program manager fees for the year ended August 31, 2006, were as follows: AMOUNT Class 529A $4,526 Class 529B 863 Class 529C 1,469 -------------------------------------------------- Total Program Manager Fees $6,858 SHAREHOLDER SERVICING AGENT - MFS Service Center, Inc. (MFSC), a wholly-owned subsidiary of MFS, receives a fee from the fund for its services as shareholder servicing agent calculated as a percentage of the average net assets of the fund as determined periodically under the supervision of the fund's Board of Trustees. For the year ended August 31, 2006, the fee was $389,024, which equated to 0.0978% annually of the fund's average daily net assets. MFSC also receives payment from the fund for out-of-pocket and sub- accounting expenses paid by MFSC on behalf of the fund. For the year ended August 31, 2006, these costs amounted to $224,285. The fund may also pay shareholder servicing related costs to non-related parties. ADMINISTRATOR - MFS provides certain financial, legal, shareholder communications, compliance, and other administrative services to the fund. Under an administrative services agreement, the fund partially reimburses MFS the costs incurred to provide these services. The fund is charged a fixed amount plus a fee based on calendar year average net assets. From July 1, 2005 through March 31, 2006, the fund's annual fixed amount was $10,000. Effective April 1, 2006, the fund's annual fixed amount is $17,500. The administrative services fee incurred for the year ended August 31, 2006 was equivalent to an annual effective rate of 0.0155% of the fund's average daily net assets. In addition to the administrative services provided by MFS to the fund as described above, MFS is responsible for providing certain retirement plan administration and services with respect to certain shares. These services include various administrative, recordkeeping, and communication/educational services with respect to the retirement plans which invest in these shares, and may be provided directly by MFS or by a third party. MFS may subsequently pay all, or a portion, of the retirement plan administration and services fee to affiliated or unaffiliated third parties. For the year ended August 31, 2006, the fund paid MFS an annual retirement plan administration and services fee up to the following annual percentage rates of each class' average daily net assets: ANNUAL EFFECTIVE TOTAL FEE RATE RATE(g) AMOUNT Class R1 0.45% 0.35% $3,265 Class R2 0.40% 0.26% 3,587 Class R3 0.25% 0.15% 6,905 Class R4 0.15% 0.15% 358 Class R5 0.10% 0.10% 51 - -------------------------------------------------------------------------- Total Retirement Plan Administration and Services Fees $14,166 (g) Effective October 1, 2005, MFS has contractually agreed to waive a portion of the retirement plan administration and services fee equal to 0.10% for Class R1 shares, 0.15% for Class R2 shares, and 0.10% for Class R3 shares. This agreement will continue until at least September 30, 2008. For the year ended August 31, 2006 this waiver amounted to $4,609 and is reflected as a reduction of total expenses in the Statement of Operations. TRUSTEES' AND OFFICERS' COMPENSATION - The fund pays compensation to Independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. The fund does not pay compensation directly to Trustees or officers of the fund who are also officers of the investment adviser, all of whom receive remuneration for their services to the fund from MFS. Certain officers and Trustees of the fund are officers or directors of MFS, MFD, and MFSC. The fund has an unfunded, defined benefit plan for certain retired Independent Trustees which resulted in a pension expense of $5,204. This amount is included in Independent trustees' compensation for the year ended August 31, 2006. The deferred liability for retirement benefits payable to certain retired Trustees amounted to $30,528 at August 31, 2006, and is included in payable for independent trustees' compensation. OTHER - This fund and certain other MFS funds (the funds) have entered into a services agreement (the Agreement) which provides for payment of fees by the funds to Tarantino LLC in return for the provision of services of an Independent Chief Compliance Officer (ICCO) for the funds. The ICCO is an officer of the funds and the sole member of Tarantino LLC. The funds can terminate the Agreement with Tarantino LLC at any time under the terms of the Agreement. For the year ended August 31, 2006, the fee paid to Tarantino LLC was $2,765. MFS has agreed to reimburse the fund for a portion of the payments made by the funds to Tarantino LLC in the amount of $2,249, which is shown as a reduction of total expenses in the Statement of Operations. Additionally, MFS has agreed to bear all expenses associated with office space, other administrative support, and supplies provided to the ICCO. (4) PORTFOLIO SECURITIES Purchases and sales of money market investments, exclusive of securities subject to repurchase agreements, aggregated $7,354,182,749 and $7,432,650,994, respectively. (5) SHARES OF BENEFICIAL INTEREST The fund's Declaration of Trust permits the Trustees to issue an unlimited number of full and fractional shares of beneficial interest. Transactions in fund shares were as follows: YEAR ENDED YEAR ENDED 8/31/06 8/31/05(i) SHARES AMOUNT SHARES AMOUNT Shares sold Class A 117,033,867 $117,033,876 104,034,506 $104,034,506 Class B 172,309,994 172,309,994 176,379,353 176,379,353 Class C 66,947,131 66,947,131 63,564,664 63,564,664 Class R1 1,313,341 1,313,341 258,123 258,123 Class R2 861,517 861,516 602,796 602,796 Class R3 6,796,745 6,796,746 1,396,398 1,396,398 Class R4 1,072,464 1,072,464 50,351 50,351 Class R5 -- -- 50,000 50,000 Class 529A 886,031 886,031 1,245,514 1,245,514 Class 529B 243,462 243,463 34,497 34,497 Class 529C 366,108 366,108 228,402 228,402 - ---------------------------------------------------------------------------------------------------------- 367,830,660 $367,830,670 347,844,604 $347,844,604 Shares issued to shareholders in reinvestment of distributions Class A 3,783,600 $3,783,600 1,774,925 $1,774,925 Class B 6,929,081 6,929,081 3,276,541 3,276,541 Class C 1,374,977 1,374,977 565,746 565,746 Class R1 22,173 22,174 532 532 Class R2 29,955 29,955 1,030 1,030 Class R3 99,631 99,631 2,853 2,853 Class R4 9,521 9,521 465 465 Class R5 2,066 2,066 528 528 Class 529A 70,755 70,755 29,689 29,689 Class 529B 9,850 9,850 3,062 3,062 Class 529C 16,827 16,827 5,296 5,296 - ---------------------------------------------------------------------------------------------------------- 12,348,436 $12,348,437 5,660,667 $5,660,667 Shares reacquired Class A (97,513,708) $(97,513,708) (115,931,387) $(115,931,387) Class B (236,966,151) (236,966,174) (329,138,495) (329,138,495) Class C (58,354,458) (58,354,459) (98,129,128) (98,129,128) Class R1 (695,487) (695,487) (485) (485) Class R2 (394,730) (394,730) (25) (25) Class R3 (3,166,655) (3,166,655) (220,170) (220,170) Class R4 (113,123) (113,123) (246) (246) Class 529A (471,603) (471,603) (764,907) (764,907) Class 529B (296,083) (296,084) (36,419) (36,419) Class 529C (305,414) (305,415) (263,386) (263,386) - ---------------------------------------------------------------------------------------------------------- (398,277,412) $(398,277,438) (544,484,648) $(544,484,648) Net change Class A 23,303,759 $23,303,768 (10,121,956) $(10,121,956) Class B (57,727,076) (57,727,099) (149,482,601) (149,482,601) Class C 9,967,650 9,967,649 (33,998,718) (33,998,718) Class R1 640,027 640,028 258,170 258,170 Class R2 496,742 496,741 603,801 603,801 Class R3 3,729,721 3,729,722 1,179,081 1,179,081 Class R4 968,862 968,862 50,570 50,570 Class R5 2,066 2,066 50,528 50,528 Class 529A 485,183 485,183 510,296 510,296 Class 529B (42,771) (42,771) 1,140 1,140 Class 529C 77,521 77,520 (29,688) (29,688) - ---------------------------------------------------------------------------------------------------------- (18,098,316) $(18,098,331) (190,979,377) $(190,979,377) (i) For the period from the class' inception, April 1, 2005 (Classes R1, R2, R3, R4, and R5), through the stated period end. (6) LINE OF CREDIT The fund and other affiliated funds participate in a $1 billion unsecured committed line of credit provided by a syndication of banks under a credit agreement. In addition, the fund and other affiliated funds have established uncommitted borrowing arrangements with certain banks. Borrowings may be made for temporary financing needs. Interest is charged to each fund, based on its borrowings, generally at a rate equal to the Federal Reserve funds rate plus 0.35%. In addition, a commitment fee, based on the average daily, unused portion of the committed line of credit, is allocated among the participating funds at the end of each calendar quarter. For the year ended August 31, 2006, the fund's commitment fee and interest expense were $1,750 and $0, respectively, and are included in miscellaneous expense on the Statement of Operations. REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM To The Trustees of MFS Series Trust I and the Shareholders of MFS Cash Reserve Fund: We have audited the accompanying statement of assets and liabilities, including the portfolio of investments, of MFS Cash Reserve Fund (one of the portfolios comprising MFS Series Trust I) (the "Trust") as of August 31, 2006, and the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended, and the financial highlights for each of the five years in the period then ended. These financial statements and financial highlights are the responsibility of the Trust's management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. The Trust is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Trust's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of August 31, 2006, by correspondence with the custodian. We believe that our audits provide a reasonable basis for our opinion. In our opinion, such financial statements and financial highlights present fairly, in all material respects, the financial position of MFS Cash Reserve Fund as of August 31, 2006, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended, and its financial highlights for each of the five years in the period then ended, in conformity with accounting principles generally accepted in the United States of America. DELOITTE & TOUCHE LLP Boston, Massachusetts October 20, 2006 TRUSTEES AND OFFICERS -- IDENTIFICATION AND BACKGROUND The Trustees and officers of the Trust, as of October 1, 2006, are listed below, together with their principal occupations during the past five years. (Their titles may have varied during that period.) The address of each Trustee and officer is 500 Boylston Street, Boston, Massachusetts 02116. PRINCIPAL OCCUPATIONS DURING POSITION(s) HELD TRUSTEE/OFFICER THE PAST FIVE YEARS & NAME, DATE OF BIRTH WITH FUND SINCE(h) OTHER DIRECTORSHIPS(j) - ------------------- ---------------- --------------- ---------------------------- INTERESTED TRUSTEES Robert J. Manning(k) Trustee February 2004 Massachusetts Financial Services (born 10/20/63) Company, Chief Executive Officer, President, Chief Investment Officer and Director Robert C. Pozen(k) Trustee February 2004 Massachusetts Financial Services (born 8/08/46) Company, Chairman (since February 2004); Secretary of Economic Affairs, The Commonwealth of Massachusetts (January 2002 to December 2002); Fidelity Investments, Vice Chairman (June 2000 to December 2001); Fidelity Management & Research Company (investment adviser), President (March 1997 to July 2001); Bell Canada Enterprises (telecommunications), Director; Medtronic, Inc. (medical technology), Director; Telesat (satellite communications), Director INDEPENDENT TRUSTEES J. Atwood Ives Trustee and Chair February 1992 Private investor; Eastern (born 5/01/36) of Trustees Enterprises (diversified services company), Chairman, Trustee and Chief Executive Officer (until November 2000) Robert E. Butler(n) Trustee January 2006 Consultant - regulatory and (born 11/29/41) compliance matters (since July 2002); PricewaterhouseCoopers LLP (professional services firm), Partner (November 2000 until June 2002) Lawrence H. Cohn, M.D. Trustee August 1993 Brigham and Women's Hospital, (born 3/11/37) Senior Cardiac Surgeon, Chief of Cardiac Surgery (until 2005); Harvard Medical School, Professor of Surgery; Brigham and Women's Hospital Physicians' Organization, Chair (2000 to 2004) David H. Gunning Trustee January 2004 Cleveland-Cliffs Inc. (mining (born 5/30/42) products and service provider), Vice Chairman/Director (since April 2001); Encinitos Ventures (private investment company), Principal (1997 to April 2001); Lincoln Electric Holdings, Inc. (welding equipment manufacturer), Director William R. Gutow Trustee December 1993 Private investor and real estate (born 9/27/41) consultant; Capitol Entertainment Management Company (video franchise), Vice Chairman Michael Hegarty Trustee December 2004 Retired; AXA Financial (financial (born 12/21/44) services and insurance), Vice Chairman and Chief Operating Officer (until May 2001); The Equitable Life Assurance Society (insurance), President and Chief Operating Officer (until May 2001) Lawrence T. Perera Trustee July 1981 Hemenway & Barnes (attorneys), (born 6/23/35) Partner J. Dale Sherratt Trustee August 1993 Insight Resources, Inc. (born 9/23/38) (acquisition planning specialists), President; Wellfleet Investments (investor in health care companies), Managing General Partner (since 1993); Cambridge Nutraceuticals (professional nutritional products), Chief Executive Officer (until May 2001) Laurie J. Thomsen Trustee March 2005 Private investor; Prism Venture (born 8/05/57) Partners (venture capital), Co- founder and General Partner (until June 2004); St. Paul Travelers Companies (commercial property liability insurance), Director Robert W. Uek Trustee January 2006 Retired (since 1999); (born 5/18/41) PricewaterhouseCoopers LLP (professional services firm), Partner (until 1999); Consultant to investment company industry (since 2000); TT International Funds (mutual fund complex), Trustee (2000 until 2005); Hillview Investment Trust II Funds (mutual fund complex), Trustee (2000 until 2005) OFFICERS Maria F. Dwyer(k) President November 2005 Massachusetts Financial Services (born 12/01/58) Company, Executive Vice President and Chief Regulatory Officer (since March 2004); Fidelity Management & Research Company, Vice President (prior to March 2004); Fidelity Group of Funds, President and Treasurer (prior to March 2004) Tracy Atkinson(k) Treasurer September 2005 Massachusetts Financial Services (born 12/30/64) Company, Senior Vice President (since September 2004); PricewaterhouseCoopers LLP, Partner (prior to September 2004) Christopher R. Bohane(k) Assistant Secretary July 2005 Massachusetts Financial Services (born 1/18/74) and Assistant Clerk Company, Vice President and Senior Counsel (since April 2003); Kirkpatrick & Lockhart LLP (law firm), Associate (prior to April 2003) Ethan D. Corey(k) Assistant Secretary July 2005 Massachusetts Financial Services (born 11/21/63) and Assistant Clerk Company, Special Counsel (since December 2004); Dechert LLP (law firm), Counsel (prior to December 2004) David L. DiLorenzo(k) Assistant Treasurer July 2005 Massachusetts Financial Services (born 8/10/68) Company, Vice President (since June 2005); JP Morgan Investor Services, Vice President (prior to June 2005) Timothy M. Fagan(k) Assistant Secretary September 2005 Massachusetts Financial Services (born 7/10/68) and Assistant Clerk Company, Vice President and Senior Counsel (since September 2005); John Hancock Advisers, LLC, Vice President and Chief Compliance Officer (September 2004 to August 2005), Senior Attorney (prior to September 2004); John Hancock Group of Funds, Vice President and Chief Compliance Officer (September 2004 to December 2004) Mark D. Fischer(k) Assistant Treasurer July 2005 Massachusetts Financial Services (born 10/27/70) Company, Vice President (since May 2005); JP Morgan Investment Management Company, Vice President (prior to May 2005) Brian E. Langenfeld(k) Assistant Secretary June 2006 Massachusetts Financial Services (born 3/07/73) and Assistant Clerk Company, Assistant Vice President and Counsel (since May 2006); John Hancock Advisers, LLC, Assistant Vice President and Counsel (May 2005 to April 2006); John Hancock Advisers, LLC, Attorney and Assistant Secretary (prior to May 2005) Ellen Moynihan(k) Assistant Treasurer April 1997 Massachusetts Financial Services (born 11/13/57) Company, Senior Vice President Susan S. Newton(k) Assistant Secretary May 2005 Massachusetts Financial Services (born 3/07/50) and Assistant Clerk Company, Senior Vice President and Associate General Counsel (since April 2005); John Hancock Advisers, LLC, Senior Vice President, Secretary and Chief Legal Officer (prior to April 2005); John Hancock Group of Funds, Senior Vice President, Secretary and Chief Legal Officer (prior to April 2005) Susan A. Pereira(k) Assistant Secretary July 2005 Massachusetts Financial Services (born 11/05/70) and Assistant Clerk Company, Vice President and Senior Counsel (since June 2004); Bingham McCutchen LLP (law firm), Associate (prior to June 2004) Mark N. Polebaum(k) Secretary and Clerk January 2006 Massachusetts Financial Services (born 5/01/52) Company, Executive Vice President, General Counsel and Secretary (since January 2006); Wilmer Cutler Pickering Hale and Dorr LLP (law firm), Partner (prior to January 2006) Frank L. Tarantino Independent Chief June 2004 Tarantino LLC (provider of (born 3/07/44) Compliance Officer compliance services), Principal (since June 2004); CRA Business Strategies Group (consulting services), Executive Vice President (April 2003 to June 2004); David L. Babson & Co. (investment adviser), Managing Director, Chief Administrative Officer and Director (prior to March 2003) James O. Yost(k) Assistant Treasurer September 1990 Massachusetts Financial Services (born 6/12/60) Company, Senior Vice President - ------------ (h) Date first appointed to serve as Trustee/officer of an MFS fund. Each Trustee has served continuously since appointment unless indicated otherwise. (j) Directorships or trusteeships of companies required to report to the Securities and Exchange Commission (i.e., "public companies"). (k) "Interested person" of the Trust within the meaning of the Investment Company Act of 1940 (referred to as the 1940 Act), which is the principal federal law governing investment companies like the fund, as a result of position with MFS. The address of MFS is 500 Boylston Street, Boston, Massachusetts 02116. (n) In 2004 and 2005, Mr. Butler provided consulting services to the independent compliance consultant retained by MFS pursuant to its settlement with the SEC concerning market timing and related matters. The terms of that settlement required that compensation and expenses related to the independent compliance consultant be borne exclusively by MFS and, therefore, MFS paid Mr. Butler for the services he rendered to the independent compliance consultant. In 2004 and 2005, MFS paid Mr. Butler a total of $351,119.29. The Trust held a shareholders' meeting in 2005 to elect Trustees, and will hold a shareholders' meeting at least once every five years thereafter, to elect Trustees. Each Trustee (except Mr. Butler and Mr. Uek) has been elected by shareholders and each Trustee and officer holds office until his or her successor is chosen and qualified or until his or her earlier death, resignation, retirement or removal. Messrs. Butler, Sherratt and Uek and Ms. Thomsen are members of the Trust's Audit Committee. Each of the Trust's Trustees and officers holds comparable positions with certain other funds of which MFS or a subsidiary is the investment adviser or distributor, and, in the case of the officers, with certain affiliates of MFS. As of January 1, 2006, the Trustees served as board members of 98 funds within the MFS Family of Funds. The Statement of Additional Information contains further information about the Trustees and is available without charge upon request by calling 1-800-225-2606. - ------------------------------------------------------------------------------------------------------- INVESTMENT ADVISER CUSTODIAN Massachusetts Financial Services Company State Street Bank and Trust Company 500 Boylston Street, Boston, MA 02116-3741 225 Franklin Street, Boston, MA 02110 DISTRIBUTOR INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM MFS Fund Distributors, Inc. Deloitte & Touche LLP 500 Boylston Street, Boston, MA 02116-3741 200 Berkeley Street, Boston, MA 02116 PORTFOLIO MANAGERS Edward L. O'Dette Terri A. Vittozzi BOARD REVIEW OF INVESTMENT ADVISORY AGREEMENT The Investment Company Act of 1940 requires that both the full Board of Trustees and a majority of the non-interested ("independent") Trustees, voting separately, annually approve the continuation of the Fund's investment advisory agreement with MFS. The Trustees consider matters bearing on the Fund and its advisory arrangements at their meetings throughout the year, including a review of performance data at each regular meeting. In addition, the independent Trustees met several times over the course of three months beginning in May and ending in July, 2006 ("contract review meetings") for the specific purpose of considering whether to approve the continuation of the investment advisory agreement for the Fund and the other investment companies that the Board oversees (the "MFS Funds"). The independent Trustees were assisted in their evaluation of the Fund's investment advisory agreement by independent legal counsel, from whom they received separate legal advice and with whom they met separately from MFS during various contract review meetings. The independent Trustees were also assisted in this process by the MFS Funds' Independent Chief Compliance Officer, a full-time senior officer appointed by and reporting to the independent Trustees. In connection with their deliberations regarding the continuation of the investment advisory agreement, the Trustees, including the independent Trustees, considered such information and factors as they believed, in light of the legal advice furnished to them and their own business judgment, to be relevant. The investment advisory agreement for the Fund was considered separately, although the Trustees also took into account the common interests of all MFS Funds in their review. As described below, the Trustees considered the nature, quality, and extent of the various investment advisory, administrative, and shareholder services performed by MFS under the existing investment advisory agreement and other arrangements with the Fund. In connection with their contract review meetings, the Trustees received and relied upon materials which included, among other items: (i) information provided by Lipper Inc. on the investment performance of the Fund for various time periods ended December 31, 2005 and the investment performance of a group of funds with substantially similar investment classifications/objectives (the "Lipper performance universe"), as well as the investment performance of a group of funds identified by objective criteria suggested by MFS ("MFS peer funds"), (ii) information provided by Lipper Inc. on the Fund's advisory fees and other expenses and the advisory fees and other expenses of comparable funds identified by Lipper (the "Lipper expense group"), as well as the advisory fees and other expenses of MFS peer funds, (iii) information provided by MFS on the advisory fees of comparable portfolios of other clients of MFS, including institutional separate accounts and other clients, (iv) information as to whether and to what extent applicable expense waivers, reimbursements or fee "breakpoints" are observed for the Fund, (v) information regarding MFS' financial results and financial condition, including MFS' and certain of its affiliates' estimated profitability from services performed for the Fund and the MFS Funds as a whole, (vi) MFS' views regarding the outlook for the mutual fund industry and the strategic business plans of MFS, (vii) descriptions of various functions performed by MFS for the Funds, such as compliance monitoring and portfolio trading practices, and (viii) information regarding the overall organization of MFS, including information about MFS' senior management and other personnel providing investment advisory, administrative and other services to the Fund and the other MFS Funds. The comparative performance, fee and expense information prepared and provided by Lipper Inc. was not independently verified and the independent Trustees did not independently verify any information provided to them by MFS. The Trustees' conclusion as to the continuation of the investment advisory agreement was based on a comprehensive consideration of all information provided to the Trustees and not the result of any single factor. Some of the factors that figured particularly in the Trustees' deliberations are described below, although individual Trustees may have evaluated the information presented differently from one another, giving different weights to various factors. It is also important to recognize that the fee arrangements for the Fund and other MFS Funds are the result of years of review and discussion between the independent Trustees and MFS, that certain aspects of such arrangements may receive greater scrutiny in some years than others, and that the Trustees' conclusions may be based, in part, on their consideration of these same arrangements during the course of the year and in prior years. Based on information provided by Lipper Inc. and MFS, the Trustees reviewed the Fund's total return investment performance as well as the performance of peer groups of funds over various time periods. The Trustees placed particular emphasis on the total return performance of the Fund's Class A shares in comparison to the performance of funds in its Lipper performance universe over the three-year period ended December 31, 2005, which the Trustees believed was a long enough period to reflect differing market conditions. The Fund's performance was in the 2nd quintile relative to the other funds in the universe for this three-year period (the 1st quintile being the best performers and the 5th quintile being the worst performers). The total return performance of the Fund's Class A shares was in the 1st quintile for the one- year period and the 2nd quintile for the five-year period ended December 31, 2005 relative to the Lipper performance universe. Because of the passage of time, these performance results may differ from the performance results for more recent periods, including those shown elsewhere in this report. In the course of their deliberations, the Trustees took into account information provided by MFS in connection with the contract review meetings, as well as during investment review meetings conducted with portfolio management personnel during the course of the year regarding the Fund's performance. After reviewing these and related factors, the Trustees concluded, within the context of their overall conclusions regarding the investment advisory agreement, that they were satisfied with MFS' responses and efforts relating to investment performance. In assessing the reasonableness of the Fund's advisory fee, the Trustees considered, among other information, the Fund's advisory fee and the total expense ratio of the Fund's Class A shares as a percentage of average net assets and the advisory fee and total expense ratios of peer groups of funds based on information provided by Lipper Inc. and MFS. The Trustees considered that MFS observes an advisory fee reduction that will remain in effect for the Fund through February 28, 2009 as part of MFS' settlement with the New York Attorney General concerning market timing and related matters. The Trustees also considered that, according to the Lipper data, the Fund's effective advisory fee rate (taking into account the advisory fee reduction) and total expense ratio were each lower than the Lipper expense group median. The Trustees also considered the advisory fees charged by MFS to institutional accounts. In comparing these fees, the Trustees considered information provided by MFS as to the generally broader scope of services provided by MFS to the Fund in comparison to institutional accounts, the higher demands placed on MFS' investment personnel and trading infrastructure as a result of the daily cash in-flows and out-flows of the Fund, and the impact on MFS and expenses associated with the more extensive regulatory regime to which the Fund is subject in comparison to institutional accounts. The Trustees also considered whether the Fund is likely to benefit from any economies of scale in the management of the Fund in the event of growth in assets of the Fund. They noted that the Fund's advisory fee rate schedule is not currently subject to any breakpoints. Taking into account the advisory fee reduction noted above, the Trustees determined not to recommend any advisory fee breakpoints for the Fund at this time. The Trustees also considered information prepared by MFS relating to MFS' costs and profits with respect to the Fund, the MFS Funds considered as a group, and other investment companies and accounts advised by MFS, as well as MFS' methodologies used to determine and allocate its costs to the MFS Funds, the Fund and other accounts and products for purposes of estimating profitability. After reviewing these and other factors described herein, the Trustees concluded, within the context of their overall conclusions regarding the investment advisory agreement, that the advisory fees charged to the Fund represent reasonable compensation in light of the services being provided by MFS to the Fund. In addition, the Trustees considered MFS' resources and related efforts to continue to retain, attract and motivate capable personnel to serve the Fund. The Trustees also considered current and developing conditions in the financial services industry, including the entry into the industry of large and well-capitalized companies which are spending, and appear to be prepared to continue to spend, substantial sums to engage personnel and to provide services to competing investment companies. In this regard, the Trustees also considered the financial resources of MFS and its ultimate parent, Sun Life Financial Inc. The Trustees also considered the advantages and possible disadvantages to the Fund of having an adviser which also serves other investment companies as well as other accounts. The Trustees also considered the nature, quality, cost, and extent of administrative, transfer agency, and distribution services provided to the Fund by MFS and its affiliates under agreements and plans other than the investment advisory agreement, including any 12b-1 fees the Fund pays to MFS Fund Distributors, Inc., an affiliate of MFS. The Trustees also considered the nature, extent and quality of certain other services MFS performs or arranges for on the Fund's behalf, which may include securities lending programs, directed expense payment programs, class action recovery programs, and MFS' interaction with third-party service providers, principally custodians and sub-custodians. The Trustees concluded that the various non-advisory services provided by MFS and its affiliates on behalf of the Funds were satisfactory. The Trustees also considered benefits to MFS from the use of the Fund's portfolio brokerage commissions, if applicable, to pay for investment research (excluding third-party research, for which MFS pays directly), and various other factors. Additionally, the Trustees considered so-called "fall-out benefits" to MFS such as reputational value derived from serving as investment manager to the Fund. Based on their evaluation of factors that they deemed to be material, including those factors described above, the Board of Trustees, including a majority of the independent Trustees, concluded that the Fund's investment advisory agreement with MFS should be continued for an additional one-year period, commencing August 1, 2006. A discussion regarding the Board's most recent review and renewal of the Fund's investment advisory agreement will be available on or before November 1, 2006 by clicking on the fund's name under "Select a fund" on the MFS Web site (mfs.com). PROXY VOTING POLICIES AND INFORMATION A general description of the MFS funds' proxy voting policies and procedures is available without charge, upon request, by calling 1-800-225-2606, by visiting the Proxy Voting section of mfs.com or by visiting the SEC's Web site at http://www.sec.gov. Information regarding how the fund voted proxies relating to portfolio securities during the most recent twelve-month period ended June 30 is available without charge by visiting the Proxy Voting section of mfs.com or by visiting the SEC's Web site at http://www.sec.gov. QUARTERLY PORTFOLIO DISCLOSURE The fund will file a complete schedule of portfolio holdings with the Securities and Exchange Commission (the Commission) for the first and third quarters of each fiscal year on Form N-Q. The fund's Form N-Q may be reviewed and copied at the: Public Reference Room Securities and Exchange Commission 100 F Street, NE, Room 1580 Washington, D.C. 20549 Information on the operation of the Public Reference Room may be obtained by calling the Commission at 1-202-551-5850. The fund's Form N-Q is available on the EDGAR database on the Commission's Internet Web site at http://www.sec.gov, and copies of this information may be obtained, upon payment of a duplicating fee, by electronic request at the following e-mail address: publicinfo@sec.gov or by writing the Public Reference Section at the above address. A shareholder can also obtain the quarterly portfolio holdings report at mfs.com. FEDERAL TAX INFORMATION (unaudited) The fund will notify shareholders of amounts for use in preparing 2006 income tax forms in January 2007. MFS(R) PRIVACY NOTICE Privacy is a concern for every investor today. At MFS Investment Management(R) and the MFS funds, we take this concern very seriously. We want you to understand our policies about the investment products and services that we offer, and how we protect the nonpublic personal information of investors who have a direct relationship with us and our wholly owned subsidiaries. Throughout our business relationship, you provide us with personal information. We maintain information and records about you, your investments, and the services you use. Examples of the nonpublic personal information we maintain include o data from investment applications and other forms o share balances and transactional history with us, our affiliates, or others o facts from a consumer reporting agency We do not disclose any nonpublic personal information about our customers or former customers to anyone, except as permitted by law. We may share nonpublic personal information with third parties or certain of our affiliates in connection with servicing your account or processing your transactions. We may share information with companies or financial institutions that perform marketing services on our behalf or with other financial institutions with which we have joint marketing arrangements, subject to any legal requirements. Authorization to access your nonpublic personal information is limited to appropriate personnel who provide products, services, or information to you. We maintain physical, electronic, and procedural safeguards to help protect the personal information we collect about you. If you have any questions about the MFS privacy policy, please call 1-800-225-2606 any business day between 8 a.m. and 8 p.m. Eastern time. Note: If you own MFS products or receive MFS services in the name of a third party such as a bank or broker-dealer, their privacy policy may apply to you instead of ours. CONTACT US WEB SITE MAILING ADDRESS mfs.com MFS Service Center, Inc. P.O. Box 55824 MFS TALK Boston, MA 1-800-637-8255 02205-5824 24 hours a day OVERNIGHT MAIL ACCOUNT SERVICE AND MFS Service Center, Inc. LITERATURE 500 Boylston Street Boston, MA 02116-3741 SHAREHOLDERS 1-800-225-2606 8 a.m. to 8 p.m. ET INVESTMENT PROFESSIONALS 1-800-343-2829 8 a.m. to 8 p.m. ET RETIREMENT PLAN SERVICES 1-800-637-1255 8 a.m. to 8 p.m. ET - ------------------------------------------------------------------------------- Go paperless with eDELIVERY: Arrange to have MFS send prospectuses, reports, and proxies directly to your e-mail inbox. You'll get timely information and less clutter in your mailbox (not to mention help your fund save printing and postage costs). SIGN UP: If your account is registered with us, simply go to mfs.com, log in to your account via MFS Access, and select the eDelivery sign up options. If you own your MFS fund shares through a financial institution or a retirement plan, MFS TALK, MFS Access, and eDelivery may not be available to you. - ------------------------------------------------------------------------------- M F S(R) INVESTMENT MANAGEMENT M F S(R) INVESTMENT MANAGEMENT [graphic omitted] ANNUAL REPORT KEEPING YOU INFORMED MFS wants to ensure that you are consistently updated about your investments with us. This shareholder report will not only show how your investment performed during the time period, but will also provide you with informative commentary from the portfolio management team. They will offer an overview of market conditions and will also discuss the specific factors that may have enhanced or detracted from your investment's performance. MFS(R) CORE GROWTH FUND LETTER FROM THE CEO 1 - ------------------------------------------------------------------ PORTFOLIO COMPOSITION 2 - ------------------------------------------------------------------ MANAGEMENT REVIEW 3 - ------------------------------------------------------------------ PERFORMANCE SUMMARY 5 - ------------------------------------------------------------------ EXPENSE TABLE 8 - ------------------------------------------------------------------ PORTFOLIO OF INVESTMENTS 10 - ------------------------------------------------------------------ STATEMENT OF ASSETS AND LIABILITIES 16 - ------------------------------------------------------------------ STATEMENT OF OPERATIONS 19 - ------------------------------------------------------------------ STATEMENTS OF CHANGES IN NET ASSETS 20 - ------------------------------------------------------------------ FINANCIAL HIGHLIGHTS 21 - ------------------------------------------------------------------ NOTES TO FINANCIAL STATEMENTS 28 - ------------------------------------------------------------------ REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM 38 - ------------------------------------------------------------------ TRUSTEES AND OFFICERS 39 - ------------------------------------------------------------------ BOARD REVIEW OF INVESTMENT ADVISORY AGREEMENT 45 - ------------------------------------------------------------------ PROXY VOTING POLICIES AND INFORMATION 49 - ------------------------------------------------------------------ QUARTERLY PORTFOLIO DISCLOSURE 49 - ------------------------------------------------------------------ FEDERAL TAX INFORMATION 49 - ------------------------------------------------------------------ MFS(R) PRIVACY NOTICE 50 - ------------------------------------------------------------------ CONTACT INFORMATION BACK COVER - ------------------------------------------------------------------ Fund objective: Seeks to provide capital appreciation. THE REPORT IS PREPARED FOR THE GENERAL INFORMATION OF SHAREHOLDERS. IT IS AUTHORIZED FOR DISTRIBUTION TO PROSPECTIVE INVESTORS ONLY WHEN PRECEDED OR ACCOMPANIED BY A CURRENT PROSPECTUS. - ------------------------------------------------------------------------------ NOT FDIC INSURED o MAY LOSE VALUE o NO BANK OR CREDIT UNION GUARANTEE o NOT A DEPOSIT o NOT INSURED BY ANY FEDERAL GOVERNMENT AGENCY OR NCUA/NCUSIF - ------------------------------------------------------------------------------ 8/31/06 CGF-ANN LETTER FROM THE CEO [Photo of Robert J. Manning] Dear Shareholders: The story is as old as the tortoise and the hare, but we believe it is still relevant today -- "slow and steady" is the way to go when it comes to investing. While financial markets will naturally ebb and flow over time, investors who remain committed to a long-term investment strategy are more likely to achieve their goals than those who consistently chase short-term performance. The first half of 2006 brought a high degree of fluctuation in markets around the globe as varying economic factors pulled markets in opposite directions. The global economy, for example, continued to grow at its fastest pace in three decades -- spurred by increased international trade, good job growth, and wage increases. At the same time, central banks around the world raised interest rates in sync in a collaborative attempt to curb inflation. While this was a positive development in some regions, in other cases, economic and market gains were tempered. What does all of this mean to you as an investor? If you're focused on the long term, these global developments become part of a longer cycle instead of one-time events that can have a significant impact on your portfolio. At MFS(R), our investment management process -- honed over 80 years -- combines a unique teamwork approach with an unwavering focus on helping you realize your long-term financial goals. We believe in a three-pronged investment strategy: o ALLOCATE holdings across the major asset classes -- including stocks, bonds, and cash. o DIVERSIFY within each class to take advantage of different market segments and investing styles. o REBALANCE assets regularly to maintain a desired asset allocation. Of course, these strategies cannot guarantee a profit or protect against a loss. Investing and planning for the long term requires diligence and patience, two traits that in our experience are essential to capitalizing on the many opportunities the financial markets can offer -- through both up and down economic cycles. Respectfully, /s/ Robert J. Manning Robert J. Manning Chief Executive Officer and Chief Investment Officer MFS Investment Management(R) October 13, 2006 The opinions expressed in this letter are subject to change, may not be relied upon for investment advice, and no forecasts can be guaranteed. PORTFOLIO COMPOSITION PORTFOLIO STRUCTURE Common Stocks 94.1% Cash & Other Net Assets 5.9% TOP TEN HOLDINGS Cisco Systems, Inc. 2.9% ------------------------------------------------ First Data Corp. 2.6% ------------------------------------------------ Procter & Gamble Co. 2.4% ------------------------------------------------ Allergan, Inc. 2.4% ------------------------------------------------ Adobe Systems, Inc. 2.2% ------------------------------------------------ General Electric Co. 2.1% ------------------------------------------------ United Technologies Corp. 2.0% ------------------------------------------------ Hewlett-Packard Co. 2.0% ------------------------------------------------ Amdocs Ltd. 2.0% ------------------------------------------------ Amgen, Inc. 2.0% ------------------------------------------------ EQUITY SECTORS Technology 23.1% ------------------------------------------------ Health Care 22.5% ------------------------------------------------ Industrial Goods & Services 8.6% ------------------------------------------------ Financial Services 7.8% ------------------------------------------------ Consumer Staples 6.9% ------------------------------------------------ Leisure 6.3% ------------------------------------------------ Retailing 5.3% ------------------------------------------------ Special Products & Services 5.2% ------------------------------------------------ Energy 3.7% ------------------------------------------------ Basic Materials 2.1% ------------------------------------------------ Transportation 1.3% ------------------------------------------------ Utilities & Communications 1.3% ------------------------------------------------ Percentages are based on net assets as of 8/31/06. The portfolio is actively managed and current holdings may be different. MANAGEMENT REVIEW SUMMARY OF RESULTS For the twelve months ended August 31, 2006, Class A shares of the MFS Core Growth Fund provided a total return of 5.23%, at net asset value. This compares with a return of 3.68% for the fund's benchmark, the Russell 1000 Growth Index. CONTRIBUTORS TO PERFORMANCE The technology, health care, and leisure sectors were the top contributors to performance relative to the benchmark during the reporting period. Stock selection played the major role in each case. In the technology sector, flash memory storage products maker SanDisk and wireless communications software company QUALCOMM led the way. SanDisk has been able to drive costs down faster than price declines and, we believe, the company's acquisition of M-Systems could secure royalties in the next generation flash cards. Within the health care sector, our holdings in pharmaceutical company Roche Holding (not a benchmark constituent) and biotech firm Gilead Sciences* benefited relative returns. Strong sales of Truvada (HIV treatment) and Hepsera (antiviral medicine), and royalty income from flu medication Tamiflu, boosted Gilead's performance during the reporting period. Casino operator Las Vegas Sands was the standout performer in the leisure sector. The firm increased earnings and revenues in the first quarter of 2006, due in part to growth in its Sands Macau operations. Individual stocks in other sectors that contributed to relative results included oil and gas field equipment supplier Weatherford International*, Latin American wireless communications company America Movil, investment management and banking firm UBS, and telecommunications software provider Amdocs, none of which are benchmark constituents. Elsewhere, our holdings in agrichemical products company Monsanto also aided relative results. DETRACTORS FROM PERFORMANCE Security selection in the retailing sector held back relative performance, although no individual holdings within the sector were among the fund's top detractors for the period. In the industrial goods and services sector, our underweighted position hurt relative returns. Again, no individual stocks in this sector were among the fund's top detractors. Although the technology and healthcare sectors were top contributors to performance, several individual securities in these sectors did detract from relative results. Technology stocks that hurt relative returns included chip maker Marvell Technology Group (not a benchmark constituent), network security software company Symantec*, network equipment manufacturer Juniper Networks*, and supplier of integrated circuits Xilinx*. Individual healthcare securities that detracted from performance included cardiovascular medical devices company St. Jude Medical, orthopedic products designer Zimmer Holdings, and implantable biomedical devices maker Medtronic. Securities in other sectors that held back relative returns included high-end stereo and audio equipment manufacturer Harman International*, tobacco firm Altria Group, and electric utility company TXU*. Respectfully, Stephen Pesek Portfolio Manager * Security was not held in the portfolio at period end. The views expressed in this report are those of the portfolio manager only through the end of the period of the report as stated on the cover and do not necessarily reflect the views of MFS or any other person in the MFS organization. These views are subject to change at any time based on market and other conditions, and MFS disclaims any responsibility to update such views. These views may not be relied upon as investment advice or an indication of trading intent on behalf of any MFS portfolio. References to specific securities are not recommendations of such securities, and may not be representative of any MFS portfolio's current or future investments. PERFORMANCE SUMMARY THROUGH 8/31/06 The following chart illustrates the historical performance of the fund's Class A shares in comparison to its benchmark. Performance results include the deduction of the maximum applicable sales charge and reflect the percentage change in net asset value, including reinvestment of dividends and capital gains distributions. The performance of other share classes will be greater than or less than that of the class depicted below. Benchmark comparisons are unmanaged; do not reflect sales charges, commissions or expenses; and cannot be invested in directly. (See Notes to Performance Summary.) PERFORMANCE DATA SHOWN REPRESENTS PAST PERFORMANCE AND IS NO GUARANTEE OF FUTURE RESULTS. INVESTMENT RETURN AND PRINCIPAL VALUE FLUCTUATE SO YOUR SHARES, WHEN SOLD, MAY BE WORTH MORE OR LESS THAN THE ORIGINAL COST; CURRENT PERFORMANCE MAY BE LOWER OR HIGHER THAN QUOTED. FOR MOST RECENT MONTH-END PERFORMANCE, PLEASE VISIT MFS.COM. (FOR THE MOST RECENT MONTH-END PERFORMANCE FOR CLASS I SHARES CALL 1-800-343-2829.) THE PERFORMANCE SHOWN DOES NOT REFLECT THE DEDUCTION OF TAXES, IF ANY, THAT A SHAREHOLDER WOULD PAY ON FUND DISTRIBUTIONS OR THE REDEMPTION OF FUND SHARES. GROWTH OF A HYPOTHETICAL $10,000 INVESTMENT MFS Core Growth Fund Russell 1000 -Class A Growth Index 8/96 $ 9,425 $10,000 8/97 13,687 13,937 8/98 14,884 15,087 8/99 22,971 22,379 8/00 34,774 29,867 8/01 22,058 16,330 8/02 17,265 12,700 8/03 18,819 14,499 8/04 19,211 15,275 8/05 21,967 17,130 8/06 23,116 17,759 TOTAL RETURNS THROUGH 8/31/06 AVERAGE ANNUAL WITHOUT SALES CHARGE Share class Class inception date 1-yr 5-yr 10-yr - ----------------------------------------------------------------------------- A 1/02/96 5.23% 0.94% 9.39% - ----------------------------------------------------------------------------- B 12/31/99 4.56% 0.31% 8.93% - ----------------------------------------------------------------------------- C 12/31/99 4.62% 0.30% 8.93% - ----------------------------------------------------------------------------- I 1/02/97 5.65% 1.31% 9.66% - ----------------------------------------------------------------------------- W 5/01/06 5.35% 0.96% 9.40% - ----------------------------------------------------------------------------- R 12/31/02 5.07% 0.85% 9.34% - ----------------------------------------------------------------------------- R1 4/01/05 4.44% 0.71% 9.26% - ----------------------------------------------------------------------------- R2 4/01/05 4.80% 0.81% 9.32% - ----------------------------------------------------------------------------- R3 10/31/03 4.91% 0.74% 9.27% - ----------------------------------------------------------------------------- R4 4/01/05 5.23% 0.93% 9.38% - ----------------------------------------------------------------------------- R5 4/01/05 5.53% 1.01% 9.42% AVERAGE ANNUAL Comparative benchmark - ----------------------------------------------------------------------------- Russell 1000 Growth Index (f) 3.68% 1.69% 5.91% - ----------------------------------------------------------------------------- AVERAGE ANNUAL WITH SALES CHARGE Share class - ----------------------------------------------------------------------------- A -0.82% -0.25% 8.74% With Initial Sales Charge (5.75%) - ----------------------------------------------------------------------------- B 0.56% -0.09% 8.93% With CDSC (Declining over six years from 4% to 0%) (x) - ----------------------------------------------------------------------------- C 3.62% 0.30% 8.93% With CDSC (1% for 12 months) (x) - ----------------------------------------------------------------------------- Class I, W, R, R1, R2, R3, R4, and R5 shares do not have a sales charge. Please see Notes to Performance Summary for more details. CDSC - Contingent Deferred Sales Charge. (f) Source: FactSet Research Systems Inc. (x) Assuming redemption at the end of the applicable period. INDEX DEFINITION Russell 1000 Growth Index - constructed to provide a comprehensive barometer for growth securities in the large-cap segment of the U.S. equity universe. Companies in this index generally have higher price-to-book ratios and higher forecasted growth values. It is not possible to invest directly in an index. NOTES TO PERFORMANCE SUMMARY Class R shares are available only to existing Class R shareholders. Class I shares are only available to certain eligible investors, and Class R1, R2, R3, R4, and R5 shares are only available to certain retirement plans. Class W shares are intended for purchase only through fee-based wrap programs sponsored by financial intermediaries, such as brokerage firms and investment advisers, that have entered into an agreement with the fund's distributor to offer Class W shares to their wrap program clients. The use of Class W shares by a financial intermediary sponsor of a fee-based program will depend on, among other things, the structure of the particular fee-based wrap program. Class W shares may be purchased at net asset value without an initial sales charge or CDSC upon redemption. Performance for share classes offered after Class A shares includes the performance of the fund's Class A shares for periods prior to their offering. This blended class performance has been adjusted to take into account differences in sales loads, if any, applicable to these share classes, but has not been adjusted to take into account differences in class specific operating expenses (such as Rule 12b-1 fees). Compared to performance these share classes would have experienced had they been offered for the entire period, the use of blended performance generally results in higher performance for share classes with higher operating expenses than the share class to which it is blended, and lower performance for share classes with lower operating expenses than the share class to which it is blended. Performance results reflect any applicable expense subsidies and waivers in effect during the periods shown. Without such subsidies and waivers the fund's performance results would be less favorable. Please see the prospectus and financial statements for complete details. From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower. EXPENSE TABLE Fund expenses borne by the shareholders during the period, March 1, 2006 through August 31, 2006. As a shareholder of the fund, you incur two types of costs: (1) transaction costs, including sales charges (loads) on certain purchase or redemption payments and redemption fees on certain exchanges and redemptions, and (2) ongoing costs, including management fees; distribution and service (12b-1) fees; and other fund expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in the fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period March 1, 2006 through August 31, 2006. ACTUAL EXPENSES The first line for each share class in the following table provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number in the first line under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. HYPOTHETICAL EXAMPLE FOR COMPARISON PURPOSES The second line for each share class in the following table provides information about hypothetical account values and hypothetical expenses based on the fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs, such as sales charges (loads) or redemption fees. Therefore, the second line for each share class in the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher. - ------------------------------------------------------------------------------- Expenses Paid During Annualized Beginning Ending Period(p) Share Expense Account Value Account Value 3/01/06- Class Ratio 3/01/06 8/31/06 8/31/06 - -------------------------------------------------------------------------------- Actual 1.31% $1,000.00 $981.70 $6.54 A ------------------------------------------------------------------------ Hypothetical (h) 1.31% $1,000.00 $1,018.60 $6.67 - -------------------------------------------------------------------------------- Actual 1.97% $1,000.00 $978.70 $9.83 B ------------------------------------------------------------------------- Hypothetical (h) 1.97% $1,000.00 $1,015.27 $10.01 - -------------------------------------------------------------------------------- Actual 1.97% $1,000.00 $978.70 $9.83 C ------------------------------------------------------------------------ Hypothetical (h) 1.97% $1,000.00 $1,015.27 $10.01 - -------------------------------------------------------------------------------- Actual 0.95% $1,000.00 $983.20 $4.75 I ------------------------------------------------------------------------ Hypothetical (h) 0.95% $1,000.00 $1,020.42 $4.84 - -------------------------------------------------------------------------------- Actual 1.09% $1,000.00 $965.70 (i) $3.61 (i) W ------------------------------------------------------------------------ Hypothetical (h) 1.09% $1,000.00 $1,013.18 (i) $3.70 (i) - -------------------------------------------------------------------------------- Actual 1.46% $1,000.00 $981.10 $7.29 R ------------------------------------------------------------------------ Hypothetical (h) 1.46% $1,000.00 $1,017.85 $7.43 - -------------------------------------------------------------------------------- Actual 2.06% $1,000.00 $978.10 $10.27 R1 ------------------------------------------------------------------------ Hypothetical (h) 2.06% $1,000.00 $1,014.82 $10.46 - -------------------------------------------------------------------------------- Actual 1.70% $1,000.00 $979.90 $8.48 R2 ------------------------------------------------------------------------ Hypothetical (h) 1.70% $1,000.00 $1,016.64 $8.64 - -------------------------------------------------------------------------------- Actual 1.62% $1,000.00 $980.40 $8.09 R3 ------------------------------------------------------------------------ Hypothetical (h) 1.62% $1,000.00 $1,017.04 $8.24 - -------------------------------------------------------------------------------- Actual 1.36% $1,000.00 $981.70 $6.79 R4 ------------------------------------------------------------------------ Hypothetical (h) 1.36% $1,000.00 $1,018.35 $6.92 - -------------------------------------------------------------------------------- Actual 1.06% $1,000.00 $982.80 $5.30 R5 ------------------------------------------------------------------------ Hypothetical (h) 1.06% $1,000.00 $1,019.86 $5.40 - -------------------------------------------------------------------------------- (h) 5% class return per year before expenses. (i) For the period from the class' inception, May 1, 2006 through the stated period end. (p) Expenses paid is equal to each class' annualized expense ratio, as shown above, multiplied by the average account value over the period, multiplied by the number of days in the period, divided by the number of days in the year. Expenses paid do not include any applicable sales charges (loads) or redemption fees. If these transaction costs had been included, your costs would have been higher. PORTFOLIO OF INVESTMENTS 8/31/06 The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes. Common Stocks - 94.1% - ---------------------------------------------------------------------------------------------------- ISSUER SHARES/PAR VALUE ($) - ---------------------------------------------------------------------------------------------------- Aerospace - 2.0% - ---------------------------------------------------------------------------------------------------- United Technologies Corp. 246,600 $ 15,464,286 - ---------------------------------------------------------------------------------------------------- Apparel Manufacturers - 0.8% - ---------------------------------------------------------------------------------------------------- NIKE, Inc., "B" 77,200 $ 6,234,672 - ---------------------------------------------------------------------------------------------------- Biotechnology - 5.4% - ---------------------------------------------------------------------------------------------------- Amgen, Inc. (n) 222,140 $ 15,089,970 Celgene Corp. (l)(n) 232,100 9,444,149 Genentech, Inc. (n) 71,400 5,891,928 Genzyme Corp. (n) 171,530 11,360,432 ------------ $ 41,786,479 - ---------------------------------------------------------------------------------------------------- Broadcasting - 1.3% - ---------------------------------------------------------------------------------------------------- News Corp., "A" 544,900 $ 10,369,447 - ---------------------------------------------------------------------------------------------------- Brokerage & Asset Managers - 2.8% - ---------------------------------------------------------------------------------------------------- Charles Schwab Corp. 358,500 $ 5,847,135 Chicago Mercantile Exchange Holdings, Inc. 8,800 3,872,000 E*TRADE Financial Corp. (n) 116,000 2,736,440 Mellon Financial Corp. 110,900 4,128,807 Morgan Stanley 75,800 4,986,882 ------------ $ 21,571,264 - ---------------------------------------------------------------------------------------------------- Business Services - 4.8% - ---------------------------------------------------------------------------------------------------- Amdocs Ltd. (n) 398,300 $ 15,115,485 CheckFree Corp. (n) 44,000 1,575,200 First Data Corp. 470,600 20,221,682 ------------ $ 36,912,367 - ---------------------------------------------------------------------------------------------------- Chemicals - 1.8% - ---------------------------------------------------------------------------------------------------- Ecolab, Inc. 49,500 $ 2,206,710 Monsanto Co. 245,900 11,665,496 ------------ $ 13,872,206 - ---------------------------------------------------------------------------------------------------- Computer Software - 5.9% - ---------------------------------------------------------------------------------------------------- Adobe Systems, Inc. (n) 530,300 $ 17,202,932 Akamai Technologies, Inc. (l)(n) 62,000 2,430,400 Microsoft Corp. 558,800 14,355,572 Oracle Corp. (n) 736,600 11,527,790 ------------ $ 45,516,694 - ---------------------------------------------------------------------------------------------------- Computer Software - Systems - 3.8% - ---------------------------------------------------------------------------------------------------- Apple Computer, Inc. (n) 215,100 $ 14,594,535 Hewlett-Packard Co. 413,800 15,128,528 ------------ $ 29,723,063 - ---------------------------------------------------------------------------------------------------- Conglomerates - 0.1% - ---------------------------------------------------------------------------------------------------- Textron, Inc. 12,800 $ 1,073,408 - ---------------------------------------------------------------------------------------------------- Consumer Goods & Services - 3.4% - ---------------------------------------------------------------------------------------------------- Colgate-Palmolive Co. 89,400 $ 5,351,484 eBay, Inc. (n) 62,600 1,744,036 Procter & Gamble Co. 306,000 18,941,400 ------------ $ 26,036,920 - ---------------------------------------------------------------------------------------------------- Electrical Equipment - 4.8% - ---------------------------------------------------------------------------------------------------- Danaher Corp. 151,100 $ 10,016,419 General Electric Co. 477,400 16,260,244 Rockwell Automation, Inc. 93,200 5,254,616 W.W. Grainger, Inc. 82,400 5,504,320 ------------ $ 37,035,599 - ---------------------------------------------------------------------------------------------------- Electronics - 4.7% - ---------------------------------------------------------------------------------------------------- Altera Corp. (n) 104,800 $ 2,120,104 Intel Corp. 583,600 11,403,544 Marvell Technology Group Ltd. (n) 204,300 3,577,293 Samsung Electronics Co. Ltd. 6,330 4,280,141 SanDisk Corp. (n) 195,200 11,501,184 Texas Instruments, Inc. 101,300 3,301,367 ------------ $ 36,183,633 - ---------------------------------------------------------------------------------------------------- Energy - Independent - 1.7% - ---------------------------------------------------------------------------------------------------- CONSOL Energy, Inc. 102,000 $ 3,719,940 Devon Energy Corp. 30,600 1,912,194 EOG Resources, Inc. 22,700 1,471,414 XTO Energy, Inc. 130,100 5,954,677 ------------ $ 13,058,225 - ---------------------------------------------------------------------------------------------------- Energy - Integrated - 0.8% - ---------------------------------------------------------------------------------------------------- Exxon Mobil Corp. 87,200 $ 5,900,824 - ---------------------------------------------------------------------------------------------------- Food & Beverages - 3.0% - ---------------------------------------------------------------------------------------------------- Dean Foods Co. (n) 50,300 $ 1,992,886 Nestle S.A 28,447 9,786,388 PepsiCo, Inc. 172,820 11,281,690 ------------ $ 23,060,964 - ---------------------------------------------------------------------------------------------------- Food & Drug Stores - 1.5% - ---------------------------------------------------------------------------------------------------- CVS Corp. 350,300 $ 11,752,565 - ---------------------------------------------------------------------------------------------------- Gaming & Lodging - 2.6% - ---------------------------------------------------------------------------------------------------- International Game Technology 220,000 $ 8,509,600 Las Vegas Sands Corp. (n) 137,600 9,605,856 Royal Caribbean Cruises Ltd. 57,200 2,086,656 ------------ $ 20,202,112 - ---------------------------------------------------------------------------------------------------- General Merchandise - 1.3% - ---------------------------------------------------------------------------------------------------- Kohl's Corp. (n) 92,560 $ 5,785,926 Target Corp. 80,260 3,883,781 ------------ $ 9,669,707 - ---------------------------------------------------------------------------------------------------- Health Maintenance Organizations - 0.5% - ---------------------------------------------------------------------------------------------------- WellPoint, Inc. (n) 49,300 $ 3,816,313 - ---------------------------------------------------------------------------------------------------- Insurance - 0.4% - ---------------------------------------------------------------------------------------------------- AFLAC, Inc. 34,100 $ 1,536,887 Genworth Financial, Inc., "A" 55,800 1,921,194 ------------ $ 3,458,081 - ---------------------------------------------------------------------------------------------------- Internet - 2.8% - ---------------------------------------------------------------------------------------------------- Google, Inc., "A" (n) 32,845 $ 12,432,818 Yahoo!, Inc. (n) 320,000 9,222,400 ------------ $ 21,655,218 - ---------------------------------------------------------------------------------------------------- Leisure & Toys - 1.6% - ---------------------------------------------------------------------------------------------------- Electronic Arts, Inc. (n) 248,730 $ 12,677,768 - ---------------------------------------------------------------------------------------------------- Machinery & Tools - 1.8% - ---------------------------------------------------------------------------------------------------- Deere & Co. 104,600 $ 8,169,260 Precision Castparts Corp. 95,600 5,586,864 ------------ $ 13,756,124 - ---------------------------------------------------------------------------------------------------- Medical & Health Technology & Services - 2.7% - ---------------------------------------------------------------------------------------------------- Caremark Rx, Inc. 53,600 $ 3,105,584 DaVita, Inc. (n) 68,800 4,015,168 Henry Schein, Inc. (n) 63,300 3,156,771 IMS Health, Inc. 160,100 4,369,129 McKesson Corp. 114,400 5,811,520 ------------ $ 20,458,172 - ---------------------------------------------------------------------------------------------------- Medical Equipment - 6.9% - ---------------------------------------------------------------------------------------------------- Advanced Medical Optics, Inc. (l)(n) 205,600 $ 9,899,640 Baxter International, Inc. 174,200 7,730,996 DENTSPLY International, Inc. 91,400 2,977,812 Fisher Scientific International, Inc. (n) 123,900 9,692,697 Medtronic, Inc. 202,660 9,504,754 St. Jude Medical, Inc. (n) 50,800 1,849,628 Stryker Corp. 174,800 8,395,644 Zimmer Holdings, Inc. (n) 43,500 2,958,000 ------------ $ 53,009,171 - ---------------------------------------------------------------------------------------------------- Network & Telecom - 4.2% - ---------------------------------------------------------------------------------------------------- Cisco Systems, Inc. (n) 1,034,700 $ 22,753,053 Corning, Inc. (n) 222,820 4,955,517 QUALCOMM, Inc. 131,760 4,963,399 ------------ $ 32,671,969 - ---------------------------------------------------------------------------------------------------- Oil Services - 1.2% - ---------------------------------------------------------------------------------------------------- Schlumberger Ltd. 145,500 $ 8,919,150 - ---------------------------------------------------------------------------------------------------- Other Banks & Diversified Financials - 4.6% - ---------------------------------------------------------------------------------------------------- American Express Co. 110,480 $ 5,804,619 Countrywide Financial Corp. 43,200 1,460,160 JPMorgan Chase & Co. 140,100 6,396,966 Moody's Corp. 70,700 4,325,426 SLM Corp. 122,800 5,959,484 State Street Corp. 67,500 4,171,500 UBS AG 134,817 7,632,288 ------------ $ 35,750,443 - ---------------------------------------------------------------------------------------------------- Personal Computers & Peripherals - 1.7% - ---------------------------------------------------------------------------------------------------- EMC Corp. (n) 658,150 $ 7,667,448 Network Appliance, Inc. (n) 152,600 5,225,024 ------------ $ 12,892,472 - ---------------------------------------------------------------------------------------------------- Pharmaceuticals - 7.0% - ---------------------------------------------------------------------------------------------------- Allergan, Inc. 162,100 $ 18,570,176 Eli Lilly & Co. 105,460 5,898,378 Johnson & Johnson 222,720 14,401,075 Roche Holding AG 80,500 14,846,338 ------------ $ 53,715,967 - ---------------------------------------------------------------------------------------------------- Printing & Publishing - 0.6% - ---------------------------------------------------------------------------------------------------- McGraw-Hill Cos., Inc. 78,600 $ 4,394,526 - ---------------------------------------------------------------------------------------------------- Railroad & Shipping - 1.1% - ---------------------------------------------------------------------------------------------------- Burlington Northern Santa Fe Corp. 131,500 $ 8,803,925 - ---------------------------------------------------------------------------------------------------- Restaurants - 0.2% - ---------------------------------------------------------------------------------------------------- YUM! Brands, Inc. 37,800 $ 1,847,664 - ---------------------------------------------------------------------------------------------------- Specialty Chemicals - 0.3% - ---------------------------------------------------------------------------------------------------- Praxair, Inc. 33,800 $ 1,940,458 - ---------------------------------------------------------------------------------------------------- Specialty Stores - 1.7% - ---------------------------------------------------------------------------------------------------- Best Buy Co., Inc. 40,800 $ 1,917,600 Lowe's Cos., Inc. 70,600 1,910,436 Staples, Inc. 423,800 9,560,928 ------------ $ 13,388,964 - ---------------------------------------------------------------------------------------------------- Telecommunications - Wireless - 1.3% - ---------------------------------------------------------------------------------------------------- America Movil S.A. de C.V., "L", ADR 270,200 $ 10,081,162 - ---------------------------------------------------------------------------------------------------- Tobacco - 0.8% - ---------------------------------------------------------------------------------------------------- Altria Group, Inc. 72,200 $ 6,030,866 - ---------------------------------------------------------------------------------------------------- Trucking - 0.2% - ---------------------------------------------------------------------------------------------------- FedEx Corp. 17,360 $ 1,753,881 - ---------------------------------------------------------------------------------------------------- TOTAL COMMON STOCKS (IDENTIFIED COST, $718,630,986) $726,446,729 - ---------------------------------------------------------------------------------------------------- Collateral for Securities Loaned - 1.7% - ---------------------------------------------------------------------------------------------------- Navigator Securities Lending Prime Portfolio, at Cost and Net Asset Value 12,681,618 $ 12,681,618 - ---------------------------------------------------------------------------------------------------- Repurchase Agreements - 5.6% - ---------------------------------------------------------------------------------------------------- Merrill Lynch & Co., 5.28%, dated 8/31/06, due 9/01/06, total to be received $43,545,386 (secured by various U.S. Treasury and Federal Agency obligations and Mortgage Backed Securities in a jointly traded account), at Cost $43,539,000 $ 43,539,000 - ---------------------------------------------------------------------------------------------------- TOTAL INVESTMENTS (IDENTIFIED COST, $774,851,604) $782,667,347 - ---------------------------------------------------------------------------------------------------- Other Assets, Less Liabilities - (1.4)% (10,435,977) - ---------------------------------------------------------------------------------------------------- NET ASSETS - 100.0% $772,231,370 - ---------------------------------------------------------------------------------------------------- (l) All or a portion of this security is on loan. (n) Non-income producing security. The following abbreviations are used in this report and are defined: ADR American Depository Receipt SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENT OF ASSETS AND LIABILITIES At 8/31/06 This statement represents your fund's balance sheet, which details the assets and liabilities comprising the total value of the fund. ASSETS - ----------------------------------------------------------------------------------------------------- Investments, at value, including $12,403,933 of securities on loan (identified cost, $774,851,604) $782,667,347 Cash 356 Receivable for investments sold 13,221,460 Receivable for fund shares sold 210,443 Interest and dividends receivable 553,599 Other assets 4,787 - ----------------------------------------------------------------------------------------------------- Total assets $796,657,992 - ----------------------------------------------------------------------------------------------------- LIABILITIES - ----------------------------------------------------------------------------------------------------- Payable for investments purchased $9,007,169 Payable for fund shares reacquired 2,180,211 Collateral for securities loaned, at value 12,681,618 Payable to affiliates Management fee 27,533 Shareholder servicing costs 101,633 Distribution and service fees 22,143 Administrative services fee 789 Retirement plan administration and services fees 62 Payable for independent trustees' compensation 45,134 Accrued expenses and other liabilities 360,330 - ----------------------------------------------------------------------------------------------------- Total liabilities $24,426,622 - ----------------------------------------------------------------------------------------------------- Net assets $772,231,370 - ----------------------------------------------------------------------------------------------------- NET ASSETS CONSIST OF - ----------------------------------------------------------------------------------------------------- Paid-in capital $820,409,071 Unrealized appreciation (depreciation) on investments and translation of assets and liabilities in foreign currencies 7,817,015 Accumulated net realized gain (loss) on investments and foreign currency transactions (55,949,152) Accumulated net investment loss (45,564) - ----------------------------------------------------------------------------------------------------- Net assets $772,231,370 - ----------------------------------------------------------------------------------------------------- Shares of beneficial interest outstanding 44,120,603 - ----------------------------------------------------------------------------------------------------- Statement of Assets and Liabilities - continued Class A shares - ----------------------------------------------------------------------------------------------------- Net assets $504,760,868 Shares outstanding 28,516,490 - ----------------------------------------------------------------------------------------------------- Net asset value per share $17.70 - ----------------------------------------------------------------------------------------------------- Offering price per share (100/94.25Xnet asset value per share) $18.78 - ----------------------------------------------------------------------------------------------------- Class B shares - ----------------------------------------------------------------------------------------------------- Net assets $162,868,467 Shares outstanding 9,593,319 - ----------------------------------------------------------------------------------------------------- Net asset value and offering price per share $16.98 - ----------------------------------------------------------------------------------------------------- Class C shares - ----------------------------------------------------------------------------------------------------- Net assets $58,522,521 Shares outstanding 3,447,133 - ----------------------------------------------------------------------------------------------------- Net asset value and offering price per share $16.98 - ----------------------------------------------------------------------------------------------------- Class I shares - ----------------------------------------------------------------------------------------------------- Net assets $34,998,056 Shares outstanding 1,928,048 - ----------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $18.15 - ----------------------------------------------------------------------------------------------------- Class W shares - ----------------------------------------------------------------------------------------------------- Net assets $96,550 Shares outstanding 5,450 - ----------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $17.72 - ----------------------------------------------------------------------------------------------------- Class R shares - ----------------------------------------------------------------------------------------------------- Net assets $5,735,473 Shares outstanding 325,482 - ----------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $17.62 - ----------------------------------------------------------------------------------------------------- Class R1 shares - ----------------------------------------------------------------------------------------------------- Net assets $505,795 Shares outstanding 29,836 - ----------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $16.95 - ----------------------------------------------------------------------------------------------------- Class R2 shares - ----------------------------------------------------------------------------------------------------- Net assets $2,597,703 Shares outstanding 152,566 - ----------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $17.03 - ----------------------------------------------------------------------------------------------------- Class R3 shares - ----------------------------------------------------------------------------------------------------- Net assets $1,803,964 Shares outstanding 102,960 - ----------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $17.52 - ----------------------------------------------------------------------------------------------------- Statement of Assets and Liabilities - continued Class R4 shares - ----------------------------------------------------------------------------------------------------- Net assets $285,941 Shares outstanding 16,165 - ----------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $17.69 - ----------------------------------------------------------------------------------------------------- Class R5 shares - ----------------------------------------------------------------------------------------------------- Net assets $56,032 Shares outstanding 3,154 - ----------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $17.76 - ----------------------------------------------------------------------------------------------------- Shares outstanding are rounded for presentation purposes. On sales of $50,000 or more, the offering price of Class A shares is reduced. A contingent deferred sales charge may be imposed on redemptions of Class A, Class B, and Class C shares. SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENT OF OPERATIONS Year ended 8/31/06 This statement describes how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations. NET INVESTMENT LOSS - ----------------------------------------------------------------------------------------------------- Income Dividends $7,622,451 Interest 1,381,556 Foreign taxes withheld (116,766) - ----------------------------------------------------------------------------------------------------- Total investment income $8,887,241 - ----------------------------------------------------------------------------------------------------- Expenses Management fee $6,532,327 Distribution and service fees 4,736,046 Shareholder servicing costs 2,252,996 Administrative services fee 121,899 Retirement plan administration and services fees 7,640 Independent trustees' compensation 21,525 Custodian fee 191,267 Shareholder communications 155,541 Auditing fees 40,772 Legal fees 14,144 Miscellaneous 173,109 - ----------------------------------------------------------------------------------------------------- Total expenses $14,247,266 - ----------------------------------------------------------------------------------------------------- Fees paid indirectly (118,371) Reduction of expenses by investment adviser (876,426) - ----------------------------------------------------------------------------------------------------- Net expenses $13,252,469 - ----------------------------------------------------------------------------------------------------- Net investment loss $(4,365,228) - ----------------------------------------------------------------------------------------------------- REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS - ----------------------------------------------------------------------------------------------------- Realized gain (loss) (identified cost basis) Investment transactions $93,384,859 Foreign currency transactions (773) - ----------------------------------------------------------------------------------------------------- Net realized gain (loss) on investments and foreign currency transactions $93,384,086 - ----------------------------------------------------------------------------------------------------- Change in unrealized appreciation (depreciation) Investments $(42,353,164) Translation of assets and liabilities in foreign currencies 13,580 - ----------------------------------------------------------------------------------------------------- Net unrealized gain (loss) on investments and foreign currency translation $(42,339,584) - ----------------------------------------------------------------------------------------------------- Net realized and unrealized gain (loss) on investments and foreign currency $51,044,502 - ----------------------------------------------------------------------------------------------------- Change in net assets from operations $46,679,274 - ----------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENTS OF CHANGES IN NET ASSETS These statements describe the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions. YEARS ENDED 8/31 --------------------------------- 2006 2005 CHANGE IN NET ASSETS FROM OPERATIONS - ----------------------------------------------------------------------------------------------- Net investment loss $(4,365,228) $(2,104,858) Net realized gain (loss) on investments and foreign currency transactions 93,384,086 152,520,859 Net unrealized gain (loss) on investments and foreign currency translation (42,339,584) (56,264,736) - ----------------------------------------------------------------------------------------------- Change in net assets from operations $46,679,274 $94,151,265 - ----------------------------------------------------------------------------------------------- Change in net assets from fund share transactions $(201,470,391) $191,397,865 - ----------------------------------------------------------------------------------------------- Redemption fees $-- $3,489 - ----------------------------------------------------------------------------------------------- Total change in net assets $(154,791,117) $285,552,619 - ----------------------------------------------------------------------------------------------- NET ASSETS - ----------------------------------------------------------------------------------------------- At beginning of period 927,022,487 641,469,868 At end of period (including accumulated net investment loss of $45,564 and $43,711, respectively) $772,231,370 $927,022,487 - ----------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Statements FINANCIAL HIGHLIGHTS The financial highlights table is intended to help you understand the fund's financial performance for the past 5 years (or life of a particular share class, if shorter). Certain information reflects financial results for a single fund share. The total returns in the table represent the rate by which an investor would have earned (or lost) on an investment in the fund share class (assuming reinvestment of all distributions) held for the entire period. This information has been audited by the fund's independent registered public accounting firm, whose report, together with the fund's financial statements, are included in this report. CLASS A YEARS ENDED 8/31 -------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $16.82 $14.71 $14.41 $13.22 $16.89 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.05) $(0.01) $(0.07) $(0.07) $(0.12) Net realized and unrealized gain (loss) on investments and foreign currency 0.93 2.12 0.37 1.26 (3.55) - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.88 $2.11 $0.30 $1.19 $(3.67) - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $17.70 $16.82 $14.71 $14.41 $13.22 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 5.23 14.34 2.08(b) 9.00 (21.73) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.44 1.38 1.41 1.42 1.43 Expenses after expense reductions (f) 1.34 1.28 1.36 N/A 1.47(e) Net investment loss (0.31) (0.08) (0.47) (0.52) (0.76) Portfolio turnover 245 184 261 312 257 Net assets at end of period (000 Omitted) $504,761 $632,209 $404,511 $496,271 $417,986 - -------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS B YEARS ENDED 8/31 ---------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $16.24 $14.30 $14.09 $13.01 $16.72 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.16) $(0.11) $(0.16) $(0.15) $(0.22) Net realized and unrealized gain (loss) on investments and foreign currency 0.90 2.05 0.37 1.23 (3.49) - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.74 $1.94 $0.21 $1.08 $(3.71) - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $16.98 $16.24 $14.30 $14.09 $13.01 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 4.56 13.57 1.49(b) 8.22 (22.13) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.09 2.03 2.05 2.07 2.08 Expenses after expense reductions (f) 1.99 1.93 2.00 N/A 2.12(e) Net investment loss (0.96) (0.73) (1.11) (1.18) (1.41) Portfolio turnover 245 184 261 312 257 Net assets at end of period (000 Omitted) $162,868 $201,513 $138,226 $155,602 $114,619 - -------------------------------------------------------------------------------------------------------------------------- CLASS C YEARS ENDED 8/31 ---------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $16.23 $14.30 $14.10 $13.02 $16.73 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.16) $(0.11) $(0.16) $(0.15) $(0.22) Net realized and unrealized gain (loss) on investments and foreign currency 0.91 2.04 0.36 1.23 (3.49) - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.75 $1.93 $0.20 $1.08 $(3.71) - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $16.98 $16.23 $14.30 $14.10 $13.02 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 4.62 13.50 1.42(b) 8.29 (22.18) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.09 2.03 2.05 2.07 2.08 Expenses after expense reductions (f) 1.99 1.93 2.00 N/A 2.12(e) Net investment loss (0.96) (0.69) (1.12) (1.18) (1.41) Portfolio turnover 245 184 261 312 257 Net assets at end of period (000 Omitted) $58,523 $82,182 $91,225 $110,786 $82,441 - -------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS I YEARS ENDED 8/31 ---------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $17.18 $14.98 $14.63 $13.37 $17.01 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment income (loss) (d) $0.00(w) $0.05 $(0.02) $(0.02) $(0.06) Net realized and unrealized gain (loss) on investments and foreign currency 0.97 2.15 0.37 1.28 (3.58) - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.97 $2.20 $0.35 $1.26 $(3.64) - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $18.15 $17.18 $14.98 $14.63 $13.37 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 5.65 14.69 2.39(b) 9.42 (21.40) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.06 1.02 1.06 1.07 1.08 Expenses after expense reductions (f) 0.96 0.92 1.01 N/A 1.12(e) Net investment income (loss) 0.03 0.32 (0.11) (0.16) (0.39) Portfolio turnover 245 184 261 312 257 Net assets at end of period (000 Omitted) $34,998 $3,816 $4,136 $4,317 $4,403 - -------------------------------------------------------------------------------------------------------------------------- CLASS W YEAR ENDED 8/31 --------------- 2006(i) Net asset value, beginning of period $18.35 - --------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - --------------------------------------------------------------------------------------------------------------------------- Net investment income (d) $(0.00)(w) Net realized and unrealized gain (loss) on investments and foreign currency (0.63)(g) - --------------------------------------------------------------------------------------------------------------------------- Total from investment operations $(0.63) - --------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $17.72 - --------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) (3.43)(n) - --------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - --------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.18(a) Expenses after expense reductions (f) 1.08(a) Net investment loss (0.03)(a) Portfolio turnover 245 Net assets at end of period (000 Omitted) $97 - --------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R YEARS ENDED 8/31 ---------------------------------------------------- 2006 2005 2004 2003(i) Net asset value, beginning of period $16.77 $14.69 $14.41 $12.35 - --------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - --------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.08) $(0.04) $(0.09) $(0.08) Net realized and unrealized gain (loss) on investments and foreign currency 0.93 2.12 0.37 2.14(g) - --------------------------------------------------------------------------------------------------- Total from investment operations $0.85 $2.08 $0.28 $2.06 - --------------------------------------------------------------------------------------------------- Net asset value, end of period $17.62 $16.77 $14.69 $14.41 - --------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 5.07 14.16 1.94(b) 16.68(n) - --------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - --------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.59 1.54 1.56 1.65(a) Expenses after expense reductions (f) 1.49 1.44 1.51 N/A Net investment loss (0.46) (0.25) (0.60) (0.82)(a) Portfolio turnover 245 184 261 312 Net assets at end of period (000 Omitted) $5,735 $5,904 $3,266 $1,869 - --------------------------------------------------------------------------------------------------- CLASS R1 YEARS ENDED 8/31 ---------------------- 2006 2005(i) Net asset value, beginning of period $16.23 $15.35 - --------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - --------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.17) $(0.08) Net realized and unrealized gain (loss) on investments and foreign currency 0.89 0.96(g) - --------------------------------------------------------------------------------------------------- Total from investment operations $0.72 $0.88 - --------------------------------------------------------------------------------------------------- Net asset value, end of period $16.95 $16.23 - --------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 4.44 5.73(n) - --------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - --------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.28 2.35(a) Expenses after expense reductions (f) 2.09 2.25(a) Net investment loss (1.07) (1.21)(a) Portfolio turnover 245 184 Net assets at end of period (000 Omitted) $506 $80 - --------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R2 YEARS ENDED 8/31 ---------------------- 2006 2005(i) Net asset value, beginning of period $16.25 $15.35 - ------------------------------------------------------------------------------------ INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------ Net investment loss (d) $(0.11) $(0.04) Net realized and unrealized gain (loss) on investments and foreign currency 0.89 0.94(g) - ------------------------------------------------------------------------------------ Total from investment operations $0.78 $0.90 - ------------------------------------------------------------------------------------ Net asset value, end of period $17.03 $16.25 - ------------------------------------------------------------------------------------ Total return (%) (r)(s) 4.80 5.86(n) - ------------------------------------------------------------------------------------ RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------ Expenses before expense reductions (f) 1.97 2.04(a) Expenses after expense reductions (f) 1.73 1.94(a) Net investment loss (0.67) (0.67)(a) Portfolio turnover 245 184 Net assets at end of period (000 Omitted) $2,598 $437 - ------------------------------------------------------------------------------------ CLASS R3 YEARS ENDED 8/31 ------------------------------------- 2006 2005 2004(i) Net asset value, beginning of period $16.70 $14.67 $14.63 - ------------------------------------------------------------------------------------ INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------ Net investment loss (d) $(0.11) $(0.06) $(0.06) Net realized and unrealized gain (loss) on investments and foreign currency 0.93 2.09 0.10(g) - ------------------------------------------------------------------------------------ Total from investment operations $0.82 $2.03 $0.04 - ------------------------------------------------------------------------------------ Net asset value, end of period $17.52 $16.70 $14.67 - ------------------------------------------------------------------------------------ Total return (%) (r)(s) 4.91 13.84 0.27(b)(n) - ------------------------------------------------------------------------------------ RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------ Expenses before expense reductions (f) 1.85 1.82 1.95(a) Expenses after expense reductions (f) 1.65 1.72 1.90(a) Net investment loss (0.60) (0.48) (0.48)(a) Portfolio turnover 245 184 261 Net assets at end of period (000 Omitted) $1,804 $774 $105 - ------------------------------------------------------------------------------------ SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R4 YEARS ENDED 8/31 ---------------------- 2006 2005(i) Net asset value, beginning of period $16.81 $15.85 - --------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - --------------------------------------------------------------------- Net investment loss (d) $(0.06) $(0.03) Net realized and unrealized gain (loss) on investments and foreign currency 0.94 0.99(g) - --------------------------------------------------------------------- Total from investment operations $0.88 $0.96 - --------------------------------------------------------------------- Net asset value, end of period $17.69 $16.81 - --------------------------------------------------------------------- Total return (%) (r)(s) 5.23 6.06(n) - --------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - --------------------------------------------------------------------- Expenses before expense reductions (f) 1.48 1.56(a) Expenses after expense reductions (f) 1.38 1.46(a) Net investment loss (0.36) (0.41)(a) Portfolio turnover 245 184 Net assets at end of period (000 Omitted) $286 $53 - --------------------------------------------------------------------- CLASS R5 YEARS ENDED 8/31 ---------------------- 2006 2005(i) Net asset value, beginning of period $16.83 $15.85 - --------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - --------------------------------------------------------------------- Net investment loss (d) $(0.01) $(0.01) Net realized and unrealized gain (loss) on investments and foreign currency 0.94 0.99(g) - --------------------------------------------------------------------- Total from investment operations $0.93 $0.98 - --------------------------------------------------------------------- Net asset value, end of period $17.76 $16.83 - --------------------------------------------------------------------- Total return (%) (r)(s) 5.53 6.18(n) - --------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - --------------------------------------------------------------------- Expenses before expense reductions (f) 1.19 1.26(a) Expenses after expense reductions (f) 1.09 1.16(a) Net investment loss (0.06) (0.11)(a) Portfolio turnover 245 184 Net assets at end of period (000 Omitted) $56 $53 - --------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued Any redemption fees charged by the fund during the 2004 and 2005 fiscal years resulted in a per share impact of less than $0.01. (a) Annualized. (b) The fund's net asset value and total return calculation include a non-recurring accrual recorded as a result of an administrative proceeding regarding disclosure of brokerage allocation practices in connection with fund sales. The non-recurring accrual resulted in an increase in the net asset value of $0.01 per share based on the shares outstanding on the day the proceeds were recorded. (d) Per share data are based on average shares outstanding. (e) Ratio includes a reimbursement fee for expenses borne by MFS in prior years under the then existing expense reimbursement agreement. (f) Ratios do not reflect reductions from fees paid indirectly. (g) The per share amount is not in accordance with the net realized and unrealized gain/loss for the period because of the timing of sales of fund shares and the amount of per share realized and unrealized gains and losses at such time. (i) For the period from the class' inception, December 31, 2002 (Class R), October 31, 2003 (Class R3), April 1, 2005 (Classes R1, R2, R4, and R5), and May 1, 2006 (Class W) through the stated period end. (n) Not annualized. (r) Certain expenses have been reduced without which performance would have been lower. (s) From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower. (t) Total returns do not include any applicable sales charges. (w) Per share amount was less than $0.01. SEE NOTES TO FINANCIAL STATEMENTS NOTES TO FINANCIAL STATEMENTS (1) BUSINESS AND ORGANIZATION MFS Core Growth Fund (the fund) is a series of MFS Series Trust I (the trust). The trust is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open-end management investment company. (2) SIGNIFICANT ACCOUNTING POLICIES GENERAL - The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The fund can invest in foreign securities, including securities of emerging market issuers. Investments in foreign securities are vulnerable to the effects of changes in the relative values of the local currency and the U.S. dollar and to the effects of changes in each country's legal, political, and economic environment. The markets of emerging markets countries are generally more volatile than the markets of developed countries with more mature economies. All of the risks of investing in foreign securities previously described are heightened when investing in emerging markets countries. INVESTMENT VALUATIONS - Equity securities, including restricted equity securities, are generally valued at the last sale or official closing price as reported by an independent pricing service on the market or exchange on which they are primarily traded. For securities for which there were no sales reported that day, equity securities are generally valued at the last quoted daily bid quotation as reported by an independent pricing service on the market or exchange on which they are primarily traded. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which approximates market value. Open-end investment companies are generally valued at their net asset value per share. Securities and other assets generally valued on the basis of information from an independent pricing service may also be valued at a broker-dealer bid quotation. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates reported by an independent pricing service. The Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund's investments (including any fair valuation) to the adviser pursuant to valuation policies and procedures approved by the Board. If the adviser determines that reliable market quotations are not readily available, investments are valued at fair value as determined in good faith by the adviser in accordance with such procedures under the oversight of the Board of Trustees. Under the fund's valuation policies and procedures, market quotations are not considered to be readily available for many types of debt instruments. These investments are generally valued at fair value based on information from independent pricing services. The adviser may rely on independent pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund's net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of investments used to determine the fund's net asset value may differ from quoted or published prices for the same investments. In addition, investments may be valued at fair value if the adviser determines that an investment's value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund's net asset value, or after the halting of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. Events that occur on a frequent basis after foreign markets close (such as developments in foreign markets and significant movements in the U.S. markets) and prior to the determination of the fund's net asset value may be deemed to have a material affect on the value of securities traded in foreign markets. Accordingly, the fund's foreign equity securities may often be valued at fair value. REPURCHASE AGREEMENTS - The fund may enter into repurchase agreements with institutions that the fund's investment adviser has determined are creditworthy. Each repurchase agreement is recorded at cost. The fund requires that the securities collateral in a repurchase transaction be transferred to the custodian in a manner sufficient to enable the fund to obtain those securities in the event of a default under the repurchase agreement. The fund monitors, on a daily basis, the value of the collateral to ensure that its value, including accrued interest, is greater than amounts owed to the fund under each such repurchase agreement. The fund, along with other affiliated entities of Massachusetts Financial Services Company (MFS), may utilize a joint trading account for the purpose of entering into one or more repurchase agreements. FOREIGN CURRENCY TRANSLATION - Purchases and sales of foreign investments, income, and expenses are converted into U.S. dollars based upon currency exchange rates prevailing on the respective dates of such transactions. Gains and losses attributable to foreign currency exchange rates on sales of securities are recorded for financial statement purposes as net realized gains and losses on investments. Gains and losses attributable to foreign exchange rate movements on income and expenses are recorded for financial statement purposes as foreign currency transaction gains and losses. That portion of both realized and unrealized gains and losses on investments that results from fluctuations in foreign currency exchange rates is not separately disclosed. SECURITY LOANS - State Street Bank and Trust Company ("State Street"), as lending agent, may loan the securities of the fund to certain qualified institutions (the "Borrowers") approved by the fund. The loans are collateralized at all times by cash and/or U.S. Treasury securities in an amount at least equal to the market value of the securities loaned. State Street provides the fund with indemnification against Borrower default. The fund bears the risk of loss with respect to the investment of cash collateral. On loans collateralized by cash, the cash collateral is invested in a money market fund or short-term securities. A portion of the income generated upon investment of the collateral is remitted to the Borrowers, and the remainder is allocated between the fund and the lending agent. On loans collateralized by U.S. Treasury securities, a fee is received from the Borrower, and is allocated between the fund and the lending agent. Income from securities lending is included in interest income on the Statement of Operations. The dividend and interest income earned on the securities loaned is accounted for in the same manner as other dividend and interest income. SHORT TERM FEES - For purchases made on or after July 1, 2004 and before April 1, 2005, the fund charged a 2% redemption fee (which was retained by the fund) on proceeds from Class A, Class B, Class C, and Class I shares redeemed or exchanged within 5 business days following their acquisition (either by purchase or exchange). Effective April 1, 2005, the fund no longer charges a redemption fee. See the fund's prospectus for details. Any redemption fees charged are accounted for as an addition to paid-in-capital. INVESTMENT TRANSACTIONS AND INCOME - Investment transactions are recorded on the trade date. Interest income is recorded on the accrual basis. All premium and discount is amortized or accreted for financial statement purposes in accordance with U.S. generally accepted accounting principles. All discount is accreted for tax reporting purposes as required by federal income tax regulations. Dividends received in cash are recorded on the ex-dividend date. Certain dividends from foreign securities will be recorded when the fund is informed of the dividend if such information is obtained subsequent to the ex- dividend date. Dividend and interest payments received in additional securities are recorded on the ex-dividend or ex-interest date in an amount equal to the value of the security on such date. The fund may receive proceeds from litigation settlements involving its portfolio holdings. Any proceeds received are reflected in realized gain/loss in the Statement of Operations, or in unrealized gain/loss if the security is still held by the fund. FEES PAID INDIRECTLY - The fund's custody fee is reduced according to an arrangement that measures the value of cash deposited with the custodian by the fund. During the year ended August 31, 2006, the fund's custodian fees were reduced by $65,406 under this arrangement. The fund has entered into a commission recapture agreement, under which certain brokers will credit the fund a portion of the commissions generated, to offset certain expenses of the fund. For the year ended August 31, 2006, the fund's custodian expenses were reduced by $52,965 under this agreement. These amounts are shown as a reduction of total expenses on the Statement of Operations. Effective January 1, 2006, the commission recapture agreement was terminated. TAX MATTERS AND DISTRIBUTIONS - The fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable income, including realized capital gains. Accordingly, no provision for federal income tax is required in the financial statements. Foreign taxes, if any, have been accrued by the fund in the accompanying financial statements. Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future. Distributions in excess of net investment income or net realized gains are temporary overdistributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions for financial statement and tax purposes. Book/tax differences primarily relate to net operating losses, wash sale loss deferrals, and expiration of capital loss carryforwards. The fund declared no distributions for the years ended August 31, 2006 and August 31, 2005. The federal tax cost and the tax basis components of distributable earnings were as follows: AS OF 8/31/06 Cost of investments $784,829,747 ------------------------------------------------------------ Gross appreciation $25,752,339 Gross depreciation (27,914,739) ------------------------------------------------------------ Net unrealized appreciation (depreciation) $(2,162,400) Undistributed ordinary income 5,724,975 Undistributed long-term capital gain 9,296,863 Capital loss carryforwards (59,221,280) Other temporary differences (1,815,859) As of August 31, 2006, the fund had capital loss carryforwards available to offset future realized gains. Such losses expire as follows: 8/31/09 $(33,513,254) 8/31/10 (25,708,026) ------------------------------------------------------------ $(59,221,280) The availability of a portion of the capital loss carryforwards, which were acquired on June 3, 2005 in connection with the MFS Large Cap Growth Fund merger, may be limited in a given year. In June 2006, FASB Interpretation No. 48, Accounting for Uncertainty in Income Taxes (the "Interpretation") was issued, and is effective for fiscal years beginning after December 15, 2006 and is to be applied to all open tax years as of the effective date. This Interpretation prescribes a minimum threshold for financial statement recognition of the benefit of a tax position taken or expected to be taken in a tax return, and requires certain expanded disclosures. Management has recently begun to evaluate the application of the Interpretation to the fund, and has not at this time determined the impact, if any, resulting from the adoption of this Interpretation on the fund's financial statements. MULTIPLE CLASSES OF SHARES OF BENEFICIAL INTEREST - The fund offers multiple classes of shares, which differ in their respective distribution and service fees. All shareholders bear the common expenses of the fund based on daily net assets of each class, without distinction between share classes. Dividends are declared separately for each class. Differences in per share dividend rates are generally due to differences in separate class expenses. Class B shares will convert to Class A shares approximately eight years after purchase. (3) TRANSACTIONS WITH AFFILIATES INVESTMENT ADVISER - The fund has an investment advisory agreement with MFS to provide overall investment management and related administrative services and facilities to the fund. The management fee is computed daily and paid monthly at an annual rate of 0.75% of the fund's average daily net assets. As part of a settlement agreement with the New York Attorney General concerning market timing and related matters, MFS has agreed to reduce the management fee to 0.65% of the fund's average daily net assets for the period March 1, 2004 through February 28, 2009. For the year ended August 31, 2006, this waiver amounted to $868,846 and is reflected as a reduction of total expenses in the Statement of Operations. The management fee incurred for the year ended August 31, 2006 was equivalent to an annual effective rate of 0.65% of the fund's average daily net assets. DISTRIBUTOR - MFS Fund Distributors, Inc. (MFD), a wholly-owned subsidiary of MFS, as distributor, received $60,856 for the year ended August 31, 2006, as its portion of the initial sales charge on sales of Class A shares of the fund. The Board of Trustees has adopted a distribution plan for certain class shares pursuant to Rule 12b-1 of the Investment Company Act of 1940. The fund's distribution plan provides that the fund will pay MFD for services provided by MFD and financial intermediaries in connection with the distribution and servicing of certain share classes. One component of the plan is a distribution fee paid to MFD and another component of the plan is a service fee paid to MFD. MFD may subsequently pay all, or a portion, of the distribution and/or service fees to financial intermediaries. Distribution Fee Plan Table: TOTAL ANNUAL DISTRIBUTION DISTRIBUTION SERVICE DISTRIBUTION EFFECTIVE AND SERVICE FEE RATE FEE RATE PLAN(d) RATE(e) FEE Class A 0.10% 0.25% 0.35% 0.35% $2,080,769 Class B 0.75% 0.25% 1.00% 1.00% 1,877,991 Class C 0.75% 0.25% 1.00% 1.00% 733,504 Class W 0.10% -- 0.10% 0.10% 32 Class R 0.25% 0.25% 0.50% 0.50% 31,236 Class R1 0.50% 0.25% 0.75% 0.75% 1,601 Class R2 0.25% 0.25% 0.50% 0.50% 3,725 Class R3 0.25% 0.25% 0.50% 0.50% 6,965 Class R4 -- 0.25% 0.25% 0.25% 223 - ------------------------------------------------------------------------------------------------------- Total Distribution and Service Fees $4,736,046 (d) In accordance with the distribution plan for certain classes, the fund pays distribution and/or service fees up to these annual percentage rates of each class' average daily net assets. (e) The annual effective rates represent actual fees incurred under the distribution plan for the year ended August 31, 2006 based on each class' average daily net assets. Certain Class A and Class C shares are subject to a contingent deferred sales charge in the event of a shareholder redemption within 12 months of purchase. Class B shares are subject to a contingent deferred sales charge in the event of a shareholder redemption within six years of purchase. All contingent deferred sales charges are paid to MFD and during the year ended August 31, 2006, were as follows: AMOUNT Class A $13,564 Class B 393,090 Class C 5,300 SHAREHOLDER SERVICING AGENT - MFS Service Center, Inc. (MFSC), a wholly-owned subsidiary of MFS, receives a fee from the fund for its services as shareholder servicing agent calculated as a percentage of the average net assets of the fund as determined periodically under the supervision of the fund's Board of Trustees. For the year ended August 31, 2006, the fee was $850,219, which equated to 0.0976% annually of the fund's average daily net assets. MFSC also receives payment from the fund for out-of-pocket and sub-accounting expenses paid by MFSC on behalf of the fund. For the year ended August 31, 2006, these costs amounted to $258,224. The fund may also pay shareholder servicing related costs to non-related parties. ADMINISTRATOR - MFS provides certain financial, legal, shareholder communications, compliance, and other administrative services to the fund. Under an administrative services agreement, the fund partially reimburses MFS the costs incurred to provide these services. The fund is charged a fixed amount plus a fee based on calendar year average net assets. From July 1, 2005 through March 31, 2006, the fund's annual fixed amount was $10,000. Effective April 1, 2006, the fund's annual fixed amount is $17,500. The administrative services fee incurred for the year ended August 31, 2006 was equivalent to an annual effective rate of 0.0140% of the fund's average daily net assets. In addition to the administrative services provided by MFS to the fund as described above, MFS is responsible for providing certain retirement plan administration and services with respect to certain shares. These services include various administrative, recordkeeping, and communication/educational services with respect to the retirement plans which invest in these shares, and may be provided directly by MFS or by a third party. MFS may subsequently pay all, or a portion, of the retirement plan administration and services fee to affiliated or unaffiliated third parties. For the year ended August 31, 2006, the fund paid MFS an annual retirement plan administration and services fee up to the following annual percentage rates of each class' average daily net assets: ANNUAL EFFECTIVE TOTAL FEE RATE RATE(g) AMOUNT Class R1 0.45% 0.36% $962 Class R2 0.40% 0.26% 3,001 Class R3 0.25% 0.15% 3,487 Class R4 0.15% 0.15% 134 Class R5 0.10% 0.10% 56 - -------------------------------------------------------------------------------- Total Retirement Plan Administration and Services Fees $7,640 (g) Effective October 1, 2005, MFS has agreed in writing to waive a portion of the retirement plan administration and services fee equal to 0.10% for Class R1 shares, 0.15% for Class R2 shares, and 0.10% for Class R3 shares. This agreement will continue until at least September 30, 2008. For the year ended August 31, 2006, this waiver amounted to $2,592 and is reflected as a reduction of total expenses in the Statement of Operations. TRUSTEES' AND OFFICERS' COMPENSATION - The fund pays compensation to Independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. The fund does not pay compensation directly to Trustees or officers of the fund who are also officers of the investment adviser, all of whom receive remuneration for their services to the fund from MFS. Certain officers and Trustees of the fund are officers or directors of MFS, MFD, and MFSC. The fund has an unfunded, defined benefit plan for certain retired Independent Trustees which resulted in a pension expense of $775. The fund also has an unfunded retirement benefit deferral plan for certain Independent Trustees which resulted in an expense of $402. Both amounts are included in Independent trustees' compensation for the year ended August 31, 2006. The deferred liability for retirement benefits payable to certain Trustees under both plans amounted to $44,481 at August 31, 2006, and is included in payable for independent trustees' compensation. OTHER - This fund and certain other MFS funds (the funds) have entered into a services agreement (the Agreement) which provides for payment of fees by the funds to Tarantino LLC in return for the provision of services of an Independent Chief Compliance Officer (ICCO) for the funds. The ICCO is an officer of the funds and the sole member of Tarantino LLC. The funds can terminate the Agreement with Tarantino LLC at any time under the terms of the Agreement. For the year ended August 31, 2006, the fee paid to Tarantino LLC was $6,270. MFS has agreed to reimburse the fund for a portion of the payments made by the funds to Tarantino LLC in the amount of $4,988, which is shown as a reduction of total expenses in the Statement of Operations. Additionally, MFS has agreed to bear all expenses associated with office space, other administrative support, and supplies provided to the ICCO. (4) PORTFOLIO SECURITIES Purchases and sales of investments, other than U.S. government securities, purchased option transactions, and short-term obligations, aggregated $2,062,110,879 and $2,279,626,246, respectively. (5) SHARES OF BENEFICIAL INTEREST The fund's Declaration of Trust permits the Trustees to issue an unlimited number of full and fractional shares of beneficial interest. Transactions in fund shares were as follows: YEAR ENDED YEAR ENDED 8/31/06(i) 8/31/05(i) SHARES AMOUNT SHARES AMOUNT Shares sold Class A 6,430,188 $113,225,460 6,045,043 $96,257,424 Class B 887,359 15,079,814 824,699 12,849,738 Class C 433,212 7,356,579 733,441 11,311,540 Class I 1,970,276 33,949,254 36,183 585,957 Class W 5,450 100,000 -- -- Class R 76,939 1,357,467 216,408 3,447,630 Class R1 29,696 489,931 5,484 84,854 Class R2 147,706 2,457,779 26,881 437,516 Class R3 88,327 1,546,974 42,062 697,441 Class R4 13,738 235,417 3,154 50,000 Class R5 4 75 3,154 50,000 - ----------------------------------------------------------------------------------------------------- 10,082,895 $175,798,750 7,936,509 $125,772,100 Share issued in connection with acquisition of MFS Large Cap Growth Fund Class A 15,966,412 $260,252,510 Class B 4,980,471 78,492,230 Class I 2,991 49,763 - ----------------------------------------------------------------------------------------------------- 20,949,874 $338,794,503 Shares reacquired Class A (15,505,829) $(271,914,439) (11,909,431) $(190,911,285) Class B (3,706,240) (62,822,571) (3,061,054) (47,687,100) Class C (2,048,446) (35,022,100) (2,051,435) (31,628,141) Class I (264,308) (4,682,666) (93,157) (1,502,028) Class R (103,586) (1,796,528) (86,556) (1,385,040) Class R1 (4,778) (79,351) (566) (9,209) Class R2 (22,019) (382,432) (2) (39) Class R3 (31,732) (556,427) (2,868) (45,896) Class R4 (727) (12,551) -- -- Class R5 (4) (76) -- -- - ----------------------------------------------------------------------------------------------------- (21,687,669) $(377,269,141) (17,205,069) $(273,168,738) Net change Class A (9,075,641) $(158,688,979) 10,102,024 $165,598,649 Class B (2,818,881) (47,742,757) 2,744,116 43,654,868 Class C (1,615,234) (27,665,521) (1,317,994) (20,316,601) Class I 1,705,968 29,266,588 (53,983) (866,308) Class W 5,450 100,000 -- -- Class R (26,647) (439,061) 129,852 2,062,590 Class R1 24,918 410,580 4,918 75,645 Class R2 125,687 2,075,347 26,879 437,477 Class R3 56,595 990,547 39,194 651,545 Class R4 13,011 222,866 3,154 50,000 Class R5 -- (1) 3,154 50,000 - ----------------------------------------------------------------------------------------------------- (11,604,774) $(201,470,391) 11,681,314 $191,397,865 (i) For the period from the class' inception, April 1, 2005 (Classes R1, R2, R4, and R5) and May 1, 2006 (Class W) through the stated period end. (6) LINE OF CREDIT The fund and other affiliated funds participate in a $1 billion unsecured committed line of credit provided by a syndication of banks under a credit agreement. In addition, the fund and other affiliated funds have established uncommitted borrowing arrangements with certain banks. Borrowings may be made for temporary financing needs. Interest is charged to each fund, based on its borrowings, generally at a rate equal to the Federal Reserve funds rate plus 0.35%. In addition, a commitment fee, based on the average daily, unused portion of the committed line of credit, is allocated among the participating funds at the end of each calendar quarter. For the year ended August 31, 2006, the fund's commitment fee and interest expense were $5,677 and $5,146, respectively, and are included in miscellaneous expense on the Statement of Operations. (7) ACQUISITIONS At close of business on June 3, 2005, the fund acquired all of the assets and liabilities of MFS Large Cap Growth Fund. The acquisition was accomplished by a tax-free exchange of 20,949,874 shares of the fund (valued at $338,794,503) for all of the assets and liabilities of MFS Large Cap Growth Fund. MFS Large Cap Growth Fund then converted all of its outstanding shares for the shares of the fund and distributed those shares to its shareholders. MFS Large Cap Growth Fund's net assets on that date were $338,794,503, including $39,750,917 of unrealized appreciation, $1,382,225 of accumulated net investment loss, and $300,727,128 of accumulated net realized loss on investments and foreign currency transactions. These assets were combined with those of the fund. The aggregate net assets of the fund after the acquisition were $960,823,462. REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM To the Trustees of MFS Series Trust I and Shareholders of MFS Core Growth Fund: We have audited the accompanying statement of assets and liabilities of MFS Core Growth Fund (the Fund) (one of the portfolios comprising MFS Series Trust I), including the portfolio of investments, as of August 31, 2006, and the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended, and the financial highlights for each of the periods indicated therein. These financial statements and financial highlights are the responsibility of the Fund's management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. We were not engaged to perform an audit of the Fund's internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Fund's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements and financial highlights, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of August 31, 2006, by correspondence with the Fund's custodian and brokers or by other appropriate auditing procedures where replies from brokers were not received. We believe that our audits provide a reasonable basis for our opinion. In our opinion, the financial statements and financial highlights referred to above present fairly, in all material respects, the financial position of MFS Core Growth Fund at August 31, 2006, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended, and its financial highlights for each of the periods indicated therein, in conformity with U.S. generally accepted accounting principles. /s/ ERNST & YOUNG LLP Boston, Massachusetts October 20, 2006 TRUSTEES AND OFFICERS -- IDENTIFICATION AND BACKGROUND The Trustees and officers of the Trust, as of October 1, 2006, are listed below, together with their principal occupations during the past five years. (Their titles may have varied during that period.) The address of each Trustee and officer is 500 Boylston Street, Boston, Massachusetts 02116. PRINCIPAL OCCUPATIONS DURING POSITION(s) HELD TRUSTEE/OFFICER THE PAST FIVE YEARS & NAME, DATE OF BIRTH WITH FUND SINCE(h) OTHER DIRECTORSHIPS(j) - ------------------- ---------------- --------------- ---------------------------- INTERESTED TRUSTEES Robert J. Manning(k) Trustee February 2004 Massachusetts Financial Services (born 10/20/63) Company, Chief Executive Officer, President, Chief Investment Officer and Director Robert C. Pozen(k) Trustee February 2004 Massachusetts Financial Services (born 8/08/46) Company, Chairman (since February 2004); Secretary of Economic Affairs, The Commonwealth of Massachusetts (January 2002 to December 2002); Fidelity Investments, Vice Chairman (June 2000 to December 2001); Fidelity Management & Research Company (investment adviser), President (March 1997 to July 2001); Bell Canada Enterprises (telecommunications), Director; Medtronic, Inc. (medical technology), Director; Telesat (satellite communications), Director INDEPENDENT TRUSTEES J. Atwood Ives Trustee and Chair February 1992 Private investor; Eastern (born 5/01/36) of Trustees Enterprises (diversified services company), Chairman, Trustee and Chief Executive Officer (until November 2000) Robert E. Butler(n) Trustee January 2006 Consultant - regulatory and (born 11/29/41) compliance matters (since July 2002); PricewaterhouseCoopers LLP (professional services firm), Partner (November 2000 until June 2002) Lawrence H. Cohn, M.D. Trustee August 1993 Brigham and Women's Hospital, (born 3/11/37) Senior Cardiac Surgeon, Chief of Cardiac Surgery (until 2005); Harvard Medical School, Professor of Surgery; Brigham and Women's Hospital Physicians' Organization, Chair (2000 to 2004) David H. Gunning Trustee January 2004 Cleveland-Cliffs Inc. (mining (born 5/30/42) products and service provider), Vice Chairman/Director (since April 2001); Encinitos Ventures (private investment company), Principal (1997 to April 2001); Lincoln Electric Holdings, Inc. (welding equipment manufacturer), Director William R. Gutow Trustee December 1993 Private investor and real estate (born 9/27/41) consultant; Capitol Entertainment Management Company (video franchise), Vice Chairman Michael Hegarty Trustee December 2004 Retired; AXA Financial (financial (born 12/21/44) services and insurance), Vice Chairman and Chief Operating Officer (until May 2001); The Equitable Life Assurance Society (insurance), President and Chief Operating Officer (until May 2001) Lawrence T. Perera Trustee July 1981 Hemenway & Barnes (attorneys), (born 6/23/35) Partner J. Dale Sherratt Trustee August 1993 Insight Resources, Inc. (born 9/23/38) (acquisition planning specialists), President; Wellfleet Investments (investor in health care companies), Managing General Partner (since 1993); Cambridge Nutraceuticals (professional nutritional products), Chief Executive Officer (until May 2001) Laurie J. Thomsen Trustee March 2005 Private investor; Prism Venture (born 8/05/57) Partners (venture capital), Co- founder and General Partner (until June 2004); St. Paul Travelers Companies (commercial property liability insurance), Director Robert W. Uek Trustee January 2006 Retired (since 1999); (born 5/18/41) PricewaterhouseCoopers LLP (professional services firm), Partner (until 1999); Consultant to investment company industry (since 2000); TT International Funds (mutual fund complex), Trustee (2000 until 2005); Hillview Investment Trust II Funds (mutual fund complex), Trustee (2000 until 2005) OFFICERS Maria F. Dwyer(k) President November 2005 Massachusetts Financial Services (born 12/01/58) Company, Executive Vice President and Chief Regulatory Officer (since March 2004); Fidelity Management & Research Company, Vice President (prior to March 2004); Fidelity Group of Funds, President and Treasurer (prior to March 2004) Tracy Atkinson(k) Treasurer September 2005 Massachusetts Financial Services (born 12/30/64) Company, Senior Vice President (since September 2004); PricewaterhouseCoopers LLP, Partner (prior to September 2004) Christopher R. Bohane(k) Assistant Secretary July 2005 Massachusetts Financial Services (born 1/18/74) and Assistant Clerk Company, Vice President and Senior Counsel (since April 2003); Kirkpatrick & Lockhart LLP (law firm), Associate (prior to April 2003) Ethan D. Corey(k) Assistant Secretary July 2005 Massachusetts Financial Services (born 11/21/63) and Assistant Clerk Company, Special Counsel (since December 2004); Dechert LLP (law firm), Counsel (prior to December 2004) David L. DiLorenzo(k) Assistant Treasurer July 2005 Massachusetts Financial Services (born 8/10/68) Company, Vice President (since June 2005); JP Morgan Investor Services, Vice President (prior to June 2005) Timothy M. Fagan(k) Assistant Secretary September 2005 Massachusetts Financial Services (born 7/10/68) and Assistant Clerk Company, Vice President and Senior Counsel (since September 2005); John Hancock Advisers, LLC, Vice President and Chief Compliance Officer (September 2004 to August 2005), Senior Attorney (prior to September 2004); John Hancock Group of Funds, Vice President and Chief Compliance Officer (September 2004 to December 2004) Mark D. Fischer(k) Assistant Treasurer July 2005 Massachusetts Financial Services (born 10/27/70) Company, Vice President (since May 2005); JP Morgan Investment Management Company, Vice President (prior to May 2005) Brian E. Langenfeld(k) Assistant Secretary June 2006 Massachusetts Financial Services (born 3/07/73) and Assistant Clerk Company, Assistant Vice President and Counsel (since May 2006); John Hancock Advisers, LLC, Assistant Vice President and Counsel (May 2005 to April 2006); John Hancock Advisers, LLC, Attorney and Assistant Secretary (prior to May 2005) Ellen Moynihan(k) Assistant Treasurer April 1997 Massachusetts Financial Services (born 11/13/57) Company, Senior Vice President Susan S. Newton(k) Assistant Secretary May 2005 Massachusetts Financial Services (born 3/07/50) and Assistant Clerk Company, Senior Vice President and Associate General Counsel (since April 2005); John Hancock Advisers, LLC, Senior Vice President, Secretary and Chief Legal Officer (prior to April 2005); John Hancock Group of Funds, Senior Vice President, Secretary and Chief Legal Officer (prior to April 2005) Susan A. Pereira(k) Assistant Secretary July 2005 Massachusetts Financial Services (born 11/05/70) and Assistant Clerk Company, Vice President and Senior Counsel (since June 2004); Bingham McCutchen LLP (law firm), Associate (prior to June 2004) Mark N. Polebaum(k) Secretary and Clerk January 2006 Massachusetts Financial Services (born 5/01/52) Company, Executive Vice President, General Counsel and Secretary (since January 2006); Wilmer Cutler Pickering Hale and Dorr LLP (law firm), Partner (prior to January 2006) Frank L. Tarantino Independent Chief June 2004 Tarantino LLC (provider of (born 3/07/44) Compliance Officer compliance services), Principal (since June 2004); CRA Business Strategies Group (consulting services), Executive Vice President (April 2003 to June 2004); David L. Babson & Co. (investment adviser), Managing Director, Chief Administrative Officer and Director (prior to March 2003) James O. Yost(k) Assistant Treasurer September 1990 Massachusetts Financial Services (born 6/12/60) Company, Senior Vice President - ------------ (h) Date first appointed to serve as Trustee/officer of an MFS fund. Each Trustee has served continuously since appointment unless indicated otherwise. (j) Directorships or trusteeships of companies required to report to the Securities and Exchange Commission (i.e., "public companies"). (k) "Interested person" of the Trust within the meaning of the Investment Company Act of 1940 (referred to as the 1940 Act), which is the principal federal law governing investment companies like the fund, as a result of position with MFS. The address of MFS is 500 Boylston Street, Boston, Massachusetts 02116. (n) In 2004 and 2005, Mr. Butler provided consulting services to the independent compliance consultant retained by MFS pursuant to its settlement with the SEC concerning market timing and related matters. The terms of that settlement required that compensation and expenses related to the independent compliance consultant be borne exclusively by MFS and, therefore, MFS paid Mr. Butler for the services he rendered to the independent compliance consultant. In 2004 and 2005, MFS paid Mr. Butler a total of $351,119.29. The Trust held a shareholders' meeting in 2005 to elect Trustees, and will hold a shareholders' meeting at least once every five years thereafter, to elect Trustees. Each Trustee (except Mr. Butler and Mr. Uek) has been elected by shareholders and each Trustee and officer holds office until his or her successor is chosen and qualified or until his or her earlier death, resignation, retirement or removal. Messrs. Butler, Sherratt and Uek and Ms. Thomsen are members of the Trust's Audit Committee. Each of the Trust's Trustees and officers holds comparable positions with certain other funds of which MFS or a subsidiary is the investment adviser or distributor, and, in the case of the officers, with certain affiliates of MFS. As of January 1, 2006, the Trustees served as board members of 98 funds within the MFS Family of Funds. The Statement of Additional Information contains further information about the Trustees and is available without charge upon request by calling 1-800-225-2606. - ------------------------------------------------------------------------------------------------------- INVESTMENT ADVISER CUSTODIAN Massachusetts Financial Services Company State Street Bank and Trust Company 500 Boylston Street, Boston, MA 225 Franklin Street, Boston, MA 02110 02116-3741 INDEPENDENT REGISTERED PUBLIC DISTRIBUTOR ACCOUNTING FIRM MFS Fund Distributors, Inc. Ernst & Young LLP 500 Boylston Street, Boston, MA 200 Clarendon Street, Boston, MA 02116 02116-3741 PORTFOLIO MANAGER Stephen Pesek BOARD REVIEW OF INVESTMENT ADVISORY AGREEMENT The Investment Company Act of 1940 requires that both the full Board of Trustees and a majority of the non-interested ("independent") Trustees, voting separately, annually approve the continuation of the Fund's investment advisory agreement with MFS. The Trustees consider matters bearing on the Fund and its advisory arrangements at their meetings throughout the year, including a review of performance data at each regular meeting. In addition, the independent Trustees met several times over the course of three months beginning in May and ending in July, 2006 ("contract review meetings") for the specific purpose of considering whether to approve the continuation of the investment advisory agreement for the Fund and the other investment companies that the Board oversees (the "MFS Funds"). The independent Trustees were assisted in their evaluation of the Fund's investment advisory agreement by independent legal counsel, from whom they received separate legal advice and with whom they met separately from MFS during various contract review meetings. The independent Trustees were also assisted in this process by the MFS Funds' Independent Chief Compliance Officer, a full-time senior officer appointed by and reporting to the independent Trustees. In connection with their deliberations regarding the continuation of the investment advisory agreement, the Trustees, including the independent Trustees, considered such information and factors as they believed, in light of the legal advice furnished to them and their own business judgment, to be relevant. The investment advisory agreement for the Fund was considered separately, although the Trustees also took into account the common interests of all MFS Funds in their review. As described below, the Trustees considered the nature, quality, and extent of the various investment advisory, administrative, and shareholder services performed by MFS under the existing investment advisory agreement and other arrangements with the Fund. In connection with their contract review meetings, the Trustees received and relied upon materials which included, among other items: (i) information provided by Lipper Inc. on the investment performance of the Fund for various time periods ended December 31, 2005 and the investment performance of a group of funds with substantially similar investment classifications/objectives (the "Lipper performance universe"), as well as the investment performance of a group of funds identified by objective criteria suggested by MFS ("MFS peer funds"), (ii) information provided by Lipper Inc. on the Fund's advisory fees and other expenses and the advisory fees and other expenses of comparable funds identified by Lipper (the "Lipper expense group"), as well as the advisory fees and other expenses of MFS peer funds, (iii) information provided by MFS on the advisory fees of comparable portfolios of other clients of MFS, including institutional separate accounts and other clients, (iv) information as to whether and to what extent applicable expense waivers, reimbursements or fee "breakpoints" are observed for the Fund, (v) information regarding MFS' financial results and financial condition, including MFS' and certain of its affiliates' estimated profitability from services performed for the Fund and the MFS Funds as a whole, (vi) MFS' views regarding the outlook for the mutual fund industry and the strategic business plans of MFS, (vii) descriptions of various functions performed by MFS for the Funds, such as compliance monitoring and portfolio trading practices, and (viii) information regarding the overall organization of MFS, including information about MFS' senior management and other personnel providing investment advisory, administrative and other services to the Fund and the other MFS Funds. The comparative performance, fee and expense information prepared and provided by Lipper Inc. was not independently verified and the independent Trustees did not independently verify any information provided to them by MFS. The Trustees' conclusion as to the continuation of the investment advisory agreement was based on a comprehensive consideration of all information provided to the Trustees and not the result of any single factor. Some of the factors that figured particularly in the Trustees' deliberations are described below, although individual Trustees may have evaluated the information presented differently from one another, giving different weights to various factors. It is also important to recognize that the fee arrangements for the Fund and other MFS Funds are the result of years of review and discussion between the independent Trustees and MFS, that certain aspects of such arrangements may receive greater scrutiny in some years than others, and that the Trustees' conclusions may be based, in part, on their consideration of these same arrangements during the course of the year and in prior years. Based on information provided by Lipper Inc. and MFS, the Trustees reviewed the Fund's total return investment performance as well as the performance of peer groups of funds over various time periods. The Trustees placed particular emphasis on the total return performance of the Fund's Class A shares in comparison to the performance of funds in its Lipper performance universe over the three-year period ended December 31, 2005, which the Trustees believed was a long enough period to reflect differing market conditions. The Fund's performance was in the 3rd quintile relative to the other funds in the universe for this three-year period (the 1st quintile being the best performers and the 5th quintile being the worst performers). The total return performance of the Fund's Class A shares was in the 3rd quintile for the one-year period and the 4th quintile for the five-year period ended December 31, 2005 relative to the Lipper performance universe. Because of the passage of time, these performance results may differ from the performance results for more recent periods, including those shown elsewhere in this report. In the course of their deliberations, the Trustees took into account information provided by MFS in connection with the contract review meetings, as well as during investment review meetings conducted with portfolio management personnel during the course of the year regarding the Fund's performance. After reviewing these and related factors, the Trustees concluded, within the context of their overall conclusions regarding the investment advisory agreement, that they were satisfied with MFS' responses and efforts relating to investment performance. In assessing the reasonableness of the Fund's advisory fee, the Trustees considered, among other information, the Fund's advisory fee and the total expense ratio of the Fund's Class A shares as a percentage of average net assets and the advisory fee and total expense ratios of peer groups of funds based on information provided by Lipper Inc. and MFS. The Trustees considered that there is an advisory fee reduction in effect for the Fund through February 28, 2009 as part of MFS' settlement with the New York Attorney General concerning market timing and related matters. The Trustees also considered that, according to the Lipper data, the Fund's effective advisory fee rate (taking into account the advisory fee reduction) and total expense ratio were each lower than the Lipper expense group median. The Trustees also considered the advisory fees charged by MFS to institutional accounts. In comparing these fees, the Trustees considered information provided by MFS as to the generally broader scope of services provided by MFS to the Fund in comparison to institutional accounts, the higher demands placed on MFS' investment personnel and trading infrastructure as a result of the daily cash in-flows and out-flows of the Fund, and the impact on MFS and expenses associated with the more extensive regulatory regime to which the Fund is subject in comparison to institutional accounts. The Trustees also considered whether the Fund is likely to benefit from any economies of scale in the management of the Fund in the event of growth in assets of the Fund. They noted that the Fund's advisory fee rate schedule is not currently subject to any breakpoints. Taking into account the advisory fee reduction noted above, the Trustees determined not to recommend any advisory fee breakpoints for the Fund at this time. The Trustees also considered information prepared by MFS relating to MFS' costs and profits with respect to the Fund, the MFS Funds considered as a group, and other investment companies and accounts advised by MFS, as well as MFS' methodologies used to determine and allocate its costs to the MFS Funds, the Fund and other accounts and products for purposes of estimating profitability. After reviewing these and other factors described herein, the Trustees concluded, within the context of their overall conclusions regarding the investment advisory agreement, that the advisory fees charged to the Fund represent reasonable compensation in light of the services being provided by MFS to the Fund. In addition, the Trustees considered MFS' resources and related efforts to continue to retain, attract and motivate capable personnel to serve the Fund. The Trustees also considered current and developing conditions in the financial services industry, including the entry into the industry of large and well-capitalized companies which are spending, and appear to be prepared to continue to spend, substantial sums to engage personnel and to provide services to competing investment companies. In this regard, the Trustees also considered the financial resources of MFS and its ultimate parent, Sun Life Financial Inc. The Trustees also considered the advantages and possible disadvantages to the Fund of having an adviser which also serves other investment companies as well as other accounts. The Trustees also considered the nature, quality, cost, and extent of administrative, transfer agency, and distribution services provided to the Fund by MFS and its affiliates under agreements and plans other than the investment advisory agreement, including any 12b-1 fees the Fund pays to MFS Fund Distributors, Inc., an affiliate of MFS. The Trustees also considered the nature, extent and quality of certain other services MFS performs or arranges for on the Fund's behalf, which may include securities lending programs, directed expense payment programs, class action recovery programs, and MFS' interaction with third-party service providers, principally custodians and sub-custodians. The Trustees concluded that the various non-advisory services provided by MFS and its affiliates on behalf of the Funds were satisfactory. The Trustees also considered benefits to MFS from the use of the Fund's portfolio brokerage commissions, if applicable, to pay for investment research (excluding third-party research, for which MFS pays directly), and various other factors. Additionally, the Trustees considered so-called "fall-out benefits" to MFS such as reputational value derived from serving as investment manager to the Fund. Based on their evaluation of factors that they deemed to be material, including those factors described above, the Board of Trustees, including a majority of the independent Trustees, concluded that the Fund's investment advisory agreement with MFS should be continued for an additional one-year period, commencing August 1, 2006. A discussion regarding the Board's most recent review and renewal of the Fund's investment advisory agreement will be available on or before November 1, 2006 by clicking on the fund's name under "Select a fund" on the MFS Web site (mfs.com). PROXY VOTING POLICIES AND INFORMATION A general description of the MFS funds' proxy voting policies and procedures is available without charge, upon request, by calling 1-800-225-2606, by visiting the Proxy Voting section of mfs.com or by visiting the SEC's Web site at http://www.sec.gov. Information regarding how the fund voted proxies relating to portfolio securities during the most recent twelve-month period ended June 30 is available without charge by visiting the Proxy Voting section of mfs.com or by visiting the SEC's Web site at http://www.sec.gov. QUARTERLY PORTFOLIO DISCLOSURE The fund will file a complete schedule of portfolio holdings with the Securities and Exchange Commission (the Commission) for the first and third quarters of each fiscal year on Form N-Q. The fund's Form N-Q may be reviewed and copied at the: Public Reference Room Securities and Exchange Commission 100 F Street, NE, Room 1580 Washington, D.C. 20549 Information on the operation of the Public Reference Room may be obtained by calling the Commission at 1-202-551-5850. The fund's Form N-Q is available on the EDGAR database on the Commission's Internet Web site at http://www.sec.gov, and copies of this information may be obtained, upon payment of a duplicating fee, by electronic request at the following e-mail address: publicinfo@sec.gov or by writing the Public Reference Section at the above address. A shareholder can also obtain the quarterly portfolio holdings report at mfs.com. FEDERAL TAX INFORMATION (unaudited) The fund will notify shareholders of amounts for use in preparing 2006 income tax forms in January 2007. MFS(R) PRIVACY NOTICE Privacy is a concern for every investor today. At MFS Investment Management(R) and the MFS funds, we take this concern very seriously. We want you to understand our policies about the investment products and services that we offer, and how we protect the nonpublic personal information of investors who have a direct relationship with us and our wholly owned subsidiaries. Throughout our business relationship, you provide us with personal information. We maintain information and records about you, your investments, and the services you use. Examples of the nonpublic personal information we maintain include o data from investment applications and other forms o share balances and transactional history with us, our affiliates, or others o facts from a consumer reporting agency We do not disclose any nonpublic personal information about our customers or former customers to anyone, except as permitted by law. We may share nonpublic personal information with third parties or certain of our affiliates in connection with servicing your account or processing your transactions. We may share information with companies or financial institutions that perform marketing services on our behalf or with other financial institutions with which we have joint marketing arrangements, subject to any legal requirements. Authorization to access your nonpublic personal information is limited to appropriate personnel who provide products, services, or information to you. We maintain physical, electronic, and procedural safeguards to help protect the personal information we collect about you. If you have any questions about the MFS privacy policy, please call 1-800-225-2606 any business day between 8 a.m. and 8 p.m. Eastern time. Note: If you own MFS products or receive MFS services in the name of a third party such as a bank or broker-dealer, their privacy policy may apply to you instead of ours. CONTACT US WEB SITE MAILING ADDRESS mfs.com MFS Service Center, Inc. P.O. Box 55824 MFS TALK Boston, MA 1-800-637-8255 02205-5824 24 hours a day OVERNIGHT MAIL ACCOUNT SERVICE AND MFS Service Center, Inc. LITERATURE 500 Boylston Street Boston, MA 02116-3741 SHAREHOLDERS 1-800-225-2606 8 a.m. to 8 p.m. ET INVESTMENT PROFESSIONALS 1-800-343-2829 8 a.m. to 8 p.m. ET RETIREMENT PLAN SERVICES 1-800-637-1255 8 a.m. to 8 p.m. ET - ------------------------------------------------------------------------------- Go paperless with eDELIVERY: Arrange to have MFS send prospectuses, reports, and proxies directly to your e-mail inbox. You'll get timely information and less clutter in your mailbox (not to mention help your fund save printing and postage costs). SIGN UP: If your account is registered with us, simply go to mfs.com, log in to your account via MFS Access, and select the eDelivery sign up options. If you own your MFS fund shares through a financial institution or a retirement plan, MFS TALK, MFS Access, and eDelivery may not be available to you. - ------------------------------------------------------------------------------- M F S(R) INVESTMENT MANAGEMENT M F S(R) INVESTMENT MANAGEMENT [graphic omitted] ANNUAL REPORT KEEPING YOU INFORMED MFS wants to ensure that you are consistently updated about your investments with us. This shareholder report will not only show how your investment performed during the time period, but will also provide you with informative commentary from the portfolio management team. They will offer an overview of market conditions and will also discuss the specific factors that may have enhanced or detracted from your investment's performance. MFS(R) STRATEGIC GROWTH FUND LETTER FROM THE CEO 1 - --------------------------------------------------------------- PORTFOLIO COMPOSITION 2 - --------------------------------------------------------------- MANAGEMENT REVIEW 3 - --------------------------------------------------------------- PERFORMANCE SUMMARY 5 - --------------------------------------------------------------- EXPENSE TABLE 8 - --------------------------------------------------------------- PORTFOLIO OF INVESTMENTS 10 - --------------------------------------------------------------- STATEMENT OF ASSETS AND LIABILITIES 14 - --------------------------------------------------------------- STATEMENT OF OPERATIONS 17 - --------------------------------------------------------------- STATEMENTS OF CHANGES IN NET ASSETS 19 - --------------------------------------------------------------- FINANCIAL HIGHLIGHTS 20 - --------------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 29 - --------------------------------------------------------------- REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM 41 - --------------------------------------------------------------- TRUSTEES AND OFFICERS 42 - --------------------------------------------------------------- BOARD REVIEW OF INVESTMENT ADVISORY AGREEMENT 48 - --------------------------------------------------------------- PROXY VOTING POLICIES AND INFORMATION 53 - --------------------------------------------------------------- QUARTERLY PORTFOLIO DISCLOSURE 53 - --------------------------------------------------------------- FEDERAL TAX INFORMATION 53 - --------------------------------------------------------------- MFS(R) PRIVACY NOTICE 54 - --------------------------------------------------------------- CONTACT INFORMATION BACK COVER - --------------------------------------------------------------- Fund objective: Seeks to provide capital appreciation. THE REPORT IS PREPARED FOR THE GENERAL INFORMATION OF SHAREHOLDERS. IT IS AUTHORIZED FOR DISTRIBUTION TO PROSPECTIVE INVESTORS ONLY WHEN PRECEDED OR ACCOMPANIED BY A CURRENT PROSPECTUS. - ------------------------------------------------------------------------------- NOT FDIC INSURED o MAY LOSE VALUE o NO BANK OR CREDIT UNION GUARANTEE o NOT A DEPOSIT o NOT INSURED BY ANY FEDERAL GOVERNMENT AGENCY OR NCUA/NCUSIF - ------------------------------------------------------------------------------- 8/31/06 AGF-ANN LETTER FROM THE CEO [Photo of Robert J. Manning] Dear Shareholders: The story is as old as the tortoise and the hare, but we believe it is still relevant today -- "slow and steady" is the way to go when it comes to investing. While financial markets will naturally ebb and flow over time, investors who remain committed to a long-term investment strategy are more likely to achieve their goals than those who consistently chase short-term performance. The first half of 2006 brought a high degree of fluctuation in markets around the globe as varying economic factors pulled markets in opposite directions. The global economy, for example, continued to grow at its fastest pace in three decades -- spurred by increased international trade, good job growth, and wage increases. At the same time, central banks around the world raised interest rates in sync in a collaborative attempt to curb inflation. While this was a positive development in some regions, in other cases, economic and market gains were tempered. What does all of this mean to you as an investor? If you're focused on the long term, these global developments become part of a longer cycle instead of one-time events that can have a significant impact on your portfolio. At MFS(R), our investment management process -- honed over 80 years -- combines a unique teamwork approach with an unwavering focus on helping you realize your long-term financial goals. We believe in a three-pronged investment strategy: o ALLOCATE holdings across the major asset classes -- including stocks, bonds, and cash. o DIVERSIFY within each class to take advantage of different market segments and investing styles. o REBALANCE assets regularly to maintain a desired asset allocation. Of course, these strategies cannot guarantee a profit or protect against a loss. Investing and planning for the long term requires diligence and patience, two traits that in our experience are essential to capitalizing on the many opportunities the financial markets can offer -- through both up and down economic cycles. Respectfully, /s/ Robert J. Manning Robert J. Manning Chief Executive Officer and Chief Investment Officer MFS Investment Management(R) October 13, 2006 The opinions expressed in this letter are subject to change, may not be relied upon for investment advice, and no forecasts can be guaranteed. PORTFOLIO COMPOSITION PORTFOLIO STRUCTURE Common Stocks 97.1% Cash & Other Net Assets 2.9% TOP TEN HOLDINGS Electronic Arts, Inc. 3.6% - ----------------------------------------------------- Adobe Systems, Inc. 3.5% - ----------------------------------------------------- First Data Corp. 3.3% - ----------------------------------------------------- Cisco Systems, Inc. 2.7% - ----------------------------------------------------- Allergan, Inc. 2.6% - ----------------------------------------------------- Monsanto Co. 2.6% - ----------------------------------------------------- Roche Holding AG 2.6% - ----------------------------------------------------- American Tower Corp., "A" 2.4% - ----------------------------------------------------- News Corp., "A" 2.4% - ----------------------------------------------------- PepsiCo, Inc. 2.3% - ----------------------------------------------------- EQUITY SECTORS Technology 20.4% - ----------------------------------------------------- Health Care 20.1% - ----------------------------------------------------- Financial Services 11.0% - ----------------------------------------------------- Leisure 9.2% - ----------------------------------------------------- Consumer Staples 6.8% - ----------------------------------------------------- Industrial Goods & Services 6.6% - ----------------------------------------------------- Special Products & Services 6.5% - ----------------------------------------------------- Energy 5.4% - ----------------------------------------------------- Basic Materials 4.0% - ----------------------------------------------------- Utilities & Communications 3.7% - ----------------------------------------------------- Retailing 2.3% - ----------------------------------------------------- Autos & Housing 1.1% - ----------------------------------------------------- Percentages are based on net assets as of 8/31/06. The portfolio is actively managed and current holdings may be different. MANAGEMENT REVIEW SUMMARY OF RESULTS For the twelve months ended August 31, 2006, Class A shares of the MFS Strategic Growth Fund provided a total return of 0.16%, at net asset value. This compares with a return of 3.68% for the fund's benchmark, the Russell 1000 Growth Index. DETRACTORS FROM PERFORMANCE Security selection and, to a lesser extent, our overweighted position in the technology sector held back relative performance over the period. Our holdings in network equipment companies Juniper Networks and Cisco Systems, chip maker Marvell Technology Group and global telecommunications equipment company Nortel Networks* were among the fund's top detractors. Marvell and Nortel are not benchmark constituents. Juniper's shares have been under pressure because earlier in the year the company lowered its revenue guidance for the first half of 2006. Later in the reporting period, the company delayed its second quarter filing as a result of investigations into its stock options practices. The company also guided down its outlook for the second half of the year. Our underweighting of the industrial goods and services sector also hurt relative returns. Industrial automation and control products manufacturer Rockwell Automation was the top detractor in this sector. Rockwell's disappointing first quarter in 2006 appears to have caused some concern in the market. Although stock selection in the energy sector had a negative impact on relative performance, no individual stocks within the sector were among the fund's top detractors for the period. Securities in other sectors that hurt relative results included online auctioneer eBay, multimedia image provider Getty Images*, high-end stereo and audio equipment manufacturer Harman International, cardiovascular medical devices maker St. Jude Medical*, and pharmaceutical company Wyeth*. CONTRIBUTORS TO PERFORMANCE Stock selection in the leisure sector contributed to the fund's relative performance. Casino operator Las Vegas Sands was the top performer within this sector. The firm increased earnings and revenues in the first quarter of 2006, due in part to growth in its Sands Macau operations. A combination of stock selection and an overweighted position in the utilities and communications sector benefited relative returns. Leading the way was broadcast and communication tower firm American Tower. The company posted earnings and revenues for the first and second quarters of 2006 that exceeded expectations. Stock selection in the basic materials sector also aided relative performance, although no individual holdings within the sector were among the fund's top contributors for the period. Although the technology sector was a detractor from relative returns overall, some of our technology holdings were among the fund's top contributors, including cell phone manufacturer Nokia* and electronics manufacturer Samsung (neither of which are benchmark constituents). Holdings in Flash memory storage products maker SanDisk also boosted relative performance. SanDisk has been able to drive costs down faster than price declines and, we believe, the company's acquisition of M-Systems could secure royalties of next generation flash cards. Our underweighted position in poor-performing semiconductor company Intel also aided results. Individual stocks in other sectors that contributed to relative results included biotech firms Gilead Sciences and Celgene, pharmaceutical company Roche Holding (not a benchmark constituent), and technology consulting and services provider Cognizant Technology. During the reporting period, our currency exposure was a contributor to the fund's relative performance. All of MFS' investment decisions are driven by the fundamentals of each individual opportunity and, as such, it is common for our portfolios to have different currency exposure than the benchmark. Respectfully, Eric B. Fischman Portfolio Manager *Security was not held in the portfolio at period end. The views expressed in this report are those of the portfolio manager only through the end of the period of the report as stated on the cover and do not necessarily reflect the views of MFS or any other person in the MFS organization. These views are subject to change at any time based on market and other conditions, and MFS disclaims any responsibility to update such views. These views may not be relied upon as investment advice or an indication of trading intent on behalf of any MFS portfolio. References to specific securities are not recommendations of such securities, and may not be representative of any MFS portfolio's current or future investments. PERFORMANCE SUMMARY THROUGH 8/31/06 The following chart illustrates the historical performance of the fund's Class A shares in comparison to its benchmark. Performance results include the deduction of the maximum applicable sales charge and reflect the percentage change in net asset value, including reinvestment of dividends and capital gains distributions. The performance of other share classes will be greater than or less than that of the class depicted below. Benchmark comparisons are unmanaged; do not reflect sales charges, commissions or expenses; and cannot be invested in directly. (See Notes to Performance Summary.) PERFORMANCE DATA SHOWN REPRESENTS PAST PERFORMANCE AND IS NO GUARANTEE OF FUTURE RESULTS. INVESTMENT RETURN AND PRINCIPAL VALUE FLUCTUATE SO YOUR SHARES, WHEN SOLD, MAY BE WORTH MORE OR LESS THAN THE ORIGINAL COST; CURRENT PERFORMANCE MAY BE LOWER OR HIGHER THAN QUOTED. FOR MOST RECENT MONTH-END PERFORMANCE, PLEASE VISIT MFS.COM. (FOR THE MOST RECENT MONTH-END PERFORMANCE FOR CLASS I SHARES CALL 1-800-343-2829.) THE PERFORMANCE SHOWN DOES NOT REFLECT THE DEDUCTION OF TAXES, IF ANY, THAT A SHAREHOLDER WOULD PAY ON FUND DISTRIBUTIONS OR THE REDEMPTION OF FUND SHARES. GROWTH OF A HYPOTHETICAL $10,000 INVESTMENT MFS Strategic Russell Growth Fund 1000 Growth - Class A Index 8/96 $ 9,425 $10,000 8/97 15,036 13,937 8/98 17,002 15,087 8/99 26,250 22,379 8/00 38,635 29,867 8/01 22,049 16,330 8/02 16,162 12,710 8/03 19,088 14,499 8/04 19,146 15,275 8/05 21,611 17,130 8/06 21,646 17,759 TOTAL RETURNS THROUGH 8/31/06 AVERAGE ANNUAL WITHOUT SALES CHARGE Share class Class inception date 1-yr 5-yr 10-yr - ----------------------------------------------------------------------------- A 1/02/96 0.16% -0.37% 8.67% - ----------------------------------------------------------------------------- B 4/11/97 -0.45% -1.00% 8.00% - ----------------------------------------------------------------------------- C 4/11/97 -0.50% -1.01% 8.02% - ----------------------------------------------------------------------------- I 1/02/97 0.52% -0.02% 9.02% - ----------------------------------------------------------------------------- R 12/31/02 0.05% -0.47% 8.61% - ----------------------------------------------------------------------------- R1 4/01/05 -0.62% -0.60% 8.55% - ----------------------------------------------------------------------------- R2 4/01/05 -0.22% -0.50% 8.60% - ----------------------------------------------------------------------------- R3 10/31/03 -0.16% -0.57% 8.56% - ----------------------------------------------------------------------------- R4 4/01/05 0.11% -0.39% 8.66% - ----------------------------------------------------------------------------- R5 4/01/05 0.37% -0.30% 8.70% - ----------------------------------------------------------------------------- 529A 7/31/02 -0.05% -0.55% 8.57% - ----------------------------------------------------------------------------- 529B 7/31/02 -0.73% -1.10% 8.27% - ----------------------------------------------------------------------------- 529C 7/31/02 -0.73% -1.10% 8.27% - ----------------------------------------------------------------------------- AVERAGE ANNUAL Comparative benchmark - ----------------------------------------------------------------------------- Russell 1000 Growth Index (f) 3.68% 1.69% 5.91% - ----------------------------------------------------------------------------- AVERAGE ANNUAL WITH SALES CHARGE Share class - ----------------------------------------------------------------------------- A -5.60% -1.54% 8.03% With Initial Sales Charge (5.75%) - ----------------------------------------------------------------------------- B -4.43% -1.40% 8.00% With CDSC (Declining over six years from 4% to 0%) (x) - ----------------------------------------------------------------------------- C -1.50% -1.01% 8.02% With CDSC (1% for 12 months) (x) - ----------------------------------------------------------------------------- 529A -5.80% -1.72% 7.93% With Initial Sales Charge (5.75%) - ----------------------------------------------------------------------------- 529B -4.70% -1.48% 8.27% With CDSC (Declining over six years from 4% to 0%) (x) - ----------------------------------------------------------------------------- 529C -1.72% -1.10% 8.27% With CDSC (1% for 12 months) (x) - ----------------------------------------------------------------------------- Class I, R, R1, R2, R3, R4, and R5 shares do not have a sales charge. Please see Notes to Performance Summary for more details. CDSC - Contingent Deferred Sales Charge. (f) Source: FactSet Research Systems Inc. (x) Assuming redemption at the end of the applicable period. INDEX DEFINITION Russell 1000 Growth Index - constructed to provide a comprehensive barometer for growth securities in the large-cap segment of the U.S. equity universe. Companies in this index generally have higher price-to-book ratios and higher forecasted growth values. It is not possible to invest directly in an index. NOTES TO PERFORMANCE SUMMARY Class R shares are available only to existing Class R shareholders. Class I shares are only available to certain eligible investors, and Class R1, R2, R3, R4, and R5 shares are only available to certain retirement plans. Class 529 shares are only available in conjunction with qualified tuition programs, such as the MFS 529 Savings Plan. There also is an additional annual fee, which is detailed in the program description, on qualified tuition programs. If this fee was reflected, the performance for Class 529 shares would have been lower. This annual fee is waived for Oregon residents and for those accounts with assets of $25,000 or more. Performance for share classes offered after Class A shares includes the performance of the fund's Class A shares for periods prior to their offering. This blended class performance has been adjusted to take into account differences in sales loads, if any, applicable to these share classes, but has not been adjusted to take into account differences in class specific operating expenses (such as Rule 12b-1 fees). Compared to performance these share classes would have experienced had they been offered for the entire period, the use of blended performance generally results in higher performance for share classes with higher operating expenses than the share class to which it is blended, and lower performance for share classes with lower operating expenses than the share class to which it is blended. Performance results reflect any applicable expense subsidies and waivers in effect during the periods shown. Without such subsidies and waivers the fund's performance results would be less favorable. Please see the prospectus and financial statements for complete details. From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower. EXPENSE TABLE Fund expenses borne by the shareholders during the period, March 1, 2006 through August 31, 2006. As a shareholder of the fund, you incur two types of costs: (1) transaction costs, including sales charges (loads) on certain purchase or redemption payments and redemption fees on certain exchanges and redemptions, and (2) ongoing costs, including management fees; distribution and service (12b-1) fees; and other fund expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in the fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period March 1, 2006 through August 31, 2006. ACTUAL EXPENSES The first line for each share class in the following table provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number in the first line under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. HYPOTHETICAL EXAMPLE FOR COMPARISON PURPOSES The second line for each share class in the following table provides information about hypothetical account values and hypothetical expenses based on the fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs, such as sales charges (loads) or redemption fees. Therefore, the second line for each share class in the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher. - ------------------------------------------------------------------------------- Expenses Paid During Annualized Beginning Ending Period(p) Share Expense Account Value Account Value 3/01/06- Class Ratio 3/01/06 8/31/06 8/31/06 - -------------------------------------------------------------------------------- Actual 1.25% $1,000.00 $952.80 $6.15 A ------------------------------------------------------------------------ Hypothetical (h) 1.25% $1,000.00 $1,018.90 $6.36 - -------------------------------------------------------------------------------- Actual 1.91% $1,000.00 $949.80 $9.39 B ------------------------------------------------------------------------ Hypothetical (h) 1.91% $1,000.00 $1,015.58 $9.70 - -------------------------------------------------------------------------------- Actual 1.92% $1,000.00 $949.90 $9.44 C ------------------------------------------------------------------------ Hypothetical (h) 1.92% $1,000.00 $1,015.53 $9.75 - -------------------------------------------------------------------------------- Actual 0.90% $1,000.00 $954.50 $4.43 I ------------------------------------------------------------------------ Hypothetical (h) 0.90% $1,000.00 $1,020.67 $4.58 - -------------------------------------------------------------------------------- Actual 1.38% $1,000.00 $952.10 $6.79 R ------------------------------------------------------------------------ Hypothetical (h) 1.38% $1,000.00 $1,018.25 $7.02 - -------------------------------------------------------------------------------- Actual 2.02% $1,000.00 $949.20 $9.92 R1 ------------------------------------------------------------------------ Hypothetical (h) 2.02% $1,000.00 $1,015.02 $10.26 - -------------------------------------------------------------------------------- Actual 1.66% $1,000.00 $951.00 $8.16 R2 ------------------------------------------------------------------------ Hypothetical (h) 1.66% $1,000.00 $1,016.84 $8.44 - -------------------------------------------------------------------------------- Actual 1.55% $1,000.00 $951.30 $7.62 R3 ------------------------------------------------------------------------ Hypothetical (h) 1.55% $1,000.00 $1,017.39 $7.88 - -------------------------------------------------------------------------------- Actual 1.31% $1,000.00 $952.30 $6.45 R4 ------------------------------------------------------------------------ Hypothetical (h) 1.31% $1,000.00 $1,018.60 $6.67 - -------------------------------------------------------------------------------- Actual 1.02% $1,000.00 $953.90 $5.02 R5 ------------------------------------------------------------------------ Hypothetical (h) 1.02% $1,000.00 $1,020.06 $5.19 - -------------------------------------------------------------------------------- Actual 1.50% $1,000.00 $951.90 $7.38 529A ------------------------------------------------------------------------ Hypothetical (h) 1.50% $1,000.00 $1,017.64 $7.63 - -------------------------------------------------------------------------------- Actual 2.15% $1,000.00 $948.40 $10.56 529B ------------------------------------------------------------------------ Hypothetical (h) 2.15% $1,000.00 $1,014.37 $10.92 - -------------------------------------------------------------------------------- Actual 2.16% $1,000.00 $948.90 $10.61 529C ------------------------------------------------------------------------ Hypothetical (h) 2.16% $1,000.00 $1,014.32 $10.97 - -------------------------------------------------------------------------------- (h) 5% class return per year before expenses. (p) Expenses paid is equal to each class' annualized expense ratio, as shown above, multiplied by the average account value over the period, multiplied by the number of days in the period, divided by the number of days in the year. Expenses paid do not include any applicable sales charges (loads) or redemption fees. If these transaction costs had been included, your costs would have been higher. PORTFOLIO OF INVESTMENTS 8/31/06 The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes. Common Stocks - 97.1% - ------------------------------------------------------------------------------------------------------- ISSUER SHARES/PAR VALUE ($) - ------------------------------------------------------------------------------------------------------- Aerospace - 4.2% - ------------------------------------------------------------------------------------------------------- Lockheed Martin Corp. 404,100 $ 33,378,660 United Technologies Corp. 507,700 31,837,867 -------------- $ 65,216,527 - ------------------------------------------------------------------------------------------------------- Automotive - 1.1% - ------------------------------------------------------------------------------------------------------- Harman International Industries, Inc. 199,000 $ 16,142,880 - ------------------------------------------------------------------------------------------------------- Biotechnology - 6.9% - ------------------------------------------------------------------------------------------------------- Amgen, Inc. (n) 299,100 $ 20,317,863 Celgene Corp. (l)(n) 392,200 15,958,618 Genentech, Inc. (n) 236,100 19,482,972 Genzyme Corp. (n) 410,180 27,166,221 Gilead Sciences, Inc. (n) 270,360 17,140,824 Millipore Corp. (n) 100,400 6,443,672 -------------- $ 106,510,170 - ------------------------------------------------------------------------------------------------------- Broadcasting - 3.1% - ------------------------------------------------------------------------------------------------------- Grupo Televisa S.A., ADR (l) 577,840 $ 11,002,074 News Corp., "A" 1,916,800 36,476,704 -------------- $ 47,478,778 - ------------------------------------------------------------------------------------------------------- Brokerage & Asset Managers - 4.4% - ------------------------------------------------------------------------------------------------------- Charles Schwab Corp. 1,117,100 $ 18,219,901 Chicago Mercantile Exchange Holdings, Inc. 78,800 34,672,000 Goldman Sachs Group, Inc. 103,100 15,325,815 -------------- $ 68,217,716 - ------------------------------------------------------------------------------------------------------- Business Services - 5.4% - ------------------------------------------------------------------------------------------------------- Amdocs Ltd. (n) 416,690 $ 15,813,386 Cognizant Technology Solutions Corp., "A" (n) 241,100 16,855,301 First Data Corp. 1,166,500 50,124,505 -------------- $ 82,793,192 - ------------------------------------------------------------------------------------------------------- Chemicals - 2.6% - ------------------------------------------------------------------------------------------------------- Monsanto Co. 835,800 $ 39,650,352 - ------------------------------------------------------------------------------------------------------- Computer Software - 3.5% - ------------------------------------------------------------------------------------------------------- Adobe Systems, Inc. (n) 1,674,616 $ 54,324,543 - ------------------------------------------------------------------------------------------------------- Computer Software - Systems - 1.3% - ------------------------------------------------------------------------------------------------------- Apple Computer, Inc. (n) 304,400 $ 20,653,540 - ------------------------------------------------------------------------------------------------------- Consumer Goods & Services - 2.6% - ------------------------------------------------------------------------------------------------------- Colgate-Palmolive Co. 381,700 $ 22,848,562 eBay, Inc. (n) 609,900 16,991,814 -------------- $ 39,840,376 - ------------------------------------------------------------------------------------------------------- Electrical Equipment - 1.8% - ------------------------------------------------------------------------------------------------------- Rockwell Automation, Inc. 486,000 $ 27,400,680 - ------------------------------------------------------------------------------------------------------- Electronics - 7.2% - ------------------------------------------------------------------------------------------------------- Intel Corp. 1,095,300 $ 21,402,162 Linear Technology Corp. 239,100 8,131,791 Marvell Technology Group Ltd. (n) 1,447,900 25,352,729 Samsung Electronics Co. Ltd., GDR 67,020 22,786,800 SanDisk Corp. (n) 547,600 32,264,592 -------------- $ 109,938,074 - ------------------------------------------------------------------------------------------------------- Energy - Independent - 1.1% - ------------------------------------------------------------------------------------------------------- Occidental Petroleum Corp. 330,600 $ 16,857,294 - ------------------------------------------------------------------------------------------------------- Food & Beverages - 3.8% - ------------------------------------------------------------------------------------------------------- Kellogg Co. 467,800 $ 23,717,460 PepsiCo, Inc. 541,100 35,323,008 -------------- $ 59,040,468 - ------------------------------------------------------------------------------------------------------- Gaming & Lodging - 2.5% - ------------------------------------------------------------------------------------------------------- International Game Technology 511,000 $ 19,765,480 Las Vegas Sands Corp. (n) 260,300 18,171,543 -------------- $ 37,937,023 - ------------------------------------------------------------------------------------------------------- General Merchandise - 2.3% - ------------------------------------------------------------------------------------------------------- Costco Wholesale Corp. 457,000 $ 21,383,030 Kohl's Corp. (n) 214,700 13,420,897 -------------- $ 34,803,927 - ------------------------------------------------------------------------------------------------------- Internet - 3.6% - ------------------------------------------------------------------------------------------------------- Google, Inc., "A" (n) 70,900 $ 26,837,777 Yahoo!, Inc. (n) 987,200 28,451,104 -------------- $ 55,288,881 - ------------------------------------------------------------------------------------------------------- Leisure & Toys - 3.6% - ------------------------------------------------------------------------------------------------------- Electronic Arts, Inc. (n) 1,081,130 $ 55,105,196 - ------------------------------------------------------------------------------------------------------- Machinery & Tools - 0.6% - ------------------------------------------------------------------------------------------------------- Deere & Co. 110,800 $ 8,653,480 - ------------------------------------------------------------------------------------------------------- Major Banks - 1.3% - ------------------------------------------------------------------------------------------------------- Bank of New York Co., Inc. 585,600 $ 19,764,000 - ------------------------------------------------------------------------------------------------------- Medical & Health Technology & Services - 1.3% - ------------------------------------------------------------------------------------------------------- Caremark Rx, Inc. 350,700 $ 20,319,558 - ------------------------------------------------------------------------------------------------------- Medical Equipment - 3.1% - ------------------------------------------------------------------------------------------------------- Advanced Medical Optics, Inc. (l)(n) 479,140 $ 23,070,591 Cytyc Corp. (l)(n) 1,017,400 24,305,686 -------------- $ 47,376,277 - ------------------------------------------------------------------------------------------------------- Metals & Mining - 1.4% - ------------------------------------------------------------------------------------------------------- BHP Billiton Ltd., ADR (l) 504,200 $ 21,226,820 - ------------------------------------------------------------------------------------------------------- Network & Telecom - 4.8% - ------------------------------------------------------------------------------------------------------- Cisco Systems, Inc. (n) 1,897,300 $ 41,721,627 Juniper Networks, Inc. (n) 837,600 12,287,592 QUALCOMM, Inc. 534,900 20,149,683 -------------- $ 74,158,902 - ------------------------------------------------------------------------------------------------------- Oil Services - 4.3% - ------------------------------------------------------------------------------------------------------- GlobalSantaFe Corp. 422,900 $ 20,815,138 Schlumberger Ltd. 492,500 30,190,250 Transocean, Inc. (n) 222,100 14,825,175 -------------- $ 65,830,563 - ------------------------------------------------------------------------------------------------------- Other Banks & Diversified Financials - 5.3% - ------------------------------------------------------------------------------------------------------- American Express Co. 545,600 $ 28,665,824 State Street Corp. 402,800 24,893,040 UBS AG 493,400 28,010,318 -------------- $ 81,569,182 - ------------------------------------------------------------------------------------------------------- Pharmaceuticals - 8.8% - ------------------------------------------------------------------------------------------------------- Allergan, Inc. 348,800 $ 39,958,528 GlaxoSmithKline PLC 835,600 23,685,006 Johnson & Johnson 504,600 32,627,436 Roche Holding AG (l) 214,980 39,648,022 -------------- $ 135,918,992 - ------------------------------------------------------------------------------------------------------- Telecommunications - Wireless - 1.3% - ------------------------------------------------------------------------------------------------------- America Movil S.A. de C.V., "L", ADR 538,600 $ 20,095,166 - ------------------------------------------------------------------------------------------------------- Telephone Services - 2.4% - ------------------------------------------------------------------------------------------------------- American Tower Corp., "A" (l)(n) 1,038,000 $ 37,222,680 - ------------------------------------------------------------------------------------------------------- Tobacco - 1.5% - ------------------------------------------------------------------------------------------------------- Altria Group, Inc. 269,500 $ 22,511,335 - ------------------------------------------------------------------------------------------------------- TOTAL COMMON STOCKS (IDENTIFIED COST, $1,480,166,940) $1,491,846,572 - ------------------------------------------------------------------------------------------------------- Convertible Bonds - 0.0% - ------------------------------------------------------------------------------------------------------- Electronics - 0.0% - ------------------------------------------------------------------------------------------------------- Candescent Technologies Corp., 8%, 2003 (d)(z) $ 10,000,000 $ 0 - ------------------------------------------------------------------------------------------------------- TOTAL CONVERTIBLE BONDS (IDENTIFIED COST, $--) $ 0 - ------------------------------------------------------------------------------------------------------- Short-Term Obligations - 3.0% - ------------------------------------------------------------------------------------------------------- General Electric Co., 5.27%, due 9/01/06, at Amortized Cost and Value (y) $ 45,304,000 $ 45,304,000 - ------------------------------------------------------------------------------------------------------- Collateral for Securities Loaned - 4.5% - ------------------------------------------------------------------------------------------------------- Navigator Securities Lending Prime Portfolio, at Cost and Net Asset Value 68,525,437 $ 68,525,437 - ------------------------------------------------------------------------------------------------------- TOTAL INVESTMENTS (IDENTIFIED COST, $1,593,996,377) (k) $1,605,676,009 - ------------------------------------------------------------------------------------------------------- Other Assets, Less Liabilities - (4.6)% (69,954,434) - ------------------------------------------------------------------------------------------------------- NET ASSETS - 100.0% $1,535,721,575 - ------------------------------------------------------------------------------------------------------- (d) Non-income producing security - in default. (k) As of August 31, 2006, the fund had one security that was fair valued, aggregating $0 and 0.00% of market value, in accordance with the policies adopted by the Board of Trustees. (l) All or a portion of this security is on loan. (n) Non-income producing security. (y) The rate shown represents an annualized yield at time of purchase. (z) Restricted securities are not registered under the Securities Act of 1933 and are subject to legal restrictions on resale. These securities generally may be resold in transactions exempt from registration or to the public if the securities are subsequently registered. Disposal of these securities may involve time-consuming negotiations and prompt sale at an acceptable price may be difficult. The fund holds the following restricted security: CURRENT ACQUISITION ACQUISITION MARKET TOTAL % OF RESTRICTED SECURITIES DATE COST VALUE NET ASSETS - --------------------------------------------------------------------------------------------------------------- Candescent Technologies Corp., 8%, 2003 3/07/00 $8,000,000 $0.00 0.00% The following abbreviations are used in this report and are defined: ADR American Depository Receipt GDR Global Depository Receipt SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENT OF ASSETS AND LIABILITIES At 8/31/06 This statement represents your fund's balance sheet, which details the assets and liabilities comprising the total value of the fund. ASSETS - ------------------------------------------------------------------------------------------------------- Investments, at value, including $66,732,419 of securities on loan (identified cost, $1,593,996,377) $1,605,676,009 Cash 13,265 Receivable for fund shares sold 738,040 Interest and dividends receivable 1,075,374 Other assets 11,965 - ------------------------------------------------------------------------------------------------------- Total assets $1,607,514,653 - ------------------------------------------------------------------------------------------------------- LIABILITIES - ------------------------------------------------------------------------------------------------------- Payable for fund shares reacquired $2,563,487 Collateral for securities loaned, at value 68,525,437 Payable to affiliates Management fee 54,715 Shareholder servicing costs 193,130 Distribution and service fees 25,368 Administrative services fee 1,498 Program manager fees 14 Retirement plan administration and services fees 26 Payable for independent trustees' compensation 61,113 Accrued expenses and other liabilities 368,290 - ------------------------------------------------------------------------------------------------------- Total liabilities $71,793,078 - ------------------------------------------------------------------------------------------------------- Net assets $1,535,721,575 - ------------------------------------------------------------------------------------------------------- NET ASSETS CONSIST OF - ------------------------------------------------------------------------------------------------------- Paid-in capital $2,887,085,827 Unrealized appreciation (depreciation) on investments and translation of assets and liabilities in foreign currencies 11,682,584 Accumulated net realized gain (loss) on investments and foreign currency transactions (1,361,600,768) Accumulated net investment loss (1,446,068) - ------------------------------------------------------------------------------------------------------- Net assets $1,535,721,575 - ------------------------------------------------------------------------------------------------------- Shares of beneficial interest outstanding 81,496,376 - ------------------------------------------------------------------------------------------------------- Statement of Assets and Liabilities - continued Class A shares - ------------------------------------------------------------------------------------------------------- Net assets $414,113,231 Shares outstanding 22,043,952 - ------------------------------------------------------------------------------------------------------- Net asset value per share $18.79 - ------------------------------------------------------------------------------------------------------- Offering price per share (100/94.25Xnet asset value per share) $19.94 - ------------------------------------------------------------------------------------------------------- Class B shares - ------------------------------------------------------------------------------------------------------- Net assets $247,487,541 Shares outstanding 13,907,178 - ------------------------------------------------------------------------------------------------------- Net asset value and offering price per share $17.80 - ------------------------------------------------------------------------------------------------------- Class C shares - ------------------------------------------------------------------------------------------------------- Net assets $66,663,887 Shares outstanding 3,739,506 - ------------------------------------------------------------------------------------------------------- Net asset value and offering price per share $17.83 - ------------------------------------------------------------------------------------------------------- Class I shares - ------------------------------------------------------------------------------------------------------- Net assets $801,582,863 Shares outstanding 41,486,603 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $19.32 - ------------------------------------------------------------------------------------------------------- Class R shares - ------------------------------------------------------------------------------------------------------- Net assets $2,581,543 Shares outstanding 138,129 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $18.69 - ------------------------------------------------------------------------------------------------------- Class R1 shares - ------------------------------------------------------------------------------------------------------- Net assets $361,508 Shares outstanding 20,352 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $17.76 - ------------------------------------------------------------------------------------------------------- Class R2 shares - ------------------------------------------------------------------------------------------------------- Net assets $751,051 Shares outstanding 42,079 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $17.85 - ------------------------------------------------------------------------------------------------------- Class R3 shares - ------------------------------------------------------------------------------------------------------- Net assets $1,072,881 Shares outstanding 57,768 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $18.57 - ------------------------------------------------------------------------------------------------------- Statement of Assets and Liabilities - continued Class R4 shares - ------------------------------------------------------------------------------------------------------- Net assets $52,207 Shares outstanding 2,781 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $18.77 - ------------------------------------------------------------------------------------------------------- Class R5 shares - ------------------------------------------------------------------------------------------------------- Net assets $52,424 Shares outstanding 2,780 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $18.85 - ------------------------------------------------------------------------------------------------------- Class 529A shares - ------------------------------------------------------------------------------------------------------- Net assets $531,364 Shares outstanding 28,544 - ------------------------------------------------------------------------------------------------------- Net asset value per share $18.62 - ------------------------------------------------------------------------------------------------------- Offering price per share (100/94.25Xnet asset value per share) $19.76 - ------------------------------------------------------------------------------------------------------- Class 529B shares - ------------------------------------------------------------------------------------------------------- Net assets $163,996 Shares outstanding 9,301 - ------------------------------------------------------------------------------------------------------- Net asset value and offering price per share $17.63 - ------------------------------------------------------------------------------------------------------- Class 529C shares - ------------------------------------------------------------------------------------------------------- Net assets $307,079 Shares outstanding 17,403 - ------------------------------------------------------------------------------------------------------- Net asset value and offering price per share $17.65 - ------------------------------------------------------------------------------------------------------- Shares outstanding are rounded for presentation purposes. On sales of $50,000 or more, the offering prices of Class A and Class 529A shares are reduced. A contingent deferred sales charge may be imposed on redemptions of Class A, Class B, Class C, Class 529B, and Class 529C shares. SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENT OF OPERATIONS Year ended 8/31/06 This statement describes how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations. NET INVESTMENT LOSS - ------------------------------------------------------------------------------------------------------- Income Dividends $9,913,951 Interest 2,169,381 Foreign taxes withheld (343,944) - ------------------------------------------------------------------------------------------------------- Total investment income $11,739,388 - ------------------------------------------------------------------------------------------------------- Expenses Management fee $12,038,469 Distribution and service fees 5,701,848 Program manager fees 2,571 Shareholder servicing costs 3,011,685 Administrative services fee 215,758 Retirement plan administration and services fees 5,698 Independent trustees' compensation 40,245 Custodian fee 448,501 Shareholder communications 305,205 Auditing fees 34,872 Legal fees 26,000 Miscellaneous 236,830 - ------------------------------------------------------------------------------------------------------- Total expenses $22,067,682 - ------------------------------------------------------------------------------------------------------- Fees paid indirectly (155,583) Reduction of expenses by investment adviser (1,616,002) - ------------------------------------------------------------------------------------------------------- Net expenses $20,296,097 - ------------------------------------------------------------------------------------------------------- Net investment loss $(8,556,709) - ------------------------------------------------------------------------------------------------------- Statement of Operations - continued REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS - ------------------------------------------------------------------------------------------------------- Realized gain (loss) (identified cost basis) Investment transactions $32,819,250 Foreign currency transactions (11,644) - ------------------------------------------------------------------------------------------------------- Net realized gain (loss) on investments and foreign currency transactions $32,807,606 - ------------------------------------------------------------------------------------------------------- Change in unrealized appreciation (depreciation) Investments $(19,500,441) Translation of assets and liabilities in foreign currencies 2,952 - ------------------------------------------------------------------------------------------------------- Net unrealized gain (loss) on investments and foreign currency translation $(19,497,489) - ------------------------------------------------------------------------------------------------------- Net realized and unrealized gain (loss) on investments and foreign currency $13,310,117 - ------------------------------------------------------------------------------------------------------- Change in net assets from operations $4,753,408 - ------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENTS OF CHANGES IN NET ASSETS These statements describe the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions. YEARS ENDED 8/31 -------------------------------------- 2006 2005 CHANGE IN NET ASSETS FROM OPERATIONS - ------------------------------------------------------------------------------------------------------- Net investment loss $(8,556,709) $(923,238) Net realized gain (loss) on investments and foreign currency transactions 32,807,606 62,251,745 Net unrealized gain (loss) on investments and foreign currency translation (19,497,489) 125,826,686 - ------------------------------------------------------------------------------------------------------- Change in net assets from operations $4,753,408 $187,155,193 - ------------------------------------------------------------------------------------------------------- Change in net assets from fund share transactions $(97,585,909) $(77,169,494) - ------------------------------------------------------------------------------------------------------- Redemption fees $-- $755 - ------------------------------------------------------------------------------------------------------- Total change in net assets $(92,832,501) $109,986,454 - ------------------------------------------------------------------------------------------------------- NET ASSETS - ------------------------------------------------------------------------------------------------------- At beginning of period 1,628,554,076 1,518,567,622 At end of period (including accumulated net investment loss of $1,446,068 and $1,446,478, respectively) $1,535,721,575 $1,628,554,076 - ------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Statements FINANCIAL HIGHLIGHTS The financial highlights table is intended to help you understand the fund's financial performance for the past 5 years (or life of a particular share class, if shorter). Certain information reflects financial results for a single fund share. The total returns in the table represent the rate by which an investor would have earned (or lost) on an investment in the fund share class (assuming reinvestment of all distributions) held for the entire period. This information has been audited by the fund's independent registered public accounting firm, whose report, together with the fund's financial statements, are included in this report. CLASS A YEARS ENDED 8/31 ------------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $18.76 $16.62 $16.57 $14.03 $19.22 - ----------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ----------------------------------------------------------------------------------------------------------------------------- Net investment income (loss) (d) $(0.10) $0.01 $(0.08) $(0.07) $(0.13) Net realized and unrealized gain (loss) on investments and foreign currency 0.13 2.13 0.13 2.61 (4.97) - ----------------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.03 $2.14 $0.05 $2.54 $(5.10) - ----------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ----------------------------------------------------------------------------------------------------------------------------- From net realized gain on investments and foreign currency transactions $-- $-- $-- $-- $(0.09) - ----------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $18.79 $18.76 $16.62 $16.57 $14.03 - ----------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 0.16 12.88 0.30(b) 18.10(j) (26.70) - ----------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ----------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.36 1.38 1.37 1.41 1.45 Expenses after expense reductions (f) 1.27 1.28 1.32 N/A N/A Net investment income (loss) (0.53) 0.05 (0.46) (0.46) (0.74) Portfolio turnover 171 69 80 72 116 Net assets at end of period (000 Omitted) $414,113 $518,618 $563,761 $673,767 $731,283 - ----------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS B YEARS ENDED 8/31 ------------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $17.88 $15.95 $16.00 $13.65 $18.80 - ----------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ----------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.22) $(0.10) $(0.19) $(0.16) $(0.24) Net realized and unrealized gain (loss) on investments and foreign currency 0.14 2.03 0.14 2.51 (4.82) - ----------------------------------------------------------------------------------------------------------------------------- Total from investment operations $(0.08) $1.93 $(0.05) $2.35 $(5.06) - ----------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ----------------------------------------------------------------------------------------------------------------------------- From net realized gain on investments and foreign currency transactions $-- $-- $-- $-- $(0.09) - ----------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $17.80 $17.88 $15.95 $16.00 $13.65 - ----------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) (0.45) 12.10 (0.31)(b) 17.22(j) (27.08) - ----------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ----------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.02 2.02 2.02 2.06 2.10 Expenses after expense reductions (f) 1.92 1.92 1.97 N/A N/A Net investment loss (1.19) (0.60) (1.10) (1.12) (1.39) Portfolio turnover 171 69 80 72 116 Net assets at end of period (000 Omitted) $247,488 $381,085 $427,364 $505,090 $490,326 - ----------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS C YEARS ENDED 8/31 ------------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $17.92 $15.98 $16.03 $13.67 $18.84 - ----------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ----------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.22) $(0.10) $(0.19) $(0.16) $(0.24) Net realized and unrealized gain (loss) on investments and foreign currency 0.13 2.04 0.14 2.52 (4.84) - ----------------------------------------------------------------------------------------------------------------------------- Total from investment operations $(0.09) $1.94 $(0.05) $2.36 $(5.08) - ----------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ----------------------------------------------------------------------------------------------------------------------------- From net realized gain on investments and foreign currency transactions $-- $-- $-- $-- $(0.09) - ----------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $17.83 $17.92 $15.98 $16.03 $13.67 - ----------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) (0.50) 12.14 (0.31)(b) 17.26(j) (27.13) - ----------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ----------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.02 2.02 2.02 2.06 2.10 Expenses after expense reductions (f) 1.93 1.92 1.97 N/A N/A Net investment loss (1.19) (0.58) (1.10) (1.12) (1.39) Portfolio turnover 171 69 80 72 116 Net assets at end of period (000 Omitted) $66,664 $89,290 $114,023 $141,307 $148,930 - ----------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS I YEARS ENDED 8/31 ------------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $19.22 $16.97 $16.86 $14.24 $19.41 - ----------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ----------------------------------------------------------------------------------------------------------------------------- Net investment income (loss) (d) $(0.03) $0.07 $(0.01) $(0.01) $(0.07) Net realized and unrealized gain (loss) on investments and foreign currency 0.13 2.18 0.12 2.63 (5.01) - ----------------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.10 $2.25 $0.11 $2.62 $(5.08) - ----------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ----------------------------------------------------------------------------------------------------------------------------- From net realized gain on investments and foreign currency transactions $-- $-- $-- $-- $(0.09) - ----------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $19.32 $19.22 $16.97 $16.86 $14.24 - ----------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 0.52 13.26 0.65(b) 18.40(j) (26.37) - ----------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ----------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.02 1.01 1.01 1.06 1.10 Expenses after expense reductions (f) 0.92 0.91 0.96 N/A N/A Net investment income (loss) (0.17) 0.35 (0.06) (0.10) (0.39) Portfolio turnover 171 69 80 72 116 Net assets at end of period (000 Omitted) $801,583 $633,593 $405,006 $163,758 $26,193 - ----------------------------------------------------------------------------------------------------------------------------- CLASS R YEARS ENDED 8/31 ------------------------------------------------------------- 2006 2005 2004 2003(i) Net asset value, beginning of period $18.68 $16.58 $16.55 $13.92 - ------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.13) $(0.03) $(0.09) $(0.06) Net realized and unrealized gain (loss) on investments and foreign currency 0.14 2.13 0.12 2.69 - ------------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.01 $2.10 $0.03 $2.63 - ------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $18.69 $18.68 $16.58 $16.55 - ------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 0.05 12.67 0.18(b) 18.89(j)(n) - ------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.51 1.53 1.49 1.60(a) Expenses after expense reductions (f) 1.41 1.43 1.44 N/A Net investment loss (0.68) (0.16) (0.52) (0.60)(a) Portfolio turnover 171 69 80 72 Net assets at end of period (000 Omitted) $2,582 $3,784 $1,982 $221 - ------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R1 YEARS ENDED 8/31 ------------------------------- 2006 2005(i) Net asset value, beginning of period $17.87 $17.19 - ------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.23) $(0.08) Net realized and unrealized gain (loss) on investments and foreign currency 0.12 0.76 - ------------------------------------------------------------------------------------------------------------- Total from investment operations $(0.11) $0.68 - ------------------------------------------------------------------------------------------------------------- Net asset value, end of period $17.76 $17.87 - ------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) (0.62) 3.96(n) - ------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.22 2.23(a) Expenses after expense reductions (f) 2.03 2.13(a) Net investment loss (1.27) (1.06)(a) Portfolio turnover 171 69 Net assets at end of period (000 Omitted) $362 $204 - ------------------------------------------------------------------------------------------------------------- CLASS R2 YEARS ENDED 8/31 ------------------------------- 2006 2005(i) Net asset value, beginning of period $17.89 $17.19 - ------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.16) $(0.05) Net realized and unrealized gain (loss) on investments and foreign currency 0.12 0.75 - ------------------------------------------------------------------------------------------------------------- Total from investment operations $(0.04) $0.70 - ------------------------------------------------------------------------------------------------------------- Net asset value, end of period $17.85 $17.89 - ------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) (0.22) 4.07(n) - ------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.92 1.95(a) Expenses after expense reductions (f) 1.67 1.85(a) Net investment loss (0.89) (0.80)(a) Portfolio turnover 171 69 Net assets at end of period (000 Omitted) $751 $133 - ------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R3 YEARS ENDED 8/31 ----------------------------------------------- 2006 2005 2004(i) Net asset value, beginning of period $18.60 $16.55 $16.99 - --------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - --------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.16) $(0.10) $(0.10) Net realized and unrealized gain (loss) on investments and foreign currency 0.13 2.15 (0.34) - --------------------------------------------------------------------------------------------------------------------- Total from investment operations $(0.03) $2.05 $(0.44) - --------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $18.57 $18.60 16.55 - --------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) (0.16) 12.39 (2.59)(b)(n) - --------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - --------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.77 1.78 1.71(a) Expenses after expense reductions (f) 1.58 1.68 1.66(a) Net investment loss (0.83) (0.53) (0.74)(a) Portfolio turnover 171 69 80 Net assets at end of period (000 Omitted) $1,073 $822 $309 - --------------------------------------------------------------------------------------------------------------------- CLASS R4 YEARS ENDED 8/31 ------------------------------- 2006 2005(i) Net asset value, beginning of period $18.75 $17.98 - --------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - --------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.11) $(0.03) Net realized and unrealized gain (loss) on investments and foreign currency 0.13 0.80 - --------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.02 $0.77 - --------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $18.77 $18.75 - --------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 0.11 4.28(n) - --------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - --------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.43 1.45(a) Expenses after expense reductions (f) 1.33 1.35(a) Net investment loss (0.58) (0.37)(a) Portfolio turnover 171 69 Net assets at end of period (000 Omitted) $52 $52 - --------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R5 YEARS ENDED 8/31 ------------------------------- 2006 2005(i) Net asset value, beginning of period $18.78 $17.98 - --------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - --------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.06) $(0.01) Net realized and unrealized gain (loss) on investments and foreign currency 0.13 0.81 - --------------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.07 $0.80 - --------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $18.85 $18.78 - --------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 0.37 4.45(n) - --------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - --------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.13 1.15(a) Expenses after expense reductions (f) 1.03 1.05(a) Net investment loss (0.29) (0.07)(a) Portfolio turnover 171 69 Net assets at end of period (000 Omitted) $52 $52 - --------------------------------------------------------------------------------------------------------------------------- CLASS 529A YEARS ENDED 8/31 --------------------------------------------------------------------------- 2006 2005 2004 2003 2002(i) Net asset value, beginning of period $18.63 $16.55 $16.52 $14.03 $13.89 - ----------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ----------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.15) $(0.04) $(0.12) $(0.10) $(0.01) Net realized and unrealized gain (loss) on investments and foreign currency 0.14 2.12 0.15 2.59 0.15 - ----------------------------------------------------------------------------------------------------------------------------- Total from investment operations $(0.01) $2.08 $0.03 $2.49 $0.14 - ----------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $18.62 $18.63 $16.55 $16.52 $14.03 - ----------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) (0.05) 12.57 0.18(b) 17.75(j) 1.01(n) - ----------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ----------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.62 1.62 1.61 1.67 1.70(a) Expenses after expense reductions (f) 1.52 1.52 1.56 N/A N/A Net investment loss (0.77) (0.25) (0.68) (0.69) (0.74)(a) Portfolio turnover 171 69 80 72 116 Net assets at end of period (000 Omitted) $531 $481 $394 $225 $5 - ----------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS 529B YEARS ENDED 8/31 --------------------------------------------------------------------------- 2006 2005 2004 2003 2002(i) Net asset value, beginning of period $17.76 $15.88 $15.97 $13.65 $13.52 - ----------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ----------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.26) $(0.15) $(0.22) $(0.19) $(0.02) Net realized and unrealized gain (loss) on investments and foreign currency 0.13 2.03 0.13 2.51 0.15 - ----------------------------------------------------------------------------------------------------------------------------- Total from investment operations $(0.13) $1.88 $(0.09) $2.32 $0.13 - ----------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $17.63 $17.76 $15.88 $15.97 $13.65 - ----------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) (0.73) 11.84 (0.56)(b) 17.00(j) 0.96(n) - ----------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ----------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.27 2.27 2.25 2.33 2.35(a) Expenses after expense reductions (f) 2.17 2.17 2.20 N/A N/A Net investment loss (1.42) (0.88) (1.31) (1.37) (1.39)(a) Portfolio turnover 171 69 80 72 116 Net assets at end of period (000 Omitted) $164 $151 $143 $79 $5 - ----------------------------------------------------------------------------------------------------------------------------- CLASS 529C YEARS ENDED 8/31 --------------------------------------------------------------------------- 2006 2005 2004 2003 2002(i) Net asset value, beginning of period $17.78 $15.90 $15.99 $13.67 $13.54 - ----------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ----------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.26) $(0.16) $(0.22) $(0.19) $(0.02) Net realized and unrealized gain (loss) on investments and foreign currency 0.13 2.04 0.13 2.51 0.15 - ----------------------------------------------------------------------------------------------------------------------------- Total from investment operations $(0.13) $1.88 $(0.09) $2.32 $0.13 - ----------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $17.65 $17.78 $15.90 $15.99 $13.67 - ----------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) (0.73) 11.82 (0.56)(b) 16.97(j) 0.96(n) - ----------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ----------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.27 2.27 2.25 2.30 2.35(a) Expenses after expense reductions (f) 2.17 2.17 2.20 N/A N/A Net investment loss (1.43) (0.91) (1.29) (1.35) (1.38)(a) Portfolio turnover 171 69 80 72 116 Net assets at end of period (000 Omitted) $307 $290 $221 $58 $5 - ----------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued Any redemption fees charged by the fund during the 2004 and 2005 fiscal years resulted in a per share impact of less than $0.01. (a) Annualized. (b) The fund's net asset value and total return calculation include a non-recurring accrual recorded as a result of an administrative proceeding regarding disclosure of brokerage allocation practices in connection with fund sales. The non-recurring accrual did not have a material impact on the net asset value per share based on shares outstanding on the day the proceeds were recorded. (d) Per share data are based on average shares outstanding. (f) Ratios do not reflect reductions from fees paid indirectly. (i) For the period from the class' inception, December 31, 2002 (Class R), July 31, 2002 (Classes 529A, 529B, and 529C), October 31, 2003 (Class R3) and April 1, 2005 (Classes R1, R2, R4, and R5) through the stated period end. (j) The fund's net asset value and total return calculation include proceeds received on March 26, 2003 for the partial payment of a non-recurring litigation settlement from Cendant Corporation, recorded as a realized gain on investment transactions. The proceeds resulted in an increase in the net asset value of $0.01 per share based on shares outstanding on the day the proceeds were received. Excluding the effect of this payment from the ending net asset value per share, the Class A, Class B, Class C, Class I, Class R, Class 529A, Class 529B, and Class 529C total returns for the year ended August 31, 2003 would have been lower by approximately 0.08%, 0.09%, 0.08%, 0.09%, 0.08%, 0.09%, 0.09%, and 0.09%, respectively. (n) Not annualized. (r) Certain expenses have been reduced without which performance would have been lower. (s) From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower. (t) Total returns do not include any applicable sales charges. SEE NOTES TO FINANCIAL STATEMENTS NOTES TO FINANCIAL STATEMENTS (1) BUSINESS AND ORGANIZATION MFS Strategic Growth Fund (the fund) is a series of MFS Series Trust I (the trust). The trust is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open- end management investment company. (2) SIGNIFICANT ACCOUNTING POLICIES GENERAL - The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The fund can invest in foreign securities, including securities of emerging market issuers. Investments in foreign securities are vulnerable to the effects of changes in the relative values of the local currency and the U.S. dollar and to the effects of changes in each country's legal, political, and economic environment. The markets of emerging markets countries are generally more volatile than the markets of developed countries with more mature economies. All of the risks of investing in foreign securities previously described are heightened when investing in emerging markets countries. INVESTMENT VALUATIONS - Equity securities, including restricted equity securities, are generally valued at the last sale or official closing price as reported by an independent pricing service on the market or exchange on which they are primarily traded. For securities for which there were no sales reported that day, equity securities are generally valued at the last quoted daily bid quotation as reported by an independent pricing service on the market or exchange on which they are primarily traded. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which approximates market value. Open-end investment companies are generally valued at their net asset value per share. Securities and other assets generally valued on the basis of information from an independent pricing service may also be valued at a broker-dealer bid quotation. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates reported by an independent pricing service. The Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund's investments (including any fair valuation) to the adviser pursuant to valuation policies and procedures approved by the Board. If the adviser determines that reliable market quotations are not readily available, investments are valued at fair value as determined in good faith by the adviser in accordance with such procedures under the oversight of the Board of Trustees. Under the fund's valuation policies and procedures, market quotations are not considered to be readily available for many types of debt instruments. These investments are generally valued at fair value based on information from independent pricing services. The adviser may rely on independent pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund's net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of investments used to determine the fund's net asset value may differ from quoted or published prices for the same investments. In addition, investments may be valued at fair value if the adviser determines that an investment's value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund's net asset value, or after the halting of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. Events that occur on a frequent basis after foreign markets close (such as developments in foreign markets and significant movements in the U.S. markets) and prior to the determination of the fund's net asset value may be deemed to have a material affect on the value of securities traded in foreign markets. Accordingly, the fund's foreign equity securities may often be valued at fair value. REPURCHASE AGREEMENTS - The fund may enter into repurchase agreements with institutions that the fund's investment adviser has determined are creditworthy. Each repurchase agreement is recorded at cost. The fund requires that the securities collateral in a repurchase transaction be transferred to the custodian in a manner sufficient to enable the fund to obtain those securities in the event of a default under the repurchase agreement. The fund monitors, on a daily basis, the value of the collateral to ensure that its value, including accrued interest, is greater than amounts owed to the fund under each such repurchase agreement. The fund, along with other affiliated entities of Massachusetts Financial Services Company (MFS), may utilize a joint trading account for the purpose of entering into one or more repurchase agreements. FOREIGN CURRENCY TRANSLATION - Purchases and sales of foreign investments, income, and expenses are converted into U.S. dollars based upon currency exchange rates prevailing on the respective dates of such transactions. Gains and losses attributable to foreign currency exchange rates on sales of securities are recorded for financial statement purposes as net realized gains and losses on investments. Gains and losses attributable to foreign exchange rate movements on income and expenses are recorded for financial statement purposes as foreign currency transaction gains and losses. That portion of both realized and unrealized gains and losses on investments that results from fluctuations in foreign currency exchange rates is not separately disclosed. SECURITY LOANS - State Street Bank and Trust Company ("State Street"), as lending agent, may loan the securities of the fund to certain qualified institutions (the "Borrowers") approved by the fund. The loans are collateralized at all times by cash and/or U.S. Treasury securities in an amount at least equal to the market value of the securities loaned. State Street provides the fund with indemnification against Borrower default. The fund bears the risk of loss with respect to the investment of cash collateral. On loans collateralized by cash, the cash collateral is invested in a money market fund or short-term securities. A portion of the income generated upon investment of the collateral is remitted to the Borrowers, and the remainder is allocated between the fund and the lending agent. On loans collateralized by U.S. Treasury securities, a fee is received from the Borrower, and is allocated between the fund and the lending agent. Income from securities lending is included in interest income on the Statement of Operations. The dividend and interest income earned on the securities loaned is accounted for in the same manner as other dividend and interest income. SHORT TERM FEES - For purchases made on or after July 1, 2004 and before April 1, 2005, the fund charged a 2% redemption fee (which was retained by the fund) on proceeds from Class A, Class B, Class C, and Class I shares redeemed or exchanged within 5 business days following their acquisition (either by purchase or exchange). Effective April 1, 2005, the fund no longer charges a redemption fee. See the fund's prospectus for details. Any redemption fees charged are accounted for as an addition to paid-in-capital. INVESTMENT TRANSACTIONS AND INCOME - Investment transactions are recorded on the trade date. Interest income is recorded on the accrual basis. All premium and discount is amortized or accreted for financial statement purposes in accordance with U.S. generally accepted accounting principles. All discount is accreted for tax reporting purposes as required by federal income tax regulations. Dividends received in cash are recorded on the ex-dividend date. Certain dividends from foreign securities will be recorded when the fund is informed of the dividend if such information is obtained subsequent to the ex-dividend date. Dividend and interest payments received in additional securities are recorded on the ex-dividend or ex-interest date in an amount equal to the value of the security on such date. The fund may receive proceeds from litigation settlements involving its portfolio holdings. Any proceeds received are reflected in realized gain/loss in the Statement of Operations, or in unrealized gain/loss if the security is still held by the fund. FEES PAID INDIRECTLY - The fund's custody fee is reduced according to an arrangement that measures the value of cash deposited with the custodian by the fund. During the year ended August 31, 2006, the fund's custodian fees were reduced by $147,752 under this arrangement. The fund has entered into a commission recapture agreement, under which certain brokers will credit the fund a portion of the commissions generated, to offset certain expenses of the fund. For the year ended August 31, 2006, the fund's custodian expenses were reduced by $7,831 under this agreement. These amounts are shown as a reduction of total expenses on the Statement of Operations. Effective January 1, 2006, the commission recapture agreement was terminated. TAX MATTERS AND DISTRIBUTIONS - The fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable income, including realized capital gains. Accordingly, no provision for federal income tax is required in the financial statements. Foreign taxes, if any, have been accrued by the fund in the accompanying financial statements. Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future. Distributions in excess of net investment income or net realized gains are temporary overdistributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions for financial statement and tax purposes. Book/tax differences primarily relate to net operating losses, defaulted bonds, and wash sale loss deferrals. The fund declared no distributions for the years ended August 31, 2006 and August 31, 2005. The federal tax cost and the tax basis components of distributable earnings were as follows: AS OF 8/31/06 Cost of investments $1,609,285,364 ------------------------------------------------------------ Gross appreciation $80,111,216 Gross depreciation (83,720,571) ------------------------------------------------------------ Net unrealized appreciation (depreciation) $(3,609,355) Capital loss carryforwards (1,346,311,781) Other temporary differences (1,443,116) As of August 31, 2006, the fund had capital loss carryforwards available to offset future realized gains. Such losses expire as follows: 8/31/09 $(172,262,091) 8/31/10 (844,273,922) 8/31/11 (299,742,793) 8/31/12 (30,032,975) ------------------------------------------------------------ $(1,346,311,781) The availability of a portion of the capital loss carryforwards, which were acquired on June 10, 2005, in connection with the MFS Managed Sectors Fund merger, may be limited in a given year. In June 2006, FASB Interpretation No. 48, Accounting for Uncertainty in Income Taxes (the "Interpretation") was issued, and is effective for fiscal years beginning after December 15, 2006 and is to be applied to all open tax years as of the effective date. This Interpretation prescribes a minimum threshold for financial statement recognition of the benefit of a tax position taken or expected to be taken in a tax return, and requires certain expanded disclosures. Management has recently begun to evaluate the application of the Interpretation to the fund and has not at this time determined the impact, if any, resulting from the adoption of this Interpretation on the fund's financial statements. MULTIPLE CLASSES OF SHARES OF BENEFICIAL INTEREST - The fund offers multiple classes of shares, which differ in their respective distribution and service fees. All shareholders bear the common expenses of the fund based on daily net assets of each class, without distinction between share classes. Dividends are declared separately for each class. Differences in per share dividend rates are generally due to differences in separate class expenses. Class B and Class 529B shares will convert to Class A and Class 529A shares, respectively, approximately eight years after purchase. Class J shares closed on April 15, 2005. (3) TRANSACTIONS WITH AFFILIATES INVESTMENT ADVISER - The fund has an investment advisory agreement with Massachusetts Financial Services Company (MFS) to provide overall investment management and related administrative services and facilities to the fund. The management fee is computed daily and paid monthly at an annual rate of 0.75% of the fund's average daily net assets. As part of a settlement agreement with the New York Attorney General concerning market timing and related matters, MFS has agreed to reduce the management fee to 0.65% of the fund's average daily net assets for the period March 1, 2004 through February 28, 2009. For the year ended August 31, 2006 this waiver amounted to $1,605,129 and is reflected as a reduction of total expenses in the Statement of Operations. The management fee incurred for the year ended August 31, 2006 was equivalent to an annual effective rate of 0.65% of the fund's average daily net assets. DISTRIBUTOR - MFS Fund Distributors, Inc. (MFD), a wholly-owned subsidiary of MFS, as distributor, received $50,875 and $729 for the year ended August 31, 2006, as its portion of the initial sales charge on sales of Class A and Class 529A shares of the fund, respectively. The Board of Trustees has adopted a distribution plan for certain class shares pursuant to Rule 12b-1 of the Investment Company Act of 1940. The fund's distribution plan provides that the fund will pay MFD for services provided by MFD and financial intermediaries in connection with the distribution and servicing of certain share classes. One component of the plan is a distribution fee paid to MFD and another component of the plan is a service fee paid to MFD. MFD may subsequently pay all, or a portion, of the distribution and/or service fees to financial intermediaries. Distribution Fee Plan Table: TOTAL ANNUAL DISTRIBUTION DISTRIBUTION SERVICE DISTRIBUTION EFFECTIVE AND SERVICE FEE RATE FEE RATE PLAN(d) RATE(e) FEE Class A 0.10 0.25 0.35 0.35% $1,648,844 Class B 0.75 0.25 1.00 1.00% 3,230,877 Class C 0.75 0.25 1.00 1.00% 788,829 Class R 0.25 0.25 0.50 0.50% 17,198 Class R1 0.50 0.25 0.75 0.75% 2,004 Class R2 0.25 0.25 0.50 0.50% 2,308 Class R3 0.25 0.25 0.50 0.50% 5,032 Class R4 -- 0.25 0.25 0.25% 133 Class 529A 0.25 0.25 0.50 0.35% 1,971 Class 529B 0.75 0.25 1.00 1.00% 1,616 Class 529C 0.75 0.25 1.00 1.00% 3,036 - --------------------------------------------------------------------------------------------------------------------- Total Distribution and Service Fees $5,701,848 (d) In accordance with the distribution plan for certain classes, the fund pays distribution and/or service fees up to these annual percentage rates of each class' average daily net assets. (e) The annual effective rates represent actual fees incurred under the distribution plan for the year ended August 31, 2006 based on each class' average daily net assets. 0.10% of the Class 529A distribution fee is currently being paid by the fund. Payment of the remaining 0.15% of the Class 529A distribution fee is not yet in effect and will be implemented on such date as the fund's Board of Trustees may determine. Certain Class A, Class C and Class 529C shares are subject to a contingent deferred sales charge in the event of a shareholder redemption within 12 months of purchase. Class B and Class 529B shares are subject to a contingent deferred sales charge in the event of a shareholder redemption within six years of purchase. All contingent deferred sales charges are paid to MFD and during the year ended August 31, 2006, were as follows: AMOUNT Class A $16,802 Class B 495,088 Class C 3,760 Class 529B 125 Class 529C -- The fund has entered into and may from time to time enter into contracts with program managers and other parties which administer the tuition programs through which an investment in the fund's 529 share classes is made. The fund has entered into an agreement with MFD pursuant to which MFD receives an annual fee of up to 0.35% of the average daily net assets attributable to each 529 share class. The fee is based on average daily net assets and is currently established at 0.25% annually of average daily net assets of the fund's 529 share classes. The fee may only be increased with the approval of the Board of Trustees who oversees the fund. The services provided by MFD, or a third party with which MFD contracts, include recordkeeping and tax reporting and account services, as well as services designed to maintain the program's compliance with the Internal Revenue Code and other regulatory requirements. Program manager fees for the year ended August 31, 2006, were as follows: AMOUNT Class 529A $1,408 Class 529B 404 Class 529C 759 -------------------------------------------------- Total Program Manager Fees $2,571 SHAREHOLDER SERVICING AGENT - MFS Service Center, Inc. (MFSC), a wholly-owned subsidiary of MFS, receives a fee from the fund for its services as shareholder servicing agent calculated as a percentage of the average net assets of the fund as determined periodically under the supervision of the fund's Board of Trustees. For the year ended August 31, 2006, the fee was $1,566,367, which equated to 0.0976% annually of the fund's average daily net assets. MFSC also receives payment from the fund for out-of-pocket and sub-accounting expenses paid by MFSC on behalf of the fund. For the year ended August 31, 2006, these costs amounted to $478,133. The fund may also pay shareholder servicing related costs to non-related parties. ADMINISTRATOR - MFS provides certain financial, legal, shareholder communications, compliance, and other administrative services to the fund. Under an administrative services agreement, the fund partially reimburses MFS the costs incurred to provide these services. The fund is charged a fixed amount plus a fee based on calendar year average net assets. From July 1, 2005 through March 31, 2006, the fund's annual fixed amount was $10,000. Effective April 1, 2006, the fund's annual fixed amount is $17,500. The administrative services fee incurred for the year ended August 31, 2006 was equivalent to an annual effective rate of 0.0134% of the fund's average daily net assets. In addition to the administrative services provided by MFS to the fund as described above, MFS is responsible for providing certain retirement plan administration and services with respect to certain shares. These services include various administrative, recordkeeping, and communication/educational services with respect to the retirement plans which invest in these shares, and may be provided directly by MFS or by a third party. MFS may subsequently pay all, or a portion, of the retirement plan administration and services fee to affiliated or unaffiliated third parties. For the year ended August 31, 2006, the fund paid MFS an annual retirement plan administration and services fee up to the following annual percentage rates of each class' average daily net assets: ANNUAL EFFECTIVE TOTAL FEE RATE RATE(g) AMOUNT Class R1 0.45% 0.36% $1,203 Class R2 0.40% 0.25% 1,846 Class R3 0.25% 0.16% 2,516 Class R4 0.15% 0.15% 80 Class R5 0.10% 0.10% 53 - -------------------------------------------------------------------------------- Total Retirement Plan Administration and Services Fees $5,698 (g) Effective October 1, 2005, MFS has agreed in writing to waive a portion of the retirement plan administration and services fee equal to 0.10% for Class R1 shares, 0.15% for Class R2 shares, and 0.10% for Class R3 shares. This agreement will continue until at least September 30, 2008. For the year ended August 31, 2006, this waiver amounted to $1,864 and is reflected as a reduction of total expenses in the Statement of Operations. TRUSTEES' AND OFFICERS' COMPENSATION - The fund pays compensation to Independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. The fund does not pay compensation directly to Trustees or officers of the fund who are also officers of the investment adviser, all of whom receive remuneration for their services to the fund from MFS. Certain officers and Trustees of the fund are officers or directors of MFS, MFD, and MFSC. The fund has an unfunded, defined benefit plan for certain retired Independent Trustees which resulted in a pension expense of $2,405. The fund also has an unfunded retirement benefit deferral plan for certain Independent Trustees which resulted in a net decrease in expense of $2,309. Both amounts are included in Independent trustees' compensation for the year ended August 31, 2006. The deferred liability for retirement benefits payable to certain Trustees under both plans amounted to $56,381 at August 31, 2006, and is included in payable for independent trustees' compensation. DEFERRED TRUSTEE COMPENSATION - Under a Deferred Compensation Plan (the Plan) Independent Trustees previously were allowed to elect to defer receipt of all or a portion of their annual compensation. Trustees are no longer allowed to defer compensation under the Plan. Amounts previously deferred are treated as though equivalent dollar amounts had been invested in shares of the fund or other MFS funds selected by the Trustee. Deferred amounts represent an unsecured obligation of the fund until distributed in accordance with the Plan. Included in other assets and payable for independent trustees' compensation is $3,947 of Deferred Trustees' Compensation. OTHER - This fund and certain other MFS funds (the funds) have entered into a services agreement (the Agreement) which provides for payment of fees by the funds to Tarantino LLC in return for the provision of services of an Independent Chief Compliance Officer (ICCO) for the funds. The ICCO is an officer of the funds and the sole member of Tarantino LLC. The funds can terminate the Agreement with Tarantino LLC at any time under the terms of the Agreement. For the year ended August 31, 2006, the fee paid to Tarantino LLC was $11,140. MFS has agreed to reimburse the fund for a portion of the payments made by the funds to Tarantino LLC in the amount of $9,009, which is shown as a reduction of total expenses in the Statement of Operations. Additionally, MFS has agreed to bear all expenses associated with office space, other administrative support, and supplies provided to the ICCO. (4) PORTFOLIO SECURITIES Purchases and sales of investments, other than U.S. government securities, purchased option transactions, and short-term obligations, aggregated $2,685,752,331 and $2,810,963,910, respectively. (5) SHARES OF BENEFICIAL INTEREST The fund's Declaration of Trust permits the Trustees to issue an unlimited number of full and fractional shares of beneficial interest. Transactions in fund shares were as follows: YEAR ENDED YEAR ENDED 8/31/06 8/31/05(i) SHARES AMOUNT SHARES AMOUNT Shares sold Class A 4,377,994 $83,738,691 4,757,164 $85,935,893 Class B 831,375 15,209,822 1,575,957 27,392,859 Class C 260,061 4,776,584 333,948 5,798,886 Class I 8,989,008 177,217,230 9,423,324 174,295,462 Class J (c) -- -- 22,747 391,281 Class R 25,065 477,701 181,581 3,303,225 Class R1 11,694 218,511 11,518 205,511 Class R2 39,226 724,819 8,385 149,704 Class R3 29,585 549,177 44,189 809,232 Class R4 -- -- 2,781 50,000 Class R5 -- -- 2,780 50,000 Class 529A 7,044 131,184 4,173 75,144 Class 529B 1,519 27,095 1,599 27,649 Class 529C 3,416 63,535 5,138 89,910 - ------------------------------------------------------------------------------------------------------------ 14,575,987 $283,134,349 16,375,284 $298,574,756 Shares issued in connection with acquisition of MFS Managed Sectors Fund Class A -- $-- 7,801,545 $143,704,457 Class B -- -- 1,752,230 30,821,723 Class C -- -- 51,143 901,145 Class I -- -- 112,114 2,114,473 - ------------------------------------------------------------------------------------------------------------ -- $-- 9,717,032 $177,541,798 Shares reacquired Class A (9,985,755) $(191,838,092) (18,826,189) $(339,752,339) Class B (8,233,984) (149,909,261) (8,809,726) (152,957,259) Class C (1,504,250) (27,523,677) (2,536,107) (43,995,123) Class I (463,984) (9,172,412) (435,238) (8,147,845) Class J (c) -- -- (360,973) (6,137,743) Class R (89,429) (1,705,603) (98,637) (1,804,140) Class R1 (2,748) (49,551) (112) (2,057) Class R2 (4,590) (80,306) (942) (17,054) Class R3 (16,005) (305,472) (18,704) (347,920) Class 529A (4,306) (80,216) (2,182) (38,496) Class 529B (693) (12,635) (2,154) (37,584) Class 529C (2,322) (43,033) (2,714) (48,488) - ------------------------------------------------------------------------------------------------------------ (20,308,066) $(380,720,258) (31,093,678) $(553,286,048) Net change Class A (5,607,761) $(108,099,401) (6,267,480) $(110,111,989) Class B (7,402,609) (134,699,439) (5,481,539) (94,742,677) Class C (1,244,189) (22,747,093) (2,151,016) (37,295,092) Class I 8,525,024 168,044,818 9,100,200 168,262,090 Class J (c) -- -- (338,226) (5,746,462) Class R (64,364) (1,227,902) 82,944 1,499,085 Class R1 8,946 168,960 11,406 203,454 Class R2 34,636 644,513 7,443 132,650 Class R3 13,580 243,705 25,485 461,312 Class R4 -- -- 2,781 50,000 Class R5 -- -- 2,780 50,000 Class 529A 2,738 50,968 1,991 36,648 Class 529B 826 14,460 (555) (9,935) Class 529C 1,094 20,502 2,424 41,422 - ------------------------------------------------------------------------------------------------------------ (5,732,079) $(97,585,909) (5,001,362) $(77,169,494) (c) Class J shares closed on April 15, 2005. (i) For the period from the class' inception, April 1, 2005 (Classes R1, R2, R4, and R5) through the stated period end. The fund is one of several mutual funds in which the MFS funds-of-funds may invest. The MFS funds-of-funds do not invest in the underlying MFS funds for the purpose of exercising management or control. At the end of the period, the MFS Aggressive Growth Allocation Fund, MFS Conservative Allocation Fund, MFS Growth Allocation Fund and MFS Moderate Allocation Fund were the owners of record of approximately 14%, 2%, 22% and 13%, respectively, of the value of outstanding voting shares. In addition, the MFS Lifetime 2010 Fund, MFS Lifetime 2020 Fund, MFS Lifetime 2030 Fund and MFS Lifetime 2040 Fund were each the owners of record of less than 1% of the value of outstanding voting shares. (6) LINE OF CREDIT The fund and other affiliated funds participate in a $1 billion unsecured committed line of credit provided by a syndication of banks under a credit agreement. In addition, the fund and other affiliated funds have established uncommitted borrowing arrangements with certain banks. Borrowings may be made for temporary financing needs. Interest is charged to each fund, based on its borrowings, generally at a rate equal to the Federal Reserve funds rate plus 0.35%. In addition, a commitment fee, based on the average daily, unused portion of the committed line of credit, is allocated among the participating funds at the end of each calendar quarter. For the year ended August 31, 2006, the fund's commitment fee and interest expense were $10,726 and $236, respectively, and are included in miscellaneous expense on the Statement of Operations. (7) ACQUISITIONS At close of business on June 10, 2005, the fund acquired all of the assets and liabilities of MFS Managed Sectors Fund. The acquisition was accomplished by a tax-free exchange of 9,717,032 shares of the fund (valued at $177,541,798) for all of the assets and liabilities of MFS Managed Sectors Fund. MFS Managed Sectors Fund then converted all of its outstanding shares for the shares of the fund and distributed those shares to its shareholders. MFS Managed Sectors fund's net assets on that date were $177,541,798, including $23,232,000 of unrealized appreciation, $538,133 of accumulated net investment loss, and $282,661,889 of accumulated net realized loss on investments and foreign currency transactions. These assets were combined with those of the fund. The aggregate net assets of the fund after the acquisition were $1,626,560,058. REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM To the Trustees of MFS Series Trust I and Shareholders of MFS Strategic Growth Fund: We have audited the accompanying statement of assets and liabilities of MFS Strategic Growth Fund (the Fund) (one of the portfolios comprising MFS Series Trust I), including the portfolio of investments, as of August 31, 2006, and the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended, and the financial highlights for each of the periods indicated therein. These financial statements and financial highlights are the responsibility of the Fund's management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. We were not engaged to perform an audit of the Fund's internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Fund's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements and financial highlights, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of August 31, 2006, by correspondence with the Fund's custodian and brokers or by other appropriate auditing procedures where replies from brokers were not received. We believe that our audits provide a reasonable basis for our opinion. In our opinion, the financial statements and financial highlights referred to above present fairly, in all material respects, the financial position of MFS Strategic Growth Fund at August 31, 2006, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended, and its financial highlights for each of the periods indicated therein, in conformity with U.S. generally accepted accounting principles. ERNST & YOUNG LLP Boston, Massachusetts October 20, 2006 TRUSTEES AND OFFICERS -- IDENTIFICATION AND BACKGROUND The Trustees and officers of the Trust, as of October 1, 2006, are listed below, together with their principal occupations during the past five years. (Their titles may have varied during that period.) The address of each Trustee and officer is 500 Boylston Street, Boston, Massachusetts 02116. PRINCIPAL OCCUPATIONS DURING POSITION(s) HELD TRUSTEE/OFFICER THE PAST FIVE YEARS & NAME, DATE OF BIRTH WITH FUND SINCE(h) OTHER DIRECTORSHIPS(j) - ------------------- ---------------- --------------- ----------------------------- INTERESTED TRUSTEES Robert J. Manning(k) Trustee February 2004 Massachusetts Financial Services (born 10/20/63) Company, Chief Executive Officer, President, Chief Investment Officer and Director Robert C. Pozen(k) Trustee February 2004 Massachusetts Financial Services (born 8/08/46) Company, Chairman (since February 2004); Secretary of Economic Affairs, The Commonwealth of Massachusetts (January 2002 to December 2002); Fidelity Investments, Vice Chairman (June 2000 to December 2001); Fidelity Management & Research Company (investment adviser), President (March 1997 to July 2001); Bell Canada Enterprises (telecommunications), Director; Medtronic, Inc. (medical technology), Director; Telesat (satellite communications), Director INDEPENDENT TRUSTEES J. Atwood Ives Trustee and Chair February 1992 Private investor; Eastern (born 5/01/36) of Trustees Enterprises (diversified services company), Chairman, Trustee and Chief Executive Officer (until November 2000) Robert E. Butler(n) Trustee January 2006 Consultant - regulatory and (born 11/29/41) compliance matters (since July 2002); PricewaterhouseCoopers LLP (professional services firm), Partner (November 2000 until June 2002) Lawrence H. Cohn, M.D. Trustee August 1993 Brigham and Women's Hospital, (born 3/11/37) Senior Cardiac Surgeon, Chief of Cardiac Surgery (until 2005); Harvard Medical School, Professor of Surgery; Brigham and Women's Hospital Physicians' Organization, Chair (2000 to 2004) David H. Gunning Trustee January 2004 Cleveland-Cliffs Inc. (mining (born 5/30/42) products and service provider), Vice Chairman/Director (since April 2001); Encinitos Ventures (private investment company), Principal (1997 to April 2001); Lincoln Electric Holdings, Inc. (welding equipment manufacturer), Director William R. Gutow Trustee December 1993 Private investor and real estate (born 9/27/41) consultant; Capitol Entertainment Management Company (video franchise), Vice Chairman Michael Hegarty Trustee December 2004 Retired; AXA Financial (financial (born 12/21/44) services and insurance), Vice Chairman and Chief Operating Officer (until May 2001); The Equitable Life Assurance Society (insurance), President and Chief Operating Officer (until May 2001) Lawrence T. Perera Trustee July 1981 Hemenway & Barnes (attorneys), (born 6/23/35) Partner J. Dale Sherratt Trustee August 1993 Insight Resources, Inc. (born 9/23/38) (acquisition planning specialists), President; Wellfleet Investments (investor in health care companies), Managing General Partner (since 1993); Cambridge Nutraceuticals (professional nutritional products), Chief Executive Officer (until May 2001) Laurie J. Thomsen Trustee March 2005 Private investor; Prism Venture (born 8/05/57) Partners (venture capital), Co- founder and General Partner (until June 2004); St. Paul Travelers Companies (commercial property liability insurance), Director Robert W. Uek Trustee January 2006 Retired (since 1999); (born 5/18/41) PricewaterhouseCoopers LLP (professional services firm), Partner (until 1999); Consultant to investment company industry (since 2000); TT International Funds (mutual fund complex), Trustee (2000 until 2005); Hillview Investment Trust II Funds (mutual fund complex), Trustee (2000 until 2005) OFFICERS Maria F. Dwyer(k) President November 2005 Massachusetts Financial Services (born 12/01/58) Company, Executive Vice President and Chief Regulatory Officer (since March 2004); Fidelity Management & Research Company, Vice President (prior to March 2004); Fidelity Group of Funds, President and Treasurer (prior to March 2004) Tracy Atkinson(k) Treasurer September 2005 Massachusetts Financial Services (born 12/30/64) Company, Senior Vice President (since September 2004); PricewaterhouseCoopers LLP, Partner (prior to September 2004) Christopher R. Bohane(k) Assistant Secretary July 2005 Massachusetts Financial Services (born 1/18/74) and Assistant Clerk Company, Vice President and Senior Counsel (since April 2003); Kirkpatrick & Lockhart LLP (law firm), Associate (prior to April 2003) Ethan D. Corey(k) Assistant Secretary July 2005 Massachusetts Financial Services (born 11/21/63) and Assistant Clerk Company, Special Counsel (since December 2004); Dechert LLP (law firm), Counsel (prior to December 2004) David L. DiLorenzo(k) Assistant Treasurer July 2005 Massachusetts Financial Services (born 8/10/68) Company, Vice President (since June 2005); JP Morgan Investor Services, Vice President (prior to June 2005) Timothy M. Fagan(k) Assistant Secretary September 2005 Massachusetts Financial Services (born 7/10/68) and Assistant Clerk Company, Vice President and Senior Counsel (since September 2005); John Hancock Advisers, LLC, Vice President and Chief Compliance Officer (September 2004 to August 2005), Senior Attorney (prior to September 2004); John Hancock Group of Funds, Vice President and Chief Compliance Officer (September 2004 to December 2004) Mark D. Fischer(k) Assistant Treasurer July 2005 Massachusetts Financial Services (born 10/27/70) Company, Vice President (since May 2005); JP Morgan Investment Management Company, Vice President (prior to May 2005) Brian E. Langenfeld(k) Assistant Secretary June 2006 Massachusetts Financial Services (born 3/07/73) and Assistant Clerk Company, Assistant Vice President and Counsel (since May 2006); John Hancock Advisers, LLC, Assistant Vice President and Counsel (May 2005 to April 2006); John Hancock Advisers, LLC, Attorney and Assistant Secretary (prior to May 2005) Ellen Moynihan(k) Assistant Treasurer April 1997 Massachusetts Financial Services (born 11/13/57) Company, Senior Vice President Susan S. Newton(k) Assistant Secretary May 2005 Massachusetts Financial Services (born 3/07/50) and Assistant Clerk Company, Senior Vice President and Associate General Counsel (since April 2005); John Hancock Advisers, LLC, Senior Vice President, Secretary and Chief Legal Officer (prior to April 2005); John Hancock Group of Funds, Senior Vice President, Secretary and Chief Legal Officer (prior to April 2005) Susan A. Pereira(k) Assistant Secretary July 2005 Massachusetts Financial Services (born 11/05/70) and Assistant Clerk Company, Vice President and Senior Counsel (since June 2004); Bingham McCutchen LLP (law firm), Associate (prior to June 2004) Mark N. Polebaum(k) Secretary and Clerk January 2006 Massachusetts Financial Services (born 5/01/52) Company, Executive Vice President, General Counsel and Secretary (since January 2006); Wilmer Cutler Pickering Hale and Dorr LLP (law firm), Partner (prior to January 2006) Frank L. Tarantino Independent Chief June 2004 Tarantino LLC (provider of (born 3/07/44) Compliance Officer compliance services), Principal (since June 2004); CRA Business Strategies Group (consulting services), Executive Vice President (April 2003 to June 2004); David L. Babson & Co. (investment adviser), Managing Director, Chief Administrative Officer and Director (prior to March 2003) James O. Yost(k) Assistant Treasurer September 1990 Massachusetts Financial Services (born 6/12/60) Company, Senior Vice President - ------------ (h) Date first appointed to serve as Trustee/officer of an MFS fund. Each Trustee has served continuously since appointment unless indicated otherwise. (j) Directorships or trusteeships of companies required to report to the Securities and Exchange Commission (i.e., "public companies"). (k) "Interested person" of the Trust within the meaning of the Investment Company Act of 1940 (referred to as the 1940 Act), which is the principal federal law governing investment companies like the fund, as a result of position with MFS. The address of MFS is 500 Boylston Street, Boston, Massachusetts 02116. (n) In 2004 and 2005, Mr. Butler provided consulting services to the independent compliance consultant retained by MFS pursuant to its settlement with the SEC concerning market timing and related matters. The terms of that settlement required that compensation and expenses related to the independent compliance consultant be borne exclusively by MFS and, therefore, MFS paid Mr. Butler for the services he rendered to the independent compliance consultant. In 2004 and 2005, MFS paid Mr. Butler a total of $351,119.29. The Trust held a shareholders' meeting in 2005 to elect Trustees, and will hold a shareholders' meeting at least once every five years thereafter, to elect Trustees. Each Trustee (except Mr. Butler and Mr. Uek) has been elected by shareholders and each Trustee and officer holds office until his or her successor is chosen and qualified or until his or her earlier death, resignation, retirement or removal. Messrs. Butler, Sherratt and Uek and Ms. Thomsen are members of the Trust's Audit Committee. Each of the Trust's Trustees and officers holds comparable positions with certain other funds of which MFS or a subsidiary is the investment adviser or distributor, and, in the case of the officers, with certain affiliates of MFS. As of January 1, 2006, the Trustees served as board members of 98 funds within the MFS Family of Funds. The Statement of Additional Information contains further information about the Trustees and is available without charge upon request by calling 1-800-225-2606. - ------------------------------------------------------------------------------------------------------- INVESTMENT ADVISER CUSTODIAN Massachusetts Financial Services Company State Street Bank and Trust Company 500 Boylston Street, Boston, MA 02116-3741 225 Franklin Street, Boston, MA 02110 DISTRIBUTOR INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM MFS Fund Distributors, Inc. Ernst & Young LLP 500 Boylston Street, Boston, MA 02116-3741 200 Clarendon Street, Boston, MA 02116 PORTFOLIO MANAGER Eric B. Fischman BOARD REVIEW OF INVESTMENT ADVISORY AGREEMENT The Investment Company Act of 1940 requires that both the full Board of Trustees and a majority of the non-interested ("independent") Trustees, voting separately, annually approve the continuation of the Fund's investment advisory agreement with MFS. The Trustees consider matters bearing on the Fund and its advisory arrangements at their meetings throughout the year, including a review of performance data at each regular meeting. In addition, the independent Trustees met several times over the course of three months beginning in May and ending in July, 2006 ("contract review meetings") for the specific purpose of considering whether to approve the continuation of the investment advisory agreement for the Fund and the other investment companies that the Board oversees (the "MFS Funds"). The independent Trustees were assisted in their evaluation of the Fund's investment advisory agreement by independent legal counsel, from whom they received separate legal advice and with whom they met separately from MFS during various contract review meetings. The independent Trustees were also assisted in this process by the MFS Funds' Independent Chief Compliance Officer, a full-time senior officer appointed by and reporting to the independent Trustees. In connection with their deliberations regarding the continuation of the investment advisory agreement, the Trustees, including the independent Trustees, considered such information and factors as they believed, in light of the legal advice furnished to them and their own business judgment, to be relevant. The investment advisory agreement for the Fund was considered separately, although the Trustees also took into account the common interests of all MFS Funds in their review. As described below, the Trustees considered the nature, quality, and extent of the various investment advisory, administrative, and shareholder services performed by MFS under the existing investment advisory agreement and other arrangements with the Fund. In connection with their contract review meetings, the Trustees received and relied upon materials which included, among other items: (i) information provided by Lipper Inc. on the investment performance of the Fund for various time periods ended December 31, 2005 and the investment performance of a group of funds with substantially similar investment classifications/objectives (the "Lipper performance universe"), as well as the investment performance of a group of funds identified by objective criteria suggested by MFS ("MFS peer funds"), (ii) information provided by Lipper Inc. on the Fund's advisory fees and other expenses and the advisory fees and other expenses of comparable funds identified by Lipper (the "Lipper expense group"), as well as the advisory fees and other expenses of MFS peer funds, (iii) information provided by MFS on the advisory fees of comparable portfolios of other clients of MFS, including institutional separate accounts and other clients, (iv) information as to whether and to what extent applicable expense waivers, reimbursements or fee "breakpoints" are observed for the Fund, (v) information regarding MFS' financial results and financial condition, including MFS' and certain of its affiliates' estimated profitability from services performed for the Fund and the MFS Funds as a whole, (vi) MFS' views regarding the outlook for the mutual fund industry and the strategic business plans of MFS, (vii) descriptions of various functions performed by MFS for the Funds, such as compliance monitoring and portfolio trading practices, and (viii) information regarding the overall organization of MFS, including information about MFS' senior management and other personnel providing investment advisory, administrative and other services to the Fund and the other MFS Funds. The comparative performance, fee and expense information prepared and provided by Lipper Inc. was not independently verified and the independent Trustees did not independently verify any information provided to them by MFS. The Trustees' conclusion as to the continuation of the investment advisory agreement was based on a comprehensive consideration of all information provided to the Trustees and not the result of any single factor. Some of the factors that figured particularly in the Trustees' deliberations are described below, although individual Trustees may have evaluated the information presented differently from one another, giving different weights to various factors. It is also important to recognize that the fee arrangements for the Fund and other MFS Funds are the result of years of review and discussion between the independent Trustees and MFS, that certain aspects of such arrangements may receive greater scrutiny in some years than others, and that the Trustees' conclusions may be based, in part, on their consideration of these same arrangements during the course of the year and in prior years. Based on information provided by Lipper Inc. and MFS, the Trustees reviewed the Fund's total return investment performance as well as the performance of peer groups of funds over various time periods. The Trustees placed particular emphasis on the total return performance of the Fund's Class A shares in comparison to the performance of funds in its Lipper performance universe over the three-year period ended December 31, 2005, which the Trustees believed was a long enough period to reflect differing market conditions. The Fund's performance was in the 4th quintile relative to the other funds in the universe for this three-year period (the 1st quintile being the best performers and the 5th quintile being the worst performers). The total return performance of the Fund's Class A shares was in the 5th quintile for each of the one and five-year periods ended December 31, 2005 relative to the Lipper performance universe. Because of the passage of time, these performance results may differ from the performance results for more recent periods, including those shown elsewhere in this report. The Trustees expressed concern about the ongoing substandard investment performance of the Fund. In the course of their deliberations, the Trustees took into account information provided by MFS in connection with the contract review meetings, as well as during investment review meetings conducted with portfolio management personnel during the course of the year, as to MFS' efforts to improve the Fund's performance, including the recent restructuring of responsibilities among MFS' senior investment management executives and changes to the Fund's portfolio management team in 2004 and 2005, including the replacement of the primary portfolio manager in 2005. In addition, the Trustees requested that they receive a separate update on the Fund's performance at each of their meetings. After reviewing these and related factors, the Trustees concluded, within the context of their overall conclusions regarding the investment advisory agreement, that they were satisfied with MFS' responses and efforts and plans to improve investment performance were sufficient to support approval of the continuance of the investment advisory agreement for an additional one year period, but that they would continue to closely monitor the performance of the Fund. In assessing the reasonableness of the Fund's advisory fee, the Trustees considered, among other information, the Fund's advisory fee and the total expense ratio of the Fund's Class A shares as a percentage of average net assets and the advisory fee and total expense ratios of peer groups of funds based on information provided by Lipper Inc. and MFS. The Trustees considered that there is an advisory fee reduction in effect for the Fund through February 28, 2009 as part of MFS' settlement with the New York Attorney General concerning market timing and related matters. The Trustees also considered that, according to the Lipper data, the Fund's effective advisory fee rate (taking into account the advisory fee reduction) was lower than the Lipper expense group median, and the total expense ratio was at the Lipper expense group median. The Trustees also considered the advisory fees charged by MFS to institutional accounts. In comparing these fees, the Trustees considered information provided by MFS as to the generally broader scope of services provided by MFS to the Fund in comparison to institutional accounts, the higher demands placed on MFS' investment personnel and trading infrastructure as a result of the daily cash in-flows and out-flows of the Fund, and the impact on MFS and expenses associated with the more extensive regulatory regime to which the Fund is subject in comparison to institutional accounts. The Trustees also considered whether the Fund is likely to benefit from any economies of scale in the management of the Fund in the event of growth in assets of the Fund. They noted that the Fund's advisory fee rate schedule is not currently subject to any breakpoints. Taking into account the advisory fee reduction noted above, the Trustees determined not to recommend any advisory fee breakpoints for the Fund at this time. The Trustees also considered information prepared by MFS relating to MFS' costs and profits with respect to the Fund, the MFS Funds considered as a group, and other investment companies and accounts advised by MFS, as well as MFS' methodologies used to determine and allocate its costs to the MFS Funds, the Fund and other accounts and products for purposes of estimating profitability. After reviewing these and other factors described herein, the Trustees concluded, within the context of their overall conclusions regarding the investment advisory agreement, that the advisory fees charged to the Fund represent reasonable compensation in light of the services being provided by MFS to the Fund. In addition, the Trustees considered MFS' resources and related efforts to continue to retain, attract and motivate capable personnel to serve the Fund. The Trustees also considered current and developing conditions in the financial services industry, including the entry into the industry of large and well-capitalized companies which are spending, and appear to be prepared to continue to spend, substantial sums to engage personnel and to provide services to competing investment companies. In this regard, the Trustees also considered the financial resources of MFS and its ultimate parent, Sun Life Financial Inc. The Trustees also considered the advantages and possible disadvantages to the Fund of having an adviser which also serves other investment companies as well as other accounts. The Trustees also considered the nature, quality, cost, and extent of administrative, transfer agency, and distribution services provided to the Fund by MFS and its affiliates under agreements and plans other than the investment advisory agreement, including any 12b-1 fees the Fund pays to MFS Fund Distributors, Inc., an affiliate of MFS. The Trustees also considered the nature, extent and quality of certain other services MFS performs or arranges for on the Fund's behalf, which may include securities lending programs, directed expense payment programs, class action recovery programs, and MFS' interaction with third-party service providers, principally custodians and sub-custodians. The Trustees concluded that the various non-advisory services provided by MFS and its affiliates on behalf of the Funds were satisfactory. The Trustees also considered benefits to MFS from the use of the Fund's portfolio brokerage commissions, if applicable, to pay for investment research (excluding third-party research, for which MFS pays directly), and various other factors. Additionally, the Trustees considered so-called "fall-out benefits" to MFS such as reputational value derived from serving as investment manager to the Fund. Based on their evaluation of factors that they deemed to be material, including those factors described above, the Board of Trustees, including a majority of the independent Trustees, concluded that the Fund's investment advisory agreement with MFS should be continued for an additional one-year period, commencing August 1, 2006. A discussion regarding the Board's most recent review and renewal of the Fund's investment advisory agreement will be available on or before November 1, 2006 by clicking on the fund's name under "Select a fund" on the MFS Web site (mfs.com). PROXY VOTING POLICIES AND INFORMATION A general description of the MFS funds' proxy voting policies and procedures is available without charge, upon request, by calling 1-800-225-2606, by visiting the Proxy Voting section of mfs.com or by visiting the SEC's Web site at http://www.sec.gov. Information regarding how the fund voted proxies relating to portfolio securities during the most recent twelve-month period ended June 30 is available without charge by visiting the Proxy Voting section of mfs.com or by visiting the SEC's Web site at http://www.sec.gov. QUARTERLY PORTFOLIO DISCLOSURE The fund will file a complete schedule of portfolio holdings with the Securities and Exchange Commission (the Commission) for the first and third quarters of each fiscal year on Form N-Q. The fund's Form N-Q may be reviewed and copied at the: Public Reference Room Securities and Exchange Commission 100 F Street, NE, Room 1580 Washington, D.C. 20549 Information on the operation of the Public Reference Room may be obtained by calling the Commission at 1-202-551-5850. The fund's Form N-Q is available on the EDGAR database on the Commission's Internet Web site at http://www.sec.gov, and copies of this information may be obtained, upon payment of a duplicating fee, by electronic request at the following e-mail address: publicinfo@sec.gov or by writing the Public Reference Section at the above address. A shareholder can also obtain the quarterly portfolio holdings report at mfs.com. FEDERAL TAX INFORMATION (unaudited) The fund will notify shareholders of amounts for use in preparing 2006 income tax forms in January 2007. MFS(R) PRIVACY NOTICE Privacy is a concern for every investor today. At MFS Investment Management(R) and the MFS funds, we take this concern very seriously. We want you to understand our policies about the investment products and services that we offer, and how we protect the nonpublic personal information of investors who have a direct relationship with us and our wholly owned subsidiaries. Throughout our business relationship, you provide us with personal information. We maintain information and records about you, your investments, and the services you use. Examples of the nonpublic personal information we maintain include o data from investment applications and other forms o share balances and transactional history with us, our affiliates, or others o facts from a consumer reporting agency We do not disclose any nonpublic personal information about our customers or former customers to anyone, except as permitted by law. We may share nonpublic personal information with third parties or certain of our affiliates in connection with servicing your account or processing your transactions. We may share information with companies or financial institutions that perform marketing services on our behalf or with other financial institutions with which we have joint marketing arrangements, subject to any legal requirements. Authorization to access your nonpublic personal information is limited to appropriate personnel who provide products, services, or information to you. We maintain physical, electronic, and procedural safeguards to help protect the personal information we collect about you. If you have any questions about the MFS privacy policy, please call 1-800-225-2606 any business day between 8 a.m. and 8 p.m. Eastern time. Note: If you own MFS products or receive MFS services in the name of a third party such as a bank or broker-dealer, their privacy policy may apply to you instead of ours. CONTACT US WEB SITE MAILING ADDRESS mfs.com MFS Service Center, Inc. P.O. Box 55824 MFS TALK Boston, MA 1-800-637-8255 02205-5824 24 hours a day OVERNIGHT MAIL ACCOUNT SERVICE AND MFS Service Center, Inc. LITERATURE 500 Boylston Street Boston, MA 02116-3741 SHAREHOLDERS 1-800-225-2606 8 a.m. to 8 p.m. ET INVESTMENT PROFESSIONALS 1-800-343-2829 8 a.m. to 8 p.m. ET RETIREMENT PLAN SERVICES 1-800-637-1255 8 a.m. to 8 p.m. ET - ------------------------------------------------------------------------------- Go paperless with eDELIVERY: Arrange to have MFS send prospectuses, reports, and proxies directly to your e-mail inbox. You'll get timely information and less clutter in your mailbox (not to mention help your fund save printing and postage costs). SIGN UP: If your account is registered with us, simply go to mfs.com, log in to your account via MFS Access, and select the eDelivery sign up options. If you own your MFS fund shares through a financial institution or a retirement plan, MFS TALK, MFS Access, and eDelivery may not be available to you. - ------------------------------------------------------------------------------- M F S(R) INVESTMENT MANAGEMENT M F S(R) INVESTMENT MANAGEMENT [graphic omitted] ANNUAL REPORT KEEPING YOU INFORMED MFS wants to ensure that you are consistently updated about your investments with us. This shareholder report will not only show how your investment performed during the time period, but will also provide you with informative commentary from the portfolio management team. They will offer an overview of market conditions and will also discuss the specific factors that may have enhanced or detracted from your investment's performance. MFS(R) VALUE FUND LETTER FROM THE CEO 1 - ---------------------------------------------------------------- PORTFOLIO COMPOSITION 2 - ---------------------------------------------------------------- MANAGEMENT REVIEW 3 - ---------------------------------------------------------------- PERFORMANCE SUMMARY 5 - ---------------------------------------------------------------- EXPENSE TABLE 8 - ---------------------------------------------------------------- PORTFOLIO OF INVESTMENTS 10 - ---------------------------------------------------------------- STATEMENT OF ASSETS AND LIABILITIES 15 - ---------------------------------------------------------------- STATEMENT OF OPERATIONS 18 - ---------------------------------------------------------------- STATEMENTS OF CHANGES IN NET ASSETS 20 - ---------------------------------------------------------------- FINANCIAL HIGHLIGHTS 22 - ---------------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 36 - ---------------------------------------------------------------- REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM 48 - ---------------------------------------------------------------- TRUSTEES AND OFFICERS 49 - ---------------------------------------------------------------- BOARD REVIEW OF INVESTMENT ADVISORY AGREEMENT 55 - ---------------------------------------------------------------- PROXY VOTING POLICIES AND INFORMATION 59 - ---------------------------------------------------------------- QUARTERLY PORTFOLIO DISCLOSURE 59 - ---------------------------------------------------------------- FEDERAL TAX INFORMATION 59 - ---------------------------------------------------------------- MFS(R) PRIVACY NOTICE 60 - ---------------------------------------------------------------- CONTACT INFORMATION BACK COVER - ---------------------------------------------------------------- Fund objective: Seeks capital appreciation and reasonable income. THE REPORT IS PREPARED FOR THE GENERAL INFORMATION OF SHAREHOLDERS. IT IS AUTHORIZED FOR DISTRIBUTION TO PROSPECTIVE INVESTORS ONLY WHEN PRECEDED OR ACCOMPANIED BY A CURRENT PROSPECTUS. - ------------------------------------------------------------------------------- NOT FDIC INSURED o MAY LOSE VALUE o NO BANK OR CREDIT UNION GUARANTEE o NOT A DEPOSIT o NOT INSURED BY ANY FEDERAL GOVERNMENT AGENCY OR NCUA/NCUSIF - ------------------------------------------------------------------------------- 8/31/06 EIF-ANN LETTER FROM THE CEO [Photo of Robert J. Manning] Dear Shareholders: The story is as old as the tortoise and the hare, but we believe it is still relevant today -- "slow and steady" is the way to go when it comes to investing. While financial markets will naturally ebb and flow over time, investors who remain committed to a long-term investment strategy are more likely to achieve their goals than those who consistently chase short-term performance. The first half of 2006 brought a high degree of fluctuation in markets around the globe as varying economic factors pulled markets in opposite directions. The global economy, for example, continued to grow at its fastest pace in three decades -- spurred by increased international trade, good job growth, and wage increases. At the same time, central banks around the world raised interest rates in sync in a collaborative attempt to curb inflation. While this was a positive development in some regions, in other cases, economic and market gains were tempered. What does all of this mean to you as an investor? If you're focused on the long term, these global developments become part of a longer cycle instead of one-time events that can have a significant impact on your portfolio. At MFS(R), our investment management process -- honed over 80 years -- combines a unique teamwork approach with an unwavering focus on helping you realize your long-term financial goals. We believe in a three-pronged investment strategy: o ALLOCATE holdings across the major asset classes -- including stocks, bonds, and cash. o DIVERSIFY within each class to take advantage of different market segments and investing styles. o REBALANCE assets regularly to maintain a desired asset allocation. Of course, these strategies cannot guarantee a profit or protect against a loss. Investing and planning for the long term requires diligence and patience, two traits that in our experience are essential to capitalizing on the many opportunities the financial markets can offer -- through both up and down economic cycles. Respectfully, /s/ Robert J. Manning Robert J. Manning Chief Executive Officer and Chief Investment Officer MFS Investment Management(R) October 13, 2006 The opinions expressed in this letter are subject to change, may not be relied upon for investment advice, and no forecasts can be guaranteed. PORTFOLIO COMPOSITION PORTFOLIO STRUCTURE Common Stocks 98.6% Cash & Other Net Assets 1.4% TOP TEN HOLDINGS Bank of America Corp. 4.7% ------------------------------------------------ Altria Group, Inc. 4.0% ------------------------------------------------ Lockheed Martin Corp. 3.3% ------------------------------------------------ Citigroup, Inc. 3.2% ------------------------------------------------ Allstate Corp. 3.2% ------------------------------------------------ Goldman Sachs Group, Inc. 3.0% ------------------------------------------------ Metlife, Inc. 2.9% ------------------------------------------------ Johnson & Johnson 2.8% ------------------------------------------------ Exxon Mobil Corp. 2.4% ------------------------------------------------ TOTAL S.A., ADR 2.4% ------------------------------------------------ EQUITY SECTORS Financial Services 31.3% ------------------------------------------------ Energy 11.9% ------------------------------------------------ Industrial Goods & Services 11.3% ------------------------------------------------ Utilities & Communications 9.3% ------------------------------------------------ Health Care 8.2% ------------------------------------------------ Consumer Staples 8.1% ------------------------------------------------ Basic Materials 5.6% ------------------------------------------------ Autos & Housing 2.7% ------------------------------------------------ Retailing 2.7% ------------------------------------------------ Technology 2.6% ------------------------------------------------ Transportation 2.0% ------------------------------------------------ Leisure 1.8% ------------------------------------------------ Special Products & Services 1.1% ------------------------------------------------ Percentages are based on net assets as of 8/31/06. The portfolio is actively managed and current holdings may be different. MANAGEMENT REVIEW SUMMARY OF RESULTS For the twelve months ended August 31, 2006, Class A shares of the MFS Value Fund provided a return of 12.36%, at net asset value. In comparison, the fund's benchmark, the Russell 1000 Value Index, returned 13.96%. DETRACTORS FROM PERFORMANCE Stock selection within the utilities and communications sector detracted from relative results. Our holdings of Sprint Nextel were among the fund's top detractors for the period. In our opinion, the stock was down due to weaker-than-expected net new subscribers and worries regarding the quality of their subscriber base. The fund's holdings in wireless phone service provider Vodafone also held back relative performance. Not holding benchmark constituents Bellsouth and AT&T also detracted as both stocks performed strongly. Sub-par stock selection in the energy sector was another area of relative weakness. Our holdings in French integrated oil company TOTAL SA detracted from results as the stock underperformed the fund's index. Stock selection in the retailing sector was also disappointing. Overweighting weak-performing retailer Gap detracted from the fund's relative performance. Other stocks that held back relative results included health care company Johnson & Johnson. We believe that Johnson & Johnson's share price was under pressure during the period due to concerns surrounding its pharmaceutical patent expirations and a maturation of the drug eluding stent business. Home improvement product maker Masco and our underweighted position in global financial services firm JP Morgan Chase* also hurt relative returns. Avoiding household products maker and benchmark constituent Proctor & Gamble also had a negative impact on relative performance. CONTRIBUTORS TO PERFORMANCE Stock selection in the industrial goods and services sector was the primary driver of positive performance relative to the benchmark. Our positioning in defense contractor Lockheed Martin, which is not a benchmark constituent, was beneficial to performance as the company continued to report quarterly results that exceeded expectations and the stock outperformed the fund's index. Underweighting the relatively weak leisure sector helped our performance versus the benchmark. Avoiding media company Time Warner* for a majority of the period was beneficial as the stock declined moderately. Stock selection in the financial services sector also bolstered relative performance. Investment banking firm Goldman Sachs contributed significantly to relative returns. Throughout the year Goldman Sachs delivered earnings results that exceeded expectations and completed a substantial share repurchase program. Our holdings in Swiss investment management and banking firm UBS AG and diversified financial services firm PNC Bank were also top contributors. Stocks in other sectors that contributed to performance included management consulting firm Accenture, which was up markedly over the period, and oilseeds, corn, and wheat producer Archer-Daniels Midland*. Elsewhere, agrochemical company Syngenta added to relative results as the stock was up over the period. Our overweighted position in tobacco giant Altria Group also helped, due to good quarterly earnings and favorable litigation results. Overweighting Merck also proved beneficial as the company reduced expenses and delivered solid quarterly results over the period. Respectfully, Nevin Chitkara Steven Gorham Portfolio Manager Portfolio Manager * Security was not held in the portfolio at period end. The views expressed in this report are those of the portfolio managers only through the end of the period of the report, as stated on the cover, and do not necessarily reflect the views of MFS or any other person in the MFS organization. These views are subject to change at any time based on market and other conditions, and MFS disclaims any responsibility to update such views. These views may not be relied upon as investment advice or as an indication of trading intent on behalf of any MFS portfolio. References to specific securities are not recommendations of such securities and may not be representative of any MFS portfolio's current or future investments. PERFORMANCE SUMMARY THROUGH 8/31/06 The following chart illustrates the historical performance of the fund's Class A shares in comparison to its benchmark. Performance results include the deduction of the maximum applicable sales charge and reflect the percentage change in net asset value, including reinvestment of dividends and capital gains distributions. The performance of other share classes will be greater than or less than that of the class depicted below. Benchmark comparisons are unmanaged; do not reflect sales charges, commissions or expenses; and cannot be invested in directly. (See Notes to Performance Summary.) PERFORMANCE DATA SHOWN REPRESENTS PAST PERFORMANCE AND IS NO GUARANTEE OF FUTURE RESULTS. INVESTMENT RETURN AND PRINCIPAL VALUE FLUCTUATE SO YOUR SHARES, WHEN SOLD, MAY BE WORTH MORE OR LESS THAN THE ORIGINAL COST; CURRENT PERFORMANCE MAY BE LOWER OR HIGHER THAN QUOTED. FOR MOST RECENT MONTH-END PERFORMANCE, PLEASE VISIT MFS.COM. (FOR THE MOST RECENT MONTH-END PERFORMANCE FOR CLASS I SHARES CALL 1-800-343-2829.) THE PERFORMANCE SHOWN DOES NOT REFLECT THE DEDUCTION OF TAXES, IF ANY, THAT A SHAREHOLDER WOULD PAY ON FUND DISTRIBUTIONS OR THE REDEMPTION OF FUND SHARES. GROWTH OF A HYPOTHETICAL $10,000 INVESTMENT MFS Value Russell 1000 Fund - Class A Value Index 8/96 $ 9,425 $10,000 8/97 13,011 13,954 8/98 14,248 14,497 8/99 17,760 18,857 8/00 20,530 19,641 8/01 21,184 19,421 8/02 19,142 16,870 8/03 20,333 18,832 8/04 23,816 22,131 8/05 27,474 25,861 8/06 30,870 29,471 TOTAL RETURNS THROUGH 8/31/06 AVERAGE ANNUAL WITHOUT SALES CHARGE Share class Class inception date 1-yr 5-yr 10-yr - ----------------------------------------------------------------------------- A 1/02/96 12.36% 7.82% 12.60% - ----------------------------------------------------------------------------- B 11/04/97 11.66% 7.12% 11.96% - ----------------------------------------------------------------------------- C 11/05/97 11.65% 7.12% 11.96% - ----------------------------------------------------------------------------- I 1/02/97 12.78% 8.19% 12.90% - ----------------------------------------------------------------------------- W 5/01/06 12.44% 7.84% 12.60% - ----------------------------------------------------------------------------- R 12/31/02 12.22% 7.71% 12.54% - ----------------------------------------------------------------------------- R1 4/01/05 11.51% 7.59% 12.47% - ----------------------------------------------------------------------------- R2 4/01/05 11.96% 7.70% 12.53% - ----------------------------------------------------------------------------- R3 10/31/03 12.03% 7.61% 12.48% - ----------------------------------------------------------------------------- R4 4/01/05 12.33% 7.81% 12.59% - ----------------------------------------------------------------------------- R5 4/01/05 12.64% 7.90% 12.64% - ----------------------------------------------------------------------------- 529A 7/31/02 12.11% 7.58% 12.47% - ----------------------------------------------------------------------------- 529B 7/31/02 11.39% 7.04% 12.19% - ----------------------------------------------------------------------------- 529C 7/31/02 11.39% 7.04% 12.19% - ----------------------------------------------------------------------------- AVERAGE ANNUAL Comparative benchmark - ----------------------------------------------------------------------------- Russell 1000 Value Index (f) 13.96% 8.70% 11.41% - ----------------------------------------------------------------------------- AVERAGE ANNUAL WITH SALES CHARGE Share class - ----------------------------------------------------------------------------- A 5.90% 6.55% 11.93% With Initial Sales Charge (5.75%) - ----------------------------------------------------------------------------- B 7.66% 6.82% 11.96% With CDSC (Declining over six years from 4% to 0%) (x) - ----------------------------------------------------------------------------- C 10.65% 7.12% 11.96% With CDSC (1% for 12 months) (x) - ----------------------------------------------------------------------------- 529A 5.66% 6.31% 11.81% With Initial Sales Charge (5.75%) - ----------------------------------------------------------------------------- 529B 7.39% 6.73% 12.19% With CDSC (Declining over six years from 4% to 0%) (x) - ----------------------------------------------------------------------------- 529C 10.39% 7.04% 12.19% With CDSC (1% for 12 months) (x) - ----------------------------------------------------------------------------- Class I, W, R, R1, R2, R3, R4, and R5 shares do not have a sales charge. Please see Notes to Performance Summary for more details. CDSC - Contingent Deferred Sales Charge. (f) Source: FactSet Research Systems Inc. (x) Assuming redemption at the end of the applicable period. INDEX DEFINITION Russell 1000 Value Index - constructed to provide a comprehensive barometer for the value securities in the large-cap segment of the U.S. equity universe. Companies in this index generally have lower price-to-book ratios and lower forecasted growth values. It is not possible to invest directly in an index. NOTES TO PERFORMANCE SUMMARY Class R shares are available only to existing Class R shareholders. Class I shares are only available to certain eligible investors, and Class R1, R2, R3, R4, and R5 shares are only available to certain retirement plans. Class 529 shares are only available in conjunction with qualified tuition programs, such as the MFS 529 Savings Plan. There also is an additional annual fee, which is detailed in the program description, on qualified tuition programs. If this fee was reflected, the performance for Class 529 shares would have been lower. This annual fee is waived for Oregon residents and for those accounts with assets of $25,000 or more. Class W shares are intended for purchase only through fee-based wrap programs sponsored by financial intermediaries, such as brokerage firms and investment advisers, that have entered into an agreement with the fund's distributor to offer Class W shares to their wrap program clients. The use of Class W shares by a financial intermediary sponsor of a fee-based program will depend on, among other things, the structure of the particular fee-based wrap program. Class W shares may be purchased at net asset value without an initial sales charge or CDSC upon redemption. Performance for share classes offered after Class A shares includes the performance of the fund's Class A shares for periods prior to their offering. This blended class performance has been adjusted to take into account differences in sales loads, if any, applicable to these share classes, but has not been adjusted to take into account differences in class specific operating expenses (such as Rule 12b-1 fees). Compared to performance these share classes would have experienced had they been offered for the entire period, the use of blended performance generally results in higher performance for share classes with higher operating expenses than the share class to which it is blended, and lower performance for share classes with lower operating expenses than the share class to which it is blended. Performance results reflect any applicable expense subsidies and waivers in effect during the periods shown. Without such subsidies and waivers the fund's performance results would be less favorable. Please see the prospectus and financial statements for complete details. From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower. EXPENSE TABLE Fund expenses borne by the shareholders during the period, March 1, 2006 through August 31, 2006. As a shareholder of the fund, you incur two types of costs: (1) transaction costs, including sales charges (loads) on certain purchase or redemption payments and redemption fees on certain exchanges and redemptions, and (2) ongoing costs, including management fees; distribution and service (12b-1) fees; and other fund expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in the fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period March 1, 2006 through August 31, 2006. ACTUAL EXPENSES The first line for each share class in the following table provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number in the first line under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. HYPOTHETICAL EXAMPLE FOR COMPARISON PURPOSES The second line for each share class in the following table provides information about hypothetical account values and hypothetical expenses based on the fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs, such as sales charges (loads) or redemption fees. Therefore, the second line for each share class in the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher. - ------------------------------------------------------------------------------- Expenses Paid During Annualized Beginning Ending Period(p) Share Expense Account Value Account Value 3/01/06- Class Ratio 3/01/06 8/31/06 8/31/06 - ------------------------------------------------------------------------------- Actual 1.14% $1,000.00 $1,054.10 $5.90 A ------------------------------------------------------------------------ Hypothetical(h) 1.14% $1,000.00 $1,019.46 $5.80 - -------------------------------------------------------------------------------- Actual 1.79% $1,000.00 $1,050.90 $9.25 B ------------------------------------------------------------------------ Hypothetical(h) 1.79% $1,000.00 $1,016.18 $9.10 - -------------------------------------------------------------------------------- Actual 1.79% $1,000.00 $1,050.60 $9.25 C ------------------------------------------------------------------------ Hypothetical(h) 1.79% $1,000.00 $1,016.18 $9.10 - -------------------------------------------------------------------------------- Actual 0.79% $1,000.00 $1,056.10 $4.09 I ------------------------------------------------------------------------ Hypothetical(h) 0.79% $1,000.00 $1,021.22 $4.02 - -------------------------------------------------------------------------------- Actual 0.91% $1,000.00 $1,010.50 (i) $3.08 (i) W ------------------------------------------------------------------------ Hypothetical(h) 0.91% $1,000.00 $1,013.78 (i) $3.09 (i) - -------------------------------------------------------------------------------- Actual 1.29% $1,000.00 $1,053.30 $6.68 R ------------------------------------------------------------------------ Hypothetical(h) 1.29% $1,000.00 $1,018.70 $6.56 - -------------------------------------------------------------------------------- Actual 1.90% $1,000.00 $1,049.80 $9.82 R1 ------------------------------------------------------------------------ Hypothetical(h) 1.90% $1,000.00 $1,015.63 $9.65 - -------------------------------------------------------------------------------- Actual 1.55% $1,000.00 $1,052.00 $8.02 R2 ------------------------------------------------------------------------ Hypothetical(h) 1.55% $1,000.00 $1,017.39 $7.88 - -------------------------------------------------------------------------------- Actual 1.45% $1,000.00 $1,052.30 $7.50 R3 ------------------------------------------------------------------------ Hypothetical(h) 1.45% $1,000.00 $1,017.90 $7.38 - -------------------------------------------------------------------------------- Actual 1.21% $1,000.00 $1,053.90 $6.26 R4 ------------------------------------------------------------------------ Hypothetical(h) 1.21% $1,000.00 $1,019.11 $6.16 - -------------------------------------------------------------------------------- Actual 0.89% $1,000.00 $1,055.30 $4.61 R5 ------------------------------------------------------------------------ Hypothetical(h) 0.89% $1,000.00 $1,020.72 $4.53 - -------------------------------------------------------------------------------- Actual 1.39% $1,000.00 $1,053.10 $7.19 529A ------------------------------------------------------------------------ Hypothetical(h) 1.39% $1,000.00 $1,018.20 $7.07 - -------------------------------------------------------------------------------- Actual 2.04% $1,000.00 $1,049.40 $10.54 529B ------------------------------------------------------------------------ Hypothetical(h) 2.04% $1,000.00 $1,014.92 $10.36 - -------------------------------------------------------------------------------- Actual 2.04% $1,000.00 $1,049.30 $10.54 529C ------------------------------------------------------------------------ Hypothetical(h) 2.04% $1,000.00 $1,014.92 $10.36 - -------------------------------------------------------------------------------- (h) 5% class return per year before expenses. (i) For the period from the class' inception May 1, 2006 through the stated period end. (p) Expenses paid is equal to each class' annualized expense ratio, as shown above, multiplied by the average account value over the period, multiplied by the number of days in the period, divided by the number of days in the year. Expenses paid do not include any applicable sales charges (loads) or redemption fees. If these transaction costs had been included, your costs would have been higher. PORTFOLIO OF INVESTMENTS 8/31/06 The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes. Common Stocks - 98.6% - ------------------------------------------------------------------------------------------------------------ ISSUER SHARES/PAR VALUE ($) - ------------------------------------------------------------------------------------------------------------ Aerospace - 7.3% - ------------------------------------------------------------------------------------------------------------ Lockheed Martin Corp. 3,388,680 $ 279,904,968 Northrop Grumman Corp. 2,800,790 187,120,780 United Technologies Corp. 2,322,200 145,625,162 --------------- $ 612,650,910 - ------------------------------------------------------------------------------------------------------------ Alcoholic Beverages - 1.0% - ------------------------------------------------------------------------------------------------------------ Diageo PLC 4,886,799 $ 87,037,863 - ------------------------------------------------------------------------------------------------------------ Apparel Manufacturers - 1.1% - ------------------------------------------------------------------------------------------------------------ NIKE, Inc., "B" 1,097,860 $ 88,663,174 - ------------------------------------------------------------------------------------------------------------ Automotive - 0.4% - ------------------------------------------------------------------------------------------------------------ Johnson Controls, Inc. (l) 479,440 $ 34,486,119 - ------------------------------------------------------------------------------------------------------------ Broadcasting - 1.4% - ------------------------------------------------------------------------------------------------------------ Viacom, Inc., "B" (n) 1,827,051 $ 66,321,951 Walt Disney Co. (l) 1,053,280 31,229,752 WPP Group PLC 1,770,660 21,586,751 --------------- $ 119,138,454 - ------------------------------------------------------------------------------------------------------------ Brokerage & Asset Managers - 5.6% - ------------------------------------------------------------------------------------------------------------ Franklin Resources, Inc. 408,540 $ 40,204,421 Goldman Sachs Group, Inc. 1,669,160 248,120,634 Lehman Brothers Holdings, Inc. 877,430 55,988,808 Mellon Financial Corp. 1,979,150 73,683,755 Merrill Lynch & Co., Inc. 668,620 49,163,629 --------------- $ 467,161,247 - ------------------------------------------------------------------------------------------------------------ Business Services - 1.1% - ------------------------------------------------------------------------------------------------------------ Accenture Ltd., "A" (l) 3,235,020 $ 95,950,693 - ------------------------------------------------------------------------------------------------------------ Chemicals - 3.3% - ------------------------------------------------------------------------------------------------------------ Dow Chemical Co. 1,566,760 $ 59,740,559 Nalco Holding Co. (n) 1,016,120 18,909,993 PPG Industries, Inc. 1,672,680 105,981,005 Syngenta AG 608,320 89,346,845 --------------- $ 273,978,402 - ------------------------------------------------------------------------------------------------------------ Computer Software - 1.1% - ------------------------------------------------------------------------------------------------------------ Oracle Corp. (n) 4,574,410 $ 71,589,517 Symantec Corp. (n) 1,242,280 23,156,099 --------------- $ 94,745,616 - ------------------------------------------------------------------------------------------------------------ Construction - 2.3% - ------------------------------------------------------------------------------------------------------------ Masco Corp. (l) 5,789,120 $ 158,679,779 Sherwin-Williams Co. (l) 712,060 36,770,778 --------------- $ 195,450,557 - ------------------------------------------------------------------------------------------------------------ Containers - 0.2% - ------------------------------------------------------------------------------------------------------------ Smurfit-Stone Container Corp. (l)(n) 1,490,870 $ 16,981,009 - ------------------------------------------------------------------------------------------------------------ Electrical Equipment - 1.4% - ------------------------------------------------------------------------------------------------------------ Cooper Industries Ltd., "A" (l) 596,160 $ 48,813,581 Tyco International Ltd. 692,920 18,119,858 W.W. Grainger, Inc. (l) 803,320 53,661,776 --------------- $ 120,595,215 - ------------------------------------------------------------------------------------------------------------ Electronics - 1.0% - ------------------------------------------------------------------------------------------------------------ Analog Devices, Inc. (l) 840,100 $ 25,740,664 Intel Corp. 2,769,540 54,116,812 --------------- $ 79,857,476 - ------------------------------------------------------------------------------------------------------------ Energy - Independent - 2.2% - ------------------------------------------------------------------------------------------------------------ Apache Corp. 944,790 $ 61,675,891 Devon Energy Corp. 1,022,170 63,875,403 EOG Resources, Inc. (l) 836,470 54,219,985 --------------- $ 179,771,279 - ------------------------------------------------------------------------------------------------------------ Energy - Integrated - 9.5% - ------------------------------------------------------------------------------------------------------------ BP PLC, ADR (l) 1,269,070 $ 86,360,214 Chevron Corp. 1,027,624 66,178,986 ConocoPhillips 2,537,380 160,946,013 Exxon Mobil Corp. 3,001,280 203,096,618 Hess Corp. 1,662,730 76,119,779 TOTAL S.A., ADR 2,949,710 198,898,945 --------------- $ 791,600,555 - ------------------------------------------------------------------------------------------------------------ Food & Beverages - 3.1% - ------------------------------------------------------------------------------------------------------------ Kellogg Co. 2,105,430 $ 106,745,301 Nestle S.A. (l) 206,070 70,892,569 PepsiCo, Inc. (l) 663,826 43,334,561 Sara Lee Corp. 2,299,850 38,246,506 --------------- $ 259,218,937 - ------------------------------------------------------------------------------------------------------------ Forest & Paper Products - 0.7% - ------------------------------------------------------------------------------------------------------------ Bowater, Inc. (l) 565,690 $ 12,858,134 International Paper Co. (l) 1,378,720 47,938,094 --------------- $ 60,796,228 - ------------------------------------------------------------------------------------------------------------ General Merchandise - 0.5% - ------------------------------------------------------------------------------------------------------------ Federated Department Stores, Inc. (l) 1,203,070 $ 45,692,599 - ------------------------------------------------------------------------------------------------------------ Health Maintenance Organizations - 1.1% - ------------------------------------------------------------------------------------------------------------ CIGNA Corp. 372,680 $ 42,138,928 WellPoint, Inc. (n) 669,670 51,839,155 --------------- $ 93,978,083 - ------------------------------------------------------------------------------------------------------------ Insurance - 8.9% - ------------------------------------------------------------------------------------------------------------ AFLAC, Inc. 382,100 $ 17,221,247 Allstate Corp. 4,675,050 270,872,397 Chubb Corp. 1,053,020 52,819,483 Genworth Financial, Inc., "A" 2,240,810 77,151,088 Hartford Financial Services Group, Inc. 953,605 81,876,525 MetLife, Inc. 4,430,480 243,809,314 --------------- $ 743,750,054 - ------------------------------------------------------------------------------------------------------------ Leisure & Toys - 0.4% - ------------------------------------------------------------------------------------------------------------ Hasbro, Inc. 1,457,390 $ 29,585,017 - ------------------------------------------------------------------------------------------------------------ Machinery & Tools - 2.6% - ------------------------------------------------------------------------------------------------------------ Deere & Co. (l) 2,475,026 $ 193,299,531 Finning International, Inc. 276,730 9,952,911 Illinois Tool Works, Inc. 370,240 16,253,536 --------------- $ 219,505,978 - ------------------------------------------------------------------------------------------------------------ Major Banks - 9.1% - ------------------------------------------------------------------------------------------------------------ Bank of America Corp. 7,588,555 $ 390,582,926 Bank of New York Co., Inc. 2,422,930 81,773,888 PNC Financial Services Group, Inc. 1,658,230 117,386,102 SunTrust Banks, Inc. 2,272,250 173,599,900 --------------- $ 763,342,816 - ------------------------------------------------------------------------------------------------------------ Network & Telecom - 0.5% - ------------------------------------------------------------------------------------------------------------ Cisco Systems, Inc. (l)(n) 1,925,870 $ 42,349,881 - ------------------------------------------------------------------------------------------------------------ Oil Services - 0.2% - ------------------------------------------------------------------------------------------------------------ Noble Corp. 221,980 $ 14,515,272 - ------------------------------------------------------------------------------------------------------------ Other Banks & Diversified Financials - 7.7% - ------------------------------------------------------------------------------------------------------------ American Express Co. 1,458,460 $ 76,627,488 Citigroup, Inc. 5,490,610 270,961,604 Fannie Mae 2,811,640 148,032,846 Freddie Mac 631,150 40,141,140 UBS AG (l) 1,950,281 110,409,714 --------------- $ 646,172,792 - ------------------------------------------------------------------------------------------------------------ Pharmaceuticals - 7.1% - ------------------------------------------------------------------------------------------------------------ Abbott Laboratories 1,031,230 $ 50,220,901 Eli Lilly & Co. 1,184,540 66,251,322 Johnson & Johnson 3,631,490 234,812,143 Merck & Co., Inc. 3,177,280 128,838,704 Wyeth (l) 2,261,130 110,117,031 --------------- $ 590,240,101 - ------------------------------------------------------------------------------------------------------------ Railroad & Shipping - 1.7% - ------------------------------------------------------------------------------------------------------------ Burlington Northern Santa Fe Corp. 1,418,990 $ 95,001,381 Norfolk Southern Corp. (l) 1,142,260 48,808,770 --------------- $ 143,810,151 - ------------------------------------------------------------------------------------------------------------ Specialty Chemicals - 1.4% - ------------------------------------------------------------------------------------------------------------ Air Products & Chemicals, Inc. 967,298 $ 64,122,184 Praxair, Inc. (l) 913,900 52,466,999 --------------- $ 116,589,183 - ------------------------------------------------------------------------------------------------------------ Specialty Stores - 1.1% - ------------------------------------------------------------------------------------------------------------ Gap, Inc. 3,970,670 $ 66,746,963 Home Depot, Inc. 828,500 28,409,265 --------------- $ 95,156,228 - ------------------------------------------------------------------------------------------------------------ Telecommunications - Wireless - 0.8% - ------------------------------------------------------------------------------------------------------------ Vodafone Group PLC 32,689,923 $ 70,833,293 - ------------------------------------------------------------------------------------------------------------ Telephone Services - 2.8% - ------------------------------------------------------------------------------------------------------------ Embarq Corp. 857,879 $ 40,448,995 Sprint Nextel Corp. 8,236,590 139,363,103 Verizon Communications, Inc. 1,448,480 50,957,526 --------------- $ 230,769,624 - ------------------------------------------------------------------------------------------------------------ Tobacco - 4.0% - ------------------------------------------------------------------------------------------------------------ Altria Group, Inc. 4,025,180 $ 336,223,285 - ------------------------------------------------------------------------------------------------------------ Trucking - 0.3% - ------------------------------------------------------------------------------------------------------------ Con-way, Inc. (l) 142,160 $ 6,802,356 United Parcel Service, Inc., "B" (l) 259,650 18,188,483 --------------- $ 24,990,839 - ------------------------------------------------------------------------------------------------------------ Utilities - Electric Power - 5.7% - ------------------------------------------------------------------------------------------------------------ Dominion Resources, Inc. (l) 2,328,680 $ 186,038,245 Entergy Corp. 434,050 33,703,983 Exelon Corp. 510,540 31,132,729 FPL Group, Inc. (l) 2,699,110 119,975,440 PPL Corp. (l) 837,310 29,280,731 Public Service Enterprise Group, Inc. 345,020 24,158,300 TXU Corp. 799,610 52,942,178 --------------- $ 477,231,606 - ------------------------------------------------------------------------------------------------------------ TOTAL COMMON STOCKS (IDENTIFIED COST, $6,493,316,300) $ 8,262,820,536 - ------------------------------------------------------------------------------------------------------------ Collateral for Securities Loaned - 1.2% - ------------------------------------------------------------------------------------------------------------ Navigator Securities Lending Prime Portfolio, at Cost and Net Asset Value 100,915,456 $ 100,915,456 - ------------------------------------------------------------------------------------------------------------ Repurchase Agreements - 1.4% - ------------------------------------------------------------------------------------------------------------ Merrill Lynch, 5.25%, dated 8/31/06, total to be received $114,192,746 (secured by U.S. Treasury and Federal Agency obligations and Mortgage Backed Securities in a jointly traded account), at Cost $ 114,176,000 $ 114,176,000 - ------------------------------------------------------------------------------------------------------------ Short-term Obligations - 0.5% - ------------------------------------------------------------------------------------------------------------ CRC Funding LLC, 5.26%, due 9/01/06 (t)(y) $ 39,567,000 $ 39,567,000 - ------------------------------------------------------------------------------------------------------------ TOTAL INVESTMENTS (IDENTIFIED COST, $6,747,974,756) $ 8,517,478,992 - ------------------------------------------------------------------------------------------------------------ Other Assets, Less Liabilities - (1.7)% (141,796,941) - ------------------------------------------------------------------------------------------------------------ NET ASSETS - 100.0% $ 8,375,682,051 - ------------------------------------------------------------------------------------------------------------ (l) All or a portion of this security is on loan. (n) Non-income producing security. (t) Security exempt from registration with the U.S. Securities and Exchange Commission under Section 4(2) of the Securities Act of 1933. (y) The rate shown represents an annualized yield at time of purchase. The following abbreviations are used in this report and are defined: ADR American Depository Receipt SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENT OF ASSETS AND LIABILITIES At 8/31/06 This statement represents your fund's balance sheet, which details the assets and liabilities comprising the total value of the fund. ASSETS - ------------------------------------------------------------------------------------------------------- Investments, at value, including $98,600,103 of securities on loan (identified cost, $6,747,974,756) $8,517,478,992 Cash 85 Receivable for investments sold 37,473,277 Receivable for fund shares sold 13,202,023 Interest and dividends receivable 23,568,019 Other assets 35,623 - ------------------------------------------------------------------------------------------------------- Total assets $8,591,758,019 - ------------------------------------------------------------------------------------------------------- LIABILITIES - ------------------------------------------------------------------------------------------------------- Payable for investments purchased $96,692,889 Payable for fund shares reacquired 16,715,765 Collateral for securities loaned, at value 100,915,456 Payable to affiliates Management fee 272,646 Shareholder servicing costs 661,168 Distribution and service fees 209,795 Administrative services fee 3,356 Program manager fees 84 Retirement plan administration and services fees 1,091 Payable for independent trustees' compensation 10,557 Accrued expenses and other liabilities 593,161 - ------------------------------------------------------------------------------------------------------- Total liabilities $216,075,968 - ------------------------------------------------------------------------------------------------------- Net assets $8,375,682,051 - ------------------------------------------------------------------------------------------------------- NET ASSETS CONSIST OF: - ------------------------------------------------------------------------------------------------------- Paid-in capital $6,381,614,684 Unrealized appreciation (depreciation) on investments and translation of assets and liabilities in foreign currencies 1,769,510,426 Accumulated net realized gain (loss) on investments and foreign currency transactions 190,777,980 Undistributed net investment income 33,778,961 - ------------------------------------------------------------------------------------------------------- Net assets $8,375,682,051 - ------------------------------------------------------------------------------------------------------- Shares of beneficial interest outstanding 332,709,320 - ------------------------------------------------------------------------------------------------------- Statement of Assets and Liabilities - continued Class A shares - ------------------------------------------------------------------------------------------------------- Net assets $4,929,524,706 Shares outstanding 195,595,060 - ------------------------------------------------------------------------------------------------------- Net asset value per share $25.20 - ------------------------------------------------------------------------------------------------------- Offering price per share (100/94.25Xnet asset value per share) $26.74 - ------------------------------------------------------------------------------------------------------- Class B shares - ------------------------------------------------------------------------------------------------------- Net assets $1,139,651,203 Shares outstanding 45,514,252 - ------------------------------------------------------------------------------------------------------- Net asset value and offering price per share $25.04 - ------------------------------------------------------------------------------------------------------- Class C shares - ------------------------------------------------------------------------------------------------------- Net assets $881,538,386 Shares outstanding 35,246,365 - ------------------------------------------------------------------------------------------------------- Net asset value and offering price per share $25.01 - ------------------------------------------------------------------------------------------------------- Class I shares - ------------------------------------------------------------------------------------------------------- Net assets $1,162,665,270 Shares outstanding 45,925,427 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $25.32 - ------------------------------------------------------------------------------------------------------- Class W shares - ------------------------------------------------------------------------------------------------------- Net assets $8,952,011 Shares outstanding 355,223 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $25.20 - ------------------------------------------------------------------------------------------------------- Class R shares - ------------------------------------------------------------------------------------------------------- Net assets $101,162,207 Shares outstanding 4,022,695 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $25.15 - ------------------------------------------------------------------------------------------------------- Class R1 shares - ------------------------------------------------------------------------------------------------------- Net assets $4,639,476 Shares outstanding 186,087 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $24.93 - ------------------------------------------------------------------------------------------------------- Class R2 shares - ------------------------------------------------------------------------------------------------------- Net assets $4,520,321 Shares outstanding 180,611 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $25.03 - ------------------------------------------------------------------------------------------------------- Statement of Assets and Liabilities - continued Class R3 shares - ------------------------------------------------------------------------------------------------------- Net assets $30,000,772 Shares outstanding 1,196,497 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $25.07 - ------------------------------------------------------------------------------------------------------- Class R4 shares - ------------------------------------------------------------------------------------------------------- Net assets $46,731,456 Shares outstanding 1,856,349 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $25.17 - ------------------------------------------------------------------------------------------------------- Class R5 shares - ------------------------------------------------------------------------------------------------------- Net assets $60,124,327 Shares outstanding 2,383,934 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $25.22 - ------------------------------------------------------------------------------------------------------- Class 529A shares - ------------------------------------------------------------------------------------------------------- Net assets $3,947,300 Shares outstanding 157,342 - ------------------------------------------------------------------------------------------------------- Net asset value per share $25.09 - ------------------------------------------------------------------------------------------------------- Offering price per share (100/94.25Xnet asset value per share) $26.62 - ------------------------------------------------------------------------------------------------------- Class 529B shares - ------------------------------------------------------------------------------------------------------- Net assets $946,021 Shares outstanding 38,041 - ------------------------------------------------------------------------------------------------------- Net asset value and offering price per share $24.87 - ------------------------------------------------------------------------------------------------------- Class 529C shares - ------------------------------------------------------------------------------------------------------- Net assets $1,278,595 Shares outstanding 51,437 - ------------------------------------------------------------------------------------------------------- Net asset value and offering price per share $24.86 - ------------------------------------------------------------------------------------------------------- On sales of $50,000 or more, the offering prices of Class A and Class 529A shares are reduced. A contingent deferred sales charge may be imposed on redemptions of Class A, Class B, Class C, Class 529B, and Class 529C shares. SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENT OF OPERATIONS Year ended 8/31/06 This statement describes how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations. NET INVESTMENT INCOME - ------------------------------------------------------------------------------------------------------ Income Dividends $199,375,915 Interest 5,456,846 Foreign taxes withheld (1,317,642) - ------------------------------------------------------------------------------------------------------ Total investment income $203,515,119 - ------------------------------------------------------------------------------------------------------ Expenses Management fee $47,845,272 Distribution and service fees 37,839,914 Program manager fees 13,439 Shareholder servicing costs 14,038,501 Administrative services fee 481,313 Retirement plan administration and services fees 128,097 Independent trustees' compensation 107,799 Custodian fee 1,107,614 Shareholder communications 620,100 Auditing fees 44,872 Legal fees 147,420 Miscellaneous 637,818 - ------------------------------------------------------------------------------------------------------ Total expenses $103,012,159 - ------------------------------------------------------------------------------------------------------ Fees paid indirectly (592,919) Reduction of expenses by investment adviser (302,287) - ------------------------------------------------------------------------------------------------------ Net expenses $102,116,953 - ------------------------------------------------------------------------------------------------------ Net investment income $101,398,166 - ------------------------------------------------------------------------------------------------------ Statement of Operations - continued REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS - ------------------------------------------------------------------------------------------------------ Realized gain (loss) (identified cost basis) Investment transactions $303,516,978 Foreign currency transactions 122,565 - ------------------------------------------------------------------------------------------------------ Net realized gain (loss) on investments and foreign currency transactions $303,639,543 - ------------------------------------------------------------------------------------------------------ Change in unrealized appreciation (depreciation) Investments $521,307,044 Translation of assets and liabilities in foreign currencies 8,773 - ------------------------------------------------------------------------------------------------------ Net unrealized gain (loss) on investments and foreign currency translation $521,315,817 - ------------------------------------------------------------------------------------------------------ Net realized and unrealized gain (loss) on investments and foreign currency $824,955,360 - ------------------------------------------------------------------------------------------------------ Change in net assets from operations $926,353,526 - ------------------------------------------------------------------------------------------------------ SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENTS OF CHANGES IN NET ASSETS These statements describe the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions. YEARS ENDED 8/31 -------------------------------------- 2006 2005 CHANGE IN NET ASSETS FROM OPERATIONS - ------------------------------------------------------------------------------------------------------- Net investment income $101,398,166 $75,352,542 Net realized gain (loss) on investments and foreign currency transactions 303,639,543 375,822,875 Net unrealized gain (loss) on investments and foreign currency translation 521,315,817 503,440,230 - ------------------------------------------------------------------------------------------------------- Change in net assets from operations $926,353,526 $954,615,647 - ------------------------------------------------------------------------------------------------------- DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------- From net investment income Class A $(56,268,368) $(46,363,055) Class B (6,779,390) (7,662,195) Class C (4,984,908) (5,049,720) Class I (15,180,640) (10,452,013) Class W (388) -- Class R (1,084,796) (695,925) Class R1 (14,051) (235) Class R2 (12,119) (89) Class R3 (160,191) (25,014) Class R4 (168,024) (145) Class R5 (571,771) (180) Class 529A (32,149) (21,518) Class 529B (2,874) (2,457) Class 529C (4,307) (3,600) Statements of Changes in Net Assets - continued YEARS ENDED 8/31 -------------------------------------- 2006 2005 DISTRIBUTIONS DECLARED TO SHAREHOLDERS - CONTINUED - ------------------------------------------------------------------------------------------------------- From net realized gain on investments and foreign currency transactions Class A (217,446,760) -- Class B (58,304,573) -- Class C (41,125,028) -- Class I (44,433,140) -- Class R (5,057,671) -- Class R1 (65,732) -- Class R2 (32,165) -- Class R3 (644,654) -- Class R4 (108,618) -- Class R5 (2,214,112) -- Class 529A (147,960) -- Class 529B (34,246) -- Class 529C (54,564) -- - ------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(454,933,199) $(70,276,146) - ------------------------------------------------------------------------------------------------------- Change in net assets from fund share transactions $224,602,050 $662,205,274 - ------------------------------------------------------------------------------------------------------- Redemption fees $-- $15,186 - ------------------------------------------------------------------------------------------------------- Total change in net assets $696,022,377 $1,546,559,961 - ------------------------------------------------------------------------------------------------------- NET ASSETS: - ------------------------------------------------------------------------------------------------------- At beginning of period 7,679,659,674 6,133,099,713 At end of period (including undistributed net investment income of $33,778,961 and $17,522,206, respectively) $8,375,682,051 $7,679,659,674 - ------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Statements FINANCIAL HIGHLIGHTS The financial highlights table is intended to help you understand the fund's financial performance for the past 5 years (or life of a particular share class, if shorter). Certain information reflects financial results for a single fund share. The total returns in the table represent the rate by which an investor would have earned (or lost) on an investment in the fund share class (assuming reinvestment of all distributions) held for the entire period. This information has been audited by the fund's independent registered public accounting firm, whose report, together with the fund's financial statements, are included in this report. CLASS A YEARS ENDED 8/31 ------------------------------------------------------------------------------------ 2006 2005 2004 2003 2002 Net asset value, beginning of period $23.81 $20.88 $18.03 $17.21 $19.28 - ------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.34 $0.28 $0.23 $0.24 $0.20 Net realized and unrealized gain (loss) on investments and foreign currency 2.48 2.91 2.84 0.81 (2.05) - ------------------------------------------------------------------------------------------------------------------------- Total from investment operations $2.82 $3.19 $3.07 $1.05 $(1.85) - ------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------------------- From net investment income $(0.29) $(0.26) $(0.22) $(0.23) $(0.15) From net realized gain on investments and foreign currency transactions (1.14) -- -- -- (0.07) - ------------------------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(1.43) $(0.26) $(0.22) $(0.23) $(0.22) - ------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $25.20 $23.81 $20.88 $18.03 $17.21 - ------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 12.36 15.36 17.13(b) 6.22 (9.64) - ------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions(f) 1.17 1.16 1.18 1.20 1.25 Expenses after expense reductions(f) 1.16 1.16 1.18 N/A N/A Net investment income 1.40 1.23 1.14 1.41 1.05 Portfolio turnover 26 24 42 55 48 Net assets at end of period (000 Omitted) $4,929,525 $4,554,484 $3,527,854 $3,039,085 $1,820,568 - ------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS B YEARS ENDED 8/31 ------------------------------------------------------------------------------------ 2006 2005 2004 2003 2002 Net asset value, beginning of period $23.66 $20.77 $17.94 $17.13 $19.19 - ------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.17 $0.13 $0.10 $0.12 $0.07 Net realized and unrealized gain (loss) on investments and foreign currency 2.49 2.90 2.83 0.81 (2.02) - ------------------------------------------------------------------------------------------------------------------------- Total from investment operations $2.66 $3.03 $2.93 $0.93 $(1.95) - ------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------------------- From net investment income $(0.14) $(0.14) $(0.10) $(0.12) $(0.04) From net realized gain on investments and foreign currency transactions (1.14) -- -- -- (0.07) - ------------------------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(1.28) $(0.14) $(0.10) $(0.12) $(0.11) - ------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $25.04 $23.66 $20.77 $17.94 $17.13 - ------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 11.66 14.61 16.35(b) 5.50 (10.20) - ------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions(f) 1.82 1.81 1.82 1.85 1.90 Expenses after expense reductions(f) 1.81 1.81 1.82 N/A N/A Net investment income 0.72 0.58 0.49 0.76 0.40 Portfolio turnover 26 24 42 55 48 Net assets at end of period (000 Omitted) $1,139,651 $1,262,029 $1,199,074 $1,069,389 $923,330 - ------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS C YEARS ENDED 8/31 ------------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $23.64 $20.75 $17.93 $17.12 $19.18 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.18 $0.13 $0.10 $0.12 $0.07 Net realized and unrealized gain (loss) on investments and foreign currency 2.47 2.90 2.82 0.81 (2.02) - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $2.65 $3.03 $2.92 $0.93 $(1.95) - -------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - -------------------------------------------------------------------------------------------------------------------------- From net investment income $(0.14) $(0.14) $(0.10) $(0.12) $(0.04) From net realized gain on investments and foreign currency transactions (1.14) -- -- -- (0.07) - -------------------------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(1.28) $(0.14) $(0.10) $(0.12) $(0.11) - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $25.01 $23.64 $20.75 $17.93 $17.12 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 11.65 14.63 16.32(b) 5.52 (10.21) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.82 1.81 1.82 1.85 1.90 Expenses after expense reductions (f) 1.81 1.81 1.82 N/A N/A Net investment income 0.74 0.58 0.49 0.76 0.40 Portfolio turnover 26 24 42 55 48 Net assets at end of period (000 Omitted) $881,538 $863,486 $761,669 $648,318 $473,537 - -------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS I YEARS ENDED 8/31 ------------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $23.91 $20.95 $18.10 $17.27 $19.35 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.43 $0.37 $0.30 $0.30 $0.27 Net realized and unrealized gain (loss) on investments and foreign currency 2.49 2.91 2.84 0.82 (2.06) - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $2.92 $3.28 $3.14 $1.12 $(1.79) - -------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - -------------------------------------------------------------------------------------------------------------------------- From net investment income $(0.37) $(0.32) $(0.29) $(0.29) $(0.22) From net realized gain on investments and foreign currency transactions (1.14) -- -- -- (0.07) - -------------------------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(1.51) $(0.32) $(0.29) $(0.29) $(0.29) - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $25.32 $23.91 $20.95 $18.10 $17.27 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 12.78 15.78 17.47(b) 6.61 (9.35) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 0.82 0.81 0.83 0.85 0.90 Expenses after expense reductions (f) 0.81 0.81 0.83 N/A N/A Net investment income 1.77 1.59 1.50 1.76 1.40 Portfolio turnover 26 24 42 55 48 Net assets at end of period (000 Omitted) $1,162,665 $899,654 $593,364 $296,961 $76,932 - -------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS W YEAR ENDED 8/31 --------------- 2006(i) Net asset value, beginning of period $25.04 - --------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - --------------------------------------------------------------------------------------------------- Net investment income (d) $0.24 Net realized and unrealized gain (loss) on investments and foreign currency 0.02(g) - --------------------------------------------------------------------------------------------------- Total from investment operations $0.26 - --------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - --------------------------------------------------------------------------------------------------- From net investment income $(0.10) - --------------------------------------------------------------------------------------------------- Net asset value, end of period $25.20 - --------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 1.05(n) - --------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - --------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 0.92(a) Expenses after expense reductions (f) 0.91(a) Net investment income 3.32(a) Portfolio turnover 26 Net assets at end of period (000 Omitted) $8,952 - --------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R YEARS ENDED 8/31 -------------------------------------------------------------- 2006 2005 2004 2003(i) Net asset value, beginning of period $23.76 $20.84 $18.01 $16.53 - ------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.30 $0.25 $0.21 $0.15 Net realized and unrealized gain (loss) on investments and foreign currency 2.49 2.90 2.82 1.45 - ------------------------------------------------------------------------------------------------------------------------- Total from investment operations $2.79 $3.15 $3.03 $1.60 - ------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------------------- From net investment income $(0.26) $(0.23) $(0.20) $(0.12) From net realized gain on investments and foreign currency transactions (1.14) -- -- -- - ------------------------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(1.40) $(0.23) $(0.20) $(0.12) - ------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $25.15 $23.76 $20.84 $18.01 - ------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 12.22 15.21 16.92(b) 9.76(n) - ------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.31 1.31 1.33 1.42(a) Expenses after expense reductions (f) 1.31 1.31 1.33 N/A Net investment income 1.24 1.10 1.02 1.26(a) Portfolio turnover 26 24 42 55 Net assets at end of period (000 Omitted) $101,162 $85,302 $47,970 $14,583 - ------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R1 YEARS ENDED 8/31 ------------------------------- 2006 2005(i) Net asset value, beginning of period $23.63 $23.17 - ------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.22 $0.09 Net realized and unrealized gain (loss) on investments and foreign currency 2.39 0.42(g) - ------------------------------------------------------------------------------------------------------------- Total from investment operations $2.61 $0.51 - ------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------- From net investment income $(0.17) $(0.05) From net realized gain on investments and foreign currency transactions (1.14) -- - ------------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(1.31) $(0.05) - ------------------------------------------------------------------------------------------------------------- Net asset value, end of period $24.93 $23.63 - ------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 11.51 2.21(n) - ------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.02 2.04(a) Expenses after expense reductions (f) 1.92 2.04(a) Net investment income 0.93 0.89(a) Portfolio turnover 26 24 Net assets at end of period (000 Omitted) $4,639 $574 - ------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R2 YEARS ENDED 8/31 ------------------------------- 2006 2005(i) Net asset value, beginning of period $23.67 $23.17 - ------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.30 $0.11 Net realized and unrealized gain (loss) on investments and foreign currency 2.42 0.43(g) - ------------------------------------------------------------------------------------------------------------- Total from investment operations $2.72 $0.54 - ------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------- From net investment income $(0.22) $(0.04) From net realized gain on investments and foreign currency transactions (1.14) -- - ------------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(1.36) $(0.04) - ------------------------------------------------------------------------------------------------------------- Net asset value, end of period $25.03 $23.67 - ------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 11.96 2.34(n) - ------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.71 1.73(a) Expenses after expense reductions (f) 1.57 1.73(a) Net investment income 1.33 1.49(a) Portfolio turnover 26 24 Net assets at end of period (000 Omitted) $4,520 $732 - ------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R3 YEARS ENDED 8/31 ----------------------------------------------- 2006 2005 2004(i) Net asset value, beginning of period $23.71 $20.84 $18.73 - --------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - --------------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.31 $0.21 $0.11 Net realized and unrealized gain (loss) on investments and foreign currency 2.43 2.88 2.12 - --------------------------------------------------------------------------------------------------------------------- Total from investment operations $2.74 $3.09 $2.23 - --------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - --------------------------------------------------------------------------------------------------------------------- From net investment income $(0.24) $(0.22) $(0.12) From net realized gain on investments and foreign currency transactions (1.14) -- -- - --------------------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(1.38) $(0.22) $(0.12) - --------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $25.07 $23.71 $20.84 - --------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 12.03 14.91 11.93(b)(n) - --------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - --------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.56 1.57 1.59(a) Expenses after expense reductions (f) 1.47 1.57 1.59(a) Net investment income 1.27 0.93 0.80(a) Portfolio turnover 26 24 42 Net assets at end of period (000 Omitted) $30,001 $8,316 $414 - --------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R4 YEARS ENDED 8/31 ------------------------------- 2006 2005(i) Net asset value, beginning of period $23.81 $23.29 - ------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.42 $0.15 Net realized and unrealized gain (loss) on investments and foreign currency 2.39 0.44(g) - ------------------------------------------------------------------------------------------------------------- Total from investment operations $2.81 $0.59 - ------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------- From net investment income $(0.31) $(0.07) From net realized gain on investments and foreign currency transactions (1.14) -- - ------------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(1.45) $(0.07) - ------------------------------------------------------------------------------------------------------------- Net asset value, end of period $25.17 $23.81 - ------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 12.33 2.53(n) - ------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.22 1.23(a) Expenses after expense reductions (f) 1.22 1.23(a) Net investment income 1.80 1.94(a) Portfolio turnover 26 24 Net assets at end of period (000 Omitted) $46,731 $400 - ------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R5 YEARS ENDED 8/31 ------------------------------- 2006 2005(i) Net asset value, beginning of period $23.83 $23.29 - ------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.45 $0.15 Net realized and unrealized gain (loss) on investments and foreign currency 2.43 0.47(g) - ------------------------------------------------------------------------------------------------------------- Total from investment operations $2.88 $0.62 - ------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------- From net investment income $(0.35) $(0.08) From net realized gain on investments and foreign currency transactions (1.14) -- - ------------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(1.49) $(0.08) - ------------------------------------------------------------------------------------------------------------- Net asset value, end of period $25.22 $23.83 - ------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 12.64 2.68(n) - ------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 0.92 0.92(a) Expenses after expense reductions (f) 0.91 0.92(a) Net investment income 1.80 1.57(a) Portfolio turnover 26 24 Net assets at end of period (000 Omitted) $60,124 $51 - ------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS 529A YEARS ENDED 8/31 ------------------------------------------------------------------------- 2006 2005 2004 2003 2002(i) Net asset value, beginning of period $23.71 $20.80 $18.00 $17.21 $16.84 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.28 $0.23 $0.18 $0.20 $0.03 Net realized and unrealized gain (loss) on investments and foreign currency 2.48 2.90 2.80 0.81 0.34 - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $2.76 $3.13 $2.98 $1.01 $0.37 - -------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - -------------------------------------------------------------------------------------------------------------------------- From net investment income $(0.24) $(0.22) $(0.18) $(0.22) $-- From net realized gain on investments and foreign currency transactions (1.14) -- -- -- -- - -------------------------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(1.38) $(0.22) $(0.18) $(0.22) $-- - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $25.09 $23.71 $20.80 $18.00 $17.21 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 12.11 15.09 16.63(b) 5.98 2.20(n) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.42 1.41 1.43 1.48 1.50(a) Expenses after expense reductions (f) 1.41 1.41 1.43 N/A N/A Net investment income 1.18 0.99 0.91 1.20 2.23(a) Portfolio turnover 26 24 42 55 48 Net assets at end of period (000 Omitted) $3,947 $2,914 $1,673 $806 $10 - -------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS 529B YEARS ENDED 8/31 ------------------------------------------------------------------------- 2006 2005 2004 2003 2002(i) Net asset value, beginning of period $23.52 $20.67 $17.87 $17.12 $16.76 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.13 $0.08 $0.05 $0.09 $0.02 Net realized and unrealized gain (loss) on investments and foreign currency 2.45 2.87 2.81 0.80 0.34 - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $2.58 $2.95 $2.86 $0.89 $0.36 - -------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - -------------------------------------------------------------------------------------------------------------------------- From net investment income $(0.09) $(0.10) $(0.06) $(0.14) $-- From net realized gain on investments and foreign currency transactions (1.14) -- -- -- -- - -------------------------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(1.23) $(0.10) $(0.06) $(0.14) $-- - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $24.87 $23.52 $20.67 $17.87 $17.12 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 11.39 14.32 16.03(b) 5.29 2.15(n) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.06 2.06 2.07 2.13 2.15(a) Expenses after expense reductions (f) 2.06 2.06 2.07 N/A N/A Net investment income 0.53 0.34 0.27 0.52 1.33(a) Portfolio turnover 26 24 42 55 48 Net assets at end of period (000 Omitted) $946 $655 $439 $181 $6 - -------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS 529C YEARS ENDED 8/31 ------------------------------------------------------------------------- 2006 2005 2004 2003 2002(i) Net asset value, beginning of period $23.51 $20.66 $17.86 $17.11 $16.75 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.12 $0.08 $0.05 $0.09 $0.02 Net realized and unrealized gain (loss) on investments and foreign currency 2.46 2.87 2.81 0.80 0.34 - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $2.58 $2.95 $2.86 $0.89 $0.36 - -------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - -------------------------------------------------------------------------------------------------------------------------- From net investment income $(0.09) $(0.10) $(0.06) $(0.14) $-- From net realized gain on investments and foreign currency transactions (1.14) -- -- -- -- - -------------------------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(1.23) $(0.10) $(0.06) $(0.14) $-- - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $24.86 $23.51 $20.66 $17.86 $17.11 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 11.39 14.32 16.03(b) 5.31 2.15(n) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.06 2.06 2.07 2.13 2.15(a) Expenses after expense reductions (f) 2.06 2.06 2.07 N/A N/A Net investment income 0.51 0.36 0.26 0.55 1.75(a) Portfolio turnover 26 24 42 55 48 Net assets at end of period (000 Omitted) $1,279 $1,062 $643 $352 $21 - -------------------------------------------------------------------------------------------------------------------------- Any redemption fees charged by the fund during the 2004 and 2005 fiscal years resulted in a per share impact of less than $0.01. (a) Annualized. (b) The fund's net asset value and total return calculation include a non-recurring accrual recorded as a result of an administrative proceeding regarding disclosure of brokerage allocation practices in connection with fund sales. The non-recurring accrual did not have a material impact on the net asset value per share based on the shares outstanding on the day the proceeds were recorded. (d) Per share data are based on average shares outstanding. (f) Ratios do not reflect reductions from fees paid indirectly. (g) The per share amount is not in accordance with the net realized and unrealized gain/loss for the period because of the timing of sales of fund shares and the amount of per share realized and unrealized gains and losses at such time. (i) For the period from the class' inception, December 31, 2002 (Class R), July 31, 2002 (Classes 529A, 529B, and 529C), October 31, 2003 (Class R3), April 1, 2005 (Classes R1, R2, R4, and R5) and May 1, 2006 (Class W) through the stated period end. (n) Not annualized. (r) Certain expenses have been reduced without which performance would have been lower. (s) From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower. (t) Total returns do not include any applicable sales charges. SEE NOTES TO FINANCIAL STATEMENTS NOTES TO FINANCIAL STATEMENTS (1) BUSINESS AND ORGANIZATION MFS Value Fund (the fund) is a series of MFS Series Trust I (the trust). The trust is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open-end management investment company. (2) SIGNIFICANT ACCOUNTING POLICIES GENERAL - The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The fund can invest in foreign securities. Investments in foreign securities are vulnerable to the effects of changes in the relative values of the local currency and the U.S. dollar and to the effects of changes in each country's legal, political, and economic environment. INVESTMENT VALUATIONS - Equity securities, including restricted equity securities, are generally valued at the last sale or official closing price as reported by an independent pricing service on the market or exchange on which they are primarily traded. For securities for which there were no sales reported that day, equity securities are generally valued at the last quoted daily bid quotation as reported by an independent pricing service on the market or exchange on which they are primarily traded. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which approximates market value. Open-end investment companies are generally valued at their net asset value per share. Securities and other assets generally valued on the basis of information from an independent pricing service may also be valued at a broker-dealer bid quotation. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates reported by an independent pricing service. The Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund's investments (including any fair valuation) to the adviser pursuant to valuation policies and procedures approved by the Board. If the adviser determines that reliable market quotations are not readily available, investments are valued at fair value as determined in good faith by the adviser in accordance with such procedures under the oversight of the Board of Trustees. Under the fund's valuation policies and procedures, market quotations are not considered to be readily available for many types of debt instruments. These investments are generally valued at fair value based on information from independent pricing services. The adviser may rely on independent pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund's net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of investments used to determine the fund's net asset value may differ from quoted or published prices for the same investments. In addition, investments may be valued at fair value if the adviser determines that an investment's value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund's net asset value, or after the halting of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. Events that occur on a frequent basis after foreign markets close (such as developments in foreign markets and significant movements in the U.S. markets) and prior to the determination of the fund's net asset value may be deemed to have a material affect on the value of securities traded in foreign markets. Accordingly, the fund's foreign equity securities may often be valued at fair value. REPURCHASE AGREEMENTS - The fund may enter into repurchase agreements with institutions that the fund's investment adviser has determined are creditworthy. Each repurchase agreement is recorded at cost. The fund requires that the securities collateral in a repurchase transaction be transferred to the custodian in a manner sufficient to enable the fund to obtain those securities in the event of a default under the repurchase agreement. The fund monitors, on a daily basis, the value of the collateral to ensure that its value, including accrued interest, is greater than amounts owed to the fund under each such repurchase agreement. The fund, along with other affiliated entities of Massachusetts Financial Services Company (MFS), may utilize a joint trading account for the purpose of entering into one or more repurchase agreements. FOREIGN CURRENCY TRANSLATION - Purchases and sales of foreign investments, income, and expenses are converted into U.S. dollars based upon currency exchange rates prevailing on the respective dates of such transactions. Gains and losses attributable to foreign currency exchange rates on sales of securities are recorded for financial statement purposes as net realized gains and losses on investments. Gains and losses attributable to foreign exchange rate movements on income and expenses are recorded for financial statement purposes as foreign currency transaction gains and losses. That portion of both realized and unrealized gains and losses on investments that results from fluctuations in foreign currency exchange rates is not separately disclosed. SECURITY LOANS - State Street Bank and Trust Company ("State Street"), as lending agent, may loan the securities of the fund to certain qualified institutions (the "Borrowers") approved by the fund. The loans are collateralized at all times by cash and/or U.S. Treasury securities in an amount at least equal to the market value of the securities loaned. State Street provides the fund with indemnification against Borrower default. The fund bears the risk of loss with respect to the investment of cash collateral. On loans collateralized by cash, the cash collateral is invested in a money market fund or short-term securities. A portion of the income generated upon investment of the collateral is remitted to the Borrowers, and the remainder is allocated between the fund and the lending agent. On loans collateralized by U.S. Treasury securities, a fee is received from the Borrower, and is allocated between the fund and the lending agent. Income from securities lending is included in interest income on the Statement of Operations. The dividend and interest income earned on the securities loaned is accounted for in the same manner as other dividend and interest income. SHORT TERM FEES - For purchases made on or after July 1, 2004 and before April 1, 2005, the fund charged a 2% redemption fee (which was retained by the fund on proceeds from Class A, Class B, Class C, and Class I shares redeemed or exchanged within 5 business days following their acquisition (either by purchase or exchange). Effective April 1, 2005, the fund no longer charges a redemption fee. See the fund's prospectus for details. Any redemption fees charged are accounted for as an addition to paid-in-capital. INVESTMENT TRANSACTIONS AND INCOME - Investment transactions are recorded on the trade date. Interest income is recorded on the accrual basis. All premium and discount is amortized or accreted for financial statement purposes in accordance with U.S. generally accepted accounting principles. All discount is accreted for tax reporting purposes as required by federal income tax regulations. Dividends received in cash are recorded on the ex-dividend date. Certain dividends from foreign securities will be recorded when the fund is informed of the dividend if such information is obtained subsequent to the ex- dividend date. Dividend and interest payments received in additional securities are recorded on the ex-dividend or ex-interest date in an amount equal to the value of the security on such date. The fund may receive proceeds from litigation settlements involving its portfolio holdings. Any proceeds received are reflected in realized gain/loss in the Statement of Operations, or in unrealized gain/loss if the security is still held by the fund. FEES PAID INDIRECTLY - The fund's custody fee is reduced according to an arrangement that measures the value of cash deposited with the custodian by the fund. During the year ended August 31, 2006, the fund's custodian fees were reduced by $585,027 under this arrangement. The fund has entered into a commission recapture agreement, under which certain brokers will credit the fund a portion of the commissions generated, to offset certain expenses of the fund. For the year ended August 31, 2006, the fund's custodian expenses were reduced by $7,892 under this agreement. These amounts are shown as a reduction of total expenses on the Statement of Operations. Effective January 1, 2006, the commission recapture agreement was terminated. TAX MATTERS AND DISTRIBUTIONS - The fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable income, including realized capital gains. Accordingly, no provision for federal income tax is required in the financial statements. Foreign taxes, if any, have been accrued by the fund in the accompanying financial statements. Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future. Distributions in excess of net investment income or net realized gains are temporary overdistributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions for financial statement and tax purposes. Book/tax differences primarily relate to wash sale loss deferrals, treating a portion of the proceeds from redemptions as a distribution for tax purposes, and redemptions in-kind. The tax character of distributions declared to shareholders is as follows: 8/31/06 8/31/05 Ordinary income (including any short-term capital gains) $90,625,348 $70,276,146 Long-term capital gain 364,307,851 -- - -------------------------------------------------------------------------------- Total distributions $454,933,199 $70,276,146 The federal tax cost and the tax basis components of distributable earnings were as follows: AS OF 8/31/06 Cost of investments $6,766,419,187 ------------------------------------------------------------ Gross appreciation $1,931,616,823 Gross depreciation (180,557,018) ------------------------------------------------------------ Net unrealized appreciation (depreciation) $1,751,059,805 Undistributed ordinary income 41,676,548 Undistributed long-term capital gain 201,335,214 Other temporary differences (4,200) In June 2006, FASB Interpretation No. 48, Accounting for Uncertainty in Income Taxes (the "Interpretation") was issued, and is effective for fiscal years beginning after December 15, 2006 and is to be applied to all open tax years as of the effective date. This Interpretation prescribes a minimum threshold for financial statement recognition of the benefit of a tax position taken or expected to be taken in a tax return, and requires certain expanded disclosures. Management has recently begun to evaluate the application of the Interpretation to the fund, and has not at this time determined the impact, if any, resulting from the adoption of this Interpretation on the fund's financial statements. MULTIPLE CLASSES OF SHARES OF BENEFICIAL INTEREST - The fund offers multiple classes of shares, which differ in their respective distribution and service fees. All shareholders bear the common expenses of the fund based on daily net assets of each class, without distinction between share classes. Dividends are declared separately for each class. Differences in per share dividend rates are generally due to differences in separate class expenses. Class B and Class 529B shares will convert to Class A and Class 529A shares, respectively, approximately eight years after purchase. (3) TRANSACTIONS WITH AFFILIATES INVESTMENT ADVISER - The fund has an investment advisory agreement with MFS to provide overall investment management and related administrative services and facilities to the fund. The management fee is computed daily and paid monthly at an annual rate of 0.60% of the fund's average daily net assets. The investment adviser has agreed in writing to reduce its management fee to 0.55% of average daily net assets in excess of $7.5 billion. This written agreement may be rescinded only upon consent of the fund's Board of Trustees. This management fee reduction amounted to $237,106, which is shown as a reduction of total expenses in the Statement of Operations. The management fee incurred for the year ended August 31, 2006 was equivalent to an annual effective rate of 0.60% of the fund's average daily net assets. DISTRIBUTOR - MFS Fund Distributors, Inc. (MFD), a wholly-owned subsidiary of MFS, as distributor, received $351,536 and $4,067 for the year ended August 31, 2006, as its portion of the initial sales charge on sales of Class A and Class 529A shares of the fund, respectively. The Board of Trustees has adopted a distribution plan for certain class shares pursuant to Rule 12b-1 of the Investment Company Act of 1940. The fund's distribution plan provides that the fund will pay MFD for services provided by MFD and financial intermediaries in connection with the distribution and servicing of certain share classes. One component of the plan is a distribution fee paid to MFD and another component of the plan is a service fee paid to MFD. MFD may subsequently pay all, or a portion, of the distribution and/or service fees to financial intermediaries. Distribution Fee Plan Table: TOTAL ANNUAL DISTRIBUTION DISTRIBUTION SERVICE DISTRIBUTION EFFECTIVE AND SERVICE FEE RATE FEE RATE PLAN(d) RATE(e) FEE Class A 0.10% 0.25% 0.35% 0.35% $16,424,010 Class B 0.75% 0.25% 1.00% 1.00% 12,008,803 Class C 0.75% 0.25% 1.00% 1.00% 8,699,575 Class W 0.10% -- 0.10% 0.10% 885 Class R 0.25% 0.25% 0.50% 0.50% 525,280 Class R1 0.50% 0.25% 0.75% 0.75% 16,820 Class R2 0.25% 0.25% 0.50% 0.50% 8,184 Class R3 0.25% 0.25% 0.50% 0.50% 87,782 Class R4 -- 0.25% 0.25% 0.25% 36,852 Class 529A 0.25% 0.25% 0.50% 0.35% 11,862 Class 529B 0.75% 0.25% 1.00% 1.00% 8,005 Class 529C 0.75% 0.25% 1.00% 1.00% 11,856 - --------------------------------------------------------------------------------------------------------------------- Total distribution and service fees $37,839,914 (d) In accordance with the distribution plan for certain classes, the fund pays distribution and/or service fees up to these annual percentage rates of each class' average daily net assets. (e) The annual effective rates represent actual fees incurred under the distribution plan for the year ended August 31, 2006 based on each class' average daily net assets. 0.10% of the Class 529A distribution fee is currently being paid by the fund. Payment of the remaining 0.15% the of the Class 529A distribution fee is not yet in effect and will be implemented on such date as the fund's Board of Trustees may determine. Certain Class A, Class C and Class 529C shares are subject to a contingent deferred sales charge in the event of a shareholder redemption within 12 months of purchase. Class B and Class 529B shares are subject to a contingent deferred sales charge in the event of a shareholder redemption within six years of purchase. All contingent deferred sales charges are paid to MFD and during the year ended August 31, 2006, were as follows: AMOUNT Class A $44,814 Class B $1,853,454 Class C $71,267 Class 529B $19 Class 529C $6 The fund has entered into and may from time to time enter into contracts with program managers and other parties which administer the tuition programs through which an investment in the fund's 529 share classes is made. The fund has entered into an agreement with MFD pursuant to which MFD receives an annual fee of up to 0.35% of the average daily net assets attributable to each 529 share class. The fee is based on average daily net assets and is currently established at 0.25% annually of average daily net assets of the fund's 529 share classes. The fee may only be increased with the approval of the Board of Trustees who oversees the fund. The services provided by MFD, or a third party with which MFD contracts, include recordkeeping and tax reporting and account services, as well as services designed to maintain the program's compliance with the Internal Revenue Code and other regulatory requirements. Program manager fees for the year ended August 31, 2006, were as follows: AMOUNT Class 529A $8,474 Class 529B 2,001 Class 529C 2,964 -------------------------------------------------- Total Program Manager Fees $13,439 SHAREHOLDER SERVICING AGENT - MFS Service Center, Inc. (MFSC), a wholly-owned subsidiary of MFS, receives a fee from the fund for its services as shareholder servicing agent calculated as a percentage of the average net assets of the fund as determined periodically under the supervision of the fund's Board of Trustees. For the year ended August 31, 2006, the fee was $7,779,550, which equated to 0.0975% annually of the fund's average daily net assets. MFSC also receives payment from the fund for out-of-pocket and sub-accounting expenses paid by MFSC on behalf of the fund. For the year ended August 31, 2006, these costs amounted to $1,412,511. The fund may also pay shareholder servicing related costs to non-related parties. ADMINISTRATOR - MFS provides certain financial, legal, shareholder communications, compliance, and other administrative services to the fund. Under an administrative services agreement, the fund partially reimburses MFS the costs incurred to provide these services. The fund is charged a fixed amount plus a fee based on calendar year average net assets. From July 1, 2005 through March 31, 2006, the fund's annual fixed amount was $10,000. Effective April 1, 2006, the fund's annual fixed amount is $17,500. The administrative services fee incurred for the year ended August 31, 2006 was equivalent to an annual effective rate of 0.0060% of the fund's average daily net assets. In addition to the administrative services provided by MFS to the fund as described above, MFS is responsible for providing certain retirement plan administration and services with respect to certain shares. These services include various administrative, recordkeeping, and communication/educational services with respect to the retirement plans which invest in these shares, and may be provided directly by MFS or by a third party. MFS may subsequently pay all, or a portion, of the retirement plan administration and services fee to affiliated or unaffiliated third parties. For the year ended August 31, 2006, the fund paid MFS an annual retirement plan administration and services fee up to the following annual percentage rates of each class' average daily net assets: ANNUAL EFFECTIVE TOTAL FEE RATE RATE(g) AMOUNT Class R1 0.45% 0.35% $10,061 Class R2 0.40% 0.25% 6,546 Class R3 0.25% 0.15% 43,891 Class R4 0.15% 0.15% 22,111 Class R5 0.10% 0.10% 45,488 - -------------------------------------------------------------------------------- Total Retirement Plan Administration and Services Fees $128,097 (g) Effective October 1, 2005, MFS has agreed in writing to waive a portion of the retirement plan administration and services fee equal to 0.10% for Class R1 shares, 0.15% for Class R2 shares, and 0.10% for Class R3 shares. This agreement will continue until at least September 30, 2008. For the year ended August 31, 2006, this waiver amounted to $21,340 and is reflected as a reduction of total expenses in the Statement of Operations. TRUSTEES' AND OFFICERS' COMPENSATION - The fund pays compensation to Independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. The fund does not pay compensation directly to Trustees or officers of the fund who are also officers of the investment adviser, all of whom receive remuneration for their services to the fund from MFS. Certain officers and Trustees of the fund are officers or directors of MFS, MFD, and MFSC. The fund has an unfunded, defined benefit plan for certain retired Independent Trustees which resulted in a pension expense of $1,325. This amount is included in Independent trustees' compensation for the year ended August 31, 2006. The deferred liability for retirement benefits payable to certain retired Trustees amounted to $10,557 at August 31, 2006, and is included in payable for independent trustees' compensation. OTHER - This fund and certain other MFS funds (the funds) have entered into a services agreement (the Agreement) which provides for payment of fees by the funds to Tarantino LLC in return for the provision of services of an Independent Chief Compliance Officer (ICCO) for the funds. The ICCO is an officer of the funds and the sole member of Tarantino LLC. The funds can terminate the Agreement with Tarantino LLC at any time under the terms of the Agreement. For the year ended August 31, 2006, the fee paid to Tarantino LLC was $52,613. MFS has agreed to reimburse the fund for a portion of the payments made by the funds to Tarantino LLC in the amount of $43,841, which is shown as a reduction of total expenses in the Statement of Operations. Additionally, MFS has agreed to bear all expenses associated with office space, other administrative support, and supplies provided to the ICCO. (4) PORTFOLIO SECURITIES Purchases and sales of investments, other than U.S. government securities, purchased option transactions, and short-term obligations, aggregated $2,018,887,478 and $2,084,433,780, respectively. (5) SHARES OF BENEFICIAL INTEREST The fund's Declaration of Trust permits the Trustees to issue an unlimited number of full and fractional shares of beneficial interest. Transactions in fund shares were as follows: YEAR ENDED YEAR ENDED 8/31/06 (i) 8/31/05 (i) SHARES AMOUNT SHARES AMOUNT Shares sold Class A 60,803,749 $1,470,033,391 67,622,518 $1,551,532,325 Class B 4,311,711 103,369,845 7,612,220 172,399,903 Class C 5,194,373 124,008,983 6,816,382 154,637,648 Class I 9,361,214 225,782,424 10,315,188 235,628,710 Class W 355,829 8,707,026 -- -- Class R 2,171,753 51,431,346 2,089,842 47,454,343 Class R1 219,186 5,288,225 24,912 587,129 Class R2 192,249 4,708,059 31,006 733,871 Class R3 1,329,770 31,972,342 427,084 9,909,445 Class R4 2,221,181 53,759,704 16,787 398,880 Class R5 2,712,139 63,685,240 2,147 50,000 Class 529A 36,431 876,014 59,455 1,361,336 Class 529B 9,630 228,856 8,352 188,972 Class 529C 8,588 204,251 16,465 377,276 - ------------------------------------------------------------------------------------------------------------ 88,927,803 $2,144,055,706 95,042,358 $2,175,259,838 Shares issued to shareholders in reinvestment of distributions Class A 9,462,744 $221,685,921 1,675,437 $37,750,899 Class B 2,278,450 53,009,523 274,776 6,154,187 Class C 1,259,073 29,257,616 143,635 3,216,693 Class I 2,428,532 57,190,569 445,520 10,091,634 Class W 16 388 -- -- Class R 246,252 5,756,203 28,217 638,219 Class R1 3,439 79,783 10 235 Class R2 1,901 44,284 4 89 Class R3 34,444 803,843 1,089 25,006 Class R4 11,675 276,619 6 145 Class R5 138 3,249 7 180 Class 529A 7,720 180,072 951 21,439 Class 529B 1,606 37,120 110 2,457 Class 529C 2,549 58,871 161 3,597 - ------------------------------------------------------------------------------------------------------------ 15,738,539 $368,384,061 2,569,923 $57,904,780 Shares reacquired Class A (65,973,843) $(1,589,756,950) (46,979,425) $(1,074,415,928) Class B (14,415,374) (346,071,665) (12,281,886) (279,614,054) Class C (7,736,571) (185,371,128) (7,135,699) (161,831,639) Class I (3,495,733) (85,149,119) (1,453,062) (33,305,489) Class W (622) (15,405) -- -- Class R (1,985,641) (48,501,782) (829,372) (19,020,335) Class R1 (60,823) (1,476,315) (637) (15,038) Class R2 (44,464) (1,089,173) (85) (1,994) Class R3 (518,447) (12,427,593) (97,308) (2,238,363) Class R4 (393,300) (9,578,895) -- -- Class R5 (330,497) (8,024,795) -- -- Class 529A (9,716) (232,975) (17,903) (414,122) Class 529B (1,056) (25,650) (1,826) (43,149) Class 529C (4,854) (116,272) (2,618) (59,233) - ------------------------------------------------------------------------------------------------------------ (94,970,941) $(2,287,837,717) (68,799,821) $(1,570,959,344) Net change Class A 4,292,650 $101,962,362 22,318,530 $514,867,296 Class B (7,825,213) (189,692,297) (4,394,890) (101,059,964) Class C (1,283,125) (32,104,529) (175,682) (3,977,298) Class I 8,294,013 197,823,874 9,307,646 212,414,855 Class W 355,223 8,692,009 -- -- Class R 432,364 8,685,767 1,288,687 29,072,227 Class R1 161,802 3,891,693 24,285 572,326 Class R2 149,686 3,663,170 30,925 731,966 Class R3 845,767 20,348,592 330,865 7,696,088 Class R4 1,839,556 44,457,428 16,793 399,025 Class R5 2,381,780 55,663,694 2,154 50,180 Class 529A 34,435 823,111 42,503 968,653 Class 529B 10,180 240,326 6,636 148,280 Class 529C 6,283 146,850 14,008 321,640 - ------------------------------------------------------------------------------------------------------------ 9,695,401 $224,602,050 28,812,460 $662,205,274 (i) For the period from the class' inception, April 1, 2005 (Classes R1, R2, R4, and R5), and May 1, 2006 (Class W) through the stated period end. The fund is one of several mutual funds in which the MFS funds-of-funds may invest. The MFS funds-of-funds do not invest in the underlying MFS funds for the purpose of exercising management or control. At the end of the period, the MFS Moderate Allocation Fund, MFS Growth Allocation Fund, MFS Conservative Allocation Fund, and MFS Aggressive Growth Allocation Fund were the owners of record of approximately 4%, 4%, 1% and 2% respectively, of the value of outstanding voting shares. In addition, the MFS Lifetime Retirement Income Fund, MFS Lifetime 2010 Fund, MFS Lifetime 2020 Fund, MFS Lifetime 2030 Fund, and MFS Lifetime 2040 Fund were all the owners of record of less than 1% of the value of outstanding voting shares. (6) LINE OF CREDIT The fund and other affiliated funds participate in a $1 billion unsecured committed line of credit provided by a syndication of banks under a credit agreement. In addition, the fund and other affiliated funds have established uncommitted borrowing arrangements with certain banks. Borrowings may be made for temporary financing needs. Interest is charged to each fund, based on its borrowings, generally at a rate equal to the Federal Reserve funds rate plus 0.35%. In addition, a commitment fee, based on the average daily, unused portion of the committed line of credit, is allocated among the participating funds at the end of each calendar quarter. For the year ended August 31, 2006, the fund's commitment fee and interest expense were $50,317 and $1,635, respectively, and are included in miscellaneous expense on the Statement of Operations. (7) REDEMPTION IN-KIND On January 3, 2006 and March 20, 2006, the fund paid redemption proceeds by a distribution in-kind of portfolio securities that were valued at $8,016,656 and $15,129,983, respectively. The redeeming shareholders received a pro rata share of each of the securities held by the fund. The distribution of such securities generated realized gains of $2,435,994 and $5,084,784, respectively, for the fund. The fund is not required to recognize gains and losses generated from distributions in-kind. REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM To the Trustees of MFS Series Trust I and Shareholders of MFS Value Fund: We have audited the accompanying statement of assets and liabilities of MFS Value Fund (the Fund) (one of the portfolios comprising MFS Series Trust I), including the portfolio of investments, as of August 31, 2006, and the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended, and the financial highlights for each of the periods indicated therein. These financial statements and financial highlights are the responsibility of the Fund's management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. We were not engaged to perform an audit of the Fund's internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Fund's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements and financial highlights, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of August 31, 2006, by correspondence with the Fund's custodian and brokers or by other appropriate auditing procedures where replies from brokers were not received. We believe that our audits provide a reasonable basis for our opinion. In our opinion, the financial statements and financial highlights referred to above present fairly, in all material respects, the financial position of MFS Value Fund at August 31, 2006, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended, and its financial highlights for each of the periods indicated therein, in conformity with U.S. generally accepted accounting principles. ERNST & YOUNG LLP Boston, Massachusetts October 20, 2006 TRUSTEES AND OFFICERS -- IDENTIFICATION AND BACKGROUND The Trustees and officers of the Trust, as of October 1, 2006, are listed below, together with their principal occupations during the past five years. (Their titles may have varied during that period.) The address of each Trustee and officer is 500 Boylston Street, Boston, Massachusetts 02116. PRINCIPAL OCCUPATIONS DURING POSITION(s) HELD TRUSTEE/OFFICER THE PAST FIVE YEARS & NAME, DATE OF BIRTH WITH FUND SINCE(h) OTHER DIRECTORSHIPS(j) - ------------------- ---------------- --------------- ---------------------------- INTERESTED TRUSTEES Robert J. Manning(k) Trustee February 2004 Massachusetts Financial Services (born 10/20/63) Company, Chief Executive Officer, President, Chief Investment Officer and Director Robert C. Pozen(k) Trustee February 2004 Massachusetts Financial Services (born 8/08/46) Company, Chairman (since February 2004); Secretary of Economic Affairs, The Commonwealth of Massachusetts (January 2002 to December 2002); Fidelity Investments, Vice Chairman (June 2000 to December 2001); Fidelity Management & Research Company (investment adviser), President (March 1997 to July 2001); Bell Canada Enterprises (telecommunications), Director; Medtronic, Inc. (medical technology), Director; Telesat (satellite communications), Director INDEPENDENT TRUSTEES J. Atwood Ives Trustee and Chair February 1992 Private investor; Eastern (born 5/01/36) of Trustees Enterprises (diversified services company), Chairman, Trustee and Chief Executive Officer (until November 2000) Robert E. Butler(n) Trustee January 2006 Consultant - regulatory and (born 11/29/41) compliance matters (since July 2002); PricewaterhouseCoopers LLP (professional services firm), Partner (November 2000 until June 2002) Lawrence H. Cohn, M.D. Trustee August 1993 Brigham and Women's Hospital, (born 3/11/37) Senior Cardiac Surgeon, Chief of Cardiac Surgery (until 2005); Harvard Medical School, Professor of Surgery; Brigham and Women's Hospital Physicians' Organization, Chair (2000 to 2004) David H. Gunning Trustee January 2004 Cleveland-Cliffs Inc. (mining (born 5/30/42) products and service provider), Vice Chairman/Director (since April 2001); Encinitos Ventures (private investment company), Principal (1997 to April 2001); Lincoln Electric Holdings, Inc. (welding equipment manufacturer), Director William R. Gutow Trustee December 1993 Private investor and real estate (born 9/27/41) consultant; Capitol Entertainment Management Company (video franchise), Vice Chairman Michael Hegarty Trustee December 2004 Retired; AXA Financial (financial (born 12/21/44) services and insurance), Vice Chairman and Chief Operating Officer (until May 2001); The Equitable Life Assurance Society (insurance), President and Chief Operating Officer (until May 2001) Lawrence T. Perera Trustee July 1981 Hemenway & Barnes (attorneys), (born 6/23/35) Partner J. Dale Sherratt Trustee August 1993 Insight Resources, Inc. (born 9/23/38) (acquisition planning specialists), President; Wellfleet Investments (investor in health care companies), Managing General Partner (since 1993); Cambridge Nutraceuticals (professional nutritional products), Chief Executive Officer (until May 2001) Laurie J. Thomsen Trustee March 2005 Private investor; Prism Venture (born 8/05/57) Partners (venture capital), Co- founder and General Partner (until June 2004); St. Paul Travelers Companies (commercial property liability insurance), Director Robert W. Uek Trustee January 2006 Retired (since 1999); (born 5/18/41) PricewaterhouseCoopers LLP (professional services firm), Partner (until 1999); Consultant to investment company industry (since 2000); TT International Funds (mutual fund complex), Trustee (2000 until 2005); Hillview Investment Trust II Funds (mutual fund complex), Trustee (2000 until 2005) OFFICERS Maria F. Dwyer(k) President November 2005 Massachusetts Financial Services (born 12/01/58) Company, Executive Vice President and Chief Regulatory Officer (since March 2004); Fidelity Management & Research Company, Vice President (prior to March 2004); Fidelity Group of Funds, President and Treasurer (prior to March 2004) Tracy Atkinson(k) Treasurer September 2005 Massachusetts Financial Services (born 12/30/64) Company, Senior Vice President (since September 2004); PricewaterhouseCoopers LLP, Partner (prior to September 2004) Christopher R. Bohane(k) Assistant Secretary July 2005 Massachusetts Financial Services (born 1/18/74) and Assistant Clerk Company, Vice President and Senior Counsel (since April 2003); Kirkpatrick & Lockhart LLP (law firm), Associate (prior to April 2003) Ethan D. Corey(k) Assistant Secretary July 2005 Massachusetts Financial Services (born 11/21/63) and Assistant Clerk Company, Special Counsel (since December 2004); Dechert LLP (law firm), Counsel (prior to December 2004) David L. DiLorenzo(k) Assistant Treasurer July 2005 Massachusetts Financial Services (born 8/10/68) Company, Vice President (since June 2005); JP Morgan Investor Services, Vice President (prior to June 2005) Timothy M. Fagan(k) Assistant Secretary September 2005 Massachusetts Financial Services (born 7/10/68) and Assistant Clerk Company, Vice President and Senior Counsel (since September 2005); John Hancock Advisers, LLC, Vice President and Chief Compliance Officer (September 2004 to August 2005), Senior Attorney (prior to September 2004); John Hancock Group of Funds, Vice President and Chief Compliance Officer (September 2004 to December 2004) Mark D. Fischer(k) Assistant Treasurer July 2005 Massachusetts Financial Services (born 10/27/70) Company, Vice President (since May 2005); JP Morgan Investment Management Company, Vice President (prior to May 2005) Brian E. Langenfeld(k) Assistant Secretary June 2006 Massachusetts Financial Services (born 3/07/73) and Assistant Clerk Company, Assistant Vice President and Counsel (since May 2006); John Hancock Advisers, LLC, Assistant Vice President and Counsel (May 2005 to April 2006); John Hancock Advisers, LLC, Attorney and Assistant Secretary (prior to May 2005) Ellen Moynihan(k) Assistant Treasurer April 1997 Massachusetts Financial Services (born 11/13/57) Company, Senior Vice President Susan S. Newton(k) Assistant Secretary May 2005 Massachusetts Financial Services (born 3/07/50) and Assistant Clerk Company, Senior Vice President and Associate General Counsel (since April 2005); John Hancock Advisers, LLC, Senior Vice President, Secretary and Chief Legal Officer (prior to April 2005); John Hancock Group of Funds, Senior Vice President, Secretary and Chief Legal Officer (prior to April 2005) Susan A. Pereira(k) Assistant Secretary July 2005 Massachusetts Financial Services (born 11/05/70) and Assistant Clerk Company, Vice President and Senior Counsel (since June 2004); Bingham McCutchen LLP (law firm), Associate (prior to June 2004) Mark N. Polebaum(k) Secretary and Clerk January 2006 Massachusetts Financial Services (born 5/01/52) Company, Executive Vice President, General Counsel and Secretary (since January 2006); Wilmer Cutler Pickering Hale and Dorr LLP (law firm), Partner (prior to January 2006) Frank L. Tarantino Independent Chief June 2004 Tarantino LLC (provider of (born 3/07/44) Compliance Officer compliance services), Principal (since June 2004); CRA Business Strategies Group (consulting services), Executive Vice President (April 2003 to June 2004); David L. Babson & Co. (investment adviser), Managing Director, Chief Administrative Officer and Director (prior to March 2003) James O. Yost(k) Assistant Treasurer September 1990 Massachusetts Financial Services (born 6/12/60) Company, Senior Vice President - ------------ (h) Date first appointed to serve as Trustee/officer of an MFS fund. Each Trustee has served continuously since appointment unless indicated otherwise. (j) Directorships or trusteeships of companies required to report to the Securities and Exchange Commission (i.e., "public companies"). (k) "Interested person" of the Trust within the meaning of the Investment Company Act of 1940 (referred to as the 1940 Act), which is the principal federal law governing investment companies like the fund, as a result of position with MFS. The address of MFS is 500 Boylston Street, Boston, Massachusetts 02116. (n) In 2004 and 2005, Mr. Butler provided consulting services to the independent compliance consultant retained by MFS pursuant to its settlement with the SEC concerning market timing and related matters. The terms of that settlement required that compensation and expenses related to the independent compliance consultant be borne exclusively by MFS and, therefore, MFS paid Mr. Butler for the services he rendered to the independent compliance consultant. In 2004 and 2005, MFS paid Mr. Butler a total of $351,119.29. The Trust held a shareholders' meeting in 2005 to elect Trustees, and will hold a shareholders' meeting at least once every five years thereafter, to elect Trustees. Each Trustee (except Mr. Butler and Mr. Uek) has been elected by shareholders and each Trustee and officer holds office until his or her successor is chosen and qualified or until his or her earlier death, resignation, retirement or removal. Messrs. Butler, Sherratt and Uek and Ms. Thomsen are members of the Trust's Audit Committee. Each of the Trust's Trustees and officers holds comparable positions with certain other funds of which MFS or a subsidiary is the investment adviser or distributor, and, in the case of the officers, with certain affiliates of MFS. As of January 1, 2006, the Trustees served as board members of 98 funds within the MFS Family of Funds. The Statement of Additional Information contains further information about the Trustees and is available without charge upon request by calling 1-800-225-2606. - ------------------------------------------------------------------------------------------------------------- INVESTMENT ADVISER CUSTODIAN Massachusetts Financial Services Company State Street Bank and Trust Company 500 Boylston Street, Boston, MA 02116-3741 225 Franklin Street, Boston, MA 02110 DISTRIBUTOR INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM MFS Fund Distributors, Inc. Ernst & Young LLP 500 Boylston Street, Boston, MA 02116-3741 200 Clarendon Street, Boston, MA 02116 PORTFOLIO MANAGERS Nevin Chitkara Steven Gorham BOARD REVIEW OF INVESTMENT ADVISORY AGREEMENT The Investment Company Act of 1940 requires that both the full Board of Trustees and a majority of the non-interested ("independent") Trustees, voting separately, annually approve the continuation of the Fund's investment advisory agreement with MFS. The Trustees consider matters bearing on the Fund and its advisory arrangements at their meetings throughout the year, including a review of performance data at each regular meeting. In addition, the independent Trustees met several times over the course of three months beginning in May and ending in July, 2006 ("contract review meetings") for the specific purpose of considering whether to approve the continuation of the investment advisory agreement for the Fund and the other investment companies that the Board oversees (the "MFS Funds"). The independent Trustees were assisted in their evaluation of the Fund's investment advisory agreement by independent legal counsel, from whom they received separate legal advice and with whom they met separately from MFS during various contract review meetings. The independent Trustees were also assisted in this process by the MFS Funds' Independent Chief Compliance Officer, a full-time senior officer appointed by and reporting to the independent Trustees. In connection with their deliberations regarding the continuation of the investment advisory agreement, the Trustees, including the independent Trustees, considered such information and factors as they believed, in light of the legal advice furnished to them and their own business judgment, to be relevant. The investment advisory agreement for the Fund was considered separately, although the Trustees also took into account the common interests of all MFS Funds in their review. As described below, the Trustees considered the nature, quality, and extent of the various investment advisory, administrative, and shareholder services performed by MFS under the existing investment advisory agreement and other arrangements with the Fund. In connection with their contract review meetings, the Trustees received and relied upon materials which included, among other items: (i) information provided by Lipper Inc. on the investment performance of the Fund for various time periods ended December 31, 2005 and the investment performance of a group of funds with substantially similar investment classifications/objectives (the "Lipper performance universe"), as well as the investment performance of a group of funds identified by objective criteria suggested by MFS ("MFS peer funds"), (ii) information provided by Lipper Inc. on the Fund's advisory fees and other expenses and the advisory fees and other expenses of comparable funds identified by Lipper (the "Lipper expense group"), as well as the advisory fees and other expenses of MFS peer funds, (iii) information provided by MFS on the advisory fees of comparable portfolios of other clients of MFS, including institutional separate accounts and other clients, (iv) information as to whether and to what extent applicable expense waivers, reimbursements or fee "breakpoints" are observed for the Fund, (v) information regarding MFS' financial results and financial condition, including MFS' and certain of its affiliates' estimated profitability from services performed for the Fund and the MFS Funds as a whole, (vi) MFS' views regarding the outlook for the mutual fund industry and the strategic business plans of MFS, (vii) descriptions of various functions performed by MFS for the Funds, such as compliance monitoring and portfolio trading practices, and (viii) information regarding the overall organization of MFS, including information about MFS' senior management and other personnel providing investment advisory, administrative and other services to the Fund and the other MFS Funds. The comparative performance, fee and expense information prepared and provided by Lipper Inc. was not independently verified and the independent Trustees did not independently verify any information provided to them by MFS. The Trustees' conclusion as to the continuation of the investment advisory agreement was based on a comprehensive consideration of all information provided to the Trustees and not the result of any single factor. Some of the factors that figured particularly in the Trustees' deliberations are described below, although individual Trustees may have evaluated the information presented differently from one another, giving different weights to various factors. It is also important to recognize that the fee arrangements for the Fund and other MFS Funds are the result of years of review and discussion between the independent Trustees and MFS, that certain aspects of such arrangements may receive greater scrutiny in some years than others, and that the Trustees' conclusions may be based, in part, on their consideration of these same arrangements during the course of the year and in prior years. Based on information provided by Lipper Inc. and MFS, the Trustees reviewed the Fund's total return investment performance as well as the performance of peer groups of funds over various time periods. The Trustees placed particular emphasis on the total return performance of the Fund's Class A shares in comparison to the performance of funds in its Lipper performance universe over the three-year period ended December 31, 2005, which the Trustees believed was a long enough period to reflect differing market conditions. The Fund's performance was in the 2nd quintile relative to the other funds in the universe for this three-year period (the 1st quintile being the best performers and the 5th quintile being the worst performers). The total return performance of the Fund's Class A shares was in the 2nd quintile for each of the one and five-year periods ended December 31, 2005 relative to the Lipper performance universe. Because of the passage of time, these performance results may differ from the performance results for more recent periods, including those shown elsewhere in this report. In the course of their deliberations, the Trustees took into account information provided by MFS in connection with the contract review meetings, as well as during investment review meetings conducted with portfolio management personnel during the course of the year regarding the Fund's performance. After reviewing these and related factors, the Trustees concluded, within the context of their overall conclusions regarding the investment advisory agreement, that they were satisfied with MFS' responses and efforts relating to investment performance. In assessing the reasonableness of the Fund's advisory fee, the Trustees considered, among other information, the Fund's advisory fee and the total expense ratio of the Fund's Class A shares as a percentage of average net assets and the advisory fee and total expense ratios of peer groups of funds based on information provided by Lipper Inc. and MFS. The Trustees considered that MFS has agreed in writing to waive a portion of its advisory fee on assets over $7.5 billion, which may not be changed without the Trustees' approval. The Trustees also considered that, according to the Lipper data, the Fund's effective advisory fee rate was approximately at the Lipper expense group median, and the Fund's total expense ratio was higher than the Lipper expense group median. The Trustees also considered the advisory fees charged by MFS to institutional accounts. In comparing these fees, the Trustees considered information provided by MFS as to the generally broader scope of services provided by MFS to the Fund in comparison to institutional accounts, the higher demands placed on MFS' investment personnel and trading infrastructure as a result of the daily cash in-flows and out-flows of the Fund, and the impact on MFS and expenses associated with the more extensive regulatory regime to which the Fund is subject in comparison to institutional accounts. The Trustees also considered whether the Fund is likely to benefit from any economies of scale in the management of the Fund in the event of growth in assets of the Fund. They noted that the Fund's advisory fee rate schedule is currently subject to the breakpoint described above. The Trustees concluded that the existing breakpoint was sufficient to allow the Fund to benefit from economies of scale as its assets grow. The Trustees also considered information prepared by MFS relating to MFS' costs and profits with respect to the Fund, the MFS Funds considered as a group, and other investment companies and accounts advised by MFS, as well as MFS' methodologies used to determine and allocate its costs to the MFS Funds, the Fund and other accounts and products for purposes of estimating profitability. After reviewing these and other factors described herein, the Trustees concluded, within the context of their overall conclusions regarding the investment advisory agreement, that the advisory fees charged to the Fund represent reasonable compensation in light of the services being provided by MFS to the Fund. In addition, the Trustees considered MFS' resources and related efforts to continue to retain, attract and motivate capable personnel to serve the Fund. The Trustees also considered current and developing conditions in the financial services industry, including the entry into the industry of large and well-capitalized companies which are spending, and appear to be prepared to continue to spend, substantial sums to engage personnel and to provide services to competing investment companies. In this regard, the Trustees also considered the financial resources of MFS and its ultimate parent, Sun Life Financial Inc. The Trustees also considered the advantages and possible disadvantages to the Fund of having an adviser which also serves other investment companies as well as other accounts. The Trustees also considered the nature, quality, cost, and extent of administrative, transfer agency, and distribution services provided to the Fund by MFS and its affiliates under agreements and plans other than the investment advisory agreement, including any 12b-1 fees the Fund pays to MFS Fund Distributors, Inc., an affiliate of MFS. The Trustees also considered the nature, extent and quality of certain other services MFS performs or arranges for on the Fund's behalf, which may include securities lending programs, directed expense payment programs, class action recovery programs, and MFS' interaction with third-party service providers, principally custodians and sub-custodians. The Trustees concluded that the various non-advisory services provided by MFS and its affiliates on behalf of the Funds were satisfactory. The Trustees also considered benefits to MFS from the use of the Fund's portfolio brokerage commissions, if applicable, to pay for investment research (excluding third-party research for which MFS pays directly), and various other factors. Additionally, the Trustees considered so-called "fall-out benefits" to MFS such as reputational value derived from serving as investment manager to the Fund. Based on their evaluation of factors that they deemed to be material, including those factors described above, the Board of Trustees, including a majority of the independent Trustees, concluded that the Fund's investment advisory agreement with MFS should be continued for an additional one-year period, commencing August 1, 2006. A discussion regarding the Board's most recent review and renewal of the Fund's investment advisory agreement will be available on or before November 1, 2006 by clicking on the fund's name under "Select a fund" on the MFS Web site (mfs.com). PROXY VOTING POLICIES AND INFORMATION A general description of the MFS funds' proxy voting policies and procedures is available without charge, upon request, by calling 1-800-225-2606, by visiting the Proxy Voting section of mfs.com or by visiting the SEC's Web site at http://www.sec.gov. Information regarding how the fund voted proxies relating to portfolio securities during the most recent twelve-month period ended June 30 is available without charge by visiting the Proxy Voting section of mfs.com or by visiting the SEC's Web site at http://www.sec.gov. QUARTERLY PORTFOLIO DISCLOSURE The fund will file a complete schedule of portfolio holdings with the Securities and Exchange Commission (the Commission) for the first and third quarters of each fiscal year on Form N-Q. The fund's Form N-Q may be reviewed and copied at the: Public Reference Room Securities and Exchange Commission 100 F Street, NE, Room 1580 Washington, D.C. 20549 Information on the operation of the Public Reference Room may be obtained by calling the Commission at 1-202-551-5850. The fund's Form N-Q is available on the EDGAR database on the Commission's Internet Web site at http://www.sec.gov, and copies of this information may be obtained, upon payment of a duplicating fee, by electronic request at the following e-mail address: publicinfo@sec.gov or by writing the Public Reference Section at the above address. A shareholder can also obtain the quarterly portfolio holdings report at mfs.com. FEDERAL TAX INFORMATION (unaudited) The fund will notify shareholders of amounts for use in preparing 2006 income tax forms in January 2007. The following information is provided pursuant to provisions of the Internal Revenue Code. The fund designates the maximum amount allowable as qualified dividend income eligible for the 15% tax rate. The fund designates $388,547,450 as capital gain dividends paid during the fiscal year. For corporate shareholders, 100.00% of the ordinary income dividends paid during the fiscal year qualify for the corporate dividends received deduction. MFS(R) PRIVACY NOTICE Privacy is a concern for every investor today. At MFS Investment Management(R) and the MFS funds, we take this concern very seriously. We want you to understand our policies about the investment products and services that we offer, and how we protect the nonpublic personal information of investors who have a direct relationship with us and our wholly owned subsidiaries. Throughout our business relationship, you provide us with personal information. We maintain information and records about you, your investments, and the services you use. Examples of the nonpublic personal information we maintain include o data from investment applications and other forms o share balances and transactional history with us, our affiliates, or others o facts from a consumer reporting agency We do not disclose any nonpublic personal information about our customers or former customers to anyone, except as permitted by law. We may share nonpublic personal information with third parties or certain of our affiliates in connection with servicing your account or processing your transactions. We may share information with companies or financial institutions that perform marketing services on our behalf or with other financial institutions with which we have joint marketing arrangements, subject to any legal requirements. Authorization to access your nonpublic personal information is limited to appropriate personnel who provide products, services, or information to you. We maintain physical, electronic, and procedural safeguards to help protect the personal information we collect about you. If you have any questions about the MFS privacy policy, please call 1-800-225-2606 any business day between 8 a.m. and 8 p.m. Eastern time. Note: If you own MFS products or receive MFS services in the name of a third party such as a bank or broker-dealer, their privacy policy may apply to you instead of ours. CONTACT US WEB SITE MAILING ADDRESS mfs.com MFS Service Center, Inc. P.O. Box 55824 MFS TALK Boston, MA 1-800-637-8255 02205-5824 24 hours a day OVERNIGHT MAIL ACCOUNT SERVICE AND MFS Service Center, Inc. LITERATURE 500 Boylston Street Boston, MA 02116-3741 SHAREHOLDERS 1-800-225-2606 8 a.m. to 8 p.m. ET INVESTMENT PROFESSIONALS 1-800-343-2829 8 a.m. to 8 p.m. ET RETIREMENT PLAN SERVICES 1-800-637-1255 8 a.m. to 8 p.m. ET - ------------------------------------------------------------------------------- Go paperless with eDELIVERY: Arrange to have MFS send prospectuses, reports, and proxies directly to your e-mail inbox. You'll get timely information and less clutter in your mailbox (not to mention help your fund save printing and postage costs). SIGN UP: If your account is registered with us, simply go to mfs.com, log in to your account via MFS Access, and select the eDelivery sign up options. If you own your MFS fund shares through a financial institution or a retirement plan, MFS TALK, MFS Access, and eDelivery may not be available to you. - ------------------------------------------------------------------------------- M F S(R) INVESTMENT MANAGEMENT M F S(R) INVESTMENT MANAGEMENT [graphic omitted] ANNUAL REPORT KEEPING YOU INFORMED MFS wants to ensure that you are consistently updated about your investments with us. This shareholder report will not only show how your investment performed during the time period, but will also provide you with informative commentary from the portfolio management team. They will offer an overview of market conditions and will also discuss the specific factors that may have enhanced or detracted from your investment's performance. MFS(R) NEW DISCOVERY FUND LETTER FROM THE CEO 1 - ------------------------------------------------------------------ PORTFOLIO COMPOSITION 2 - ------------------------------------------------------------------ MANAGEMENT REVIEW 3 - ------------------------------------------------------------------ PERFORMANCE SUMMARY 5 - ------------------------------------------------------------------ EXPENSE TABLE 8 - ------------------------------------------------------------------ PORTFOLIO OF INVESTMENTS 10 - ------------------------------------------------------------------ STATEMENT OF ASSETS AND LIABILITIES 15 - ------------------------------------------------------------------ STATEMENT OF OPERATIONS 18 - ------------------------------------------------------------------ STATEMENTS OF CHANGES IN NET ASSETS 20 - ------------------------------------------------------------------ FINANCIAL HIGHLIGHTS 21 - ------------------------------------------------------------------ NOTES TO FINANCIAL STATEMENTS 30 - ------------------------------------------------------------------ REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM 41 - ------------------------------------------------------------------ TRUSTEES AND OFFICERS 42 - ------------------------------------------------------------------ BOARD REVIEW OF INVESTMENT ADVISORY AGREEMENT 48 - ------------------------------------------------------------------ PROXY VOTING POLICIES AND INFORMATION 53 - ------------------------------------------------------------------ QUARTERLY PORTFOLIO DISCLOSURE 53 - ------------------------------------------------------------------ FEDERAL TAX INFORMATION 53 - ------------------------------------------------------------------ MFS(R) PRIVACY NOTICE 54 - ------------------------------------------------------------------ CONTACT INFORMATION BACK COVER - ------------------------------------------------------------------ Fund objective: Seeks to provide capital appreciation. THE REPORT IS PREPARED FOR THE GENERAL INFORMATION OF SHAREHOLDERS. IT IS AUTHORIZED FOR DISTRIBUTION TO PROSPECTIVE INVESTORS ONLY WHEN PRECEDED OR ACCOMPANIED BY A CURRENT PROSPECTUS. - ------------------------------------------------------------------------------- NOT FDIC INSURED o MAY LOSE VALUE o NO BANK OR CREDIT UNION GUARANTEE o NOT A DEPOSIT o NOT INSURED BY ANY FEDERAL GOVERNMENT AGENCY OR NCUA/NCUSIF - ------------------------------------------------------------------------------- 8/31/06 NDF-ANN LETTER FROM THE CEO [Photo of Robert J. Manning] Dear Shareholders: The story is as old as the tortoise and the hare, but we believe it is still relevant today -- "slow and steady" is the way to go when it comes to investing. While financial markets will naturally ebb and flow over time, investors who remain committed to a long-term investment strategy are more likely to achieve their goals than those who consistently chase short-term performance. The first half of 2006 brought a high degree of fluctuation in markets around the globe as varying economic factors pulled markets in opposite directions. The global economy, for example, continued to grow at its fastest pace in three decades -- spurred by increased international trade, good job growth, and wage increases. At the same time, central banks around the world raised interest rates in sync in a collaborative attempt to curb inflation. While this was a positive development in some regions, in other cases, economic and market gains were tempered. What does all of this mean to you as an investor? If you're focused on the long term, these global developments become part of a longer cycle instead of one-time events that can have a significant impact on your portfolio. At MFS(R), our investment management process -- honed over 80 years -- combines a unique teamwork approach with an unwavering focus on helping you realize your long-term financial goals. We believe in a three-pronged investment strategy: o ALLOCATE holdings across the major asset classes -- including stocks, bonds, and cash. o DIVERSIFY within each class to take advantage of different market segments and investing styles. o REBALANCE assets regularly to maintain a desired asset allocation. Of course, these strategies cannot guarantee a profit or protect against a loss. Investing and planning for the long term requires diligence and patience, two traits that in our experience are essential to capitalizing on the many opportunities the financial markets can offer -- through both up and down economic cycles. Respectfully, /s/ Robert J. Manning Robert J. Manning Chief Executive Officer and Chief Investment Officer MFS Investment Management(R) October 13, 2006 The opinions expressed in this letter are subject to change, may not be relied upon for investment advice, and no forecasts can be guaranteed. PORTFOLIO COMPOSITION PORTFOLIO STRUCTURE Common Stocks 99.5% Cash & Other Net Assets 0.5% TOP TEN HOLDINGS NICE Systems Ltd., ADR 3.1% ------------------------------------------------ Millipore Corp. 2.5% ------------------------------------------------ Aspect Medical Systems, Inc. 2.1% ------------------------------------------------ Thoratec Corp. 2.0% ------------------------------------------------ Conceptus, Inc. 1.9% ------------------------------------------------ MSC Industrial Direct Co., Inc., "A" 1.8% ------------------------------------------------ Medicis Pharmaceutical Corp., "A" 1.8% ------------------------------------------------ Nuance Communications, Inc. 1.8% ------------------------------------------------ Cyberonics, Inc. 1.8% ------------------------------------------------ Texas Roadhouse, Inc., "A" 1.7% ------------------------------------------------ EQUITY SECTORS Health Care 24.2% ------------------------------------------------ Technology 18.9% ------------------------------------------------ Special Products & Services 12.5% ------------------------------------------------ Leisure 11.5% ------------------------------------------------ Retailing 10.4% ------------------------------------------------ Financial Services 5.5% ------------------------------------------------ Industrial Goods & Services 5.3% ------------------------------------------------ Energy 5.1% ------------------------------------------------ Basic Materials 2.3% ------------------------------------------------ Consumer Staples 2.1% ------------------------------------------------ Utilities & Communications 1.7% ------------------------------------------------ Percentages are based on net assets as of 8/31/06. The portfolio is actively managed and current holdings may be different. MANAGEMENT REVIEW SUMMARY OF RESULTS For the twelve months ended August 31, 2006, Class A shares of the MFS New Discovery Fund provided a total return of 0.65%, at net asset value. This compares with a return of 6.00% for the fund's benchmark, the Russell 2000 Growth Index. DETRACTORS FROM PERFORMANCE Stock selection and, to a lesser extent, our overweighted position in the weak-performing retailing sector detracted from relative performance. Our holdings in lifestyle merchandising company Urban Outfitters (not an index constituent) was among the fund's top detractors over the period. Urban Outfitters' decreasing margins as a result of inventory overhang and additional markdowns to clear seasonal inventories, along with falling same-store sales, weighed on its stock performance. Our overweighted positions in the leisure sector also held back results as the sector underperformed the benchmark. In the leisure sector, entertainment software games and accessories maker Take-Two Interactive Software* and video game maker Activision (not an index constituent) hurt relative returns. The fund's overweighting in the health care sector was unfavorable to relative returns as the sector underperformed the benchmark. Holdings in medical device makers Cyberonics and AtriCure (not an index constituent), medical equipment company Aspect Medical Systems, disposable medical products maker Merit Medical Systems*, and specialty drug distributor Allion Healthcare* held back relative results. Cyberonics lowered revenue guidance for the first quarter of 2007 and delayed profitability expectations. Additionally, investigations into Cyberonics' stock option practices, which caused a delay in the filing of the company's annual report, and uncertainty whether NASDAQ would delist its stocks led to the company's poor results. Shares of Aspect Medical Systems declined on concerns about the decreasing sales growth of sensors. Weak stock selection in the special products and services sector and a combination of stock selection and underweighted positions in the strong- performing energy and basic materials sectors hindered relative returns. No individual stocks within these sectors were among the top detractors for the period. Elsewhere, semiconductor materials and devices maker Cree and digital map information provider NAVTEQ Corp, neither of which are index constituents, were among the fund's top detractors. CONTRIBUTORS TO PERFORMANCE Although underweighting the weak-performing autos and housing sector bolstered relative performance, no individual securities in this sector were among the fund's top contributors. Several stocks in the health care and technology sectors generated positive returns relative to the benchmark. In health care, permanent birth control device maker Conceptus and animal health products distributor MWI Veterinary Supply aided relative returns. Conceptus was boosted by strong revenue from the company's Essure product (a permanent sterilization device for women). The company also benefited from the announcement earlier this year that health care services provider Cigna would start to cover the Essure procedure. In addition, our holdings in Medical device maker Advanced Medical Optics and diagnostic device maker IDEXX Laboratories, neither of which are index constituents, also contributed to relative returns. In technology, NAND flash memory storage products maker SanDisk* (not an index constituent) and information technology automation software products provider Opsware aided results. In our opinion, SanDisk has been able to drive costs down at an equal pace while benefiting from the elasticity of demand driven by lower priced innovative consumer products. More recently, stock performance was driven by the M-Systems acquisition, which extends the life of SanDisk's intellectual property and the capacity upgrades for Apple's iPod Nano and SanDisk's own Sansa, which drove tightness in the NAND flash memory storage products market. Opsware's stock price increased as the company exceeded its revenue guidance and, in February 2006, announced that Cisco Systems will distribute and integrate Opsware's Network Automation product set under the Cisco brand. Elsewhere, infrastructure services provider for electric power and gas industries Quanta Services was among the fund's top contributors. Respectfully, Thomas H. Wetherald Portfolio Manager *Security was not held in the portfolio at period end. The views expressed in this report are those of the portfolio manager only through the end of the period of the report as stated on the cover and do not necessarily reflect the views of MFS or any other person in the MFS organization. These views are subject to change at any time based on market and other conditions, and MFS disclaims any responsibility to update such views. These views may not be relied upon as investment advice or an indication of trading intent on behalf of any MFS portfolio. References to specific securities are not recommendations of such securities, and may not be representative of any MFS portfolio's current or future investments. PERFORMANCE SUMMARY THROUGH 8/31/06 The following chart illustrates the historical performance of the fund's Class A shares in comparison to its benchmark. Performance results include the deduction of the maximum applicable sales charge and reflect the percentage change in net asset value, including reinvestment of dividends and capital gains distributions. The performance of other share classes will be greater than or less than that of the class depicted below. Benchmark comparisons are unmanaged; do not reflect sales charges, commissions or expenses; and cannot be invested in directly. (See Notes to Performance Summary.) PERFORMANCE DATA SHOWN REPRESENTS PAST PERFORMANCE AND IS NO GUARANTEE OF FUTURE RESULTS. INVESTMENT RETURN AND PRINCIPAL VALUE FLUCTUATE SO YOUR SHARES, WHEN SOLD, MAY BE WORTH MORE OR LESS THAN THE ORIGINAL COST; CURRENT PERFORMANCE MAY BE LOWER OR HIGHER THAN QUOTED. FOR MOST RECENT MONTH-END PERFORMANCE, PLEASE VISIT MFS.COM. (FOR THE MOST RECENT MONTH-END PERFORMANCE FOR CLASS I SHARES CALL 1-800-343-2829.) THE PERFORMANCE SHOWN DOES NOT REFLECT THE DEDUCTION OF TAXES, IF ANY, THAT A SHAREHOLDER WOULD PAY ON FUND DISTRIBUTIONS OR THE REDEMPTION OF FUND SHARES. GROWTH OF A HYPOTHETICAL $10,000 INVESTMENT (For the period from the commencement of the fund's investment operations, January 2, 1997, through the stated period end.) MFS New Discovery Fund Russell 2000 -- Class A Growth Index 1/97 $ 9,425 $10,000 8/97 12,318 11,394 8/98 11,718 8,396 8/99 16,222 12,033 8/00 28,653 16,734 8/01 22,242 10,887 8/02 16,493 8,054 8/03 20,042 10,865 8/04 18,611 11,232 8/05 23,178 13,873 8/06 23,329 14,705 TOTAL RETURNS THROUGH 8/31/06 AVERAGE ANNUAL WITHOUT SALES CHARGE Share class Class inception date 1-yr 5-yr Life (t) - ------------------------------------------------------------------------------ A 1/02/97 0.65% 0.96% 9.84% - ------------------------------------------------------------------------------ B 11/03/97 0.00% 0.31% 9.19% - ------------------------------------------------------------------------------ C 11/03/97 0.00% 0.30% 9.21% - ------------------------------------------------------------------------------ I 1/02/97 0.98% 1.31% 10.22% - ------------------------------------------------------------------------------ R 12/31/02 0.48% 0.85% 9.78% - ------------------------------------------------------------------------------ R1 4/01/05 -0.12% 0.72% 9.70% - ------------------------------------------------------------------------------ R2 4/01/05 0.25% 0.81% 9.75% - ------------------------------------------------------------------------------ R3 10/31/03 0.36% 0.76% 9.72% - ------------------------------------------------------------------------------ R4 4/01/05 0.59% 0.94% 9.82% - ------------------------------------------------------------------------------ R5 4/01/05 0.89% 1.02% 9.87% - ------------------------------------------------------------------------------ 529A 7/31/02 0.36% 0.76% 9.72% - ------------------------------------------------------------------------------ 529B 7/31/02 -0.25% 0.23% 9.43% - ------------------------------------------------------------------------------ 529C 7/31/02 -0.25% 0.21% 9.41% - ------------------------------------------------------------------------------ AVERAGE ANNUAL Comparative benchmark - ------------------------------------------------------------------------------ Russell 2000 Growth Index (f) 6.00% 6.20% 4.07% - ------------------------------------------------------------------------------ AVERAGE ANNUAL WITH SALES CHARGE Share class - ------------------------------------------------------------------------------ A -5.13% -0.23% 9.17% With Initial Sales Charge (5.75%) - ------------------------------------------------------------------------------ B -4.00% -0.09% 9.19% With CDSC (Declining over six years from 4% to 0%) (x) - ------------------------------------------------------------------------------ C -1.00% 0.30% 9.21% With CDSC (1% for 12 months) (x) - ------------------------------------------------------------------------------ 529A -5.41% -0.43% 9.05% With Initial Sales Charge (5.75%) - ------------------------------------------------------------------------------ 529B -4.24% -0.16% 9.43% With CDSC (Declining over six years from 4% to 0%) (x) - ------------------------------------------------------------------------------ 529C -1.25% 0.21% 9.41% With CDSC (1% for 12 months) (x) - ------------------------------------------------------------------------------ Class I, R, R1, R2, R3, R4, and R5 shares do not have a sales charge. Please see Notes to Performance Summary for more details. CDSC - Contingent Deferred Sales Charge. (f) Source: FactSet Research Systems Inc. (t) For the period from the commencement of the fund's investment operations, January 2, 1997, through the stated period end. (x) Assuming redemption at the end of the applicable period. INDEX DEFINITION Russell 2000 Growth Index - constructed to provide a comprehensive barometer for growth securities in the small-cap segment of the U.S. equity universe. Companies in this index generally have higher price-to-book ratios and higher forecasted growth values. It is not possible to invest directly in an index. NOTES TO PERFORMANCE SUMMARY Class R shares are available only to existing Class R shareholders. Class I shares are only available to certain eligible investors, and Class R1, R2, R3, R4, and R5 shares are only available to certain retirement plans. Class 529 shares are only available in conjunction with qualified tuition programs, such as the MFS 529 Savings Plan. There also is an additional annual fee, which is detailed in the program description, on qualified tuition programs. If this fee was reflected, the performance for Class 529 shares would have been lower. This annual fee is waived for Oregon residents and for those accounts with assets of $25,000 or more. Performance for share classes offered after Class A shares includes the performance of the fund's Class A shares for periods prior to their offering. This blended class performance has been adjusted to take into account differences in sales loads, if any, applicable to these share classes, but has not been adjusted to take into account differences in class specific operating expenses (such as Rule 12b-1 fees). Compared to performance these share classes would have experienced had they been offered for the entire period, the use of blended performance generally results in higher performance for share classes with higher operating expenses than the share class to which it is blended, and lower performance for share classes with lower operating expenses than the share class to which it is blended. Performance results reflect any applicable expense subsidies and waivers in effect during the periods shown. Without such subsidies and waivers the fund's performance results would be less favorable. Please see the prospectus and financial statements for complete details. From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower. EXPENSE TABLE Fund expenses borne by the shareholders during the period, March 1, 2006 through August 31, 2006. As a shareholder of the fund, you incur two types of costs: (1) transaction costs, including sales charges (loads) on certain purchase or redemption payments and redemption fees on certain exchanges and redemptions, and (2) ongoing costs, including management fees; distribution and service (12b-1) fees; and other fund expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in the fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period March 1, 2006 through August 31, 2006. ACTUAL EXPENSES The first line for each share class in the following table provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number in the first line under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. HYPOTHETICAL EXAMPLE FOR COMPARISON PURPOSES The second line for each share class in the following table provides information about hypothetical account values and hypothetical expenses based on the fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs, such as sales charges (loads) or redemption fees. Therefore, the second line for each share class in the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher. - -------------------------------------------------------------------------------- Expenses Paid During Annualized Beginning Ending Period(p) Share Expense Account Value Account Value 3/01/06- Class Ratio 3/01/06 8/31/06 8/31/06 - -------------------------------------------------------------------------------- Actual 1.44% $1,000.00 $924.80 $6.99 A ------------------------------------------------------------------------ Hypothetical (h) 1.44% $1,000.00 $1,017.95 $7.32 - ------------------------------------------------------------------------------- Actual 2.08% $1,000.00 $922.00 $10.08 B ------------------------------------------------------------------------ Hypothetical (h) 2.08% $1,000.00 $1,014.72 $10.56 - ------------------------------------------------------------------------------- Actual 2.07% $1,000.00 $922.10 $10.03 C ------------------------------------------------------------------------ Hypothetical (h) 2.07% $1,000.00 $1,014.77 $10.51 - ------------------------------------------------------------------------------- Actual 1.07% $1,000.00 $926.30 $5.20 I ------------------------------------------------------------------------ Hypothetical (h) 1.07% $1,000.00 $1,019.81 $5.45 - ------------------------------------------------------------------------------- Actual 1.57% $1,000.00 $923.90 $7.61 R ------------------------------------------------------------------------ Hypothetical (h) 1.57% $1,000.00 $1,017.29 $7.98 - ------------------------------------------------------------------------------- Actual 2.17% $1,000.00 $921.30 $10.51 R1 ------------------------------------------------------------------------ Hypothetical (h) 2.17% $1,000.00 $1,014.27 $11.02 - ------------------------------------------------------------------------------- Actual 1.84% $1,000.00 $922.70 $8.92 R2 ------------------------------------------------------------------------ Hypothetical (h) 1.84% $1,000.00 $1,015.93 $9.35 - ------------------------------------------------------------------------------- Actual 1.73% $1,000.00 $923.50 $8.39 R3 ------------------------------------------------------------------------ Hypothetical (h) 1.73% $1,000.00 $1,016.48 $8.79 - ------------------------------------------------------------------------------- Actual 1.50% $1,000.00 $924.20 $7.28 R4 ------------------------------------------------------------------------ Hypothetical (h) 1.50% $1,000.00 $1,017.64 $7.63 - ------------------------------------------------------------------------------- Actual 1.20% $1,000.00 $926.00 $5.83 R5 ------------------------------------------------------------------------ Hypothetical (h) 1.20% $1,000.00 $1,019.16 $6.11 - ------------------------------------------------------------------------------- Actual 1.68% $1,000.00 $923.00 $8.14 529A ------------------------------------------------------------------------ Hypothetical (h) 1.68% $1,000.00 $1,016.74 $8.54 - ------------------------------------------------------------------------------- Actual 2.33% $1,000.00 $920.20 $11.28 529B ------------------------------------------------------------------------ Hypothetical (h) 2.33% $1,000.00 $1,013.46 $11.82 - ------------------------------------------------------------------------------- Actual 2.33% $1,000.00 $920.30 $11.28 529C ------------------------------------------------------------------------ Hypothetical (h) 2.33% $1,000.00 $1,013.46 $11.82 - ------------------------------------------------------------------------------- (h) 5% class return per year before expenses. (p) Expenses paid is equal to each class' annualized expense ratio, as shown above, multiplied by the average account value over the period, multiplied by the number of days in the period, divided by the number of days in the year. Expenses paid do not include any applicable sales charges (loads) or redemption fees. If these transaction costs had been included, your costs would have been higher. PORTFOLIO OF INVESTMENTS 8/31/06 The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes. Common Stocks - 99.5% - ----------------------------------------------------------------------------------------------------------- ISSUER SHARES/PAR VALUE ($) - ----------------------------------------------------------------------------------------------------------- Alcoholic Beverages - 0.2% - ----------------------------------------------------------------------------------------------------------- Castle Brands, Inc. (n) 226,690 $ 1,394,143 - ----------------------------------------------------------------------------------------------------------- Apparel Manufacturers - 1.6% - ----------------------------------------------------------------------------------------------------------- Carter's, Inc. (l)(n) 441,890 $ 10,207,659 Volcom, Inc. (n) 89,755 2,099,369 ------------ $ 12,307,028 - ----------------------------------------------------------------------------------------------------------- Biotechnology - 4.6% - ----------------------------------------------------------------------------------------------------------- Bruker BioSciences Corp. (n) 269,890 $ 1,905,423 CV Therapeutics, Inc. (l)(n) 514,630 5,789,587 Gen-Probe, Inc. (n) 191,440 9,305,898 Millipore Corp. (n) 303,320 19,467,078 ------------ $ 36,467,986 - ----------------------------------------------------------------------------------------------------------- Brokerage & Asset Managers - 0.7% - ----------------------------------------------------------------------------------------------------------- Cowen Group, Inc. (l)(n) 104,480 $ 1,471,078 Thomas Weisel Partners Group LLC (l)(n) 278,480 4,046,314 ------------ $ 5,517,392 - ----------------------------------------------------------------------------------------------------------- Business Services - 7.7% - ----------------------------------------------------------------------------------------------------------- Bright Horizons Family Solutions, Inc. (l)(n) 219,843 $ 8,771,736 Corporate Executive Board Co. 113,680 9,962,915 CoStar Group, Inc. (l)(n) 281,030 11,319,888 Equinix, Inc. (l)(n) 145,530 8,392,715 LoopNet, Inc. (n) 262,480 3,425,364 TALX Corp. (l) 366,830 9,060,701 Ultimate Software Group, Inc. (l)(n) 420,840 9,510,984 ------------ $ 60,444,303 - ----------------------------------------------------------------------------------------------------------- Chemicals - 1.1% - ----------------------------------------------------------------------------------------------------------- Nalco Holding Co. (n) 486,680 $ 9,057,115 - ----------------------------------------------------------------------------------------------------------- Computer Software - 5.5% - ----------------------------------------------------------------------------------------------------------- NAVTEQ Corp. (l)(n) 274,020 $ 7,277,971 Open Solutions, Inc. (l)(n) 293,030 8,656,106 Opsware, Inc. (l)(n) 1,790,510 12,623,096 TIBCO Software, Inc. (n) 1,661,830 13,061,984 Witness Systems, Inc. (n) 124,999 2,031,234 ------------ $ 43,650,391 - ----------------------------------------------------------------------------------------------------------- Computer Software - Systems - 0.6% - ----------------------------------------------------------------------------------------------------------- MICROS Systems, Inc. (n) 101,802 $ 4,872,244 - ----------------------------------------------------------------------------------------------------------- Consumer Goods & Services - 6.0% - ----------------------------------------------------------------------------------------------------------- Central Garden & Pet Co. (l)(n) 216,375 $ 9,483,716 DTS, Inc. (l)(n) 110,940 2,039,077 ITT Educational Services, Inc. (l)(n) 178,610 11,804,335 Monster Worldwide, Inc. (n) 114,720 4,673,693 Move, Inc. (n) 787,172 3,605,248 PlanetOut, Inc. (l)(n) 449,010 1,917,273 Strayer Education, Inc. (l) 129,450 13,644,030 ------------ $ 47,167,372 - ----------------------------------------------------------------------------------------------------------- Electrical Equipment - 1.8% - ----------------------------------------------------------------------------------------------------------- MSC Industrial Direct Co., Inc., "A" 365,280 $ 14,377,421 - ----------------------------------------------------------------------------------------------------------- Electronics - 6.3% - ----------------------------------------------------------------------------------------------------------- ARM Holdings PLC 6,009,580 $ 13,594,082 Cree, Inc. (l)(n) 508,220 9,463,056 Entegris, Inc. (l)(n) 985,876 10,706,613 Kronos, Inc. (l)(n) 265,660 8,107,943 Volterra Semiconductor Corp. (l)(n) 538,380 8,118,770 ------------ $ 49,990,464 - ----------------------------------------------------------------------------------------------------------- Energy - Independent - 2.0% - ----------------------------------------------------------------------------------------------------------- EXCO Resources, Inc. (l)(n) 684,710 $ 9,147,726 Forest Oil Corp. (l)(n) 192,210 6,510,153 ------------ $ 15,657,879 - ----------------------------------------------------------------------------------------------------------- Engineering - Construction - 2.4% - ----------------------------------------------------------------------------------------------------------- InfraSource Services, Inc. (l)(n) 520,550 $ 9,000,310 Quanta Services, Inc. (l)(n) 544,430 9,652,744 ------------ $ 18,653,054 - ----------------------------------------------------------------------------------------------------------- Food & Beverages - 0.7% - ----------------------------------------------------------------------------------------------------------- Diamond Foods, Inc. (l) 351,926 $ 5,254,255 - ----------------------------------------------------------------------------------------------------------- Gaming & Lodging - 3.2% - ----------------------------------------------------------------------------------------------------------- Four Seasons Hotels, Inc. 73,900 $ 4,663,829 Shuffle Master, Inc. (l)(n) 344,400 9,584,652 WMS Industries, Inc. (l)(n) 416,220 11,154,696 ------------ $ 25,403,177 - ----------------------------------------------------------------------------------------------------------- General Merchandise - 1.0% - ----------------------------------------------------------------------------------------------------------- Stage Stores, Inc. (l) 295,160 $ 7,780,418 - ----------------------------------------------------------------------------------------------------------- Internet - 1.6% - ----------------------------------------------------------------------------------------------------------- CNET Networks, Inc. (l)(n) 1,008,590 $ 9,511,004 Vocus, Inc. (l)(n) 204,479 2,735,929 ------------ $ 12,246,933 - ----------------------------------------------------------------------------------------------------------- Leisure & Toys - 2.9% - ----------------------------------------------------------------------------------------------------------- Activision, Inc. (n) 855,780 $ 11,039,562 THQ, Inc. (l)(n) 463,934 11,969,497 ------------ $ 23,009,059 - ----------------------------------------------------------------------------------------------------------- Machinery & Tools - 1.1% - ----------------------------------------------------------------------------------------------------------- Ritchie Bros. Auctioneers, Inc. 179,570 $ 8,789,952 - ----------------------------------------------------------------------------------------------------------- Medical & Health Technology & Services - 5.3% - ----------------------------------------------------------------------------------------------------------- AMICAS, Inc. (l)(n) 494,640 $ 1,602,634 Healthcare Services Group, Inc. (l) 409,230 9,285,429 IDEXX Laboratories, Inc. (n) 105,865 9,740,639 MWI Veterinary Supply, Inc. (n) 312,700 10,853,817 VCA Antech, Inc. (n) 130,490 4,621,956 WebMD Health Corp. (l)(n) 162,840 6,018,566 ------------ $ 42,123,041 - ----------------------------------------------------------------------------------------------------------- Medical Equipment - 10.9% - ----------------------------------------------------------------------------------------------------------- Advanced Medical Optics, Inc. (l)(n) 188,790 $ 9,090,238 Aspect Medical Systems, Inc. (l)(n) 868,560 16,780,579 AtriCure, Inc. (l)(n) 349,390 2,078,870 Conceptus, Inc. (l)(n) 877,610 15,138,773 Cyberonics, Inc. (l)(n) 856,690 13,946,913 Immucor, Inc. (n) 271,705 5,643,313 Thoratec Corp. (l)(n) 1,075,200 15,762,432 Ventana Medical Systems, Inc. (l)(n) 165,820 7,733,845 ------------ $ 86,174,963 - ----------------------------------------------------------------------------------------------------------- Metals & Mining - 0.5% - ----------------------------------------------------------------------------------------------------------- Inmet Mining Corp. 96,580 $ 4,065,514 - ----------------------------------------------------------------------------------------------------------- Network & Telecom - 3.1% - ----------------------------------------------------------------------------------------------------------- NICE Systems Ltd., ADR (n) 993,854 $ 24,806,596 - ----------------------------------------------------------------------------------------------------------- Oil Services - 3.1% - ----------------------------------------------------------------------------------------------------------- Atwood Oceanics, Inc. (l)(n) 123,630 $ 5,316,090 Dresser-Rand Group, Inc. (l)(n) 510,370 10,437,067 Natural Gas Services Group, Inc. (l)(n) 287,160 4,080,544 Universal Compression Holdings, Inc. (n) 81,380 4,429,513 ------------ $ 24,263,214 - ----------------------------------------------------------------------------------------------------------- Other Banks & Diversified Financials - 4.8% - ----------------------------------------------------------------------------------------------------------- Commerce Bancorp, Inc. (l) 228,380 $ 7,607,338 Investors Financial Services Corp. (l) 266,400 12,350,304 New York Community Bancorp, Inc. (l) 565,840 9,285,434 Placer Sierra Bancshares 52,300 1,242,648 Signature Bank (n) 229,160 7,527,906 ------------ $ 38,013,630 - ----------------------------------------------------------------------------------------------------------- Personal Computers & Peripherals - 1.8% - ----------------------------------------------------------------------------------------------------------- Nuance Communications, Inc. (l)(n) 1,792,609 $ 14,071,981 - ----------------------------------------------------------------------------------------------------------- Pharmaceuticals - 3.4% - ----------------------------------------------------------------------------------------------------------- Auxilium Pharmaceuticals, Inc. (l)(n) 494,892 $ 4,290,714 Endo Pharmaceuticals Holdings, Inc. (n) 246,190 8,131,656 Medicis Pharmaceutical Corp., "A" (l) 481,670 14,108,114 ------------ $ 26,530,484 - ----------------------------------------------------------------------------------------------------------- Printing & Publishing - 0.8% - ----------------------------------------------------------------------------------------------------------- Morningstar, Inc. (l)(n) 100,446 $ 3,843,064 Playboy Enterprises, Inc., "B" (l)(n) 297,960 2,836,579 ----------- $ 6,679,643 - ----------------------------------------------------------------------------------------------------------- Restaurants - 4.6% - ----------------------------------------------------------------------------------------------------------- Chipotle Mexican Grill, Inc., "A" (l)(n) 123,600 $ 6,098,424 Peet's Coffee & Tea, Inc. (l)(n) 150,790 3,801,416 Red Robin Gourmet Burgers, Inc. (l)(n) 306,080 12,919,637 Texas Roadhouse, Inc., "A" (l)(n) 1,134,440 13,704,035 ------------ $ 36,523,512 - ----------------------------------------------------------------------------------------------------------- Specialty Chemicals - 0.7% - ----------------------------------------------------------------------------------------------------------- NuCO2, Inc. (l)(n) 197,720 $ 5,387,870 - ----------------------------------------------------------------------------------------------------------- Specialty Stores - 7.8% - ----------------------------------------------------------------------------------------------------------- A.C. Moore Arts & Crafts, Inc. (l)(n) 351,780 $ 6,254,648 Aeropostale, Inc. (l)(n) 244,150 6,201,410 CarMax, Inc. (l)(n) 147,380 5,554,752 Celebrate Express, Inc. (n) 201,880 2,634,534 Citi Trends, Inc. (n) 268,650 8,443,670 Dick's Sporting Goods, Inc. (l)(n) 187,680 7,756,814 Hibbett Sporting Goods, Inc. (l)(n) 356,510 8,745,190 Monro Muffler Brake, Inc. (l) 180,400 5,814,292 Urban Outfitters, Inc. (l)(n) 652,390 10,235,999 ------------ $ 61,641,309 - ----------------------------------------------------------------------------------------------------------- Telecommunications - Wireless - 0.4% - ----------------------------------------------------------------------------------------------------------- Global Signal, Inc., REIT 73,300 $ 3,518,400 - ----------------------------------------------------------------------------------------------------------- Telephone Services - 1.3% - ----------------------------------------------------------------------------------------------------------- Level 3 Communications, Inc. (l)(n) 2,353,570 $ 10,426,315 - ----------------------------------------------------------------------------------------------------------- TOTAL COMMON STOCKS (IDENTIFIED COST, $778,807,747) $786,267,058 - ----------------------------------------------------------------------------------------------------------- Short-Term Obligations - 0.5% - ----------------------------------------------------------------------------------------------------------- General Electric Co., 5.27%, due 9/01/06, at Amortized Cost and Value (y) $ 4,335,000 $ 4,335,000 - ----------------------------------------------------------------------------------------------------------- Collateral for Securities Loaned - 23.7% - ----------------------------------------------------------------------------------------------------------- Navigator Securities Lending Prime Portfolio, at Cost and Net Asset Value 186,967,549 $186,967,549 - ----------------------------------------------------------------------------------------------------------- TOTAL INVESTMENTS (IDENTIFIED COST, $970,110,296) $977,569,607 - ----------------------------------------------------------------------------------------------------------- Other Assets, Less Liabilities - (23.7)% (187,329,910) - ----------------------------------------------------------------------------------------------------------- NET ASSETS - 100.0% $790,239,697 - ----------------------------------------------------------------------------------------------------------- (l) All or a portion of this security is on loan. (n) Non-income producing security. (y) The rate shown represents an annualized yield at time of purchase. The following abbreviations are used in this report and are defined: ADR American Depository Receipt REIT Real Estate Investment Trust SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENT OF ASSETS AND LIABILITIES At 8/31/06 This statement represents your fund's balance sheet, which details the assets and liabilities comprising the total value of the fund. ASSETS - ----------------------------------------------------------------------------------------------------- Investments, at value, including $182,043,142 of securities on loan (identified cost, $970,110,296) $977,569,607 Cash 745 Receivable for investments sold 10,700,999 Receivable for fund shares sold 519,959 Interest and dividends receivable 152,527 Other assets 4,904 - ----------------------------------------------------------------------------------------------------- Total assets $988,948,741 - ----------------------------------------------------------------------------------------------------- LIABILITIES - ----------------------------------------------------------------------------------------------------- Payable for investments purchased $7,825,882 Payable for fund shares reacquired 3,550,990 Collateral for securities loaned, at value 186,967,549 Payable to affiliates Management fee 34,702 Shareholder servicing costs 129,933 Distribution and service fees 18,323 Administrative services fee 806 Program manager fees 30 Retirement plan administration and services fees 404 Payable for independent trustees' compensation 12,499 Accrued expenses and other liabilities 167,926 - ----------------------------------------------------------------------------------------------------- Total liabilities $198,709,044 - ----------------------------------------------------------------------------------------------------- Net assets $790,239,697 - ----------------------------------------------------------------------------------------------------- NET ASSETS CONSIST OF - ----------------------------------------------------------------------------------------------------- Paid-in capital $957,885,933 Unrealized appreciation (depreciation) on investments and translation of assets and liabilities in foreign currencies 7,459,309 Accumulated net realized gain (loss) on investments and foreign currency transactions (175,093,812) Accumulated net investment loss (11,733) - ----------------------------------------------------------------------------------------------------- Net assets $790,239,697 - ----------------------------------------------------------------------------------------------------- Shares of beneficial interest outstanding 46,888,681 - ----------------------------------------------------------------------------------------------------- Statement of Assets and Liabilities - continued Class A shares - ----------------------------------------------------------------------------------------------------- Net assets $409,470,982 Shares outstanding 24,147,078 - ----------------------------------------------------------------------------------------------------- Net asset value per share $16.96 - ----------------------------------------------------------------------------------------------------- Offering price per share (100/94.25Xnet asset value per share) $17.99 - ----------------------------------------------------------------------------------------------------- Class B shares - ----------------------------------------------------------------------------------------------------- Net assets $132,519,134 Shares outstanding 8,182,708 - ----------------------------------------------------------------------------------------------------- Net asset value and offering price per share $16.20 - ----------------------------------------------------------------------------------------------------- Class C shares - ----------------------------------------------------------------------------------------------------- Net assets $47,292,643 Shares outstanding 2,916,249 - ----------------------------------------------------------------------------------------------------- Net asset value and offering price per share $16.22 - ----------------------------------------------------------------------------------------------------- Class I shares - ----------------------------------------------------------------------------------------------------- Net assets $119,052,634 Shares outstanding 6,811,113 - ----------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $17.48 - ----------------------------------------------------------------------------------------------------- Class R shares - ----------------------------------------------------------------------------------------------------- Net assets $11,691,438 Shares outstanding 693,039 - ----------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $16.87 - ----------------------------------------------------------------------------------------------------- Class R1 shares - ----------------------------------------------------------------------------------------------------- Net assets $856,977 Shares outstanding 53,033 - ----------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $16.16 - ----------------------------------------------------------------------------------------------------- Class R2 shares - ----------------------------------------------------------------------------------------------------- Net assets $361,822 Shares outstanding 22,295 - ----------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $16.23 - ----------------------------------------------------------------------------------------------------- Class R3 shares - ----------------------------------------------------------------------------------------------------- Net assets $4,417,241 Shares outstanding 263,238 - ----------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $16.78 - ----------------------------------------------------------------------------------------------------- Statement of Assets and Liabilities - continued Class R4 shares - ----------------------------------------------------------------------------------------------------- Net assets $2,404,350 Shares outstanding 141,929 - ----------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $16.94 - ----------------------------------------------------------------------------------------------------- Class R5 shares - -------------------------------------------------------------------------------- Net assets $59,998,603 Shares outstanding 3,527,025 - ----------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $17.01 - ----------------------------------------------------------------------------------------------------- Class 529A shares - ----------------------------------------------------------------------------------------------------- Net assets $1,630,024 Shares outstanding 97,070 - ----------------------------------------------------------------------------------------------------- Net asset value per share $16.79 - ----------------------------------------------------------------------------------------------------- Offering price per share (100/94.25Xnet asset value per share) $17.81 - ----------------------------------------------------------------------------------------------------- Class 529B shares - ----------------------------------------------------------------------------------------------------- Net assets $211,387 Shares outstanding 13,183 - ----------------------------------------------------------------------------------------------------- Net asset value and offering price per share $16.03 - ----------------------------------------------------------------------------------------------------- Class 529C shares - ----------------------------------------------------------------------------------------------------- Net assets $332,462 Shares outstanding 20,721 - ----------------------------------------------------------------------------------------------------- Net asset value and offering price per share $16.04 - ----------------------------------------------------------------------------------------------------- On sales of $50,000 or more, the offering prices of Class A and Class 529A shares are reduced. A contingent deferred sales charge may be imposed on redemptions of Class A, Class B, Class C, Class 529B, and Class 529C shares. SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENT OF OPERATIONS Year ended 8/31/06 This statement describes how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations. NET INVESTMENT LOSS - ------------------------------------------------------------------------------------------------------- Income Dividends $2,382,226 Income on securities loaned 568,750 Interest 164,664 Foreign taxes withheld (25,633) - ------------------------------------------------------------------------------------------------------- Total investment income $3,090,007 - ------------------------------------------------------------------------------------------------------- Expenses Management fee $8,192,481 Distribution and service fees 4,158,494 Program manager fees 5,475 Shareholder servicing costs 2,026,342 Administrative services fee 127,806 Retirement plan administration and services fees 54,902 Independent trustees' compensation 22,936 Custodian fee 271,943 Shareholder communications 129,851 Auditing fees 44,872 Legal fees 18,525 Miscellaneous 281,505 - ------------------------------------------------------------------------------------------------------- Total expenses $15,335,132 - ------------------------------------------------------------------------------------------------------- Fees paid indirectly (101,239) Reduction of expenses by investment adviser (918,888) - ------------------------------------------------------------------------------------------------------- Net expenses $14,315,005 - ------------------------------------------------------------------------------------------------------- Net investment loss $(11,224,998) - ------------------------------------------------------------------------------------------------------- Statement of Operations - continued REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS - ------------------------------------------------------------------------------------------------------- Realized gain (loss) (identified cost basis) Investment transactions $95,716,193 Foreign currency transactions 2,232 - ------------------------------------------------------------------------------------------------------- Net realized gain (loss) on investments and foreign currency transactions $95,718,425 - ------------------------------------------------------------------------------------------------------- Change in unrealized appreciation (depreciation) Investments $(76,087,080) Translation of assets and liabilities in foreign currencies (176) - ------------------------------------------------------------------------------------------------------- Net unrealized gain (loss) on investments and foreign currency translation $(76,087,256) - ------------------------------------------------------------------------------------------------------- Net realized and unrealized gain (loss) on investments and foreign currency $19,631,169 - ------------------------------------------------------------------------------------------------------- Change in net assets from operations $8,406,171 - ------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENTS OF CHANGES IN NET ASSETS These statements describe the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions. YEARS ENDED 8/31 ----------------------------------------- 2006 2005 CHANGE IN NET ASSETS FROM OPERATIONS - ----------------------------------------------------------------------------------------------------------- Net investment loss $(11,224,998) $(13,154,686) Net realized gain (loss) on investments and foreign currency transactions 95,718,425 148,915,854 Net unrealized gain (loss) on investments and foreign currency translation (76,087,256) 113,723,737 - ----------------------------------------------------------------------------------------------------------- Change in net assets from operations $8,406,171 $249,484,905 - ----------------------------------------------------------------------------------------------------------- Change in net assets from fund share transactions $(212,974,517) $(489,681,518) - ----------------------------------------------------------------------------------------------------------- Redemption fees $17,161 $12,723 - ----------------------------------------------------------------------------------------------------------- Total change in net assets $(204,551,185) $(240,183,890) - ----------------------------------------------------------------------------------------------------------- NET ASSETS - ----------------------------------------------------------------------------------------------------------- At beginning of period 994,790,882 1,234,974,772 At end of period (including accumulated net investment loss of $11,733 and $12,736, respectively) $790,239,697 $994,790,882 - ----------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Statements FINANCIAL HIGHLIGHTS The financial highlights table is intended to help you understand the fund's financial performance for the past 5 years (or life of a particular share class, if shorter). Certain information reflects financial results for a single fund share. The total returns in the table represent the rate by which an investor would have earned (or lost) on an investment in the fund share class (assuming reinvestment of all distributions) held for the entire period. This information has been audited by the fund's independent registered public accounting firm, whose report, together with the fund's financial statements, are included in this report. CLASS A YEARS ENDED 8/31 ----------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $16.85 $13.53 $14.57 $11.99 $16.17 - -------------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.20) $(0.16) $(0.18) $(0.13) $(0.18) Net realized and unrealized gain (loss) on investments and foreign currency 0.31 3.48 (0.86) 2.71 (4.00) - -------------------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.11 $3.32 $(1.04) $2.58 $(4.18) - -------------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - -------------------------------------------------------------------------------------------------------------------------------- From net realized gain on investments and foreign currency transactions $-- $-- $-- $-- $(0.00)(w) - -------------------------------------------------------------------------------------------------------------------------------- Redemption fees added to paid-in capital (d) $0.00(w) $0.00(w) $0.00(w) $-- $-- - -------------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $16.96 $16.85 $13.53 $14.57 $11.99 - -------------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 0.65 24.54 (7.14)(b) 21.52 (25.85) - -------------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.57 1.57 1.51 1.58 1.58 Expenses after expense reductions (f) 1.47 1.47 1.51 N/A N/A Net investment loss (1.12) (1.05) (1.20) (1.11) (1.21) Portfolio turnover 99 112 122 104 102 Net assets at end of period (000 Omitted) $409,471 $603,396 $824,708 $1,004,473 $822,193 - -------------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS B YEARS ENDED 8/31 ----------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $16.20 $13.09 $14.19 $11.75 $15.95 - -------------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.30) $(0.25) $(0.27) $(0.21) $(0.28) Net realized and unrealized gain (loss) on investments and foreign currency 0.30 3.36 (0.83) 2.65 (3.92) - -------------------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.00 $3.11 $(1.10) $2.44 $(4.20) - -------------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - -------------------------------------------------------------------------------------------------------------------------------- From net realized gain on investments and foreign currency transactions $-- $-- $-- $-- $(0.00)(w) - -------------------------------------------------------------------------------------------------------------------------------- Redemption fees added to paid-in capital (d) $0.00(w) $0.00(w) $0.00(w) $-- $-- - -------------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $16.20 $16.20 $13.09 $14.19 $11.75 - -------------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 0.00 23.76 (7.75)(b) 20.77 (26.33) - -------------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.22 2.22 2.15 2.23 2.23 Expenses after expense reductions (f) 2.12 2.12 2.15 N/A N/A Net investment loss (1.77) (1.70) (1.84) (1.76) (1.86) Portfolio turnover 99 112 122 104 102 Net assets at end of period (000 Omitted) $132,519 $203,722 $231,653 $271,580 $232,792 - -------------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS C YEARS ENDED 8/31 ----------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $16.22 $13.10 $14.21 $11.77 $15.97 - -------------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.30) $(0.25) $(0.27) $(0.21) $(0.28) Net realized and unrealized gain (loss) on investments and foreign currency 0.30 3.37 (0.84) 2.65 (3.92) - -------------------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.00 $3.12 $(1.11) $2.44 $(4.20) - -------------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - -------------------------------------------------------------------------------------------------------------------------------- From net realized gain on investments and foreign currency transactions $-- $-- $-- $-- $(0.00)(w) - -------------------------------------------------------------------------------------------------------------------------------- Redemption fees added to paid-in capital (d) $0.00(w) $0.00(w) $0.00(w) $-- $-- - -------------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $16.22 $16.22 $13.10 $14.21 $11.77 - -------------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 0.00 23.82 (7.81)(b) 20.73 (26.34) - -------------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.22 2.22 2.15 2.23 2.23 Expenses after expense reductions (f) 2.12 2.12 2.15 N/A N/A Net investment loss (1.77) (1.70) (1.84) (1.76) (1.86) Portfolio turnover 99 112 122 104 102 Net assets at end of period (000 Omitted) $47,293 $58,454 $67,102 $84,391 $87,271 - -------------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS I YEARS ENDED 8/31 ---------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $17.31 $13.85 $14.86 $12.19 $16.37 - -------------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.14) $(0.11) $(0.13) $(0.09) $(0.13) Net realized and unrealized gain (loss) on investments and foreign currency 0.31 3.57 (0.88) 2.76 (4.05) - -------------------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.17 $3.46 $(1.01) $2.67 $(4.18) - -------------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - -------------------------------------------------------------------------------------------------------------------------------- From net realized gain on investments and foreign currency transactions $-- $-- $-- $-- $(0.00)(w) - -------------------------------------------------------------------------------------------------------------------------------- Redemption fees added to paid-in capital (d) $0.00(w) $0.00(w) $0.00(w) $-- $-- - -------------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $17.48 $17.31 $13.85 $14.86 $12.19 - -------------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 0.98 24.98 (6.80)(b) 21.90 (25.58) - -------------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.22 1.23 1.16 1.23 1.23 Expenses after expense reductions (f) 1.12 1.13 1.16 N/A N/A Net investment loss (0.77) (0.70) (0.84) (0.75) (0.86) Portfolio turnover 99 112 122 104 102 Net assets at end of period (000 Omitted) $119,053 $107,842 $103,031 $90,872 $47,641 - -------------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R YEARS ENDED 8/31 ----------------------------------------------------------- 2006 2005 2004 2003(i) Net asset value, beginning of period $16.79 $13.50 $14.57 $11.38 - --------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - --------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.22) $(0.18) $(0.20) $(0.11) Net realized and unrealized gain (loss) on investments and foreign currency 0.30 3.47 (0.87) 3.30 - --------------------------------------------------------------------------------------------------------------- Total from investment operations $0.08 $3.29 $(1.07) $3.19 - --------------------------------------------------------------------------------------------------------------- Redemption fees added to paid-in capital (d) $0.00(w) $0.00(w) $0.00(w) $-- - --------------------------------------------------------------------------------------------------------------- Net asset value, end of period $16.87 $16.79 $13.50 $14.57 - --------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 0.48 24.37 (7.34)(b) 28.03(n) - --------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - --------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.72 1.73 1.66 1.78(a) Expenses after expense reductions (f) 1.62 1.63 1.66 N/A Net investment loss (1.27) (1.17) (1.32) (1.26)(a) Portfolio turnover 99 112 122 104 Net assets at end of period (000 Omitted) $11,691 $16,926 $7,262 $1,824 - --------------------------------------------------------------------------------------------------------------- CLASS R1 YEARS ENDED 8/31 --------------------- 2006 2005(i) Net asset value, beginning of period $16.18 $14.50 - --------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - --------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.31) $(0.10) Net realized and unrealized gain (loss) on investments and foreign currency 0.29 1.78 - --------------------------------------------------------------------------------------------------------------- Total from investment operations $(0.02) $1.68 - --------------------------------------------------------------------------------------------------------------- Redemption fees added to paid-in capital (d) $0.00(w) $0.00(w) - --------------------------------------------------------------------------------------------------------------- Net asset value, end of period $16.16 $16.18 - --------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) (0.12) 11.59(n) - --------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - --------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.43 2.43(a) Expenses after expense reductions (f) 2.22 2.33(a) Net investment loss (1.86) (1.69)(a) Portfolio turnover 99 112 Net assets at end of period (000 Omitted) $857 $206 - --------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R2 YEARS ENDED 8/31 --------------------- 2006 2005(i) Net asset value, beginning of period $16.19 $14.50 - -------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.25) $(0.08) Net realized and unrealized gain (loss) on investments and foreign currency 0.29 1.77 - -------------------------------------------------------------------------------------------------- Total from investment operations $0.04 $1.69 - -------------------------------------------------------------------------------------------------- Redemption fees added to paid-in capital (d) $0.00(w) $0.00(w) - -------------------------------------------------------------------------------------------------- Net asset value, end of period $16.23 $16.19 - -------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 0.25 11.66(n) - -------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.12 2.12(a) Expenses after expense reductions (f) 1.88 2.02(a) Net investment loss (1.52) (1.02)(a) Portfolio turnover 99 112 Net assets at end of period (000 Omitted) $362 $135 - -------------------------------------------------------------------------------------------------- CLASS R3 YEARS ENDED 8/31 ----------------------------------- 2006 2005 2004(i) Net asset value, beginning of period $16.72 $13.47 $15.35 - --------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - --------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.24) $(0.22) $(0.11) Net realized and unrealized gain (loss) on investments and foreign currency 0.30 3.47 (1.77) - --------------------------------------------------------------------------------------------------- Total from investment operations $0.06 $3.25 $(1.88) - --------------------------------------------------------------------------------------------------- Redemption fees added to paid-in capital (d) $0.00(w) $0.00(w) $0.00(w) - --------------------------------------------------------------------------------------------------- Net asset value, end of period $16.78 $16.72 13.47 - --------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 0.36 24.13 (12.25)(b)(n) - --------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - --------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.96 1.98 1.73(a) Expenses after expense reductions (f) 1.77 1.88 1.73(a) Net investment loss (1.41) (1.42) (1.23)(a) Portfolio turnover 99 112 122 Net assets at end of period (000 Omitted) $4,417 $1,573 $454 - --------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R4 YEARS ENDED 8/31 --------------------- 2006 2005(i) Net asset value, beginning of period $16.84 $15.04 - ------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------- Net investment loss (d) $(0.21) $(0.04) Net realized and unrealized gain (loss) on investments and foreign currency 0.31 1.84 - ------------------------------------------------------------------------------------- Total from investment operations $0.10 $1.80 - ------------------------------------------------------------------------------------- Redemption fees added to paid-in capital (d) $0.00(w) $0.00(w) - ------------------------------------------------------------------------------------- Net asset value, end of period $16.94 $16.84 - ------------------------------------------------------------------------------------- Total return (%) (r)(s) 0.59 11.97(n) - ------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.62 1.63(a) Expenses after expense reductions (f) 1.52 1.53(a) Net investment loss (1.15) (0.66)(a) Portfolio turnover 99 112 Net assets at end of period (000 Omitted) $2,404 $334 - ------------------------------------------------------------------------------------- CLASS R5 YEARS ENDED 8/31 --------------------- 2006 2005(i) Net asset value, beginning of period $16.86 $15.04 - ------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------- Net investment loss (d) $(0.15) $(0.04) Net realized and unrealized gain (loss) on investments and foreign currency 0.30 1.86 - ------------------------------------------------------------------------------------- Total from investment operations $0.15 $1.82 - ------------------------------------------------------------------------------------- Redemption fees added to paid-in capital (d) $0.00(w) $0.00(w) - ------------------------------------------------------------------------------------- Net asset value, end of period $17.01 $16.86 - ------------------------------------------------------------------------------------- Total return (%) (r)(s) 0.89 12.10(n) - ------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.32 1.32(a) Expenses after expense reductions (f) 1.22 1.22(a) Net investment loss (0.84) (0.67)(a) Portfolio turnover 99 112 Net assets at end of period (000 Omitted) $59,999 $56 - ------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS 529A YEARS ENDED 8/31 --------------------------------------------------------------- 2006 2005 2004 2003 2002(i) Net asset value, beginning of period $16.73 $13.47 $14.53 $11.99 $11.95 - ------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.24) $(0.20) $(0.21) $(0.16) $(0.01) Net realized and unrealized gain (loss) on investments and foreign currency 0.30 3.46 (0.85) 2.70 0.05 - ------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.06 $3.26 $(1.06) $2.54 $0.04 - ------------------------------------------------------------------------------------------------------------------- Redemption fees added to paid-in capital (d) $0.00(w) $0.00(w) $0.00(w) $-- $-- - ------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $16.79 $16.73 $13.47 $14.53 $11.99 - ------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 0.36 24.20 (7.30)(b) 21.18 0.33(n) - ------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.83 1.83 1.75 1.84 1.83(a) Expenses after expense reductions (f) 1.72 1.73 1.75 N/A N/A Net investment loss (1.37) (1.27) (1.43) (1.35) (1.20)(a) Portfolio turnover 99 112 122 104 102 Net assets at end of period (000 Omitted) $1,630 $1,637 $390 $180 $10 - ------------------------------------------------------------------------------------------------------------------- CLASS 529B YEARS ENDED 8/31 --------------------------------------------------------------- 2006 2005 2004 2003 2002(i) Net asset value, beginning of period $16.07 $13.02 $14.15 $11.75 $11.71 - ------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.33) $(0.28) $(0.30) $(0.24) $(0.02) Net realized and unrealized gain (loss) on investments and foreign currency 0.29 3.33 (0.83) 2.64 0.06 - ------------------------------------------------------------------------------------------------------------------- Total from investment operations $(0.04) $3.05 $(1.13) $2.40 $0.04 - ------------------------------------------------------------------------------------------------------------------- Redemption fees added to paid-in capital (d) $0.00(w) $0.00(w) $0.00(w) $-- $-- - ------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $16.03 $16.07 $13.02 $14.15 $11.75 - ------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) (0.25) 23.43 (7.99)(b) 20.43 0.34(n) - ------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.47 2.47 2.40 2.49 2.48(a) Expenses after expense reductions (f) 2.37 2.37 2.40 N/A N/A Net investment loss (2.02) (1.93) (2.07) (1.99) (1.87)(a) Portfolio turnover 99 112 122 104 102 Net assets at end of period (000 Omitted) $211 $177 $135 $84 $6 - ------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS 529C YEARS ENDED 8/31 --------------------------------------------------------------- 2006 2005 2004 2003 2002(i) Net asset value, beginning of period $16.08 $13.03 $14.16 $11.77 $11.73 - ------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.34) $(0.28) $(0.31) $(0.24) $(0.02) Net realized and unrealized gain (loss) on investments and foreign currency 0.30 3.33 (0.82) 2.63 0.06 - ------------------------------------------------------------------------------------------------------------------- Total from investment operations $(0.04) $3.05 $(1.13) $2.39 $0.04 - ------------------------------------------------------------------------------------------------------------------- Redemption fees added to paid-in capital (d) $0.00(w) $0.00(w) $0.00(w) $-- $-- - ------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $16.04 $16.08 $13.03 $14.16 $11.77 - ------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) (0.25) 23.41 (7.98)(b) 20.31 0.34(n) - ------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.48 2.47 2.40 2.50 2.48(a) Expenses after expense reductions (f) 2.37 2.37 2.40 N/A N/A Net investment loss (2.02) (1.93) (2.08) (1.99) (1.88)(a) Portfolio turnover 99 112 122 104 102 Net assets at end of period (000 Omitted) $332 $333 $240 $147 $5 - ------------------------------------------------------------------------------------------------------------------- (a) Annualized. (b) The fund's net asset value and total return calculation include a non-recurring accrual recorded as a result of an administrative proceeding regarding disclosure of brokerage allocation practices in connection with fund sales. The non-recurring accrual did not have a material impact on the net asset value per share based on the shares outstanding on the day the proceeds were recorded. (d) Per share data are based on average shares outstanding. (f) Ratios do not reflect reductions from fees paid indirectly. (i) For the period from the class' inception, December 31, 2002 (Class R), July 31, 2002 (Classes 529A, 529B, and 529C), October 31, 2003 (Class R3) and April 1, 2005 (Classes R1, R2, R4, and R5) through the stated period end. (n) Not annualized. (r) Certain expenses have been reduced without which performance would have been lower. (s) From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower. (t) Total returns do not include any applicable sales charges. (w) Per share amount was less than $0.01. SEE NOTES TO FINANCIAL STATEMENTS NOTES TO FINANCIAL STATEMENTS (1) BUSINESS AND ORGANIZATION MFS New Discovery Fund (the fund) is a series of MFS Series Trust I (the trust). The trust is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open-end management investment company. (2) SIGNIFICANT ACCOUNTING POLICIES GENERAL - The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The fund will generally focus on securities of small size companies which may be more volatile than those of larger companies. The fund can invest in foreign securities, including securities of emerging market issuers. Investments in foreign securities are vulnerable to the effects of changes in the relative values of the local currency and the U.S. dollar and to the effects of changes in each country's legal, political, and economic environment. The markets of emerging markets countries are generally more volatile than the markets of developed countries with more mature economies. All of the risks of investing in foreign securities previously described are heightened when investing in emerging markets countries. INVESTMENT VALUATIONS - Equity securities, including restricted equity securities, are generally valued at the last sale or official closing price as reported by an independent pricing service on the market or exchange on which they are primarily traded. For securities for which there were no sales reported that day, equity securities are generally valued at the last quoted daily bid quotation as reported by an independent pricing service on the market or exchange on which they are primarily traded. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which approximates market value. Open-end investment companies are generally valued at their net asset value per share. Securities and other assets generally valued on the basis of information from an independent pricing service may also be valued at a broker-dealer bid quotation. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates reported by an independent pricing service. The Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund's investments (including any fair valuation) to the adviser pursuant to valuation policies and procedures approved by the Board. If the adviser determines that reliable market quotations are not readily available, investments are valued at fair value as determined in good faith by the adviser in accordance with such procedures under the oversight of the Board of Trustees. Under the fund's valuation policies and procedures, market quotations are not considered to be readily available for many types of debt instruments. These investments are generally valued at fair value based on information from independent pricing services. The adviser may rely on independent pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund's net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of investments used to determine the fund's net asset value may differ from quoted or published prices for the same investments. In addition, investments may be valued at fair value if the adviser determines that an investment's value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund's net asset value, or after the halting of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. Events that occur on a frequent basis after foreign markets close (such as developments in foreign markets and significant movements in the U.S. markets) and prior to the determination of the fund's net asset value may be deemed to have a material affect on the value of securities traded in foreign markets. Accordingly, the fund's foreign equity securities may often be valued at fair value. REPURCHASE AGREEMENTS - The fund may enter into repurchase agreements with institutions that the fund's investment adviser has determined are creditworthy. Each repurchase agreement is recorded at cost. The fund requires that the securities collateral in a repurchase transaction be transferred to the custodian in a manner sufficient to enable the fund to obtain those securities in the event of a default under the repurchase agreement. The fund monitors, on a daily basis, the value of the collateral to ensure that its value, including accrued interest, is greater than amounts owed to the fund under each such repurchase agreement. The fund, along with other affiliated entities of Massachusetts Financial Services Company (MFS), may utilize a joint trading account for the purpose of entering into one or more repurchase agreements. FOREIGN CURRENCY TRANSLATION - Purchases and sales of foreign investments, income, and expenses are converted into U.S. dollars based upon currency exchange rates prevailing on the respective dates of such transactions. Gains and losses attributable to foreign currency exchange rates on sales of securities are recorded for financial statement purposes as net realized gains and losses on investments. Gains and losses attributable to foreign exchange rate movements on income and expenses are recorded for financial statement purposes as foreign currency transaction gains and losses. That portion of both realized and unrealized gains and losses on investments that results from fluctuations in foreign currency exchange rates is not separately disclosed. SECURITY LOANS - State Street Bank and Trust Company ("State Street"), as lending agent, may loan the securities of the fund to certain qualified institutions (the "Borrowers") approved by the fund. The loans are collateralized at all times by cash and/or U.S. Treasury securities in an amount at least equal to the market value of the securities loaned. State Street provides the fund with indemnification against Borrower default. The fund bears the risk of loss with respect to the investment of cash collateral. On loans collateralized by cash, the cash collateral is invested in a money market fund or short-term securities. A portion of the income generated upon investment of the collateral is remitted to the Borrowers, and the remainder is allocated between the fund and the lending agent. On loans collateralized by U.S. Treasury securities, a fee is received from the Borrower, and is allocated between the fund and the lending agent. The dividend and interest income earned on the securities loaned is accounted for in the same manner as other dividend and interest income. SHORT TERM FEES - For purchases made on or after July 1, 2004 and before April 1, 2005, the fund charged a 2% redemption fee on proceeds from Class A, Class B, Class C, and Class I shares redeemed or exchanged within 5 business days following their acquisition. Effective April 1, 2005, the fund charges a 1% redemption fee on proceeds from Class A, Class B, Class C, and Class I shares redeemed or exchanged within 30 calendar days following their acquisition. Due to systems limitations associated with the transition from applying a 5 business day redemption fee to a 30 calendar day redemption fee, the fund did not impose redemption fees with respect to purchases made in March 2005 followed by redemptions made in April 2005. The fund may change the redemption fee period in the future, including in connection with Securities and Exchange Commission rule developments. See the fund's prospectus for details. Any redemption fees charged are accounted for as an addition to paid-in-capital. INVESTMENT TRANSACTIONS AND INCOME - Investment transactions are recorded on the trade date. Interest income is recorded on the accrual basis. All premium and discount is amortized or accreted for financial statement purposes in accordance with U.S. generally accepted accounting principles. All discount is accreted for tax reporting purposes as required by federal income tax regulations. Dividends received in cash are recorded on the ex-dividend date. Certain dividends from foreign securities will be recorded when the fund is informed of the dividend if such information is obtained subsequent to the ex-dividend date. Dividend and interest payments received in additional securities are recorded on the ex-dividend or ex-interest date in an amount equal to the value of the security on such date. The fund may receive proceeds from litigation settlements involving its portfolio holdings. Any proceeds received are reflected in realized gain/loss in the Statement of Operations, or in unrealized gain/loss if the security is still held by the fund. FEES PAID INDIRECTLY - The fund's custody fee is reduced according to an arrangement that measures the value of cash deposited with the custodian by the fund. During the year ended August 31, 2006, the fund's custodian fees were reduced by $72,814 under this arrangement. The fund has entered into a commission recapture agreement, under which certain brokers will credit the fund a portion of the commissions generated, to offset certain expenses of the fund. For the year ended August 31, 2006, the fund's custodian expenses were reduced by $28,425 under this agreement. These amounts are shown as a reduction of total expenses on the Statement of Operations. Effective January 1, 2006, the commission recapture agreement was terminated. TAX MATTERS AND DISTRIBUTIONS - The fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable income, including realized capital gains. Accordingly, no provision for federal income tax is required in the financial statements. Foreign taxes, if any, have been accrued by the fund in the accompanying financial statements. Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future. Distributions in excess of net investment income or net realized gains are temporary overdistributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions for financial statement and tax purposes. Book/tax differences primarily relate to net operating losses and wash sale loss deferrals. The fund declared no distributions for the years ended August 31, 2006 and August 31, 2005. The federal tax cost and the tax basis components of distributable earnings were as follows: AS OF 8/31/06 Cost of investments $971,410,113 ---------------------------------------------------------- Gross appreciation $72,646,419 Gross depreciation (66,486,925) ---------------------------------------------------------- Net unrealized appreciation (depreciation) $6,159,494 Capital loss carryforwards (173,770,410) Other temporary differences (35,320) As of August 31, 2006, the fund had capital loss carryforwards available to offset future realized gains. Such losses expire as follows: 8/31/11 $(173,770,410) In June 2006, FASB Interpretation No. 48, Accounting for Uncertainty in Income Taxes (the "Interpretation") was issued, and is effective for fiscal years beginning after December 15, 2006 and is to be applied to all open tax years as of the effective date. This Interpretation prescribes a minimum threshold for financial statement recognition of the benefit of a tax position taken or expected to be taken in a tax return, and requires certain expanded disclosures. Management has recently begun to evaluate the application of the Interpretation to the fund, and has not at this time determined the impact, if any, resulting from the adoption of this Interpretation on the fund's financial statements. MULTIPLE CLASSES OF SHARES OF BENEFICIAL INTEREST - The fund offers multiple classes of shares, which differ in their respective distribution and service fees. All shareholders bear the common expenses of the fund based on daily net assets of each class, without distinction between share classes. Dividends are declared separately for each class. Differences in per share dividend rates are generally due to differences in separate class expenses. Class B and Class 529B shares will convert to Class A and Class 529A shares, respectively, approximately eight years after purchase. (3) TRANSACTIONS WITH AFFILIATES INVESTMENT ADVISER - The fund has an investment advisory agreement with MFS to provide overall investment management and related administrative services and facilities to the fund. The management fee is computed daily and paid monthly at an annual rate of 0.90% of the fund's average daily net assets. The investment adviser has agreed in writing to reduce its management fee to 0.80% for the first $1.5 billion of average daily net assets and 0.75% of average daily net assets in excess of $1.5 billion. This written agreement may be rescinded only upon consent of the fund's Board of Trustees. This management fee reduction amounted to $910,276, which is shown as a reduction of total expenses in the Statement of Operations. The management fee incurred for the year ended August 31, 2006 was equivalent to an annual effective rate of 0.80% of the fund's average daily net assets. DISTRIBUTOR - MFS Fund Distributors, Inc. (MFD), a wholly-owned subsidiary of MFS, as distributor, received $42,788 and $1,049 for the year ended August 31, 2006, as its portion of the initial sales charge on sales of Class A and Class 529A shares of the fund, respectively. The Board of Trustees has adopted a distribution plan for certain class shares pursuant to Rule 12b-1 of the Investment Company Act of 1940. The fund's distribution plan provides that the fund will pay MFD for services provided by MFD and financial intermediaries in connection with the distribution and servicing of certain share classes. One component of the plan is a distribution fee paid to MFD and another component of the plan is a service fee paid to MFD. MFD may subsequently pay all, or a portion, of the distribution and/or service fees to financial intermediaries. Distribution Fee Plan Table: TOTAL ANNUAL DISTRIBUTION DISTRIBUTION SERVICE DISTRIBUTION EFFECTIVE AND SERVICE FEE RATE FEE RATE PLAN(d) RATE(e) FEE Class A 0.10% 0.25% 0.35% 0.35% $1,739,182 Class B 0.75% 0.25% 1.00% 1.00% 1,761,987 Class C 0.75% 0.25% 1.00% 1.00% 547,430 Class R 0.25% 0.25% 0.50% 0.50% 76,302 Class R1 0.50% 0.25% 0.75% 0.75% 4,456 Class R2 0.25% 0.25% 0.50% 0.50% 1,068 Class R3 0.25% 0.25% 0.50% 0.50% 13,534 Class R4 -- 0.25% 0.25% 0.25% 3,381 Class 529A 0.25% 0.25% 0.50% 0.35% 5,786 Class 529B 0.75% 0.25% 1.00% 1.00% 1,895 Class 529C 0.75% 0.25% 1.00% 1.00% 3,473 - --------------------------------------------------------------------------------------------------------------------- Total Distribution and Service Fees $4,158,494 (d) In accordance with the distribution plan for certain classes, the fund pays distribution and/or service fees up to these annual percentage rates of each class' average daily net assets. (e) The annual effective rates represent actual fees incurred under the distribution plan for the year ended August 31, 2006 based on each class' average daily net assets. 0.10% of the Class 529A distribution fee is currently being paid by the fund. Payment of the remaining 0.15% of the Class 529A distribution fee is not yet in effect and will be implemented on such date as the fund's Board of Trustees may determine. Certain Class A, Class C and Class 529C shares are subject to a contingent deferred sales charge in the event of a shareholder redemption within 12 months of purchase. Class B and Class 529B shares are subject to a contingent deferred sales charge in the event of a shareholder redemption within six years of purchase. All contingent deferred sales charges are paid to MFD and during the year ended August 31, 2006, were as follows: AMOUNT Class A $32,065 Class B 163,245 Class C 4,619 Class 529B -- Class 529C -- The fund has entered into and may from time to time enter into contracts with program managers and other parties which administer the tuition programs through which an investment in the fund's 529 share classes is made. The fund has entered into an agreement with MFD pursuant to which MFD receives an annual fee of up to 0.35% of the average daily net assets attributable to each 529 share class. The fee is based on average daily net assets and is currently established at 0.25% annually of average daily net assets of the fund's 529 share classes. The fee may only be increased with the approval of the Board of Trustees who oversees the fund. The services provided by MFD, or a third party with which MFD contracts, include recordkeeping and tax reporting and account services, as well as services designed to maintain the program's compliance with the Internal Revenue Code and other regulatory requirements. Program manager fees for the year ended August 31, 2006, were as follows: AMOUNT Class 529A $4,133 Class 529B 474 Class 529C 868 -------------------------------------------------- Total Program Manager Fees $5,475 SHAREHOLDER SERVICING AGENT - MFS Service Center, Inc. (MFSC), a wholly-owned subsidiary of MFS, receives a fee from the fund for its services as shareholder servicing agent calculated as a percentage of the average net assets of the fund as determined periodically under the supervision of the fund's Board of Trustees. For the year ended August 31, 2006, the fee was $889,306, which equated to 0.0978% annually of the fund's average daily net assets. MFSC also receives payment from the fund for out-of-pocket and sub-accounting expenses paid by MFSC on behalf of the fund. For the year ended August 31, 2006, these costs amounted to $336,554. The fund may also pay shareholder servicing related costs to non-related parties. ADMINISTRATOR - MFS provides certain financial, legal, shareholder communications, compliance, and other administrative services to the fund. Under an administrative services agreement, the fund partially reimburses MFS the costs incurred to provide these services. The fund is charged a fixed amount plus a fee based on calendar year average net assets. From July 1, 2005 through March 31, 2006, the fund's annual fixed amount was $10,000. Effective April 1, 2006, the fund's annual fixed amount is $17,500. The administrative services fee incurred for the year ended August 31, 2006 was equivalent to an annual effective rate of 0.0140% of the fund's average daily net assets. In addition to the administrative services provided by MFS to the fund as described above, MFS is responsible for providing certain retirement plan administration and services with respect to certain shares. These services include various administrative, recordkeeping, and communication/educational services with respect to the retirement plans which invest in these shares, and may be provided directly by MFS or by a third party. MFS may subsequently pay all, or a portion, of the retirement plan administration and services fee to affiliated or unaffiliated third parties. For the year ended August 31, 2006, the fund paid MFS an annual retirement plan administration and services fee up to the following annual percentage rates of each class' average daily net assets: ANNUAL EFFECTIVE TOTAL FEE RATE RATE(g) AMOUNT Class R1 0.45% 0.35% $2,674 Class R2 0.40% 0.26% 854 Class R3 0.25% 0.16% 6,767 Class R4 0.15% 0.15% 2,029 Class R5 0.10% 0.10% 42,578 - -------------------------------------------------------------------------- Total Retirement Plan Administration and Services Fees $54,902 (g) Effective October 1, 2005, MFS has agreed in writing to waive a portion of the retirement plan administration and services fee equal to 0.10% for Class R1 shares, 0.15% for Class R2 shares, and 0.10% for Class R3 shares. This agreement will continue until at least September 30, 2008. For the year ended August 31, 2006, this waiver amounted to $3,457 and is reflected as a reduction of total expenses in the Statement of Operations. TRUSTEES' AND OFFICERS' COMPENSATION - The fund pays compensation to Independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. The fund does not pay compensation directly to Trustees or officers of the fund who are also officers of the investment adviser, all of whom receive remuneration for their services to the fund from MFS. Certain officers and Trustees of the fund are officers or directors of MFS, MFD, and MFSC. The fund has an unfunded, defined benefit plan for certain retired Independent Trustees which resulted in a pension expense of $1,324. This amount is included in Independent trustees' compensation for the year ended August 31, 2006. The deferred liability for retirement benefits payable to certain retired Trustees amounted to $11,911 at August 31, 2006, and is included in payable for independent trustees' compensation. OTHER - This fund and certain other MFS funds (the funds) have entered into a services agreement (the Agreement) which provides for payment of fees by the funds to Tarantino LLC in return for the provision of services of an Independent Chief Compliance Officer (ICCO) for the funds. The ICCO is an officer of the funds and the sole member of Tarantino LLC. The funds can terminate the Agreement with Tarantino LLC at any time under the terms of the Agreement. For the year ended August 31, 2006, the fee paid to Tarantino LLC was $5,829. MFS has agreed to reimburse the fund for a portion of the payments made by the funds to Tarantino LLC in the amount of $5,155, which is shown as a reduction of total expenses in the Statement of Operations. Additionally, MFS has agreed to bear all expenses associated with office space, other administrative support, and supplies provided to the ICCO. (4) PORTFOLIO SECURITIES Purchases and sales of investments, other than U.S. government securities, purchased option transactions, and short-term obligations, aggregated $905,201,151 and $1,132,023,866, respectively. (5) SHARES OF BENEFICIAL INTEREST The fund's Declaration of Trust permits the Trustees to issue an unlimited number of full and fractional shares of beneficial interest. Transactions in fund shares were as follows: YEAR ENDED YEAR ENDED 8/31/06 8/31/05(i) SHARES AMOUNT SHARES AMOUNT Shares sold Class A 7,953,074 $139,051,896 11,949,697 $183,836,975 Class B 1,176,971 19,953,581 1,638,877 24,312,243 Class C 418,367 7,100,792 597,878 8,856,962 Class I 1,827,818 33,352,164 2,114,298 33,670,053 Class R 236,757 4,181,606 823,683 12,721,175 Class R1 61,944 999,073 14,762 221,653 Class R2 20,328 341,919 8,365 136,805 Class R3 243,261 4,169,079 91,932 1,476,280 Class R4 171,176 3,009,174 19,816 323,940 Class R5 4,426,023 77,317,122 3,325 50,000 Class 529A 11,358 199,860 90,426 1,445,550 Class 529B 2,886 46,842 1,657 24,184 Class 529C 3,525 58,773 6,597 99,344 - ---------------------------------------------------------------------------------------------------------- 16,553,488 $289,781,881 17,361,313 $267,175,164 Shares reacquired Class A (19,617,262) $(340,453,738) (37,108,405) $(566,755,888) Class B (5,571,782) (93,109,606) (6,760,662) (100,122,589) Class C (1,106,411) (18,501,073) (2,114,075) (31,372,384) Class I (1,248,388) (22,194,362) (3,323,601) (52,205,115) Class R (551,980) (9,634,623) (353,416) (5,455,149) Class R1 (21,640) (361,890) (2,033) (32,078) Class R2 (6,398) (104,910) -- -- Class R3 (74,071) (1,264,874) (31,541) (507,609) Class R4 (49,063) (884,331) -- -- Class R5 (902,323) (15,966,127) -- -- Class 529A (12,151) (209,557) (21,518) (328,291) Class 529B (747) (12,139) (961) (14,285) Class 529C (3,536) (59,168) (4,267) (63,294) - ----------------------------------------------------------------------------------------------------------- (29,165,752) $(502,756,398) (49,720,479) $(756,856,682) Net change Class A (11,664,188) $(201,401,842) (25,158,708) $(382,918,913) Class B (4,394,811) (73,156,025) (5,121,785) (75,810,346) Class C (688,044) (11,400,281) (1,516,197) (22,515,422) Class I 579,430 11,157,802 (1,209,303) (18,535,062) Class R (315,223) (5,453,017) 470,267 7,266,026 Class R1 40,304 637,183 12,729 189,575 Class R2 13,930 237,009 8,365 136,805 Class R3 169,190 2,904,205 60,391 968,671 Class R4 122,113 2,124,843 19,816 323,940 Class R5 3,523,700 61,350,995 3,325 50,000 Class 529A (793) (9,697) 68,908 1,117,259 Class 529B 2,139 34,703 696 9,899 Class 529C (11) (395) 2,330 36,050 - ----------------------------------------------------------------------------------------------------------- (12,612,264) $(212,974,517) (32,359,166) $(489,681,518) (i) For the period from the class' inception, April 1, 2005 (Classes R1, R2, R4, and R5), through the stated period end. The fund is one of several mutual funds in which the MFS funds-of-funds may invest. The MFS funds-of-funds do not invest in the underlying MFS funds for the purpose of exercising management or control. At the end of the period, the MFS Aggressive Growth Allocation Fund was the owner of record of approximately 7% of the value of outstanding voting shares. In addition, the MFS Lifetime 2030 Fund and the MFS Lifetime 2040 Fund were each the owners of record of less than 1% of the value of outstanding voting shares. (6) LINE OF CREDIT The fund and other affiliated funds participate in a $1 billion unsecured committed line of credit provided by a syndication of banks under a credit agreement. In addition, the fund and other affiliated funds have established uncommitted borrowing arrangements with certain banks. Borrowings may be made for temporary financing needs. Interest is charged to each fund, based on its borrowings, generally at a rate equal to the Federal Reserve funds rate plus 0.35%. In addition, a commitment fee, based on the average daily, unused portion of the committed line of credit, is allocated among the participating funds at the end of each calendar quarter. For the year ended August 31, 2006, the fund's commitment fee and interest expense were $6,055 and $13,039, respectively, and are included in miscellaneous expense on the Statement of Operations. REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM To the Trustees of MFS Series Trust I and Shareholders of MFS New Discovery Fund: We have audited the accompanying statement of assets and liabilities of MFS New Discovery Fund (the Fund) (one of the portfolios comprising MFS Series Trust I), including the portfolio of investments, as of August 31, 2006, and the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended, and the financial highlights for each of the periods indicated therein. These financial statements and financial highlights are the responsibility of the Fund's management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. We were not engaged to perform an audit of the Fund's internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Fund's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements and financial highlights, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of August 31, 2006, by correspondence with the Fund's custodian and brokers or by other appropriate auditing procedures where replies from brokers were not received. We believe that our audits provide a reasonable basis for our opinion. In our opinion, the financial statements and financial highlights referred to above present fairly, in all material respects, the financial position of MFS New Discovery Fund at August 31, 2006, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended, and its financial highlights for each of the periods indicated therein, in conformity with U.S. generally accepted accounting principles. ERNST & YOUNG LLP Boston, Massachusetts October 20, 2006 TRUSTEES AND OFFICERS -- IDENTIFICATION AND BACKGROUND The Trustees and officers of the Trust, as of October 1, 2006, are listed below, together with their principal occupations during the past five years. (Their titles may have varied during that period.) The address of each Trustee and officer is 500 Boylston Street, Boston, Massachusetts 02116. PRINCIPAL OCCUPATIONS DURING POSITION(s) HELD TRUSTEE/OFFICER THE PAST FIVE YEARS & NAME, DATE OF BIRTH WITH FUND SINCE(h) OTHER DIRECTORSHIPS(j) - ------------------- ---------------- --------------- ---------------------------- INTERESTED TRUSTEES Robert J. Manning(k) Trustee February 2004 Massachusetts Financial Services (born 10/20/63) Company, Chief Executive Officer, President, Chief Investment Officer and Director Robert C. Pozen(k) Trustee February 2004 Massachusetts Financial Services (born 8/08/46) Company, Chairman (since February 2004); Secretary of Economic Affairs, The Commonwealth of Massachusetts (January 2002 to December 2002); Fidelity Investments, Vice Chairman (June 2000 to December 2001); Fidelity Management & Research Company (investment adviser), President (March 1997 to July 2001); Bell Canada Enterprises (telecommunications), Director; Medtronic, Inc. (medical technology), Director; Telesat (satellite communications), Director INDEPENDENT TRUSTEES J. Atwood Ives Trustee and Chair February 1992 Private investor; Eastern (born 5/01/36) of Trustees Enterprises (diversified services company), Chairman, Trustee and Chief Executive Officer (until November 2000) Robert E. Butler(n) Trustee January 2006 Consultant - regulatory and (born 11/29/41) compliance matters (since July 2002); PricewaterhouseCoopers LLP (professional services firm), Partner (November 2000 until June 2002) Lawrence H. Cohn, M.D. Trustee August 1993 Brigham and Women's Hospital, (born 3/11/37) Senior Cardiac Surgeon, Chief of Cardiac Surgery (until 2005); Harvard Medical School, Professor of Surgery; Brigham and Women's Hospital Physicians' Organization, Chair (2000 to 2004) David H. Gunning Trustee January 2004 Cleveland-Cliffs Inc. (mining (born 5/30/42) products and service provider), Vice Chairman/Director (since April 2001); Encinitos Ventures (private investment company), Principal (1997 to April 2001); Lincoln Electric Holdings, Inc. (welding equipment manufacturer), Director William R. Gutow Trustee December 1993 Private investor and real estate (born 9/27/41) consultant; Capitol Entertainment Management Company (video franchise), Vice Chairman Michael Hegarty Trustee December 2004 Retired; AXA Financial (financial (born 12/21/44) services and insurance), Vice Chairman and Chief Operating Officer (until May 2001); The Equitable Life Assurance Society (insurance), President and Chief Operating Officer (until May 2001) Lawrence T. Perera Trustee July 1981 Hemenway & Barnes (attorneys), (born 6/23/35) Partner J. Dale Sherratt Trustee August 1993 Insight Resources, Inc. (born 9/23/38) (acquisition planning specialists), President; Wellfleet Investments (investor in health care companies), Managing General Partner (since 1993); Cambridge Nutraceuticals (professional nutritional products), Chief Executive Officer (until May 2001) Laurie J. Thomsen Trustee March 2005 Private investor; Prism Venture (born 8/05/57) Partners (venture capital), Co- founder and General Partner (until June 2004); St. Paul Travelers Companies (commercial property liability insurance), Director Robert W. Uek Trustee January 2006 Retired (since 1999); (born 5/18/41) PricewaterhouseCoopers LLP (professional services firm), Partner (until 1999); Consultant to investment company industry (since 2000); TT International Funds (mutual fund complex), Trustee (2000 until 2005); Hillview Investment Trust II Funds (mutual fund complex), Trustee (2000 until 2005) OFFICERS Maria F. Dwyer(k) President November 2005 Massachusetts Financial Services (born 12/01/58) Company, Executive Vice President and Chief Regulatory Officer (since March 2004); Fidelity Management & Research Company, Vice President (prior to March 2004); Fidelity Group of Funds, President and Treasurer (prior to March 2004) Tracy Atkinson(k) Treasurer September 2005 Massachusetts Financial Services (born 12/30/64) Company, Senior Vice President (since September 2004); PricewaterhouseCoopers LLP, Partner (prior to September 2004) Christopher R. Bohane(k) Assistant Secretary July 2005 Massachusetts Financial Services (born 1/18/74) and Assistant Clerk Company, Vice President and Senior Counsel (since April 2003); Kirkpatrick & Lockhart LLP (law firm), Associate (prior to April 2003) Ethan D. Corey(k) Assistant Secretary July 2005 Massachusetts Financial Services (born 11/21/63) and Assistant Clerk Company, Special Counsel (since December 2004); Dechert LLP (law firm), Counsel (prior to December 2004) David L. DiLorenzo(k) Assistant Treasurer July 2005 Massachusetts Financial Services (born 8/10/68) Company, Vice President (since June 2005); JP Morgan Investor Services, Vice President (prior to June 2005) Timothy M. Fagan(k) Assistant Secretary September 2005 Massachusetts Financial Services (born 7/10/68) and Assistant Clerk Company, Vice President and Senior Counsel (since September 2005); John Hancock Advisers, LLC, Vice President and Chief Compliance Officer (September 2004 to August 2005), Senior Attorney (prior to September 2004); John Hancock Group of Funds, Vice President and Chief Compliance Officer (September 2004 to December 2004) Mark D. Fischer(k) Assistant Treasurer July 2005 Massachusetts Financial Services (born 10/27/70) Company, Vice President (since May 2005); JP Morgan Investment Management Company, Vice President (prior to May 2005) Brian E. Langenfeld(k) Assistant Secretary June 2006 Massachusetts Financial Services (born 3/07/73) and Assistant Clerk Company, Assistant Vice President and Counsel (since May 2006); John Hancock Advisers, LLC, Assistant Vice President and Counsel (May 2005 to April 2006); John Hancock Advisers, LLC, Attorney and Assistant Secretary (prior to May 2005) Ellen Moynihan(k) Assistant Treasurer April 1997 Massachusetts Financial Services (born 11/13/57) Company, Senior Vice President Susan S. Newton(k) Assistant Secretary May 2005 Massachusetts Financial Services (born 3/07/50) and Assistant Clerk Company, Senior Vice President and Associate General Counsel (since April 2005); John Hancock Advisers, LLC, Senior Vice President, Secretary and Chief Legal Officer (prior to April 2005); John Hancock Group of Funds, Senior Vice President, Secretary and Chief Legal Officer (prior to April 2005) Susan A. Pereira(k) Assistant Secretary July 2005 Massachusetts Financial Services (born 11/05/70) and Assistant Clerk Company, Vice President and Senior Counsel (since June 2004); Bingham McCutchen LLP (law firm), Associate (prior to June 2004) Mark N. Polebaum(k) Secretary and Clerk January 2006 Massachusetts Financial Services (born 5/01/52) Company, Executive Vice President, General Counsel and Secretary (since January 2006); Wilmer Cutler Pickering Hale and Dorr LLP (law firm), Partner (prior to January 2006) Frank L. Tarantino Independent Chief June 2004 Tarantino LLC (provider of (born 3/07/44) Compliance Officer compliance services), Principal (since June 2004); CRA Business Strategies Group (consulting services), Executive Vice President (April 2003 to June 2004); David L. Babson & Co. (investment adviser), Managing Director, Chief Administrative Officer and Director (prior to March 2003) James O. Yost(k) Assistant Treasurer September 1990 Massachusetts Financial Services (born 6/12/60) Company, Senior Vice President - ------------ (h) Date first appointed to serve as Trustee/officer of an MFS fund. Each Trustee has served continuously since appointment unless indicated otherwise. (j) Directorships or trusteeships of companies required to report to the Securities and Exchange Commission (i.e., "public companies"). (k) "Interested person" of the Trust within the meaning of the Investment Company Act of 1940 (referred to as the 1940 Act), which is the principal federal law governing investment companies like the fund, as a result of position with MFS. The address of MFS is 500 Boylston Street, Boston, Massachusetts 02116. (n) In 2004 and 2005, Mr. Butler provided consulting services to the independent compliance consultant retained by MFS pursuant to its settlement with the SEC concerning market timing and related matters. The terms of that settlement required that compensation and expenses related to the independent compliance consultant be borne exclusively by MFS and, therefore, MFS paid Mr. Butler for the services he rendered to the independent compliance consultant. In 2004 and 2005, MFS paid Mr. Butler a total of $351,119.29. The Trust held a shareholders' meeting in 2005 to elect Trustees, and will hold a shareholders' meeting at least once every five years thereafter, to elect Trustees. Each Trustee (except Mr. Butler and Mr. Uek) has been elected by shareholders and each Trustee and officer holds office until his or her successor is chosen and qualified or until his or her earlier death, resignation, retirement or removal. Messrs. Butler, Sherratt and Uek and Ms. Thomsen are members of the Trust's Audit Committee. Each of the Trust's Trustees and officers holds comparable positions with certain other funds of which MFS or a subsidiary is the investment adviser or distributor, and, in the case of the officers, with certain affiliates of MFS. As of January 1, 2006, the Trustees served as board members of 98 funds within the MFS Family of Funds. The Statement of Additional Information contains further information about the Trustees and is available without charge upon request by calling 1-800-225-2606. - ------------------------------------------------------------------------------------------------------- INVESTMENT ADVISER CUSTODIAN Massachusetts Financial Services Company State Street Bank and Trust Company 500 Boylston Street, Boston, MA 225 Franklin Street, Boston, MA 02110 02116-3741 INDEPENDENT REGISTERED PUBLIC DISTRIBUTOR ACCOUNTING FIRM MFS Fund Distributors, Inc. Ernst & Young LLP 500 Boylston Street, Boston, MA 200 Clarendon Street, Boston, MA 02116 02116-3741 PORTFOLIO MANAGER Thomas H. Wetherald BOARD REVIEW OF INVESTMENT ADVISORY AGREEMENT The Investment Company Act of 1940 requires that both the full Board of Trustees and a majority of the non-interested ("independent") Trustees, voting separately, annually approve the continuation of the Fund's investment advisory agreement with MFS. The Trustees consider matters bearing on the Fund and its advisory arrangements at their meetings throughout the year, including a review of performance data at each regular meeting. In addition, the independent Trustees met several times over the course of three months beginning in May and ending in July, 2006 ("contract review meetings") for the specific purpose of considering whether to approve the continuation of the investment advisory agreement for the Fund and the other investment companies that the Board oversees (the "MFS Funds"). The independent Trustees were assisted in their evaluation of the Fund's investment advisory agreement by independent legal counsel, from whom they received separate legal advice and with whom they met separately from MFS during various contract review meetings. The independent Trustees were also assisted in this process by the MFS Funds' Independent Chief Compliance Officer, a full-time senior officer appointed by and reporting to the independent Trustees. In connection with their deliberations regarding the continuation of the investment advisory agreement, the Trustees, including the independent Trustees, considered such information and factors as they believed, in light of the legal advice furnished to them and their own business judgment, to be relevant. The investment advisory agreement for the Fund was considered separately, although the Trustees also took into account the common interests of all MFS Funds in their review. As described below, the Trustees considered the nature, quality, and extent of the various investment advisory, administrative, and shareholder services performed by MFS under the existing investment advisory agreement and other arrangements with the Fund. In connection with their contract review meetings, the Trustees received and relied upon materials which included, among other items: (i) information provided by Lipper Inc. on the investment performance of the Fund for various time periods ended December 31, 2005 and the investment performance of a group of funds with substantially similar investment classifications/objectives (the "Lipper performance universe"), as well as the investment performance of a group of funds identified by objective criteria suggested by MFS ("MFS peer funds"), (ii) information provided by Lipper Inc. on the Fund's advisory fees and other expenses and the advisory fees and other expenses of comparable funds identified by Lipper (the "Lipper expense group"), as well as the advisory fees and other expenses of MFS peer funds, (iii) information provided by MFS on the advisory fees of comparable portfolios of other clients of MFS, including institutional separate accounts and other clients, (iv) information as to whether and to what extent applicable expense waivers, reimbursements or fee "breakpoints" are observed for the Fund, (v) information regarding MFS' financial results and financial condition, including MFS' and certain of its affiliates' estimated profitability from services performed for the Fund and the MFS Funds as a whole, (vi) MFS' views regarding the outlook for the mutual fund industry and the strategic business plans of MFS, (vii) descriptions of various functions performed by MFS for the Funds, such as compliance monitoring and portfolio trading practices, and (viii) information regarding the overall organization of MFS, including information about MFS' senior management and other personnel providing investment advisory, administrative and other services to the Fund and the other MFS Funds. The comparative performance, fee and expense information prepared and provided by Lipper Inc. was not independently verified and the independent Trustees did not independently verify any information provided to them by MFS. The Trustees' conclusion as to the continuation of the investment advisory agreement was based on a comprehensive consideration of all information provided to the Trustees and not the result of any single factor. Some of the factors that figured particularly in the Trustees' deliberations are described below, although individual Trustees may have evaluated the information presented differently from one another, giving different weights to various factors. It is also important to recognize that the fee arrangements for the Fund and other MFS Funds are the result of years of review and discussion between the independent Trustees and MFS, that certain aspects of such arrangements may receive greater scrutiny in some years than others, and that the Trustees' conclusions may be based, in part, on their consideration of these same arrangements during the course of the year and in prior years. Based on information provided by Lipper Inc. and MFS, the Trustees reviewed the Fund's total return investment performance as well as the performance of peer groups of funds over various time periods. The Trustees placed particular emphasis on the total return performance of the Fund's Class A shares in comparison to the performance of funds in its Lipper performance universe over the three-year period ended December 31, 2005, which the Trustees believed was a long enough period to reflect differing market conditions. The Fund's performance was in the 5th quintile relative to the other funds in the universe for this three-year period (the 1st quintile being the best performers and the 5th quintile being the worst performers). The total return performance of the Fund's Class A shares was in the 4th quintile for the one-year and five-year periods ended December 31, 2005 relative to the Lipper performance universe. Because of the passage of time, these performance results may differ from the performance results for more recent periods, including those shown elsewhere in this report. The Trustees expressed concern to MFS about the ongoing substandard investment performance of the Fund. In the course of their deliberations, the Trustees took into account information provided by MFS in connection with the contract review meetings, as well as during investment review meetings conducted with portfolio management personnel during the course of the year, as to MFS' efforts to improve the Fund's performance, including the recent restructuring of responsibilities among MFS' senior investment management executives and changes to the portfolio management team in 2004 and 2005. In addition, the Trustees requested that they receive a separate update on the Fund's performance at each of their meetings. After reviewing these and related factors, the Trustees concluded, within the context of their overall conclusions regarding the investment advisory agreement, that MFS' responses and efforts and plans to improve investment performance were sufficient to support approval of the continuance of the investment advisory agreement for an additional one year period, but that they would continue to closely monitor the performance of the Fund. In assessing the reasonableness of the Fund's advisory fee, the Trustees considered, among other information, the Fund's advisory fee and the total expense ratio of the Fund's Class A shares as a percentage of average net assets and the advisory fee and total expense ratios of peer groups of funds based on information provided by Lipper Inc. and MFS. The Trustees considered that MFS has agreed in writing to waive a portion of its advisory fee, which may not be changed without the Trustees' approval. The Trustees also considered that, according to the Lipper data, the Fund's effective advisory fee rate was at the Lipper expense group median, and the Fund's total expense ratio was higher than the Lipper expense group median. The Trustees also considered the advisory fees charged by MFS to institutional accounts. In comparing these fees, the Trustees considered information provided by MFS as to the generally broader scope of services provided by MFS to the Fund in comparison to institutional accounts, the higher demands placed on MFS' investment personnel and trading infrastructure as a result of the daily cash in-flows and out-flows of the Fund, and the impact on MFS and expenses associated with the more extensive regulatory regime to which the Fund is subject in comparison to institutional accounts. The Trustees also considered whether the Fund is likely to benefit from any economies of scale in the management of the Fund in the event of growth in assets of the Fund. They noted that the Fund's advisory fee rate schedule is currently subject to a breakpoint as a result of the advisory fee waiver described above. The Trustees concluded that the existing breakpoint was sufficient to allow the Fund to benefit from economies of scale as its assets grow. The Trustees also considered information prepared by MFS relating to MFS' costs and profits with respect to the Fund, the MFS Funds considered as a group, and other investment companies and accounts advised by MFS, as well as MFS' methodologies used to determine and allocate its costs to the MFS Funds, the Fund and other accounts and products for purposes of estimating profitability. After reviewing these and other factors described herein, the Trustees concluded, within the context of their overall conclusions regarding the investment advisory agreement, that the advisory fees charged to the Fund represent reasonable compensation in light of the services being provided by MFS to the Fund. In addition, the Trustees considered MFS' resources and related efforts to continue to retain, attract and motivate capable personnel to serve the Fund. The Trustees also considered current and developing conditions in the financial services industry, including the entry into the industry of large and well-capitalized companies which are spending, and appear to be prepared to continue to spend, substantial sums to engage personnel and to provide services to competing investment companies. In this regard, the Trustees also considered the financial resources of MFS and its ultimate parent, Sun Life Financial Inc. The Trustees also considered the advantages and possible disadvantages to the Fund of having an adviser which also serves other investment companies as well as other accounts. The Trustees also considered the nature, quality, cost, and extent of administrative, transfer agency, and distribution services provided to the Fund by MFS and its affiliates under agreements and plans other than the investment advisory agreement, including any 12b-1 fees the Fund pays to MFS Fund Distributors, Inc., an affiliate of MFS. The Trustees also considered the nature, extent and quality of certain other services MFS performs or arranges for on the Fund's behalf, which may include securities lending programs, directed expense payment programs, class action recovery programs, and MFS' interaction with third-party service providers, principally custodians and sub-custodians. The Trustees concluded that the various non-advisory services provided by MFS and its affiliates on behalf of the Funds were satisfactory. The Trustees also considered benefits to MFS from the use of the Fund's portfolio brokerage commissions, if applicable, to pay for investment research and other similar services (excluding third-party research, for which MFS pays directly), and various other factors. Additionally, the Trustees considered so-called "fall-out benefits" to MFS such as reputational value derived from serving as investment manager to the Fund. Based on their evaluation of factors that they deemed to be material, including those factors described above, the Board of Trustees, including a majority of the independent Trustees, concluded that the Fund's investment advisory agreement with MFS should be continued for an additional one-year period, commencing August 1, 2006. A discussion regarding the Board's most recent review and renewal of the Fund's investment advisory agreement will be available on or before November 1, 2006 by clicking on the fund's name under "Select a fund" on the MFS Web site (mfs.com). PROXY VOTING POLICIES AND INFORMATION A general description of the MFS funds' proxy voting policies and procedures is available without charge, upon request, by calling 1-800-225-2606, by visiting the Proxy Voting section of mfs.com or by visiting the SEC's Web site at http://www.sec.gov. Information regarding how the fund voted proxies relating to portfolio securities during the most recent twelve-month period ended June 30 is available without charge by visiting the Proxy Voting section of mfs.com or by visiting the SEC's Web site at http://www.sec.gov. QUARTERLY PORTFOLIO DISCLOSURE The fund will file a complete schedule of portfolio holdings with the Securities and Exchange Commission (the Commission) for the first and third quarters of each fiscal year on Form N-Q. The fund's Form N-Q may be reviewed and copied at the: Public Reference Room Securities and Exchange Commission 100 F Street, NE, Room 1580 Washington, D.C. 20549 Information on the operation of the Public Reference Room may be obtained by calling the Commission at 1-202-551-5850. The fund's Form N-Q is available on the EDGAR database on the Commission's Internet Web site at http://www.sec.gov, and copies of this information may be obtained, upon payment of a duplicating fee, by electronic request at the following e-mail address: publicinfo@sec.gov or by writing the Public Reference Section at the above address. A shareholder can also obtain the quarterly portfolio holdings report at mfs.com. FEDERAL TAX INFORMATION (unaudited) The fund will notify shareholders of amounts for use in preparing 2006 income tax forms in January 2007. MFS(R) PRIVACY NOTICE Privacy is a concern for every investor today. At MFS Investment Management(R) and the MFS funds, we take this concern very seriously. We want you to understand our policies about the investment products and services that we offer, and how we protect the nonpublic personal information of investors who have a direct relationship with us and our wholly owned subsidiaries. Throughout our business relationship, you provide us with personal information. We maintain information and records about you, your investments, and the services you use. Examples of the nonpublic personal information we maintain include o data from investment applications and other forms o share balances and transactional history with us, our affiliates, or others o facts from a consumer reporting agency We do not disclose any nonpublic personal information about our customers or former customers to anyone, except as permitted by law. We may share nonpublic personal information with third parties or certain of our affiliates in connection with servicing your account or processing your transactions. We may share information with companies or financial institutions that perform marketing services on our behalf or with other financial institutions with which we have joint marketing arrangements, subject to any legal requirements. Authorization to access your nonpublic personal information is limited to appropriate personnel who provide products, services, or information to you. We maintain physical, electronic, and procedural safeguards to help protect the personal information we collect about you. If you have any questions about the MFS privacy policy, please call 1-800-225-2606 any business day between 8 a.m. and 8 p.m. Eastern time. Note: If you own MFS products or receive MFS services in the name of a third party such as a bank or broker-dealer, their privacy policy may apply to you instead of ours. CONTACT US WEB SITE MAILING ADDRESS mfs.com MFS Service Center, Inc. P.O. Box 55824 MFS TALK Boston, MA 1-800-637-8255 02205-5824 24 hours a day OVERNIGHT MAIL ACCOUNT SERVICE AND MFS Service Center, Inc. LITERATURE 500 Boylston Street Boston, MA 02116-3741 SHAREHOLDERS 1-800-225-2606 8 a.m. to 8 p.m. ET INVESTMENT PROFESSIONALS 1-800-343-2829 8 a.m. to 8 p.m. ET RETIREMENT PLAN SERVICES 1-800-637-1255 8 a.m. to 8 p.m. ET - ------------------------------------------------------------------------------- Go paperless with eDELIVERY: Arrange to have MFS send prospectuses, reports, and proxies directly to your e-mail inbox. You'll get timely information and less clutter in your mailbox (not to mention help your fund save printing and postage costs). SIGN UP: If your account is registered with us, simply go to mfs.com, log in to your account via MFS Access, and select the eDelivery sign up options. If you own your MFS fund shares through a financial institution or a retirement plan, MFS TALK, MFS Access, and eDelivery may not be available to you. - ------------------------------------------------------------------------------- M F S(R) INVESTMENT MANAGEMENT M F S(R) INVESTMENT MANAGEMENT [graphic omitted] ANNUAL REPORT KEEPING YOU INFORMED MFS wants to ensure that you are consistently updated about your investments with us. This shareholder report will not only show how your investment performed during the time period, but will also provide you with informative commentary from the portfolio management team. They will offer an overview of market conditions and will also discuss the specific factors that may have enhanced or detracted from your investment's performance. MFS(R) CORE EQUITY FUND LETTER FROM THE CEO 1 - ----------------------------------------------------------------- PORTFOLIO COMPOSITION 2 - ----------------------------------------------------------------- MANAGEMENT REVIEW 3 - ----------------------------------------------------------------- PERFORMANCE SUMMARY 5 - ----------------------------------------------------------------- EXPENSE TABLE 8 - ----------------------------------------------------------------- PORTFOLIO OF INVESTMENTS 10 - ----------------------------------------------------------------- STATEMENT OF ASSETS AND LIABILITIES 18 - ----------------------------------------------------------------- STATEMENT OF OPERATIONS 21 - ----------------------------------------------------------------- STATEMENTS OF CHANGES IN NET ASSETS 23 - ----------------------------------------------------------------- FINANCIAL HIGHLIGHTS 24 - ----------------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 32 - ----------------------------------------------------------------- REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM 42 - ----------------------------------------------------------------- TRUSTEES AND OFFICERS 43 - ----------------------------------------------------------------- BOARD REVIEW OF INVESTMENT ADVISORY AGREEMENT 49 - ----------------------------------------------------------------- PROXY VOTING POLICIES AND INFORMATION 53 - ----------------------------------------------------------------- QUARTERLY PORTFOLIO DISCLOSURE 53 - ----------------------------------------------------------------- FEDERAL TAX INFORMATION 53 - ----------------------------------------------------------------- MFS(R) PRIVACY NOTICE 54 - ----------------------------------------------------------------- CONTACT INFORMATION BACK COVER - ----------------------------------------------------------------- Fund objective: Seeks to provide long-term growth of capital. THE REPORT IS PREPARED FOR THE GENERAL INFORMATION OF SHAREHOLDERS. IT IS AUTHORIZED FOR DISTRIBUTION TO PROSPECTIVE INVESTORS ONLY WHEN PRECEDED OR ACCOMPANIED BY A CURRENT PROSPECTUS. - ------------------------------------------------------------------------------- NOT FDIC INSURED o MAY LOSE VALUE o NO BANK OR CREDIT UNION GUARANTEE o NOT A DEPOSIT o NOT INSURED BY ANY FEDERAL GOVERNMENT AGENCY OR NCUA/NCUSIF - ------------------------------------------------------------------------------- 8/31/06 RGI-ANN LETTER FROM THE CEO [Photo of Robert J. Manning] Dear Shareholders: The story is as old as the tortoise and the hare, but we believe it is still relevant today -- "slow and steady" is the way to go when it comes to investing. While financial markets will naturally ebb and flow over time, investors who remain committed to a long-term investment strategy are more likely to achieve their goals than those who consistently chase short-term performance. The first half of 2006 brought a high degree of fluctuation in markets around the globe as varying economic factors pulled markets in opposite directions. The global economy, for example, continued to grow at its fastest pace in three decades -- spurred by increased international trade, good job growth, and wage increases. At the same time, central banks around the world raised interest rates in sync in a collaborative attempt to curb inflation. While this was a positive development in some regions, in other cases, economic and market gains were tempered. What does all of this mean to you as an investor? If you're focused on the long term, these global developments become part of a longer cycle instead of one-time events that can have a significant impact on your portfolio. At MFS(R), our investment management process -- honed over 80 years -- combines a unique teamwork approach with an unwavering focus on helping you realize your long-term financial goals. We believe in a three-pronged investment strategy: o ALLOCATE holdings across the major asset classes -- including stocks, bonds, and cash. o DIVERSIFY within each class to take advantage of different market segments and investing styles. o REBALANCE assets regularly to maintain a desired asset allocation. Of course, these strategies cannot guarantee a profit or protect against a loss. Investing and planning for the long term requires diligence and patience, two traits that in our experience are essential to capitalizing on the many opportunities the financial markets can offer -- through both up and down economic cycles. Respectfully, /s/ Robert J. Manning Robert J. Manning Chief Executive Officer and Chief Investment Officer MFS Investment Management(R) October 13, 2006 The opinions expressed in this letter are subject to change, may not be relied upon for investment advice, and no forecasts can be guaranteed. PORTFOLIO COMPOSITION PORTFOLIO STRUCTURE Common Stocks 99.1% Cash & Other Net Assets 0.9% TOP TEN HOLDINGS Exxon Mobil Corp. 3.3% ------------------------------------------------ Altria Group, Inc. 3.2% ------------------------------------------------ Bank of America Corp. 2.2% ------------------------------------------------ Hewlett-Packard Co. 2.2% ------------------------------------------------ Praxair, Inc. 1.8% ------------------------------------------------ Lockheed Martin Corp. 1.6% ------------------------------------------------ Johnson & Johnson 1.6% ------------------------------------------------ Chevron Corp. 1.5% ------------------------------------------------ Intel Corp. 1.4% ------------------------------------------------ American Express Co. 1.3% ------------------------------------------------ EQUITY SECTORS Financial Services 21.2% ------------------------------------------------ Technology 14.7% ------------------------------------------------ Health Care 13.1% ------------------------------------------------ Energy 8.3% ------------------------------------------------ Utilities & Communications 7.4% ------------------------------------------------ Consumer Staples 6.7% ------------------------------------------------ Retailing 5.8% ------------------------------------------------ Industrial Goods & Services 5.8% ------------------------------------------------ Leisure 5.7% ------------------------------------------------ Basic Materials 5.4% ------------------------------------------------ Special Products & Services 2.0% ------------------------------------------------ Transportation 1.6% ------------------------------------------------ Autos & Housing 1.4% ------------------------------------------------ Percentages are based on net assets as of 8/31/06. The portfolio is actively managed and current holdings may be different. MANAGEMENT REVIEW SUMMARY OF RESULTS For the twelve months ended August 31, 2006, Class A shares of the MFS Core Equity Fund provided a total return of 6.25%, at net asset value. This compares with a return of 8.75% for the fund's benchmark the Russell 3000 Index. The Russell 3000 Index became the fund's benchmark effective July 20, 2006. For the period August 31, 2005 to July 19, 2006, the fund's benchmark was the Standard & Poor's 500 Stock Index (S&P 500 Stock Index). The return for the S&P 500 Stock Index for the twelve months ended August 31, 2006 was 8.88%. DETRACTORS FROM PERFORMANCE Stock selection in the leisure sector was the greatest detractor from performance relative to the S&P 500 Stock Index over the period. Within this sector, our holdings in satellite radio service company XM Satellite Radio* (not a benchmark constituent) hurt results. Weaker-than-expected subscriber growth and a slower rollout of new products led to lower-than-expected earnings and put pressure on its share price during the period. Stock selection in the utilities and communications sector also held back results. Within this sector, holdings in wireless services provider Sprint Nextel and our avoidance of strong-performing telecommunications services provider BellSouth hindered relative performance. Shares of Sprint Nextel struggled after the company lowered its wireless subscriber guidance for 2006 as its merger integration with Nextel disappointed investors. Security selection in the retailing sector also hurt performance, although no individual stocks were among the fund's top relative detractors. Elsewhere, the fund's positions in network equipment manufacturer Juniper Networks and computer maker Dell* held back performance. Integrated logistics company UTi Worldwide, newsprint manufacturer Abitibi-Consolidated, managed health services company Health Net*, none of which are benchmark constituents, detracted from relative returns. Additionally, our underweighted position in strong-performing banking firm JPMorgan Chase was also a drag on results. CONTRIBUTORS TO PERFORMANCE Security selection in the basic materials sector bolstered relative performance during the period. Within basic materials, agrichemical products company Monsanto and diversified mining company Companhia Vale do Rio Doce* (not a benchmark constituent) were among the fund's top contributing holdings. Monsanto's stock price gained substantially over the period as it demonstrated continued strong growth in its seeds and traits business. Companhia Vale do Rio Doce benefited from strong demand and increased prices for commodities, particularly iron ore. The technology sector also aided relative results as several individual holdings in this sector performed well. These included flash memory storage products maker SanDisk and business intelligence software company MicroStrategy* (not a benchmark constituent). Not owning benchmark constituent Microsoft also helped results as the software giant performed poorly over the period. Stock selection in the industrial goods and services sector also contributed to returns, although no individual holdings were among the fund's top relative performers. Other individual securities that helped results included banking firm Golden West Financial*, freight railway operator Norfolk Southern, tobacco and consumer goods manufacturer Altria Group, and integrated oil and gas company Hess. Respectfully, Katrina A. Mead Portfolio Manager * Security was not held in the portfolio at period end. The views expressed in this report are those of the portfolio manager only through the end of the period of the report as stated on the cover and do not necessarily reflect the views of MFS or any other person in the MFS organization. These views are subject to change at any time based on market and other conditions, and MFS disclaims any responsibility to update such views. These views may not be relied upon as investment advice or an indication of trading intent on behalf of any MFS portfolio. References to specific securities are not recommendations of such securities, and may not be representative of any MFS portfolio's current or future investments. PERFORMANCE SUMMARY THROUGH 8/31/06 The following chart illustrates the historical performance of the fund's Class A shares in comparison to its benchmark. Performance results include the deduction of the maximum applicable sales charge and reflect the percentage change in net asset value, including reinvestment of dividends and capital gains distributions. The performance of other share classes will be greater than or less than that of the class depicted below. Benchmark comparisons are unmanaged; do not reflect sales charges, commissions or expenses; and cannot be invested in directly. (See Notes to Performance Summary.) PERFORMANCE DATA SHOWN REPRESENTS PAST PERFORMANCE AND IS NO GUARANTEE OF FUTURE RESULTS. INVESTMENT RETURN AND PRINCIPAL VALUE FLUCTUATE SO YOUR SHARES, WHEN SOLD, MAY BE WORTH MORE OR LESS THAN THE ORIGINAL COST; CURRENT PERFORMANCE MAY BE LOWER OR HIGHER THAN QUOTED. FOR MOST RECENT MONTH-END PERFORMANCE, PLEASE VISIT MFS.COM. (FOR THE MOST RECENT MONTH-END PERFORMANCE FOR CLASS I SHARES CALL 1-800-343-2829.) THE PERFORMANCE SHOWN DOES NOT REFLECT THE DEDUCTION OF TAXES, IF ANY, THAT A SHAREHOLDER WOULD PAY ON FUND DISTRIBUTIONS OR THE REDEMPTION OF FUND SHARES. GROWTH OF A HYPOTHETICAL $10,000 INVESTMENT MFS Core Russell Standard & Poor's Equity Fund 3000 500 Stock - Class A Index Index 8/96 $ 9,425 $10,000 $10,000 8/97 12,839 13,837 14,065 8/98 13,652 14,322 15,203 8/99 17,562 19,833 21,258 8/00 19,978 23,926 24,727 8/01 16,082 18,060 18,696 8/02 13,509 14,936 15,332 8/03 15,086 17,016 17,182 8/04 16,576 18,940 19,150 8/05 19,308 21,841 21,555 8/06 20,515 23,753 23,470 TOTAL RETURNS THROUGH 8/31/06 AVERAGE ANNUAL WITHOUT SALES CHARGE Share class Class inception date 1-yr 5-yr 10-yr - ----------------------------------------------------------------------------- A 1/02/96 6.25% 4.99% 8.09% - ----------------------------------------------------------------------------- B 1/02/97 5.60% 4.33% 7.35% - ----------------------------------------------------------------------------- C 1/02/97 5.56% 4.32% 7.33% - ----------------------------------------------------------------------------- I 1/02/97 6.66% 5.37% 8.45% - ----------------------------------------------------------------------------- R 12/31/02 6.11% 4.87% 8.03% - ----------------------------------------------------------------------------- R1 4/01/05 5.43% 4.75% 7.97% - ----------------------------------------------------------------------------- R2 4/01/05 5.85% 4.86% 8.02% - ----------------------------------------------------------------------------- R3 10/31/03 5.96% 4.80% 7.99% - ----------------------------------------------------------------------------- R4 4/01/05 6.14% 4.97% 8.08% - ----------------------------------------------------------------------------- R5 4/01/05 6.54% 5.07% 8.13% - ----------------------------------------------------------------------------- AVERAGE ANNUAL Comparative benchmarks - ----------------------------------------------------------------------------- Russell 3000 Index (f) 8.75% 5.63% 9.04% - ----------------------------------------------------------------------------- Standard & Poor's 500 Stock Index (e)(f) 8.88% 4.65% 8.91% - ----------------------------------------------------------------------------- AVERAGE ANNUAL WITH SALES CHARGE Share class - ----------------------------------------------------------------------------- A 0.14% 3.75% 7.45% With Initial Sales Charge (5.75%) - ----------------------------------------------------------------------------- B 1.60% 3.99% 7.35% With CDSC (Declining over six years from 4% to 0%) (x) - ----------------------------------------------------------------------------- C 4.56% 4.32% 7.33% With CDSC (1% for 12 months) (x) - ----------------------------------------------------------------------------- Class I, R, R1, R2, R3, R4, and R5 shares do not have a sales charge. Please see Notes to Performance Summary for more details. CDSC - Contingent Deferred Sales Charge. (e) Effective July 20, 2006, we no longer use the Standard & Poor's 500 Stock Index as a benchmark because we believe the Russell 3000 Index better reflects the fund's investment policies and objectives. (f) Source: FactSet Research Systems Inc. (x) Assuming redemption at the end of the applicable period. INDEX DEFINITIONS Russell 3000 Index - constructed to provide a comprehensive barometer for the 3,000 largest U.S. companies based on total market capitalization, which represents approximately 98% of the investable U.S. equity market. Standard & Poor's 500 Stock Index - a capitalization-weighted index of 500 widely held equity securities, designed to measure broad U.S. equity performance. It is not possible to invest directly in an index. NOTES TO PERFORMANCE SUMMARY Class R shares are available only to existing Class R shareholders. Class I shares are only available to certain eligible investors, and Class R1, R2, R3, R4, and R5 shares are only available to certain retirement plans. Performance for share classes offered after Class A shares includes the performance of the fund's Class A shares for periods prior to their offering. This blended class performance has been adjusted to take into account differences in sales loads, if any, applicable to these share classes, but has not been adjusted to take into account differences in class specific operating expenses (such as Rule 12b-1 fees). Compared to performance these share classes would have experienced had they been offered for the entire period, the use of blended performance generally results in higher performance for share classes with higher operating expenses than the share class to which it is blended, and lower performance for share classes with lower operating expenses than the share class to which it is blended. Performance results reflect any applicable expense subsidies and waivers in effect during the periods shown. Without such subsidies and waivers the fund's performance results would be less favorable. Please see the prospectus and financial statements for complete details. From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower. EXPENSE TABLE Fund expenses borne by the shareholders during the period, March 1, 2006 through August 31, 2006. As a shareholder of the fund, you incur two types of costs: (1) transaction costs, including sales charges (loads) on certain purchase or redemption payments and redemption fees on certain exchanges and redemptions, and (2) ongoing costs, including management fees; distribution and service (12b-1) fees; and other fund expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in the fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period March 1, 2006 through August 31, 2006. ACTUAL EXPENSES The first line for each share class in the following table provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number in the first line under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. HYPOTHETICAL EXAMPLE FOR COMPARISON PURPOSES The second line for each share class in the following table provides information about hypothetical account values and hypothetical expenses based on the fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs, such as sales charges (loads) or redemption fees. Therefore, the second line for each share class in the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher. - ------------------------------------------------------------------------------- Expenses Paid During Annualized Beginning Ending Period(p) Share Expense Account Value Account Value 3/01/06- Class Ratio 3/01/06 8/31/06 8/31/06 - -------------------------------------------------------------------------------- Actual 1.35% $1,000.00 $1,006.10 $6.83 A ----------------------------------------------------------------------- Hypothetical (h) 1.35% $1,000.00 $1,018.40 $6.87 - -------------------------------------------------------------------------------- Actual 2.00% $1,000.00 $1,003.50 $10.10 B ----------------------------------------------------------------------- Hypothetical (h) 2.00% $1,000.00 $1,015.12 $10.16 - -------------------------------------------------------------------------------- Actual 2.00% $1,000.00 $1,003.50 $10.10 C ----------------------------------------------------------------------- Hypothetical (h) 2.00% $1,000.00 $1,015.12 $10.16 - -------------------------------------------------------------------------------- Actual 1.00% $1,000.00 $1,008.60 $5.06 I ----------------------------------------------------------------------- Hypothetical (h) 1.00% $1,000.00 $1,020.16 $5.09 - -------------------------------------------------------------------------------- Actual 1.50% $1,000.00 $1,005.60 $7.58 R ----------------------------------------------------------------------- Hypothetical (h) 1.50% $1,000.00 $1,017.64 $7.63 - -------------------------------------------------------------------------------- Actual 2.08% $1,000.00 $1,002.30 $10.50 R1 ----------------------------------------------------------------------- Hypothetical (h) 2.08% $1,000.00 $1,014.72 $10.56 - -------------------------------------------------------------------------------- Actual 1.74% $1,000.00 $1,004.70 $8.79 R2 ----------------------------------------------------------------------- Hypothetical (h) 1.74% $1,000.00 $1,016.43 $8.84 - -------------------------------------------------------------------------------- Actual 1.65% $1,000.00 $1,005.00 $8.34 R3 ----------------------------------------------------------------------- Hypothetical (h) 1.65% $1,000.00 $1,016.89 $8.39 - -------------------------------------------------------------------------------- Actual 1.38% $1,000.00 $1,006.10 $6.98 R4 ----------------------------------------------------------------------- Hypothetical (h) 1.38% $1,000.00 $1,018.25 $7.02 - -------------------------------------------------------------------------------- Actual 1.09% $1,000.00 $1,007.70 $5.52 R5 ----------------------------------------------------------------------- Hypothetical (h) 1.09% $1,000.00 $1,019.71 $5.55 - -------------------------------------------------------------------------------- (h) 5% class return per year before expenses. (p) Expenses paid is equal to each class' annualized expense ratio, as shown above, multiplied by the average account value over the period, multiplied by the number of days in the period, divided by the number of days in the year. Expenses paid do not include any applicable sales charges (loads) or redemption fees. If these transaction costs had been included, your costs would have been higher. PORTFOLIO OF INVESTMENTS 8/31/06 The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes. Common Stocks - 99.1% - ------------------------------------------------------------------------------------------------------------- ISSUER SHARES/PAR VALUE ($) - ------------------------------------------------------------------------------------------------------------- Aerospace - 2.6% - ------------------------------------------------------------------------------------------------------------- Lockheed Martin Corp. 47,810 $ 3,949,106 United Technologies Corp. 38,350 2,404,929 --------------- $ 6,354,035 - ------------------------------------------------------------------------------------------------------------- Apparel Manufacturers - 1.2% - ------------------------------------------------------------------------------------------------------------- NIKE, Inc., "B" 37,670 $ 3,042,229 - ------------------------------------------------------------------------------------------------------------- Automotive - 0.7% - ------------------------------------------------------------------------------------------------------------- Harley-Davidson, Inc. 6,270 $ 366,858 Johnson Controls, Inc. 18,820 1,353,723 --------------- $ 1,720,581 - ------------------------------------------------------------------------------------------------------------- Biotechnology - 2.6% - ------------------------------------------------------------------------------------------------------------- Amgen, Inc. (n) 34,340 $ 2,332,716 Genzyme Corp. (n) 12,690 840,459 Human Genome Sciences, Inc. (l)(n) 69,490 780,373 ImClone Systems, Inc. (l)(n) 23,530 703,547 Millipore Corp. (n) 12,600 808,668 Neurochem, Inc. (n) 51,550 917,075 --------------- $ 6,382,838 - ------------------------------------------------------------------------------------------------------------- Broadcasting - 2.1% - ------------------------------------------------------------------------------------------------------------- News Corp., "A" 137,920 $ 2,624,618 Viacom, Inc., "B" (n) 69,780 2,533,014 --------------- $ 5,157,632 - ------------------------------------------------------------------------------------------------------------- Brokerage & Asset Managers - 2.5% - ------------------------------------------------------------------------------------------------------------- Affiliated Managers Group, Inc. (l)(n) 6,990 $ 646,785 Chicago Mercantile Exchange Holdings, Inc. 2,040 897,600 Franklin Resources, Inc. 4,880 480,241 Goldman Sachs Group, Inc. 7,450 1,107,443 Legg Mason, Inc. (l) 25,520 2,328,955 MarketAxess Holdings, Inc. (l)(n) 89,360 841,771 --------------- $ 6,302,795 - ------------------------------------------------------------------------------------------------------------- Business Services - 1.0% - ------------------------------------------------------------------------------------------------------------- CheckFree Corp. (n) 13,610 $ 487,238 Cognizant Technology Solutions Corp., "A" (n) 9,680 676,729 First Data Corp. 16,330 701,700 Ultimate Software Group, Inc. (n) 25,530 576,978 --------------- $ 2,442,645 - ------------------------------------------------------------------------------------------------------------- Cable TV - 0.7% - ------------------------------------------------------------------------------------------------------------- Comcast Corp., "Special A" (n) 34,660 $ 1,209,981 EchoStar Communications Corp., "A" (n) 18,790 596,583 --------------- $ 1,806,564 - ------------------------------------------------------------------------------------------------------------- Chemicals - 1.3% - ------------------------------------------------------------------------------------------------------------- Monsanto Co. 66,730 $ 3,165,671 - ------------------------------------------------------------------------------------------------------------- Computer Software - 3.5% - ------------------------------------------------------------------------------------------------------------- Adobe Systems, Inc. (n) 63,430 $ 2,057,669 FileNet Corp. (n) 30,740 1,074,056 Salesforce.com, Inc. (l)(n) 71,500 2,465,320 TIBCO Software, Inc. (n) 375,880 2,954,417 --------------- $ 8,551,462 - ------------------------------------------------------------------------------------------------------------- Computer Software - Systems - 3.6% - ------------------------------------------------------------------------------------------------------------- Apple Computer, Inc. (n) 43,900 $ 2,978,615 Hewlett-Packard Co. 150,930 5,518,001 Satyam Computer Services Ltd., ADR (l) 9,640 367,959 --------------- $ 8,864,575 - ------------------------------------------------------------------------------------------------------------- Construction - 0.7% - ------------------------------------------------------------------------------------------------------------- D.R. Horton, Inc. 17,300 $ 379,389 Masco Corp. (l) 48,960 1,341,994 --------------- $ 1,721,383 - ------------------------------------------------------------------------------------------------------------- Consumer Goods & Services - 3.1% - ------------------------------------------------------------------------------------------------------------- Avon Products, Inc. 45,440 $ 1,304,582 DTS, Inc. (l)(n) 22,050 405,279 eBay, Inc. (n) 31,140 867,560 Estee Lauder Cos., Inc., "A" 37,390 1,378,195 ITT Educational Services, Inc. (n) 2,810 185,713 Monster Worldwide, Inc. (n) 15,180 618,433 Scotts Miracle-Gro Co. (l) 58,830 2,524,984 Strayer Education, Inc. 2,540 267,716 --------------- $ 7,552,462 - ------------------------------------------------------------------------------------------------------------- Containers - 0.3% - ------------------------------------------------------------------------------------------------------------- Crown Holdings, Inc. (n) 44,850 $ 824,792 - ------------------------------------------------------------------------------------------------------------- Electrical Equipment - 1.4% - ------------------------------------------------------------------------------------------------------------- MSC Industrial Direct Co., Inc., "A" 8,000 $ 314,880 Rockwell Automation, Inc. 37,980 2,141,312 Tyco International Ltd. 36,460 953,429 --------------- $ 3,409,621 - ------------------------------------------------------------------------------------------------------------- Electronics - 4.3% - ------------------------------------------------------------------------------------------------------------- Applied Materials, Inc. (l) 47,430 $ 800,618 Intel Corp. 171,560 3,352,282 Marvell Technology Group Ltd. (n) 59,900 1,048,849 SanDisk Corp. (n) 42,170 2,484,656 Tessera Technologies, Inc. (l)(n) 52,130 1,715,077 Varian Semiconductor Equipment Associates, Inc. (l)(n) 20,405 720,501 Volterra Semiconductor Corp. (l)(n) 39,410 594,303 --------------- $ 10,716,286 - ------------------------------------------------------------------------------------------------------------- Energy - Independent - 1.8% - ------------------------------------------------------------------------------------------------------------- Apache Corp. 14,590 $ 952,435 CONSOL Energy, Inc. 13,680 498,910 Devon Energy Corp. 18,210 1,137,943 EOG Resources, Inc. 19,450 1,260,749 Occidental Petroleum Corp. 12,380 631,256 --------------- $ 4,481,293 - ------------------------------------------------------------------------------------------------------------- Energy - Integrated - 5.3% - ------------------------------------------------------------------------------------------------------------- Chevron Corp. 56,510 $ 3,639,244 Exxon Mobil Corp. 121,372 8,213,243 Hess Corp. 25,670 1,175,173 --------------- $ 13,027,660 - ------------------------------------------------------------------------------------------------------------- Food & Beverages - 1.4% - ------------------------------------------------------------------------------------------------------------- Diamond Foods, Inc. (l) 78,913 $ 1,178,171 General Mills, Inc. 19,140 1,037,962 PepsiCo, Inc. 8,909 581,580 Tyson Foods, Inc., "A" 41,880 616,892 --------------- $ 3,414,605 - ------------------------------------------------------------------------------------------------------------- Food & Drug Stores - 1.1% - ------------------------------------------------------------------------------------------------------------- CVS Corp. 40,100 $ 1,345,355 Kroger Co. 30,110 716,919 Walgreen Co. 14,070 695,902 --------------- $ 2,758,176 - ------------------------------------------------------------------------------------------------------------- Forest & Paper Products - 0.4% - ------------------------------------------------------------------------------------------------------------- Abitibi-Consolidated, Inc. (l) 331,020 $ 893,754 - ------------------------------------------------------------------------------------------------------------- Gaming & Lodging - 1.0% - ------------------------------------------------------------------------------------------------------------- Global Cash Access Holdings, Inc. (n) 31,650 $ 488,360 Hilton Hotels Corp. 13,970 355,816 International Game Technology 10,300 398,404 Las Vegas Sands Corp. (n) 4,880 340,673 Penn National Gaming, Inc. (n) 6,240 206,669 Shuffle Master, Inc. (l)(n) 11,150 310,304 Station Casinos, Inc. (l) 8,620 502,115 --------------- $ 2,602,341 - ------------------------------------------------------------------------------------------------------------- General Merchandise - 1.1% - ------------------------------------------------------------------------------------------------------------- Kohl's Corp. (n) 28,260 $ 1,766,533 Stage Stores, Inc. 36,500 962,140 --------------- $ 2,728,673 - ------------------------------------------------------------------------------------------------------------- Health Maintenance Organizations - 1.3% - ------------------------------------------------------------------------------------------------------------- UnitedHealth Group, Inc. 25,840 $ 1,342,388 WellPoint, Inc. (n) 23,630 1,829,198 --------------- $ 3,171,586 - ------------------------------------------------------------------------------------------------------------- Insurance - 4.5% - ------------------------------------------------------------------------------------------------------------- Ace Ltd. 40,250 $ 2,167,865 AFLAC, Inc. 22,420 1,010,469 Chubb Corp. 35,060 1,758,610 Endurance Specialty Holdings Ltd. 34,320 1,107,506 Genworth Financial, Inc., "A" 42,620 1,467,407 MetLife, Inc. 30,220 1,663,007 St. Paul Travelers Cos., Inc. 44,030 1,932,917 --------------- $ 11,107,781 - ------------------------------------------------------------------------------------------------------------- Internet - 1.0% - ------------------------------------------------------------------------------------------------------------- CNET Networks, Inc. (l)(n) 71,080 $ 670,284 Google, Inc., "A" (n) 3,370 1,275,646 Yahoo!, Inc. (n) 21,270 613,001 --------------- $ 2,558,931 - ------------------------------------------------------------------------------------------------------------- Leisure & Toys - 0.4% - ------------------------------------------------------------------------------------------------------------- Electronic Arts, Inc. (n) 9,560 $ 487,273 THQ, Inc. (l)(n) 15,680 404,544 --------------- $ 891,817 - ------------------------------------------------------------------------------------------------------------- Machinery & Tools - 1.8% - ------------------------------------------------------------------------------------------------------------- Deere & Co. 32,330 $ 2,524,973 Eaton Corp. 18,710 1,244,215 Gardner Denver, Inc. (n) 17,030 612,569 --------------- $ 4,381,757 - ------------------------------------------------------------------------------------------------------------- Major Banks - 4.9% - ------------------------------------------------------------------------------------------------------------- Bank of America Corp. 107,524 $ 5,534,260 Bank of New York Co., Inc. 81,890 2,763,788 PNC Financial Services Group, Inc. 34,210 2,421,726 SunTrust Banks, Inc. 19,850 1,516,540 --------------- $ 12,236,314 - ------------------------------------------------------------------------------------------------------------- Medical & Health Technology & Services - 1.5% - ------------------------------------------------------------------------------------------------------------- Allion Healthcare, Inc. (l)(n) 138,610 $ 602,953 AMICAS, Inc. (l)(n) 104,910 339,908 Cardinal Health, Inc. 9,180 618,916 Caremark Rx, Inc. 17,250 999,465 Healthcare Services Group, Inc. (l) 37,680 854,959 McKesson Corp. 6,700 340,360 --------------- $ 3,756,561 - ------------------------------------------------------------------------------------------------------------- Medical Equipment - 2.0% - ------------------------------------------------------------------------------------------------------------- Advanced Medical Optics, Inc. (l)(n) 9,530 $ 458,869 Aspect Medical Systems, Inc. (l)(n) 35,350 682,962 Baxter International, Inc. 22,840 1,013,639 Boston Scientific Corp. (n) 44,460 775,382 Medtronic, Inc. 11,080 519,652 St. Jude Medical, Inc. (n) 21,450 780,995 Thoratec Corp. (n) 55,120 808,059 --------------- $ 5,039,558 - ------------------------------------------------------------------------------------------------------------- Metals & Mining - 0.9% - ------------------------------------------------------------------------------------------------------------- BHP Billiton PLC 90,030 $ 1,716,696 Inmet Mining Corp. 11,070 465,989 --------------- $ 2,182,685 - ------------------------------------------------------------------------------------------------------------- Natural Gas - Pipeline - 0.9% - ------------------------------------------------------------------------------------------------------------- Williams Cos., Inc. 87,150 $ 2,146,505 - ------------------------------------------------------------------------------------------------------------- Network & Telecom - 2.2% - ------------------------------------------------------------------------------------------------------------- Cisco Systems, Inc. (n) 83,860 $ 1,844,081 Juniper Networks, Inc. (n) 121,800 1,786,806 NICE Systems Ltd., ADR (n) 38,750 967,200 Nortel Networks Corp. (n) 441,950 923,675 --------------- $ 5,521,762 - ------------------------------------------------------------------------------------------------------------- Oil Services - 1.2% - ------------------------------------------------------------------------------------------------------------- Cameron International Corp. (n) 7,150 $ 342,556 Dresser-Rand Group, Inc. (l)(n) 33,590 686,915 GlobalSantaFe Corp. 18,140 892,851 National-Oilwell Varco, Inc. (n) 6,140 400,942 Noble Corp. 9,130 597,011 --------------- $ 2,920,275 - ------------------------------------------------------------------------------------------------------------- Other Banks & Diversified Financials - 6.9% - ------------------------------------------------------------------------------------------------------------- American Express Co. 62,930 $ 3,306,342 Commerce Bancorp, Inc. (l) 49,830 1,659,837 Countrywide Financial Corp. 92,890 3,139,682 Fannie Mae 36,940 1,944,891 Investors Financial Services Corp. (l) 53,790 2,493,704 JPMorgan Chase & Co. 36,100 1,648,326 SLM Corp. 61,440 2,981,683 --------------- $ 17,174,465 - ------------------------------------------------------------------------------------------------------------- Personal Computers & Peripherals - 0.1% - ------------------------------------------------------------------------------------------------------------- Nuance Communications, Inc. (l)(n) 46,850 $ 367,772 - ------------------------------------------------------------------------------------------------------------- Pharmaceuticals - 5.7% - ------------------------------------------------------------------------------------------------------------- Allergan, Inc. 16,180 $ 1,853,581 Eli Lilly & Co. 49,330 2,759,027 Endo Pharmaceuticals Holdings, Inc. (n) 19,480 643,424 Johnson & Johnson 59,730 3,862,142 Medicis Pharmaceutical Corp., "A" (l) 12,310 360,560 Merck & Co., Inc. 64,310 2,607,771 Wyeth 40,280 1,961,636 --------------- $ 14,048,141 - ------------------------------------------------------------------------------------------------------------- Printing & Publishing - 0.6% - ------------------------------------------------------------------------------------------------------------- New York Times Co., "A" (l) 63,990 $ 1,441,055 - ------------------------------------------------------------------------------------------------------------- Railroad & Shipping - 0.6% - ------------------------------------------------------------------------------------------------------------- Burlington Northern Santa Fe Corp. 16,170 $ 1,082,581 Norfolk Southern Corp. 11,230 479,858 --------------- $ 1,562,439 - ------------------------------------------------------------------------------------------------------------- Real Estate - 2.4% - ------------------------------------------------------------------------------------------------------------- BRE Properties, Inc., "A", REIT 16,990 $ 1,003,939 Equity Office Properties Trust, REIT 32,400 1,201,716 Maguire Properties, Inc., REIT 33,310 1,329,402 Simon Property Group, Inc., REIT 14,290 1,211,649 Taubman Centers, Inc., REIT 29,600 1,192,584 --------------- $ 5,939,290 - ------------------------------------------------------------------------------------------------------------- Restaurants - 0.9% - ------------------------------------------------------------------------------------------------------------- Applebee's International, Inc. 16,600 $ 344,450 Red Robin Gourmet Burgers, Inc. (l)(n) 12,620 532,690 Texas Roadhouse, Inc. (l)(n) 41,430 500,474 YUM! Brands, Inc. 16,470 805,054 --------------- $ 2,182,668 - ------------------------------------------------------------------------------------------------------------- Specialty Chemicals - 2.5% - ------------------------------------------------------------------------------------------------------------- NuCO2, Inc. (l)(n) 59,230 $ 1,614,018 Praxair, Inc. 79,260 4,550,317 --------------- $ 6,164,335 - ------------------------------------------------------------------------------------------------------------- Specialty Stores - 2.4% - ------------------------------------------------------------------------------------------------------------- Advance Auto Parts, Inc. 29,240 $ 880,709 Aeropostale, Inc. (n) 40,880 1,038,352 Chico's FAS, Inc. (n) 23,530 433,893 Home Depot, Inc. 59,350 2,035,111 PetSmart, Inc. 36,280 910,628 Urban Outfitters, Inc. (l)(n) 20,190 316,781 Williams-Sonoma, Inc. 12,760 375,910 --------------- $ 5,991,384 - ------------------------------------------------------------------------------------------------------------- Telecommunications - Wireless - 0.8% - ------------------------------------------------------------------------------------------------------------- Global Signal, Inc., REIT 6,900 $ 331,200 Rogers Communications, Inc., "B" 32,020 1,652,234 --------------- $ 1,983,434 - ------------------------------------------------------------------------------------------------------------- Telephone Services - 2.4% - ------------------------------------------------------------------------------------------------------------- AT&T, Inc. 76,730 $ 2,388,605 Embarq Corp. 8,021 378,190 Sprint Nextel Corp. 44,530 753,448 TELUS Corp. (non-voting shares) 50,580 2,412,125 --------------- $ 5,932,368 - ------------------------------------------------------------------------------------------------------------- Tobacco - 3.2% - ------------------------------------------------------------------------------------------------------------- Altria Group, Inc. 94,400 $ 7,885,232 - ------------------------------------------------------------------------------------------------------------- Trucking - 1.0% - ------------------------------------------------------------------------------------------------------------- FedEx Corp. 11,020 $ 1,113,351 UTi Worldwide, Inc. 62,130 1,432,096 --------------- $ 2,545,447 - ------------------------------------------------------------------------------------------------------------- Utilities - Electric Power - 3.3% - ------------------------------------------------------------------------------------------------------------- Dominion Resources, Inc. 13,320 $ 1,064,135 Duke Energy Corp. 39,380 1,181,400 Edison International 15,020 655,473 Exelon Corp. 24,490 1,493,400 FPL Group, Inc. 31,550 1,402,398 NRG Energy, Inc. (n) 25,710 1,301,954 TXU Corp. 16,650 1,102,397 --------------- $ 8,201,157 - ------------------------------------------------------------------------------------------------------------- TOTAL COMMON STOCKS (IDENTIFIED COST, $232,696,967) $ 245,256,792 - ------------------------------------------------------------------------------------------------------------- Collateral for Securities Loaned - 11.3% - ------------------------------------------------------------------------------------------------------------- Navigator Securities Lending Prime Portfolio, at Cost and Net Asset Value 27,899,818 $ 27,899,818 - ------------------------------------------------------------------------------------------------------------- TOTAL INVESTMENTS (IDENTIFIED COST, $260,596,785) $ 273,156,610 - ------------------------------------------------------------------------------------------------------------- Other Assets, Less Liabilities - (10.4)% (25,671,472) - ------------------------------------------------------------------------------------------------------------- NET ASSETS - 100.0% $ 247,485,138 - ------------------------------------------------------------------------------------------------------------- (l) All or a portion of this security is on loan. (n) Non-income producing security. The following abbreviations are used in this report and are defined: ADR American Depository Receipt REIT Real Estate Investment Trust SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENT OF ASSETS AND LIABILITIES At 8/31/06 This statement represents your fund's balance sheet, which details the assets and liabilities comprising the total value of the fund. ASSETS - ------------------------------------------------------------------------------------------------------ Investments, at value, including $27,144,092 of securities on loan (identified cost, $260,596,785) $273,156,610 Receivable for investments sold 4,958,122 Receivable for fund shares sold 131,114 Interest and dividends receivable 392,545 Other assets 1,471 - ------------------------------------------------------------------------------------------------------ Total assets $278,639,862 - ------------------------------------------------------------------------------------------------------ LIABILITIES - ------------------------------------------------------------------------------------------------------ Payable to custodian $245,714 Payable for investments purchased 2,376,305 Payable for fund shares reacquired 447,817 Collateral for securities loaned, at value 27,899,818 Payable to affiliates Management fee 8,818 Shareholder servicing costs 31,841 Distribution and service fees 6,948 Administrative services fee 285 Retirement plan administration and services fees 215 Payable for independent trustees' compensation 35,862 Accrued expenses and other liabilities 101,101 - ------------------------------------------------------------------------------------------------------ Total liabilities $31,154,724 - ------------------------------------------------------------------------------------------------------ Net assets $247,485,138 - ------------------------------------------------------------------------------------------------------ NET ASSETS CONSIST OF - ------------------------------------------------------------------------------------------------------ Paid-in capital $219,926,729 Unrealized appreciation (depreciation) on investments and translation of assets and liabilities in foreign currencies 12,559,864 Accumulated net realized gain (loss) on investments and foreign currency transactions 15,034,346 Accumulated net investment loss (35,801) - ------------------------------------------------------------------------------------------------------ Net assets $247,485,138 - ------------------------------------------------------------------------------------------------------ Shares of beneficial interest outstanding 13,837,008 - ------------------------------------------------------------------------------------------------------ Statement of Assets and Liabilities - continued Class A shares - ------------------------------------------------------------------------------------------------------ Net assets $146,354,701 Shares outstanding 8,053,387 - ------------------------------------------------------------------------------------------------------ Net asset value per share $18.17 - ------------------------------------------------------------------------------------------------------ Offering price per share (100/94.25Xnet asset value per share) $19.28 - ------------------------------------------------------------------------------------------------------ Class B shares - ------------------------------------------------------------------------------------------------------ Net assets $49,191,974 Shares outstanding 2,867,404 - ------------------------------------------------------------------------------------------------------ Net asset value and offering price per share $17.16 - ------------------------------------------------------------------------------------------------------ Class C shares - ------------------------------------------------------------------------------------------------------ Net assets $16,613,264 Shares outstanding 972,226 - ------------------------------------------------------------------------------------------------------ Net asset value and offering price per share $17.09 - ------------------------------------------------------------------------------------------------------ Class I shares - ------------------------------------------------------------------------------------------------------ Net assets $4,762,609 Shares outstanding 254,469 - ------------------------------------------------------------------------------------------------------ Net asset value, offering price, and redemption price per share $18.72 - ------------------------------------------------------------------------------------------------------ Class R shares - ------------------------------------------------------------------------------------------------------ Net assets $5,446,248 Shares outstanding 301,496 - ------------------------------------------------------------------------------------------------------ Net asset value, offering price, and redemption price per share $18.06 - ------------------------------------------------------------------------------------------------------ Class R1 shares - ------------------------------------------------------------------------------------------------------ Net assets $440,881 Shares outstanding 25,763 - ------------------------------------------------------------------------------------------------------ Net asset value, offering price, and redemption price per share $17.11 - ------------------------------------------------------------------------------------------------------ Class R2 shares - ------------------------------------------------------------------------------------------------------ Net assets $779,880 Shares outstanding 45,332 - ------------------------------------------------------------------------------------------------------ Net asset value, offering price, and redemption price per share $17.20 - ------------------------------------------------------------------------------------------------------ Class R3 shares - ------------------------------------------------------------------------------------------------------ Net assets $1,193,191 Shares outstanding 66,417 - ------------------------------------------------------------------------------------------------------ Net asset value, offering price, and redemption price per share $17.97 - ------------------------------------------------------------------------------------------------------ Statement of Assets and Liabilities - continued Class R4 shares - ------------------------------------------------------------------------------------------------------ Net assets $22,646,378 Shares outstanding 1,247,443 - ------------------------------------------------------------------------------------------------------ Net asset value, offering price, and redemption price per share $18.15 - ------------------------------------------------------------------------------------------------------ Class R5 shares - ------------------------------------------------------------------------------------------------------ Net assets $56,012 Shares outstanding 3,071 - ------------------------------------------------------------------------------------------------------ Net asset value, offering price, and redemption price per share $18.24 - ------------------------------------------------------------------------------------------------------ On sales of $50,000 or more, the offering price of Class A shares is reduced. A contingent deferred sales charge may be imposed on redemptions of Class A, Class B, and Class C shares. SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENT OF OPERATIONS Year ended 8/31/06 This statement describes how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations. NET INVESTMENT LOSS - ------------------------------------------------------------------------------------------------------ Income Dividends $3,624,916 Interest 146,294 Foreign taxes withheld (10,603) - ------------------------------------------------------------------------------------------------------ Total investment income $3,760,607 - ------------------------------------------------------------------------------------------------------ Expenses Management fee $1,618,769 Distribution and service fees 1,376,576 Shareholder servicing costs 440,113 Administrative services fee 42,393 Retirement plan administration and services fees 17,503 Independent trustees' compensation 11,355 Custodian fee 106,915 Shareholder communications 54,664 Auditing fees 48,614 Legal fees 7,160 Miscellaneous 195,873 - ------------------------------------------------------------------------------------------------------ Total expenses $3,919,935 - ------------------------------------------------------------------------------------------------------ Fees paid indirectly (20,067) Reduction of expenses by investment adviser (3,362) - ------------------------------------------------------------------------------------------------------ Net expenses $3,896,506 - ------------------------------------------------------------------------------------------------------ Net investment loss $(135,899) - ------------------------------------------------------------------------------------------------------ Statement of Operations - continued REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS - ------------------------------------------------------------------------------------------------------ Realized gain (loss) (identified cost basis) Investment transactions $22,222,083 Foreign currency transactions (11,290) - ------------------------------------------------------------------------------------------------------ Net realized gain (loss) on investments and foreign currency transactions $22,210,793 - ------------------------------------------------------------------------------------------------------ Change in unrealized appreciation (depreciation) Investments $(8,617,425) Translation of assets and liabilities in foreign currencies (67) - ------------------------------------------------------------------------------------------------------ Net unrealized gain (loss) on investments and foreign currency translation $(8,617,492) - ------------------------------------------------------------------------------------------------------ Net realized and unrealized gain (loss) on investments and foreign currency $13,593,301 - ------------------------------------------------------------------------------------------------------ Change in net assets from operations $13,457,402 - ------------------------------------------------------------------------------------------------------ SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENTS OF CHANGES IN NET ASSETS These statements describe the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions. YEARS ENDED 8/31 ---------------------------------- 2006 2005 CHANGE IN NET ASSETS FROM OPERATIONS - ------------------------------------------------------------------------------------------------------ Net investment loss $(135,899) $(243,156) Net realized gain (loss) on investments and foreign currency transactions 22,210,793 17,758,149 Net unrealized gain (loss) on investments and foreign currency translation (8,617,492) 9,020,319 - ------------------------------------------------------------------------------------------------------ Change in net assets from operations $13,457,402 $26,535,312 - ------------------------------------------------------------------------------------------------------ DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------ From net realized gain on investments and foreign currency transactions Class A $(6,566,925) $-- Class B (3,172,137) -- Class C (835,667) -- Class I (151,657) -- Class R (292,512) -- Class R1 (6,519) -- Class R2 (2,469) -- Class R3 (54,897) -- Class R4 (2,358) -- Class R5 (2,358) -- - ------------------------------------------------------------------------------------------------------ Total distributions declared to shareholders $(11,087,499) $-- - ------------------------------------------------------------------------------------------------------ Change in net assets from fund share transactions $4,102,717 $53,568,852 - ------------------------------------------------------------------------------------------------------ Redemption fees $-- $2,690 - ------------------------------------------------------------------------------------------------------ Total change in net assets $6,472,620 $80,106,854 - ------------------------------------------------------------------------------------------------------ NET ASSETS - ------------------------------------------------------------------------------------------------------ At beginning of period 241,012,518 160,905,664 At end of period (including accumulated net investment loss of $35,801 and $35,991, respectively) $247,485,138 $241,012,518 - ------------------------------------------------------------------------------------------------------ SEE NOTES TO FINANCIAL STATEMENTS Financial Statements FINANCIAL HIGHLIGHTS The financial highlights table is intended to help you understand the fund's financial performance for the past 5 years (or life of a particular share class, if shorter). Certain information reflects financial results for a single fund share. The total returns in the table represent the rate by which an investor would have earned (or lost) on an investment in the fund share class (assuming reinvestment of all distributions) held for the entire period. This information has been audited by the fund's independent registered public accounting firm, whose report, together with the fund's financial statements, are included in this report. CLASS A YEARS ENDED 8/31 ---------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $17.88 $15.35 $13.97 $12.51 $15.15 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.03 $0.03 $0.03 $0.04 $0.00(w) Net realized and unrealized gain (loss) on investments and foreign currency 1.06 2.50 1.35 1.42 (2.38) - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $1.09 $2.53 $1.38 $1.46 $(2.38) - -------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - -------------------------------------------------------------------------------------------------------------------------- From net realized gain on investments and foreign currency transactions $(0.80) $-- $-- $-- $(0.26) - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $18.17 $17.88 $15.35 $13.97 $12.51 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 6.25 16.48 9.88(b) 11.67 (16.00) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.37 1.41 1.38 1.47 1.37 Expenses after expense reductions (f) 1.36 1.41 1.38 N/A N/A Net investment income 0.15 0.17 0.22 0.29 0.03 Portfolio turnover 138 81 116 121 100 Net assets at end of period (000 Omitted) $146,355 $141,808 $67,415 $53,704 $50,366 - -------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS B YEARS ENDED 8/31 -------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $17.03 $14.71 $13.48 $12.14 $14.81 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.09) $(0.08) $(0.06) $(0.04) $(0.09) Net realized and unrealized gain (loss) on investments and foreign currency 1.02 2.40 1.29 1.38 (2.32) - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.93 $2.32 $1.23 $1.34 $(2.41) - -------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - -------------------------------------------------------------------------------------------------------------------------- From net realized gain on investments and foreign currency transactions $(0.80) $-- $-- $-- $(0.26) - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $17.16 $17.03 $14.71 $13.48 $12.14 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 5.60 15.77 9.12(b) 11.04 (16.57) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.02 2.06 2.02 2.12 2.02 Expenses after expense reductions (f) 2.02 2.06 2.02 N/A N/A Net investment loss (0.50) (0.47) (0.43) (0.36) (0.62) Portfolio turnover 138 81 116 121 100 Net assets at end of period (000 Omitted) $49,192 $71,088 $73,395 $75,007 $73,146 - -------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS C YEARS ENDED 8/31 -------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $16.97 $14.66 $13.43 $12.10 $14.76 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.09) $(0.08) $(0.06) $(0.04) $(0.09) Net realized and unrealized gain (loss) on investments and foreign currency 1.01 2.39 1.29 1.37 (2.31) - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.92 $2.31 $1.23 $1.33 $(2.40) - -------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - -------------------------------------------------------------------------------------------------------------------------- From net realized gain on investments and foreign currency transactions $(0.80) $-- $-- $-- $(0.26) - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $17.09 $16.97 $14.66 $13.43 $12.10 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 5.56 15.76 9.16(b) 10.99 (16.56) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.02 2.06 2.02 2.12 2.02 Expenses after expense reductions (f) 2.02 2.06 2.02 N/A N/A Net investment loss (0.50) (0.48) (0.43) (0.35) (0.62) Portfolio turnover 138 81 116 121 100 Net assets at end of period (000 Omitted) $16,613 $17,898 $15,990 $15,325 $17,521 - -------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS I YEARS ENDED 8/31 -------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $18.33 $15.68 $14.22 $12.69 $15.31 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.09 $0.09 $0.09 $0.08 $0.06 Net realized and unrealized gain (loss) on investments and foreign currency 1.10 2.56 1.37 1.45 (2.42) - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $1.19 $2.65 $1.46 $1.53 $(2.36) - -------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - -------------------------------------------------------------------------------------------------------------------------- From net realized gain on investments and foreign currency transactions $(0.80) $-- $-- $-- $(0.26) - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $18.72 $18.33 $15.68 $14.22 $12.69 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 6.66 16.90 10.27(b) 12.06 (15.70) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.01 1.09 1.03 1.12 1.02 Expenses after expense reductions (f) 1.01 1.09 1.03 N/A N/A Net investment income 0.50 0.51 0.56 0.65 0.38 Portfolio turnover 138 81 116 121 100 Net assets at end of period (000 Omitted) $4,763 $3,170 $460 $398 $428 - -------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R YEARS ENDED 8/31 ------------------------------------------------------------- 2006 2005 2004 2003(i) Net asset value, beginning of period $17.80 $15.31 $13.96 $11.98 - ------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------------------- Net investment income (loss) (d) $0.00(w) $0.00(w) $0.02 $(0.00)(w) Net realized and unrealized gain (loss) on investments and foreign currency 1.06 2.49 1.33 1.98(g) - ------------------------------------------------------------------------------------------------------------------------- Total from investment operations $1.06 $2.49 $1.35 $1.98 - ------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------------------- From net realized gain on investments and foreign currency transactions $(0.80) $-- $-- $-- - ------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $18.06 $17.80 $15.31 $13.96 - ------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 6.11 16.26 9.67(b) 16.53(n) - ------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.51 1.56 1.49 1.74(a) Expenses after expense reductions (f) 1.51 1.56 1.49 N/A Net investment income (loss) 0.00(w) 0.03 0.13 (0.04)(a) Portfolio turnover 138 81 116 121 Net assets at end of period (000 Omitted) $5,446 $5,888 $3,030 $17 - ------------------------------------------------------------------------------------------------------------------------- CLASS R1 YEARS ENDED 8/31 ------------------------------- 2006 2005(i) Net asset value, beginning of period $17.01 $16.25 - ------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.10) $(0.04) Net realized and unrealized gain (loss) on investments and foreign currency 1.00 0.80(g) - ------------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.90 $0.76 - ------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------------------- From net realized gain on investments and foreign currency transactions $(0.80) $-- - ------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $17.11 $17.01 - ------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 5.43 4.68(n) - ------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.20 2.23(a) Expenses after expense reductions (f) 2.11 2.23(a) Net investment loss (0.61) (0.63)(a) Portfolio turnover 138 81 Net assets at end of period (000 Omitted) $441 $55 - ------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R2 YEARS ENDED 8/31 ------------------------------- 2006 2005(i) Net asset value, beginning of period $17.03 $16.25 - --------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - --------------------------------------------------------------------------------------------------------------------- Net investment loss (d) $(0.05) $(0.02) Net realized and unrealized gain (loss) on investments and foreign currency 1.02 0.80(g) - --------------------------------------------------------------------------------------------------------------------- Total from investment operations $0.97 $0.78 - --------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - --------------------------------------------------------------------------------------------------------------------- From net realized gain on investments and foreign currency transactions $(0.80) $-- - --------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $17.20 $17.03 - --------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 5.85 4.80(n) - --------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - --------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.90 1.93(a) Expenses after expense reductions (f) 1.75 1.93(a) Net investment loss (0.29) (0.33)(a) Portfolio turnover 138 81 Net assets at end of period (000 Omitted) $780 $52 - --------------------------------------------------------------------------------------------------------------------- CLASS R3 YEARS ENDED 8/31 ----------------------------------------------- 2006 2005 2004(i) Net asset value, beginning of period $17.74 $15.29 $14.57 - --------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - --------------------------------------------------------------------------------------------------------------------- Net investment income (loss) (d) $(0.03) $(0.04) $0.03 Net realized and unrealized gain (loss) on investments and foreign currency 1.06 2.49 0.69(g) - --------------------------------------------------------------------------------------------------------------------- Total from investment operations $1.03 $2.45 $0.72 - --------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - --------------------------------------------------------------------------------------------------------------------- From net realized gain on investments and foreign currency transactions $(0.80) $-- $-- - --------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $17.97 $17.74 15.29 - --------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 5.96 16.02 4.94(b)(n) - --------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - --------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.77 1.81 1.80(a) Expenses after expense reductions (f) 1.67 1.81 1.80(a) Net investment income (loss) (0.15) (0.22) 0.27(a) Portfolio turnover 138 81 116 Net assets at end of period (000 Omitted) $1,193 $948 $616 - --------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R4 YEARS ENDED 8/31 ------------------------------- 2006 2005(i) Net asset value, beginning of period $17.88 $17.02 - ------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.05 $0.01 Net realized and unrealized gain (loss) on investments and foreign currency 1.02 0.85(g) - ------------------------------------------------------------------------------------------------------------- Total from investment operations $1.07 $0.86 - ------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------- From net realized gain on investments and foreign currency transactions $(0.80) $-- - ------------------------------------------------------------------------------------------------------------- Net asset value, end of period $18.15 $17.88 - ------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 6.14 5.05(n) - ------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.37 1.43(a) Expenses after expense reductions (f) 1.37 1.43(a) Net investment income 0.27 0.17(a) Portfolio turnover 138 81 Net assets at end of period (000 Omitted) $22,646 $53 - ------------------------------------------------------------------------------------------------------------- CLASS R5 YEARS ENDED 8/31 ------------------------------- 2006 2005(i) Net asset value, beginning of period $17.90 $17.02 - ------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.07 $0.03 Net realized and unrealized gain (loss) on investments and foreign currency 1.07 0.85(g) - ------------------------------------------------------------------------------------------------------------- Total from investment operations $1.14 $0.88 - ------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------- From net realized gain on investments and foreign currency transactions $(0.80) $-- - ------------------------------------------------------------------------------------------------------------- Net asset value, end of period $18.24 $17.90 - ------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 6.54 5.17(n) - ------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.12 1.13(a) Expenses after expense reductions (f) 1.12 1.13(a) Net investment income 0.40 0.47(a) Portfolio turnover 138 81 Net assets at end of period (000 Omitted) $56 $53 - ------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued Any redemption fees charged by the fund during the 2004 and 2005 fiscal years resulted in a per share impact of less than $0.01. (a) Annualized. (b) The fund's net asset value and total return calculation include a non-recurring accrual recorded as a result of an administrative proceeding regarding disclosure of brokerage allocation practices in connection with fund sales. The non-recurring accrual did not have a material impact on the net asset value per share based on the shares outstanding on the day the proceeds were recorded. (d) Per share data are based on average shares outstanding. (f) Ratios do not reflect reductions from fees paid indirectly. (g) The per share amount is not in accordance with the net realized and unrealized gain/loss for the period because of the timing of sales of fund shares and the amount of per share realized and unrealized gains and losses at such time. (i) For the period from the class' inception, December 31, 2002 (Class R), October 31, 2003 (Class R3), and April 1, 2005 (Classes R1, R2, R4, and R5) through the stated period end. (n) Not annualized. (r) Certain expenses have been reduced without which performance would have been lower. (s) From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower. (t) Total returns do not include any applicable sales charges. (w) Per share amount was less than $0.01. SEE NOTES TO FINANCIAL STATEMENTS NOTES TO FINANCIAL STATEMENTS (1) BUSINESS AND ORGANIZATION MFS Core Equity Fund (the fund) is a series of MFS Series Trust I (the trust). The trust is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open-end management investment company. (2) SIGNIFICANT ACCOUNTING POLICIES GENERAL - The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The fund can invest in foreign securities, including securities of emerging market issuers. Investments in foreign securities are vulnerable to the effects of changes in the relative values of the local currency and the U.S. dollar and to the effects of changes in each country's legal, political, and economic environment. The markets of emerging markets countries are generally more volatile than the markets of developed countries with more mature economies. All of the risks of investing in foreign securities previously described are heightened when investing in emerging markets countries. INVESTMENT VALUATIONS - Equity securities, including restricted equity securities, are generally valued at the last sale or official closing price as reported by an independent pricing service on the market or exchange on which they are primarily traded. For securities for which there were no sales reported that day, equity securities are generally valued at the last quoted daily bid quotation as reported by an independent pricing service on the market or exchange on which they are primarily traded. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which approximates market value. Open-end investment companies are generally valued at their net asset value per share. Securities and other assets generally valued on the basis of information from an independent pricing service may also be valued at a broker-dealer bid quotation. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates reported by an independent pricing service. The Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund's investments (including any fair valuation) to the adviser pursuant to valuation policies and procedures approved by the Board. If the adviser determines that reliable market quotations are not readily available, investments are valued at fair value as determined in good faith by the adviser in accordance with such procedures under the oversight of the Board of Trustees. Under the fund's valuation policies and procedures, market quotations are not considered to be readily available for many types of debt instruments. These investments are generally valued at fair value based on information from independent pricing services. The adviser may rely on independent pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund's net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of investments used to determine the fund's net asset value may differ from quoted or published prices for the same investments. In addition, investments may be valued at fair value if the adviser determines that an investment's value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund's net asset value, or after the halting of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. Events that occur on a frequent basis after foreign markets close (such as developments in foreign markets and significant movements in the U.S. markets) and prior to the determination of the fund's net asset value may be deemed to have a material affect on the value of securities traded in foreign markets. Accordingly, the fund's foreign equity securities may often be valued at fair value. REPURCHASE AGREEMENTS - The fund may enter into repurchase agreements with institutions that the fund's investment adviser has determined are creditworthy. Each repurchase agreement is recorded at cost. The fund requires that the securities collateral in a repurchase transaction be transferred to the custodian in a manner sufficient to enable the fund to obtain those securities in the event of a default under the repurchase agreement. The fund monitors, on a daily basis, the value of the collateral to ensure that its value, including accrued interest, is greater than amounts owed to the fund under each such repurchase agreement. The fund, along with other affiliated entities of Massachusetts Financial Services Company (MFS), may utilize a joint trading account for the purpose of entering into one or more repurchase agreements. FOREIGN CURRENCY TRANSLATION - Purchases and sales of foreign investments, income, and expenses are converted into U.S. dollars based upon currency exchange rates prevailing on the respective dates of such transactions. Gains and losses attributable to foreign currency exchange rates on sales of securities are recorded for financial statement purposes as net realized gains and losses on investments. Gains and losses attributable to foreign exchange rate movements on income and expenses are recorded for financial statement purposes as foreign currency transaction gains and losses. That portion of both realized and unrealized gains and losses on investments that results from fluctuations in foreign currency exchange rates is not separately disclosed. SECURITY LOANS - State Street Bank and Trust Company ("State Street"), as lending agent, may loan the securities of the fund to certain qualified institutions (the "Borrowers") approved by the fund. The loans are collateralized at all times by cash and/or U.S. Treasury securities in an amount at least equal to the market value of the securities loaned. State Street provides the fund with indemnification against Borrower default. The fund bears the risk of loss with respect to the investment of cash collateral. On loans collateralized by cash, the cash collateral is invested in a money market fund or short-term securities. A portion of the income generated upon investment of the collateral is remitted to the Borrowers, and the remainder is allocated between the fund and the lending agent. On loans collateralized by U.S. Treasury securities, a fee is received from the Borrower, and is allocated between the fund and the lending agent. Income from securities lending is included in interest income on the Statement of Operations. The dividend and interest income earned on the securities loaned is accounted for in the same manner as other dividend and interest income. SHORT TERM FEES - For purchases made on or after July 1, 2004 and before April 1, 2005, the fund charged a 2% redemption fee (which was retained by the fund) on proceeds from Class A, Class B, Class C, and Class I shares redeemed or exchanged within 5 business days following their acquisition (either by purchase or exchange). Effective April 1, 2005, the fund no longer charges a redemption fee. See the fund's prospectus for details. Any redemption fees charged are accounted for as an addition to paid-in-capital. INVESTMENT TRANSACTIONS AND INCOME - Investment transactions are recorded on the trade date. Interest income is recorded on the accrual basis. All premium and discount is amortized or accreted for financial statement purposes in accordance with U.S. generally accepted accounting principles. All discount is accreted for tax reporting purposes as required by federal income tax regulations. Dividends received in cash are recorded on the ex-dividend date. Certain dividends from foreign securities will be recorded when the fund is informed of the dividend if such information is obtained subsequent to the ex- dividend date. Dividend and interest payments received in additional securities are recorded on the ex-dividend or ex-interest date in an amount equal to the value of the security on such date. The fund may receive proceeds from litigation settlements involving its portfolio holdings. Any proceeds received are reflected in realized gain/loss in the Statement of Operations, or in unrealized gain/loss if the security is still held by the fund. FEES PAID INDIRECTLY - The fund's custody fee is reduced according to an arrangement that measures the value of cash deposited with the custodian by the fund. During the year ended August 31, 2006, the fund's custodian fees were reduced by $15,086 under this arrangement. The fund has entered into a commission recapture agreement, under which certain brokers will credit the fund a portion of the commissions generated, to offset certain expenses of the fund. For the year ended August 31, 2006, the fund's custodian expenses were reduced by $4,981 under this agreement. These amounts are shown as a reduction of total expenses on the Statement of Operations. Effective January 1, 2006, the commission recapture agreement was terminated. TAX MATTERS AND DISTRIBUTIONS - The fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable income, including realized capital gains. Accordingly, no provision for federal income tax is required in the financial statements. Foreign taxes, if any, have been accrued by the fund in the accompanying financial statements. Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future. Distributions in excess of net investment income or net realized gains are temporary over distributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions for financial statement and tax purposes. Book/tax differences primarily relate to net operating losses, wash sale loss deferrals, and treating a portion of the proceeds from redemptions as a distribution for tax purposes. The tax character of distributions declared to shareholders is as follows: 8/31/06 8/31/05 Long-term capital gain $11,087,499 $-- The federal tax cost and the tax basis components of distributable earnings were as follows: AS OF 8/31/06 Cost of investments $261,470,198 ---------------------------------------------------------- Gross appreciation $20,464,962 Gross depreciation(8,778,550) ---------------------------------------------------------- Net unrealized appreciation (depreciation) $11,686,412 Undistributed ordinary income 4,993,352 Undistributed long-term capital gain 10,977,092 Other temporary differences (98,447) In June 2006, FASB Interpretation No. 48, Accounting for Uncertainty in Income Taxes (the "Interpretation") was issued, and is effective for fiscal years beginning after December 15, 2006 and is to be applied to all open tax years as of the effective date. This Interpretation prescribes a minimum threshold for financial statement recognition of the benefit of a tax position taken or expected to be taken in a tax return, and requires certain expanded disclosures. Management has recently begun to evaluate the application of the Interpretation to the fund, and has not at this time determined the impact, if any, resulting from the adoption of this Interpretation on the fund's financial statements. MULTIPLE CLASSES OF SHARES OF BENEFICIAL INTEREST - The fund offers multiple classes of shares, which differ in their respective distribution and service fees. All shareholders bear the common expenses of the fund based on daily net assets of each class, without distinction between share classes. Dividends are declared separately for each class. Differences in per share dividend rates are generally due to differences in separate class expenses. Class B shares will convert to Class A shares approximately eight years after purchase. (3) TRANSACTIONS WITH AFFILIATES INVESTMENT ADVISER - The fund has an investment advisory agreement with MFS to provide overall investment management and related administrative services and facilities to the fund. The management fee is computed daily and paid monthly at the following annual rates: First $500 million of average daily net assets 0.65% Average daily net assets in excess of $500 million 0.55% The management fee incurred for the year ended August 31, 2006 was equivalent to an annual effective rate of 0.65% of the fund's average daily net assets. DISTRIBUTOR - MFS Fund Distributors, Inc. (MFD), a wholly-owned subsidiary of MFS, as distributor, received $35,228 for the year ended August 31, 2006, as its portion of the initial sales charge on sales of Class A shares of the fund. The Board of Trustees has adopted a distribution plan for certain class shares pursuant to Rule 12b-1 of the Investment Company Act of 1940. The fund's distribution plan provides that the fund will pay MFD for services provided by MFD and financial intermediaries in connection with the distribution and servicing of certain share classes. One component of the plan is a distribution fee paid to MFD and another component of the plan is a service fee paid to MFD. MFD may subsequently pay all, or a portion, of the distribution and/or service fees to financial intermediaries. Distribution Fee Plan Table: TOTAL ANNUAL DISTRIBUTION DISTRIBUTION SERVICE DISTRIBUTION EFFECTIVE AND SERVICE FEE RATE FEE RATE PLAN(d) RATE(e) FEE Class A 0.10% 0.25% 0.35% 0.35% $525,137 Class B 0.75% 0.25% 1.00% 1.00% 609,947 Class C 0.75% 0.25% 1.00% 1.00% 182,437 Class R 0.25% 0.25% 0.50% 0.50% 29,820 Class R1 0.50% 0.25% 0.75% 0.75% 1,638 Class R2 0.25% 0.25% 0.50% 0.50% 2,416 Class R3 0.25% 0.25% 0.50% 0.50% 5,753 Class R4 -- 0.25% 0.25% 0.25% 19,428 - --------------------------------------------------------------------------------------------------------------------- Total Distribution and Service Fees $1,376,576 (d) In accordance with the distribution plan for certain classes, the fund pays distribution and/or service fees up to these annual percentage rates of each class' average daily net assets. (e) The annual effective rates represent actual fees incurred under the distribution plan for the year ended August 31, 2006 based on each class' average daily net assets. Certain Class A and Class C shares are subject to a contingent deferred sales charge in the event of a shareholder redemption within 12 months of purchase. Class B shares are subject to a contingent deferred sales charge in the event of a shareholder redemption within six years of purchase. All contingent deferred sales charges are paid to MFD and during the year ended August 31, 2006, were as follows: AMOUNT Class A $1,201 Class B 115,937 Class C 1,429 SHAREHOLDER SERVICING AGENT - MFS Service Center, Inc. (MFSC), a wholly-owned subsidiary of MFS, receives a fee from the fund for its services as shareholder servicing agent calculated as a percentage of the average net assets of the fund as determined periodically under the supervision of the fund's Board of Trustees. For the year ended August 31, 2006, the fee was $242,986, which equated to 0.0976% annually of the fund's average daily net assets. MFSC also receives payment from the fund for out-of-pocket and sub- accounting expenses paid by MFSC on behalf of the fund. For the year ended August 31, 2006, these costs amounted to $93,393. The fund may also pay shareholder servicing related costs to non-related parties. ADMINISTRATOR - MFS provides certain financial, legal, shareholder communications, compliance, and other administrative services to the fund. Under an administrative services agreement, the fund partially reimburses MFS the costs incurred to provide these services. The fund is charged a fixed amount plus a fee based on calendar year average net assets. From July 1, 2005 through March 31, 2006, the fund's annual fixed amount was $10,000. Effective April 1, 2006, the fund's annual fixed amount is $17,500. The administrative services fee incurred for the year ended August 31, 2006 was equivalent to an annual effective rate of 0.0170% of the fund's average daily net assets. In addition to the administrative services provided by MFS to the fund as described above, MFS is responsible for providing certain retirement plan administration and services with respect to certain shares. These services include various administrative, recordkeeping, and communication/educational services with respect to the retirement plans which invest in these shares, and may be provided directly by MFS or by a third party. MFS may subsequently pay all, or a portion, of the retirement plan administration and services fee to affiliated or unaffiliated third parties. For the year ended August 31, 2006, the fund paid MFS an annual retirement plan administration and services fee up to the following annual percentage rates of each class' average daily net assets: ANNUAL EFFECTIVE TOTAL FEE RATE RATE(g) AMOUNT Class R1 0.45% 0.35% $983 Class R2 0.40% 0.25% 1,933 Class R3 0.25% 0.16% 2,876 Class R4 0.15% 0.15% 11,656 Class R5 0.10% 0.10% 55 - -------------------------------------------------------------------------------- Total Retirement Plan Administration and Services Fees $17,503 (g) Effective October 1, 2005, MFS has agreed in writing to waive a portion of the retirement plan administration and services fee equal to 0.10% for Class R1 shares, 0.15% for Class R2 shares, and 0.10% for Class R3 shares. This agreement will continue until at least September 30, 2008. For the year ended August 31, 2006, this waiver amounted to $2,004 and is reflected as a reduction of total expenses in the Statement of Operations. TRUSTEES' AND OFFICERS' COMPENSATION - The fund pays compensation to Independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. The fund does not pay compensation directly to Trustees or officers of the fund who are also officers of the investment adviser, all of whom receive remuneration for their services to the fund from MFS. Certain officers and Trustees of the fund are officers or directors of MFS, MFD, and MFSC. The fund has an unfunded, defined benefit plan for certain retired Independent Trustees which resulted in a pension expense of $2,180. The fund also has an unfunded retirement benefit deferral plan for certain Independent Trustees which resulted in a net decrease in expense of $546. Both amounts are included in Independent trustees' compensation for the year ended August 31, 2006. The deferred liability for retirement benefits payable to certain Trustees under both plans amounted to $35,416 at August 31, 2006, and is included in payable for independent trustees' compensation. OTHER - This fund and certain other MFS funds (the funds) have entered into a services agreement (the Agreement) which provides for payment of fees by the funds to Tarantino LLC in return for the provision of services of an Independent Chief Compliance Officer (ICCO) for the funds. The ICCO is an officer of the funds and the sole member of Tarantino LLC. The funds can terminate the Agreement with Tarantino LLC at any time under the terms of the Agreement. For the year ended August 31, 2006, the fee paid to Tarantino LLC was $1,618. MFS has agreed to reimburse the fund for a portion of the payments made by the funds to Tarantino LLC in the amount of $1,358, which is shown as a reduction of total expenses in the Statement of Operations. Additionally, MFS has agreed to bear all expenses associated with office space, other administrative support, and supplies provided to the ICCO. (4) PORTFOLIO SECURITIES Purchases and sales of investments, other than purchased option transactions and short-term obligations, were as follows: PURCHASES SALES U.S. government securities $1,857,500 $101,071 - -------------------------------------------------------------------------------- Investments (non-U.S. government securities) $336,371,694 $343,918,038 - -------------------------------------------------------------------------------- (5) SHARES OF BENEFICIAL INTEREST The fund's Declaration of Trust permits the Trustees to issue an unlimited number of full and fractional shares of beneficial interest. Transactions in fund shares were as follows: YEAR ENDED YEAR ENDED 8/31/06 8/31/05 SHARES AMOUNT SHARES AMOUNT Shares sold Class A 2,443,666 $43,867,932 5,204,906 $90,048,226 Class B 811,627 13,942,781 1,321,624 21,946,642 Class C 262,041 4,460,022 338,243 5,567,632 Class I 125,891 2,329,642 164,757 2,901,520 Class R 111,566 1,994,369 252,058 4,402,599 Class R1 26,009 443,322 3,214 52,371 Class R2 44,042 755,492 3,077 50,000 Class R3 35,849 633,797 22,723 393,385 Class R4 1,555,647 28,508,981 2,938 50,000 Class R5 3 81 2,938 50,000 - ---------------------------------------------------------------------------------------------------------- 5,416,341 $96,936,419 7,316,478 $125,462,375 Shares issued to shareholders in reinvestment of distributions Class A 355,194 $6,254,963 -- $-- Class B 171,172 2,860,279 -- -- Class C 42,451 706,380 -- -- Class I 6,859 124,080 -- -- Class R 16,688 292,512 -- -- Class R1 395 6,519 -- -- Class R2 148 2,469 -- -- Class R3 3,146 54,897 -- -- Class R4 134 2,358 -- -- Class R5 134 2,358 -- -- - ---------------------------------------------------------------------------------------------------------- 596,321 $10,306,815 -- $-- Shares reacquired Class A (2,675,775) $(47,849,495) (1,666,274) $(28,481,139) Class B (2,289,768) (38,886,362) (2,135,925) (34,776,369) Class C (387,175) (6,483,150) (374,082) (6,036,198) Class I (51,250) (948,111) (21,124) (370,848) Class R (157,462) (2,824,272) (119,291) (2,072,962) Class R1 (3,855) (64,830) -- -- Class R2 (1,935) (31,647) -- -- Class R3 (26,032) (463,349) (9,547) (156,007) Class R4 (311,276) (5,589,225) -- -- Class R5 (4) (76) -- -- - ---------------------------------------------------------------------------------------------------------- (5,904,532) $(103,140,517) (4,326,243) $(71,893,523) Net change Class A 123,085 $2,273,400 3,538,632 $61,567,087 Class B (1,306,969) (22,083,302) (814,301) (12,829,727) Class C (82,683) (1,316,748) (35,839) (468,566) Class I 81,500 1,505,611 143,633 2,530,672 Class R (29,208) (537,391) 132,767 2,329,637 Class R1 22,549 385,011 3,214 52,371 Class R2 42,255 726,314 3,077 50,000 Class R3 12,963 225,345 13,176 237,378 Class R4 1,244,505 22,922,114 2,938 50,000 Class R5 133 2,363 2,938 50,000 - ---------------------------------------------------------------------------------------------------------- 108,130 $4,102,717 2,990,235 $53,568,852 (6) LINE OF CREDIT The fund and other affiliated funds participate in a $1 billion unsecured committed line of credit provided by a syndication of banks under a credit agreement. In addition, the fund and other affiliated funds have established uncommitted borrowing arrangements with certain banks. Borrowings may be made for temporary financing needs. Interest is charged to each fund, based on its borrowings, generally at a rate equal to the Federal Reserve funds rate plus 0.35%. In addition, a commitment fee, based on the average daily, unused portion of the committed line of credit, is allocated among the participating funds at the end of each calendar quarter. For the year ended August 31, 2006, the fund's commitment fee and interest expense were $2,155 and $2,813, respectively, and are included in miscellaneous expense on the Statement of Operations. REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM To the Trustees of MFS Series Trust I and Shareholders of MFS Core Equity Fund: We have audited the accompanying statement of assets and liabilities of MFS Core Equity Fund (the Fund) (one of the portfolios comprising MFS Series Trust I), including the portfolio of investments, as of August 31, 2006, and the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended, and the financial highlights for each of the periods indicated therein. These financial statements and financial highlights are the responsibility of the Fund's management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. We were not engaged to perform an audit of the Fund's internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Fund's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements and financial highlights, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of August 31, 2006, by correspondence with the Fund's custodian and brokers or by other appropriate auditing procedures where replies from brokers were not received. We believe that our audits provide a reasonable basis for our opinion. In our opinion, the financial statements and financial highlights referred to above present fairly, in all material respects, the financial position of MFS Core Equity Fund at August 31, 2006, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended, and its financial highlights for each of the periods indicated therein, in conformity with U.S. generally accepted accounting principles. ERNST & YOUNG LLP Boston, Massachusetts October 20, 2006 TRUSTEES AND OFFICERS -- IDENTIFICATION AND BACKGROUND The Trustees and officers of the Trust, as of October 1, 2006, are listed below, together with their principal occupations during the past five years. (Their titles may have varied during that period.) The address of each Trustee and officer is 500 Boylston Street, Boston, Massachusetts 02116. PRINCIPAL OCCUPATIONS DURING POSITION(s) HELD TRUSTEE/OFFICER THE PAST FIVE YEARS & NAME, DATE OF BIRTH WITH FUND SINCE(h) OTHER DIRECTORSHIPS(j) - ------------------- ---------------- --------------- ---------------------------- INTERESTED TRUSTEES Robert J. Manning(k) Trustee February 2004 Massachusetts Financial Services (born 10/20/63) Company, Chief Executive Officer, President, Chief Investment Officer and Director Robert C. Pozen(k) Trustee February 2004 Massachusetts Financial Services (born 8/08/46) Company, Chairman (since February 2004); Secretary of Economic Affairs, The Commonwealth of Massachusetts (January 2002 to December 2002); Fidelity Investments, Vice Chairman (June 2000 to December 2001); Fidelity Management & Research Company (investment adviser), President (March 1997 to July 2001); Bell Canada Enterprises (telecommunications), Director; Medtronic, Inc. (medical technology), Director; Telesat (satellite communications), Director INDEPENDENT TRUSTEES J. Atwood Ives Trustee and Chair February 1992 Private investor; Eastern (born 5/01/36) of Trustees Enterprises (diversified services company), Chairman, Trustee and Chief Executive Officer (until November 2000) Robert E. Butler(n) Trustee January 2006 Consultant - regulatory and (born 11/29/41) compliance matters (since July 2002); PricewaterhouseCoopers LLP (professional services firm), Partner (November 2000 until June 2002) Lawrence H. Cohn, M.D. Trustee August 1993 Brigham and Women's Hospital, (born 3/11/37) Senior Cardiac Surgeon, Chief of Cardiac Surgery (until 2005); Harvard Medical School, Professor of Surgery; Brigham and Women's Hospital Physicians' Organization, Chair (2000 to 2004) David H. Gunning Trustee January 2004 Cleveland-Cliffs Inc. (mining (born 5/30/42) products and service provider), Vice Chairman/Director (since April 2001); Encinitos Ventures (private investment company), Principal (1997 to April 2001); Lincoln Electric Holdings, Inc. (welding equipment manufacturer), Director William R. Gutow Trustee December 1993 Private investor and real estate (born 9/27/41) consultant; Capitol Entertainment Management Company (video franchise), Vice Chairman Michael Hegarty Trustee December 2004 Retired; AXA Financial (financial (born 12/21/44) services and insurance), Vice Chairman and Chief Operating Officer (until May 2001); The Equitable Life Assurance Society (insurance), President and Chief Operating Officer (until May 2001) Lawrence T. Perera Trustee July 1981 Hemenway & Barnes (attorneys), (born 6/23/35) Partner J. Dale Sherratt Trustee August 1993 Insight Resources, Inc. (born 9/23/38) (acquisition planning specialists), President; Wellfleet Investments (investor in health care companies), Managing General Partner (since 1993); Cambridge Nutraceuticals (professional nutritional products), Chief Executive Officer (until May 2001) Laurie J. Thomsen Trustee March 2005 Private investor; Prism Venture (born 8/05/57) Partners (venture capital), Co- founder and General Partner (until June 2004); St. Paul Travelers Companies (commercial property liability insurance), Director Robert W. Uek Trustee January 2006 Retired (since 1999); (born 5/18/41) PricewaterhouseCoopers LLP (professional services firm), Partner (until 1999); Consultant to investment company industry (since 2000); TT International Funds (mutual fund complex), Trustee (2000 until 2005); Hillview Investment Trust II Funds (mutual fund complex), Trustee (2000 until 2005) OFFICERS Maria F. Dwyer(k) President November 2005 Massachusetts Financial Services (born 12/01/58) Company, Executive Vice President and Chief Regulatory Officer (since March 2004); Fidelity Management & Research Company, Vice President (prior to March 2004); Fidelity Group of Funds, President and Treasurer (prior to March 2004) Tracy Atkinson(k) Treasurer September 2005 Massachusetts Financial Services (born 12/30/64) Company, Senior Vice President (since September 2004); PricewaterhouseCoopers LLP, Partner (prior to September 2004) Christopher R. Bohane(k) Assistant Secretary July 2005 Massachusetts Financial Services (born 1/18/74) and Assistant Clerk Company, Vice President and Senior Counsel (since April 2003); Kirkpatrick & Lockhart LLP (law firm), Associate (prior to April 2003) Ethan D. Corey(k) Assistant Secretary July 2005 Massachusetts Financial Services (born 11/21/63) and Assistant Clerk Company, Special Counsel (since December 2004); Dechert LLP (law firm), Counsel (prior to December 2004) David L. DiLorenzo(k) Assistant Treasurer July 2005 Massachusetts Financial Services (born 8/10/68) Company, Vice President (since June 2005); JP Morgan Investor Services, Vice President (prior to June 2005) Timothy M. Fagan(k) Assistant Secretary September 2005 Massachusetts Financial Services (born 7/10/68) and Assistant Clerk Company, Vice President and Senior Counsel (since September 2005); John Hancock Advisers, LLC, Vice President and Chief Compliance Officer (September 2004 to August 2005), Senior Attorney (prior to September 2004); John Hancock Group of Funds, Vice President and Chief Compliance Officer (September 2004 to December 2004) Mark D. Fischer(k) Assistant Treasurer July 2005 Massachusetts Financial Services (born 10/27/70) Company, Vice President (since May 2005); JP Morgan Investment Management Company, Vice President (prior to May 2005) Brian E. Langenfeld(k) Assistant Secretary June 2006 Massachusetts Financial Services (born 3/07/73) and Assistant Clerk Company, Assistant Vice President and Counsel (since May 2006); John Hancock Advisers, LLC, Assistant Vice President and Counsel (May 2005 to April 2006); John Hancock Advisers, LLC, Attorney and Assistant Secretary (prior to May 2005) Ellen Moynihan(k) Assistant Treasurer April 1997 Massachusetts Financial Services (born 11/13/57) Company, Senior Vice President Susan S. Newton(k) Assistant Secretary May 2005 Massachusetts Financial Services (born 3/07/50) and Assistant Clerk Company, Senior Vice President and Associate General Counsel (since April 2005); John Hancock Advisers, LLC, Senior Vice President, Secretary and Chief Legal Officer (prior to April 2005); John Hancock Group of Funds, Senior Vice President, Secretary and Chief Legal Officer (prior to April 2005) Susan A. Pereira(k) Assistant Secretary July 2005 Massachusetts Financial Services (born 11/05/70) and Assistant Clerk Company, Vice President and Senior Counsel (since June 2004); Bingham McCutchen LLP (law firm), Associate (prior to June 2004) Mark N. Polebaum(k) Secretary and Clerk January 2006 Massachusetts Financial Services (born 5/01/52) Company, Executive Vice President, General Counsel and Secretary (since January 2006); Wilmer Cutler Pickering Hale and Dorr LLP (law firm), Partner (prior to January 2006) Frank L. Tarantino Independent Chief June 2004 Tarantino LLC (provider of (born 3/07/44) Compliance Officer compliance services), Principal (since June 2004); CRA Business Strategies Group (consulting services), Executive Vice President (April 2003 to June 2004); David L. Babson & Co. (investment adviser), Managing Director, Chief Administrative Officer and Director (prior to March 2003) James O. Yost(k) Assistant Treasurer September 1990 Massachusetts Financial Services (born 6/12/60) Company, Senior Vice President - ------------ (h) Date first appointed to serve as Trustee/officer of an MFS fund. Each Trustee has served continuously since appointment unless indicated otherwise. (j) Directorships or trusteeships of companies required to report to the Securities and Exchange Commission (i.e., "public companies"). (k) "Interested person" of the Trust within the meaning of the Investment Company Act of 1940 (referred to as the 1940 Act), which is the principal federal law governing investment companies like the fund, as a result of position with MFS. The address of MFS is 500 Boylston Street, Boston, Massachusetts 02116. (n) In 2004 and 2005, Mr. Butler provided consulting services to the independent compliance consultant retained by MFS pursuant to its settlement with the SEC concerning market timing and related matters. The terms of that settlement required that compensation and expenses related to the independent compliance consultant be borne exclusively by MFS and, therefore, MFS paid Mr. Butler for the services he rendered to the independent compliance consultant. In 2004 and 2005, MFS paid Mr. Butler a total of $351,119.29. The Trust held a shareholders' meeting in 2005 to elect Trustees, and will hold a shareholders' meeting at least once every five years thereafter, to elect Trustees. Each Trustee (except Mr. Butler and Mr. Uek) has been elected by shareholders and each Trustee and officer holds office until his or her successor is chosen and qualified or until his or her earlier death, resignation, retirement or removal. Messrs. Butler, Sherratt and Uek and Ms. Thomsen are members of the Trust's Audit Committee. Each of the Trust's Trustees and officers holds comparable positions with certain other funds of which MFS or a subsidiary is the investment adviser or distributor, and, in the case of the officers, with certain affiliates of MFS. As of January 1, 2006, the Trustees served as board members of 98 funds within the MFS Family of Funds. The Statement of Additional Information contains further information about the Trustees and is available without charge upon request by calling 1-800-225-2606. - ----------------------------------------------------------------------------------------------------------- INVESTMENT ADVISER CUSTODIAN Massachusetts Financial Services Company State Street Bank and Trust Company 500 Boylston Street, Boston, MA 02116-3741 225 Franklin Street, Boston, MA 02110 DISTRIBUTOR INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM MFS Fund Distributors, Inc. Ernst & Young LLP 500 Boylston Street, Boston, MA 02116-3741 200 Clarendon Street, Boston, MA 02116 PORTFOLIO MANAGER Katrina A. Mead BOARD REVIEW OF INVESTMENT ADVISORY AGREEMENT The Investment Company Act of 1940 requires that both the full Board of Trustees and a majority of the non-interested ("independent") Trustees, voting separately, annually approve the continuation of the Fund's investment advisory agreement with MFS. The Trustees consider matters bearing on the Fund and its advisory arrangements at their meetings throughout the year, including a review of performance data at each regular meeting. In addition, the independent Trustees met several times over the course of three months beginning in May and ending in July, 2006 ("contract review meetings") for the specific purpose of considering whether to approve the continuation of the investment advisory agreement for the Fund and the other investment companies that the Board oversees (the "MFS Funds"). The independent Trustees were assisted in their evaluation of the Fund's investment advisory agreement by independent legal counsel, from whom they received separate legal advice and with whom they met separately from MFS during various contract review meetings. The independent Trustees were also assisted in this process by the MFS Funds' Independent Chief Compliance Officer, a full-time senior officer appointed by and reporting to the independent Trustees. In connection with their deliberations regarding the continuation of the investment advisory agreement, the Trustees, including the independent Trustees, considered such information and factors as they believed, in light of the legal advice furnished to them and their own business judgment, to be relevant. The investment advisory agreement for the Fund was considered separately, although the Trustees also took into account the common interests of all MFS Funds in their review. As described below, the Trustees considered the nature, quality, and extent of the various investment advisory, administrative, and shareholder services performed by MFS under the existing investment advisory agreement and other arrangements with the Fund. In connection with their contract review meetings, the Trustees received and relied upon materials which included, among other items: (i) information provided by Lipper Inc. on the investment performance of the Fund for various time periods ended December 31, 2005 and the investment performance of a group of funds with substantially similar investment classifications/objectives (the "Lipper performance universe"), as well as the investment performance of a group of funds identified by objective criteria suggested by MFS ("MFS peer funds"), (ii) information provided by Lipper Inc. on the Fund's advisory fees and other expenses and the advisory fees and other expenses of comparable funds identified by Lipper (the "Lipper expense group"), as well as the advisory fees and other expenses of MFS peer funds, (iii) information provided by MFS on the advisory fees of comparable portfolios of other clients of MFS, including institutional separate accounts and other clients, (iv) information as to whether and to what extent applicable expense waivers, reimbursements or fee "breakpoints" are observed for the Fund, (v) information regarding MFS' financial results and financial condition, including MFS' and certain of its affiliates' estimated profitability from services performed for the Fund and the MFS Funds as a whole, (vi) MFS' views regarding the outlook for the mutual fund industry and the strategic business plans of MFS, (vii) descriptions of various functions performed by MFS for the Funds, such as compliance monitoring and portfolio trading practices, and (viii) information regarding the overall organization of MFS, including information about MFS' senior management and other personnel providing investment advisory, administrative and other services to the Fund and the other MFS Funds. The comparative performance, fee and expense information prepared and provided by Lipper Inc. was not independently verified and the independent Trustees did not independently verify any information provided to them by MFS. The Trustees' conclusion as to the continuation of the investment advisory agreement was based on a comprehensive consideration of all information provided to the Trustees and not the result of any single factor. Some of the factors that figured particularly in the Trustees' deliberations are described below, although individual Trustees may have evaluated the information presented differently from one another, giving different weights to various factors. It is also important to recognize that the fee arrangements for the Fund and other MFS Funds are the result of years of review and discussion between the independent Trustees and MFS, that certain aspects of such arrangements may receive greater scrutiny in some years than others, and that the Trustees' conclusions may be based, in part, on their consideration of these same arrangements during the course of the year and in prior years. Based on information provided by Lipper Inc. and MFS, the Trustees reviewed the Fund's total return investment performance as well as the performance of peer groups of funds over various time periods. The Trustees placed particular emphasis on the total return performance of the Fund's Class A shares in comparison to the performance of funds in its Lipper performance universe over the three-year period ended December 31, 2005, which the Trustees believed was a long enough period to reflect differing market conditions. The Fund's performance was in the 3rd quintile relative to the other funds in the universe for this three-year period (the 1st quintile being the best performers and the 5th quintile being the worst performers). The total return performance of the Fund's Class A shares was in the 4th quintile for the one- year period and the 3rd quintile for the five-year period ended December 31, 2005 relative to the Lipper performance universe. Because of the passage of time, these performance results may differ from the performance results for more recent periods, including those shown elsewhere in this report. In the course of their deliberations, the Trustees took into account information provided by MFS in connection with the contract review meetings, as well as during investment review meetings conducted with portfolio management personnel during the course of the year regarding the Fund's performance. After reviewing these and related factors, the Trustees concluded, within the context of their overall conclusions regarding the investment advisory agreement, that they were satisfied with MFS' responses and efforts relating to investment performance. In assessing the reasonableness of the Fund's advisory fee, the Trustees considered, among other information, the Fund's advisory fee and the total expense ratio of the Fund's Class A shares as a percentage of average net assets and the advisory fee and total expense ratios of peer groups of funds based on information provided by Lipper Inc. and MFS. The Trustees considered that MFS has agreed in writing to observe an advisory fee waiver on assets over $500 million, which may not be changed without the Trustees' approval. The Trustees also considered that, according to the Lipper data, the Fund's effective advisory fee rate was lower than the Lipper expense group median, and the Fund's total expense ratio was approximately at the Lipper expense group median. The Trustees also considered the advisory fees charged by MFS to institutional accounts. In comparing these fees, the Trustees considered information provided by MFS as to the generally broader scope of services provided by MFS to the Fund in comparison to institutional accounts, the higher demands placed on MFS' investment personnel and trading infrastructure as a result of the daily cash in-flows and out-flows of the Fund, and the impact on MFS and expenses associated with the more extensive regulatory regime to which the Fund is subject in comparison to institutional accounts. The Trustees also considered whether the Fund is likely to benefit from any economies of scale in the management of the Fund in the event of growth in assets of the Fund. They noted that the Fund's advisory fee rate schedule described above. The Trustees concluded that the existing breakpoint was sufficient to allow the Fund to benefit from economies of scale as its assets grow. The Trustees also considered information prepared by MFS relating to MFS' costs and profits with respect to the Fund, the MFS Funds considered as a group, and other investment companies and accounts advised by MFS, as well as MFS' methodologies used to determine and allocate its costs to the MFS Funds, the Fund and other accounts and products for purposes of estimating profitability. After reviewing these and other factors described herein, the Trustees concluded, within the context of their overall conclusions regarding the investment advisory agreement, that the advisory fees charged to the Fund represent reasonable compensation in light of the services being provided by MFS to the Fund. In addition, the Trustees considered MFS' resources and related efforts to continue to retain, attract and motivate capable personnel to serve the Fund. The Trustees also considered current and developing conditions in the financial services industry, including the entry into the industry of large and well-capitalized companies which are spending, and appear to be prepared to continue to spend, substantial sums to engage personnel and to provide services to competing investment companies. In this regard, the Trustees also considered the financial resources of MFS and its ultimate parent, Sun Life Financial Inc. The Trustees also considered the advantages and possible disadvantages to the Fund of having an adviser which also serves other investment companies as well as other accounts. The Trustees also considered the nature, quality, cost, and extent of administrative, transfer agency, and distribution services provided to the Fund by MFS and its affiliates under agreements and plans other than the investment advisory agreement, including any 12b-1 fees the Fund pays to MFS Fund Distributors, Inc., an affiliate of MFS. The Trustees also considered the nature, extent and quality of certain other services MFS performs or arranges for on the Fund's behalf, which may include securities lending programs, directed expense payment programs, class action recovery programs, and MFS' interaction with third-party service providers, principally custodians and sub-custodians. The Trustees concluded that the various non-advisory services provided by MFS and its affiliates on behalf of the Funds were satisfactory. The Trustees also considered benefits to MFS from the use of the Fund's portfolio brokerage commissions, if applicable, to pay for investment research (excluding third-party research, for which MFS pays directly), and various other factors. Additionally, the Trustees considered so-called "fall-out benefits" to MFS such as reputational value derived from serving as investment manager to the Fund. Based on their evaluation of factors that they deemed to be material, including those factors described above, the Board of Trustees, including a majority of the independent Trustees, concluded that the Fund's investment advisory agreement with MFS should be continued for an additional one-year period, commencing August 1, 2006. A discussion regarding the Board's most recent review and renewal of the Fund's investment advisory agreement will be available on or before November 1, 2006 by clicking on the fund's name under "Select a fund" on the MFS Web site (mfs.com). PROXY VOTING POLICIES AND INFORMATION A general description of the MFS funds' proxy voting policies and procedures is available without charge, upon request, by calling 1-800-225-2606, by visiting the Proxy Voting section of mfs.com or by visiting the SEC's Web site at http://www.sec.gov. Information regarding how the fund voted proxies relating to portfolio securities during the most recent twelve-month period ended June 30 is available without charge by visiting the Proxy Voting section of mfs.com or by visiting the SEC's Web site at http://www.sec.gov. QUARTERLY PORTFOLIO DISCLOSURE The fund will file a complete schedule of portfolio holdings with the Securities and Exchange Commission (the Commission) for the first and third quarters of each fiscal year on Form N-Q. The fund's Form N-Q may be reviewed and copied at the: Public Reference Room Securities and Exchange Commission 100 F Street, NE, Room 1580 Washington, D.C. 20549 Information on the operation of the Public Reference Room may be obtained by calling the Commission at 1-202-551-5850. The fund's Form N-Q is available on the EDGAR database on the Commission's Internet Web site at http://www.sec.gov, and copies of this information may be obtained, upon payment of a duplicating fee, by electronic request at the following e-mail address: publicinfo@sec.gov or by writing the Public Reference Section at the above address. A shareholder can also obtain the quarterly portfolio holdings report at mfs.com. FEDERAL TAX INFORMATION (unaudited) The fund will notify shareholders of amounts for use in preparing 2006 income tax forms in January 2007. The following information is provided pursuant to provisions of the Internal Revenue Code. The fund designates $13,496,568 as capital gain dividends paid during the fiscal year. MFS(R) PRIVACY NOTICE Privacy is a concern for every investor today. At MFS Investment Management(R) and the MFS funds, we take this concern very seriously. We want you to understand our policies about the investment products and services that we offer, and how we protect the nonpublic personal information of investors who have a direct relationship with us and our wholly owned subsidiaries. Throughout our business relationship, you provide us with personal information. We maintain information and records about you, your investments, and the services you use. Examples of the nonpublic personal information we maintain include o data from investment applications and other forms o share balances and transactional history with us, our affiliates, or others o facts from a consumer reporting agency We do not disclose any nonpublic personal information about our customers or former customers to anyone, except as permitted by law. We may share nonpublic personal information with third parties or certain of our affiliates in connection with servicing your account or processing your transactions. We may share information with companies or financial institutions that perform marketing services on our behalf or with other financial institutions with which we have joint marketing arrangements, subject to any legal requirements. Authorization to access your nonpublic personal information is limited to appropriate personnel who provide products, services, or information to you. We maintain physical, electronic, and procedural safeguards to help protect the personal information we collect about you. If you have any questions about the MFS privacy policy, please call 1-800-225-2606 any business day between 8 a.m. and 8 p.m. Eastern time. Note: If you own MFS products or receive MFS services in the name of a third party such as a bank or broker-dealer, their privacy policy may apply to you instead of ours. CONTACT US WEB SITE MAILING ADDRESS mfs.com MFS Service Center, Inc. P.O. Box 55824 MFS TALK Boston, MA 1-800-637-8255 02205-5824 24 hours a day OVERNIGHT MAIL ACCOUNT SERVICE AND MFS Service Center, Inc. LITERATURE 500 Boylston Street Boston, MA 02116-3741 SHAREHOLDERS 1-800-225-2606 8 a.m. to 8 p.m. ET INVESTMENT PROFESSIONALS 1-800-343-2829 8 a.m. to 8 p.m. ET RETIREMENT PLAN SERVICES 1-800-637-1255 8 a.m. to 8 p.m. ET - ------------------------------------------------------------------------------- Go paperless with eDELIVERY: Arrange to have MFS send prospectuses, reports, and proxies directly to your e-mail inbox. You'll get timely information and less clutter in your mailbox (not to mention help your fund save printing and postage costs). SIGN UP: If your account is registered with us, simply go to mfs.com, log in to your account via MFS Access, and select the eDelivery sign up options. If you own your MFS fund shares through a financial institution or a retirement plan, MFS TALK, MFS Access, and eDelivery may not be available to you. - ------------------------------------------------------------------------------- M F S(R) INVESTMENT MANAGEMENT M F S(R) INVESTMENT MANAGEMENT [graphic omitted] ANNUAL REPORT KEEPING YOU INFORMED MFS wants to ensure that you are consistently updated about your investments with us. This shareholder report will not only show how your investment performed during the time period, but will also provide you with informative commentary from the portfolio management team. They will offer an overview of market conditions and will also discuss the specific factors that may have enhanced or detracted from your investment's performance. MFS(R) RESEARCH INTERNATIONAL FUND LETTER FROM THE CEO 1 - --------------------------------------------------------------- PORTFOLIO COMPOSITION 2 - --------------------------------------------------------------- MANAGEMENT REVIEW 3 - --------------------------------------------------------------- PERFORMANCE SUMMARY 5 - --------------------------------------------------------------- EXPENSE TABLE 8 - --------------------------------------------------------------- PORTFOLIO OF INVESTMENTS 10 - --------------------------------------------------------------- STATEMENT OF ASSETS AND LIABILITIES 16 - --------------------------------------------------------------- STATEMENT OF OPERATIONS 19 - --------------------------------------------------------------- STATEMENTS OF CHANGES IN NET ASSETS 21 - --------------------------------------------------------------- FINANCIAL HIGHLIGHTS 23 - --------------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 35 - --------------------------------------------------------------- REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM 47 - --------------------------------------------------------------- TRUSTEES AND OFFICERS 48 - --------------------------------------------------------------- BOARD REVIEW OF INVESTMENT ADVISORY AGREEMENT 54 - --------------------------------------------------------------- PROXY VOTING POLICIES AND INFORMATION 58 - --------------------------------------------------------------- QUARTERLY PORTFOLIO DISCLOSURE 58 - --------------------------------------------------------------- FEDERAL TAX INFORMATION 58 - --------------------------------------------------------------- MFS(R) PRIVACY NOTICE 59 - --------------------------------------------------------------- CONTACT INFORMATION BACK COVER - --------------------------------------------------------------- Fund objective: Seeks to provide capital appreciation. THE REPORT IS PREPARED FOR THE GENERAL INFORMATION OF SHAREHOLDERS. IT IS AUTHORIZED FOR DISTRIBUTION TO PROSPECTIVE INVESTORS ONLY WHEN PRECEDED OR ACCOMPANIED BY A CURRENT PROSPECTUS. - ------------------------------------------------------------------------------ NOT FDIC INSURED o MAY LOSE VALUE o NO BANK OR CREDIT UNION GUARANTEE o NOT A DEPOSIT o NOT INSURED BY ANY FEDERAL GOVERNMENT AGENCY OR NCUA/NCUSIF - ------------------------------------------------------------------------------ 8/31/06 RIF-ANN LETTER FROM THE CEO [Photo of Robert J. Manning] Dear Shareholders: The story is as old as the tortoise and the hare, but we believe it is still relevant today -- "slow and steady" is the way to go when it comes to investing. While financial markets will naturally ebb and flow over time, investors who remain committed to a long-term investment strategy are more likely to achieve their goals than those who consistently chase short-term performance. The first half of 2006 brought a high degree of fluctuation in markets around the globe as varying economic factors pulled markets in opposite directions. The global economy, for example, continued to grow at its fastest pace in three decades -- spurred by increased international trade, good job growth, and wage increases. At the same time, central banks around the world raised interest rates in sync in a collaborative attempt to curb inflation. While this was a positive development in some regions, in other cases, economic and market gains were tempered. What does all of this mean to you as an investor? If you're focused on the long term, these global developments become part of a longer cycle instead of one-time events that can have a significant impact on your portfolio. At MFS(R), our investment management process -- honed over 80 years -- combines a unique teamwork approach with an unwavering focus on helping you realize your long-term financial goals. We believe in a three-pronged investment strategy: o ALLOCATE holdings across the major asset classes -- including stocks, bonds, and cash. o DIVERSIFY within each class to take advantage of different market segments and investing styles. o REBALANCE assets regularly to maintain a desired asset allocation. Of course, these strategies cannot guarantee a profit or protect against a loss. Investing and planning for the long term requires diligence and patience, two traits that in our experience are essential to capitalizing on the many opportunities the financial markets can offer -- through both up and down economic cycles. Respectfully, /s/ Robert J. Manning Robert J. Manning Chief Executive Officer and Chief Investment Officer MFS Investment Management(R) October 13, 2006 The opinions expressed in this letter are subject to change, may not be relied upon for investment advice, and no forecasts can be guaranteed. PORTFOLIO COMPOSITION PORTFOLIO STRUCTURE Common Stocks 98.9% Cash & Other Net Assets 1.1% TOP TEN HOLDINGS GlaxoSmithKline PLC 3.3% ------------------------------------------------ Royal Dutch Shell PLC, "A" 2.5% ------------------------------------------------ TOTAL S.A. 2.3% ------------------------------------------------ Nestle S.A. 2.2% ------------------------------------------------ BHP Billiton PLC 2.0% ------------------------------------------------ E.ON AG 2.0% ------------------------------------------------ Samsung Electronics Co. Ltd. 2.0% ------------------------------------------------ UBS AG 1.9% ------------------------------------------------ BNP Paribas 1.9% ------------------------------------------------ HSBC Holdings PLC 1.8% ------------------------------------------------ EQUITY SECTORS Financial Services 29.0% ------------------------------------------------ Basic Materials 11.8% ------------------------------------------------ Utilities & Communications 10.6% ------------------------------------------------ Autos & Housing 9.0% ------------------------------------------------ Health Care 7.9% ------------------------------------------------ Energy 7.3% ------------------------------------------------ Technology 6.9% ------------------------------------------------ Consumer Staples 6.5% ------------------------------------------------ Leisure 5.2% ------------------------------------------------ Retailing 4.7% ------------------------------------------------ COUNTRY WEIGHTINGS United Kingdom 18.9% ------------------------------------------------ Japan 16.8% ------------------------------------------------ France 12.4% ------------------------------------------------ Switzerland 10.0% ------------------------------------------------ Germany 8.2% ------------------------------------------------ Italy 4.3% ------------------------------------------------ South Korea 4.1% ------------------------------------------------ Mexico 3.5% ------------------------------------------------ Brazil 3.3% ------------------------------------------------ Other 18.5% ------------------------------------------------ Percentages are based on net assets as of 8/31/06. The portfolio is actively managed and current holdings may be different. MANAGEMENT REVIEW SUMMARY OF RESULTS For the twelve months ended August 31, 2006, Class A shares of the MFS Research International Fund provided a total return of 27.18%, at net asset value. This compares with a return of 24.78% for the fund's benchmark, the MSCI EAFE Index. CONTRIBUTORS TO PERFORMANCE Security selection in the energy sector was the primary contributor to performance relative to the fund's benchmark over the period. Our holdings in oil company LUKOIL* (Russia), which is not a benchmark constituent, boosted results. LUKOIL benefited from high oil prices and a recent upgrade in the company's credit rating by Moody's to investment grade levels. Our underweighted positions in BP* (UK) and Royal Dutch Shell (UK) also helped relative performance as the two integrated energy giants underperformed the benchmark. Stock selection in the utilities and communications sector aided relative results, led by strong performance from energy distributors E.ON (Germany) and SUEZ (France). The autos and housing sector also helped performance, although no individual securities within this sector were among the fund's top contributors. In other sectors, global steel giant Arcelor* was the top contributing holding during the period. We believe that shares of Arcelor gained in response to rival Mittal Steel's takeover bid for the company. Our positions in several strong-performing financial services companies also bolstered results including real estate company Leopalace21* (Japan), financing firm ORIX (Japan), and banking firms Kookmin Bank* (South Korea) and Unibanco-Uniao de Bancos Brasileiros (Brazil). During the reporting period, our currency exposure was a contributor to the fund's relative performance. All of MFS' investment decisions are driven by the fundamentals of each individual opportunity and, as such, it is common for our portfolios to have different currency exposure than the benchmark. DETRACTORS FROM PERFORMANCE Security selection in the health care sector detracted from relative results over the period. In particular, our position in strong-performing pharmaceutical firm Astrazeneca* (UK), a benchmark constituent, hurt relative performance as we missed much of the run-up in the stock's price occurring late in the reporting period. Pharmaceutical company GlaxoSmithKline (UK) was also among the top detracting stocks relative to the benchmark. Our underweighted position and, to a lesser extent, security selection in the special products and services sector hurt performance relative to the benchmark. Stock selection in the retailing sector also detracted from results. Some of our holdings in Japanese financial services firms were among the fund's top detractors during the reporting period. These included consumer financing firms Aiful and Takefuji, and real estate consulting company K.K. DaVinci Advisors*. Aiful and Takefuji struggled during the period in an increasingly difficult regulatory, business and media environment for consumer finance companies. Elsewhere, chemical company Kaneka* (Japan) hurt relative results. We feel that Kaneka's shares fell on growing concerns about oversupply of its nutritional food supplement, CoQ10, and the company's lack of pricing power on these products due to increased competition. Other stocks that hindered performance included banking firm OTP Bank (Hungary), broadband service provider FastWeb* (Italy), neither of which are benchmark constituents, and integrated oil company TOTAL (France). The fund's cash position was a detractor from relative performance. The fund holds cash to buy new holdings and to provide liquidity. In a period when equity markets rose, as measured by the fund's benchmark, holding cash hurt performance versus the benchmark, which has no cash position. Respectfully, Jose Luis Garcia Thomas Melendez Portfolio Manager Portfolio Manager The fund is managed by a team of Global MFS Equity Research analysts, under the general supervision of Mr. Melendez and Mr. Garcia. * Security was not held in the portfolio at period end. The views expressed in this report are those of the portfolio managers only through the end of the period of the report as stated on the cover and do not necessarily reflect the views of MFS or any other person in the MFS organization. These views are subject to change at any time based on market and other conditions, and MFS disclaims any responsibility to update such views. These views may not be relied upon as investment advice or an indication of trading intent on behalf of any MFS portfolio. References to specific securities are not recommendations of such securities, and may not be representative of any MFS portfolio's current or future investments. PERFORMANCE SUMMARY THROUGH 8/31/06 The following chart illustrates the historical performance of the fund's Class A shares in comparison to its benchmark. Performance results include the deduction of the maximum applicable sales charge and reflect the percentage change in net asset value, including reinvestment of dividends and capital gains distributions. The performance of other share classes will be greater than or less than that of the class depicted below. Benchmark comparisons are unmanaged; do not reflect sales charges, commissions or expenses; and cannot be invested in directly. (See Notes to Performance Summary.) PERFORMANCE DATA SHOWN REPRESENTS PAST PERFORMANCE AND IS NO GUARANTEE OF FUTURE RESULTS. INVESTMENT RETURN AND PRINCIPAL VALUE FLUCTUATE SO YOUR SHARES, WHEN SOLD, MAY BE WORTH MORE OR LESS THAN THE ORIGINAL COST; CURRENT PERFORMANCE MAY BE LOWER OR HIGHER THAN QUOTED. FOR MOST RECENT MONTH-END PERFORMANCE, PLEASE VISIT MFS.COM. (FOR THE MOST RECENT MONTH-END PERFORMANCE FOR CLASS I SHARES CALL 1-800-343-2829.) THE PERFORMANCE SHOWN DOES NOT REFLECT THE DEDUCTION OF TAXES, IF ANY, THAT A SHAREHOLDER WOULD PAY ON FUND DISTRIBUTIONS OR THE REDEMPTION OF FUND SHARES. GROWTH OF A HYPOTHETICAL $10,000 INVESTMENT (For the period from the commencement of the fund's investment operations, January 2, 1997, through the stated period end.) MFS Research International Fund MSCI EAFE -- Class A Index 1/97 $ 9,425 $10,000 8/97 10,330 10,476 8/98 10,735 10,490 8/99 13,261 13,220 8/00 17,638 14,517 8/01 13,799 11,021 8/02 12,143 9,403 8/03 12,988 10,304 8/04 16,060 12,683 8/05 19,700 15,738 8/06 25,055 19,638 TOTAL RETURNS THROUGH 8/31/06 AVERAGE ANNUAL WITHOUT SALES CHARGE Share class Class inception date 1-yr 5-yr Life (t) - ---------------------------------------------------------------------------- A 1/02/97 27.18% 12.67% 10.65% - ---------------------------------------------------------------------------- B 1/02/98 26.36% 11.95% 10.04% - ---------------------------------------------------------------------------- C 1/02/98 26.38% 11.96% 10.04% - ---------------------------------------------------------------------------- I 1/02/97 27.61% 13.07% 11.02% - ---------------------------------------------------------------------------- W 5/01/06 27.25% 12.68% 10.66% - ---------------------------------------------------------------------------- R 12/31/02 26.98% 12.54% 10.58% - ---------------------------------------------------------------------------- R1 4/01/05 26.12% 12.42% 10.52% - ---------------------------------------------------------------------------- R2 4/01/05 26.63% 12.54% 10.58% - ---------------------------------------------------------------------------- R3 10/31/03 26.79% 12.42% 10.53% - ---------------------------------------------------------------------------- R4 4/01/05 27.07% 12.65% 10.64% - ---------------------------------------------------------------------------- R5 4/01/05 27.50% 12.75% 10.69% - ---------------------------------------------------------------------------- 529A 7/31/02 26.86% 12.45% 10.54% - ---------------------------------------------------------------------------- 529B 7/31/02 26.06% 11.85% 10.23% - ---------------------------------------------------------------------------- 529C 7/31/02 25.98% 11.84% 10.23% - ---------------------------------------------------------------------------- AVERAGE ANNUAL Comparative benchmark - ---------------------------------------------------------------------------- MSCI EAFE Index (f) 24.78% 12.25% 7.23% - ---------------------------------------------------------------------------- AVERAGE ANNUAL WITH SALES CHARGE Share class - ---------------------------------------------------------------------------- A 19.87% 11.34% 9.97% With Initial Sales Charge (5.75%) - ---------------------------------------------------------------------------- B 22.36% 11.70% 10.04% With CDSC (Declining over six years from 4% to 0%) (x) - ---------------------------------------------------------------------------- C 25.38% 11.96% 10.04% With CDSC (1% for 12 months) (x) - ---------------------------------------------------------------------------- 529A 19.57% 11.12% 9.86% With Initial Sales Charge (5.75%) - ---------------------------------------------------------------------------- 529B 22.06% 11.59% 10.23% With CDSC (Declining over six years from 4% to 0%) (x) - ---------------------------------------------------------------------------- 529C 24.98% 11.84% 10.23% With CDSC (1% for 12 months) (x) - ---------------------------------------------------------------------------- Class I, W, R, R1, R2, R3, R4, and R5 shares do not have a sales charge. Please see Notes to Performance Summary for more details. CDSC - Contingent Deferred Sales Charge. (f) Source: FactSet Research Systems Inc. (t) For the period from the commencement of the fund's investment operations, January 2, 1997, through the stated period end. (x) Assuming redemption at the end of the applicable period. INDEX DEFINITION Morgan Stanley Capital International (MSCI) EAFE (Europe, Australasia, Far East) Index - a market capitalization index that is designed to measure developed market equity performance, excluding the U.S. and Canada. It is not possible to invest directly in an index. NOTES TO PERFORMANCE SUMMARY Class R shares are available only to existing Class R shareholders. Class I shares are only available to certain eligible investors, and Class R1, R2, R3, R4, and R5 shares are only available to certain retirement plans. Class 529 shares are only available in conjunction with qualified tuition programs, such as the MFS 529 Savings Plan. There also is an additional annual fee, which is detailed in the program description, on qualified tuition programs. If this fee was reflected, the performance for Class 529 shares would have been lower. This annual fee is waived for Oregon residents and for those accounts with assets of $25,000 or more. Class W shares are intended for purchase only through fee-based wrap programs sponsored by financial intermediaries, such as brokerage firms and investment advisers, that have entered into an agreement with the fund's distributor to offer Class W shares to their wrap program clients. The use of Class W shares by a financial intermediary sponsor of a fee-based program will depend on, among other things, the structure of the particular fee-based wrap program. Class W shares may be purchased at net asset value without an initial sales charge or CDSC upon redemption. Performance for share classes offered after Class A shares includes the performance of the fund's Class A shares for periods prior to their offering. This blended class performance has been adjusted to take into account differences in sales loads, if any, applicable to these share classes, but has not been adjusted to take into account differences in class specific operating expenses (such as Rule 12b-1 fees). Compared to performance these share classes would have experienced had they been offered for the entire period, the use of blended performance generally results in higher performance for share classes with higher operating expenses than the share class to which it is blended, and lower performance for share classes with lower operating expenses than the share class to which it is blended. Performance results reflect any applicable expense subsidies and waivers in effect during the periods shown. Without such subsidies and waivers the fund's performance results would be less favorable. Please see the prospectus and financial statements for complete details. From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower. EXPENSE TABLE Fund expenses borne by the shareholders during the period, March 1, 2006 through August 31, 2006. As a shareholder of the fund, you incur two types of costs: (1) transaction costs, including sales charges (loads) on certain purchase or redemption payments and redemption fees on certain exchanges and redemptions, and (2) ongoing costs, including management fees; distribution and service (12b-1) fees; and other fund expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in the fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period March 1, 2006 through August 31, 2006. ACTUAL EXPENSES The first line for each share class in the following table provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number in the first line under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. HYPOTHETICAL EXAMPLE FOR COMPARISON PURPOSES The second line for each share class in the following table provides information about hypothetical account values and hypothetical expenses based on the fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs, such as sales charges (loads) or redemption fees. Therefore, the second line for each share class in the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher. - ------------------------------------------------------------------------------- Expenses Paid During Annualized Beginning Ending Period(p) Share Expense Account Value Account Value 3/01/06- Class Ratio 3/01/06 8/31/06 8/31/06 - -------------------------------------------------------------------------------- Actual 1.38% $1,000.00 $1,068.70 $7.20 A ------------------------------------------------------------------------ Hypothetical (h) 1.38% $1,000.00 $1,018.25 $7.02 - -------------------------------------------------------------------------------- Actual 2.03% $1,000.00 $1,065.20 $10.57 B ------------------------------------------------------------------------- Hypothetical (h) 2.03% $1,000.00 $1,014.97 $10.31 - -------------------------------------------------------------------------------- Actual 2.03% $1,000.00 $1,065.40 $10.57 C ------------------------------------------------------------------------ Hypothetical (h) 2.03% $1,000.00 $1,014.97 $10.31 - -------------------------------------------------------------------------------- Actual 1.04% $1,000.00 $1,071.00 $5.43 I ------------------------------------------------------------------------ Hypothetical (h) 1.04% $1,000.00 $1,019.96 $5.30 - -------------------------------------------------------------------------------- Actual 1.20% $1,000.00 $995.40 $4.03 (i) W ------------------------------------------------------------------------ Hypothetical (h) 1.20% $1,000.00 $1,012.81 $4.07 (i) - -------------------------------------------------------------------------------- Actual 1.53% $1,000.00 $1,068.10 $7.98 R ------------------------------------------------------------------------ Hypothetical (h) 1.53% $1,000.00 $1,017.49 $7.78 - -------------------------------------------------------------------------------- Actual 2.13% $1,000.00 $1,064.50 $11.08 R1 ------------------------------------------------------------------------ Hypothetical (h) 2.13% $1,000.00 $1,014.47 $10.82 - -------------------------------------------------------------------------------- Actual 1.78% $1,000.00 $1,066.60 $9.27 R2 ------------------------------------------------------------------------ Hypothetical (h) 1.78% $1,000.00 $1,016.23 $9.05 - -------------------------------------------------------------------------------- Actual 1.68% $1,000.00 $1,067.00 $8.75 R3 ------------------------------------------------------------------------ Hypothetical (h) 1.68% $1,000.00 $1,016.74 $8.54 - -------------------------------------------------------------------------------- Actual 1.46% $1,000.00 $1,068.30 $7.61 R4 ------------------------------------------------------------------------ Hypothetical (h) 1.46% $1,000.00 $1,017.85 $7.43 - -------------------------------------------------------------------------------- Actual 1.15% $1,000.00 $1,070.40 $6.00 R5 ------------------------------------------------------------------------ Hypothetical (h) 1.15% $1,000.00 $1,019.41 $5.85 - -------------------------------------------------------------------------------- Actual 1.63% $1,000.00 $1,067.60 $8.49 529A ------------------------------------------------------------------------ Hypothetical (h) 1.63% $1,000.00 $1,016.99 $8.29 - -------------------------------------------------------------------------------- Actual 2.28% $1,000.00 $1,064.10 $11.86 529B ------------------------------------------------------------------------ Hypothetical (h) 2.28% $1,000.00 $1,013.71 $11.57 - -------------------------------------------------------------------------------- Actual 2.28% $1,000.00 $1,064.20 $11.86 529C ------------------------------------------------------------------------ Hypothetical (h) 2.28% $1,000.00 $1,013.71 $11.57 - -------------------------------------------------------------------------------- (h) 5% class return per year before expenses. (i) For the period from the class' inception, May 1, 2006 through August 31, 2006. (p) Expenses paid is equal to each class' annualized expense ratio, as shown above, multiplied by the average account value over the period, multiplied by the number of days in the period, divided by the number of days in the year. Expenses paid do not include any applicable sales charges (loads) or redemption fees. If these transaction costs had been included, your costs would have been higher. PORTFOLIO OF INVESTMENTS 8/31/06 The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes. Common Stocks - 98.9% - -------------------------------------------------------------------------------------------------- ISSUER SHARES/PAR VALUE ($) - -------------------------------------------------------------------------------------------------- Aerospace - 0.6% - -------------------------------------------------------------------------------------------------- Finmeccanica S.p.A 964,260 $ 21,351,228 - -------------------------------------------------------------------------------------------------- Airlines - 0.3% - -------------------------------------------------------------------------------------------------- Grupo Aeroportuario del Pacifico S.A. de C.V., ADR 343,030 $ 11,645,869 - -------------------------------------------------------------------------------------------------- Alcoholic Beverages - 1.8% - -------------------------------------------------------------------------------------------------- Diageo PLC 1,909,210 $ 34,004,582 Grupo Modelo S.A. de C.V., "C" 2,789,820 11,751,048 Pernod Ricard S.A. (l) 73,170 15,967,344 --------------- $ 61,722,974 --------------- Apparel Manufacturers - 1.9% - -------------------------------------------------------------------------------------------------- Burberry Group PLC 2,586,070 $ 23,571,887 Li & Fung Ltd. 8,090,000 19,244,196 LVMH Moet Hennessy Louis Vuitton S.A. (l) 215,070 22,143,725 --------------- $ 64,959,808 - -------------------------------------------------------------------------------------------------- Automotive - 5.2% - -------------------------------------------------------------------------------------------------- Bayerische Motoren Werke AG 688,980 $ 35,702,837 Compagnie Generale des Etablissements Michelin (l) 285,190 19,368,462 Continental AG 457,684 48,970,797 Hyundai Mobis 219,250 20,093,545 Nissan Motor Co. Ltd. (l) 2,843,700 32,331,849 Toyota Motor Corp. (l) 451,700 24,523,387 --------------- $ 180,990,877 - -------------------------------------------------------------------------------------------------- Biotechnology - 0.9% - -------------------------------------------------------------------------------------------------- Actelion Ltd. (n) 240,670 $ 32,238,004 - -------------------------------------------------------------------------------------------------- Broadcasting - 3.3% - -------------------------------------------------------------------------------------------------- Antena 3 de Television S.A. (l) 757,950 $ 17,443,429 Grupo Televisa S.A., ADR 1,561,150 29,724,296 Nippon Television Network Corp. 97,200 13,238,353 WPP Group PLC 4,446,040 54,203,268 --------------- $ 114,609,346 - -------------------------------------------------------------------------------------------------- Brokerage & Asset Managers - 0.3% - -------------------------------------------------------------------------------------------------- Singapore Exchange Ltd. 3,641,000 $ 9,209,228 - -------------------------------------------------------------------------------------------------- Business Services - 0.6% - -------------------------------------------------------------------------------------------------- Mitsubishi Corp. 1,063,400 $ 21,661,348 - -------------------------------------------------------------------------------------------------- Chemicals - 3.9% - -------------------------------------------------------------------------------------------------- Bayer AG 1,163,540 $ 57,655,462 Sasol Ltd. 383,600 13,291,753 Syngenta AG 266,784 39,183,832 Umicore 183,620 26,705,506 --------------- $ 136,836,553 - -------------------------------------------------------------------------------------------------- Computer Software - Systems - 0.6% - -------------------------------------------------------------------------------------------------- Capgemini S.A. (l) 403,300 $ 22,097,894 - -------------------------------------------------------------------------------------------------- Conglomerates - 1.2% - -------------------------------------------------------------------------------------------------- Siemens AG (l) 492,110 $ 41,732,454 - -------------------------------------------------------------------------------------------------- Construction - 2.4% - -------------------------------------------------------------------------------------------------- CEMEX S.A. de C.V., ADR (n) 1,114,206 $ 32,189,411 CRH PLC 630,500 21,870,480 Italcementi S.p.A 1,103,560 17,457,096 Italcementi S.p.A. - Ordinary (l) 531,070 13,108,051 --------------- $ 84,625,038 - -------------------------------------------------------------------------------------------------- Consumer Goods & Services - 2.2% - -------------------------------------------------------------------------------------------------- Kao Corp. (l) 1,302,000 $ 34,733,316 Kimberly-Clark de Mexico S.A. de C.V., "A" 3,607,270 13,581,982 Reckitt Benckiser PLC 643,290 26,713,785 --------------- $ 75,029,083 - -------------------------------------------------------------------------------------------------- Electrical Equipment - 1.2% - -------------------------------------------------------------------------------------------------- Schneider Electric S.A. (l) 400,163 $ 42,688,032 - -------------------------------------------------------------------------------------------------- Electronics - 5.1% - -------------------------------------------------------------------------------------------------- Konica Minolta Holdings, Inc. (n) 1,643,000 $ 21,494,971 Nintendo Co. Ltd. 109,700 22,514,071 Nippon Electric Glass Co. Ltd. (l) 471,000 11,440,808 Royal Philips Electronics N.V 988,010 33,701,898 Samsung Electronics Co. Ltd. 100,671 68,070,477 Taiwan Semiconductor Manufacturing Co. Ltd. 10,983,508 19,397,292 --------------- $ 176,619,517 - -------------------------------------------------------------------------------------------------- Energy - Independent - 0.4% - -------------------------------------------------------------------------------------------------- Norsk Hydro A.S.A. (l) 593,400 $ 15,302,525 - -------------------------------------------------------------------------------------------------- Energy - Integrated - 6.3% - -------------------------------------------------------------------------------------------------- Petroleo Brasileiro S.A., ADR 141,550 $ 12,691,373 Royal Dutch Shell PLC, "A" 2,525,130 87,544,177 Statoil A.S.A. (l) 1,324,320 35,722,782 TOTAL S.A 1,197,300 80,853,451 --------------- $ 216,811,783 - -------------------------------------------------------------------------------------------------- Food & Beverages - 2.5% - -------------------------------------------------------------------------------------------------- Nestle S.A. (l) 218,666 $ 75,225,867 Nong Shim Co. Ltd. 39,967 9,624,842 --------------- $ 84,850,709 - -------------------------------------------------------------------------------------------------- Food & Drug Stores - 1.2% - -------------------------------------------------------------------------------------------------- Sundrug Co. Ltd. 318,400 $ 7,788,358 Tesco PLC 4,873,859 35,024,693 --------------- $ 42,813,051 - -------------------------------------------------------------------------------------------------- Forest & Paper Products - 0.8% - -------------------------------------------------------------------------------------------------- Aracruz Celulose S.A., ADR (l) 188,870 $ 9,808,019 Votorantim Celulose e Papel S.A., ADR (l) 1,032,863 16,660,080 --------------- $ 26,468,099 - -------------------------------------------------------------------------------------------------- Insurance - 4.0% - -------------------------------------------------------------------------------------------------- Assicurazioni Generali S.p.A. (l) 1,236,360 $ 46,625,143 AXA (l) 1,617,980 60,125,142 Swiss Reinsurance Co. 405,907 30,979,978 --------------- $ 137,730,263 - -------------------------------------------------------------------------------------------------- Internet - 0.3% - -------------------------------------------------------------------------------------------------- Universo Online S.A., IPS (n) 1,528,800 $ 8,730,909 - -------------------------------------------------------------------------------------------------- Leisure & Toys - 1.6% - -------------------------------------------------------------------------------------------------- Capcom Co. Ltd. (l) 805,500 $ 11,691,524 Konami Corp. (l) 803,200 20,468,491 NAMCO BANDAI Holdings, Inc. 1,418,400 22,352,524 --------------- $ 54,512,539 - -------------------------------------------------------------------------------------------------- Machinery & Tools - 0.8% - -------------------------------------------------------------------------------------------------- Fanuc Ltd. 353,000 $ 28,010,142 - -------------------------------------------------------------------------------------------------- Major Banks - 3.2% - -------------------------------------------------------------------------------------------------- Barclays PLC 4,427,310 $ 55,450,801 DBS Group Holdings Ltd. 2,972,000 33,997,013 Deutsche Postbank AG 283,540 22,133,964 --------------- $ 111,581,778 - -------------------------------------------------------------------------------------------------- Metals & Mining - 3.5% - -------------------------------------------------------------------------------------------------- BHP Billiton PLC 3,657,400 $ 69,739,474 Companhia Siderurgica Nacional S.A., ADR (l) 416,140 12,201,225 Companhia Vale do Rio Doce, ADR 13,070 280,221 POSCO 124,110 31,179,200 Ternium S.A., ADR (n) 376,230 9,484,758 --------------- $ 122,884,878 - -------------------------------------------------------------------------------------------------- Natural Gas - Distribution - 0.8% - -------------------------------------------------------------------------------------------------- Tokyo Gas Co. Ltd. (l) 4,975,390 $ 26,503,185 - -------------------------------------------------------------------------------------------------- Natural Gas - Pipeline - 0.4% - -------------------------------------------------------------------------------------------------- Gazprom OAO, ADR 299,900 $ 14,125,290 - -------------------------------------------------------------------------------------------------- Network & Telecom - 0.3% - -------------------------------------------------------------------------------------------------- TomTom N.V. (n) 227,190 $ 9,269,306 - -------------------------------------------------------------------------------------------------- Oil Services - 0.6% - -------------------------------------------------------------------------------------------------- Saipem S.p.A 509,980 $ 11,434,746 Vallourec S.A 47,490 10,649,401 --------------- $ 22,084,147 - -------------------------------------------------------------------------------------------------- Other Banks & Diversified Financials - 21.5% - -------------------------------------------------------------------------------------------------- AEON Credit Service Co. Ltd. 921,200 $ 22,062,320 Aiful Corp. 153,700 6,156,908 Akbank T.A.S 3,860,857 21,087,496 Banco Bilbao Vizcaya Argentaria S.A. (l) 949,410 21,703,692 Banco Nossa Caixa S.A 443,590 8,896,616 Bangkok Bank Public Co. Ltd. 4,816,400 14,098,031 Bank of Cyprus Public Co. Ltd. 918,026 8,634,476 BNP Paribas (l) 631,643 67,138,718 Credit Agricole S.A. (l) 1,054,291 42,839,235 CSU Cardsystem S.A. (n) 1,414,690 7,149,296 DEPFA Bank PLC 445,560 8,290,062 Erste Bank der Oesterreichischen Sparkassen AG 469,158 28,375,668 Hana Financial Group, Inc. 337,420 14,549,110 HSBC Holdings PLC 3,488,916 63,336,717 Mitsubishi Tokyo Financial Group, Inc. 4,034 55,010,654 ORIX Corp. (l) 112,160 29,777,414 OTP Bank Ltd., GDR 259,250 15,166,125 Royal Bank of Scotland Group PLC 1,807,901 61,369,767 Shinsei Bank Ltd. 3,426,000 21,111,378 SinoPac Holdings 28,787,000 12,600,356 Sumitomo Mitsui Financial Group, Inc. 5,079 57,140,373 Svenska Handelsbanken AB, "A" (l) 676,200 17,632,455 Takefuji Corp. (l) 128,050 6,908,348 UBS AG (l) 1,186,600 67,176,046 Unibanco - Uniao de Bancos Brasileiros S.A., ADR 363,930 26,330,336 UniCredito Italiano S.p.A. (l) 5,116,570 40,813,444 --------------- $ 745,355,041 - -------------------------------------------------------------------------------------------------- Pharmaceuticals - 7.0% - -------------------------------------------------------------------------------------------------- Astellas Pharma, Inc. 1,047,100 $ 42,480,150 GlaxoSmithKline PLC 4,032,740 114,307,647 Novartis AG 757,150 43,233,185 Roche Holding AG 225,060 41,507,042 --------------- $ 241,528,024 - -------------------------------------------------------------------------------------------------- Specialty Chemicals - 1.2% - -------------------------------------------------------------------------------------------------- Asahi Glass Co. Ltd. (l) 1,828,000 $ 23,993,182 Lonza Group AG 257,420 16,801,452 --------------- $ 40,794,634 - -------------------------------------------------------------------------------------------------- Specialty Stores - 1.6% - -------------------------------------------------------------------------------------------------- Grupo Elektra S.A. de C.V 874,410 $ 8,477,016 NEXT PLC 889,380 28,241,977 Yamada Denki Co. Ltd. (l) 183,800 19,738,174 --------------- $ 56,457,167 - -------------------------------------------------------------------------------------------------- Telecommunications - Wireless - 1.3% - -------------------------------------------------------------------------------------------------- America Movil S.A. de C.V., "L", ADR 420,030 $ 15,671,319 PT Indonesian Satellite Corp. Tbk 9,181,500 4,431,129 Rogers Communications, Inc., "B" 500,430 25,822,215 --------------- $ 45,924,663 - -------------------------------------------------------------------------------------------------- Telephone Services - 3.8% - -------------------------------------------------------------------------------------------------- France Telecom S.A. (l) 1,189,440 $ 25,255,154 Singapore Telecomm 21,205,900 33,556,411 Telenor A.S.A. (l) 2,473,250 31,303,000 TELUS Corp. 830,640 40,793,211 --------------- $ 130,907,776 - -------------------------------------------------------------------------------------------------- Utilities - Electric Power - 4.3% - -------------------------------------------------------------------------------------------------- E.ON AG (l) 545,810 $ 69,352,636 Equatorial Energia S.A., IEU (n) 1,644,580 11,998,917 Iberdrola S.A 1,206,960 44,820,451 SUEZ S.A. (l) 533,768 22,830,942 --------------- $ 149,002,946 - -------------------------------------------------------------------------------------------------- TOTAL COMMON STOCKS (IDENTIFIED COST, $2,958,448,072) $ 3,429,666,108 - -------------------------------------------------------------------------------------------------- Short-Term Obligations - 1.0% - -------------------------------------------------------------------------------------------------- General Electric Co., 5.27%, due 9/01/06, at Amortized Cost and Value (y) $ 33,931,000 $ 33,931,000 - -------------------------------------------------------------------------------------------------- Collateral for Securities Loaned - 11.8% - -------------------------------------------------------------------------------------------------- Navigator Securities Lending Prime Portfolio, at Cost and Net Asset Value 408,737,846 $ 408,737,846 - -------------------------------------------------------------------------------------------------- TOTAL INVESTMENTS (IDENTIFIED COST, $3,401,116,918) $ 3,872,334,954 - -------------------------------------------------------------------------------------------------- Other Assets, Less Liabilities - (11.7)% (406,344,831) - -------------------------------------------------------------------------------------------------- NET ASSETS - 100.0% $ 3,465,990,123 - -------------------------------------------------------------------------------------------------- (l) All or a portion of this security is on loan. (n) Non-income producing security. (y) The rate shown represents an annualized yield at time of purchase. The following abbreviations are used in this report and are defined: ADR American Depository Receipt GDR Global Depository Receipt IEU International Equity Unit IPS International Preference Stock SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENT OF ASSETS AND LIABILITIES At 8/31/06 This statement represents your fund's balance sheet, which details the assets and liabilities comprising the total value of the fund. ASSETS - ------------------------------------------------------------------------------------------------------- Investments, at value, including $389,579,190 of securities on loan (identified cost, $3,401,116,918) $3,872,334,954 Cash 219 Foreign currency, at value (identified cost, $11,692,860) 11,631,948 Receivable for investments sold 4,812,068 Receivable for fund shares sold 7,793,979 Interest and dividends receivable 4,608,838 Other assets 10,793 - ------------------------------------------------------------------------------------------------------- Total assets $3,901,192,799 - ------------------------------------------------------------------------------------------------------- LIABILITIES - ------------------------------------------------------------------------------------------------------- Payable for investments purchased $14,148,520 Payable for fund shares reacquired 11,382,125 Collateral for securities loaned, at value 408,737,846 Payable to affiliates Management fee 149,517 Shareholder servicing costs 150,289 Distribution and service fees 47,222 Administrative services fee 3,007 Program manager fees 35 Retirement plan administration and services fees 863 Payable for independent trustees' compensation 29,893 Accrued expenses and other liabilities 553,359 - ------------------------------------------------------------------------------------------------------- Total liabilities $435,202,676 - ------------------------------------------------------------------------------------------------------- Net assets $3,465,990,123 - ------------------------------------------------------------------------------------------------------- NET ASSETS CONSIST OF - ------------------------------------------------------------------------------------------------------- Paid-in capital $2,677,655,437 Unrealized appreciation (depreciation) on investments and translation of assets and liabilities in foreign currencies 471,218,230 Accumulated net realized gain (loss) on investments and foreign currency transactions 272,540,082 Undistributed net investment income 44,576,374 - ------------------------------------------------------------------------------------------------------- Net assets $3,465,990,123 - ------------------------------------------------------------------------------------------------------- Shares of beneficial interest outstanding 177,201,288 - ------------------------------------------------------------------------------------------------------- Statement of Assets and Liabilities - continued Class A shares - ------------------------------------------------------------------------------------------------------- Net assets $1,344,753,714 Shares outstanding 69,181,469 - ------------------------------------------------------------------------------------------------------- Net asset value per share $19.44 - ------------------------------------------------------------------------------------------------------- Offering price per share (100/94.25Xnet asset value per share) $20.63 - ------------------------------------------------------------------------------------------------------- Class B shares - ------------------------------------------------------------------------------------------------------- Net assets $184,341,111 Shares outstanding 9,893,789 - ------------------------------------------------------------------------------------------------------- Net asset value and offering price per share $18.63 - ------------------------------------------------------------------------------------------------------- Class C shares - ------------------------------------------------------------------------------------------------------- Net assets $158,564,254 Shares outstanding 8,540,308 - ------------------------------------------------------------------------------------------------------- Net asset value and offering price per share $18.57 - ------------------------------------------------------------------------------------------------------- Class I shares - ------------------------------------------------------------------------------------------------------- Net assets $1,565,596,481 Shares outstanding 78,597,122 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $19.92 - ------------------------------------------------------------------------------------------------------- Class W shares - ------------------------------------------------------------------------------------------------------- Net assets $1,033,183 Shares outstanding 53,111 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $19.45 - ------------------------------------------------------------------------------------------------------- Class R shares - ------------------------------------------------------------------------------------------------------- Net assets $69,507,284 Shares outstanding 3,603,060 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $19.29 - ------------------------------------------------------------------------------------------------------- Class R1 shares - ------------------------------------------------------------------------------------------------------- Net assets $2,027,319 Shares outstanding 109,615 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $18.49 - ------------------------------------------------------------------------------------------------------- Class R2 shares - ------------------------------------------------------------------------------------------------------- Net assets $1,021,494 Shares outstanding 54,957 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $18.59 - ------------------------------------------------------------------------------------------------------- Class R3 shares - ------------------------------------------------------------------------------------------------------- Net assets $13,798,576 Shares outstanding 722,071 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $19.11 - ------------------------------------------------------------------------------------------------------- Statement of Assets and Liabilities - continued Class R4 shares - ------------------------------------------------------------------------------------------------------- Net assets $12,795,762 Shares outstanding 660,021 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $19.39 - ------------------------------------------------------------------------------------------------------- Class R5 shares - ------------------------------------------------------------------------------------------------------- Net assets $109,992,672 Shares outstanding 5,650,560 - ------------------------------------------------------------------------------------------------------- Net asset value, offering price, and redemption price per share $19.47 - ------------------------------------------------------------------------------------------------------- Class 529A shares - ------------------------------------------------------------------------------------------------------- Net assets $1,552,197 Shares outstanding 80,560 - ------------------------------------------------------------------------------------------------------- Net asset value per share $19.27 - ------------------------------------------------------------------------------------------------------- Offering price per share (100/94.25Xnet asset value per share) $20.45 - ------------------------------------------------------------------------------------------------------- Class 529B shares - ------------------------------------------------------------------------------------------------------- Net assets $356,065 Shares outstanding 19,321 - ------------------------------------------------------------------------------------------------------- Net asset value and offering price per share $18.43 - ------------------------------------------------------------------------------------------------------- Class 529C shares - ------------------------------------------------------------------------------------------------------- Net assets $650,011 Shares outstanding 35,324 - ------------------------------------------------------------------------------------------------------- Net asset value and offering price per share $18.40 - ------------------------------------------------------------------------------------------------------- On sales of $50,000 or more, the offering prices of Class A and Class 529A shares are reduced. A contingent deferred sales charge may be imposed on redemptions of Class A, Class B, Class C, Class 529B, and Class 529C shares. SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENT OF OPERATIONS Year ended 8/31/06 This statement describes how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations. NET INVESTMENT INCOME - ------------------------------------------------------------------------------------------------------ Income Dividends $69,561,723 Interest 4,056,325 Foreign taxes withheld (6,190,634) - ------------------------------------------------------------------------------------------------------ Total investment income $67,427,414 - ------------------------------------------------------------------------------------------------------ Expenses Management fee $21,859,997 Distribution and service fees 7,383,465 Program manager fees 4,749 Shareholder servicing costs 4,068,376 Administrative services fee 349,690 Retirement plan administration and services fees 95,822 Independent trustees' compensation 51,744 Custodian fee 2,103,837 Shareholder communications 236,525 Auditing fees 50,467 Legal fees 59,000 Miscellaneous 420,991 - ------------------------------------------------------------------------------------------------------ Total expenses $36,684,663 - ------------------------------------------------------------------------------------------------------ Fees paid indirectly (226,196) Reduction of expenses by investment adviser (22,358) - ------------------------------------------------------------------------------------------------------ Net expenses $36,436,109 - ------------------------------------------------------------------------------------------------------ Net investment income $30,991,305 - ------------------------------------------------------------------------------------------------------ Statement of Operations - continued REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS - ------------------------------------------------------------------------------------------------------ Realized gain (loss) (identified cost basis) Investment transactions (net of $119,480 country tax) $380,616,669 Foreign currency transactions (1,022,655) - ------------------------------------------------------------------------------------------------------ Net realized gain (loss) on investments and foreign currency transactions $379,594,014 - ------------------------------------------------------------------------------------------------------ Change in unrealized appreciation (depreciation) Investments (net of $57,340 decrease in deferred country tax) $209,294,383 Translation of assets and liabilities in foreign currencies (3,798) - ------------------------------------------------------------------------------------------------------ Net unrealized gain (loss) on investments and foreign currency translation $209,290,585 - ------------------------------------------------------------------------------------------------------ Net realized and unrealized gain (loss) on investments and foreign currency $588,884,599 - ------------------------------------------------------------------------------------------------------ Change in net assets from operations $619,875,904 - ------------------------------------------------------------------------------------------------------ SEE NOTES TO FINANCIAL STATEMENTS Financial Statements STATEMENTS OF CHANGES IN NET ASSETS These statements describe the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions. YEARS ENDED 8/31 -------------------------------------- 2006 2005 CHANGE IN NET ASSETS FROM OPERATIONS - ------------------------------------------------------------------------------------------------------- Net investment income $30,991,305 $14,478,147 Net realized gain (loss) on investments and foreign currency transactions 379,594,014 145,187,506 Net unrealized gain (loss) on investments and foreign currency translation 209,290,585 171,427,529 - ------------------------------------------------------------------------------------------------------- Change in net assets from operations $619,875,904 $331,093,182 - ------------------------------------------------------------------------------------------------------- DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------- From net investment income Class A $(7,372,365) $(3,826,893) Class B (226,370) (10,565) Class C (254,257) (77,330) Class I (9,060,373) (4,400,339) Class R (303,000) (170,724) Class R1 (2,858) -- Class R2 (1,155) -- Class R3 (29,271) (4,202) Class R4 (1,034) -- Class R5 (523) -- Class 529A (4,962) (2,107) Class 529B (80) (115) Class 529C (10) (151) Statements of Changes in Net Assets - continued YEARS ENDED 8/31 -------------------------------------- 2006 2005 From net realized gain on investments and foreign currency transactions Class A $(80,787,062) $(30,675,820) Class B (12,159,865) (5,867,774) Class C (9,704,848) (3,969,467) Class I (70,748,663) (23,687,787) Class R (3,873,527) (1,210,411) Class R1 (33,799) -- Class R2 (13,584) -- Class R3 (346,752) (24,101) Class R4 (9,270) -- Class R5 (4,369) -- Class 529A (70,615) (18,925) Class 529B (15,904) (6,169) Class 529C (39,146) (14,528) - ------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(195,063,662) $(73,967,408) - ------------------------------------------------------------------------------------------------------- Change in net assets from fund share transactions $931,454,179 $577,345,880 - ------------------------------------------------------------------------------------------------------- Redemption fees $-- $3,533 - ------------------------------------------------------------------------------------------------------- Total change in net assets $1,356,266,421 $834,475,187 - ------------------------------------------------------------------------------------------------------- NET ASSETS - ------------------------------------------------------------------------------------------------------- At beginning of period 2,109,723,702 1,275,248,515 At end of period (including undistributed net investment income of $44,576,374 and $13,039,912, respectively) $3,465,990,123 $2,109,723,702 - ------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Statements FINANCIAL HIGHLIGHTS The financial highlights table is intended to help you understand the fund's financial performance for the past 5 years (or life of a particular share class, if shorter). Certain information reflects financial results for a single fund share. The total returns in the table represent the rate by which an investor would have earned (or lost) on an investment in the fund share class (assuming reinvestment of all distributions) held for the entire period. This information has been audited by the fund's independent registered public accounting firm, whose report, together with the fund's financial statements, are included in this report. CLASS A YEARS ENDED 8/31 -------------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $16.65 $14.25 $11.53 $10.78 $12.25 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment income (loss) (d) $0.19 $0.12 $0.10 $0.04 $(0.00)(w) Net realized and unrealized gain (loss) on investments and foreign currency 4.08 3.04 2.63 0.71 (1.47) - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $4.27 $3.16 $2.73 $0.75 $(1.47) - -------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - -------------------------------------------------------------------------------------------------------------------------- From net investment income $(0.12) $(0.08) $(0.01) $-- $-- From net realized gain on investments and foreign currency transactions (1.36) (0.68) -- -- -- - -------------------------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(1.48) $(0.76) $(0.01) $-- $-- - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $19.44 $16.65 $14.25 $11.53 $10.78 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 27.18 22.67 23.65 6.96 (12.00) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.43 1.52 1.61 1.80 1.86 Expenses after expense reductions (f) 1.43 1.55(e) 1.67(e) 1.75 1.77 Net investment income (loss) 1.06 0.80 0.75 0.36 (0.02) Portfolio turnover 85 79 102 96 153 Net assets at end of period (000 Omitted) $1,344,754 $958,878 $593,574 $387,732 $313,418 - -------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS B YEARS ENDED 8/31 ------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $16.02 $13.76 $11.19 $10.54 $12.04 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment income (loss) (d) $0.07 $0.01 $0.02 $(0.03) $(0.08) Net realized and unrealized gain (loss) on investments and foreign currency 3.93 2.93 2.55 0.68 (1.42) - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $4.00 $2.94 $2.57 $0.65 $(1.50) - -------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - -------------------------------------------------------------------------------------------------------------------------- From net investment income $(0.03) $(0.00)(w) $-- $-- $-- From net realized gain on investments and foreign currency transactions (1.36) (0.68) -- -- -- - -------------------------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(1.39) $(0.68) $-- $-- $-- - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $18.63 $16.02 $13.76 $11.19 $10.54 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 26.36 21.77 22.97 6.17 (12.46) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.08 2.17 2.25 2.45 2.51 Expenses after expense reductions (f) 2.08 2.20(e) 2.31(e) 2.40 2.42 Net investment income (loss) 0.40 0.08 0.12 (0.32) (0.69) Portfolio turnover 85 79 102 96 153 Net assets at end of period (000 Omitted) $184,341 $141,515 $116,165 $88,177 $82,659 - -------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS C YEARS ENDED 8/31 ----------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $15.98 $13.73 $11.17 $10.52 $12.02 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment income (loss) (d) $0.07 $0.02 $0.02 $(0.03) $(0.08) Net realized and unrealized gain (loss) on investments and foreign currency 3.92 2.92 2.54 0.68 (1.42) - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $3.99 $2.94 $2.56 $0.65 $(1.50) - -------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - -------------------------------------------------------------------------------------------------------------------------- From net investment income $(0.04) $(0.01) $-- $-- $-- From net realized gain on investments and foreign currency transactions (1.36) (0.68) -- -- -- - -------------------------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(1.40) $(0.69) $-- $-- $-- - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $18.57 $15.98 $13.73 $11.17 $10.52 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 26.38 21.84 22.92 6.18 (12.48) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.08 2.17 2.25 2.45 2.51 Expenses after expense reductions (f) 2.08 2.20(e) 2.31(e) 2.40 2.42 Net investment income (loss) 0.41 0.13 0.15 (0.32) (0.09) Portfolio turnover 85 79 102 96 153 Net assets at end of period (000 Omitted) $158,564 $109,347 $75,580 $46,022 $43,046 - -------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS I YEARS ENDED 8/31 --------------------------------------------------------------------------- 2006 2005 2004 2003 2002 Net asset value, beginning of period $17.02 $14.54 $11.75 $10.95 $12.39 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.26 $0.19 $0.16 $0.10 $0.04 Net realized and unrealized gain (loss) on investments and foreign currency 4.17 3.10 2.66 0.70 (1.48) - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $4.43 $3.29 $2.82 $0.80 $(1.44) - -------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - -------------------------------------------------------------------------------------------------------------------------- From net investment income $(0.17) $(0.13) $(0.03) $-- $-- From net realized gain on investments and foreign currency transactions (1.36) (0.68) -- -- -- - -------------------------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(1.53) $(0.81) $(0.03) $-- $-- - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $19.92 $17.02 $14.54 $11.75 $10.95 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 27.61 23.09 24.05 7.31 (11.62) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.08 1.17 1.26 1.45 1.51 Expenses after expense reductions (f) 1.08 1.20(e) 1.32(e) 1.40 1.42 Net investment income 1.41 1.18 1.18 0.95 0.38 Portfolio turnover 85 79 102 96 153 Net assets at end of period (000 Omitted) $1,565,596 $851,484 $469,181 $232,328 $18,207 - -------------------------------------------------------------------------------------------------------------------------- CLASS W YEAR ENDED ------------ 8/31/06(i) Net asset value, beginning of period $19.54 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.04 Net realized and unrealized gain (loss) on investments and foreign currency (0.13)(g) - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $(0.09) - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $19.45 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) (0.46)(n) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.20(a) Expenses after expense reductions (f) 1.20(a) Net investment income 1.02(a) Portfolio turnover 85 Net assets at end of period (000 Omitted) $1,033 - -------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R YEARS ENDED 8/31 ---------------------------------------------------------- 2006 2005 2004 2003(i) Net asset value, beginning of period $16.54 $14.20 $11.52 $10.32 - ------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------------------- Net investment income (loss) (d) $0.17 $0.11 $0.09 $(0.01) Net realized and unrealized gain (loss) on investments and foreign currency 4.05 3.01 2.61 1.21 - ------------------------------------------------------------------------------------------------------------------------- Total from investment operations $4.22 $3.12 $2.70 $1.20 - ------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------------------- From net investment income $(0.11) $(0.10) $(0.02) $-- From net realized gain on investments and foreign currency transactions (1.36) (0.68) -- -- - ------------------------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(1.47) $(0.78) $(0.02) $-- - ------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $19.29 $16.54 $14.20 $11.52 - ------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 26.98 22.40 23.50 11.63(n) - ------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.58 1.66 1.75 1.95(a) Expenses after expense reductions (f) 1.58 1.69(e) 1.81(e) 1.90(a) Net investment income (loss) 0.95 0.73 0.69 (0.09)(a) Portfolio turnover 85 79 102 96 Net assets at end of period (000 Omitted) $69,507 $44,300 $19,596 $4,810 - ------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R1 YEARS ENDED 8/31 --------------------------- 2006 2005(i) Net asset value, beginning of period $16.02 $15.07 - ------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.11 $0.03 Net realized and unrealized gain (loss) on investments and foreign currency 3.84 0.92 - ------------------------------------------------------------------------------------------------------------- Total from investment operations $3.95 $0.95 - ------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------- From net investment income $(0.12) $-- From net realized gain on investments and foreign currency transactions (1.36) -- - ------------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(1.48) $-- - ------------------------------------------------------------------------------------------------------------- Net asset value, end of period $18.49 $16.02 - ------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 26.12 6.30(n) - ------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.26 2.36(a) Expenses after expense reductions (f) 2.16 2.39(a)(e) Net investment income 0.65 0.46(a) Portfolio turnover 85 79 Net assets at end of period (000 Omitted) $2,027 $171 - ------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R2 YEARS ENDED 8/31 ---------------------------- 2006 2005(i) Net asset value, beginning of period $16.04 $15.07 - ------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.14 $0.06 Net realized and unrealized gain (loss) on investments and foreign currency 3.89 0.91 - ------------------------------------------------------------------------------------------------------------- Total from investment operations $4.03 $0.97 - ------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------- From net investment income $(0.12) $-- From net realized gain on investments and foreign currency transactions (1.36) -- - ------------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(1.48) $-- - ------------------------------------------------------------------------------------------------------------- Net asset value, end of period $18.59 $16.04 - ------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 26.63 6.44(n) - ------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.96 2.04(a) Expenses after expense reductions (f) 1.82 2.07(a)(e) Net investment income 0.83 1.12(a) Portfolio turnover 85 79 Net assets at end of period (000 Omitted) $1,021 $178 - ------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R3 YEARS ENDED 8/31 -------------------------------------------- 2006 2005 2004(i) Net asset value, beginning of period $16.43 $14.16 $12.71 - --------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - --------------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.15 $0.11 $0.02 Net realized and unrealized gain (loss) on investments and foreign currency 4.01 2.96 1.46 - --------------------------------------------------------------------------------------------------------------------- Total from investment operations $4.16 $3.07 $1.48 - --------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - --------------------------------------------------------------------------------------------------------------------- From net investment income $(0.12) $(0.12) $(0.03) From net realized gain on investments and foreign currency transactions (1.36) (0.68) -- - --------------------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(1.48) $(0.80) $(0.03) - --------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $19.11 $16.43 14.16 - --------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 26.79 22.13 11.69(n) - --------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - --------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.82 1.92 2.01(a) Expenses after expense reductions (f) 1.73 1.95(e) 2.07(a)(e) Net investment income 0.83 0.74 0.18(a) Portfolio turnover 85 79 102 Net assets at end of period (000 Omitted) $13,799 $2,357 $431 - --------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS R4 YEARS ENDED 8/31 ------------------------------- 2006 2005(i) Net asset value, beginning of period $16.65 $15.62 - ------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.25 $0.12 Net realized and unrealized gain (loss) on investments and foreign currency 4.00 0.91 - ------------------------------------------------------------------------------------------------------------- Total from investment operations $4.25 $1.03 - ------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------- From net investment income $(0.15) $-- From net realized gain on investments and foreign currency transactions (1.36) -- - ------------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(1.51) $-- - ------------------------------------------------------------------------------------------------------------- Net asset value, end of period $19.39 $16.65 - ------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 27.07 6.59(n) - ------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.47 1.55(a) Expenses after expense reductions (f) 1.47 1.58(a)(e) Net investment income 1.42 1.79(a) Portfolio turnover 85 79 Net assets at end of period (000 Omitted) $12,796 $53 - ------------------------------------------------------------------------------------------------------------- CLASS R5 YEARS ENDED 8/31 ----------------------------- 2006 2005(i) Net asset value, beginning of period $16.67 $15.62 - ------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - ------------------------------------------------------------------------------------------------------------- Net investment income (d) $0.33 $0.14 Net realized and unrealized gain (loss) on investments and foreign currency 3.99 0.91 - ------------------------------------------------------------------------------------------------------------- Total from investment operations $4.32 $1.05 - ------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - ------------------------------------------------------------------------------------------------------------- From net investment income $(0.16) $-- From net realized gain on investments and foreign currency transactions (1.36) -- - ------------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(1.52) $-- - ------------------------------------------------------------------------------------------------------------- Net asset value, end of period $19.47 $16.67 - ------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s) 27.50 6.72(n) - ------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.17 1.25(a) Expenses after expense reductions (f) 1.17 1.28(a)(e) Net investment income 1.82 2.09(a) Portfolio turnover 85 79 Net assets at end of period (000 Omitted) $109,993 $53 - ------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS 529A YEARS ENDED 8/31 ----------------------------------------------------------------------- 2006 2005 2004 2003 2002(i) Net asset value, beginning of period $16.53 $14.18 $11.50 $10.78 $10.66 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment income (loss) (d) $0.16 $0.10 $0.08 $0.03 $(0.00)(w) Net realized and unrealized gain (loss) on investments and foreign currency 4.04 3.01 2.61 0.69 0.12 - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $4.20 $3.11 $2.69 $0.72 $0.12 - -------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - -------------------------------------------------------------------------------------------------------------------------- From net investment income $(0.10) $(0.08) $(0.01) $-- $-- From net realized gain on investments and foreign currency transactions (1.36) (0.68) -- -- -- - -------------------------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(1.46) $(0.76) $(0.01) $-- $-- - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $19.27 $16.53 $14.18 $11.50 $10.78 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 26.86 22.35 23.39 6.68 1.13(n) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 1.68 1.76 1.85 2.05 2.11(a) Expenses after expense reductions (f) 1.68 1.79(e) 1.91(e) 2.00 2.02(a) Net investment income (loss) 0.88 0.65 0.62 0.30 (0.20)(a) Portfolio turnover 85 79 102 96 153 Net assets at end of period (000 Omitted) $1,552 $760 $332 $112 $11 - -------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS 529B YEARS ENDED 8/31 ----------------------------------------------------------------------- 2006 2005 2004 2003 2002(i) Net asset value, beginning of period $15.88 $13.68 $11.17 $10.54 $10.42 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment income (loss) (d) $0.03 $(0.02) $(0.00)(w) $(0.05) $(0.00)(w) Net realized and unrealized gain (loss) on investments and foreign currency 3.89 2.91 2.51 0.68 0.12 - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $3.92 $2.89 $2.51 $0.63 $0.12 - -------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - -------------------------------------------------------------------------------------------------------------------------- From net investment income $(0.01) $(0.01) $-- $-- $-- From net realized gain on investments and foreign currency transactions (1.36) (0.68) -- -- -- - -------------------------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(1.37) $(0.69) $-- $-- $-- - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $18.43 $15.88 $13.68 $11.17 $10.54 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 26.06 21.54 22.47 5.98 1.15(n) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.33 2.42 2.50 2.70 2.76(a) Expenses after expense reductions (f) 2.33 2.45(e) 2.56(e) 2.65 2.67(a) Net investment income (loss) 0.15 (0.13) (0.03) (0.43) (0.45)(a) Portfolio turnover 85 79 102 96 153 Net assets at end of period (000 Omitted) $356 $174 $110 $41 $5 - -------------------------------------------------------------------------------------------------------------------------- SEE NOTES TO FINANCIAL STATEMENTS Financial Highlights - continued CLASS 529C YEARS ENDED 8/31 ------------------------------------------------------------------------ 2006 2005 2004 2003 2002(i) Net asset value, beginning of period $15.86 $13.66 $11.14 $10.52 $10.40 - -------------------------------------------------------------------------------------------------------------------------- INCOME (LOSS) FROM INVESTMENT OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment income (loss) (d) $0.03 $(0.01) $(0.00)(w) $(0.04) $(0.00)(w) Net realized and unrealized gain (loss) on investments and foreign currency 3.87 2.90 2.52 0.66 0.12 - -------------------------------------------------------------------------------------------------------------------------- Total from investment operations $3.90 $2.89 $2.52 $0.62 $0.12 - -------------------------------------------------------------------------------------------------------------------------- LESS DISTRIBUTIONS DECLARED TO SHAREHOLDERS - -------------------------------------------------------------------------------------------------------------------------- From net investment income $(0.00)(w) $(0.01) $-- $-- $-- From net realized gain on investments and foreign currency transactions (1.36) (0.68) -- -- -- - -------------------------------------------------------------------------------------------------------------------------- Total distributions declared to shareholders $(1.36) $(0.69) $-- $-- $-- - -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $18.40 $15.86 $13.66 $11.14 $10.52 - -------------------------------------------------------------------------------------------------------------------------- Total return (%) (r)(s)(t) 25.98 21.53 22.62 5.89 1.15(n) - -------------------------------------------------------------------------------------------------------------------------- RATIOS (%) (TO AVERAGE NET ASSETS) AND SUPPLEMENTAL DATA - -------------------------------------------------------------------------------------------------------------------------- Expenses before expense reductions (f) 2.33 2.42 2.49 2.70 2.76(a) Expenses after expense reductions (f) 2.33 2.45(e) 2.55(e) 2.65 2.67(a) Net investment income (loss) 0.16 (0.07) (0.02) (0.36) (0.45)(a) Portfolio turnover 85 79 102 96 153 Net assets at end of period (000 Omitted) $650 $454 $280 $81 $5 - -------------------------------------------------------------------------------------------------------------------------- Any redemption fees charged by the fund during the 2004 and 2005 fiscal years resulted in a per share impact of less than $0.01. (a) Annualized. (d) Per share data are based on average shares outstanding. (e) Ratio includes a reimbursement fee for expenses borne by MFS in prior years under the then existing expense reimbursement agreement. (f) Ratios do not reflect reductions from fees paid indirectly. (g) The per share amount is not in accordance with the net realized and unrealized gain/loss for the period because of the timing of sales of fund shares and the amount of per share realized and unrealized gains and losses at such time. (i) For the period from the class' inception, December 31, 2002 (Class R), July 31, 2002 (Classes 529A, 529B, and 529C), October 31, 2003 (Class R3), April 1, 2005 (Classes R1, R2, R4, and R5) and May 1, 2006 (Class W) through the stated period end. (n) Not annualized. (r) Certain expenses have been reduced without which performance would have been lower. (s) From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower. (t) Total returns do not include any applicable sales charges. (w) Per share amount was less than $0.01. SEE NOTES TO FINANCIAL STATEMENTS NOTES TO FINANCIAL STATEMENTS (1) BUSINESS AND ORGANIZATION MFS Research International Fund (the fund) is a series of MFS Series Trust I (the trust). The trust is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open- end management investment company. (2) SIGNIFICANT ACCOUNTING POLICIES GENERAL - The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The fund can invest in foreign securities, including securities of emerging market issuers. Investments in foreign securities are vulnerable to the effects of changes in the relative values of the local currency and the U.S. dollar and to the effects of changes in each country's legal, political, and economic environment. The markets of emerging markets countries are generally more volatile than the markets of developed countries with more mature economies. All of the risks of investing in foreign securities previously described are heightened when investing in emerging markets countries. INVESTMENT VALUATIONS - Equity securities, including restricted equity securities, are generally valued at the last sale or official closing price as reported by an independent pricing service on the market or exchange on which they are primarily traded. For securities for which there were no sales reported that day, equity securities are generally valued at the last quoted daily bid quotation as reported by an independent pricing service on the market or exchange on which they are primarily traded. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which approximates market value. Open-end investment companies are generally valued at their net asset value per share. Securities and other assets generally valued on the basis of information from an independent pricing service may also be valued at a broker-dealer bid quotation. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates reported by an independent pricing service. The Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund's investments (including any fair valuation) to the adviser pursuant to valuation policies and procedures approved by the Board. If the adviser determines that reliable market quotations are not readily available, investments are valued at fair value as determined in good faith by the adviser in accordance with such procedures under the oversight of the Board of Trustees. Under the fund's valuation policies and procedures, market quotations are not considered to be readily available for many types of debt instruments. These investments are generally valued at fair value based on information from independent pricing services. The adviser may rely on independent pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund's net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of investments used to determine the fund's net asset value may differ from quoted or published prices for the same investments. In addition, investments may be valued at fair value if the adviser determines that an investment's value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund's net asset value, or after the halting of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. Events that occur on a frequent basis after foreign markets close (such as developments in foreign markets and significant movements in the U.S. markets) and prior to the determination of the fund's net asset value may be deemed to have a material affect on the value of securities traded in foreign markets. Accordingly, the fund's foreign equity securities may often be valued at fair value. REPURCHASE AGREEMENTS - The fund may enter into repurchase agreements with institutions that the fund's investment adviser has determined are creditworthy. Each repurchase agreement is recorded at cost. The fund requires that the securities collateral in a repurchase transaction be transferred to the custodian in a manner sufficient to enable the fund to obtain those securities in the event of a default under the repurchase agreement. The fund monitors, on a daily basis, the value of the collateral to ensure that its value, including accrued interest, is greater than amounts owed to the fund under each such repurchase agreement. The fund, along with other affiliated entities of Massachusetts Financial Services Company (MFS), may utilize a joint trading account for the purpose of entering into one or more repurchase agreements. FOREIGN CURRENCY TRANSLATION - Purchases and sales of foreign investments, income, and expenses are converted into U.S. dollars based upon currency exchange rates prevailing on the respective dates of such transactions. Gains and losses attributable to foreign currency exchange rates on sales of securities are recorded for financial statement purposes as net realized gains and losses on investments. Gains and losses attributable to foreign exchange rate movements on income and expenses are recorded for financial statement purposes as foreign currency transaction gains and losses. That portion of both realized and unrealized gains and losses on investments that results from fluctuations in foreign currency exchange rates is not separately disclosed. SECURITY LOANS - State Street Bank and Trust Company ("State Street"), as lending agent, may loan the securities of the fund to certain qualified institutions (the "Borrowers") approved by the fund. The loans are collateralized at all times by cash and/or U.S. Treasury securities in an amount at least equal to the market value of the securities loaned. State Street provides the fund with indemnification against Borrower default. The fund bears the risk of loss with respect to the investment of cash collateral. On loans collateralized by cash, the cash collateral is invested in a money market fund or short-term securities. A portion of the income generated upon investment of the collateral is remitted to the Borrowers, and the remainder is allocated between the fund and the lending agent. On loans collateralized by U.S. Treasury securities, a fee is received from the Borrower, and is allocated between the fund and the lending agent. Income from securities lending is included in interest income on the Statement of Operations. The dividend and interest income earned on the securities loaned is accounted for in the same manner as other dividend and interest income. SHORT TERM FEES - For purchases made on or after July 1, 2004 and before April 1, 2005, the fund charged a 2% redemption fee on proceeds from Class A, Class B, Class C, and Class I shares redeemed or exchanged within 5 business days following their acquisition. Effective April 1, 2005, the fund no longer charges a redemption fee. See the fund's prospectus for details. Any redemption fees charged are accounted for as an addition to paid-in-capital. INVESTMENT TRANSACTIONS AND INCOME - Investment transactions are recorded on the trade date. Interest income is recorded on the accrual basis. All premium and discount is amortized or accreted for financial statement purposes in accordance with U.S. generally accepted accounting principles. All discount is accreted for tax reporting purposes as required by federal income tax regulations. Dividends received in cash are recorded on the ex-dividend date. Certain dividends from foreign securities will be recorded when the fund is informed of the dividend if such information is obtained subsequent to the ex- dividend date. Dividend and interest payments received in additional securities are recorded on the ex-dividend or ex-interest date in an amount equal to the value of the security on such date. The fund may receive proceeds from litigation settlements involving its portfolio holdings. Any proceeds received are reflected in realized gain/loss in the Statement of Operations, or in unrealized gain/loss if the security is still held by the fund. FEES PAID INDIRECTLY - The fund's custody fee is reduced according to an arrangement that measures the value of cash deposited with the custodian by the fund. During the year ended August 31, 2006, the fund's custodian fees were reduced by $198,124 under this arrangement. The fund has entered into a commission recapture agreement, under which certain brokers will credit the fund a portion of the commissions generated, to offset certain expenses of the fund. For the year ended August 31, 2006, the fund's custodian expenses were reduced by $28,072 under this agreement. These amounts are shown as a reduction of total expenses on the Statement of Operations. Effective January 1, 2006, the commission recapture agreement was terminated. TAX MATTERS AND DISTRIBUTIONS - The fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable income, including realized capital gains. Accordingly, no provision for federal income tax is required in the financial statements. Foreign taxes, if any, have been accrued by the fund in the accompanying financial statements. Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future. Distributions in excess of net investment income or net realized gains are temporary overdistributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions for financial statement and tax purposes. Book/tax differences primarily relate to foreign currency transactions, wash sales loss deferrals, passive foreign investment companies, and treating a portion of the proceeds from redemptions as a distribution for tax purposes. The tax character of distributions declared to shareholders is as follows: 8/31/06 8/31/05 Ordinary income (including any short-term capital gains) $104,557,669 $8,492,426 Long-term capital gain 90,505,993 65,474,982 - ------------------------------------------------------------------------------- Total distributions $195,063,662 $73,967,408 The federal tax cost and the tax basis components of distributable earnings were as follows: AS OF 8/31/06 Cost of investments $3,418,643,330 ------------------------------------------------------------ Gross appreciation $478,900,076 Gross depreciation (25,208,452) ------------------------------------------------------------ Net unrealized appreciation (depreciation) $453,691,624 Undistributed ordinary income 179,019,881 Undistributed long-term capital gain 155,812,624 Other temporary differences (189,443) In June 2006, FASB Interpretation No. 48, Accounting for Uncertainty in Income Taxes (the "Interpretation") was issued, and is effective for fiscal years beginning after December 15, 2006 and is to be applied to all open tax years as of the effective date. This Interpretation prescribes a minimum threshold for financial statement recognition of the benefit of a tax position taken or expected to be taken in a tax return, and requires certain expanded disclosures. Management has recently begun to evaluate the application of the Interpretation to the fund, and has not at this time determined the impact, if any, resulting from the adoption of this Interpretation on the fund's financial statements. MULTIPLE CLASSES OF SHARES OF BENEFICIAL INTEREST - The fund offers multiple classes of shares, which differ in their respective distribution and service fees. All shareholders bear the common expenses of the fund based on daily net assets of each class, without distinction between share classes. Dividends are declared separately for each class. Differences in per share dividend rates are generally due to differences in separate class expenses. Class B and Class 529B shares will convert to Class A and Class 529A shares, respectively, approximately eight years after purchase. (3) TRANSACTIONS WITH AFFILIATES INVESTMENT ADVISER - The fund has an investment advisory agreement with Massachusetts Financial Services Company (MFS) to provide overall investment management and related administrative services and facilities to the fund. The management fee is computed daily and paid monthly at the following annual rates: First $1.0 billion of average daily net assets 0.90% Next $1.0 billion of average daily net assets 0.80% Average daily net assets in excess of $2.0 billion 0.70% The management fee incurred for the year ended August 31, 2006 was equivalent to an annual effective rate of 0.81% of the fund's average daily net assets. The investment adviser has agreed in writing to pay a portion of the fund's operating expenses, exclusive of management, distribution and service, retirement plan administration and services, program manager, and certain other fees and expenses, such that operating expenses do not exceed 0.40% annually of the fund's average daily net assets. This written agreement will continue through December 31, 2006 unless changed or rescinded by the fund's Board of Trustees. For the year ended August 31, 2006, the fund's actual operating expenses did not exceed the limit and therefore, the investment adviser did not pay any portion of the fund's expenses. DISTRIBUTOR - MFS Fund Distributors, Inc. (MFD), a wholly-owned subsidiary of MFS, as distributor, received $142,680 and $2,585 for the year ended August 31, 2006, as its portion of the initial sales charge on sales of Class A and Class 529A shares of the fund, respectively. The Board of Trustees has adopted a distribution plan for certain class shares pursuant to Rule 12b-1 of the Investment Company Act of 1940. The fund's distribution plan provides that the fund will pay MFD for services provided by MFD and financial intermediaries in connection with the distribution and servicing of certain share classes. One component of the plan is a distribution fee paid to MFD and another component of the plan is a service fee paid to MFD. MFD may subsequently pay all, or a portion, of the distribution and/or service fees to financial intermediaries. Distribution Fee Plan Table: TOTAL ANNUAL DISTRIBUTION DISTRIBUTION SERVICE DISTRIBUTION EFFECTIVE AND SERVICE FEE RATE FEE RATE PLAN(d) RATE(e) FEE Class A 0.10% 0.25% 0.35% 0.35% $4,007,355 Class B 0.75% 0.25% 1.00% 1.00% 1,665,636 Class C 0.75% 0.25% 1.00% 1.00% 1,355,997 Class W 0.10% -- 0.10% 0.10% 55 Class R 0.25% 0.25% 0.50% 0.50% 290,312 Class R1 0.50% 0.25% 0.75% 0.75% 6,800 Class R2 0.25% 0.25% 0.50% 0.50% 1,680 Class R3 0.25% 0.25% 0.50% 0.50% 34,752 Class R4 -- 0.25% 0.25% 0.25% 9,100 Class 529A 0.25% 0.25% 0.50% 0.35% 3,888 Class 529B 0.75% 0.25% 1.00% 1.00% 2,399 Class 529C 0.75% 0.25% 1.00% 1.00% 5,491 - --------------------------------------------------------------------------------------------------------------------- Total Distribution and Service Fees $7,383,465 (d) In accordance with the distribution plan for certain classes, the fund pays distribution and/or service fees up to these annual percentage rates of each class' average daily net assets. (e) The annual effective rates represent actual fees incurred under the distribution plan for the year ended August 31, 2006 based on each class' average daily net assets. 0.10% of the Class 529A distribution fee is currently being paid by the fund. Payment of the remaining 0.15% of the Class 529A distribution fee is not yet in effect and will be implemented on such date as the fund's Board of Trustees may determine. Certain Class A, Class C and Class 529C shares are subject to a contingent deferred sales charge in the event of a shareholder redemption within 12 months of purchase. Class B and Class 529B shares are subject to a contingent deferred sales charge in the event of a shareholder redemption within six years of purchase. All contingent deferred sales charges are paid to MFD and during the year ended August 31, 2006, were as follows: AMOUNT Class A $31,305 Class B 159,607 Class C 23,097 Class 529B -- Class 529C -- The fund has entered into and may from time to time enter into contracts with program managers and other parties which administer the tuition programs through which an investment in the fund's 529 share classes is made. The fund has entered into an agreement with MFD pursuant to which MFD receives an annual fee of up to 0.35% of the average daily net assets attributable to each 529 share class. The fee is based on average daily net assets and is currently established at 0.25% annually of average daily net assets of the fund's 529 share classes. The fee may only be increased with the approval of the Board of Trustees who oversees the fund. The services provided by MFD, or a third party with which MFD contracts, include recordkeeping and tax reporting and account services, as well as services designed to maintain the program's compliance with the Internal Revenue Code and other regulatory requirements. Program manager fees for the year ended August 31, 2006, were as follows: AMOUNT Class 529A $2,776 Class 529B 600 Class 529C 1,373 -------------------------------------------------- Total Program Manager Fees $4,749 SHAREHOLDER SERVICING AGENT - MFS Service Center, Inc. (MFSC), a wholly-owned subsidiary of MFS, receives a fee from the fund for its services as shareholder servicing agent calculated as a percentage of the average net assets of the fund as determined periodically under the supervision of the fund's Board of Trustees. For the year ended August 31, 2006, the fee was $2,629,928, which equated to 0.0975% annually of the fund's average daily net assets. MFSC also receives payment from the fund for out-of-pocket and sub- accounting expenses paid by MFSC on behalf of the fund. For the year ended August 31, 2006, these costs amounted to $260,010. The fund may also pay shareholder servicing related costs to non-related parties. ADMINISTRATOR - MFS provides certain financial, legal, shareholder communications, compliance, and other administrative services to the fund. Under an administrative services agreement, the fund partially reimburses MFS the costs incurred to provide these services. The fund is charged a fixed amount plus a fee based on calendar year average net assets. From July 1, 2005 through March 31, 2006, the fund's annual fixed amount was $10,000. Effective April 1, 2006, the fund's annual fixed amount is $17,500. The administrative services fee incurred for the year ended August 31, 2006 was equivalent to an annual effective rate of 0.0130% of the fund's average daily net assets. In addition to the administrative services provided by MFS to the fund as described above, MFS is responsible for providing certain retirement plan administration and services with respect to certain shares. These services include various administrative, recordkeeping, and communication/educational services with respect to the retirement plans which invest in these shares, and may be provided directly by MFS or by a third party. MFS may subsequently pay all, or a portion, of the retirement plan administration and services fee to affiliated or unaffiliated third parties. For the year ended August 31, 2006, the fund paid MFS an annual retirement plan administration and services fee up to the following annual percentage rates of each class' average daily net assets: ANNUAL EFFECTIVE TOTAL FEE RATE RATE(g) AMOUNT Class R1 0.45% 0.35% $4,069 Class R2 0.40% 0.26% 1,344 Class R3 0.25% 0.15% 17,376 Class R4 0.15% 0.15% 5,460 Class R5 0.10% 0.10% 67,573 - ------------------------------------------------------------------------------- Total Retirement Plan Administration and Services Fees $95,822 (g) Effective October 1, 2005, MFS has agreed in writing to waive a portion of the retirement plan administration and services fee equal to 0.10% for Class R1 shares, 0.15% for Class R2 shares, and 0.10% for Class R3 shares. This agreement will continue until at least September 30, 2008. For the year ended August 31, 2006, this waiver amounted to $8,044 and is reflected as a reduction of total expenses in the Statement of Operations. TRUSTEES' AND OFFICERS' COMPENSATION - The fund pays compensation to Independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. The fund does not pay compensation directly to Trustees or officers of the fund who are also officers of the investment adviser, all of whom receive remuneration for their services to the fund from MFS. Certain officers and Trustees of the fund are officers or directors of MFS, MFD, and MFSC. The fund has an unfunded, defined benefit plan for certain retired Independent Trustees which resulted in a pension expense of $626. The fund also has an unfunded retirement benefit deferral plan for certain Independent Trustees which resulted in an expense of $4,022. Both amounts are included in Independent trustees' compensation for the year ended August 31, 2006. The deferred liability for retirement benefits payable to certain Trustees under both plans amounted to $29,893 at August 31, 2006, and is included in payable for independent trustees' compensation. OTHER - This fund and certain other MFS funds (the funds) have entered into a services agreement (the Agreement) which provides for payment of fees by the funds to Tarantino LLC in return for the provision of services of an Independent Chief Compliance Officer (ICCO) for the funds. The ICCO is an officer of the funds and the sole member of Tarantino LLC. The funds can terminate the Agreement with Tarantino LLC at any time under the terms of the Agreement. For the year ended August 31, 2006, the fee paid to Tarantino LLC was $16,746. MFS has agreed to reimburse the fund for a portion of the payments made by the funds to Tarantino LLC in the amount of $14,314, which is shown as a reduction of total expenses in the Statement of Operations. Additionally, MFS has agreed to bear all expenses associated with office space, other administrative support, and supplies provided to the ICCO. The investment adviser reimbursed the fund $956,926 for a trade correction. This amount is included in realized gain on investment transactions on the Statement of Operations. (4) PORTFOLIO SECURITIES Purchases and sales of investments, other than U.S. government securities, purchased option transactions, and short-term obligations, aggregated $3,017,421,338 and $2,252,816,148, respectively. (5) SHARES OF BENEFICIAL INTEREST The fund's Declaration of Trust permits the Trustees to issue an unlimited number of full and fractional shares of beneficial interest. Transactions in fund shares were as follows: YEAR ENDED YEAR ENDED 8/31/06(i) 8/31/05(i) SHARES AMOUNT SHARES AMOUNT Shares sold Class A 30,630,255 $556,734,183 28,794,080 $449,353,092 Class B 3,401,167 59,298,455 2,362,199 35,339,373 Class C 3,025,371 52,468,875 2,336,111 34,976,257 Class I 30,755,216 581,780,278 19,429,388 307,426,523 Class W 53,111 1,031,086 -- -- Class R 1,713,782 30,827,673 1,840,882 28,392,688 Class R1 118,411 2,100,359 10,752 164,313 Class R2 46,997 846,131 11,113 173,543 Class R3 805,222 14,237,540 133,725 2,068,055 Class R4 737,220 13,528,900 3,201 50,000 Class R5 6,785,761 117,544,808 3,201 50,000 Class 529A 35,512 640,671 25,961 402,042 Class 529B 7,849 136,554 3,708 53,775 Class 529C 7,149 123,841 8,456 126,224 - ---------------------------------------------------------------------------------------------------------- 78,123,023 $1,431,299,354 54,962,777 $858,575,885 Shares issued to shareholders in reinvestment of distributions Class A 3,732,231 $62,253,599 1,587,913 $24,279,191 Class B 649,122 10,424,911 340,629 5,034,486 Class C 441,721 7,067,535 208,302 3,070,381 Class I 4,619,694 78,765,784 1,781,510 27,773,750 Class R 234,859 3,891,575 86,925 1,321,265 Class R1 2,328 36,657 -- -- Class R2 922 14,739 -- -- Class R3 22,921 376,023 1,871 28,303 Class R4 619 10,304 -- -- Class R5 293 4,892 -- -- Class 529A 4,564 75,577 1,383 21,032 Class 529B 1,005 15,984 428 6,284 Class 529C 2,465 39,156 1,002 14,679 - ---------------------------------------------------------------------------------------------------------- 9,712,744 $162,976,736 4,009,963 $61,549,371 Shares reacquired Class A (22,770,545) $(406,301,939) (14,437,115) $(224,139,499) Class B (2,987,955) (52,111,572) (2,316,453) (34,824,715) Class C (1,768,974) (30,633,224) (1,206,741) (17,997,574) Class I (6,808,899) (127,967,564) (3,443,470) (55,618,095) Class R (1,023,578) (18,415,220) (630,288) (9,740,922) Class R1 (21,804) (394,455) (72) (1,129) Class R2 (4,075) (70,219) -- -- Class R3 (249,484) (4,380,146) (22,619) (345,295) Class R4 (81,019) (1,516,299) -- -- Class R5 (1,138,695) (20,875,810) -- -- Class 529A (5,526) (98,083) (4,742) (74,061) Class 529B (463) (8,063) (1,242) (18,403) Class 529C (2,944) (49,317) (1,323) (19,683) - ----------------------------------------------------------------------------------------------------------- (36,863,961) $(662,821,911) (22,064,065) $(342,779,376) Net change Class A 11,591,941 $212,685,843 15,944,878 $249,492,784 Class B 1,062,334 17,611,794 386,375 5,549,144 Class C 1,698,118 28,903,186 1,337,672 20,049,064 Class I 28,566,011 532,578,498 17,767,428 279,582,178 Class W 53,111 1,031,086 -- -- Class R 925,063 16,304,028 1,297,519 19,973,031 Class R1 98,935 1,742,561 10,680 163,184 Class R2 43,844 790,651 11,113 173,543 Class R3 578,659 10,233,417 112,977 1,751,063 Class R4 656,820 12,022,905 3,201 50,000 Class R5 5,647,359 96,673,890 3,201 50,000 Class 529A 34,550 618,165 22,602 349,013 Class 529B 8,391 144,475 2,894 41,656 Class 529C 6,670 113,680 8,135 121,220 - ---------------------------------------------------------------------------------------------------------- 50,971,806 $931,454,179 36,908,675 $577,345,880 (i) For the period from the class' inception, April 1, 2005 (Classes R1, R2, R4, and R5) and May 1, 2006 (Class W), through the stated period end. The fund is one of several mutual funds in which the MFS funds-of-funds may invest. The MFS funds-of-funds do not invest in the underlying MFS funds for the purpose of exercising management or control. At the end of the period, the MFS Conservative Allocation Fund, MFS International Diversification Fund, MFS Moderate Allocation Fund, MFS Growth Allocation Fund, and the MFS Aggressive Growth Allocation Fund, were the owners of record of approximately 1%, 14%, 6%, 10%, and 3%, respectively, of the value of outstanding voting shares. In addition, the MFS Lifetime 2010 Fund, MFS Lifetime 2020 Fund, MFS Lifetime 2030 Fund, and the MFS Lifetime 2040 Fund were each the owners of record of less than 1% of the value of outstanding voting shares. (6) LINE OF CREDIT The fund and other affiliated funds participate in a $1 billion unsecured committed line of credit provided by a syndication of banks under a credit agreement. In addition, the fund and other affiliated funds have established uncommitted borrowing arrangements with certain banks. Borrowings may be made for temporary financing needs. Interest is charged to each fund, based on its borrowings, generally at a rate equal to the Federal Reserve funds rate plus 0.35%. In addition, a commitment fee, based on the average daily, unused portion of the committed line of credit, is allocated among the participating funds at the end of each calendar quarter. For the year ended August 31, 2006, the fund's commitment fee and interest expense were $16,546 and $14,812, respectively, and are included in miscellaneous expense on the Statement of Operations. REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM To the Trustees of MFS Series Trust I and Shareholders of MFS Research International Fund: We have audited the accompanying statement of assets and liabilities of MFS Research International Fund (the Fund) (one of the portfolios comprising MFS Series Trust I), including the portfolio of investments, as of August 31, 2006, and the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended, and the financial highlights for each of the periods indicated therein. These financial statements and financial highlights are the responsibility of the Fund's management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. We were not engaged to perform an audit of the Fund's internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Fund's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements and financial highlights, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of August 31, 2006, by correspondence with the Fund's custodian and brokers or by other appropriate auditing procedures where replies from brokers were not received. We believe that our audits provide a reasonable basis for our opinion. In our opinion, the financial statements and financial highlights referred to above present fairly, in all material respects, the financial position of MFS Research International Fund at August 31, 2006, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended, and its financial highlights for each of the periods indicated therein, in conformity with U.S. generally accepted accounting principles. ERNST & YOUNG LLP Boston, Massachusetts October 20, 2006 TRUSTEES AND OFFICERS -- IDENTIFICATION AND BACKGROUND The Trustees and officers of the Trust, as of October 1, 2006, are listed below, together with their principal occupations during the past five years. (Their titles may have varied during that period.) The address of each Trustee and officer is 500 Boylston Street, Boston, Massachusetts 02116. PRINCIPAL OCCUPATIONS DURING POSITION(s) HELD TRUSTEE/OFFICER THE PAST FIVE YEARS & NAME, DATE OF BIRTH WITH FUND SINCE(h) OTHER DIRECTORSHIPS(j) - ------------------- ---------------- --------------- ---------------------------------- INTERESTED TRUSTEES Robert J. Manning(k) Trustee February 2004 Massachusetts Financial Services (born 10/20/63) Company, Chief Executive Officer, President, Chief Investment Officer and Director Robert C. Pozen(k) Trustee February 2004 Massachusetts Financial Services (born 8/08/46) Company, Chairman (since February 2004); Secretary of Economic Affairs, The Commonwealth of Massachusetts (January 2002 to December 2002); Fidelity Investments, Vice Chairman (June 2000 to December 2001); Fidelity Management & Research Company (investment adviser), President (March 1997 to July 2001); Bell Canada Enterprises (telecommunications), Director; Medtronic, Inc. (medical technology), Director; Telesat (satellite communications), Director INDEPENDENT TRUSTEES J. Atwood Ives Trustee and Chair February 1992 Private investor; Eastern (born 5/01/36) of Trustees Enterprises (diversified services company), Chairman, Trustee and Chief Executive Officer (until November 2000) Robert E. Butler(n) Trustee January 2006 Consultant - regulatory and (born 11/29/41) compliance matters (since July 2002); PricewaterhouseCoopers LLP (professional services firm), Partner (November 2000 until June 2002) Lawrence H. Cohn, M.D. Trustee August 1993 Brigham and Women's Hospital, (born 3/11/37) Senior Cardiac Surgeon, Chief of Cardiac Surgery (until 2005); Harvard Medical School, Professor of Surgery; Brigham and Women's Hospital Physicians' Organization, Chair (2000 to 2004) David H. Gunning Trustee January 2004 Cleveland-Cliffs Inc. (mining (born 5/30/42) products and service provider), Vice Chairman/Director (since April 2001); Encinitos Ventures (private investment company), Principal (1997 to April 2001); Lincoln Electric Holdings, Inc. (welding equipment manufacturer), Director William R. Gutow Trustee December 1993 Private investor and real estate (born 9/27/41) consultant; Capitol Entertainment Management Company (video franchise), Vice Chairman Michael Hegarty Trustee December 2004 Retired; AXA Financial (financial (born 12/21/44) services and insurance), Vice Chairman and Chief Operating Officer (until May 2001); The Equitable Life Assurance Society (insurance), President and Chief Operating Officer (until May 2001) Lawrence T. Perera Trustee July 1981 Hemenway & Barnes (attorneys), (born 6/23/35) Partner J. Dale Sherratt Trustee August 1993 Insight Resources, Inc. (born 9/23/38) (acquisition planning specialists), President; Wellfleet Investments (investor in health care companies), Managing General Partner (since 1993); Cambridge Nutraceuticals (professional nutritional products), Chief Executive Officer (until May 2001) Laurie J. Thomsen Trustee March 2005 Private investor; Prism Venture (born 8/05/57) Partners (venture capital), Co- founder and General Partner (until June 2004); St. Paul Travelers Companies (commercial property liability insurance), Director Robert W. Uek Trustee January 2006 Retired (since 1999); (born 5/18/41) PricewaterhouseCoopers LLP (professional services firm), Partner (until 1999); Consultant to investment company industry (since 2000); TT International Funds (mutual fund complex), Trustee (2000 until 2005); Hillview Investment Trust II Funds (mutual fund complex), Trustee (2000 until 2005) OFFICERS Maria F. Dwyer(k) President November 2005 Massachusetts Financial Services (born 12/01/58) Company, Executive Vice President and Chief Regulatory Officer (since March 2004); Fidelity Management & Research Company, Vice President (prior to March 2004); Fidelity Group of Funds, President and Treasurer (prior to March 2004) Tracy Atkinson(k) Treasurer September 2005 Massachusetts Financial Services (born 12/30/64) Company, Senior Vice President (since September 2004); PricewaterhouseCoopers LLP, Partner (prior to September 2004) Christopher R. Bohane(k) Assistant Secretary July 2005 Massachusetts Financial Services (born 1/18/74) and Assistant Clerk Company, Vice President and Senior Counsel (since April 2003); Kirkpatrick & Lockhart LLP (law firm), Associate (prior to April 2003) Ethan D. Corey(k) Assistant Secretary July 2005 Massachusetts Financial Services (born 11/21/63) and Assistant Clerk Company, Special Counsel (since December 2004); Dechert LLP (law firm), Counsel (prior to December 2004) David L. DiLorenzo(k) Assistant Treasurer July 2005 Massachusetts Financial Services (born 8/10/68) Company, Vice President (since June 2005); JP Morgan Investor Services, Vice President (prior to June 2005) Timothy M. Fagan(k) Assistant Secretary September 2005 Massachusetts Financial Services (born 7/10/68) and Assistant Clerk Company, Vice President and Senior Counsel (since September 2005); John Hancock Advisers, LLC, Vice President and Chief Compliance Officer (September 2004 to August 2005), Senior Attorney (prior to September 2004); John Hancock Group of Funds, Vice President and Chief Compliance Officer (September 2004 to December 2004) Mark D. Fischer(k) Assistant Treasurer July 2005 Massachusetts Financial Services (born 10/27/70) Company, Vice President (since May 2005); JP Morgan Investment Management Company, Vice President (prior to May 2005) Brian E. Langenfeld(k) Assistant Secretary June 2006 Massachusetts Financial Services (born 3/07/73) and Assistant Clerk Company, Assistant Vice President and Counsel (since May 2006); John Hancock Advisers, LLC, Assistant Vice President and Counsel (May 2005 to April 2006); John Hancock Advisers, LLC, Attorney and Assistant Secretary (prior to May 2005) Ellen Moynihan(k) Assistant Treasurer April 1997 Massachusetts Financial Services (born 11/13/57) Company, Senior Vice President Susan S. Newton(k) Assistant Secretary May 2005 Massachusetts Financial Services (born 3/07/50) and Assistant Clerk Company, Senior Vice President and Associate General Counsel (since April 2005); John Hancock Advisers, LLC, Senior Vice President, Secretary and Chief Legal Officer (prior to April 2005); John Hancock Group of Funds, Senior Vice President, Secretary and Chief Legal Officer (prior to April 2005) Susan A. Pereira(k) Assistant Secretary July 2005 Massachusetts Financial Services (born 11/05/70) and Assistant Clerk Company, Vice President and Senior Counsel (since June 2004); Bingham McCutchen LLP (law firm), Associate (prior to June 2004) Mark N. Polebaum(k) Secretary and Clerk January 2006 Massachusetts Financial Services (born 5/01/52) Company, Executive Vice President, General Counsel and Secretary (since January 2006); Wilmer Cutler Pickering Hale and Dorr LLP (law firm), Partner (prior to January 2006) Frank L. Tarantino Independent Chief June 2004 Tarantino LLC (provider of (born 3/07/44) Compliance Officer compliance services), Principal (since June 2004); CRA Business Strategies Group (consulting services), Executive Vice President (April 2003 to June 2004); David L. Babson & Co. (investment adviser), Managing Director, Chief Administrative Officer and Director (prior to March 2003) James O. Yost(k) Assistant Treasurer September 1990 Massachusetts Financial Services (born 6/12/60) Company, Senior Vice President - ------------ (h) Date first appointed to serve as Trustee/officer of an MFS fund. Each Trustee has served continuously since appointment unless indicated otherwise. (j) Directorships or trusteeships of companies required to report to the Securities and Exchange Commission (i.e., "public companies"). (k) "Interested person" of the Trust within the meaning of the Investment Company Act of 1940 (referred to as the 1940 Act), which is the principal federal law governing investment companies like the fund, as a result of position with MFS. The address of MFS is 500 Boylston Street, Boston, Massachusetts 02116. (n) In 2004 and 2005, Mr. Butler provided consulting services to the independent compliance consultant retained by MFS pursuant to its settlement with the SEC concerning market timing and related matters. The terms of that settlement required that compensation and expenses related to the independent compliance consultant be borne exclusively by MFS and, therefore, MFS paid Mr. Butler for the services he rendered to the independent compliance consultant. In 2004 and 2005, MFS paid Mr. Butler a total of $351,119.29. The Trust held a shareholders' meeting in 2005 to elect Trustees, and will hold a shareholders' meeting at least once every five years thereafter, to elect Trustees. Each Trustee (except Mr. Butler and Mr. Uek) has been elected by shareholders and each Trustee and officer holds office until his or her successor is chosen and qualified or until his or her earlier death, resignation, retirement or removal. Messrs. Butler, Sherratt and Uek and Ms. Thomsen are members of the Trust's Audit Committee. Each of the Trust's Trustees and officers holds comparable positions with certain other funds of which MFS or a subsidiary is the investment adviser or distributor, and, in the case of the officers, with certain affiliates of MFS. As of January 1, 2006, the Trustees served as board members of 98 funds within the MFS Family of Funds. The Statement of Additional Information contains further information about the Trustees and is available without charge upon request by calling 1-800-225-2606. - ------------------------------------------------------------------------------------------------------- INVESTMENT ADVISER CUSTODIAN Massachusetts Financial Services Company State Street Bank and Trust Company 500 Boylston Street, Boston, MA 225 Franklin Street, Boston, MA 02110 02116-3741 INDEPENDENT REGISTERED PUBLIC DISTRIBUTOR ACCOUNTING FIRM MFS Fund Distributors, Inc. Ernst & Young LLP 500 Boylston Street, Boston, MA 200 Clarendon Street, Boston, MA 02116 02116-3741 PORTFOLIO MANAGERS Jose Luis Garcia Thomas Melendez BOARD REVIEW OF INVESTMENT ADVISORY AGREEMENT The Investment Company Act of 1940 requires that both the full Board of Trustees and a majority of the non-interested ("independent") Trustees, voting separately, annually approve the continuation of the Fund's investment advisory agreement with MFS. The Trustees consider matters bearing on the Fund and its advisory arrangements at their meetings throughout the year, including a review of performance data at each regular meeting. In addition, the independent Trustees met several times over the course of three months beginning in May and ending in July, 2006 ("contract review meetings") for the specific purpose of considering whether to approve the continuation of the investment advisory agreement for the Fund and the other investment companies that the Board oversees (the "MFS Funds"). The independent Trustees were assisted in their evaluation of the Fund's investment advisory agreement by independent legal counsel, from whom they received separate legal advice and with whom they met separately from MFS during various contract review meetings. The independent Trustees were also assisted in this process by the MFS Funds' Independent Chief Compliance Officer, a full-time senior officer appointed by and reporting to the independent Trustees. In connection with their deliberations regarding the continuation of the investment advisory agreement, the Trustees, including the independent Trustees, considered such information and factors as they believed, in light of the legal advice furnished to them and their own business judgment, to be relevant. The investment advisory agreement for the Fund was considered separately, although the Trustees also took into account the common interests of all MFS Funds in their review. As described below, the Trustees considered the nature, quality, and extent of the various investment advisory, administrative, and shareholder services performed by MFS under the existing investment advisory agreement and other arrangements with the Fund. In connection with their contract review meetings, the Trustees received and relied upon materials which included, among other items: (i) information provided by Lipper Inc. on the investment performance of the Fund for various time periods ended December 31, 2005 and the investment performance of a group of funds with substantially similar investment classifications/objectives (the "Lipper performance universe"), as well as the investment performance of a group of funds identified by objective criteria suggested by MFS ("MFS peer funds"), (ii) information provided by Lipper Inc. on the Fund's advisory fees and other expenses and the advisory fees and other expenses of comparable funds identified by Lipper (the "Lipper expense group"), as well as the advisory fees and other expenses of MFS peer funds, (iii) information provided by MFS on the advisory fees of comparable portfolios of other clients of MFS, including institutional separate accounts and other clients, (iv) information as to whether and to what extent applicable expense waivers, reimbursements or fee "breakpoints" are observed for the Fund, (v) information regarding MFS' financial results and financial condition, including MFS' and certain of its affiliates' estimated profitability from services performed for the Fund and the MFS Funds as a whole, (vi) MFS' views regarding the outlook for the mutual fund industry and the strategic business plans of MFS, (vii) descriptions of various functions performed by MFS for the Funds, such as compliance monitoring and portfolio trading practices, and (viii) information regarding the overall organization of MFS, including information about MFS' senior management and other personnel providing investment advisory, administrative and other services to the Fund and the other MFS Funds. The comparative performance, fee and expense information prepared and provided by Lipper Inc. was not independently verified and the independent Trustees did not independently verify any information provided to them by MFS. The Trustees' conclusion as to the continuation of the investment advisory agreement was based on a comprehensive consideration of all information provided to the Trustees and not the result of any single factor. Some of the factors that figured particularly in the Trustees' deliberations are described below, although individual Trustees may have evaluated the information presented differently from one another, giving different weights to various factors. It is also important to recognize that the fee arrangements for the Fund and other MFS Funds are the result of years of review and discussion between the independent Trustees and MFS, that certain aspects of such arrangements may receive greater scrutiny in some years than others, and that the Trustees' conclusions may be based, in part, on their consideration of these same arrangements during the course of the year and in prior years. Based on information provided by Lipper Inc. and MFS, the Trustees reviewed the Fund's total return investment performance as well as the performance of peer groups of funds over various time periods. The Trustees placed particular emphasis on the total return performance of the Fund's Class A shares in comparison to the performance of funds in its Lipper performance universe over the three-year period ended December 31, 2005, which the Trustees believed was a long enough period to reflect differing market conditions. The Fund's performance was in the 3rd quintile relative to the other funds in the universe for this three-year period (the 1st quintile being the best performers and the 5th quintile being the worst performers). The total return performance of the Fund's Class A shares was in the 2nd quintile for each of the one and five-year periods ended December 31, 2005 relative to the Lipper performance universe. Because of the passage of time, these performance results may differ from the performance results for more recent periods, including those shown elsewhere in this report. In the course of their deliberations, the Trustees took into account information provided by MFS in connection with the contract review meetings, as well as during investment review meetings conducted with portfolio management personnel during the course of the year regarding the Fund's performance. After reviewing these and related factors, the Trustees concluded, within the context of their overall conclusions regarding the investment advisory agreement, that they were satisfied with MFS' responses and efforts relating to investment performance. In assessing the reasonableness of the Fund's advisory fee, the Trustees considered, among other information, the Fund's advisory fee and the total expense ratio of the Fund's Class A shares as a percentage of average net assets and the advisory fee and total expense ratios of peer groups of funds based on information provided by Lipper Inc. and MFS. The Trustees considered that the Fund's advisory fee rate schedule is currently subject to breakpoints that reduce the Fund's advisory fee rate on net assets over $1 billion and $2 billion, and that MFS currently observes an expense limitation for the Fund. The Trustees also considered that, according to the Lipper data, the Fund's effective advisory fee rate (taking into account the expense limitation and initial breakpoint described above) was lower than the Lipper expense group median, and the Fund's total expense ratio was at the Lipper expense group median. The Trustees also considered the advisory fees charged by MFS to institutional accounts. In comparing these fees, the Trustees considered information provided by MFS as to the generally broader scope of services provided by MFS to the Fund in comparison to institutional accounts, the higher demands placed on MFS' investment personnel and trading infrastructure as a result of the daily cash in-flows and out-flows of the Fund, and the impact on MFS and expenses associated with the more extensive regulatory regime to which the Fund is subject in comparison to institutional accounts. The Trustees also considered whether the Fund is likely to benefit from any economies of scale in the management of the Fund in the event of growth in assets of the Fund. They noted the Fund's advisory fee rate schedule described above. The Trustees concluded that the existing breakpoints were sufficient to allow the Fund to benefit from economies of scale as its assets grow. The Trustees also considered information prepared by MFS relating to MFS' costs and profits with respect to the Fund, the MFS Funds considered as a group, and other investment companies and accounts advised by MFS, as well as MFS' methodologies used to determine and allocate its costs to the MFS Funds, the Fund and other accounts and products for purposes of estimating profitability. After reviewing these and other factors described herein, the Trustees concluded, within the context of their overall conclusions regarding the investment advisory agreement, that the advisory fees charged to the Fund represent reasonable compensation in light of the services being provided by MFS to the Fund. In addition, the Trustees considered MFS' resources and related efforts to continue to retain, attract and motivate capable personnel to serve the Fund. The Trustees also considered current and developing conditions in the financial services industry, including the entry into the industry of large and well-capitalized companies which are spending, and appear to be prepared to continue to spend, substantial sums to engage personnel and to provide services to competing investment companies. In this regard, the Trustees also considered the financial resources of MFS and its ultimate parent, Sun Life Financial Inc. The Trustees also considered the advantages and possible disadvantages to the Fund of having an adviser which also serves other investment companies as well as other accounts. The Trustees also considered the nature, quality, cost, and extent of administrative, transfer agency, and distribution services provided to the Fund by MFS and its affiliates under agreements and plans other than the investment advisory agreement, including any 12b-1 fees the Fund pays to MFS Fund Distributors, Inc., an affiliate of MFS. The Trustees also considered the nature, extent and quality of certain other services MFS performs or arranges for on the Fund's behalf, which may include securities lending programs, directed expense payment programs, class action recovery programs, and MFS' interaction with third-party service providers, principally custodians and sub-custodians. The Trustees concluded that the various non- advisory services provided by MFS and its affiliates on behalf of the Funds were satisfactory. The Trustees also considered benefits to MFS from the use of the Fund's portfolio brokerage commissions, if applicable, to pay for investment research and other similar services (excluding third-party research, for which MFS pays directly), and various other factors. Additionally, the Trustees considered so-called "fall-out benefits" to MFS such as reputational value derived from serving as investment manager to the Fund. Based on their evaluation of factors that they deemed to be material, including those factors described above, the Board of Trustees, including a majority of the independent Trustees, concluded that the Fund's investment advisory agreement with MFS should be continued for an additional one-year period, commencing August 1, 2006. A discussion regarding the Board's most recent review and renewal of the Fund's investment advisory agreement will be available on or before November 1, 2006 by clicking on the fund's name under "Select a fund" on the MFS Web site (mfs.com). PROXY VOTING POLICIES AND INFORMATION A general description of the MFS funds' proxy voting policies and procedures is available without charge, upon request, by calling 1-800-225-2606, by visiting the Proxy Voting section of mfs.com or by visiting the SEC's Web site at http://www.sec.gov. Information regarding how the fund voted proxies relating to portfolio securities during the most recent twelve-month period ended June 30 is available without charge by visiting the Proxy Voting section of mfs.com or by visiting the SEC's Web site at http://www.sec.gov. QUARTERLY PORTFOLIO DISCLOSURE The fund will file a complete schedule of portfolio holdings with the Securities and Exchange Commission (the Commission) for the first and third quarters of each fiscal year on Form N-Q. The fund's Form N-Q may be reviewed and copied at the: Public Reference Room Securities and Exchange Commission 100 F Street, NE, Room 1580 Washington, D.C. 20549 Information on the operation of the Public Reference Room may be obtained by calling the Commission at 1-202-551-5850. The fund's Form N-Q is available on the EDGAR database on the Commission's Internet Web site at http://www.sec.gov, and copies of this information may be obtained, upon payment of a duplicating fee, by electronic request at the following e-mail address: publicinfo@sec.gov or by writing the Public Reference Section at the above address. A shareholder can also obtain the quarterly portfolio holdings report at mfs.com. FEDERAL TAX INFORMATION (unaudited) The fund will notify shareholders of amounts for use in preparing 2006 income tax forms in January 2007. The following information is provided pursuant to provisions of the Internal Revenue Code. The fund designates the maximum amount allowable as qualified dividend income eligible for the 15% tax rate. The fund designates $114,817,244 as capital gain dividends paid during the fiscal year. Income derived from foreign sources was $42,123,530. The fund intends to pass through foreign tax credits of $2,339,390 for the fiscal year. MFS(R) PRIVACY NOTICE Privacy is a concern for every investor today. At MFS Investment Management(R) and the MFS funds, we take this concern very seriously. We want you to understand our policies about the investment products and services that we offer, and how we protect the nonpublic personal information of investors who have a direct relationship with us and our wholly owned subsidiaries. Throughout our business relationship, you provide us with personal information. We maintain information and records about you, your investments, and the services you use. Examples of the nonpublic personal information we maintain include o data from investment applications and other forms o share balances and transactional history with us, our affiliates, or others o facts from a consumer reporting agency We do not disclose any nonpublic personal information about our customers or former customers to anyone, except as permitted by law. We may share nonpublic personal information with third parties or certain of our affiliates in connection with servicing your account or processing your transactions. We may share information with companies or financial institutions that perform marketing services on our behalf or with other financial institutions with which we have joint marketing arrangements, subject to any legal requirements. Authorization to access your nonpublic personal information is limited to appropriate personnel who provide products, services, or information to you. We maintain physical, electronic, and procedural safeguards to help protect the personal information we collect about you. If you have any questions about the MFS privacy policy, please call 1-800-225-2606 any business day between 8 a.m. and 8 p.m. Eastern time. Note: If you own MFS products or receive MFS services in the name of a third party such as a bank or broker-dealer, their privacy policy may apply to you instead of ours. CONTACT US WEB SITE MAILING ADDRESS mfs.com MFS Service Center, Inc. P.O. Box 55824 MFS TALK Boston, MA 1-800-637-8255 02205-5824 24 hours a day OVERNIGHT MAIL ACCOUNT SERVICE AND MFS Service Center, Inc. LITERATURE 500 Boylston Street Boston, MA 02116-3741 SHAREHOLDERS 1-800-225-2606 8 a.m. to 8 p.m. ET INVESTMENT PROFESSIONALS 1-800-343-2829 8 a.m. to 8 p.m. ET RETIREMENT PLAN SERVICES 1-800-637-1255 8 a.m. to 8 p.m. ET - ------------------------------------------------------------------------------- Go paperless with eDELIVERY: Arrange to have MFS send prospectuses, reports, and proxies directly to your e-mail inbox. You'll get timely information and less clutter in your mailbox (not to mention help your fund save printing and postage costs). SIGN UP: If your account is registered with us, simply go to mfs.com, log in to your account via MFS Access, and select the eDelivery sign up options. If you own your MFS fund shares through a financial institution or a retirement plan, MFS TALK, MFS Access, and eDelivery may not be available to you. - ------------------------------------------------------------------------------- M F S(R) INVESTMENT MANAGEMENT ITEM 2. CODE OF ETHICS. The Registrant has adopted a Code of Ethics pursuant to Section 406 of the Sarbanes-Oxley Act and as defined in Form N-CSR that applies to the Registrant's principal executive officer and principal financial and accounting officer. The Registrant has not amended any provision in its Code of Ethics (the "Code") that relates to an element of the Code's definitions enumerated in paragraph (b) of Item 2 of this Form N-CSR. ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT. Messrs. Robert E. Butler and Robert W. Uek and Ms. Laurie J. Thomsen, members of the Audit Committee, have been determined by the Board of Trustees in their reasonable business judgment to meet the definition of "audit committee financial expert" as such term is defined in Form N-CSR. In addition, Messrs. Butler, and Uek and Ms. Thomsen are "independent" members of the Audit Committee (as such term has been defined by the Securities and Exchange Commission in regulations implementing Section 407 of the Sarbanes-Oxley Act of 2002). The Securities and Exchange Commission has stated that the designation of a person as an audit committee financial expert pursuant to this Item 3 on the Form N-CSR does not impose on such a person any duties, obligations or liability that are greater than the duties, obligations or liability imposed on such person as a member of the Audit Committee and the Board of Trustees in the absence of such designation or identification. ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. ITEMS 4(a) THROUGH 4(d) AND 4(g): The Board of Trustees has appointed Deloitte & Touche LLP ("Deloitte") to serve as independent accountants to certain series of the Registrant and Ernst & Young LLP ("E&Y") to serve in the same capacity to certain other series of the Registrant (the series referred to collectively as the "Funds" and singularly as a "Fund"). The tables below set forth the audit fees billed to the Funds as well as fees for non-audit services provided to the Funds and/or to the Funds' investment adviser, Massachusetts Financial Services Company ("MFS") and to various entities either controlling, controlled by, or under common control with MFS that provide ongoing services to the Funds ("MFS Related Entities"). For the fiscal years ended August 31, 2006 and 2005, audit fees billed to the Funds by Deloitte and E&Y were as follows: Audit Fees FEES BILLED BY DELOITTE: 2006 2005 ---- ---- MFS Cash Reserve Fund $25,360 $23,660 Audit Fees FEES BILLED BY E&Y: 2006 2005 ---- ---- MFS Core Equity Fund $35,580 $33,580 MFS Core Growth Fund 35,580 33,580 MFS New Discovery Fund 35,580 33,580 MFS Research International Fund 37,780 35,780 MFS Strategic Growth Fund 35,580 33,580 MFS Technology Fund 35,580 33,580 MFS Value Fund 35,580 33,580 -------- -------- TOTAL $251,260 $237,260 For the fiscal years ended August 31, 2006 and 2005, fees billed by Deloitte and E&Y for audit-related, tax and other services provided to the Funds and for audit-related, tax and other services provided to MFS and MFS Related Entities were as follows: Audit-Related Fees(1) Tax Fees(2) All Other Fees(3) FEES BILLED BY DELOITTE: 2006 2005 2006 2005 2006 2005 ---- ---- ---- ---- ---- ---- To MFS Cash Reserve $0 $0 $5,800 $7,500 $558 $0 Fund To MFS and MFS Related $1,035,850 $1,018,716 $0 $62,000 $454,751 $617,000 Entities of MFS Cash Reserve Fund* AGGREGATE FEES FOR NON-AUDIT SERVICES: 2006 2005 ---- ---- To MFS Cash Reserve Fund, $1,614,849 $1,742,817 MFS and MFS Related Entities# Audit-Related Fees(1) Tax Fees(2) All Other Fees(4) FEES BILLED BY E&Y: 2006 2005 2006 2005 2006 2005 ---- ---- ---- ---- ---- ---- To MFS Core Equity Fund $0 $0 $10,192 $9,080 $144 $1,304 To MFS Core Growth 0 0 10,192 9,080 144 1,679 Fund To MFS New Discovery 0 0 10,192 9,080 144 1,865 Fund To MFS Research 0 0 10,522 9,410 144 2,227 International Fund To MFS Strategic Growth 0 0 10,192 9,080 144 2,203 Fund To MFS Technology Fund 0 0 10,192 9,080 144 1,281 To MFS Value Fund 0 0 10,192 9,080 144 5,476 -- -- ------- ------- ------- -------- TOTAL FEES BILLED BY E&Y $0 $0 $71,674 $63,890 $1,008 $16,035 TO ABOVE FUNDS: To MFS and MFS Related $0 $0 $15,500 $0 $97,480 $607,919 Entities of MFS Core Equity Fund* To MFS and MFS Related 0 0 15,500 0 97,480 607,919 Entities of MFS Core Growth Fund* To MFS and MFS Related 0 0 15,500 0 97,480 607,919 Entities of MFS New Discovery Fund* To MFS and MFS Related 0 0 15,500 0 97,480 607,919 Entities of MFS Research International Fund* To MFS and MFS Related 0 0 15,500 0 97,480 607,919 Entities of MFS Strategic Growth Fund* To MFS and MFS Related 0 0 15,500 0 97,480 607,919 Entities of MFS Technology Fund* To MFS and MFS Related 0 0 15,500 0 97,480 607,919 Entities of MFS Value Fund* AGGREGATE FEES FOR NON-AUDIT SERVICES: 2006 2005 ---- ---- To MFS Core Equity Fund, $189,658 $633,803 MFS and MFS Related Entities# To MFS Core Growth 189,658 634,178 Fund, MFS and MFS Related Entities# To MFS New Discovery 189,658 634,364 Fund, MFS and MFS Related Entities# To MFS Research 189,988 635,056 International Fund, MFS and MFS Related Entities# To MFS Strategic Growth 189,658 634,702 Fund, MFS and MFS Related Entities# To MFS Technology 189,658 633,780 Fund, MFS and MFS Related Entities# To MFS Value Fund, MFS 189,658 637,975 and MFS Related Entities# * This amount reflects the fees billed to MFS and MFS Related Entities for non-audit services relating directly to the operations and financial reporting of the Funds (portions of which services also related to the operations and financial reporting of other funds within the MFS Funds complex). # This amount reflects the aggregate fees billed by E&Y or Deloitte, as the case may be, for non-audit services rendered to the Funds and for non-audit services rendered to MFS and the MFS Related Entities. (1) The fees included under "Audit-Related Fees" are fees related to assurance and related services that are reasonably related to the performance of the audit or review of financial statements, but not reported under "Audit Fees," including accounting consultations, agreed-upon procedure reports, attestation reports, comfort letters and internal control reviews. (2) The fees included under "Tax Fees" are fees associated with tax compliance, tax advice and tax planning, including services relating to the filing or amendment of federal, state or local income tax returns, regulated investment company qualification reviews and tax distribution and analysis. (3) The fees included under "All Other Fees" are fees for products and services provided by Deloitte other than those reported under "Audit Fees," "Audit-Related Fees" and "Tax Fees," including fees for services related to sales tax refunds, consultation on internal cost allocations, consultation on allocation of monies pursuant to an administrative proceeding regarding disclosure of brokerage allocation practices in connection with fund sales, analysis of certain portfolio holdings versus investment styles, review of internal controls and review of Rule 38a-1 compliance program. (4) The fees included under "All Other Fees" are fees for products and services provided by E&Y other than those reported under "Audit Fees," "Audit-Related Fees" and "Tax Fees," including fees for the subscription to tax treatise and for services related to analysis of fund administrative expenses, compliance program and records management projects. ITEM 4(e)(1): Set forth below are the policies and procedures established by the Audit Committee of the Board of Trustees relating to the pre-approval of audit and non-audit related services: To the extent required by applicable law, pre-approval by the Audit Committee of the Board is needed for all audit and permissible non-audit services rendered to the Funds and all permissible non-audit services rendered to MFS or MFS Related Entities if the services relate directly to the operations and financial reporting of the Registrant. Pre-approval is currently on an engagement-by-engagement basis. In the event pre-approval of such services is necessary between regular meetings of the Audit Committee and it is not practical to wait to seek pre-approval at the next regular meeting of the Audit Committee, pre-approval of such services may be referred to the Chair of the Audit Committee for approval; provided that the Chair may not pre-approve any individual engagement for such services exceeding $50,000 or multiple engagements for such services in the aggregate exceeding $100,000 in each period between regular meetings of the Audit Committee. Any engagement pre-approved by the Chair between regular meetings of the Audit Committee shall be presented for ratification by the entire Audit Committee at its next regularly scheduled meeting. ITEM 4(e)(2): None, or 0%, of the services relating to the Audit-Related Fees, Tax Fees and All Other Fees paid by the Fund and MFS and MFS Related Entities relating directly to the operations and financial reporting of the Registrant disclosed above were approved by the audit committee pursuant to paragraphs (c)(7)(i)(C) of Rule 2-01 of Regulation S-X (which permits audit committee approval after the start of the engagement with respect to services other than audit, review or attest services, if certain conditions are satisfied). ITEM 4(f): Not applicable. ITEM 4(h): The Registrant's Audit Committee has considered whether the provision by a Registrant's independent registered public accounting firm of non-audit services to MFS and MFS Related Entities that were not pre-approved by the Committee (because such services did not relate directly to the operations and financial reporting of the Registrant) was compatible with maintaining the independence of the independent registered public accounting firm as the Registrant's principal auditors. ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS. Not applicable to the Registrant. ITEM 6. SCHEDULE OF INVESTMENTS. A schedule of investments of the Registrant is included as part of the report to shareholders of such series under Item 1 of this Form N-CSR. ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES. Not applicable to the Registrant. ITEM 8. PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES. Not applicable to the Registrant. ITEM 9. PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT COMPANY AND AFFILIATED PURCHASERS. Not applicable to the Registrant. ITEM 10. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS. There were no material changes to the procedures by which shareholders may send recommendations to the Board for nominees to the Registrant's Board since the Registrant last provided disclosure as to such procedures in response to the requirements of Item 7(d)(2)(ii)(G) of Schedule 14A or this Item. ITEM 11. CONTROLS AND PROCEDURES. (a) Based upon their evaluation of the effectiveness of the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940 (the "Act")) as conducted within 90 days of the filing date of this Form N-CSR, the registrant's principal financial officer and principal executive officer have concluded that those disclosure controls and procedures provide reasonable assurance that the material information required to be disclosed by the registrant on this report is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission's rules and forms. (b) There were no changes in the registrant's internal controls over financial reporting (as defined in Rule 30a-3(d) under the Act) that occurred during the second fiscal quarter of the period covered by the report that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting. ITEM 12. EXHIBITS. (a) File the exhibits listed below as part of this Form. Letter or number the exhibits in the sequence indicated. (1) Any code of ethics, or amendment thereto, that is the subject of the disclosure required by Item 2, to the extent that the registrant intends to satisfy the Item 2 requirements through filing of an exhibit: Code of Ethics attached hereto. (2) A separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2 under the Act (17 CFR 270.30a-2): Attached hereto. (b) If the report is filed under Section 13(a) or 15(d) of the Exchange Act, provide the certifications required by Rule 30a-2(b) under the Act (17 CFR 270.30a-2(b)), Rule 13a-14(b) or Rule 15d-14(b) under the Exchange Act (17 CFR 240.13a-14(b) or 240.15d-14(b)) and Section 1350 of Chapter 63 of Title 18 of the United States Code (18 U.S.C. 1350) as an exhibit. A certification furnished pursuant to this paragraph will not be deemed "filed" for the purposes of Section 18 of the Exchange Act (15 U.S.C. 78r), or otherwise subject to the liability of that section. Such certification will not be deemed to be incorporated by reference into any filing under the Securities Act of 1933 or the Exchange Act, except to the extent that the registrant specifically incorporates it by reference: Attached hereto. NOTICE A copy of the Amended and Restated Declaration of Trust of the Registrant is on file with the Secretary of State of the Commonwealth of Massachusetts and notice is hereby given that this instrument is executed on behalf of the Registrant by an officer of the Registrant as an officer and not individually and the obligations of or arising out of this instrument are not binding upon any of the Trustees or shareholders individually, but are binding only upon the assets and property of the respective constituent series of the Registrant. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. (Registrant) MFS SERIES TRUST I ------------------------------------------------------------------ By (Signature and Title)* MARIA F. DWYER ----------------------------------------------------- Maria F. Dwyer, President Date: October 19, 2006 ---------------- Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. By (Signature and Title)* MARIA F. DWYER ----------------------------------------------------- Maria F. Dwyer, President (Principal Executive Officer) Date: October 19, 2006 ---------------- By (Signature and Title)* TRACY ATKINSON ----------------------------------------------------- Tracy Atkinson, Treasurer (Principal Financial Officer and Accounting Officer) Date: October 19, 2006 ---------------- * Print name and title of each signing officer under his or her signature.