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 811-5360 -------- Oppenheimer Main Street Funds, Inc. ----------------------------------- (Exact name of registrant as specified in charter) 6803 South Tucson Way, Centennial, Colorado 80112-3924 ------------------------------------------------------ (Address of principal executive offices) (Zip code) Robert G. Zack, Esq. OppenheimerFunds, Inc. Two World Financial Center, New York, New York 10281-1008 --------------------------------------------------------- (Name and address of agent for service) Registrant's telephone number, including area code: (303) 768-3200 -------------- Date of fiscal year end: August 31 --------- Date of reporting period: 02/29/2008 ---------- ITEM 1. REPORTS TO STOCKHOLDERS. FEBRUARY 29, 2008 - -------------------------------------------------------------------------------- Oppenheimer Management Main Street Fund R Commentaries and Semiannual Report - -------------------------------------------------------------------------------- MANAGEMENT COMMENTARIES An Interview with Your Fund's Managers Listing of Top Holdings SEMIANNUAL REPORT Listing of Investments Financial Statements [OPPENHEIMERFUNDS LOGO] TOP HOLDINGS AND ALLOCATIONS - -------------------------------------------------------------------------------- TOP TEN COMMON STOCK INDUSTRIES - -------------------------------------------------------------------------------- Oil, Gas & Consumable Fuels 13.3% - -------------------------------------------------------------------------------- Computers & Peripherals 8.0 - -------------------------------------------------------------------------------- Diversified Financial Services 6.1 - -------------------------------------------------------------------------------- Insurance 6.0 - -------------------------------------------------------------------------------- Software 5.3 - -------------------------------------------------------------------------------- Industrial Conglomerates 4.8 - -------------------------------------------------------------------------------- Communications Equipment 4.7 - -------------------------------------------------------------------------------- Semiconductors & Semiconductor Equipment 4.7 - -------------------------------------------------------------------------------- Health Care Providers & Services 4.2 - -------------------------------------------------------------------------------- Media 4.2 Portfolio holdings and allocations are subject to change. Percentages are as of February 29, 2008, and are based on net assets. TOP TEN COMMON STOCK HOLDINGS - -------------------------------------------------------------------------------- Exxon Mobil Corp. 5.2% - -------------------------------------------------------------------------------- General Electric Co. 3.3 - -------------------------------------------------------------------------------- Microsoft Corp. 3.2 - -------------------------------------------------------------------------------- Hewlett-Packard Co. 2.9 - -------------------------------------------------------------------------------- International Business Machines Corp. 2.3 - -------------------------------------------------------------------------------- QUALCOMM, Inc. 2.3 - -------------------------------------------------------------------------------- Bank of America Corp. 2.3 - -------------------------------------------------------------------------------- JPMorgan Chase & Co. 2.3 - -------------------------------------------------------------------------------- Chevron Corp. 2.3 - -------------------------------------------------------------------------------- American International Group, Inc. 2.0 Portfolio holdings and allocations are subject to change. Percentages are as of February 29, 2008, and are based on net assets. For up-to-date Top 10 Fund holdings, please visit www.oppenheimerfunds.com. 9 | OPPENHEIMER MAIN STREET FUND TOP HOLDINGS AND ALLOCATIONS - -------------------------------------------------------------------------------- SECTOR ALLOCATION [PIE CHART] Information Technology 27.0% Computers & Peripherals 8.0 Software 5.3 Communications Equipment 4.7 Semiconductors & Semiconductor Equipment 4.7 Internet Software & Services 1.9 IT Services 1.6 Electronic Equipment & Instruments 0.5 Office Electronics 0.3 Financials 19.0 Energy 16.2 Industrials 10.7 Health Care 9.0 Consumer Discretionary 6.7 Consumer Staples 4.5 Materials 4.2 Telecommunication Services 2.6 Utilities 0.1 Portfolio holdings and allocations are subject to change. Percentages are as of February 29, 2008, and are based on the total market value of common stocks. 10 | OPPENHEIMER MAIN STREET FUND NOTES - -------------------------------------------------------------------------------- Total returns include changes in share price and reinvestment of dividends and capital gains distributions in a hypothetical investment for the periods shown. Cumulative total returns are not annualized. The Fund's total returns shown do not reflect the deduction of income taxes on an individual's investment. Taxes may reduce your actual investment returns on income or gains paid by the Fund or any gains you may realize if you sell your shares. INVESTORS SHOULD CONSIDER THE FUND'S INVESTMENT OBJECTIVES, RISKS, AND OTHER CHARGES AND EXPENSES CAREFULLY BEFORE INVESTING. THE FUND'S PROSPECTUS CONTAINS THIS AND OTHER INFORMATION ABOUT THE FUND, AND MAY BE OBTAINED BY ASKING YOUR FINANCIAL ADVISOR, CALLING US AT 1.800.525.7048 OR VISITING OUR WEBSITE AT WWW.OPPENHEIMERFUNDS.COM. READ THE PROSPECTUS CAREFULLY BEFORE INVESTING. The Fund's investment strategy and focus can change over time. The mention of specific fund holdings does not constitute a recommendation by OppenheimerFunds, Inc. CLASS A shares of the Fund were first publicly offered on 2/3/88. Class A returns include the current maximum initial sales charge of 5.75%. CLASS B shares of the Fund were first publicly offered on 10/3/94. Class B returns include the applicable contingent deferred sales charge of 5% (1-year) and 2% (5-year). Because Class B shares convert to Class A shares 72 months after purchase, the 10-year return for Class B uses Class A performance for the period after conversion. Class B shares are subject to an annual 0.75% asset-based sales charge. CLASS C shares of the Fund were first publicly offered on 12/1/93. Class C returns include the contingent deferred sales charge of 1% for the 1-year period. Class C shares are subject to an annual 0.75% asset-based sales charge. CLASS N shares of the Fund were first publicly offered on 3/1/01. Class N shares are offered only through retirement plans. Unless otherwise noted, Class N returns include the contingent deferred sales charge of 1% for the 1-year period. Class N shares are subject to an annual 0.25% asset-based sales charge. CLASS Y shares of the Fund were first publicly offered on 11/1/96. Class Y shares are offered only to certain institutional investors under special agreements with the Distributor. An explanation of the calculation of performance is in the Fund's Statement of Additional Information. 11 | OPPENHEIMER MAIN STREET FUND FUND EXPENSES - -------------------------------------------------------------------------------- FUND EXPENSES. As a shareholder of the Fund, you incur two types of costs: (1) transaction costs, which may include sales charges (loads) on purchase payments, contingent deferred sales charges on redemptions; and redemption fees (if applicable); and (2) ongoing costs, including management fees; distribution and service fees; and other Fund expenses. These examples are 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 examples are based on an investment of $1,000.00 invested at the beginning of the period and held for the entire 6-month period ended February 29, 2008. ACTUAL EXPENSES. The first section of the table provides information about actual account values and actual expenses. You may use the information in this section for the class of shares you hold, together with the amount you invested, to estimate the expense that you paid over the period. Simply divide your account value by $1,000.00 (for example, an $8,600.00 account value divided by $1,000.00 = 8.60), then multiply the result by the number in the first section 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 section of the table provides information about hypothetical account values and hypothetical expenses based on the Fund's actual expense ratio for each class of shares, and an assumed rate of return of 5% per year for each class before expenses, which is not the 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 for the class of shares you hold 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 front-end or contingent deferred sales charges (loads), or a $12.00 fee imposed annually on accounts valued at less than $500.00 (subject to exceptions described in 12 | OPPENHEIMER MAIN STREET FUND the Statement of Additional Information). Therefore, the "hypothetical" section of 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. BEGINNING ENDING EXPENSES ACCOUNT ACCOUNT PAID DURING VALUE VALUE 6 MONTHS ENDED ACTUAL SEPTEMBER 1, 2007 FEBRUARY 29, 2008 FEBRUARY 29, 2008 - --------------------------------------------------------------------------------------------------------- Class A $1,000.00 $ 881.00 $4.27 - --------------------------------------------------------------------------------------------------------- Class B 1,000.00 877.90 7.78 - --------------------------------------------------------------------------------------------------------- Class C 1,000.00 877.90 7.74 - --------------------------------------------------------------------------------------------------------- Class N 1,000.00 879.90 5.44 - --------------------------------------------------------------------------------------------------------- Class Y 1,000.00 882.80 2.30 HYPOTHETICAL (5% return before expenses) - --------------------------------------------------------------------------------------------------------- Class A 1,000.00 1,020.34 4.58 - --------------------------------------------------------------------------------------------------------- Class B 1,000.00 1,016.61 8.36 - --------------------------------------------------------------------------------------------------------- Class C 1,000.00 1,016.66 8.31 - --------------------------------------------------------------------------------------------------------- Class N 1,000.00 1,019.10 5.84 - --------------------------------------------------------------------------------------------------------- Class Y 1,000.00 1,022.43 2.47 Expenses are equal to the Fund's annualized expense ratio for that class, multiplied by the average account value over the period, multiplied by 182/366 (to reflect the one-half year period). Those annualized expense ratios, excluding indirect expenses from affiliated fund, based on the 6-month period ended February 29, 2008 are as follows: CLASS EXPENSE RATIOS - -------------------------------------- Class A 0.91% - -------------------------------------- Class B 1.66 - -------------------------------------- Class C 1.65 - -------------------------------------- Class N 1.16 - -------------------------------------- Class Y 0.49 The expense ratios reflect reduction to custodian expenses and voluntary waivers or reimbursements of expenses by the Fund's Manager that can be terminated at any time, without advance notice. The "Financial Highlights" tables in the Fund's financial statements, included in this report, also show the gross expense ratios, without such waivers or reimbursements and reduction to custodian expenses, if applicable. 13 | OPPENHEIMER MAIN STREET FUND STATEMENT OF INVESTMENTS February 29, 2008 / Unaudited - -------------------------------------------------------------------------------- SHARES VALUE - ----------------------------------------------------------------------------------------------------- COMMON STOCKS--99.4% - ----------------------------------------------------------------------------------------------------- CONSUMER DISCRETIONARY--6.6% - ----------------------------------------------------------------------------------------------------- AUTO COMPONENTS--0.1% American Axle & Manufacturing Holdings, Inc. 29,400 $ 578,592 - ----------------------------------------------------------------------------------------------------- ArvinMeritor, Inc. 1 81,600 921,264 - ----------------------------------------------------------------------------------------------------- Autoliv, Inc. 16,100 803,390 - ----------------------------------------------------------------------------------------------------- Gentex Corp. 44,800 722,176 - ----------------------------------------------------------------------------------------------------- Lear Corp. 2 114,100 3,146,878 -------------- 6,172,300 - ----------------------------------------------------------------------------------------------------- AUTOMOBILES--0.0% Thor Industries, Inc. 30,900 941,832 - ----------------------------------------------------------------------------------------------------- DIVERSIFIED CONSUMER SERVICES--0.0% DeVry, Inc. 29,800 1,309,412 - ----------------------------------------------------------------------------------------------------- HOTELS, RESTAURANTS & LEISURE--0.2% Chipotle Mexican Grill, Inc., Cl. B 1,2 43,733 3,757,539 - ----------------------------------------------------------------------------------------------------- Wyndham Worldwide Corp. 67,500 1,496,475 - ----------------------------------------------------------------------------------------------------- Yum! Brands, Inc. 529,100 18,227,495 -------------- 23,481,509 - ----------------------------------------------------------------------------------------------------- HOUSEHOLD DURABLES--0.2% American Greetings Corp., Cl. A 48,800 918,416 - ----------------------------------------------------------------------------------------------------- Black & Decker Corp. 1 200 13,754 - ----------------------------------------------------------------------------------------------------- KB Home 50,100 1,198,893 - ----------------------------------------------------------------------------------------------------- Lennar Corp., Cl. A 1 210,700 3,921,127 - ----------------------------------------------------------------------------------------------------- Mohawk Industries, Inc. 2 20,500 1,463,905 - ----------------------------------------------------------------------------------------------------- NVR, Inc. 1,2 8,000 4,325,440 - ----------------------------------------------------------------------------------------------------- Pulte Homes, Inc. 352,400 4,771,496 - ----------------------------------------------------------------------------------------------------- Ryland Group, Inc. (The) 1 33,000 933,570 - ----------------------------------------------------------------------------------------------------- Tempur-Pedic International, Inc. 1 116,700 2,032,914 - ----------------------------------------------------------------------------------------------------- Toll Brothers, Inc. 2 180,100 3,819,921 -------------- 23,399,436 SHARES VALUE - ----------------------------------------------------------------------------------------------------- INTERNET & CATALOG RETAIL--0.2% Amazon.com, Inc. 2 291,400 $ 18,786,558 - ----------------------------------------------------------------------------------------------------- Expedia, Inc. 2 88,000 2,017,840 -------------- 20,804,398 - ----------------------------------------------------------------------------------------------------- LEISURE EQUIPMENT & PRODUCTS--0.0% Polaris Industries, Inc. 1 22,900 874,322 - ----------------------------------------------------------------------------------------------------- MEDIA--4.2% CBS Corp., Cl. B 66,300 1,512,966 - ----------------------------------------------------------------------------------------------------- Clear Channel Communications, Inc. 1,724,500 55,184,000 - ----------------------------------------------------------------------------------------------------- Comcast Corp., Cl. A 2 551,000 10,766,540 - ----------------------------------------------------------------------------------------------------- Dish Network Corp., Cl. A 2 447,620 13,271,933 - ----------------------------------------------------------------------------------------------------- Gannett Co., Inc. 62,900 1,896,435 - ----------------------------------------------------------------------------------------------------- Getty Images, Inc. 2 39,100 1,257,456 - ----------------------------------------------------------------------------------------------------- Liberty Global, Inc., Series A 2 380,630 14,311,688 - ----------------------------------------------------------------------------------------------------- News Corp., Inc., Cl. A 361,000 6,646,010 - ----------------------------------------------------------------------------------------------------- Scholastic Corp. 2 26,900 938,003 - ----------------------------------------------------------------------------------------------------- Time Warner, Inc. 8,833,940 137,897,803 - ----------------------------------------------------------------------------------------------------- Viacom, Inc., Cl. B 2 1,476,838 58,704,311 - ----------------------------------------------------------------------------------------------------- Walt Disney Co. (The) 2,738,400 88,751,544 -------------- 391,138,689 - ----------------------------------------------------------------------------------------------------- MULTILINE RETAIL--0.4% Big Lots, Inc. 1,2 135,800 2,288,230 - ----------------------------------------------------------------------------------------------------- Dollar Tree Stores, Inc. 2 139,600 3,745,468 - ----------------------------------------------------------------------------------------------------- Family Dollar Stores, Inc. 191,800 3,672,970 - ----------------------------------------------------------------------------------------------------- Macy's, Inc. 265,500 6,552,540 - ----------------------------------------------------------------------------------------------------- Sears Holdings Corp. 1,2 217,600 20,806,912 -------------- 37,066,120 - ----------------------------------------------------------------------------------------------------- SPECIALTY RETAIL--1.2% AutoNation, Inc. 2 237,500 3,460,375 - ----------------------------------------------------------------------------------------------------- AutoZone, Inc. 1,2 40,700 4,683,756 - ----------------------------------------------------------------------------------------------------- Best Buy Co., Inc. 623,200 26,803,832 - ----------------------------------------------------------------------------------------------------- Buckle, Inc. (The) 16,800 762,720 - ----------------------------------------------------------------------------------------------------- Gap, Inc. (The) 1,956,910 39,470,875 - ----------------------------------------------------------------------------------------------------- Home Depot, Inc. 1,110,800 29,491,740 14 | OPPENHEIMER MAIN STREET FUND SHARES VALUE - ----------------------------------------------------------------------------------------------------- SPECIALTY RETAIL Continued Men's Wearhouse, Inc. (The) 40,100 $ 923,904 - ----------------------------------------------------------------------------------------------------- Office Depot, Inc. 2 106,300 1,208,631 - ----------------------------------------------------------------------------------------------------- RadioShack Corp. 1 207,200 3,615,640 -------------- 110,421,473 - ----------------------------------------------------------------------------------------------------- TEXTILES, APPAREL & LUXURY GOODS--0.1% Deckers Outdoor Corp. 2 6,300 697,032 - ----------------------------------------------------------------------------------------------------- Fossil, Inc. 1,2 62,400 2,008,032 - ----------------------------------------------------------------------------------------------------- Iconix Brand Group, Inc.2 43,200 897,696 - ----------------------------------------------------------------------------------------------------- Liz Claiborne, Inc. 1 58,600 1,041,908 - ----------------------------------------------------------------------------------------------------- Polo Ralph Lauren Corp., Cl. A 1 54,900 3,414,231 - ----------------------------------------------------------------------------------------------------- Warnaco Group, Inc. (The) 2 26,800 1,006,608 -------------- 9,065,507 - ----------------------------------------------------------------------------------------------------- CONSUMER STAPLES--4.4% - ----------------------------------------------------------------------------------------------------- BEVERAGES--1.3% Anheuser-Busch Cos., Inc. 201,700 9,498,053 - ----------------------------------------------------------------------------------------------------- Central European Distribution Corp. 2 17,000 989,060 - ----------------------------------------------------------------------------------------------------- Coca-Cola Co. (The) 1,129,600 66,036,416 - ----------------------------------------------------------------------------------------------------- Constellation Brands, Inc., Cl. A 2 74,600 1,433,066 - ----------------------------------------------------------------------------------------------------- PepsiCo, Inc. 546,790 38,034,712 -------------- 115,991,307 - ----------------------------------------------------------------------------------------------------- FOOD & STAPLES RETAILING -- 0.8% Casey's General Stores, Inc. 29,300 733,965 - ----------------------------------------------------------------------------------------------------- CVS Caremark Corp. 614,400 24,809,472 - ----------------------------------------------------------------------------------------------------- Kroger Co. (The) 1,377,610 33,407,043 - ----------------------------------------------------------------------------------------------------- Wal-Mart Stores, Inc. 291,900 14,475,321 -------------- 73,425,801 SHARES VALUE - ----------------------------------------------------------------------------------------------------- FOOD PRODUCTS--0.0% Chiquita Brands International, Inc. 1,2 40,500 $ 829,035 - ----------------------------------------------------------------------------------------------------- Darling International, Inc. 2 72,000 1,000,800 - ----------------------------------------------------------------------------------------------------- Fresh Del Monte Produce, Inc. 2 25,900 860,139 -------------- 2,689,974 - ----------------------------------------------------------------------------------------------------- HOUSEHOLD PRODUCTS--1.4% Procter & Gamble Co. (The) 2,030,285 134,364,261 - ----------------------------------------------------------------------------------------------------- PERSONAL PRODUCTS--0.0% Chattem, Inc. 1,2 12,400 965,960 - ----------------------------------------------------------------------------------------------------- Herbalife Ltd. 6,300 263,529 -------------- 1,229,489 - ----------------------------------------------------------------------------------------------------- TOBACCO--0.9% Altria Group, Inc. 1,186,300 86,765,982 - ----------------------------------------------------------------------------------------------------- Universal Corp. 17,200 978,852 -------------- 87,744,834 - ----------------------------------------------------------------------------------------------------- ENERGY--16.1% ENERGY EQUIPMENT & SERVICES--2.8% Baker Hughes, Inc. 113,900 7,664,331 - ----------------------------------------------------------------------------------------------------- Diamond Offshore Drilling, Inc. 199,200 24,069,336 - ----------------------------------------------------------------------------------------------------- Dresser-Rand Group, Inc. 2 45,000 1,533,150 - ----------------------------------------------------------------------------------------------------- Dril-Quip, Inc. 2 19,200 898,176 - ----------------------------------------------------------------------------------------------------- ENSCO International, Inc. 48,500 2,902,240 - ----------------------------------------------------------------------------------------------------- FMC Technologies, Inc. 2 35,700 2,022,762 - ----------------------------------------------------------------------------------------------------- Global Industries Ltd. 2 57,700 1,062,257 - ----------------------------------------------------------------------------------------------------- Halliburton Co. 1,194,600 45,753,180 - ----------------------------------------------------------------------------------------------------- NATCO Group, Inc., Cl. A 2 19,600 933,940 - ----------------------------------------------------------------------------------------------------- Patterson-UTI Energy, Inc. 88,600 2,102,478 - ----------------------------------------------------------------------------------------------------- Schlumberger Ltd. 1,661,600 143,645,320 - ----------------------------------------------------------------------------------------------------- Seacor Holdings, Inc. 2 8,100 777,519 - ----------------------------------------------------------------------------------------------------- Tidewater, Inc. 36,600 2,055,090 15 | OPPENHEIMER MAIN STREET FUND STATEMENT OF INVESTMENTS Unaudited / Continued - -------------------------------------------------------------------------------- SHARES VALUE - ------------------------------------------------------------------------------------------------------- ENERGY EQUIPMENT & SERVICES Continued Transocean, Inc. 206,200 $ 28,973,162 ---------------- 264,392,941 - ------------------------------------------------------------------------------------------------------- OIL, GAS & CONSUMABLE FUELS--13.3% Anadarko Petroleum Corp. 665,500 42,418,970 - ------------------------------------------------------------------------------------------------------- Apache Corp. 211,900 24,307,049 - ------------------------------------------------------------------------------------------------------- Chesapeake Energy Corp. 531,400 24,029,908 - ------------------------------------------------------------------------------------------------------- Chevron Corp. 2,442,860 211,698,248 - ------------------------------------------------------------------------------------------------------- ConocoPhillips 1,928,796 159,530,717 - ------------------------------------------------------------------------------------------------------- CONSOL Energy, Inc. 25,600 1,945,088 - ------------------------------------------------------------------------------------------------------- Devon Energy Corp. 241,600 24,817,152 - ------------------------------------------------------------------------------------------------------- EOG Resources, Inc. 230,700 27,450,993 - ------------------------------------------------------------------------------------------------------- Exxon Mobil Corp. 5,660,196 492,493,654 - ------------------------------------------------------------------------------------------------------- Frontier Oil Corp. 41,200 1,471,252 - ------------------------------------------------------------------------------------------------------- Hess Corp. 249,800 23,276,364 - ------------------------------------------------------------------------------------------------------- Marathon Oil Corp. 451,900 24,023,004 - ------------------------------------------------------------------------------------------------------- Mariner Energy, Inc. 2 44,600 1,236,758 - ------------------------------------------------------------------------------------------------------- Murphy Oil Corp. 22,800 1,832,664 - ------------------------------------------------------------------------------------------------------- Noble Energy, Inc. 63,600 4,922,640 - ------------------------------------------------------------------------------------------------------- Occidental Petroleum Corp. 1,308,600 101,246,382 - ------------------------------------------------------------------------------------------------------- Stone Energy Corp. 2 21,300 1,081,188 - ------------------------------------------------------------------------------------------------------- Valero Energy Corp. 1,075,800 62,148,966 - ------------------------------------------------------------------------------------------------------- XTO Energy, Inc. 362,600 22,376,046 ---------------- 1,252,307,043 - ------------------------------------------------------------------------------------------------------- FINANCIALS--18.9% - ------------------------------------------------------------------------------------------------------- CAPITAL MARKETS--3.8% Ameriprise Financial, Inc. 5,400 273,456 - ------------------------------------------------------------------------------------------------------- Apollo Investment Corp. 1 62,500 968,750 - ------------------------------------------------------------------------------------------------------- Charles Schwab Corp. (The) 900,500 17,658,805 - ------------------------------------------------------------------------------------------------------- FCStone Group, Inc. 2 21,900 1,021,416 - ------------------------------------------------------------------------------------------------------- Goldman Sachs Group, Inc. (The) 1,057,700 179,417,651 - ------------------------------------------------------------------------------------------------------- Invesco Ltd. 111,300 2,850,393 SHARES VALUE - ------------------------------------------------------------------------------------------------------- CAPITAL MARKETS Continued Janus Capital Group, Inc. 161,400 $ 3,909,108 - ------------------------------------------------------------------------------------------------------- Knight Capital Group, Inc., Cl. A 2 57,900 928,137 - ------------------------------------------------------------------------------------------------------- Lehman Brothers Holdings, Inc. 593,200 30,247,268 - ------------------------------------------------------------------------------------------------------- Merrill Lynch & Co., Inc. 989,092 49,019,400 - ------------------------------------------------------------------------------------------------------- Morgan Stanley 1,495,938 63,008,909 - ------------------------------------------------------------------------------------------------------- optionsXpress Holdings, Inc. 39,800 921,768 - ------------------------------------------------------------------------------------------------------- State Street Corp. 116,600 9,158,930 ---------------- 359,383,991 - ------------------------------------------------------------------------------------------------------- COMMERCIAL BANKS--2.5% U.S. Bancorp 1,315,270 42,114,945 - ------------------------------------------------------------------------------------------------------- Wachovia Corp. 1 3,618,010 110,783,466 - ------------------------------------------------------------------------------------------------------- Wells Fargo & Co. 1 2,749,720 80,374,316 ---------------- 233,272,727 - ------------------------------------------------------------------------------------------------------- CONSUMER FINANCE--0.4% Capital One Financial Corp. 1 638,100 29,371,743 - ------------------------------------------------------------------------------------------------------- Cash America International, Inc. 27,300 883,428 - ------------------------------------------------------------------------------------------------------- Discover Financial Services 1 114,169 1,722,810 ---------------- 31,977,981 - ------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIAL SERVICES--6.1% Bank of America Corp. 5,486,939 218,050,956 - ------------------------------------------------------------------------------------------------------- Citigroup, Inc. 6,070,346 143,927,904 - ------------------------------------------------------------------------------------------------------- JPMorgan Chase & Co. 5,249,296 213,383,882 - ------------------------------------------------------------------------------------------------------- NASDAQ OMX Group, Inc. (The) 2 52,400 2,175,124 ---------------- 577,537,866 - ------------------------------------------------------------------------------------------------------- INSURANCE--6.0% ACE Ltd. 276,900 15,572,856 - ------------------------------------------------------------------------------------------------------- Allstate Corp. 733,100 34,990,863 - ------------------------------------------------------------------------------------------------------- American International Group, Inc. 3,936,505 184,464,624 16 | OPPENHEIMER MAIN STREET FUND SHARES VALUE - ------------------------------------------------------------------------------------------------------- INSURANCE Continued Aon Corp. 974,400 $ 40,544,784 - ------------------------------------------------------------------------------------------------------- Arch Capital Group Ltd. 2 19,600 1,342,208 - ------------------------------------------------------------------------------------------------------- Aspen Insurance Holdings Ltd. 38,600 1,117,084 - ------------------------------------------------------------------------------------------------------- Assurant, Inc. 58,800 3,677,940 - ------------------------------------------------------------------------------------------------------- Assured Guaranty Ltd. 1 40,500 1,038,825 - ------------------------------------------------------------------------------------------------------- Axis Capital Holdings Ltd. 46,600 1,718,142 - ------------------------------------------------------------------------------------------------------- Berkley (W.R.) Corp. 55,700 1,603,603 - ------------------------------------------------------------------------------------------------------- Berkshire Hathaway, Inc., Cl. B 2 7,300 34,123,850 - ------------------------------------------------------------------------------------------------------- Chubb Corp. 1,257,700 64,016,930 - ------------------------------------------------------------------------------------------------------- CNA Financial Corp. 39,100 1,042,015 - ------------------------------------------------------------------------------------------------------- Delphi Financial Group, Inc., Cl. A 17,800 536,848 - ------------------------------------------------------------------------------------------------------- Endurance Specialty Holdings Ltd. 31,400 1,234,020 - ------------------------------------------------------------------------------------------------------- Everest Re Group Ltd. 19,200 1,860,096 - ------------------------------------------------------------------------------------------------------- First American Corp. (The) 1 110,100 3,834,783 - ------------------------------------------------------------------------------------------------------- Genworth Financial, Inc., Cl. A 605,200 14,028,536 - ------------------------------------------------------------------------------------------------------- Hartford Financial Services Group, Inc. (The) 267,000 18,663,300 - ------------------------------------------------------------------------------------------------------- HCC Insurance Holdings, Inc. 53,200 1,279,992 - ------------------------------------------------------------------------------------------------------- IPC Holdings Ltd. 34,700 941,064 - ------------------------------------------------------------------------------------------------------- Lincoln National Corp. 36,000 1,839,960 - ------------------------------------------------------------------------------------------------------- Loews Corp. 590,090 24,689,366 - ------------------------------------------------------------------------------------------------------- Max Capital Group Ltd. 21,100 585,314 - ------------------------------------------------------------------------------------------------------- Mercury General Corp. 13,200 601,920 - ------------------------------------------------------------------------------------------------------- MetLife, Inc. 305,600 17,804,256 - ------------------------------------------------------------------------------------------------------- Nationwide Financial Services, Inc., Cl. A 26,100 1,076,625 - ------------------------------------------------------------------------------------------------------- Odyssey Re Holdings Corp. 14,600 528,228 - ------------------------------------------------------------------------------------------------------- Partnerre Holdings Ltd. 24,600 1,891,494 - ------------------------------------------------------------------------------------------------------- Phoenix Cos., Inc. (The) 1 5,800 66,004 - ------------------------------------------------------------------------------------------------------- ProAssurance Corp. 2 17,000 903,890 - ------------------------------------------------------------------------------------------------------- Prudential Financial, Inc. 318,500 23,240,945 SHARES VALUE - ------------------------------------------------------------------------------------------------------- INSURANCE Continued Reinsurance Group of America, Inc. 10,400 $ 568,984 - ------------------------------------------------------------------------------------------------------- RenaissanceRe Holdings Ltd. 29,600 1,625,040 - ------------------------------------------------------------------------------------------------------- Safeco Corp. 33,300 1,540,458 - ------------------------------------------------------------------------------------------------------- StanCorp Financial Group, Inc. 25,700 1,261,613 - ------------------------------------------------------------------------------------------------------- Torchmark Corp. 28,900 1,741,514 - ------------------------------------------------------------------------------------------------------- Travelers Cos., Inc. (The) 1,178,113 54,676,224 - ------------------------------------------------------------------------------------------------------- UnumProvident Corp. 116,100 2,659,851 - -------------------------------------------------------------------------------------- ---------------- XL Capital Ltd., Cl. A 51,900 1,871,514 ---------------- 566,805,563 - ------------------------------------------------------------------------------------------------------- REAL ESTATE INVESTMENT TRUSTS--0.1% General Growth Properties, Inc. 1 156,000 5,508,360 - ------------------------------------------------------------------------------------------------------- REAL ESTATE MANAGEMENT & DEVELOPMENT--0.0% Jones Lang LaSalle, Inc. 17,500 1,336,825 - ------------------------------------------------------------------------------------------------------- HEALTH CARE--9.0% - ------------------------------------------------------------------------------------------------------- BIOTECHNOLOGY--1.0% Amgen, Inc. 2 806,600 36,716,432 - ------------------------------------------------------------------------------------------------------- Biogen Idec, Inc. 2 582,000 33,965,520 - ------------------------------------------------------------------------------------------------------- Genentech, Inc. 2 311,500 23,596,125 - ------------------------------------------------------------------------------------------------------- OSI Pharmaceuticals, Inc. 1,2 8,800 316,360 ---------------- 94,594,437 - ------------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SUPPLIES--0.5% Baxter International, Inc. 763,800 45,079,476 - ------------------------------------------------------------------------------------------------------- Medtronic, Inc. 57,400 2,833,264 ---------------- 47,912,740 - ------------------------------------------------------------------------------------------------------- HEALTH CARE PROVIDERS & SERVICES--4.2% Aetna, Inc. 1,283,600 63,666,560 - ------------------------------------------------------------------------------------------------------- Amedisys, Inc. 2 17,500 748,650 - ------------------------------------------------------------------------------------------------------- AMERIGROUP Corp. 2 26,500 954,000 - ------------------------------------------------------------------------------------------------------- AmerisourceBergen Corp. 86,400 3,604,608 - ------------------------------------------------------------------------------------------------------- Centene Corp. 1,2 44,400 795,648 - ------------------------------------------------------------------------------------------------------- CIGNA Corp. 182,600 8,140,308 17 | OPPENHEIMER MAIN STREET FUND STATEMENT OF INVESTMENTS Unaudited / Continued - -------------------------------------------------------------------------------- SHARES VALUE - ------------------------------------------------------------------------------------------------------- HEALTH CARE PROVIDERS & SERVICES Continued Coventry Health Care, Inc. 2 69,400 $ 3,599,778 - ------------------------------------------------------------------------------------------------------- Express Scripts, Inc. 2 611,700 36,151,470 - ------------------------------------------------------------------------------------------------------- Health Net, Inc. 2 91,900 4,038,086 - ------------------------------------------------------------------------------------------------------- Healthspring, Inc. 2 24,300 426,465 - ------------------------------------------------------------------------------------------------------- Humana, Inc. 2 359,400 24,557,802 - ------------------------------------------------------------------------------------------------------- Lincare Holdings, Inc. 2 78,800 2,561,000 - ------------------------------------------------------------------------------------------------------- McKesson Corp. 406,100 23,862,436 - ------------------------------------------------------------------------------------------------------- Medco Health Solutions, Inc. 2 949,700 42,081,207 - ------------------------------------------------------------------------------------------------------- Omnicare, Inc. 140,100 2,939,298 - ------------------------------------------------------------------------------------------------------- UnitedHealth Group, Inc. 1,971,994 91,658,281 - ------------------------------------------------------------------------------------------------------- WellPoint, Inc. 2 1,167,872 81,844,470 ---------------- 391,630,067 - ------------------------------------------------------------------------------------------------------- LIFE SCIENCES TOOLS & SERVICES--0.1% Applera Corp./Applied Biosystems Group 72,200 2,433,862 - ------------------------------------------------------------------------------------------------------- Invitrogen Corp. 2 52,500 4,435,725 ---------------- 6,869,587 - ------------------------------------------------------------------------------------------------------- PHARMACEUTICALS--3.2% Abbott Laboratories 90,300 4,835,565 - ------------------------------------------------------------------------------------------------------- Endo Pharmaceuticals Holdings, Inc. 2 107,000 2,809,820 - ------------------------------------------------------------------------------------------------------- Forest Laboratories, Inc. 2 349,000 13,879,730 - ------------------------------------------------------------------------------------------------------- Johnson & Johnson 2,305,044 142,820,526 - ------------------------------------------------------------------------------------------------------- King Pharmaceuticals, Inc.2 363,700 3,855,220 - ------------------------------------------------------------------------------------------------------- Merck & Co., Inc. 797,010 35,307,543 - ------------------------------------------------------------------------------------------------------- Pfizer, Inc. 3,714,792 82,765,566 - ------------------------------------------------------------------------------------------------------- Sciele Pharma, Inc. 2 17,600 364,320 - ------------------------------------------------------------------------------------------------------- Wyeth 367,200 16,017,264 ---------------- 302,655,554 - ------------------------------------------------------------------------------------------------------- INDUSTRIALS--10.6% - ------------------------------------------------------------------------------------------------------- AEROSPACE & DEFENSE--3.2% AAR Corp. 2 28,700 743,043 - ------------------------------------------------------------------------------------------------------- Boeing Co. 651,900 53,970,801 SHARES VALUE - ------------------------------------------------------------------------------------------------------- AEROSPACE & DEFENSE Continued Ceradyne, Inc. 2 19,900 $ 619,089 - ------------------------------------------------------------------------------------------------------- DRS Technologies, Inc. 25,500 1,430,295 - ------------------------------------------------------------------------------------------------------- Esterline Technologies Corp. 2 15,400 806,960 - ------------------------------------------------------------------------------------------------------- Honeywell International, Inc. 857,200 49,323,288 - ------------------------------------------------------------------------------------------------------- L-3 Communications Holdings, Inc. 1 311,050 33,061,505 - ------------------------------------------------------------------------------------------------------- Northrop Grumman Corp. 641,070 50,394,513 - ------------------------------------------------------------------------------------------------------- Raytheon Co. 682,200 44,233,848 - ------------------------------------------------------------------------------------------------------- TransDigm Group, Inc. 2 19,900 773,314 - ------------------------------------------------------------------------------------------------------- Triumph Group, Inc. 1 16,300 922,417 - ------------------------------------------------------------------------------------------------------- United Technologies Corp. 897,100 63,254,521 ---------------- 299,533,594 - ------------------------------------------------------------------------------------------------------- AIRLINES--0.1% Continental Airlines, Inc., Cl. B 2 156,200 3,776,916 - ------------------------------------------------------------------------------------------------------- JetBlue Airways Corp. 2 142,000 773,900 - ------------------------------------------------------------------------------------------------------- Northwest Airlines Corp. 2 86,242 1,158,230 - ------------------------------------------------------------------------------------------------------- SkyWest, Inc. 1 41,400 915,768 - ------------------------------------------------------------------------------------------------------- Southwest Airlines Co. 220,400 2,702,104 - ------------------------------------------------------------------------------------------------------- UAL Corp. 1 73,400 2,224,020 ---------------- 11,550,938 - ------------------------------------------------------------------------------------------------------- BUILDING PRODUCTS--0.0% USG Corp. 1,2 94,500 3,215,835 - ------------------------------------------------------------------------------------------------------- COMMERCIAL SERVICES & SUPPLIES--0.2% ChoicePoint, Inc. 2 27,200 1,316,480 - ------------------------------------------------------------------------------------------------------- Corporate Executive Board Co. (The) 6,000 243,660 - ------------------------------------------------------------------------------------------------------- IHS, Inc., Cl. A 2 16,800 1,035,720 - ------------------------------------------------------------------------------------------------------- Ikon Office Solutions, Inc. 70,500 501,960 - ------------------------------------------------------------------------------------------------------- Manpower, Inc. 28,800 1,632,960 - ------------------------------------------------------------------------------------------------------- Miller (Herman), Inc. 31,200 930,696 - ------------------------------------------------------------------------------------------------------- Robert Half International, Inc. 112,400 3,029,180 18 | OPPENHEIMER MAIN STREET FUND SHARES VALUE - ------------------------------------------------------------------------------------------------------- COMMERCIAL SERVICES & SUPPLIES Continued Steelcase, Inc., Cl. A 46,500 $ 659,370 - ------------------------------------------------------------------------------------------------------- United Stationers, Inc. 2 14,400 710,784 - ------------------------------------------------------------------------------------------------------- Waste Management, Inc. 131,600 4,320,428 - ------------------------------------------------------------------------------------------------------- Watson Wyatt & Co. Holdings 18,100 960,205 ---------------- 15,341,443 - ------------------------------------------------------------------------------------------------------- CONSTRUCTION & ENGINEERING--0.1% EMCOR Group, Inc. 2 40,000 963,600 - ------------------------------------------------------------------------------------------------------- Fluor Corp. 12,474 1,737,005 - ------------------------------------------------------------------------------------------------------- KBR, Inc. 2 62,500 2,083,125 - ------------------------------------------------------------------------------------------------------- Perini Corp. 2 27,200 1,019,456 ------------------------------------------------------------------------------------------------------- Shaw Group, Inc. (The) 2 26,100 1,680,318 - ------------------------------------------------------------------------------------------------------- URS Corp. 2 30,600 1,232,568 ---------------- 8,716,072 - ------------------------------------------------------------------------------------------------------- ELECTRICAL EQUIPMENT--0.2% Acuity Brands, Inc. 24,900 1,105,809 - ------------------------------------------------------------------------------------------------------- Belden, Inc. 21,800 856,740 - ------------------------------------------------------------------------------------------------------- Emerson Electric Co. 182,600 9,305,296 - ------------------------------------------------------------------------------------------------------- GrafTech International Ltd. 2 62,300 998,046 - ------------------------------------------------------------------------------------------------------- Regal-Beloit Corp. 13,300 491,036 - ------------------------------------------------------------------------------------------------------- Smith (A.O.) Corp. 26,300 958,109 - ------------------------------------------------------------------------------------------------------- Thomas & Betts Corp. 2 74,800 3,003,220 - ------------------------------------------------------------------------------------------------------- Woodward Governor Co. 24,500 699,965 ---------------- 17,418,221 - ------------------------------------------------------------------------------------------------------- INDUSTRIAL CONGLOMERATES--4.8% 3M Co. 770,600 60,415,040 - ------------------------------------------------------------------------------------------------------- General Electric Co. 9,470,884 313,865,096 - ------------------------------------------------------------------------------------------------------- Teleflex, Inc. 14,900 842,595 - ------------------------------------------------------------------------------------------------------- Textron, Inc. 214,300 11,608,631 - ------------------------------------------------------------------------------------------------------- Tyco International Ltd. 1,672,925 67,017,376 - ------------------------------------------------------------------------------------------------------- Walter Industries, Inc. 26,000 1,420,380 ---------------- 455,169,118 SHARES VALUE - ------------------------------------------------------------------------------------------------------- MACHINERY--2.0% Actuant Corp., Cl. A 33,300 $ 895,104 - ------------------------------------------------------------------------------------------------------- Barnes Group, Inc. 31,600 718,584 - ------------------------------------------------------------------------------------------------------- Briggs & Stratton Corp. 1 41,500 741,605 - ------------------------------------------------------------------------------------------------------- Caterpillar, Inc. 865,200 62,579,916 - ------------------------------------------------------------------------------------------------------- Cummins, Inc. 325,000 16,373,500 - ------------------------------------------------------------------------------------------------------- Deere & Co. 307,200 26,176,512 - ------------------------------------------------------------------------------------------------------- Eaton Corp. 238,600 19,238,318 - ------------------------------------------------------------------------------------------------------- IDEX Corp. 22,300 672,568 - ------------------------------------------------------------------------------------------------------- Ingersoll-Rand Co. Ltd., Cl. A 1 373,700 15,643,082 - ------------------------------------------------------------------------------------------------------- Paccar, Inc. 133,700 5,799,906 - ------------------------------------------------------------------------------------------------------- Parker-Hannifin Corp. 1 514,530 33,254,074 - ------------------------------------------------------------------------------------------------------- Pentair, Inc. 22,100 720,902 - ------------------------------------------------------------------------------------------------------- Robbins & Myers, Inc. 29,000 987,450 - ------------------------------------------------------------------------------------------------------- SPX Corp. 7,500 767,250 - ------------------------------------------------------------------------------------------------------- Timken Co. 30,900 931,017 - ------------------------------------------------------------------------------------------------------- Toro Co. (The) 12,200 587,796 ---------------- 186,087,584 - ------------------------------------------------------------------------------------------------------- MARINE--0.0% TBS International Ltd., Cl. A 1,2 26,900 926,436 - ------------------------------------------------------------------------------------------------------- TRADING COMPANIES & DISTRIBUTORS--0.0% Applied Industrial Technologies, Inc. 32,400 895,536 - ------------------------------------------------------------------------------------------------------- United Rentals, Inc. 2 52,000 1,045,200 ---------------- 1,940,736 - ------------------------------------------------------------------------------------------------------- INFORMATION TECHNOLOGY--26.9% - ------------------------------------------------------------------------------------------------------- COMMUNICATIONS EQUIPMENT--4.7% Blue Coat Systems, Inc. 2 35,600 835,888 - ------------------------------------------------------------------------------------------------------- Cisco Systems, Inc. 2 7,076,400 172,451,868 - ------------------------------------------------------------------------------------------------------- CommScope, Inc. 2 91,600 3,836,208 - ------------------------------------------------------------------------------------------------------- EchoStar Holding Corp. 2 89,524 3,586,331 - ------------------------------------------------------------------------------------------------------- Foundry Networks, Inc. 2 212,200 2,518,814 - ------------------------------------------------------------------------------------------------------- Harmonic, Inc. 2 103,200 919,512 - ------------------------------------------------------------------------------------------------------- Harris Corp. 36,600 1,787,178 - ------------------------------------------------------------------------------------------------------- Juniper Networks, Inc. 2 852,074 22,852,625 19 | OPPENHEIMER MAIN STREET FUND STATEMENT OF INVESTMENTS Unaudited / Continued - -------------------------------------------------------------------------------- SHARES VALUE - ---------------------------------------------------------------------------------------------------------------------- COMMUNICATIONS EQUIPMENT Continued Motorola, Inc. 1,248,900 $ 12,451,533 - ---------------------------------------------------------------------------------------------------------------------- Plantronics, Inc. 50,800 958,088 - ---------------------------------------------------------------------------------------------------------------------- QUALCOMM, Inc. 1 5,151,275 218,259,522 - ---------------------------------------------------------------------------------------------------------------------- Tellabs, Inc. 1,2 277,700 1,827,266 -------------- 442,284,833 - ---------------------------------------------------------------------------------------------------------------------- COMPUTERS & PERIPHERALS--8.0% Apple, Inc. 2 1,059,100 132,408,682 - ---------------------------------------------------------------------------------------------------------------------- Brocade Communications Systems, Inc. 2 180,300 1,386,507 - ---------------------------------------------------------------------------------------------------------------------- Dell, Inc. 2 2,139,800 42,475,030 - ---------------------------------------------------------------------------------------------------------------------- EMC Corp. 2 1,756,700 27,299,118 - ---------------------------------------------------------------------------------------------------------------------- Hewlett-Packard Co. 5,682,200 271,438,694 - ---------------------------------------------------------------------------------------------------------------------- International Business Machines Corp. 1,927,200 219,430,992 - ---------------------------------------------------------------------------------------------------------------------- Lexmark International, Inc., Cl. A 2 112,900 3,729,087 - ---------------------------------------------------------------------------------------------------------------------- NCR Corp. 2 167,400 3,709,584 - ---------------------------------------------------------------------------------------------------------------------- Network Appliance, Inc. 2 207,900 4,494,798 - ---------------------------------------------------------------------------------------------------------------------- SanDisk Corp. 2 88,900 2,093,595 - ---------------------------------------------------------------------------------------------------------------------- Seagate Technology 1 1,589,420 34,283,789 - ---------------------------------------------------------------------------------------------------------------------- Teradata Corp. 2 105,200 2,654,196 - ---------------------------------------------------------------------------------------------------------------------- Western Digital Corp. 2 83,300 2,571,471 -------------- 747,975,543 - ---------------------------------------------------------------------------------------------------------------------- ELECTRONIC EQUIPMENT & INSTRUMENTS--0.5% Agilent Technologies, Inc. 2 1,102,200 33,738,342 - ---------------------------------------------------------------------------------------------------------------------- Arrow Electronics, Inc. 2 116,300 3,792,543 - ---------------------------------------------------------------------------------------------------------------------- Avnet, Inc. 2 123,100 4,149,701 - ---------------------------------------------------------------------------------------------------------------------- Benchmark Electronics, Inc. 2 26,400 443,520 - ---------------------------------------------------------------------------------------------------------------------- Molex, Inc. 56,000 1,261,680 - ---------------------------------------------------------------------------------------------------------------------- Plexus Corp. 2 22,900 567,233 - ---------------------------------------------------------------------------------------------------------------------- Rofin-Sinar Technologies, Inc. 2 24,900 980,313 -------------- 44,933,332 SHARES VALUE - ---------------------------------------------------------------------------------------------------------------------- INTERNET SOFTWARE & SERVICES--1.9% Bankrate, Inc. 1,2 20,200 $ 853,652 - ---------------------------------------------------------------------------------------------------------------------- eBay, Inc. 2 1,943,100 51,220,116 - ---------------------------------------------------------------------------------------------------------------------- Google, Inc., Cl. A 2 268,200 126,370,476 - ---------------------------------------------------------------------------------------------------------------------- Open Text Corp. 1,2 30,200 972,440 - ---------------------------------------------------------------------------------------------------------------------- Sohu.com, Inc. 2 20,600 928,648 -------------- 180,345,332 - ---------------------------------------------------------------------------------------------------------------------- IT SERVICES--1.5% Accenture Ltd., Cl. A 1,578,500 55,642,125 - ---------------------------------------------------------------------------------------------------------------------- Automatic Data Processing, Inc. 989,400 39,526,530 - ---------------------------------------------------------------------------------------------------------------------- Computer Sciences Corp. 2 99,500 4,323,275 - ---------------------------------------------------------------------------------------------------------------------- Convergys Corp. 2 55,400 799,976 - ---------------------------------------------------------------------------------------------------------------------- CyberSource Corp. 2 49,400 721,734 - ---------------------------------------------------------------------------------------------------------------------- DST Systems, Inc. 1,2 53,600 3,765,936 - ---------------------------------------------------------------------------------------------------------------------- Electronic Data Systems Corp. 1,888,700 32,712,284 - ---------------------------------------------------------------------------------------------------------------------- Euronet Worldwide, Inc. 2 11,300 244,080 - ---------------------------------------------------------------------------------------------------------------------- Hewitt Associates, Inc. 2 79,000 3,117,340 - ---------------------------------------------------------------------------------------------------------------------- SAIC, Inc. 2 73,400 1,399,004 - ---------------------------------------------------------------------------------------------------------------------- VeriFone Holdings, Inc. 1,2 47,400 978,810 -------------- 143,231,094 - ---------------------------------------------------------------------------------------------------------------------- OFFICE ELECTRONICS--0.3% Xerox Corp. 2,069,900 30,427,530 - ---------------------------------------------------------------------------------------------------------------------- Zebra Technologies Corp., Cl. A 2 13,600 453,152 -------------- 30,880,682 - ---------------------------------------------------------------------------------------------------------------------- SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT--4.7% Analog Devices, Inc. 381,300 10,264,596 - ---------------------------------------------------------------------------------------------------------------------- Applied Materials, Inc. 3,045,900 58,389,903 - ---------------------------------------------------------------------------------------------------------------------- Atmel Corp. 2 288,100 936,325 - ---------------------------------------------------------------------------------------------------------------------- Broadcom Corp., Cl. A 2 138,000 2,609,580 - ---------------------------------------------------------------------------------------------------------------------- Cypress Semiconductor Corp. 2 87,500 1,902,250 - ---------------------------------------------------------------------------------------------------------------------- Intel Corp. 8,395,800 167,496,210 - ---------------------------------------------------------------------------------------------------------------------- Intersil Corp., Cl. A 140,300 3,264,781 20 | OPPENHEIMER MAIN STREET FUND SHARES VALUE - ---------------------------------------------------------------------------------------------------------------------- SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT Continued KLA-Tencor Corp. 62,700 $ 2,634,027 - ---------------------------------------------------------------------------------------------------------------------- Lam Research Corp. 2 71,800 2,889,232 - ---------------------------------------------------------------------------------------------------------------------- MEMC Electronic Materials, Inc. 2 550,100 41,961,628 - ---------------------------------------------------------------------------------------------------------------------- Novellus Systems, Inc. 2 155,000 3,422,400 - ---------------------------------------------------------------------------------------------------------------------- NVIDIA Corp. 2 2,025,900 43,334,001 - ---------------------------------------------------------------------------------------------------------------------- OmniVision Technologies, Inc. 1,2 65,700 1,042,002 - ---------------------------------------------------------------------------------------------------------------------- PMC-Sierra, Inc. 1,2 199,700 956,563 - ---------------------------------------------------------------------------------------------------------------------- Semtech Corp. 2 78,400 998,816 - ---------------------------------------------------------------------------------------------------------------------- Sigma Designs, Inc. 2 27,400 806,930 - ---------------------------------------------------------------------------------------------------------------------- Silicon Laboratories,Inc. 31,200 965,640 - ---------------------------------------------------------------------------------------------------------------------- Skyworks Solutions, Inc. 2 111,200 918,512 - ---------------------------------------------------------------------------------------------------------------------- Texas Instruments, Inc. 2,905,200 87,039,792 - ---------------------------------------------------------------------------------------------------------------------- Varian Semiconductor Equipment Associates, Inc. 2 101,900 3,442,182 - ---------------------------------------------------------------------------------------------------------------------- Xilinx, Inc. 203,500 4,550,260 -------------- 439,825,630 - ---------------------------------------------------------------------------------------------------------------------- SOFTWARE--5.3% Activision, Inc. 2 163,900 4,466,275 - ---------------------------------------------------------------------------------------------------------------------- Adobe Systems, Inc. 2 915,900 30,820,035 - ---------------------------------------------------------------------------------------------------------------------- Advent Software, Inc. 2 20,400 916,776 - ---------------------------------------------------------------------------------------------------------------------- Ansys, Inc. 1,2 46,000 1,719,020 - ---------------------------------------------------------------------------------------------------------------------- Autodesk, Inc. 2 119,100 3,702,819 - ---------------------------------------------------------------------------------------------------------------------- BEA Systems, Inc. 2 342,000 6,521,940 - ---------------------------------------------------------------------------------------------------------------------- BMC Software, Inc. 2 154,000 4,971,120 - ---------------------------------------------------------------------------------------------------------------------- CA, Inc. 411,800 9,421,984 - ---------------------------------------------------------------------------------------------------------------------- Cadence Design Systems, Inc. 2 252,400 2,680,488 - ---------------------------------------------------------------------------------------------------------------------- Check Point Software Technologies Ltd. 2 100,900 2,211,728 - ---------------------------------------------------------------------------------------------------------------------- Compuware Corp. 2 420,400 3,346,384 - ---------------------------------------------------------------------------------------------------------------------- Macrovision Corp. 1,2 22,200 339,438 - ---------------------------------------------------------------------------------------------------------------------- McAfee, Inc. 2 121,700 4,048,959 - ---------------------------------------------------------------------------------------------------------------------- MICROS Systems,Inc. 2 79,800 2,556,792 - ---------------------------------------------------------------------------------------------------------------------- Microsoft Corp. 11,101,054 302,170,690 SHARES VALUE - ---------------------------------------------------------------------------------------------------------------------- SOFTWARE Continued MicroStrategy, Inc., Cl. A 2 11,400 $ 758,328 - ---------------------------------------------------------------------------------------------------------------------- Net 1 UEPS Technologies, Inc. 2 27,400 797,340 - ---------------------------------------------------------------------------------------------------------------------- Novell, Inc. 2 542,000 4,037,900 - ---------------------------------------------------------------------------------------------------------------------- Oracle Corp. 2 3,029,800 56,960,240 - ---------------------------------------------------------------------------------------------------------------------- Quest Software, Inc. 2 53,500 761,305 - ---------------------------------------------------------------------------------------------------------------------- Red Hat, Inc. 2 9,200 164,036 - ---------------------------------------------------------------------------------------------------------------------- Sybase, Inc. 2 59,800 1,591,876 - ---------------------------------------------------------------------------------------------------------------------- Symantec Corp. 2 2,923,800 49,236,792 - ---------------------------------------------------------------------------------------------------------------------- Synopsys, Inc. 2 97,800 2,269,938 - ---------------------------------------------------------------------------------------------------------------------- TIBCO Software, Inc. 2 114,400 806,520 -------------- 497,278,723 - ---------------------------------------------------------------------------------------------------------------------- MATERIALS--4.2% - ---------------------------------------------------------------------------------------------------------------------- CHEMICALS--1.4% Ashland, Inc. 28,500 1,258,845 - ---------------------------------------------------------------------------------------------------------------------- CF Industries Holdings, Inc. 21,100 2,575,888 - ---------------------------------------------------------------------------------------------------------------------- Cytec Industries, Inc. 23,000 1,317,440 - ---------------------------------------------------------------------------------------------------------------------- Dow Chemical Co. (The) 653,300 24,622,877 - ---------------------------------------------------------------------------------------------------------------------- Hercules, Inc. 53,300 976,456 - ---------------------------------------------------------------------------------------------------------------------- Monsanto Co. 524,400 60,662,592 - ---------------------------------------------------------------------------------------------------------------------- Mosaic Co. (The) 2 247,470 27,543,411 - ---------------------------------------------------------------------------------------------------------------------- NewMarket Corp. 11,900 796,705 - ---------------------------------------------------------------------------------------------------------------------- OM Group, Inc. 2 17,300 1,047,169 - ---------------------------------------------------------------------------------------------------------------------- Scotts Miracle-Gro Co. (The), Cl. A 36,000 1,281,240 - ---------------------------------------------------------------------------------------------------------------------- Terra Industries, Inc. 1,2 86,500 3,910,665 - ---------------------------------------------------------------------------------------------------------------------- Zep, Inc. 2,550 40,035 -------------- 126,033,323 - ---------------------------------------------------------------------------------------------------------------------- CONTAINERS & PACKAGING--0.0% Greif, Inc., Cl. A 11,600 758,524 - ---------------------------------------------------------------------------------------------------------------------- Owens-Illinois, Inc. 2 35,700 2,015,265 - ---------------------------------------------------------------------------------------------------------------------- Rock-Tenn Co., Cl. A 35,600 955,148 -------------- 3,728,937 21 | OPPENHEIMER MAIN STREET FUND STATEMENT OF INVESTMENTS Unaudited / Continued - -------------------------------------------------------------------------------- SHARES VALUE - ----------------------------------------------------------------------------------------------------------------------- METALS & MINING--2.8% AK Steel Holding Corp. 71,800 $ 3,778,116 - ----------------------------------------------------------------------------------------------------------------------- Alcoa, Inc. 891,300 33,102,882 - ----------------------------------------------------------------------------------------------------------------------- Carpenter Technology Corp. 43,300 2,720,539 - ----------------------------------------------------------------------------------------------------------------------- Compass Minerals International, Inc. 13,800 785,496 - ----------------------------------------------------------------------------------------------------------------------- Freeport-McMoRan Copper & Gold, Inc., Cl. B 457,800 46,173,708 - ----------------------------------------------------------------------------------------------------------------------- Hecla Mining Co. 1,2 97,300 1,118,950 - ----------------------------------------------------------------------------------------------------------------------- Kaiser Aluminum Corp. 10,500 770,175 - ----------------------------------------------------------------------------------------------------------------------- Nucor Corp. 1,093,300 70,594,381 - ----------------------------------------------------------------------------------------------------------------------- Reliance Steel & Aluminum Co. 55,900 3,100,214 - ----------------------------------------------------------------------------------------------------------------------- Schnitzer Steel Industries, Inc. 15,400 1,008,238 - ----------------------------------------------------------------------------------------------------------------------- Southern Copper Corp. 1 560,610 63,971,207 - ----------------------------------------------------------------------------------------------------------------------- United States Steel Corp. 335,100 36,341,595 - ----------------------------------------------------------------------------------------------------------------------- Worthington Industries, Inc. 1 56,000 985,040 ---------------- 264,450,541 - ----------------------------------------------------------------------------------------------------------------------- PAPER & FOREST PRODUCTS--0.0% AbitibiBowater, Inc. 1 46,800 484,380 - ----------------------------------------------------------------------------------------------------------------------- Domtar Corp. 2 102,300 651,651 ---------------- 1,136,031 - ----------------------------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES--2.6% - ----------------------------------------------------------------------------------------------------------------------- DIVERSIFIED TELECOMMUNICATION SERVICES--2.5% AT&T, Inc. 5,239,244 182,482,869 - ----------------------------------------------------------------------------------------------------------------------- CenturyTel, Inc. 102,700 3,716,713 - ----------------------------------------------------------------------------------------------------------------------- Qwest Communications International, Inc. 1 2,682,100 14,483,340 - ----------------------------------------------------------------------------------------------------------------------- Verizon Communications, Inc. 853,100 30,984,592 ---------------- 231,667,514 - ----------------------------------------------------------------------------------------------------------------------- WIRELESS TELECOMMUNICATION SERVICES--0.1% Sprint Nextel Corp. 1,323,588 9,410,711 - ----------------------------------------------------------------------------------------------------------------------- Telephone & Data Systems, Inc. 58,300 2,734,270 ---------------- 12,144,981 SHARES VALUE - ----------------------------------------------------------------------------------------------------------------------- UTILITIES--0.1% - ----------------------------------------------------------------------------------------------------------------------- ENERGY TRADERS--0.1% Mirant Corp. 2 78,800 $ 2,915,600 - ----------------------------------------------------------------------------------------------------------------------- NRG Energy, Inc. 2 57,900 2,389,533 ---------------- 5,305,133 - ----------------------------------------------------------------------------------------------------------------------- GAS UTILITIES--0.0% Northwest Natural Gas Co. 12,700 533,908 - ----------------------------------------------------------------------------------------------------------------------- WGL Holdings, Inc. 30,400 948,173 ---------------- 1,482,081 ---------------- Total Common Stocks (Cost $8,478,429,094) 9,348,910,033 - ----------------------------------------------------------------------------------------------------------------------- PREFERRED STOCKS--0.0% - ----------------------------------------------------------------------------------------------------------------------- Wachovia Corp., Dividend Equalization Preferred Shares 2,4 (Cost $0) 100,000 150 UNITS - ----------------------------------------------------------------------------------------------------------------------- RIGHTS, WARRANTS AND CERTIFICATES--0.0% - ----------------------------------------------------------------------------------------------------------------------- Dime Bancorp, Inc. Wts., Exp. 1/2/10 2 485,800 63,154 - ----------------------------------------------------------------------------------------------------------------------- Progress Energy, Inc., Contingent Value Obligation 2,4 680,100 224,433 ------------- Total Rights, Warrants and Certificates (Cost $0) 287,587 SHARES - ----------------------------------------------------------------------------------------------------------------------- OTHER SECURITIES--0.0% - ----------------------------------------------------------------------------------------------------------------------- Seagate Technology International, Inc. 2,3,4 (Cost $--) 877,600 87,760 - ----------------------------------------------------------------------------------------------------------------------- INVESTMENT COMPANY--0.7% - ----------------------------------------------------------------------------------------------------------------------- Oppenheimer Institutional Money Market Fund, Cl. E, 3.99% 5,6 (Cost $ 64,239,217) 64,239,217 64,239,217 - ----------------------------------------------------------------------------------------------------------------------- Total Investments, at Value (excluding Investments Purchased with Cash Collateral from Securities Loaned) (Cost $8,542,668,311) 9,413,524,747 22 | OPPENHEIMER MAIN STREET FUND PRINCIPAL AMOUNT VALUE - ------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------ INVESTMENTS PURCHASED WITH CASH COLLATERAL FROM SECURITIES LOANED--5.9% 7 - ------------------------------------------------------------------------------------------------------------------ Undivided interest of 35% in joint repurchase agreement (Principal Amount/ Value $1,000,000,000, with a maturity value of $ 1,000,266,667) with Societe Generale, NY Branch, 3.20%, dated 2/29/08, to be repurchased at $350,093,333 on 3/3/08, collateralized by U.S. Agency Mortgages, 3.219%-7.50%, 5/20/32-12/1/37, with a value of $1,020,000,000 $ 350,000,000 $ 350,000,000 - ------------------------------------------------------------------------------------------------------------------ Undivided interest of 5% in joint repurchase agreement (Principal Amount/Value $1,000,000,000, with a maturity value of $1,000,264,167) with Banc of America Securities LLC, 3.17%, dated 2/29/08, to be repurchased at $50,013,208 on 3/3/08, collateralized by U.S. Agency Mortgages, 0%-11%, 9/25/09-7/1/37, with a value of $1,020,000,000 50,000,000 50,000,000 PRINCIPAL AMOUNT VALUE - ------------------------------------------------------------------------------------------------------------------ INVESTMENTS PURCHASED WITH CASH COLLATERAL FROM SECURITIES LOANED Continued - ------------------------------------------------------------------------------------------------------------------ Undivided interest of 7.92% in joint repurchase agreement (Principal Amount/Value $2,000,000,000, with a maturity value of $2,000,530,000) with BNP Paribas Securities Corp., 3.18%, dated 2/29/08, to be repurchased at $158,520,889 on 3/3/08, collateralized by U.S. Agency Mortgages, 0%-6.50%, 2/1/34-3/1/38, with a value of $2,040,000,000 158,478,892 $ 158,478,892 --------------- Total Investments Purchased with Cash Collateral from Securities Loaned (Cost $558,478,892) 558,478,892 - ------------------------------------------------------------------------------------------------------------------ TOTAL INVESTMENTS, AT VALUE (COST $9,101,147,203) 106.0% 9,972,003,639 - ------------------------------------------------------------------------------------------------------------------ LIABILITIES IN EXCESS OF OTHER ASSETS (6.0) (564,531,408) -------------------------------- NET ASSETS 100.0% $9,407,472,231 ================================ FOOTNOTES TO STATEMENT OF INVESTMENTS 1. Partial or fully-loaned security. See Note 6 of accompanying Notes. 2. Non-income producing security. 3. Escrow shares received as the result of issuer reorganization. 4. Illiquid security. The aggregate value of illiquid securities as of February 29, 2008 was $312,343, which represents less than 0.005% of the Fund's net assets. See Note 5 of accompanying Notes. 5. Is or was an affiliate, as defined in the Investment Company Act of 1940, at or during the period ended February 29, 2008, by virtue of the Fund owning at least 5% of the voting securities of the issuer or as a result of the Fund and the issuer having the same investment adviser. Transactions during the period in which the issuer was an affiliate are as follows: SHARES GROSS GROSS SHARES AUGUST 31, 2007 ADDITIONS REDUCTIONS FEBRUARY 29, 2008 - ---------------------------------------------------------------------------------------------- Oppenheimer Institutional Money Market Fund, Cl. E -- 1,015,177,646 950,938,429 64,239,217 DIVIDEND VALUE INCOME - ---------------------------------------------------------------------------------------------- Oppenheimer Institutional Money Market Fund, Cl. E $ 64,239,217 $ 1,087,999 6. Rate shown is the 7-day yield as of February 29, 2008. 7. The security/securities have been segregated to satisfy the forward commitment to return the cash collateral received in securities lending transactions upon the borrower's return of the securities loaned. See Note 6 of accompanying Notes. SEE ACCOMPANYING NOTES TO FINANCIAL STATEMENTS. 23 | OPPENHEIMER MAIN STREET FUND STATEMENT OF ASSETS AND LIABILITIES Unaudited - -------------------------------------------------------------------------------- February 29, 2008 - -------------------------------------------------------------------------------------- - -------------------------------------------------------------------------------------- ASSETS - -------------------------------------------------------------------------------------- Investments, at value--see accompanying statement of investments: Unaffiliated companies (cost $9,036,907,986) $ 9,907,764,422 Affiliated companies (cost $64,239,217) 64,239,217 ----------------- 9,972,003,639 - -------------------------------------------------------------------------------------- Cash 11,487,968 - -------------------------------------------------------------------------------------- Receivables and other assets: Investments sold 134,508,741 Interest and dividends 20,815,828 Shares of capital stock sold 2,759,266 Other 553,488 ----------------- Total assets 10,142,128,930 - -------------------------------------------------------------------------------------- LIABILITIES - -------------------------------------------------------------------------------------- Return of collateral for securities loaned 558,478,892 - -------------------------------------------------------------------------------------- Payables and other liabilities: Investments purchased 154,650,601 Shares of capital stock redeemed 15,262,326 Distribution and service plan fees 3,638,107 Transfer and shareholder servicing agent fees 1,387,270 Shareholder communications 1,030,485 Directors' compensation 140,391 Other 68,627 ----------------- Total liabilities 734,656,699 - -------------------------------------------------------------------------------------- NET ASSETS $ 9,407,472,231 ================= - -------------------------------------------------------------------------------------- COMPOSITION OF NET ASSETS - -------------------------------------------------------------------------------------- Par value of shares of capital stock $ 2,873,674 - -------------------------------------------------------------------------------------- Additional paid-in capital 8,847,474,135 - -------------------------------------------------------------------------------------- Accumulated net investment income 19,617,496 - -------------------------------------------------------------------------------------- Accumulated net realized loss on investments (333,349,510) - -------------------------------------------------------------------------------------- Net unrealized appreciation on investments 870,856,436 ----------------- NET ASSETS $ 9,407,472,231 ================= 24 | OPPENHEIMER MAIN STREET FUND - ------------------------------------------------------------------------------------------- NET ASSET VALUE PER SHARE - ------------------------------------------------------------------------------------------- Class A Shares: Net asset value and redemption price per share (based on net assets of $6,644,581,622 and 201,626,858 shares of capital stock outstanding) $ 32.95 Maximum offering price per share (net asset value plus sales charge of 5.75% of offering price) $ 34.96 - ------------------------------------------------------------------------------------------- Class B Shares: Net asset value, redemption price (excludes applicable contingent deferred sales charge) and offering price per share (based on net assets of $902,773,987 and 28,275,788 shares of capital stock outstanding) $ 31.93 - ------------------------------------------------------------------------------------------- Class C Shares: Net asset value, redemption price (excludes applicable contingent deferred sales charge) and offering price per share (based on net assets of $907,681,762 and 28,555,350 shares of capital stock outstanding) $ 31.79 - ------------------------------------------------------------------------------------------- Class N Shares: Net asset value, redemption price (excludes applicable contingent deferred sales charge) and offering price per share (based on net assets of $196,899,398 and 6,065,932 shares of capital stock outstanding) $ 32.46 - ------------------------------------------------------------------------------------------- Class Y Shares: Net asset value, redemption price and offering price per share (based on net assets of $ 755,535,462 and 22,843,500 shares of capital stock outstanding) $ 33.07 SEE ACCOMPANYING NOTES TO FINANCIAL STATEMENTS. 25 | OPPENHEIMER MAIN STREET FUND STATEMENT OF OPERATIONS Unaudited - -------------------------------------------------------------------------------- For the Six Months Ended February 29, 2008 - --------------------------------------------------------------------------------- - --------------------------------------------------------------------------------- INVESTMENT INCOME - --------------------------------------------------------------------------------- Dividends: Unaffiliated companies $ 104,837,192 Affiliated companies 1,087,999 - --------------------------------------------------------------------------------- Interest 244,716 - --------------------------------------------------------------------------------- Portfolio lending fees 826,993 - --------------------------------------------------------------------------------- Other income 299,162 ------------------- Total investment income 107,296,062 - --------------------------------------------------------------------------------- EXPENSES - --------------------------------------------------------------------------------- Management fees 24,759,063 - --------------------------------------------------------------------------------- Distribution and service plan fees: Class A 9,325,005 Class B 5,376,504 Class C 5,252,611 Class N 556,926 - --------------------------------------------------------------------------------- Transfer and shareholder servicing agent fees: Class A 6,813,291 Class B 839,844 Class C 893,847 Class N 212,584 Class Y 102,498 - --------------------------------------------------------------------------------- Shareholder communications: Class A 618,304 Class B 189,587 Class C 68,492 Class N 7,106 Class Y 279 - --------------------------------------------------------------------------------- Custodian fees and expenses 98,186 - --------------------------------------------------------------------------------- Directors' compensation 90,208 - --------------------------------------------------------------------------------- Administration service fees 750 - --------------------------------------------------------------------------------- Other 170,456 ---------------- Total expenses 55,375,541 Less reduction to custodian expenses (13,181) Less waivers and reimbursements of expenses (22,215) ------------------- Net expenses 55,340,145 - --------------------------------------------------------------------------------- Net Investment Income 51,955,917 SEE ACCOMPANYING NOTES TO FINANCIAL STATEMENTS. 26 | OPPENHEIMER MAIN STREET FUND - --------------------------------------------------------------------------------- REALIZED AND UNREALIZED GAIN (LOSS) - --------------------------------------------------------------------------------- Net realized gain on investments from unaffiliated companies $ 81,113,165 - --------------------------------------------------------------------------------- Net change in unrealized appreciation on investments (1,449,782,777) - --------------------------------------------------------------------------------- NET DECREASE IN NET ASSETS RESULTING FROM OPERATIONS $ (1,316,713,695) =================== SEE ACCOMPANYING NOTES TO FINANCIAL STATEMENTS. 27 | OPPENHEIMER MAIN STREET FUND STATEMENTS OF CHANGES IN NET ASSETS - ------------------------------------------------------------------------------- SIX MONTHS YEAR ENDED ENDED FEBRUARY 29, 2008 AUGUST 31, (UNAUDITED) 2007 - -------------------------------------------------------------------------------------------------------------------------- - -------------------------------------------------------------------------------------------------------------------------- OPERATIONS - -------------------------------------------------------------------------------------------------------------------------- Net investment income $ 51,955,917 $ 102,110,196 - -------------------------------------------------------------------------------------------------------------------------- Net realized gain 81,113,165 1,447,067,738 - -------------------------------------------------------------------------------------------------------------------------- Net change in unrealized appreciation (1,449,782,777) 151,987,534 --------------------------------------- Net increase (decrease) in net assets resulting from operations (1,316,713,695) 1,701,165,468 - -------------------------------------------------------------------------------------------------------------------------- DIVIDENDS AND/OR DISTRIBUTIONS TO SHAREHOLDERS - -------------------------------------------------------------------------------------------------------------------------- Dividends from net investment income: Class A (85,015,229) (73,117,391) Class B (2,988,279) (984,972) Class C (3,918,974) (2,391,155) Class N (1,895,829) (1,498,558) Class Y (13,557,437) (10,050,408) --------------------------------------- (107,375,748) (88,042,484) - -------------------------------------------------------------------------------------------------------------------------- Distributions from net realized gain: Class A (950,507,888) (307,631,500) Class B (140,255,676) (56,774,032) Class C (137,226,755) (45,635,308) Class N (28,180,560) (8,621,612) Class Y (109,217,121) (28,797,341) --------------------------------------- (1,365,388,000) (447,459,793) - -------------------------------------------------------------------------------------------------------------------------- CAPITAL STOCK TRANSACTIONS - -------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net assets resulting from capital stock transactions: Class A 584,504,448 (477,905,838) Class B (31,022,966) (385,057,480) Class C 53,272,507 (95,608,923) Class N 16,381,800 8,020,928 Class Y 61,322,417 179,390,811 --------------------------------------- 684,458,206 (771,160,502) - -------------------------------------------------------------------------------------------------------------------------- NET ASSETS - -------------------------------------------------------------------------------------------------------------------------- Total increase (decrease) (2,105,019,237) 394,502,689 - -------------------------------------------------------------------------------------------------------------------------- Beginning of period 11,512,491,468 11,117,988,779 --------------------------------------- End of period (including accumulated net investment income of $19,617,496 and $75,037,327, respectively) $ 9,407,472,231 $ 11,512,491,468 ======================================= SEE ACCOMPANYING NOTES TO FINANCIAL STATEMENTS. 28 | OPPENHEIMER MAIN STREET FUND FINANCIAL HIGHLIGHTS - -------------------------------------------------------------------------------- SIX MONTHS ENDED FEBRUARY 29, 2008 YEAR ENDED AUGUST 31, CLASS A (UNAUDITED) 2007 2006 2005 2004 2003 - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ PER SHARE OPERATING DATA - ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, beginning of period $ 43.21 $ 39.12 $ 36.18 $ 32.78 $ 29.62 $ 27.90 - ------------------------------------------------------------------------------------------------------------------------------------ Income (loss) from investment operations: Net investment income .21 1 .42 1 .35 1 .47 1 .26 .22 Net realized and unrealized gain (loss) (4.77) 5.64 2.96 3.34 3.10 1.69 --------------------------------------------------------------------------------------------------------- Total from investment operations ( 4.56) 6.06 3.31 3.81 3.36 1.91 - ------------------------------------------------------------------------------------------------------------------------------------ Dividends and/or distributions to shareholders: Dividends from net investment income (.47) (.38) (.37) (.41) (.20) (.19) Distributions from net realized gain (5.23) (1.59) -- -- -- -- --------------------------------------------------------------------------------------------------------- Total dividends and/or distributions to shareholders (5.70) (1.97) (.37) (.41) (.20) (.19) - ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 32.95 $ 43.21 $ 39.12 $ 36.18 $ 32.78 $ 29.62 ========================================================================================================= - ------------------------------------------------------------------------------------------------------------------------------------ TOTAL RETURN, AT NET ASSET VALUE 2 (11.90)% 15.90% 9.19% 11.68% 11.37% 6.93% - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ RATIOS/SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------------------------ Net assets, end of period (in thousands) $ 6,644,582 $ 8,015,873 $ 7,680,186 $ 7,810,714 $ 7,384,256 $ 7,033,312 - ------------------------------------------------------------------------------------------------------------------------------------ Average net assets (in thousands) $ 7,609,342 $ 8,183,830 $ 7,845,096 $ 7,759,230 $ 7,521,103 $ 6,310,359 - ------------------------------------------------------------------------------------------------------------------------------------ Ratios to average net assets: 3 Net investment income 1.08% 1.00% 0.93% 1.36% 0.75% 0.87% Total expenses 0.91% 4,5,6 0.89% 4,5,6 0.92% 5 0.92% 5 0.93% 5,7 0.97% 5 - ------------------------------------------------------------------------------------------------------------------------------------ Portfolio turnover rate 55% 104% 84% 79% 76% 94% 1. Per share amounts calculated based on the average shares outstanding during the period. 2. Assumes an investment on the business day before the first day of the fiscal period, with all dividends and distributions reinvested in additional shares on the reinvestment date, and redemption at the net asset value calculated on the last business day of the fiscal period. Sales charges are not reflected in the total returns. Total returns are not annualized for periods less than one full year. Returns do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. 3. Annualized for periods less than one full year. 4. Total expenses including indirect expenses from affiliated fund were as follows: Six Months Ended February 29, 2008 0.91% Year Ended August 31, 2007 0.89% 5. Reduction to custodian expenses less than 0.005%. 6. Voluntary waiver or reimbursement of indirect management fees less than 0.005%. 7. Voluntary waiver of transfer agent fees less than 0.005%. SEE ACCOMPANYING NOTES TO FINANCIAL STATEMENTS. 29 | OPPENHEIMER MAIN STREET FUND FINANCIAL HIGHLIGHTS Continued - -------------------------------------------------------------------------------- SIX MONTHS ENDED FEBRUARY 29, 2008 YEAR ENDED AUGUST 31, CLASS B (UNAUDITED) 2007 2006 2005 2004 2003 - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ PER SHARE OPERATING DATA - ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, beginning of period $ 41.83 $ 37.87 $ 34.99 $ 31.67 $ 28.68 $ 27.04 - ------------------------------------------------------------------------------------------------------------------------------------ Income (loss) from investment operations: Net investment income (loss) .06 1 .10 1 .05 1 .20 1 (.21) (.13) Net realized and unrealized gain (loss) (4.62) 5.48 2.86 3.21 3.20 1.77 ---------------------------------------------------------------------------------------------------- Total from investment operations (4.56) 5.58 2.91 3.41 2.99 1.64 - ------------------------------------------------------------------------------------------------------------------------------------ Dividends and/or distributions to shareholders: Dividends from net investment income (.11) (.03) (.03) (.09) -- -- Distributions from net realized gain (5.23) (1.59) -- -- -- -- ---------------------------------------------------------------------------------------------------- Total dividends and/or distributions to shareholders (5.34) (1.62) (.03) (.09) -- -- - ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 31.93 $ 41.83 $ 37.87 $ 34.99 $ 31.67 $ 28.68 ==================================================================================================== - ------------------------------------------------------------------------------------------------------------------------------------ TOTAL RETURN, AT NET ASSET VALUE 2 (12.21)% 15.06% 8.32% 10.79% 10.43% 6.06% - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ RATIOS/SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------------------------ Net assets, end of period (in thousands) $ 902,774 $1,206,240 $1,453,679 $1,968,829 $2,558,206 $ 2,941,765 - ------------------------------------------------------------------------------------------------------------------------------------ Average net assets (in thousands) $1,079,721 $1,354,135 $1,685,648 $2,295,269 $2,884,434 $ 2,964,666 - ------------------------------------------------------------------------------------------------------------------------------------ Ratios to average net assets: 3 Net investment income (loss) 0.33% 0.24% 0.13% 0.59% (0.10)% 0.04% Total expenses 1.66% 4,5,6 1.65% 4,5,6 1.71% 4 1.72% 4 1.78% 4,7 1.81% 4 - ------------------------------------------------------------------------------------------------------------------------------------ Portfolio turnover rate 55% 104% 84% 79% 76% 94% 1. Per share amounts calculated based on the average shares outstanding during the period. 2. Assumes an investment on the business day before the first day of the fiscal period, with all dividends and distributions reinvested in additional shares on the reinvestment date, and redemption at the net asset value calculated on the last business day of the fiscal period. Sales charges are not reflected in the total returns. Total returns are not annualized for periods less than one full year. Returns do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. 3. Annualized for periods less than one full year. 4. Reduction to custodian expenses less than 0.005%. 5. Total expenses including indirect expenses from affiliated fund were as follows: Six Months Ended February 29, 2008 1.66% Year Ended August 31, 2007 1.65% 6. Voluntary waiver or reimbursement of indirect management fees less than 0.005%. 7. Voluntary waiver of transfer agent fees less than 0.005%. SEE ACCOMPANYING NOTES TO FINANCIAL STATEMENTS. 30 | OPPENHEIMER MAIN STREET FUND SIX MONTHS ENDED FEBRUARY 29, 2008 YEAR ENDED AUGUST 31, CLASS C (UNAUDITED) 2007 2006 2005 2004 2003 - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ PER SHARE OPERATING DATA - ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, beginning of period $ 41.71 $ 37.81 $ 34.98 $ 31.71 $ 28.69 $ 27.03 - ------------------------------------------------------------------------------------------------------------------------------------ Income (loss) from investment operations: Net investment income (loss) .061 .111 .071 .211 (.03) -- Net realized and unrealized gain (loss) (4.60) 5.46 2.85 3.22 3.05 1.66 ----------------------------------------------------------------------------------------------------------- Total from investment operations (4.54) 5.57 2.92 3.43 3.02 1.66 - ------------------------------------------------------------------------------------------------------------------------------------ Dividends and/or distributions to shareholders: Dividends from net investment income (.15) (.08) (.09) (.16) -- -- Distributions from net realized gain (5.23) (1.59) -- -- -- -- ----------------------------------------------------------------------------------------------------------- Total dividends and/or distributions to shareholders (5.38) (1.67) (.09) (.16) -- -- - ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 31.79 $ 41.71 $ 37.81 $ 34.98 $ 31.71 $ 28.69 =========================================================================================================== - ------------------------------------------------------------------------------------------------------------------------------------ TOTAL RETURN, AT NET ASSET VALUE 2 (12.21)% 15.09% 8.36% 10.83% 10.53% 6.14% - ------------------------------------------------------------------------------------------------------------------------------------ RATIOS/SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------------------------ Net assets, end of period (in thousands) $ 907,682 $ 1,126,093 $ 1,107,962 $ 1,206,335 $ 1,241,930 $ 1,188,826 - ------------------------------------------------------------------------------------------------------------------------------------ Average net assets (in thousands) $ 1,055,429 $ 1,155,527 $ 1,163,337 $ 1,250,845 $ 1,278,659 $ 1,111,131 - ------------------------------------------------------------------------------------------------------------------------------------ Ratios to average net assets:3 Net investment income (loss) 0.34% 0.26% 0.18% 0.62% (0.01)% 0.09% Total expenses 1.65% 4,5,6 1.64% 4,5,6 1.67% 4 1.67% 4 1.70% 4,7 1.74% 4 - ------------------------------------------------------------------------------------------------------------------------------------ Portfolio turnover rate 55% 104% 84% 79% 76% 94% 1. Per share amounts calculated based on the average shares outstanding during the period. 2. Assumes an investment on the business day before the first day of the fiscal period, with all dividends and distributions reinvested in additional shares on the reinvestment date, and redemption at the net asset value calculated on the last business day of the fiscal period. Sales charges are not reflected in the total returns. Total returns are not annualized for periods less than one full year. Returns do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. 3. Annualized for periods less than one full year. 4. Reduction to custodian expenses less than 0.005%. 5. Total expenses including indirect expenses from affiliated fund were as follows: Six Months Ended February 29, 2008 1.65% Year Ended August 31, 2007 1.64% 6. Voluntary waiver or reimbursement of indirect management fees less than 0.005%. 7. Voluntary waiver of transfer agent fees less than 0.005%. SEE ACCOMPANYING NOTES TO FINANCIAL STATEMENTS. 31 | OPPENHEIMER MAIN STREET FUND FINANCIAL HIGHLIGHTS Continued - ------------------------------------------------------------------------------ SIX MONTHS ENDED FEBRUARY 29, 2008 YEAR ENDED AUGUST 31, CLASS N (UNAUDITED) 2007 2006 2005 2004 2003 - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ PER SHARE OPERATING DATA - ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, beginning of period $ 42.59 $ 38.59 $ 35.71 $ 32.39 $ 29.33 $ 27.72 - ------------------------------------------------------------------------------------------------------------------------------------ Income (loss) from investment operations: Net investment income .16 1 .30 1 .24 1 .35 1 .15 .20 Net realized and unrealized gain (loss) (4.71) 5.57 2.92 3.30 3.05 1.65 ----------------------------------------------------------------------------------- Total from investment operations (4.55) 5.87 3.16 3.65 3.20 1.85 - ------------------------------------------------------------------------------------------------------------------------------------ Dividends and/or distributions to shareholders: Dividends from net investment income (.35) (.28) (.28) (.33) (.14) (.24) Distributions from net realized gain (5.23) (1.59) -- -- -- -- ----------------------------------------------------------------------------------- Total dividends and/or distributions to shareholders (5.58) (1.87) (.28) (.33) (.14) (.24) - ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 32.46 $ 42.59 $ 38.59 $ 35.71 $ 32.39 $ 29.33 =================================================================================== - ------------------------------------------------------------------------------------------------------------------------------------ TOTAL RETURN, AT NET ASSET VALUE 2 (12.01)% 15.59% 8.87% 11.30% 10.93% 6.78% - ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ RATIOS/SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------------------------ Net assets, end of period (in thousands) $ 196,899 $ 238,068 $ 207,339 $177,463 $ 150,955 $ 79,188 - ------------------------------------------------------------------------------------------------------------------------------------ Average net assets (in thousands) $ 224,393 $ 232,421 $ 194,639 $168,866 $ 122,478 $ 60,950 - ------------------------------------------------------------------------------------------------------------------------------------ Ratios to average net assets: 3 Net investment income 0.82% 0.73% 0.63% 1.02% 0.38% 0.65% Total expenses 1.16% 4 1.17% 4 1.22% 1.26% 1.31% 1.23% Expenses after payments, waivers and/or reimbursements and reduction to custodian expenses 1.16% 1.17% 1.22% 1.26% 1.31% 1.18% - ------------------------------------------------------------------------------------------------------------------------------------ Portfolio turnover rate 55% 104% 84% 79% 76% 94% 1. Per share amounts calculated based on the average shares outstanding during the period. 2. Assumes an investment on the business day before the first day of the fiscal period, with all dividends and distributions reinvested in additional shares on the reinvestment date, and redemption at the net asset value calculated on the last business day of the fiscal period. Sales charges are not reflected in the total returns. Total returns are not annualized for periods less than one full year. Returns do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. 3. Annualized for periods less than one full year. 4. Total expenses including indirect expenses from affiliated fund were as follows: Six Months Ended February 29, 2008 1.16% Year Ended August 31, 2007 1.17% SEE ACCOMPANYING NOTES TO FINANCIAL STATEMENTS. 32 | OPPENHEIMER MAIN STREET FUND SIX MONTHS ENDED FEBRUARY 29, 2008 YEAR ENDED AUGUST 31, CLASS Y (UNAUDITED) 2007 2006 2005 2004 2003 - ------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------ PER SHARE OPERATING DATA - ------------------------------------------------------------------------------------------------------------------------ Net asset value, beginning of period $ 43.45 $ 39.33 $ 36.38 $ 32.93 $ 29.75 $ 28.02 - ------------------------------------------------------------------------------------------------------------------------ Income (loss) from investment operations: Net investment income .291 .601 .521 .641 .34 .11 Net realized and unrealized gain (loss) (4.79) 5.67 2.96 3.34 3.13 1.86 --------------------------------------------------------------------- Total from investment operations (4.50) 6.27 3.48 3.98 3.47 1.97 - ------------------------------------------------------------------------------------------------------------------------ Dividends and/or distributions to shareholders: Dividends from net investment income (.65) (.56) (.53) (.53) (.29) (.24) Distributions from net realized gain (5.23) (1.59) -- -- -- -- --------------------------------------------------------------------- Total dividends and/or distributions to shareholders (5.88) (2.15) (.53) (.53) (.29) (.24) - ------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 33.07 $ 43.45 $ 39.33 $ 36.38 $ 32.93 $ 29.75 ===================================================================== - ------------------------------------------------------------------------------------------------------------------------ TOTAL RETURN, AT NET ASSET VALUE 2 (11.72)% 16.40% 9.63% 12.15% 11.69% 7.11% - ------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------ RATIOS/SUPPLEMENTAL DATA - ------------------------------------------------------------------------------------------------------------------------ Net assets, end of period (in thousands) $755,535 $926,217 $668,823 $483,532 $570,991 $441,460 - ------------------------------------------------------------------------------------------------------------------------ Average net assets (in thousands) $890,557 $844,472 $594,018 $496,349 $558,130 $242,029 - ------------------------------------------------------------------------------------------------------------------------ Ratios to average net assets: 3 Net investment income 1.49% 1.42% 1.38% 1.82% 1.07% 1.01% Total expenses 0.49% 4 0.48% 4 0.49% 0.53% 0.60% 0.87% Expenses after payments, waivers and/or reimbursements and reduction to custodian expenses 0.49% 0.48% 0.49% 0.53% 0.60% 0.83% - ------------------------------------------------------------------------------------------------------------------------ Portfolio turnover rate 55% 104% 84% 79% 76% 94% 1. Per share amounts calculated based on the average shares outstanding during the period. 2. Assumes an investment on the business day before the first day of the fiscal period, with all dividends and distributions reinvested in additional shares on the reinvestment date, and redemption at the net asset value calculated on the last business day of the fiscal period. Sales charges are not reflected in the total returns. Total returns are not annualized for periods less than one full year. Returns do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. 3. Annualized for periods less than one full year. 4. Total expenses including indirect expenses from affiliated fund were as follows: Six Months Ended February 29, 2008 0.49% Year Ended August 31, 2007 0.48% SEE ACCOMPANYING NOTES TO FINANCIAL STATEMENTS. 33 | OPPENHEIMER MAIN STREET FUND NOTES TO FINANCIAL STATEMENTS Unaudited - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- 1. SIGNIFICANT ACCOUNTING POLICIES Oppenheimer Main Street Fund (the "Fund") is a separate series of Oppenheimer Main Street Funds, Inc., an open-end management investment company registered under the Investment Company Act of 1940, as amended. The Fund's investment objective is to seek a high total return. The Fund's investment adviser is OppenheimerFunds, Inc. (the "Manager"). The Fund offers Class A, Class B, Class C, Class N and Class Y shares. Class A shares are sold at their offering price, which is normally net asset value plus a front-end sales charge. Class B, Class C and Class N shares are sold without a front-end sales charge but may be subject to a contingent deferred sales charge ("CDSC"). Class N shares are sold only through retirement plans. Retirement plans that offer Class N shares may impose charges on those accounts. Class Y shares are sold to certain institutional investors without either a front-end sales charge or a CDSC, however, the institutional investor may impose charges on those accounts. All classes of shares have identical rights and voting privileges with respect to the Fund in general and exclusive voting rights on matters that affect that class alone. Earnings, net assets and net asset value per share may differ due to each class having its own expenses, such as transfer and shareholder servicing agent fees and shareholder communications, directly attributable to that class. Class A, B, C and N have separate distribution and/or service plans. No such plan has been adopted for Class Y shares. Class B shares will automatically convert to Class A shares 72 months after the date of purchase. The following is a summary of significant accounting policies consistently followed by the Fund. - -------------------------------------------------------------------------------- SECURITIES VALUATION. The Fund calculates the net asset value of its shares as of the close of the New York Stock Exchange (the "Exchange"), normally 4:00 P.M. Eastern time, on each day the Exchange is open for trading. Securities may be valued primarily using dealer-supplied valuations or a portfolio pricing service authorized by the Board of Directors. Securities traded on a registered U.S. securities exchange are valued based on the last sale price of the security traded on that exchange prior to the time when the Fund's assets are valued. Securities whose principal exchange is NASDAQ(R) are valued based on the closing price reported by NASDAQ prior to the time when the Fund's assets are valued. In the absence of a sale, the security is valued at the last sale price on the prior trading day, if it is within the spread of the closing "bid" and "asked" prices, and if not, at the closing bid price. Securities traded on foreign exchanges are valued based on the last sale price on the principal exchange on which the security is traded, as identified by the portfolio pricing service, prior to the time when the Fund's assets are valued. In the absence of a sale, the security is valued at the official closing price on the principal exchange. Corporate, government and municipal debt instruments having a remaining maturity in excess of sixty days and all mortgage-backed securities, collateralized mortgage obligations and other asset-backed securities will be valued at the mean between the "bid" and "asked" prices. Securities for which market quotations are not readily available are valued at their fair value. Securities whose values have been materially affected 34 | OPPENHEIMER MAIN STREET FUND by what the Manager identifies as a significant event occurring before the Fund's assets are valued but after the close of their respective exchanges will be fair valued. Fair value is determined in good faith using consistently applied procedures under the supervision of the Board of Directors. Shares of a registered investment company that are not traded on an exchange are valued at the acquired investment company's net asset value per share. "Money market-type" debt instruments with remaining maturities of sixty days or less are valued at cost adjusted by the amortization of discount or premium to maturity (amortized cost), which approximates market value. - -------------------------------------------------------------------------------- INVESTMENT IN OPPENHEIMER INSTITUTIONAL MONEY MARKET FUND. The Fund is permitted to invest daily available cash balances in an affiliated money market fund. The Fund may invest the available cash in Class E shares of Oppenheimer Institutional Money Market Fund ("IMMF") to seek current income while preserving liquidity. IMMF is a registered open-end management investment company, regulated as a money market fund under the Investment Company Act of 1940, as amended. The Manager is also the investment adviser of IMMF. The Fund's investment in IMMF is included in the Statement of Investments. As a shareholder, the Fund is subject to its proportional share of IMMF's Class E expenses, including its management fee. The Manager will waive fees and/or reimburse Fund expenses in an amount equal to the indirect management fees incurred through the Fund's investment in IMMF. - -------------------------------------------------------------------------------- JOINT REPURCHASE AGREEMENTS. Pursuant to an Exemptive Order issued by the Securities and Exchange Commission, the Fund, along with other affiliated funds advised by the Manager, may transfer uninvested cash balances into joint trading accounts on a daily basis. These balances are invested in one or more repurchase agreements. Securities pledged as collateral for repurchase agreements are held by a custodian bank until the agreements mature. Each agreement requires that the market value of the collateral be sufficient to cover payments of interest and principal. If the seller of the agreement defaults and the value of the collateral declines, or if the seller enters an insolvency proceeding, realization of the value of the collateral by the Fund may be delayed or limited. - -------------------------------------------------------------------------------- ALLOCATION OF INCOME, EXPENSES, GAINS AND LOSSES. Income, expenses (other than those attributable to a specific class), gains and losses are allocated on a daily basis to each class of shares based upon the relative proportion of net assets represented by such class. Operating expenses directly attributable to a specific class are charged against the operations of that class. - -------------------------------------------------------------------------------- FEDERAL TAXES. The Fund intends to comply with provisions of the Internal Revenue Code applicable to regulated investment companies and to distribute substantially all of its investment company taxable income, including any net realized gain on investments not offset by capital loss carryforwards, if any, to shareholders. Therefore, no federal income or excise tax provision is required. The Fund files income tax returns in U.S. federal and applicable state jurisdictions. The statute of limitations on the Fund's tax return filings generally remain open for the three preceding fiscal reporting period ends. 35 | OPPENHEIMER MAIN STREET FUND NOTES TO FINANCIAL STATEMENTS Unaudited / Continued - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- 1. SIGNIFICANT ACCOUNTING POLICIES Continued Net investment income (loss) and net realized gain (loss) may differ for financial statement and tax purposes. The character of dividends and distributions made during the fiscal year from net investment income or net realized gains may differ from their ultimate characterization for federal income tax purposes. Also, due to timing of dividends and distributions, the fiscal year in which amounts are distributed may differ from the fiscal year in which the income or net realized gain was recorded by the Fund. As of February 29, 2008, the Fund had available for federal income tax purposes an estimated capital loss carryforward of zero. This estimated capital loss carryforward represents carryforward as of the end of the last fiscal year, increased for losses deferred under tax accounting rules to the current fiscal year and is increased or decreased by capital losses or gains realized in the first six months of the current fiscal year. During the six months ended February 29, 2008, it is estimated that the Fund will utilize $23,186 of capital loss carryforward to offset realized capital gains. During the fiscal year ended August 31, 2007, the Fund utilized $489,935 of capital loss carryforward to offset capital gains realized in that fiscal year. As of August 31, 2007, the Fund had available for federal income tax purposes post-October foreign currency losses of $23,186. The approximate aggregate cost of securities and other investments and the composition of unrealized appreciation and depreciation of securities and other investments for federal income tax purposes as of February 29, 2008 are noted below. The primary difference between book and tax appreciation or depreciation of securities and other investments, if applicable, is attributable to the tax deferral of losses. Federal tax cost of securities $ 9,186,746,307 ================ Gross unrealized appreciation $ 1,353,336,898 Gross unrealized depreciation (568,079,566) ---------------- Net unrealized appreciation $ 785,257,332 ================ - -------------------------------------------------------------------------------- DIRECTORS' COMPENSATION. The Board of Directors has adopted a compensation deferral plan for independent directors that enables directors to elect to defer receipt of all or a portion of the annual compensation they are entitled to receive from the Fund. For purposes of determining the amount owed to the Director under the plan, deferred amounts are treated as though equal dollar amounts had been invested in shares of the Fund or in other Oppenheimer funds selected by the Director. The Fund purchases shares of the funds selected for deferral by the Director in amounts equal to his or her deemed investment, resulting in a Fund asset equal to the deferred compensation liability. Such assets are included as a component of "Other" within the asset section of the Statement of Assets and Liabilities. Deferral of directors' fees under the plan will not affect the net assets of the Fund, and will not materially affect the Fund's assets, liabilities or net investment income per share. Amounts will be deferred until distributed in accordance to the compensation deferral plan. 36 | OPPENHEIMER MAIN STREET FUND - -------------------------------------------------------------------------------- DIVIDENDS AND DISTRIBUTIONS TO SHAREHOLDERS. Dividends and distributions to shareholders, which are determined in accordance with income tax regulations and may differ from U.S. generally accepted accounting principles, are recorded on the ex-dividend date. Income and capital gain distributions, if any, are declared and paid annually or at other times as deemed necessary by the Manager. - -------------------------------------------------------------------------------- INVESTMENT INCOME. Dividend income is recorded on the ex-dividend date or upon ex-dividend notification in the case of certain foreign dividends where the ex-dividend date may have passed. Non-cash dividends included in dividend income, if any, are recorded at the fair market value of the securities received. Interest income is recognized on an accrual basis. Discount and premium, which are included in interest income on the Statement of Operations, are amortized or accreted daily. - -------------------------------------------------------------------------------- CUSTODIAN FEES. "Custodian fees and expenses" in the Statement of Operations may include interest expense incurred by the Fund on any cash overdrafts of its custodian account during the period. Such cash overdrafts may result from the effects of failed trades in portfolio securities and from cash outflows resulting from unanticipated shareholder redemption activity. The Fund pays interest to its custodian on such cash overdrafts, to the extent they are not offset by positive cash balances maintained by the Fund, at a rate equal to the Federal Funds Rate plus 0.50%. The "Reduction to custodian expenses" line item, if applicable, represents earnings on cash balances maintained by the Fund during the period. Such interest expense and other custodian fees may be paid with these earnings. - -------------------------------------------------------------------------------- SECURITY TRANSACTIONS. Security transactions are recorded on the trade date. Realized gains and losses on securities sold are determined on the basis of identified cost. - -------------------------------------------------------------------------------- INDEMNIFICATIONS. The Fund's organizational documents provide current and former directors and officers with a limited indemnification against liabilities arising in connection with the performance of their duties to the Fund. In the normal course of business, the Fund may also enter into contracts that provide general indemnifications. The Fund's maximum exposure under these arrangements is unknown as this would be dependent on future claims that may be made against the Fund. The risk of material loss from such claims is considered remote. - -------------------------------------------------------------------------------- OTHER. The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America 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 increases and decreases in net assets from operations during the reporting period. Actual results could differ from those estimates. 37 | OPPENHEIMER MAIN STREET FUND NOTES TO FINANCIAL STATEMENTS Unaudited / Continued - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- 2. SHARES OF CAPITAL STOCK The Fund has authorized 840 million shares of $.01 par value capital stock. Transactions in shares of capital stock were as follows: SIX MONTHS ENDED FEBRUARY 29, 2008 YEAR ENDED AUGUST 31, 2007 SHARES AMOUNT SHARES AMOUNT - ------------------------------------------------------------------------------------------------ CLASS A Sold 11,228,474 $ 449,382,400 20,628,969 $ 853,510,126 Dividends and/or distributions reinvested 26,435,944 969,164,618 8,913,226 355,994,212 Redeemed (21,527,701) (834,042,570) (40,383,161) (1,687,410,176) --------------------------------------------------------------- Net increase (decrease) 16,136,717 $ 584,504,448 (10,840,966) $ (477,905,838) =============================================================== - ------------------------------------------------------------------------------------------------ CLASS B Sold 1,311,588 $ 48,982,229 3,060,604 $ 123,359,939 Dividends and/or distributions reinvested 3,884,990 138,227,863 1,421,750 55,277,609 Redeemed (5,756,869) (218,233,058) (14,028,498) (563,695,028) --------------------------------------------------------------- Net decrease (560,291) $ (31,022,966) (9,546,144) $ (385,057,480) =============================================================== - ------------------------------------------------------------------------------------------------ CLASS C Sold 1,194,912 $ 44,455,266 2,308,996 $ 92,663,359 Dividends and/or distributions reinvested 3,503,853 124,106,488 1,087,129 42,137,114 Redeemed (3,142,883) (115,289,247) (5,696,274) (230,409,396) --------------------------------------------------------------- Net increase (decrease) 1,555,882 $ 53,272,507 (2,300,149) $ (95,608,923) =============================================================== - ------------------------------------------------------------------------------------------------ CLASS N Sold 744,971 $ 28,215,889 1,607,897 $ 65,689,791 Dividends and/or distributions reinvested 805,032 29,085,424 249,507 9,840,578 Redeemed (1,074,427) (40,919,513) (1,640,570) (67,509,441) --------------------------------------------------------------- Net increase 475,576 $ 16,381,800 216,834 $ 8,020,928 =============================================================== - ------------------------------------------------------------------------------------------------ CLASS Y Sold 4,903,773 $ 200,869,475 9,204,931 $ 387,484,627 Dividends and/or distributions reinvested 3,208,722 117,920,549 944,172 37,804,657 Redeemed (6,584,694) (257,467,607) (5,837,620) (245,898,473) --------------------------------------------------------------- Net increase 1,527,801 $ 61,322,417 4,311,483 $ 179,390,811 =============================================================== 38 | OPPENHEIMER MAIN STREET FUND - -------------------------------------------------------------------------------- 3. PURCHASES AND SALES OF SECURITIES The aggregate cost of purchases and proceeds from sales of securities, other than short-term obligations and investments in IMMF, for the six months ended February 29, 2008, were as follows: PURCHASES SALES - --------------------------------------------------------- Investment securities $ 5,930,966,438 $ 6,685,833,929 - -------------------------------------------------------------------------------- 4. FEES AND OTHER TRANSACTIONS WITH AFFILIATES MANAGEMENT FEES. Under the investment advisory agreement, the Fund pays the Manager a management fee based on the daily net assets of the Fund at an annual rate as shown in the following table: FEE SCHEDULE ---------------------------- Up to $200 million 0.65% Next $150 million 0.60 Next $150 million 0.55 Over $500 million 0.45 - -------------------------------------------------------------------------------- ADMINISTRATION SERVICE FEES. The Fund pays the Manager a fee of $1,500 per year for preparing and filing the Fund's tax returns. - -------------------------------------------------------------------------------- TRANSFER AGENT FEES. OppenheimerFunds Services ("OFS"), a division of the Manager, acts as the transfer and shareholder servicing agent for the Fund. The Fund pays OFS a per account fee. For the six months ended February 29, 2008, the Fund paid $9,070,511 to OFS for services to the Fund. Additionally, Class Y shares are subject to minimum fees of $10,000 annually for assets of $10 million or more. The Class Y shares are subject to the minimum fees in the event that the per account fee does not equal or exceed the applicable minimum fees. OFS may voluntarily waive the minimum fees. - -------------------------------------------------------------------------------- DISTRIBUTION AND SERVICE PLAN (12B-1) FEES. Under its General Distributor's Agreement with the Fund, OppenheimerFunds Distributor, Inc. (the "Distributor") acts as the Fund's principal underwriter in the continuous public offering of the Fund's classes of shares. - -------------------------------------------------------------------------------- SERVICE PLAN FOR CLASS A SHARES. The Fund has adopted a Service Plan (the "Plan") for Class A shares under Rule 12b-1 of the Investment Company Act of 1940. Under the Plan, the Fund reimburses the Distributor for a portion of its costs incurred for services provided to accounts that hold Class A shares. Reimbursement is made periodically at an annual rate of up to 0.25% of the average annual net assets of Class A shares of the Fund. The Distributor currently uses all of those fees to pay dealers, brokers, banks and other financial institutions periodically for providing personal service and maintenance of accounts of their customers that hold Class A shares. Any unreimbursed expenses the Distributor incurs with respect to Class A shares in any fiscal year cannot be recovered in subsequent periods. Fees incurred by the Fund under the Plan are detailed in the Statement of Operations. 39 | OPPENHEIMER MAIN STREET FUND NOTES TO FINANCIAL STATEMENTS Unaudited / Continued - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- 4. FEES AND OTHER TRANSACTIONS WITH AFFILIATES Continued DISTRIBUTION AND SERVICE PLANS FOR CLASS B, CLASS C AND CLASS N SHARES. The Fund has adopted Distribution and Service Plans (the "Plans") for Class B, Class C and Class N shares under Rule 12b-1 of the Investment Company Act of 1940 to compensate the Distributor for its services in connection with the distribution of those shares and servicing accounts. Under the Plans, the Fund pays the Distributor an annual asset-based sales charge of 0.75% on Class B and Class C shares and 0.25% on Class N shares. The Distributor also receives a service fee of 0.25% per year under each plan. If either the Class B, Class C or Class N plan is terminated by the Fund or by the shareholders of a class, the Board of Directors and its independent directors must determine whether the Distributor shall be entitled to payment from the Fund of all or a portion of the service fee and/or asset-based sales charge in respect to shares sold prior to the effective date of such termination. The Distributor's aggregate uncompensated expenses under the Plans at December 31, 2007 for Class B, Class C and Class N shares were $16,887,485, $38,299,606 and $3,792,288, respectively. Fees incurred by the Fund under the Plans are detailed in the Statement of Operations. - -------------------------------------------------------------------------------- SALES CHARGES. Front-end sales charges and contingent deferred sales charges ("CDSC") do not represent expenses of the Fund. They are deducted from the proceeds of sales of Fund shares prior to investment or from redemption proceeds prior to remittance, as applicable. The sales charges retained by the Distributor from the sale of shares and the CDSC retained by the Distributor on the redemption of shares is shown in the following table for the period indicated. CLASS A CLASS B CLASS C CLASS N CLASS A CONTINGENT CONTINGENT CONTINGENT CONTINGENT FRONT-END DEFERRED DEFERRED DEFERRED DEFERRED SALES CHARGES SALES CHARGES SALES CHARGES SALES CHARGES SALES CHARGES RETAINED BY RETAINED BY RETAINED BY RETAINED BY RETAINED BY SIX MONTHS ENDED DISTRIBUTOR DISTRIBUTOR DISTRIBUTOR DISTRIBUTOR DISTRIBUTOR - ------------------------------------------------------------------------------------------------- February 29, 2008 $ 811,213 $ 5,231 $ 856,370 $ 20,039 $ 3,976 - ------------------------------------------------------------------------------------------------- WAIVERS AND REIMBURSEMENTS OF EXPENSES. OFS has voluntarily agreed to limit transfer and shareholder servicing agent fees for all classes to 0.35% of average annual net assets per class. This undertaking may be amended or withdrawn at any time. The Manager will waive fees and/or reimburse Fund expenses in an amount equal to the indirect management fees incurred through the Fund's investment in IMMF. During the six months ended February 29, 2008, the Manager waived $22,215 for IMMF management fees. - -------------------------------------------------------------------------------- 5. ILLIQUID SECURITIES As of February 29, 2008, investments in securities included issues that are illiquid. Investments may be illiquid because they do not have an active trading market, making it difficult to value them or dispose of them promptly at an acceptable price. The Fund will 40 | OPPENHEIMER MAIN STREET FUND not invest more than 10% of its net assets (determined at the time of purchase and reviewed periodically) in illiquid securities. Securities that are illiquid are marked with an applicable footnote on the Statement of Investments. - -------------------------------------------------------------------------------- 6. SECURITIES LENDING The Fund lends portfolio securities from time to time in order to earn additional income in the form of fees or interest on securities received as collateral or the investment of any cash received as collateral. The loans are secured by collateral (either securities, letters of credit, or cash) in an amount not less than 100% of the market value of the loaned securities during the period of the loan. The market value of the loaned securities is determined at the close of each business day and any additional required collateral is delivered to the Fund on the next business day. If the borrower defaults on its obligation to return the securities loaned because of insolvency or other reasons, the Fund could experience delays and cost in recovering the securities loaned or in gaining access to the collateral. The Fund continues to receive the economic benefit of interest or dividends paid on the securities loaned in the form of a substitute payment received from the borrower and recognizes the gain or loss in the fair value of the securities loaned that may occur during the term of the loan. The Fund has the right under the lending agreement to recover the securities from the borrower on demand. As of February 29, 2008, the Fund had on loan securities valued at $524,178,455. Collateral of $558,478,892 was received for the loans, all of which was received in cash and subsequently invested in approved instruments. - -------------------------------------------------------------------------------- 7. RECENT ACCOUNTING PRONOUNCEMENT In September 2006, Financial Accounting Standards Board ("FASB") issued Statement of Financial Accounting Standards ("SFAS") No. 157, FAIR VALUE MEASUREMENTS. This standard establishes a single authoritative definition of fair value, sets out a framework for measuring fair value and expands disclosures about fair value measurements. SFAS No. 157 applies to fair value measurements already required or permitted by existing standards. SFAS No. 157 is effective for financial statements issued for fiscal years beginning after November 15, 2007, and interim periods within those fiscal years. As of February 29, 2008, the Manager does not believe the adoption of SFAS No. 157 will materially impact the financial statement amounts; however, additional disclosures may be required about the inputs used to develop the measurements and the effect of certain of the measurements on changes in net assets for the period. 41 | OPPENHEIMER MAIN STREET FUND PORTFOLIO PROXY VOTING POLICIES AND PROCEDURES; UPDATES TO STATEMENTS OF INVESTMENTS Unaudited - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- The Fund has adopted Portfolio Proxy Voting Policies and Procedures under which the Fund votes proxies relating to securities ("portfolio proxies") held by the Fund. A description of the Fund's Portfolio Proxy Voting Policies and Procedures is available (i) without charge, upon request, by calling the Fund toll-free at 1.800.525.7048, (ii) on the Fund's website at www.oppenheimerfunds.com, and (iii) on the SEC's website at www.sec.gov. In addition, the Fund is required to file Form N-PX, with its complete proxy voting record for the 12 months ended June 30th, no later than August 31st of each year. The Fund's Form N-PX filing is available (i) without charge, upon request, by calling the Fund toll-free at 1.800.525.7048, and (ii) on the SEC's website at WWW.SEC.GOV. The Fund files its complete schedule of portfolio holdings with the SEC for the first quarter and the third quarter of each fiscal year on Form N-Q. The Fund's Form N-Q filings are available on the SEC's website at http://www.sec.gov. Those forms may be reviewed and copied at the SEC's Public Reference Room in Washington, D.C. Information on the operation of the Public Reference Room may be obtained by calling 1-800-SEC-0330. 42 | OPPENHEIMER MAIN STREET FUND ITEM 2. CODE OF ETHICS. Not applicable to semiannual reports. ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT. Not applicable to semiannual reports. ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. Not applicable to semiannual reports. ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS Not applicable. ITEM 6. SCHEDULE OF INVESTMENTS. Not applicable. ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES. Not applicable. ITEM 8. PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES. Not applicable. ITEM 10. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS. THE FUND'S GOVERNANCE COMMITTEE PROVISIONS WITH RESPECT TO NOMINATIONS OF DIRECTORS/TRUSTEES TO THE RESPECTIVE BOARDS 1. The Fund's Governance Committee (the "Committee") will evaluate potential Board candidates to assess their qualifications. The Committee shall have the authority, upon approval of the Board, to retain an executive search firm to assist in this effort. The Committee may consider recommendations by business and personal contacts of current Board members and by executive search firms which the Committee may engage from time to time and may also consider shareholder recommendations. The Committee may consider the advice and recommendation of the Funds' investment manager and its affiliates in making the selection. 2. The Committee shall screen candidates for Board membership. The Committee has not established specific qualifications that it believes must be met by a trustee nominee. In evaluating trustee nominees, the Committee considers, among other things, an individual's background, skills, and experience; whether the individual is an "interested person" as defined in the Investment Company Act of 1940; and whether the individual would be deemed an "audit committee financial expert" within the meaning of applicable SEC rules. The Committee also considers whether the individual's background, skills, and experience will complement the background, skills, and experience of other nominees and will contribute to the Board. There are no differences in the manner in which the Committee evaluates nominees for trustees based on whether the nominee is recommended by a shareholder. 3. The Committee may consider nominations from shareholders for the Board at such times as the Committee meets to consider new nominees for the Board. The Committee shall have the sole discretion to determine the candidates to present to the Board and, in such cases where required, to shareholders. Recommendations for trustee nominees should, at a minimum, be accompanied by the following: o the name, address, and business, educational, and/or other pertinent background of the person being recommended; o a statement concerning whether the person is an "interested person" as defined in the Investment Company Act of 1940; o any other information that the Funds would be required to include in a proxy statement concerning the person if he or she was nominated; and o the name and address of the person submitting the recommendation and, if that person is a shareholder, the period for which that person held Fund shares. The recommendation also can include any additional information which the person submitting it believes would assist the Committee in evaluating the recommendation. 4. Shareholders should note that a person who owns securities issued by Massachusetts Mutual Life Insurance Company (the parent company of the Funds' investment adviser) would be deemed an "interested person" under the Investment Company Act of 1940. In addition, certain other relationships with Massachusetts Mutual Life Insurance Company or its subsidiaries, with registered broker-dealers, or with the Funds' outside legal counsel may cause a person to be deemed an "interested person." 5. Before the Committee decides to nominate an individual as a trustee, Committee members and other directors customarily interview the individual in person. In addition, the individual customarily is asked to complete a detailed questionnaire which is designed to elicit information which must be disclosed under SEC and stock exchange rules and to determine whether the individual is subject to any statutory disqualification from serving as a trustee of a registered investment company. ITEM 11. CONTROLS AND PROCEDURES. Based on their evaluation of the registrant's disclosure controls and procedures (as defined in rule 30a-3(c) under the Investment Company Act of 1940 (17 CFR 270.30a-3(c)) as of 02/29/2008, the registrant's principal executive officer and principal financial officer found the registrant's disclosure controls and procedures to provide reasonable assurances that information required to be disclosed by the registrant in the reports that it files under the Securities Exchange Act of 1934 (a) is accumulated and communicated to registrant's management, including its principal executive officer and principal financial officer, to allow timely decisions regarding required disclosure, and (b) is recorded, processed, summarized and reported, within the time periods specified in the rules and forms adopted by the U.S. Securities and Exchange Commission. There have been no changes in the registrant's internal controls over financial reporting that occurred during the registrant's second fiscal quarter of the period covered by this report that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting. ITEM 12. EXHIBITS. (a) (1) Not applicable to semiannual reports. (2) Exhibits attached hereto. (3) Not applicable. (b) Exhibit attached hereto. 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. Oppenheimer Main Street Funds, Inc. By: /s/ John V. Murphy --------------------------- John V. Murphy Principal Executive Officer Date: 04/16/2008 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: /s/ John V. Murphy --------------------------- John V. Murphy Principal Executive Officer Date: 04/16/2008 By: /s/ Brian W. Wixted --------------------------- Brian W. Wixted Principal Financial Officer Date: 04/16/2008