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 811-5344 William Blair Funds (Exact name of registrant as specified in charter) 222 West Adams Street, Chicago, IL 60606 (Address of principal executive offices) (Zip Code) Marco Hanig, President William Blair Funds 222 West Adams Street, Chicago, IL 60606 (Name and address of agent for service) Registrant's telephone number, including area code: 312-236-1600 Date of fiscal year end: December 31 Date of reporting period: June 30, 2004 Form N-CSR is to be used by management investment companies to file reports with the Commission not later than 10 days after the transmission to stockholders of any report that is required to be transmitted to stockholders under Rule 30e-1 under the Investment Company Act of 1940 (17 CFR 270.30e-1). The Commission may use the information provided on Form N-CSR in its regulatory, disclosure review, inspection, and policymaking roles. A registrant is required to disclose the information specified by Form N-CSR, and the Commission will make this information public. A Registrant is not required to respond to the collection of information contained in Form N-CSR unless the form displays a currently valid Office of Management and Budget ("OMB") control number. Please direct comments concerning the accuracy of the information collection burden estimates and any suggestions for reducing the burden to Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. (ss) 3507. Item 1. June 30, 2004 Semi-Annual Reports transmitted to shareholders. [LOGO APPEARS HERE] WILLIAM BLAIR FUNDS SEMI-ANNUAL REPORT --------------------------------------------- JUNE 30, 2004 - -------------------------------------------------------------------------------- Table of Contents - -------------------------------------------------------------------------------- A Letter from the President............. 2 Growth Fund An Overview from the Portfolio Manager.. 4 Portfolio of Investments................ 7 Tax-Managed Growth Fund An Overview from the Portfolio Managers. 8 Portfolio of Investments................ 12 Large Cap Growth Fund An Overview from the Portfolio Managers. 13 Portfolio of Investments................ 16 Small Cap Growth Fund An Overview from the Portfolio Managers. 17 Portfolio of Investments................ 20 Small-Mid Cap Growth Fund An Overview from the Portfolio Managers. 21 Portfolio of Investments................ 24 International Growth Fund An Overview from the Portfolio Manager.. 25 Portfolio of Investments................ 28 International Equity Fund An Overview from the Portfolio Manager.. 32 Portfolio of Investments................ 33 Value Discovery Fund An Overview from the Portfolio Managers. 35 Portfolio of Investments................ 39 Income Fund An Overview from the Portfolio Managers. 40 Portfolio of Investments................ 43 Ready Reserves Fund An Overview from the Portfolio Managers. 46 Portfolio of Investments................ 48 Financial Statements...................... 49 Notes to Financial Statements............. 55 Board of Trustees......................... 74 Officers.................................. 74 This report is submitted for the general information of the shareholders of the William Blair Funds. It is not authorized for distribution to prospective investors unless accompanied or preceded by a prospectus of the William Blair Funds. Please carefully consider the Funds' investment objectives, risks, charges, and expenses before investing. This and other information is contained in the Funds' prospectus, which you may obtain by calling 1-800-742-7272. Read it carefully before you invest or send money. June 30, 2004 William Blair Funds 1 [PHOTO OF MARCO HANIG] Marco Hanig - -------------------------------------------------------------------------------- A LETTER FROM THE PRESIDENT - -------------------------------------------------------------------------------- Dear Shareholders: In the first half of this year, the stock market advanced modestly. The Standard & Poor's 500 Index of large cap stocks was up 3.44%, the Russell 2000 Index of small cap stocks increased 6.76%, and the MSCI World ex-US Index of foreign stocks gained 4.10%. Last year's tax cut and low interest rates were supposed to provide a powerful stimulus to the economy--which indeed responded with strong growth in GDP and corporate earnings. As a result, the market bounced back from its March low point and ended last year 25-45% higher. This year two opposing forces are at work. On the one hand, the economy is fundamentally healthy with continued GDP and corporate earnings growth, albeit at a more normal pace. On the other hand, the Fed raised interest rates to slow down growth, as it wants to prevent the economy from overheating and make sure that inflation remains in check--particularly in light of the recent rise in energy prices. So far, it appears that the Fed is "tapping on the breaks" in just the right measure, succeeding in slowing down the growth without choking it off. The result is a stock market that has been rising at a moderate, sustainable pace. The market dislikes uncertainty, and there are several areas of concern, such as the outcome of the upcoming election, the impact of rising interest rates, the possibility of another major terrorist act, and anxiety over the future direction of our Middle East policy. Hence, most observers expect the market to continue to move mostly sideways in the next few quarters. Should some of this uncertainty be resolved, the underlying strength of the economy would suggest that we might expect single-digit, or even low teen returns over the coming years. Looking across different asset classes, in the first half of the year small cap stocks did slightly better than large caps, and value stocks a bit better than growth stocks, but these differences were not very pronounced. This reinforces the picture of a market essentially in equilibrium, without strong currents favoring any one sector or capitalization range. Our belief is that this should favor our bottom-up fundamental research approach that focuses on individual stock selection. Total Returns by Fund Category* January 1 through June 30, 2004 Value Blend Growth ----- ----- ------ Large Cap......................................... 3.46% 2.78% 2.42% Mid Cap........................................... 6.21% 5.50% 4.57% Small Cap......................................... 7.86% 7.11% 4.09% So far this year, the relative returns for most of the William Blair Funds were somewhat disappointing, with all but two funds underperforming their respective benchmarks--albeit by fairly modest amounts. The two notable exceptions were the Small Cap Growth Fund (Class N Shares), which posted an 11.54% return vs. 5.68% for the Russell 2000(R) Growth benchmark, and the recently launched Small-Mid Cap Growth Fund (Class N Shares), which had a 7.04% return vs. 5.65% for the Russell 2500(TM) Growth index. The reasons for the over- or under-performance vary from fund to fund, and are discussed in detail in the portfolio manager letters included in this report. While we want to be candid when our results do not shine, we frankly do not attach much significance to relative performance (either good or bad) over such a short time period. As always, we thank you for investing with us! /s/ Marco Hanig Marco Hanig - ---------- * Morningstar category returns represent the (non-weighted) average annual composite performance of all mutual funds listed in a particular category (such as Large Cap Growth) by Morningstar. Past performance does not guarantee future results and current performance may be lower or higher than the data quoted. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. For the most current month-end performance information, please call 1-800-742-7272, or visit our Web site at www.williamblairfunds.com. 2 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- PERFORMANCE AS OF JUNE 30, 2004--CLASS N SHARES - -------------------------------------------------------------------------------- 10 Yr Overall Year to (or since Inception Morningstar Date 1 Yr 3 Yr 5 Yr inception) Date Rating ------- ----- ----- ----- ---------- --------- ------------------------------ Growth Fund -0.10 12.93 -4.03 -3.85 8.40 3/20/46 *** Morningstar Large Cap Growth 2.42 16.58 -4.58 -4.89 9.06 Among 985 Russell 3000(R) Growth 2.96 18.82 -3.48 -6.05 9.78 large cap growth funds Standard & Poor's 500 3.44 19.11 -0.69 -2.20 11.83 Tax-Managed Growth Fund **** Return before Taxes 1.07 14.40 -2.53 -3.54 12/27/99 Among 985 After Taxes on Distributions 1.07 14.40 -2.53 -3.54 large cap growth funds After Taxes on Distributions and Sale of Fund Shares 0.70 9.36 -2.14 2.98 Morningstar Large Cap Growth 2.42 16.58 -4.58 -- Russell 3000(R) Growth 2.96 18.82 -3.48 -10.38 Large Cap Growth Fund -0.84 12.21 -6.05 -11.10 12/27/99 *** Morningstar Large Cap Growth 2.42 16.58 -4.58 -- Among 985 Russell 1000(R) Growth 2.74 17.88 -3.74 -10.83 large cap growth funds Small Cap Growth Fund 11.54 44.36 16.30 23.21 12/27/99 ***** Morningstar Small Cap Growth 4.09 28.31 -0.04 -- Among 537 Russell 2000(R) Growth 5.68 31.55 -0.22 -4.53 small cap growth funds The Small Cap Growth Fund's performance during 2000 was primarily attributable to investments in initial public offerings (IPOs) during a rising market. Since then, IPOs have had an insignificant effect on the Fund's performance. Small-Mid Cap Growth Fund 7.04 -- -- -- 6.40 12/29/03 Not rated. Morningstar Mid-Cap Growth 4.57 -- -- -- -- Russell 2500/TM/ Growth 5.65 -- -- -- 5.00 International Growth Fund 2.95 31.75 5.37 8.88 10.32 10/1/92 ***** Morningstar Foreign Large Growth 2.46 25.99 -0.12 -1.96 3.48 Among 176 MSCI World Free Ex-US 4.10 32.50 5.25 0.96 4.40 foreign large cap growth funds International Equity Fund 5.60 -- -- -- 5.60 5/24/04 Not rated. MSCI World Free Ex. US. 5.18 -- -- -- 5.18 Value Discovery Fund 5.25 31.73 9.69 13.11 13.57 12/23/96 *** Morningstar Small Cap Value 7.86 33.95 11.80 12.65 -- Among 194 Russell 2000(R) 6.76 33.37 6.24 6.63 8.39 small cap value funds Russell 2000(R) Value 7.83 35.17 12.15 12.82 12.43 Income Fund -0.44 0.23 4.88 5.75 6.18 10/1/90 ***** Morningstar Short-Term Bond -0.06 0.27 3.72 4.90 5.43 Among 206 Lehman Intermediate Govt./Credit Bond short-term bond funds Index -0.11 -0.06 6.21 6.75 6.89 Past performance does not guarantee future results and current performance may be lower or higher that the data quoted. Returns shown are average annual total returns, which assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or a loss when you sell shares. For the most current month-end performance information, please call 1-800-742-7272, or visit our Web site at www.williamblairfunds.com. Investing in smaller companies involves special risks, including higher volatility and lower liquidity. International and emerging markets investing involves special risk considerations, including currency fluctuations, lower liquidity, economic and political risk. From time to time, the investment advisor may waive fees or reimburse expenses for certain Funds. Without these waivers, performance would be lower. Class N shares are available to the general public without a sales load. Tax-Managed Growth Fund's after-tax returns are calculated using the highest historical individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor's tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts. After-tax returns are shown only for Class N and the after-tax returns for other classes will vary. Morningstar Ratings/TM /are as of 6/30/04 and are subject to change every month. The ratings are based on a risk-adjusted return measure that accounts for variation in a fund's monthly performance, placing more emphasis on downward variations and rewarding consistent performance. The top 10% of funds in each Category receive 5 stars, the next 22.5% receive 4 stars, the middle 35% receive 3 stars, the next 22.5% receive 2 stars, and the bottom 10% receive 1 star. The Overall Morningstar Rating for a fund is derived from a weighted-average of the performance figures associated with its three-, five- and ten-year (if applicable) Morningstar Rating metrics. The 3/5/10 year Morningstar ratings were as follows: Growth Fund ***/***/***, Tax-Managed Growth Fund ****/NA/NA, and Large Cap Growth Fund ***/NA/NA, out of 985/666/233 large growth funds; Small Cap Growth Fund *****/NA/NA out of 537 small growth funds; Value Discovery Fund **/***/NA out of 194/148 small value funds; International Growth Fund *****/*****/***** out of 176/132/36 foreign large growth funds; Income Fund *****/*****/***** out of 206/162/90 short-term bond funds. Please carefully consider the Funds' investment objectives, risks, charges, and expenses before investing. This and other information is contained in the Funds prospectus, which you may obtain by calling 1-800-742-7272. Read it carefully before you invest or send money. (C)William Blair & Company, L.L.C., distributor. 6/04 See accompanying Notes to Financial Statements. June 30, 2004 William Blair Funds 3 [PHOTO] JOSTRAND John F. Jostrand - -------------------------------------------------------------------------------- GROWTH FUND - -------------------------------------------------------------------------------- The Growth Fund invests primarily in a diversified portfolio of common stocks of domestic growth companies with sustainable, above-average growth from one business cycle to the next. - -------------------------------------------------------------------------------- AN OVERVIEW FROM THE PORTFOLIO MANAGER - -------------------------------------------------------------------------------- How did the Fund perform in the first half of the year? How did the Fund's performance compare to its benchmark? The Growth Fund posted a 0.10% decrease on a total return basis (Class N Shares) for the six months ended June 30, 2004. By comparison, the Fund's benchmarks, the Russell 3000(R) Growth Index increased 2.96%, while the Standard & Poor's 500 Index increased 3.44%. What were the most significant factors impacting Fund performance? What factors were behind the Fund's underperformance versus the benchmark? The first six months of the year the market continued some of the trend seen in late 2003, when companies with lower earnings quality outperformed. With regards to the Fund's first half of the year, one major element of the Growth Fund's underperformance to the Russell 3000(R) Growth Index came in the technology sector. As is frequently true, the technology sector proved a challenging place to invest, with various sub-categories turning in widely disparate returns. Internet services stocks continued to enjoy strong appreciation, while computer hardware companies were up modestly and semiconductors were in negative territory. As we mentioned before, low quality, low price stocks ruled the performance derby in 2003. Most of these stocks outperformed based on expectations that these companies would stand to benefit the most from an economic recovery. Consistent with our philosophy, these low quality growth stocks, however, do not meet our Fund's investment criteria. Late in the first quarter, with the tempo of the economy slowing, higher quality stocks did begin to show signs of strength. Companies with interest rate sensitivity, particularly financial and consumer discretionary stocks were also laggards as concerns loomed with the Federal Reserve set to raise interest rates. Although the Fund underperformed early in the first quarter as the winners of 2003 had one last run, the Fund outperformed when the market weakened. By the end of the first quarter, the Fund worked back to almost even with its benchmark. What were among the best performing sectors for the Fund? Were there any investment themes that produced the best results? The Health Care sector was the largest contributor to our performance. Within the sector, Alcon and Zimmer Holdings continue to be strong outperformers with first half returns of 30% and 25% respectively. Alcon, the global medical company that specializes in eye care related products, continues to execute their business strategy. Their most recent quarter saw earning's gains of 35% spread throughout each of their divisions. We are confident that Alcon will continue to gain market share and increase sales per account with new products continuing to come to market. Zimmer's orthopedic sales remain robust. We expect strong double-digit earnings growth through 2006. Pricing remains favorable, and the demographic backdrop (aging baby-boomers) should extend revenue growth. 4 Semi-Annual Report June 30, 2004 What were among the weakest performing sectors for the Fund? Were there any investments that did not measure up to your expectations? The consumer discretionary sector weighed on the Fund's first six months' performance. CarMax, a leading retailer of used cars and trucks had a difficult first half of the year. Consumers have been substituting new cars in place of used because of automobile manufacturers increasing usage of incentives. Although the industry has been under stress, CarMax continues to take market share. Switching from autos to airplanes, another holding that underperformed in the first half was Ryanair based out of Ireland. From a profitability standpoint they remain the leader, but a combination of unfavorable government regulations and stepped up competition has impacted their margins. What is your current strategy? How is the Fund positioned? The next boost to the economy is more likely to come from corporate spending, as many companies now maintain record levels of cash. We expect as consumer spending slows, the corporate sector will take the baton and increase capital expenditures. As business executives' optimism increases, they will begin to increase their profit reinvestment or raise their dividends to shareholders. To facilitate the reinvestment, businesses will have to increase hiring, which should modestly revitalize consumer spending. Our recent increase in Danaher this quarter illustrates our positioning given our outlook of higher interest rates and increased capital spending. Danaher's diversified industrial customer base has much stronger balance sheets than year's past. To maintain its growth, Danaher's customers will need to reinvest in its businesses. Earnings strength remained positive into the end of the first half. However, we are now entering the point of the earnings cycle where relatively easy comparisons are over and companies' earnings acceleration slows. In our opinion, earnings will remain solid; however, they will likely slow to approximate historical trend line growth. As this transition occurs, quality growth tends to outperform the leveraged, lower-quality companies as higher interest rates make financing more challenging. June 30, 2004 William Blair Funds 5 - -------------------------------------------------------------------------------- Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Performance Highlights - -------------------------------------------------------------------------------- Annual Total Return -------------------------------------- 6/30/2004(a) 2003 2002 2001 2000 1999 ------------ ----- ------ ------ ------ ----- Growth Fund Class N......... (0.10)% 23.70% (25.85)% (13.53)% (7.47)% 19.98% Growth Fund Class I......... 0.00 24.14 (25.71) (13.33) (7.27) 19.91(a)(b) Russell 3000(R) Growth Index 2.96 30.97 (28.03) (19.63) (22.42) 33.82 S&P 500 Index............... 3.44 28.68 (22.10) (11.88) (9.11) 21.04 -------------------------------------- Average Annual Total Return at 6/30/2004 -------------------------------------- Since 1 Year 3 Year 5 Year 10 Year Inception ------ ------ ------ ------- --------- Growth Fund Class N 12.93% (4.03)% (3.85)% 8.40% --% Growth Fund Class I 13.26 (3.79) -- -- (2.45)(c) -------------------------------------- (a)Total return is not annualized for periods that are less than a full year. (b)For the period from October 1, 1999 (Commencement of Operations) to December 31, 1999. (c)For the period from October 1, 1999 to June 30, 2004. Illustration of an assumed investment of $10,000 with reinvestment of capital gain distributions and income dividends [CHART] Growth Fund - Russell 3000/R/ S&P 500 Class N Growth Index Index 1993 $10,000 $10,000 $10,000 1994 10,600 10,200 10,100 1995 13,700 14,000 13,900 1996 16,200 17,000 17,100 1997 19,500 21,900 22,900 1998 24,800 29,600 29,400 1999 29,700 39,600 35,600 2000 27,500 30,700 32,300 2001 23,800 24,700 28,500 2002 17,600 17,800 22,200 2003 21,800 23,300 28,600 6/04 21,800 23,900 29,500 Past performance does not guarantee future results and current performance may be lower or higher than the data quoted. Total returns shown assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. For the most current month-end performance information, please call 1-800-742-7272, or visit our Web site at www.williamblairfunds.com. Class N shares are available to the general public without a sales load. The performance highlights and graph presented above do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The Russell 3000(R) Growth Index consists of large, medium, and small-capitalization companies with above average price-to-book ratios and forecasted growth rates. The index is weighted by market capitalization and large/medium/small companies make up approximately 80%/15%/5% of the index. The S&P 500 Index indicates broad larger capitalization equity market performance. This report identifies the Fund's investments on June 30, 2004. These holdings are subject to change. Not all stocks in the Fund performed the same, nor is there any guarantee that these stocks will perform as well in the future. Market forecasts provided in this report may not necessarily come to pass. 6 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Growth Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) - --------------------------------------------------- -------- Shares Value - --------- ----------------------------------------- -------- Common Stocks Information Technology--32.3% 288,200 *BEA Systems, Inc........................ $ 2,369 89,900 CDW Corporation.......................... 5,732 94,700 *Cognos, Inc.+........................... 3,424 224,900 *Dell, Inc............................... 8,056 49,000 *Digital Insight, Inc.................... 1,016 398,100 *EMC Corporation......................... 4,538 243,200 First Data Corporation................... 10,827 136,400 *Intuit, Inc............................. 5,262 138,525 *Iron Mountain, Inc...................... 6,685 179,525 *Jabil Circuit, Inc...................... 4,520 124,700 Linear Technology Corporation............ 4,922 157,800 Paychex, Inc............................. 5,346 201,900 SAP AG-ADR............................... 8,442 172,700 *Skillsoft Plc-ADR....................... 1,313 37,500 StarTek, Inc............................. 1,343 308,600 *SunGard Data Systems, Inc............... 8,024 838,651 Taiwan Semiconductor Mfg. Co. Ltd.--ADR.. 6,969 -------- 88,788 -------- Health Care--26.2% 100,200 Alcon, Inc.+............................. 7,881 110,000 *Amgen, Inc.............................. 6,003 182,700 *Axcan Pharma, Inc.+..................... 3,855 102,175 Eli Lilly & Company...................... 7,143 78,400 *Express Scripts, Inc., Class "A"........ 6,212 73,900 *Integra LifeSciences Holding Corporation 2,606 171,800 Medtronic, Inc........................... 8,370 242,275 Pfizer, Inc.............................. 8,305 81,200 *ResMed, Inc............................. 4,138 117,900 UnitedHealth Group, Inc.................. 7,339 113,500 *Zimmer Holdings, Inc.................... 10,011 -------- 71,863 -------- Industrials and Services--12.0% 101,500 C.H. Robinson Worldwide, Inc............. 4,653 213,196 Danaher Corporation...................... 11,054 140,000 *Education Management Corporation........ 4,600 171,000 *Knight Transportation, Inc.............. 4,913 159,500 *Labor Ready, Inc........................ 2,472 103,300 *Ryanair Holdings plc--ADR............... 3,386 15,900 Strayer Education, Inc................... 1,774 -------- 32,852 -------- - ---------- *Non-income producing securities ADR = American Depository Receipt + = U.S. listed foreign security - ---------------------------------------------- -------- Shares Value - --------- ------------------------------------ -------- Common Stocks--(continued) Consumer Discretionary--11.8% 185,350 *Bed, Bath & Beyond, Inc............ $ 7,127 141,700 *CarMax, Inc........................ 3,099 98,075 *Cox Communications, Inc., Class "A" 2,725 108,900 *Entercom Communications Corporation 4,062 161,550 Family Dollar Stores, Inc........... 4,914 106,550 Harley-Davidson, Inc................ 6,600 89,900 *Kohl's Corporation................. 3,801 -------- 32,328 -------- Financials--8.0% 165,205 SEI Investments Company............. 4,798 174,050 SLM Corporation..................... 7,040 138,650 State Street Corporation............ 6,799 43,500 XL Capital Ltd., Class "A"+......... 3,283 -------- 21,920 -------- Consumer Staples--3.4% 175,200 PepsiCo, Inc........................ 9,440 -------- Energy--2.7% 66,700 Apache Corporation.................. 2,905 178,300 Suncor Energy, Inc.+................ 4,566 -------- 7,471 -------- Materials--2.3% 200,600 Ecolab, Inc......................... 6,359 -------- Total Common Stock--98.7% (cost $217,557).............................. 271,021 -------- Investment in Affiliate 3,273,228 William Blair Ready Reserves Fund... 3,273 -------- Total Investment in Affiliate--1.2% (cost $3,273)................................ 3,273 -------- Total Investments--99.9% (cost $220,830).............................. 274,294 Cash and other assets, less liabilities--0.1%. 319 -------- Net assets--100.0%............................ $274,613 ======== See accompanying Notes to Financial Statements. June 30, 2004 William Blair Funds 7 [PHOTO] FULLER Mark A. Fuller III [PHOTO] PUSINELLI Gregory J. Pusinelli - -------------------------------------------------------------------------------- TAX-MANAGED GROWTH FUND - -------------------------------------------------------------------------------- The Tax-Managed Growth Fund invests primarily in a diversified portfolio of common stocks of domestic growth companies with sustainable, above-average growth from one business cycle to the next. - -------------------------------------------------------------------------------- AN OVERVIEW FROM THE PORTFOLIO MANAGERS - -------------------------------------------------------------------------------- How did the Fund perform in the first half of the year? How did the Fund's performance compare to its benchmark? For the six-month period ended June 30, 2004, the Tax-Managed Growth Fund posted a 1.07% gain on a total return basis (Class N Shares). By comparison, the Fund's benchmark, the Russell 3000(R) Growth Index increased 2.96% and the Standard & Poor's 500 Stock Index gained 3.44%. What were the most significant factors impacting Fund performance? What factors were behind the Fund's underperformance versus the benchmark? Weakness in two sectors--Consumer Discretionary and Information Technology were largely responsible for the Fund's underperformance versus its benchmark at mid-year. The speculative, lower quality stock rally that dominated the equity markets in 2003 spilled over into early 2004. As we have stated, most of last year's top-performing stocks were lower-quality and more speculative companies with no demonstrated history of earnings growth. Investors believed these companies would be the greatest beneficiaries of an economic and stock market recovery. The majority of these types of companies, however, do not fit our high quality growth criteria. In the latter half of the first quarter, higher quality issues such as those the Fund invests in began to close the performance gap with their lower quality counterparts. We believe investors began to move towards more predictable businesses with solid, demonstrated track records of earnings growth. These companies will be the best equipped to effectively manage their businesses in a more temperate economic climate. The equity markets moved sideways during the second quarter, as the major stock market indexes moved in a trading range for weeks ahead of the Federal Reserve's policy-making Open Market Committee meeting on June 30. The mood was a subdued one as investors mulled over the prospects for rising interest rates, inflation and the tenuous situation in Iraq. What were among the best performing sectors for the Fund? Were there any investment themes that produced the best results? The Industrials and Healthcare sectors were where the Fund had its best performers, with Industrial stocks, in particular, benefiting from signs of strength in the economy. Three of the second quarter's top six performing issues were Industrials, including Expeditors International, a transportation and logistics company focused on imports from the Far East; Knight Transportation, a trucking company; and Choicepoint, a company which conducts background security checks for firms hiring new employees. As employment numbers have grown, Choicepoint has seen greater demand for its services. 8 Semi-Annual Report June 30, 2004 Within the Healthcare sector, Alcon, Stryker and Zimmer Holdings also were strong performers. Alcon is a global leader in developing, manufacturing, and selling ophthalmology drugs, supplies, and surgical devices, and also sells consumer eye-care products such as contact lens-cleaning solution. Stryker and Zimmer Holdings are both firms involved in the design and manufacture of orthopedic products and devices. The Fund's best performing investment--for both the second quarter as well as the year-to-date period--was Whole Foods, in the Consumer Staples sector. The company has benefited from the heightened focus by consumers on eating healthier foods, and to a lesser extent as consumers and investors avoided supermarket retailers involved in recent labor disputes. Whole Foods also dominates a market segment in which there is no strong "number two" competitor. What were among the weakest performing sectors for the Fund? Were there any investments that did not measure up to your expectations? As previously mentioned, the Consumer Discretionary and Information Technology sectors accounted for most of the weakness in the Fund's portfolio. The worst-performing issue for the quarter as well as the year-to-date period was Vistacare, in the Health Care sector. Vistacare is a hospice-care provider which has grown rapidly since the company first went public in 2003. The company has seen a slowdown in admissions growth, partly due to a reorganization of its sales force and sales process. As a result, the company has lowered its earnings "guidance" (forecasts) going forward. We believe this company is facing a challenging and more competitive market environment in the near-term, as the business attracts new entrants and is subjected to downward pricing pressure. We will be closely monitoring the company to see if Vistacare has hit a "pothole" in the road, or if its business is undergoing a fundamental change. CarMax was the second worst-performing stock. CarMax was hurt by continued dealer incentives for new cars, as well as rising used car prices. The price increase in used cars is attributed to the low cost of financing new cars, which results in a decrease in leased cars. Fewer leased cars means that fewer used cars are returned to dealer fleets when the leases expire. Finally, a number of current car owners have negative "equity" in their cars as the value of their car loans exceeds the trade-in value of their vehicles. We nonetheless remain convinced that the rationale for originally investing in CarMax is intact: the company has an excellent management team, it has a superior business proposition for consumers, no dominant competitors, and the company is still in the very early stage of significant long-term growth. Other poor performers included Weight Watchers, which reflected migrating consumer preferences to try out other dieting alternatives, such as the current "low-carb" diet fad, and Family Dollar Stores, whose customers have been hurt by the recent rise in energy prices. Family Dollar customers' disposable income is disproportionately impacted by higher gasoline prices, so an increase at the pump means that its customers will have less to spend in their stores. Lastly, Technology was a volatile sector during the first quarter, and many of the chip manufacturers came under pressure, with some profit-taking occurring amid impressions that demand might be moderating along with growth in the economy. What is your current strategy? How is the Fund positioned? Unlike the speculative market environment of 2003, the stock market has shifted this year towards profitable companies with good balance sheets and higher returns on invested capital. It is an environment in which we expect our high quality growth emphasis to have a greater impact on performance. June 30, 2004 William Blair Funds 9 With the economic recovery on solid footing, we are evaluating our industry focus and companies that will stand to benefit from the expansion in the economy. As we search for promising candidates for the Fund's portfolio of investments, we intend to maintain reasonable weightings in different sectors, and are not inclined to change our over- or under-weighting in any particular area. We remain committed to our Consumer Discretionary holding in spite of the weakness in that sector. One sector we will be closely monitoring is Media, where two of our holdings, Univision and Clear Channel, are not experiencing the increase in ad spending we would expect at this point in the economic recovery compared to historic trends, especially in advance of the upcoming presidential election. As always, we will continue to focus on and emphasize high-quality names that we believe will serve our investors well. 10 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Tax-Managed Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Performance Highlights - -------------------------------------------------------------------------------- Annual Total Return -------------------------------------- 6/30/2004(a) 2003 2002 2001 2000 1999(a)(b) ------------ ----- ------ ------ ------ ---------- Tax-Managed Growth Fund Class N 1.07% 22.59% (24.37)% (10.02)% (0.98)% 1.80% Tax-Managed Growth Fund Class I 1.29 22.83 (24.12) (9.79) (0.69) 1.80 Russell 3000(R) Growth Index... 2.96 30.97 (28.03) (19.63) (22.42) 0.79 S&P 500 Index.................. 3.44 28.68 (22.10) (11.88) (9.11) 0.85 -------------------------------------- Average Annual Total Return at 6/30/2004 -------------------------------------- Since 1 Year 3 Year Inception(c) ------ ------ ------------ Tax-Managed Growth Fund Class N 14.40% (2.53)% (3.54)% Tax-Managed Growth Fund Class I 14.80 (2.26) (3.26) ---------------------------------------------------- (a)Total return is not annualized for periods that are less than a full year. (b)For the period from December 27, 1999 (Commencement of Operations) to December 31, 1999. (c)For the period from December 27, 1999 to June 30, 2004. Illustration of an assumed investment of $10,000 [CHART] 12/27/99 6/00 12/00 6/01 12/01 6/02 12/02 6/03 12/03 6/04 Tax-Managed Growth Fund Class N $10,000 10,400 10,100 9,200 9,100 7,600 6,900 7,400 8,400 8,500 Russell 3000(R) Growth Index $10,000 10,500 7,800 6,800 6,300 5,000 4,500 5,100 5,900 6,100 S&P 500 Index $10,000 10,000 9,200 8,600 8,100 7,000 6,300 7,000 8,100 8,400 Past performance does not guarantee future results and current performance may be lower or higher than the data quoted. Total returns shown assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. For the most current month-end performance information, please call 1-800-742-7272, or visit our Web site at www.williamblairfunds.com. From time to time, the investment adviser may waive fees or reimburse expenses for the Fund. Without these waivers, performance would be lower. Class N shares are available to the general public without a sales load. The performance highlights and graph presented above do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The Russell 3000(R) Growth Index consists of large, medium, and small-capitalization companies with above average price-to-book ratios and forecasted growth rates. The index is weighted by market capitalization and large/medium/small companies make up approximately 80%/15%/5% of the index. The S&P 500 Index indicates broad larger capitalization equity market performance. This report identifies the Fund's investments on June 30, 2004. These holdings are subject to change. Not all stocks in the Fund performed the same, nor is there any guarantee that these stocks will perform as well in the future. Market forecasts provided in this report may not necessarily come to pass. June 30, 2004 William Blair Funds 11 - -------------------------------------------------------------------------------- Tax-Managed Growth Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) - --------------------------------------------- ------ Shares Value - ------ -------------------------------------- ------ Common Stocks Health Care--21.3% 2,115 Alcon, Inc.+.......................... $ 166 805 Allegran, Inc......................... 72 1,855 *Amgen, Inc........................... 101 2,265 *Express Scripts, Inc., Class "A"..... 179 1,425 Guidant Corporation................... 80 3,675 Pfizer, Inc........................... 126 3,190 *ResMed, Inc.......................... 163 1,400 Stryker Corporation................... 77 2,260 *Vistacare, Inc., Class "A"........... 42 2,390 *Zimmer Holdings, Inc................. 211 ------ 1,217 ------ Information Technology--21.2% 5,775 *BISYS Group.......................... 81 1,380 *Caci International, Inc., Class "A".. 56 1,640 CDW Corporation....................... 105 3,240 First Data Corporation................ 144 2,955 *Fiserv, Inc.......................... 115 3,165 *Intuit, Inc.......................... 122 3,595 *Jabil Circuit, Inc................... 90 2,610 Microchip Technology, Inc............. 82 3,930 Microsoft Corporation................. 112 1,740 Paychex, Inc.......................... 59 4,495 *SunGard Data Systems, Inc............ 117 8,539 Taiwan Semiconductor Mfg. Co. Ltd--ADR 71 1,790 Xilinx, Inc........................... 60 ------ 1,214 ------ Consumer Discretionary--17.7% 2,100 *Bed, Bath & Beyond, Inc.............. 80 2,750 *CarMax, Inc.......................... 60 2,200 Clear Channel Communications.......... 81 4,200 *Comcast Corporation, Class "A"....... 116 3,355 Family Dollar Stores, Inc............. 102 3,280 *InterActiveCorp...................... 99 990 *Kohl's Corporation................... 42 2,925 Lowe's Companies, Inc................. 154 2,135 Regis Corporation..................... 95 1,840 *Univision Communications, Inc........ 59 3,695 *Williams-Sonoma, Inc................. 122 ------ 1,010 ------ Industrials and Services--16.8% 2,485 C.H. Robinson Worldwide, Inc.......... 114 1,400 *ChoicePoint, Inc..................... 64 - ---------- * Non-income producing securities ADR = American Depository Receipt + = US. listed foreign security - ----------------------------------------------- ------ Shares Value - ------ ---------------------------------------- ------ Common Stocks--(continued) Industrials and Services--(continued) 4,030 Danaher Corporation..................... $ 209 2,475 Expeditors International of Washington.. 122 3,170 Fastenal Company........................ 180 3,605 General Electric Company................ 117 2,370 *Knight Transportation, Inc............. 68 2,725 *Ryanair Holdings plc--ADR.............. 90 ------ 964 ------ Financials--9.7% 2,240 American International Group............ 160 2,270 Investors Financial Services Corporation 99 2,145 Moody's Corporation..................... 138 1,665 State Street Corporation................ 82 1,010 XL Capital Ltd., Class "A"+............. 76 ------ 555 ------ Consumer Staples--7.3% 1,110 Colgate-Palmolive Company............... 65 3,115 PepsiCo, Inc............................ 168 2,395 Walgreen Co............................. 87 1,040 Whole Foods Market, Inc................. 99 ------ 419 ------ Materials--5.0% 5,930 Airgas, Inc............................. 142 2,320 Ecolab, Inc............................. 74 1,810 Praxair, Inc............................ 72 ------ 288 ------ Energy--2.7% 6,060 Suncor Energy, Inc.+.................... 155 ------ Total Common Stock--101.7% (Cost $4,545)................................. 5,822 ------ Investment in Affiliate 1,598 William Blair Ready Reserves Fund....... 2 ------ Total Investment in Affiliate--0.1% (Cost $2)..................................... 2 ------ Total Investments--101.8% (Cost $4,547)................................. 5,824 Liabilities plus cash and other assets--(1.8)%. (104) ------ Net assets--100.0%............................. $5,720 ====== See accompanying Notes to Financial Statements. 12 Semi-Annual Report June 30, 2004 [PHOTO] BARBER Rocky Barber [PHOTO] JOSTRAND John F. Jostrand [PHOTO] Norbert W. Truderung Norbert W. Truderung - -------------------------------------------------------------------------------- LARGE CAP GROWTH FUND - -------------------------------------------------------------------------------- The Large Cap Growth Fund invests primarily in common stocks of large domestic growth companies of high quality that have demonstrated sustained growth over a long period of time. - -------------------------------------------------------------------------------- AN OVERVIEW FROM THE PORTFOLIO MANAGERS - -------------------------------------------------------------------------------- How did the Fund perform in the first half of the year? How did the Fund's performance compare to its benchmark? The Large Cap Growth Fund posted a 0.84% decrease on a total return basis (Class N Shares) for the six months ended June 30, 2004. By comparison, the Fund's benchmark, the Russell 1000 Growth(R) Index, increased 2.74%. What were the most significant factors impacting Fund performance? What factors were behind the Fund's underperformance versus the benchmark? During the first few months of 2004 the market seemed to be digesting the gains achieved in 2003. With respect to the Fund's first half, one major element of the Large Cap Growth Fund's underperformance to the Russell 1000(R) Growth Index came in the technology sector. As is frequently true, the technology sector proved a challenging place to invest, with various sub-categories turning in widely disparate returns. Internet services stocks continued to enjoy strong appreciation, while computer hardware companies were up modestly and semiconductors were in negative territory. As we mentioned before, low quality, low price stocks ruled the performance derby in 2003. Most of these stocks outperformed based on expectations that these companies would stand to benefit the most from an economic recovery. Consistent with our philosophy, these low quality growth stocks, however, do not meet our Fund's investment criteria. Late in the first quarter, with the tempo of the economy slowing, higher quality stocks did begin to show signs of strength. Companies with interest rate sensitivity, particularly financial and consumer discretionary stocks were also laggards as concerns loomed with the Federal Reserve set to raise interest rates. Although the Fund underperformed early in the first quarter as the low-quality winners of 2003 had one last run, the Fund outperformed when the market weakened. By the end of the first quarter, the Fund worked back to almost even with its benchmark. What were among the best performing sectors for the Fund? Were there any investment themes that produced the best results? The Health Care sector was the largest contributor to our performance. Within the Health Care sector, Alcon and Zimmer Holdings continue to be strong outperformers with second quarter returns of 24% and 20% respectively. Alcon, the global medical company that specializes in eye care related products, continues to execute its business strategy. Alcon's most recent quarter saw earnings gains of 35% spread throughout each of its divisions. We are confident that Alcon will continue to gain market share and increase sales per account with new products continuing to come to market. Zimmer's orthopedic sales remain robust. We expect strong double-digit earnings growth through 2006. Pricing remains favorable, and the demographic backdrop (aging baby-boomers) should extend revenue growth. June 30, 2004 William Blair Funds 13 What were among the weakest performing sectors for the Fund? Were there any investments that did not measure up to your expectations? BEA Systems, a software company, proved a significant detractor from performance. Our initial rationale for the purchase was BEA's dominant software offering. Although we still believe its products have relative strengths, customers are currently indicating a stronger interest in purchasing lower-priced (and in our opinion, lower quality) bundled software offerings. The Fund's consumer discretionary holdings did not keep pace with the overall market. Cox Communication was the largest detractor during the first half of the year. With the majority of the costs associated with the deployment of the next generation of cable behind them, the cable companies' balance sheets are in much better shape. However the market is now concerned with satellite's growing subscriber companies becoming more of a competitor. What is your current strategy? How is the Fund positioned? The next boost to the economy is more likely to come from corporate spending, as many companies now have record levels of cash. We expect as consumer spending slows, the corporate sector will take the baton and increase capital expenditures. As business executives' optimism increases, we believe they will begin to increase their profit reinvestment or raise their dividends to shareholders. To facilitate the reinvestment, businesses will have to increase hiring, which should modestly revitalize consumer spending. Our recent increase in Danaher illustrates our positioning given our outlook for increased capital spending. Danaher's diversified industrial customer base has a much stronger balance sheet than in years past. To maintain their growth, Danaher's customers will need to reinvest in its businesses. Earnings strength remained positive into the end of the first half. However, we are now entering the point of the earnings cycle where relatively easy comparisons are over and companies' earnings acceleration slows. In our opinion, earnings will remain solid; however, they will likely slow to the approximate historical trend line growth. As this transition occurs, quality growth tends to outperform the leveraged, lower quality companies as higher interest rates make financing more challenging. 14 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Large Cap Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Performance Highlights - -------------------------------------------------------------------------------- Annual Total Return -------------------------------------- 6/30/2004(a) 2003 2002 2001 2000 1999(a)(b) ------------ ----- ------ ------ ------ ---------- Large Cap Growth Fund Class N (0.84)% 23.54% (28.57)% (20.47)% (16.67)% 1.40% Large Cap Growth Fund Class I (0.83) 24.27 (28.49) (20.43) (16.47) 1.40 Russell 1000(R) Growth Index. 2.74 29.75 (27.88) (20.42) (22.42) 0.46 -------------------------------------- Average Annual Total Return at 6/30/2004 -------------------------------------- Since 1 Year 3 Year Inception(c) ------ ------ ------------ Large Cap Growth Fund Class N 12.21% (6.05)% (11.10)% Large Cap Growth Fund Class I 12.50 (5.86) (10.90) ---------------------------------------------------- (a)Total return is not annualized for periods that are less than a full year. (b)For the period from December 27, 1999 (Commencement of Operations) to December 31, 1999. (c)For the period from December 27, 1999 to June 30, 2004. Illustration of an assumed investment of $10,000 [CHART] Large Cap Growth Fund Russell 1000/R/ Class N Growth Index 12/27/99 $10,000 $10,000 6/00 10,100 10,500 12/00 8,500 7,800 6/01 7,100 6,700 12/01 6,700 6,200 6/02 5,400 4,900 12/02 4,800 4,500 6/03 5,200 5,100 12/03 5,900 5,800 6/04 5,900 6,000 Past performance does not guarantee future results and current performance may be lower or higher than the data quoted. Total returns shown assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. For the most current month-end performance information, please call 1-800-742-7272, or visit our Web site at www.williamblairfunds.com. From time to time, the investment adviser may waive fees or reimburse expenses for the Fund. Without these waivers, performance would be lower. Class N shares are available to the general public without a sales load. The performance highlights and graph presented above do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The Russell 1000(R) Growth Index consists of large-capitalization companies with above average-to-book ratios and forecasted growth rates. This report identifies the Fund's investments on June 30, 2004. These holdings are subject to change. Not all stocks in the Fund performed the same, nor is there any guarantee that these stocks will perform as well in the future. Market forecasts provided in this report may not necessarily come to pass. June 30, 2004 William Blair Funds 15 - -------------------------------------------------------------------------------- Large Cap Growth Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) - ----------------------------------------------- ------ Shares Value - ------- --------------------------------------- ------ Common Stocks Information Technology--28.1% 10,050 *BEA Systems, Inc...................... $ 83 7,450 *Dell, Inc............................. 267 9,600 *EMC Corporation....................... 110 6,500 First Data Corporation................. 289 3,450 *Intuit, Inc........................... 133 3,935 Linear Technology Corporation.......... 155 3,400 Paychex, Inc........................... 115 5,475 SAP AG--ADR............................ 229 8,635 *SunGard Data Systems, Inc............. 225 19,052 Taiwan Semiconductor Mfg. Co. Ltd.--ADR 158 ------ 1,764 ------ Health Care--24.7% 2,500 Alcon, Inc.+........................... 197 3,285 *Amgen, Inc............................ 179 2,255 Eli Lilly & Company.................... 158 4,790 Medtronic, Inc......................... 233 9,465 Pfizer, Inc............................ 324 3,740 UnitedHealth Group, Inc................ 233 2,550 *Zimmer Holdings, Inc.................. 225 ------ 1,549 ------ Consumer Discretionary--12.8% 5,200 *Bed, Bath & Beyond, Inc............... 200 3,685 Clear Channel Communications, Inc...... 136 7,000 *Cox Communications, Inc., Class "A"... 195 2,300 Harley-Davidson, Inc................... 142 3,000 *Kohl's Corporation.................... 127 ------ 800 ------ Financials--10.6% 2,250 Federal National Mortgage Association.. 160 6,000 SLM Corporation........................ 243 3,770 State Street Corporation............... 185 975 XL Capital Ltd., Class "A" +........... 74 ------ 662 ------ - ---------- * Non-income producing securities + U.S. listed foreign security ADR = American Depository Receipt - -------------------------------------------- ------ Shares Value - --------- ---------------------------------- ------ Common Stocks--(continued) Consumer Staples--10.5% 2,900 Avon Products, Inc................ $ 134 3,150 PepsiCo, Inc...................... 170 2,600 Wal-Mart Stores, Inc.............. 137 6,025 Walgreen Co....................... 218 ------ 659 ------ Industrials and Services--7.0% 5,212 Danaher Corporation............... 270 5,150 General Electric Company.......... 167 ------ 437 ------ Energy--2.3% 1,450 Apache Corporation................ 63 3,250 Suncor Energy, Inc.+.............. 83 ------ 146 ------ Materials--2.3% 4,550 Ecolab, Inc....................... 144 ------ Total Common Stock--98.3% (cost $5,382)............................... 6,161 ------ Investment in Affiliate 106,899 William Blair Ready Reserves Fund. 107 ------ Total Investment in Affiliate--1.7% (cost $107)................................. 107 ------ Total Investments--100.0% (cost $5,489)............................... 6,268 Cash and other assets, less liabilities--0.0% -- ------ Net assets--100.0%........................... $6,268 ====== See accompanying Notes to Financial Statements. 16 Semi-Annual Report June 30, 2004 [PHOTO] Michael P. Balkin Michael P. Balkin [PHOTO] BREWER Karl W. Brewer - -------------------------------------------------------------------------------- SMALL CAP GROWTH FUND - -------------------------------------------------------------------------------- The Small Cap Growth Fund invests primarily in common stocks of small domestic growth companies and are expected to experience solid growth in earnings. - -------------------------------------------------------------------------------- AN OVERVIEW FROM THE PORTFOLIO MANAGERS - -------------------------------------------------------------------------------- How did the Fund perform in the first half of the year? How did the Fund's performance compare to its benchmark? The Small Cap Growth Fund posted a 11.54% gain on a total return basis (Class N Shares) for the six months ended June 30, 2004, significantly ahead of its primary benchmark, the Russell 2000(R) Growth Index, which increased 5.68% during the period, and the Russell 2000(R) Index, which rose 6.76%. What were the most significant factors impacting Fund performance? What factors were behind the Fund's outperformance versus the benchmark? When compared to its benchmark, the Small Cap Growth Fund had outperformance in every significant sector (i.e., sectors with over a 5% weight in the Russell 2000(R) Growth Index) in the first half of the year. Small cap stocks were again the best performing asset class in the first quarter as the Russell 2000(R) Index closed at an all time high versus the S&P 500 on a trailing 52-week relative return basis. In the second quarter, the Russell 2000(R) achieved its fifth consecutive up quarter in a row, which had not happened since 1995-96, when the Russell 2000(R) posted six consecutive positive quarters. A change in leadership occurred in the second quarter, as the larger capitalization stocks, as measured by the S&P 500 and Russell 1000 Indices, modestly outpaced the small cap stocks. In contrast to 2003, the most significant impact on the Russell 2000(R) Growth's performance in the first half of the year came from the larger market cap companies in the index as investors shifted their focus away from the more speculative, low-priced micro cap stocks. In the Fund, stock selection in the middle of the small capitalization range was a large benefit to relative performance. While the small cap markets were relatively strong in the first quarter, the second quarter witnessed a more turbulent period. Following a negative start in April and early May, the equity markets turned in the middle of the second quarter and ended in positive territory. Mixed signals on the economic and political fronts created increased volatility and uncertainty during the period. With continued instability in the Middle East contributing to higher oil prices, energy stocks performed well in the second quarter both for the benchmark and the Fund. With the virtually "pre-announced" 0.25% increase in rates by the Federal Reserve, and some remaining concerns about future rate increases, Financial Services, Consumer and Technology stocks in the Russell 2000(R) Growth Index were hit the hardest in the quarter. Which sectors enhanced the Fund's return? What were among the best performing investments for the Fund? The Fund outperformed the benchmark in most sectors, including all of the four major sectors (Consumer Discretionary, Healthcare, Technology and Financial Services) during the first half of the year. The Fund's most significant contributors to absolute performance for the first half of the year were in the Consumer Discretionary and Health Care Sectors, while Technology was the largest contributor to relative performance. The Fund was slightly June 30, 2004 William Blair Funds 17 overweight the Energy sector and our holdings outperformed those in the benchmark. Quicksilver Resources, Inc., a natural gas producer focused primarily on the western United States and Canada, was one of our top contributors to performance. The stock was up significantly in the second quarter due to a combination of successful drilling on several key properties along with an overall strong energy market. The Health Care sector was our biggest contributor to performance in the second quarter and the second largest contributor for the first half of 2004. Although we had a slight underweight in the group relative to the benchmark, our strong stock selection allowed us to significantly outperform the index. Performance was led by three medical device companies (Cyberonics, Kensey Nash Corporation and Integra LifeSciences). Were there any investment strategies or themes that did not measure up to your expectations? While there were no major themes or sectors that disappointed us in the first half, there were individual stocks that performed poorly. Examples of weaker performing stocks include: Vistacare, Inc., a hospice care provider; Alliance Gaming, a casino operator; Asyst Technologies, a manufacturer of ultra-clean semi-conductor systems. In each case, the company gave disappointing earnings guidance, causing the stocks' price to decline. What is your current strategy? How is the Fund positioned? While we were pleased with our performance at mid-year, we believe that the second half of the year could be a more difficult environment. Concerns over higher interest rates, continued instability in the Middle East, increasing energy prices and a slowdown in consumer spending could create some headwinds. Also, uncertainty regarding the outcome of the upcoming Presidential election is likely to create increased volatility in the market. Given these issues, we anticipate that the market could remain in a trading range over the next several quarters. Regardless of overall market trends, we will continue to seek smaller capitalization companies that generally offer interesting opportunities for growth. We believe that the Fund is well positioned for what we think is a "stock pickers" type of market. 18 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Small Cap Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Performance Highlights - -------------------------------------------------------------------------------- Annual Total Return -------------------------------------- 6/30/2004(a) 2003 2002 2001 2000 1999(a)(b) ------------ ----- ------ ----- ------ ---------- Small Cap Growth Fund Class N 11.54% 61.88% (17.25)% 25.99% 33.68% 1.90% Small Cap Growth Fund Class I 11.67 62.15 (17.00) 26.33 33.87 1.90 Russell 2000(R) Growth Index. 5.68 48.54 (30.26) (9.23) (22.43) 5.22 Russell 2000(R) Index........ 6.76 47.25 (20.48) 2.49 (3.02) 4.26 -------------------------------------- Average Annual Total Return at 6/30/2004 -------------------------------------- Since 1 Year 3 Year Inception(c) ------ ------ ------------ Small Cap Growth Fund Class N 44.36% 16.30% 23.21% Small Cap Growth Fund Class I 44.64 16.59 23.48 -------------------------------------- (a)Total return is not annualized for periods that are less than a full year. (b)For the period from December 27, 1999 (Commencement of Operations) to December 31, 1999. (c)For the period from December 27, 1999 to June 30, 2004. Illustration of an assumed investment of $10,000 with reinvestment of capital gain distribution [CHART] Russell Small Cap 2000(R) Russell Growth Fund Growth 2000(R) Class N Index Index 12/99 $10,000 $10,000 $10,000 6/00 14,900 10,700 10,700 12/00 13,600 8,200 10,100 6/01 16,300 8,200 10,800 12/01 17,200 7,400 10,400 6/02 16,400 6,100 9,900 12/02 14,200 5,200 8,200 6/03 17,800 6,200 9,700 12/03 23,000 7,700 12,100 6/04 25,600 8,100 13,000 IPOs made significant contributions to the performance of the Fund in the year 2000. There can be no assurance that such contributions will continue. Recent market volatility has significantly impacted performance and the Fund's current performance may be more or less than that shown. Past performance does not guarantee future results and current performance may be lower or higher than the data quoted. Total returns shown assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. For the most current month-end performance information, please call 1-800-742-7272, or visit our Web site at www.williamblairfunds.com. Investing in smaller companies involves special risks, including higher volatility and lower liquidity. From time to time, the investment advisor may waive fees or reimburse expenses for the Fund. Without these waivers, performance would be lower. Class N shares are available to the general public without a sales load. The performance highlights and graph presented above do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The Russell 2000(R) Growth Index consists of small-capitalization companies with above average price-to-book ratios and forecasted growth rates. The Russell 2000(R) Index is an unmanaged composite of the smallest 2000 stocks of the Russell 3000(R) Index. This report identifies the Fund's investments on June 30, 2004. These holdings are subject to change. Not all stocks in the Fund performed the same, nor is there any guarantee that these stocks will perform as well in the future. Market forecasts provided in this report may not necessarily come to pass. June 30, 2004 William Blair Funds 19 - -------------------------------------------------------------------------------- Small Cap Growth Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) - ----------------------------------------------------- -------- Shares Value - --------- ------------------------------------------- -------- Common Stocks Consumer Discretionary--38.6% 416,065 *4 Kids Entertainment, Inc................. $ 9,952 380,575 *Alliance Gaming Corporation............... 6,531 1,138,630 *Casual Male Retail Group, Inc............. 8,312 358,100 *Century Casinos, Inc...................... 1,952 191,047 *Charles River Associates.................. 5,913 1,079,355 *chinadotcom corporation +................. 7,966 326,195 *Corrections Corporation of America........ 12,881 343,830 *Cross Country Healthcare, Inc............. 6,241 395,710 *Cumulus Media, Inc., Class "A"............ 6,652 203,700 *Elizabeth Arden, Inc...................... 4,286 313,580 *Emmis Communications Corporation, Class "A"................................. 6,579 1,266,025 *eUniverse, Inc............................ 2,811 220,560 *FirstService Corporation +................ 5,514 358,650 Fred's, Inc................................ 7,923 114,235 *Getty Images, Inc......................... 6,854 203,925 *Guitar Center, Inc........................ 9,068 670,515 *Kforce, Inc............................... 6,330 678,630 *Labor Ready, Inc.......................... 10,519 493,020 *Laureate Education, Inc................... 18,853 1,878,430 *Lions Gate Entertainment Corporation+..... 13,111 283,935 *Multimedia Games, Inc..................... 7,615 375,520 Ruby Tuesday, Inc.......................... 10,308 429,870 *Scientific Games Corporation, Class "A"... 8,228 308,661 *Shuffle Master, Inc....................... 11,207 724,720 *SkillSoft plc--ADR........................ 5,508 287,920 Speedway Motorsports, Inc.................. 9,628 225,680 StarTek, Inc............................... 8,079 74,570 Strayer Education, Inc..................... 8,320 363,100 *TiVo, Inc................................. 2,574 640,380 *ValueClick, Inc........................... 7,671 463,005 *ValueVision Media, Inc., Class "A"........ 6,028 623,600 World Wrestling Entertainment, Inc......... 7,951 -------- 251,365 -------- Health Care--19.8% 193,588 *Accredo Health, Inc....................... 7,540 385,900 *American Healthways, Inc.................. 10,273 757,770 *Axcan Pharma, Inc.+....................... 15,989 916,940 *Cell Therapeutics, Inc.................... 6,758 393,280 *Connectics Corporation.................... 7,944 1,228,019 *Discovery Partners International, Inc..... 6,263 144,010 *Icon PLC--ADR............................. 6,335 371,775 *Intergra Lifesciences Holdings Corporation 13,113 240,755 *Kensey Nash Corporation................... 8,306 297,340 *Lifepoint Hospitals, Inc.................. 11,067 331,325 *Matria Healthcare, Inc.................... 8,306 357,720 *Sangamo Biosciences, Inc.................. 2,153 144,770 *Taro Pharmaceutical Industries, Inc. +.... 6,297 345,795 *Telik, Inc................................ 8,254 3,051,885 *VitalWorks, Inc........................... 10,560 -------- 129,158 -------- Technology--18.2% 485,990 *AMIS Holdings, Inc........................ 8,223 629,590 *Answerthink, Inc.......................... 3,607 - ---------- *Non-income producing securities **Security Fair Valued pursuant to Valuation Procedures adopted by Board of Trustees. ADR = American Depository Receipt + = U.S. listed foreign security ++ = Restricted security. The Fund purchased 507,788 restricted shares on May 18, 2003 at a cost of $6,136 (in thousands). The value of the Fund's holding was 0.75% of net assets at June 30, 2004. - --------------------------------------------------- -------- Shares Value - ---------- ---------------------------------------- -------- Common Stocks--(continued) Technology--(continued) 469,140 *Artisan Components, Inc................ $ 12,104 776,280 *Aspen Technology, Inc.................. 5,636 198,655 Harris Corporation...................... 10,082 936,300 *LCC International, Inc., Class "A"..... 4,588 2,463,900 *Loudeye Corporation.................... 3,890 502,450 *Mercury Computer Systems, Inc.......... 12,461 19,540 *Nuance Communications, Inc............. 89 316,530 *Open Solutions, Inc.................... 7,907 338,775 *Open Text Corporation+................. 10,807 723,710 *OPNET Technologies, Inc................ 9,480 1,583,985 *Scansoft, Inc.......................... 7,841 297,030 *Semtech Corporation.................... 6,992 807,788 *Ultimate Software Group, Inc.**++...... 7,763 314,785 *WebEx Communications, Inc.............. 6,850 -------- 118,320 -------- Financial Services--10.1% 197,195 *Affiliated Managers Group, Inc......... 9,933 400,285 *Commercial Capital Bancorp, Inc........ 6,953 449,890 *Credit Acceptance Corp................. 6,780 491,657 *Electronic Clearing House.............. 4,573 279,840 *Euronet Worldwide, Inc................. 6,473 128,840 Global Payments, Inc.................... 5,800 226,350 Investors Financial Services Corporation 9,864 341,095 National Financial Partners Corporation. 12,030 361,130 *Rewards Network, Inc................... 3,250 -------- 65,656 -------- Other Energy--4.4% 330,335 *Comstock Resources, Inc................ 6,428 1,698,955 *Gasco Energy, Inc...................... 3,313 1,342,360 *Grey Wolf, Inc......................... 5,692 99,530 *Quicksilver Resources, Inc............. 6,676 185,245 *Ultra Petroleum Corporation............ 6,915 -------- 29,024 -------- Producer Durables--3.0% 607,180 *Crown Castle International Corporation. 8,956 242,450 *Providence Service Corporation......... 4,556 377,480 *Ultratech, Inc......................... 6,145 -------- 19,657 -------- Materials and Processing--2.6% 437,795 Airgas, Inc............................. 10,468 1,039,610 *Comfort Systems USA, Inc............... 6,643 -------- 17,111 -------- Utilities--0.4% 143,800 Intrado, Inc............................ 2,314 -------- Total Common Stock--97.1% (Cost $528,779)................................... 632,605 -------- Investment in Affiliate 14,796,841 William Blair Ready Reserves Fund....... 14,797 -------- Total Investment in Affiliate--2.3% (Cost $14,797).................................... 14,797 -------- Total Investments--99.4% (Cost $543,576)................................... 647,402 Cash and other assets, less liabilities--0.6%...... 4,101 -------- Net assets--100.0%................................. $651,503 ======== See accompanying Notes to Financial Statements. 20 Semi-Annual Report June 30, 2004 [PHOTO] Karl W. Brewer Karl W. Brewer [PHOTO] Harvey H. Bundy, III Harvey H. Bundy, III [PHOTO] Robert Lanphier, IV Robert C. Lanphier, IV - -------------------------------------------------------------------------------- SMALL-MID CAP GROWTH FUND - -------------------------------------------------------------------------------- The Small-Mid Cap Growth Fund primarily invests in a diversified portfolio of common stocks of small and medium-sized domestic growth companies that are expected to experience solid growth in earnings. - -------------------------------------------------------------------------------- AN OVERVIEW FROM THE PORTFOLIO MANAGERS - -------------------------------------------------------------------------------- How did the Fund perform in the first half of the year? How did the Fund's performance compare to its benchmark? The Small-Mid Cap Growth Fund gained 7.04% (Class N shares) on a total return basis for the six months ended June 30, 2004, compared with a 5.65% increase for the Fund's benchmark, the Russell 2500/TM/ Growth Index. What were the most significant factors impacting Fund performance? What factors were behind the Fund's out-performance versus the benchmark? The year opened with a continuation of the speculative frenzy of 2003, as the lower quality names retained their market leadership. However, as the first quarter progressed, we observed a gradual rotation toward quality growth companies. Following a negative start in April and early May, the equity markets ended the second quarter in positive territory. Mixed signals on the economic and political fronts caused the markets to seek a clear direction during the period. Geopolitical issues also caused oil prices to rise during the quarter. In the first half of the year, the strongest performing sectors in the Russell 2500/TM/ Growth Index were Healthcare and Energy while Technology was the only major sector to report a negative return. The Small-Mid Cap Fund's stock selection was the primary contributor to performance in the first half of the year. Healthcare and Transportation were two of the strongest performing sectors in the portfolio. While we were underweight Technology, which contributed to relative performance, we also had strong stock selection in this industry. One of the Small-Mid Cap Fund's strongest performing holdings was Corporate Executive Board. This company provides subscription-based research and information services to senior executives in major corporations in order to enhance management practices. With relatively low capital expenditures, the company is able to significantly leverage its services and achieve high margin growth. During the softer economy, we believed that many new clients put their intentions to subscribe on hold, and would sign up for services once the economy strengthened. This thesis came to fruition as subscriptions increased significantly and the market recognized the outstanding potential for solid earnings growth. Within the Transportation sector, three stocks that fared very well were Expeditors International, C.H. Robinson, and Knight Transportation. Along with strong managements and good business infrastructures, these companies are poised to benefit from the economic recovery as product deployment is on the rise. Due to our fundamental process and conviction in these names, we are carrying an overweight position in Transportation stocks versus the Russell 2500/TM/ Growth Index. June 30, 2004 William Blair Funds 21 Which strategies did not measure up to your expectations? Two industries in which our companies did not meet our expectations were Retailing and Technology Software. In Retailing, 99 Cents Only stores experienced a significant stock price decrease. The company had fared well in their home state of California, but ran into significant difficulty executing their strategy in their newly opened Texas sites. Another Retailing company that had some difficulty during the first half of the year was CarMax. CarMax is a company that has strong management and is well-positioned within the used car sales business, but suffered from significant competition from incentives in the new car market which severely hampered sales. The company continues to be a dominant player in this market and has an ability to be relatively flexible with its product offering, which we believe will bring their earnings back slowly over time. Software companies Intuit and BEA Systems were also disappointments. BEA Systems disappointed investors with their earnings report. Our analysis concluded that BEA would not be able to achieve our expectations on subsequent earnings growth and we exited the position. Slowing revenue growth at Intuit disappointed investors. However, we believe that the current valuation more than discounts this trend. We are still positive on Intuit's ability to generate strong annual growth in earnings and we maintain our position in Intuit. What is your current strategy? How is the Fund Positioned? Our focus continues to be on selecting quality growth companies that should perform well in a moderate economic growth environment. Of the four largest sectors in the Russell 2500/TM/ Growth Index, we are currently overweight Consumer Discretionary, and underweight Technology. Healthcare and Financial Services sectors in the portfolio are relatively close to their respective benchmark weights. 22 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Small-Mid Cap Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Performance Highlights - -------------------------------------------------------------------------------- Annual Total Return -------------------------------------- 6/30/2004(a) 2003(a)(b) ------------ ---------- Small-Mid Cap Growth Fund Class N 7.04% (0.60)% Small-Mid Cap Growth Fund Class I 7.14 (0.60) Russell 2500(TM) Growth Index.... 5.65 (0.61) -------------------------------------- Average Annual Total Return at 6/30/2004 -------------------------------------- Since Inception(c) ------------ Small Cap Growth Fund Class N 6.40% Small Cap Growth Fund Class I 6.50 -------------------------------------- (a)Total return is not annualized for periods that are less than a full year. (b)For the period from December 29, 2003 (Commencement of Operations) to December 31, 2003. (c)For the period from December 29, 2003 to June 30, 2004. Illustration of an assumed investment of $10,000 [CHART] Small-Mid Cap Russell 2500 Fund Class N Growth Index ------------- ------------ 12/03 $10,000 $10,000 1/04 10,100 10,400 2/04 10,300 10,400 3/04 10,300 10,500 4/04 10,300 10,000 5/04 10,300 10,300 6/04 10,600 10,500 Past performance does not guarantee future results and current performance may be lower or higher than the data quoted. Total returns shown assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. For the most current month-end performance information, please call 1-800-742-7272, or visit our Web site at www.williamblairfunds.com. Investing in smaller companies involves special risks, including higher volatility and lower liquidity. From time to time, the investment advisor may waive fees or reimburse expenses for the Fund. Without these waivers, performance would be lower. Class N shares are available to the general public without a sales load. The performance highlights and graph presented above do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The Russell 2500(TM) Growth Index measures the performance of those Russell 2500 companies with above average price-to-book ratios and forcasted growth rates. This report identifies the Fund's investments on June 30, 2004. These holdings are subject to change. Not all stocks in the Fund performed the same, nor is there any guarantee that these stocks will perform as well in the future. Market forecasts provided in this report may not necessarily come to pass. June 30, 2004 William Blair Funds 23 - -------------------------------------------------------------------------------- Small-Mid Cap Growth Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) - ------------------------------------------------- ------ Shares Value - ------ ------------------------------------------ ------ Common Stocks Consumer Discretionary--32.1% 5,400 *99 Cents Only Stores..................... $ 82 4,200 *Bed, Bath and Beyond, Inc................ 161 12,800 *CarMax, Inc.............................. 280 6,300 CDW Corporation........................... 402 4,200 Cintas Corporation........................ 200 6,300 Corporate Executive Board Co.............. 364 4,700 *Corrections Corporation of America....... 186 9,800 *Cross Country Healthcare, Inc............ 178 4,100 *Entercom Communications Corporation...... 153 6,700 Fastenal Company.......................... 381 2,600 *Getty Images, Inc........................ 156 4,400 *Guitar Center, Inc....................... 196 4,800 *Hewitt Associates, Inc., Class "A"....... 132 6,300 *Iron Mountain, Inc....................... 304 5,100 *Lamar Advertising Company................ 221 11,400 *Laureate Education, Inc.................. 436 8,700 *O'Reilly Automotive, Inc................. 393 4,000 *Shuffle Master, Inc...................... 145 13,000 *Skillsoft PLC--ADR....................... 99 1,500 Strayer Education, Inc.................... 167 ------ 4,636 ------ Health Care--19.2% 1,700 *Atrix Labs, Inc.......................... 58 14,600 *Axcan Pharma, Inc.+...................... 308 10,700 *Connectics Corporation................... 216 6,100 *Express Scripts, Inc..................... 483 2,700 *IDEXX Laboratories, Inc.................. 170 8,300 *Integra LifeSciences Holdings Corporation 293 5,800 *IVAX Corporation......................... 139 4,200 *Kensey Nash Corporation.................. 145 4,700 *Medicines Company........................ 144 2,800 *Patterson Companies, Inc................. 214 5,000 *ResMed, Inc.............................. 255 3,900 *Stericycle, Inc.......................... 202 6,400 *Telik, Inc............................... 153 ------ 2,780 ------ Technology--14.9% 5,100 Adobe Systems, Inc........................ 237 8,600 *Artisan Components, Inc.................. 222 8,300 *Cognos, Inc.+............................ 300 8,000 *Intuit, Inc.............................. 309 11,200 *Jabil Circuit, Inc....................... 282 12,400 Microchip Technology, Inc................. 391 11,800 *OPNET Technologies, Inc.................. 155 3,600 Xilinx, Inc............................... 120 1,500 *Zebra Technologies Corp., Class "A"...... 130 ------ 2,146 ------ - ---------- * Non-income producing securities ADR = American Depository Receipt + = U.S. listed foreign security - ------------------------------------------------ ------- Shares Value - ------------------------------------------------ ------- Common Stocks--(continued) Financial Services--10.2% 4,500 *Affiliated Managers Group.............. $ 227 5,000 East West Bancorp, Inc.................. 153 7,500 *Fiserv, Inc............................ 292 8,500 Investors Financial Services Corporation 370 11,200 *SunGard Data Systems, Inc.............. 291 1,800 XL Capital Ltd., Class "A"+............. 136 ------- 1,469 ------- Autos and Transportation--8.1% 4,800 C.H. Robinson Worldwide, Inc............ 220 8,600 Expeditors International of Washington.. 425 4,600 Gentex Corporation...................... 183 11,700 *Knight Transportation, Inc............. 336 ------- 1,164 ------- Other Energy--4.1% 6,500 Apache Corporation...................... 283 5,600 *Smith International, Inc............... 312 ------- 595 ------- Producer Durables--3.1% 18,200 *Crown Castle International Corporation. 268 5,200 Pentair, Inc............................ 175 ------- 443 ------- Materials and Processing--2.3% 14,000 Airgas, Inc............................. 335 ------- Total Common Stock--94.0% (Cost $12,895)................................. 13,568 ------- Investment in Affiliate 760,777 William Blair Ready Reserves Fund....... 761 ------- Total Investment in Affiliate--5.3% (Cost $761).................................... 761 ------- Total Investments--99.3% (Cost $13,656)................................. 14,329 Cash and other assets, less liabilities--0.7%... 107 ------- Net assets--100.0%.............................. $14,436 ======= See accompanying Notes to Financial Statements. 24 Semi-Annual Report June 30, 2004 [PHOTO] GREIG W. George Greig - -------------------------------------------------------------------------------- INTERNATIONAL GROWTH FUND - -------------------------------------------------------------------------------- The International Growth Fund invests primarily in common stocks of foreign growth companies of all sizes. - -------------------------------------------------------------------------------- AN OVERVIEW FROM THE PORTFOLIO MANAGER - -------------------------------------------------------------------------------- How did the Fund perform in the first half of the year? How did the Fund's performance compare to its benchmark? The International Growth Fund posted a 2.95% gain (Class N Shares) for the six months ended June 30, 2004. By comparison, the Fund's benchmark, the MSCI All Country World (Free) except US Index, rose 4.10%. What were the most significant factors impacting Fund performance? What factors were behind the Fund's underperformance versus the benchmark? The overall MSCI All Country World (Free) except US index fell modestly (0.69)% during the second quarter, but a more severe correction in Asian markets and in cyclical sectors globally impacted our relative performance. On a regional basis, our relative emphasis on Asia (particularly emerging Asia) at the expense of Europe accounted for all of the portfolio's performance shortfall at mid-year. Asian markets continue to be viewed as extremely sensitive to global liquidity and cyclical growth, but it is worth noting that there has been no evidence of any significant slowdown in either economic growth or corporate earnings up to this point. The year started with international markets extending the strong rally that began in 2003 into the first quarter. Broadly speaking, Asian markets and emerging markets more generally outperformed, and small companies continued to outpace large blue chip companies. Within that framework, however, shifting returns reflected new data about the changing dynamic of the global growth cycle. The major new trend to emerge in the first quarter was the increasing strength of Japan, both in economic and market terms. After lagging the rest of the world early in the year, Japan came to life as more and more indicators pointed to continued strong earnings growth and increasing confidence in the economy. Our portfolio benefited from being overweight the benchmark in Japan, but relative returns were impacted by our emphasis on export-oriented sectors. The global equity market climate shifted during the second quarter, as heightened concern about monetary tightening in the US and a state-directed slowdown in China focused attention on potential risks to economic and profit growth, particularly in cyclical sectors and regions. What sectors had the biggest impact on portfolio performance? Technology was the major laggard on a global basis during the second quarter, reversing some of 2003's strong gains as cyclical concerns arose regarding potential oversupply of components and the sustainability of corporate and consumer spending growth in a variety of hardware categories. Conversely, the best performing sector in the global market was Energy, and portfolio positioning in these sectors also detracted from performance. June 30, 2004 William Blair Funds 25 The portfolio continues to carry relatively low exposure to Europe, a position that helped returns during the first quarter, as growth indicators remain inconsistent and relatively weak in most European economies. What is your outlook for the international markets? In both of the recent broad global economic cycles (1981-1990 and 1991-2000) there was a sharp recovery, followed by a moderation of growth accompanied by some monetary tightening. In each case the initial tightening occurred in the '4' year (1984, 1994), and so the analogy is drawn that after the liquidity-driven upturn of 2003, we should anticipate upward pressure on interest rates, and that China and the US--the engines of global growth--could slow significantly. Leading economic indicators, many of them monetary, have indeed slowed on a global basis, and some measures of investment spending and credit growth have decelerated in China. While it is still too early to tell definitively how mild or severe the coming slowdown will be, markets have readily anticipated a relatively bearish scenario. Ironically, until there is clearer evidence of the extent and effects of the slowdown, markets may overreact on the basis of fear of the unknown. Our view of the mid-cycle plateau is that it may well be milder and briefer than the tightening cycle of 1994-95. There are few excesses in the global economic picture and a diminished likelihood of instability in emerging markets. As Asia cools down and Europe begins to reaccelerate, global growth should move into better balance for the remainder of the economic expansion. 26 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- International Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Performance Highlights - -------------------------------------------------------------------------------- Annual Total Return ---------------------------------------------------- 6/30/2004(a) 2003 2002 2001 2000 1999 ------------ ----- ------ ------ ------ ----- International Growth Fund Class N.... 2.95% 42.21% (15.18)% (13.66)% (8.10)% 96.25% International Growth Fund Class I.... 3.13 42.42 (14.94) (13.43) (7.87) 41.71(a)(b) Morgan Stanley Capital--International (MSCI) All Country World Free Ex-U.S. Index....................... 4.10 41.41 (14.67) (19.50) (15.09) 30.91 Lipper International Index........... 3.86 36.00 (13.84) (19.34) (14.72) 37.83 -------------------------------------- Average Annual Total Return at 6/30/2004 -------------------------------------- Since 1 Year 3 Year 5 Year 10 Year Inception ------ ------ ------ ------- --------- International Growth Fund Class N 31.75% 5.37% 8.88% 10.32% -- International Growth Fund Class I 32.14 5.65 -- -- 7.54%(c) ------------------------------------------------------------------ (a)Total return is not annualized for periods that are less than a full year. (b)For the period from October 1, 1999 (Commencement of the Class) to December 31, 1999. (c)For the period from October 1, 1999 to June 30, 2004. Illustration of an assumed investment of $10,000 with reinvestment of capital gain distributions and income dividends [CHART] International Growth Fund MSCI AC WLD Lipper Int'l Class N Ex-US Index Index 1993 $10,000 $10,000 $10,000 1994 10,000 10,700 9,900 1995 10,700 11,700 10,900 1996 11,800 12,500 12,500 1997 12,800 12,800 13,400 1998 14,300 14,600 15,100 1999 28,000 19,100 20,800 2000 25,700 16,200 17,700 2001 22,200 13,100 14,300 2002 18,800 11,200 12,300 2003 26,800 15,800 16,800 6/04 27,600 16,400 17,400 Past performance does not guarantee future results and current performance may be lower or higher than the data quoted. Total returns shown assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. For the most current month-end performance information, please call 1-800-742-7272, or visit our Web site at www.williamblairfunds.com. International investing involves special risk considerations, including currency fluctuations, lower liquidity, economic and political risk. Class N shares are available to the general public without a sales load. The performance highlights and graph presented above do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The Morgan Stanley Capital International (MSCI) All Country World Free ex-U.S. Index is an unmanaged index that includes developed and emerging markets and reduced Japanese portion, making it more comparable to the International Growth Fund in terms of investment approach. The Lipper International Index is a composite of international growth mutual funds. This report identifies the Fund's investments on June 30, 2004. These holdings are subject to change. Not all stocks in the Fund performed the same, nor is there any guarantee that these stocks will perform as well in the future. Market forecasts provided in this report may not necessarily come to pass. June 30, 2004 William Blair Funds 27 - -------------------------------------------------------------------------------- International Growth Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) - ------------------------------------------------------- -------- Shares Value - ---------- -------------------------------------------- -------- Common Stocks--Europe--24.5% Austria--1.3% 211,500 Erste Bank Der Oester (Banking)............. $ 33,350 -------- Estonia--0.2% 731,560 Hansabank (Banking)......................... 6,178 -------- Finland--0.5% 136,300 Nokian Renkaat Oyj (Automotive)............. 13,324 -------- France--4.6% 376,204 Christian Dior (Apparel and luxury goods)... 24,472 119,500 Hermes International SCA (Apparel and luxury goods)..................................... 24,016 1,139,100 *JC Decaux (Media).......................... 24,518 185,200 Klepierre (Real estate)..................... 12,709 183,397 Mr. Bricolage SA (Home improvement--retail)....................... 6,052 407,368 *Opera (Hospital and nursing management).... 10,525 81,982 Rodriquez Group (Retail trade).............. 4,307 152,900 Sanofi-Synthelabo SA (Pharmaceuticals)...... 9,712 -------- 116,311 -------- Germany--4.7% 575,000 Bayer Motoren Werke (Motor vehicles)........ 25,648 223,561 Did Deutscher Industrie Svc (Commercial services).................................. 6,583 211,000 GFK AG (Commercial services)................ 7,424 66,800 Puma AG (Consumer non-durables)............. 17,116 367,200 SAP AG (Software)........................... 61,319 -------- 118,090 -------- Greece--2.3% 1,031,700 Coca-Cola Hellenic Bottling S.A. (Beverages)................................ 24,215 548,800 EFG Eurobank (Banking)...................... 12,013 364,100 Folli Follie S.A. (Apparel and footwear retailer).................................. 11,659 530,920 National Bank of Greece (Banking)........... 11,607 -------- 59,494 -------- Ireland--1.0% 1,020,200 Anglo Irish Bank plc (Finance).............. 16,029 1,123,600 *Grafton Group (Wholesale distributors)..... 8,987 -------- 25,016 -------- Italy--2.4% 1,797,700 Banco Popolare Di Verona E N (Banking)...... 31,019 1,260,800 Credito Emiliano SpA (Banking).............. 10,402 559,584 Merloni Elettrodemestici SpA (Electronics and appliances)............... 9,994 249,852 Pirelli & C Real Estate (Real estate development)............................... 9,390 -------- 60,805 -------- Spain--1.2% 267,700 Banco Popular Espanol (Banking)............. 15,148 358,400 Grupo Ferrovial S.A. (Industrial services).. 14,963 -------- 30,111 -------- Sweden--2.1% 13,200,000 *Ericsson LM-B Shares (Communications equipment)................................. 39,490 - -------------------------------------------------------- -------- Shares Value - ---------- --------------------------------------------- -------- Common Stocks--Europe--24.5%--(continued) 616,800 Gunnebo AB (Producer manufacturing).......... $ 6,997 190,500 *Oriflame Cosmetics S.A. SDR (Household products)................................... 6,806 -------- 53,293 -------- Switzerland--4.2% 96,900 *Actelion (Biotechnology).................... 11,172 244,300 *Logitech International S.A. (Electronic technology)................................. 11,183 156,850 *Micronas Semiconductor (Electronic technology)................................. 7,168 39,100 Serono S.A., Class "B" (Biotechnology)....... 24,717 741,800 UBS AG (Banking)............................. 52,591 -------- 106,831 -------- United Kingdom--19.7% 1,280,700 *Acambis (Biotechnology)..................... 8,103 477,800 Astrazeneca plc (Pharmaceuticals)............ 21,583 7,132,300 BG Group plc (Industrial services)........... 44,185 4,023,300 *British Sky Broadcasting Group (Media)...... 45,607 4,336,900 Capita Group plc (Commercial services)....... 25,216 844,600 Carnival plc (Hotels, restaurants and leisure activities)................................. 41,257 1,571,800 Cattle's Holdings plc (Finance and leasing).. 9,096 486,300 Cobham plc (Aerospace and defense)........... 12,395 3,496,200 Compass Group plc (Hotels, restaurants and leisure activities)......................... 21,501 961,000 French Connection (Apparel and footwear retail)..................................... 7,279 1,983,100 HBOS plc (Finance)........................... 24,736 652,700 MAN Group plc (Finance)...................... 17,012 695,300 McCarthy & Stone plc (Real estate)........... 7,370 5,209,700 *Michael Page International (Personnel Services)................................... 17,024 655,400 Next plc (Multiline retail).................. 17,022 2,762,600 Premier Farnell (Electronics distributors)... 12,399 1,372,200 Reckitt Benckiser plc (Household products)... 39,113 2,770,000 Smith & Nephew plc (Health care equipment and supplies)............................... 30,038 2,193,600 Standard Chartered plc (Banking)............. 35,945 10,709,500 Tesco plc (Food retailer).................... 52,051 804,500 Warner Chilcott plc (Pharmaceuticals)........ 10,163 -------- 499,095 -------- Canada--5.8% 632,900 *Alimentation Couche-Tard--Class "B" (Food retail)............................... 11,073 447,700 *Cognos Inc. (Software)...................... 16,152 180,800 *MacDonald Dettwiler & Associates (IT consulting)............................. 3,519 1,281,600 Manulife Financial Corp. (Life and health insurance)........................... 51,861 294,000 *Precision Drilling Corp. (Drilling)......... 14,028 234,800 *Research in Motion Ltd. (Wireless telecommunication).......................... 16,081 477,300 *Shoppers Drug Mart Corp. (Retail trade)..... 11,935 883,300 Suncor Energy, Inc. (Energy minerals)........ 22,491 -------- 147,140 -------- Japan--24.5% 230,500 Aeon Credit Service Co., Ltd. (Consumer finance).......................... 15,463 199,300 Aeon Mall Co., Ltd. (Real estate)............ 11,902 See accompanying Notes to Financial Statements. 28 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- International Growth Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) - ---------- ----------------------------------------------- -------- Shares Value - ---------- ----------------------------------------------- -------- Common Stocks--Japan--24.3%--(continued) 194,000 Arnest One Corp. (Real estate)................. $ 5,894 168,300 Askul Corporation (Retail trade)............... 10,624 944,400 Canon, Inc. (Office electronics)............... 50,437 1,848,000 *Chiyoda Corp. (Construction).................. 13,251 60,200 Don Quijote Co., Ltd. (Multiline retail)....... 3,840 336,800 Fast Retailing (Specialty retail).............. 27,513 3,408,500 Hino Motors Ltd. (Trucks, construction and farm machinery).................................... 24,834 294,000 Hoya Corporation (Electronic technology)....... 31,005 145,900 Kappa Create Co., Ltd. (Consumer non-durables)................................. 10,126 137,560 Keyence Corporation (Electronic technology).... 31,593 54,200 Koha Co., Ltd. (Electronic equipment and instruments).................................. 2,048 304,400 Matsui Securities Co., Ltd. (Financial services)..................................... 10,509 372,250 Misumi Corp. (Trading companies and distributors)................................. 12,247 5,424 Mitsubishi Tokyo Financial (Banking)........... 50,775 112,000 Nakanishi Inc. (Medical specialties)........... 8,032 217,000 Neomax Co., Ltd. (Electronic equipment and instruments).................................. 3,537 243,600 Nidec Corporation (Electronic equipment and instruments).................................. 25,151 202,060 Nitori Company Ltd. (Specialty stores)......... 12,701 509,600 Nitto Denko Corporation (Electronic technology) 26,331 321,000 Orix Corporation (Consumer finance)............ 37,046 274,600 Park 24 Co., Ltd. (Commercial services)........ 10,506 3,105 Pasona Inc. (Personnel services)............... 11,157 299,700 Point Inc. (Apparel and footwear retail)....... 8,140 189,100 Sawai Pharmaceutical Co., Ltd. (Pharmaceuticals)............................. 8,002 2,417,200 Sharp Corp. (Electronics)...................... 38,960 2,943,000 *Shinsei Bank, Ltd. (Banking).................. 18,816 214,200 SMC Corporation (Trucks, construction and farm machinery)............................... 23,373 224,500 Sugi Pharmacy (Food and staple retailing)...... 9,229 5,695,000 Sumitomo Trust & Banking Co. (Finance)......... 41,092 1,714,000 Toto Ltd. (Building products).................. 18,142 118,400 USS Co., Ltd. (Commercial services)............ 10,246 -------- 622,522 -------- Emerging Asia--7.6% China--0.4% 14,030,000 Zhejiang Expressway Holding Co. (Transportation infrastructure)............... 10,003 -------- India--3.0% 392,601 Bharat Forge Ltd. (Machinery).................. 5,239 925,600 *Biocon Ltd. (Biotechnology)................... 10,103 1,240,400 HDFC Bank (Banking)............................ 10,012 908,600 Housing Development Finance Corp. (Financial services)..................................... 10,225 171,206 Infosys Technologies, Ltd. (Consulting and software services)............................ 20,758 322,500 ING Vysya Bank, Ltd. (Banking)................. 2,598 1,447,300 *Maruti Udyog Ltd. (Automobiles)............... 12,709 854,728 Mphasis BFL, Ltd. (Information technology)..... 4,871 -------- 76,515 -------- - ---------- ------------------------------------------------ -------- Shares Value - ---------- ------------------------------------------------ -------- Emerging Asia--7.6%--(continued) Indonesia--0.8% 60,744,500 *Bank Rakyat Indonesia (Banking)................ $ 10,820 24,963,500 Unilever Indonesia Tbk (Household and personal care)................................. 10,461 -------- 21,281 -------- South Korea--2.2% 377,400 Hyundai Motor Co., Ltd. (Automobiles)........... 14,600 97,800 Samsung Electronics Co. (Semiconductors)........ 40,661 -------- 55,261 -------- Taiwan--0.9% 19,646,794 EVA Airways Corp. (Airlines).................... 8,255 4,136,800 Hon Hai Precision Industry (Computers).......... 15,480 -------- 23,735 -------- Thailand--0.3% 9,708,300 *Tisco Finance (Finance, rental and leasing).... 6,468 -------- Asia--6.0% Australia--2.6% 1,080,890 Bendigo Bank Ltd. (Banking)..................... 7,131 1,312,200 Billabong International Ltd. (Apparel and luxury goods)......................................... 7,594 663,100 Macquarie Bank, Ltd. (Financial services)....... 15,774 235,800 Perpetual Trustees Australia (Investment managers)...................................... 7,763 1,578,831 Sigma Company, Ltd. (Medical distributors)...... 9,060 2,308,900 Toll Holdings, Ltd. (Trucking).................. 17,338 -------- 64,660 -------- Hong Kong--3.0% 16,510,000 China Insurance International (Insurance)....... 7,352 71,262,000 Cnooc Ltd. (Oil and gas)........................ 30,209 2,887,500 Esprit Holdings Ltd. (Apparel, footwear and retail)........................................ 12,960 7,775,000 Global Bio-Chem Technol (Food products)......... 4,431 5,949,000 Li & Fung (Distribution services)............... 8,736 7,858,200 Techtronic Industries Co. (Consumer durables)...................................... 12,579 -------- 76,267 -------- Singapore--0.4% 8,482,800 Osim International Ltd. (Consumer sundries)..... 5,260 6,582,000 Unisteel Technology, Ltd. (Electronic components).................................... 5,114 -------- 10,374 -------- Latin America--3.8% Brazil--0.3% 404,400 *Natura Cosmeticos S.A. (Cosmetics)............. 6,502 -------- Chile--1.2% 412,900 *Cencosud S.A.--ADR 144A (Retail stores)........ 7,642 675,400 Lan Chile S.A.--ADR (Airlines).................. 13,035 4,567,464 S.A.C.I. Falabella (Department stores).......... 8,988 -------- 29,665 -------- Mexico--2.3% 15,184,400 America Movil S.A. (Communications)............. 27,636 2,024,800 *Consorcio Ara S.A (Homebuilding)............... 5,840 1,648,000 *Urbi Desarrollos Urbanos S.A. (Household durables)...................................... 5,311 6,139,000 Walmart de Mexico (Retail trade)................ 18,239 -------- 57,026 -------- See accompanying Notes to Financial Statements. June 30, 2004 William Blair Funds 29 - -------------------------------------------------------------------------------- International Growth Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) - ----------- ---------------------------------------- ---------- Shares Value - ----------- ---------------------------------------- ---------- Emerging Europe, Mid-East, Africa--3.7% Egypt--0.7% 744,000 Orascom Construction Industry (Construction)......................... $ 11,044 851,000 *Orascom Telecommunication Holding GDR (Telecommunications)................... 7,880 ---------- 18,924 ---------- Israel--0.9% 360,100 Teva Pharmaceutical Inds.--ADR (Pharmaceuticals)...................... 24,231 ---------- Poland--0.4% 292,744 Bank Pekao S.A. (Banking)............... 9,829 ---------- South Africa--1.3% 414,963 Edgars Consolidated Stores (Apparel, footwear and retail)................... 9,972 3,120,700 *MTN Group Ltd. (Telecommunication services).............................. 14,441 11,312,500 Network Healthcare Holdings (Health services).............................. 8,174 ---------- 32,587 ---------- Turkey--0.4% 463,403,928 * Enka Insaat (Industrial conglomerates) 9,523 ---------- Total Common Stock--95.6% (cost $2,006,237).................................. 2,424,411 ---------- - ---------- * Non-income producing securities ADR = American Depository Receipt GDR = Global Depository Receipt All securities excluding those traded on exchanges in this hemisphere, are fair valued pursuant to Valuation Procedures adopted by the Board of Trustees. - ----------- --------------------------------- ---------- Shares or Principal Amount Value - --------------------------------------------- ---------- Preferred Stock Brazil--1.4% 243,070,000 Banco Itau Holding (Banking)..... $ 22,408 979,620 Geradau S.A. (Steel)............. 11,738 ---------- Total Preferred Stock--1.4% (cost $27,753).............................. 34,146 ---------- Investment in Affiliate 23,482,852 William Blair Ready Reserves Fund 23,483 ---------- Total Investments in Affiliate--0.9% (cost $23,483) 23,483 ---------- Short-Term Investments 27,746,000 American Express Demand Note, VRN 1.17% due 7/1/04................ 27,746 ---------- Total Short-term Investments--1.1% (cost $27,746).............................. 27,746 ---------- Total Investments--99.0% (cost $2,085,219)........................... 2,509,786 Cash and other assets, less liabilities--1.0% 26,532 ---------- Net assets--100.0%........................... $2,536,318 ========== See accompanying Notes to Financial Statements. 30 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- International Growth Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) At June 30, 2004 the Fund's Portfolio of Investments includes the following industry categories: Financials................ 26.8% Consumer Discretionary.... 21.4% Information Technology.... 15.4% Industrials and Services.. 12.0% Healthcare................ 7.9% Consumer Staples.......... 7.8% Energy.................... 4.5% Telecommunication Services 2.7% Materials................. 1.5% ------ 100.0% ====== At June 30, 2004 the Fund's Portfolio of Investments includes the following currency categories: Japanese Yen.......... 25.3% British Pound Sterling 20.3% Euro.................. 18.8% Canadian Dollar....... 6.0% Swiss Franc........... 4.4% Hong Kong Dollar...... 3.5% Indian Rupee.......... 3.1% Australian Dollar..... 2.6% Mexico Nuevo Peso..... 2.3% South Korean Won...... 2.3% Swedish Krona......... 2.2% United States Dollar.. 2.1% Brazilian Real........ 1.7% South African Rand.... 1.3% All other currencies.. 4.1% ------ 100.0% ====== See accompanying Notes to Financial Statements. June 30, 2004 William Blair Funds 31 [PHOTO] GREIG W. George Greig - -------------------------------------------------------------------------------- INTERNATIONAL EQUITY FUND - -------------------------------------------------------------------------------- The International Equity Fund invests primarily in common stocks of large and medium-sized companies included in the Morgan Stanley Capital International All Country World ex-U.S. Index. - -------------------------------------------------------------------------------- AN OVERVIEW FROM THE PORTFOLIO MANAGER - -------------------------------------------------------------------------------- We are pleased to have the International Equity Fund become the newest addition to the William Blair Fund Family and would like to thank our shareholders for investing with us. The International Equity Fund commenced operations on May 24, 2004. Through the period ended June 30, 2004, the Fund posted a gain of 5.60%, just ahead of the 5.18% increase in the Fund's benchmark, the MSCI All Country World (Free) except US Index, for this brief period. I am very enthusiastic about the investment opportunities available to the International Equity Fund. As you may already know, the Fund will primarily invest in large and medium-sized companies in developed market economies and to a limited extent in small-sized companies and Emerging Markets countries. Our investment process seeks to find high quality growth companies for the International Equity Fund's portfolio of investments. These are companies that historically have had superior growth, profitability and quality relative to local markets and relative to companies within the same industry worldwide, and that are expected to continue such performance. In terms of growth, we aim to find companies that have the capability of growing in real terms at least twice the economic growth rate of the markets in which they participate. In terms of quality, we seek to invest in companies with strong management, proprietary market positions, strong asset bases and solid financial characteristics. International Outlook: Moving Toward Mid-Cycle In both of the recent broad global economic cycles (1981-1990 and 1991-2000) there was a sharp recovery, followed by a moderation of growth accompanied by some monetary tightening. In each case the initial tightening occurred in the '4' year (1984, 1994), and so the analogy is drawn that after the liquidity-driven upturn of 2003, we should anticipate upward pressure on interest rates, and that China and the US--the engines of global growth--could slow significantly. Leading economic indicators, many of them monetary, have indeed slowed on a global basis, and some measures of investment spending and credit growth have decelerated in China. While it is still too early to tell definitively how mild or severe the coming slowdown will be, markets have readily anticipated a relatively bearish scenario. Ironically, until there is clearer evidence of the extent and effects of the slowdown, markets may overreact on the basis of fear of the unknown. Our view of the mid-cycle plateau is that it may well be milder and briefer than the tightening cycle of 1994-95. There are few excesses in the global economic picture and a diminished likelihood of instability in emerging markets. As Asia cools down and Europe begins to reaccelerate, global growth should move into better balance for the remainder of the economic expansion. 32 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- International Equity Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) - ------------------------------------------------------ ----- Shares Value - ------ ----------------------------------------------- ----- Common Stocks--Europe--31.2% Austria--2.7% 600 Erste Bank Der Oester (Banking)................ $ 95 ---- France--2.3% 400 Hermes International (Apparel and luxury goods) 80 ---- Germany--11.5% 2,100 Bayer Motoren Werke (Motor vehicles)........... 94 300 Puma AG (Consumer non-durables)................ 77 800 SAP AG (Software and programming).............. 134 8,200 *T-Online International AG (Information technology)................................... 94 ---- 399 ---- Greece--1.8% 2,900 EFG Eurobank Egrasias (Banking)................ 63 ---- Ireland--1.7% 3,800 Anglo Irish Bank plc (Finance)................. 60 ---- Italy--2.8% 5,700 Banco Popolare di Verona E N (Banking)......... 98 ---- Spain--1.8% 1,500 Grupo Ferrovial S.A. (Industrial services)..... 63 ---- Sweden--3.8% 44,000 *Ericsson (Communications equipment)........... 132 ---- Switzerland--2.8% 150 Serono S.A (Biotechnology)..................... 95 ---- United Kingdom--21.9% 15,200 BG Group plc (Industrial services)............. 94 8,100 *British Sky Broadcasting Group (Media)........ 92 3,300 *Cairn Energy plc (Energy)..................... 85 10,900 Capita Group plc (Commercial services)......... 63 3,500 Next (Multiline retail)........................ 91 2,700 Premier Farnell (Electronics distributors)..... 12 3,400 Reckitt Benckiser plc (Household products)..... 97 8,700 Smith & Nephew (Healthcare equipment and supplies)..................................... 94 26,900 Tesco plc (Food retailer)...................... 131 ---- 759 ---- Canada--5.7% 2,400 Manulife Financial Corp. (Life and health insurance).................................... 97 1,000 *Research in Motion Ltd. (Wireless telecommunication)............................ 69 1,300 Suncor Energy, Inc. (Energy minerals).......... 33 ---- 199 ---- - ---------- * Non-income producing securities ADR = American Depository Receipt + = U.S. listed foreign security All securities excluding those traded on exchanges in this hemisphere, are fair valued pursuant to Valuation Procedures adopted by the Board of Trustees. - ------------------------------------------------------- -------- Shares or Principal Amount Value - ------------------------------------------------------- -------- Common Stocks--(continued) Japan--18.2% 1,800 Canon, Inc. (Office electronics)............... $ 96 800 Fast Retailing Co. Ltd. (Specialty retail)..... 65 10,000 Hino Motors Ltd. (Trucks, construction and farm machinery).................................... 73 800 Hoya Corporation (Electronic technology)....... 84 300 Keyence Corporation (Electronic technology).... 69 1,100 Nitto Denko Corporation (Electronic technology)................................... 57 5,000 Sharp Corp. (Electronics)...................... 81 15,000 Sumitomo Trust & Banking Co. (Finance)......... 108 -------- 633 -------- Asia--3.7% Australia--1.8% 2,600 Macquarie Bank, Ltd. (Financial services)...... 62 -------- Hong Kong--1.9% 14,500 Esprit Holdings (Apparel, footwear and retail). 65 -------- Latin America--1.8% Mexico--1.8% 34,800 America Movil S.A. (Communications)............ 63 -------- Emerging Europe, Mid-East, Africa--3.8% Israel--1.7% 900 Teva Pharmaceutical Inds.--ADR (Pharmaceuticals)............................. 60 -------- South Africa--2.1% 10,300 Standard Bank Group Ltd. (Banking)............. 72 -------- Total Common Stock--86.3% (cost $2,816)......................................... 2,998 -------- Investment in Affiliate 336,121 William Blair Ready Reserves Fund.............. 336 -------- Total Investment in Affiliate--9.7% (Cost $336) 336 -------- Short-Term Investments 141,000 American Express Demand Note, VRN 1.17% due 7/1/04.............................. 141 -------- Total Short-term Investments--4.0% (cost $141)........................................... 141 -------- Total Investments--100.0% (cost $3,293)......................................... 3,475 Liabilities, plus cash and other assets--0.0%.......... (1) -------- Net assets--100.0%..................................... $ 3,474 ======== See accompanying Notes to Financial Statements. June 30, 2004 William Blair Funds 33 - -------------------------------------------------------------------------------- International Equity Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) At June 30, 2004, the Fund's Portfolio of Investments includes the following industry categories: Financials................ 21.9% Consumer Discretionary.... 21.5% Information Technology.... 20.7% Healthcare................ 8.3% Consumer Staples.......... 7.6% Energy.................... 7.1% Industrials............... 6.6% Telecommunication Services 4.4% Materials................. 1.9% ------ 100.0% ====== At June 30, 2004 the Fund's Portfolio of Investments includes the following currency categories: Euro.................. 28.6% British Pound Sterling 25.3% Japanese Yen.......... 21.1% Canadian Dollar....... 6.6% Swedish Krona......... 4.4% Swiss Franc........... 3.2% South African Rand.... 2.4% Hong Kong Dollar...... 2.2% Mexico Nuevo Peso..... 2.1% Australian Dollar..... 2.1% United States Dollar.. 2.0% ------ 100.0% ====== See accompanying Notes to Financial Statements. 34 Semi-Annual Report June 30, 2004 [PHOTO] MITCHEL David S. Mitchell [PHOTO] PRICE Capucine "Cappy" Price - -------------------------------------------------------------------------------- VALUE DISCOVERY FUND - -------------------------------------------------------------------------------- The Value Discovery Fund invests in small companies that we believe offer a long-term investment value. We do this by seeking to identify undervalued companies with sound business fundamentals--"broken stocks not broken companies." - -------------------------------------------------------------------------------- AN OVERVIEW FROM THE PORTFOLIO MANAGERS - -------------------------------------------------------------------------------- How did the Fund perform in the first half of the year? How did the Fund's performance compare to its benchmark? The Value Discovery Fund posted a 5.25% gain on a total return basis (Class N shares) during the six months ended June 30, 2004. By comparison, the Fund's primary benchmark, the Russell 2000(R) Index, rose 6.76%, while the Russell 2000(R) Value Index, increased 7.83%. What were the most significant factors impacting Fund performance? What factors were behind the Fund's underperformance versus the benchmark? At mid-year, our results lagged the benchmark. Underperformance resulted primarily from earnings' disappointments either in actual reported or lower than expected guidance. As the economy has improved and valuations have become richer, the market is much less forgiving of companies that are not delivering results here and now. That being said, earnings misses due to near term inability to recapture spikes in raw material prices (as evidenced in steel, copper, gas, and numerous food commodities) are much more likely to be overcome than those driven by weaker-than-expected demand or an increasingly difficult competitive environment. Which investment strategies enhanced the Fund's return? What were among the best performing sectors for the Fund? Within the portfolio, three sectors stood out from a positive relative contribution perspective during the first half of the year: Other Energy, Producer Durables and Autos and Transportation. Other Energy was the best-performing sector in both absolute and contribution terms during the first half of the year. Veritas, a provider of geophysical studies and exploration services to the petroleum industry, was the top performer. Veritas posted strong year-to-date figures, reflecting an upsurge in demand for their services. Consol Energy, a multi-fuel (coal and gas) energy producer, also posted strong results, reflecting solid performance by its core businesses. Producer Durables was the second-best-performing sector in absolute terms. Performance was driven primarily by Pentair. Historically, Pentair has operated in three business segments: Tools, Water and Enclosures. The marketplace responded favorably to Pentair's announcement to divest itself from its lower-margin tool business to Black & Decker. Additionally, Pentair made an advantageous acquisition of a water technology company. Stock selection was the primary driver of out-performance for our holdings in the Autos and Transportation sector. Landstar System, a transportation services company that provides truckload carrier services, inter-modal transportation services, and expedited air and truck services to shippers, reflected strong revenue growth driven by increasing demand for shipping services. (We have since exited the stock entirely due to valuation.) SCS June 30, 2004 William Blair Funds 35 Transportation, a provider of regional and interregional less-than-truckload and selected truckload service, reported an 89% first quarter year-over-year earnings increase citing an increase in operational efficiency, an enhancement in revenues, as well as an improving economy. What were among the weakest performing sectors for the Fund? During the first half of the year, three sectors stood out as detractors from performance: Health Care, Consumer Staples, and Technology. Within the Healthcare sector, First Health Group, a provider of PPO services, clinical cost management, and fee schedule/cost management services, missed analysts' earnings expectations, citing increased competition among health plans trying to gain market share. The lion's share of the shortfall in the Consumer Staples sector came from Interstate Bakeries. Interstate Bakeries is the largest wholesale baker and distributor of fresh baked bread and sweet goods in the U.S. Year to date, Interstate Bakeries has suffered amid the popularity of the current low-carbohydrate diet fads, coupled with rising prices in food commodities such as eggs. Within the Technology sector, Overland Storage, a designer and manufacturer of magnetic tape data storage systems cut its revenue guidance during the first half of the year, pointing to lower-than-expected original equipment manufacturer revenue. This appears to be a function of supply chain management changes at its largest customer, Hewlett Packard, as opposed to weakening end market demand. Are there any specific investments you would like to highlight? Examples of some of the positions that were added to the Fund's portfolio of investments in recent months include the following: .. Nautilus Group is a marketer, developer and manufacturer of branded health and fitness products sold under such names as Nautilus, Bowflex, TreadClimber, Schwinn, StairMaster and Trimline. We are enthusiastic with this "turnaround" story, as Nautilus introduces new products and redirects their marketing focus to the retail channel. .. Spatialight develops, designs, manufactures and markets miniature high-resolution active matrix liquid crystal displays for computer, video and other applications. We expect Spatialight to greatly benefit from the migration to high-definition video equipment. .. Restoration Hardware is a retailer of home furnishings, functional and decorative hardware and related merchandise. We are impressed with the vision new senior management brings to this company to increase sales and margins. .. General Cable is engaged in the development, design, manufacturing, marketing and distribution of copper, aluminum and fiber-optic wire and cable products. This company is well poised to lead the way as the wire and cable industry recovers and construction and infrastructure spending and demand increases. The following positions were eliminated during the second quarter as they achieved our price targets and we took profits re-deploying proceeds to more attractive opportunities: .. Yellow Roadway, a provider of transportation services to the less-then-truckload market throughout North America. .. Bank of Hawaii, a provider of a range of financial products and services in Hawaii and the Pacific Islands. 36 Semi-Annual Report June 30, 2004 .. NCI Building Systems, a manufacturer and marketer of building and framing systems, self-storage buildings, overhead doors and other components for the residential, commercial, industrial and agricultural markets. .. Landstar System, a transportation services company that provides truckload carrier services, inter-modal transportation services, and expedited air and truck services to shippers. What is your current strategy? How is the Fund positioned? Despite lagging the benchmark near-term, early returns from the earnings season subsequent to quarter end are running positive and we have taken multiple opportunities to re-deploy profits into more attractive expected returns both within and previously outside the portfolio. A combination of inflationary pressure, uncertainty regarding the upcoming election, and a slow-down in mutual funds cash inflows continues to contribute to excessive market volatility. Market turmoil creates opportunity and we diligently work to uncover companies benefiting from short-term neglect or undervaluation. We continue to emphasize companies with strong managements, solid financials, and competitive positions that should experience earnings growth in even modest economic expansion. June 30, 2004 William Blair Funds 37 - -------------------------------------------------------------------------------- Value Discovery Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Performance Highlights - -------------------------------------------------------------------------------- Annual Total Return -------------------------------------- 6/30/2004(a) 2003 2002 2001 2000 1999 ------------ ----- ------ ----- ----- ----- Value Discovery Fund Class N 5.25% 39.31% (10.70)% 17.39% 18.85% 6.10% Value Discovery Fund Class I 5.36 39.55 (10.34) 17.72 19.16 11.81(a)(b) Russell 2000(R) Index....... 6.76 47.25 (20.48) 2.49 (3.02) 21.26 Russell 2000(R) Value Index. 7.83 46.03 (11.43) 14.03 22.83 (1.49) -------------------------------------- Average Annual Total Return at 6/30/2004 -------------------------------------- Since 1 Year 3 Year 5 Year Inception ------ ------ ------ --------- Value Discovery Fund Class N 31.73% 9.69% 13.11% 13.57%(c) Value Discovery Fund Class I 31.98 9.97 -- 16.40(b) ------------------------------------------------------------------ (a)Total return is not annualized for periods that are less than a full year. (b)For the period from October 1, 1999 (Commencement of the Class) to December 31, 1999. (c)For the period from December 23, 1996 (Commencement of the Class) to June 30, 2004. Illustration of an assumed investment of $10,000 with reinvestment of capital gain distributions and income dividends [CHART] Value Russell Russell Discovery 2000(R) 2000(R) Fund Class N Index Value 12/96 $10,000 $10,000 $10,000 12/97 13,300 12,200 13,200 12/98 13,400 11,900 12,300 12/99 14,300 14,500 12,100 12/00 16,900 14,000 14,900 12/01 19,900 14,400 17,000 12/02 17,800 11,400 15,100 12/03 24,800 16,800 22,000 6/04 26,000 18,000 23,700 Past performance does not guarantee future results and current performance may be lower or higher than the data quoted. Total returns shown assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. For the most current month-end performance information, please call 1-800-742-7272, or visit our Web site at www.williamblairfunds.com. Investing in smaller companies involves special risks, including higher volatility and lower liquidity. From time to time, the investment adviser may waive fees or reimburse expenses for the Fund. Without these waivers, performance would be lower. Class N shares are available to the general public without a sales load. The performance highlights and graph presented above do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The Russell 2000(R) Index is the Fund's primary benchmark. The Russell 2000(R) Index is unmanaged composite of the smallest 2000 stocks of the Russell 3000 Index. The Russell 2000(R) Value Index consists of small-capitalization companies with below average price-to-book ratios and forecasted growth rates. This report identifies the Fund's investments on June 30, 2004. These holdings are subject to change. Not all stocks in the Fund performed the same, nor is there any guarantee that these stocks will perform as well in the future. Market forecasts provided in this report may not necessarily come to pass. 38 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Value Discovery Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) - ----------------------------------------------- -------- Shares Value - ------- --------------------------------------- -------- Common Stocks Financial Services--21.7% 114,100 Agree Realty Corporation............... $ 2,887 234,905 American Financial Realty Trust........ 3,357 132,790 AmerUs Group, Class "A"................ 5,498 65,810 Astoria Financial Corporation.......... 2,407 103,585 Brandywine Realty Trust................ 2,816 49,436 City Bank (Lynnwood, WA)............... 1,583 130,655 Donegal Group, Inc., Class "A"......... 2,618 86,085 First Financial Holdings, Inc.......... 2,480 225,985 *Franklin Bank Corporation............. 3,575 583,750 *Meadowbrook Insurance Group, Inc...... 3,094 232,610 National Financial Partners Corporation 8,204 130,020 Ryder System, Inc...................... 5,210 329,220 *U.S.I. Holdings Corporation........... 5,202 309,080 *United Rentals, Inc................... 5,529 260,390 Winston Hotels, Inc.................... 2,695 -------- 57,155 -------- Consumer Discretionary--21.6% 208,910 *BJ's Wholesale Club, Inc.............. 5,223 198,621 Cadmus Communications Corporation...... 2,930 142,280 Christopher & Banks Corporation........ 2,520 391,590 *Elizabeth Arden, Inc.................. 8,239 77,140 Ethan Allen Interiors Inc.............. 2,770 126,340 *Heidrick & Struggles International.... 3,750 343,335 *K2, Inc............................... 5,390 50,855 Michaels Stores, Inc................... 2,797 144,195 Nautilus Group, Inc.................... 2,813 211,100 *Navigant Consulting, Inc.............. 4,526 310,515 *Prime Hospitality Corporation......... 3,298 404,605 *Restoration Hardware, Inc............. 2,958 86,345 *Sharper Image Corporation............. 2,710 142,450 *Tech Data Corporation................. 5,574 178,800 *Whitehall Jewellers, Inc.............. 1,337 -------- 56,835 -------- Materials and Processing--14.0% 91,865 Boise Cascade Corporation.............. 3,458 196,645 Ferro Corporation...................... 5,246 632,505 *GrafTech International Ltd............ 6,616 138,475 *Jones Lang LaSalle, Inc............... 3,753 342,976 LSI Industries, Inc.................... 3,944 557,280 Polyone Corporation.................... 4,146 140,830 Spartech Corporation................... 3,653 214,430 Watsco, Inc............................ 6,019 -------- 36,835 -------- Technology--9.0% 193,902 Avnet, Inc............................. 4,402 553,490 *Borland Software Corporation.......... 4,699 197,975 *Checkpoint Systems, Inc............... 3,550 258,200 *Overland Storage, Inc................. 3,431 167,410 *SPSS, Inc............................. 3,008 471,022 *Tier Technologies, Inc., Class "B".... 4,588 -------- 23,678 -------- Other Energy--7.7% 167,156 Consol Energy, Inc..................... 6,018 192,250 *Forest Oil Corporation................ 5,334 - ---------- * Non-income producing ** = Fair Valued pursuant to Valuation Procedures adopted by the Board of Trustees. ADR= American Depository Receipt - ----------------------------------------------- -------- Shares or Principal Amount Value - ----------------------------------------------- -------- Common Stocks--(continued) Other Energy--(continued) 468,530 *Newpark Resources, Inc................ $ 2,905 258,075 *Veritas DGC, Inc...................... 5,974 -------- 20,231 -------- Health Care--7.2% 206,275 *Albany Molecular Research............. 2,667 184,210 Alpharma, Inc., Class "A".............. 3,773 480,965 *Discovery Partners International, Inc. 2,453 525,435 *Encore Medical Corporation............ 3,310 160,395 *First Health Group Corporation........ 2,504 240,570 *SOLA International, Inc............... 4,145 -------- 18,852 -------- Producer Durables--7.1% 198,400 *Agco Corporation...................... 4,042 301,220 *Artesyn Technologies, Inc............. 2,711 131,315 Belden, Inc............................ 2,814 488,700 General Cable Corporation.............. 4,178 92,885 Pentair, Inc........................... 3,125 77,290 Robbins & Myers, Inc................... 1,735 -------- 18,605 -------- Consumer Staples--4.3% 492,810 *Del Monte Foods Company............... 5,007 316,725 *Interstate Bakeries Corporation....... 3,436 75,815 *Robert Mondavi Corporation, Class "A". 2,807 -------- 11,250 -------- Utilities--3.0% 194,620 Atmos Energy Corporation............... 4,980 171,090 *IDT Corporation....................... 3,085 -------- 8,065 -------- Autos and Transportation--3.0% 105,810 BorgWarner, Inc........................ 4,631 128,675 *SCS Transportation, Inc............... 3,396 -------- 8,027 -------- Consumer Cyclical--0.6% 255,655 *Spatialight, Inc...................... 1,547 -------- Total Common Stock--99.2% (cost $203,695)............................... 261,080 -------- Convertible Bonds 2,157 Midwest Express Holdings, 6.750%, due 10/1/08**................. 1,799 -------- Total Convertible Bonds--0.7% (Cost $2,157)................................. 1,799 -------- Investment in Affiliate 2,172 William Blair Ready Reserves Fund...... 2,172 -------- Total Investment in Affiliate--0.8% (cost $2,172)................................. 2,172 -------- Total Investments--100.7% (cost $208,024)............................... 265,051 Liabilities, plus cash and other assets--(0.7)% (1,837) -------- Net assets--100.0%............................. $263,214 ======== See accompanying Notes to Financial Statements. June 30, 2004 William Blair Funds 39 [PHOTO] KAPLAN James S. Kaplan [PHOTO] Chris Vincent Christopher T. Vincent - -------------------------------------------------------------------------------- INCOME FUND - -------------------------------------------------------------------------------- The Income Fund invests in intermediate-term income-producing debt securities. - -------------------------------------------------------------------------------- AN OVERVIEW FROM THE PORTFOLIO MANAGERS - -------------------------------------------------------------------------------- How did the Fund perform in the first half of the year? How did the Fund's performance compare to its benchmark? The Income Fund posted a 0.44% decrease on a total return basis (Class N Shares) for the six months ended June 30, 2004. By comparison, the Fund's benchmark, the Lehman Intermediate Government/Credit Bond Index, declined 0.11%, while the Fund's peer group, the Morningstar Short-term Bond Category, decreased 0.06%. What were the most significant factors impacting Fund performance? What factors were behind the Fund's underperformance versus the benchmark? The Fund's slight underperformance versus its benchmark largely reflected the performance of its mortgage-backed and asset-backed securities. Mortgage-backed and asset-backed securities performed relatively well during the first quarter, although prices of the mortgage-backed sector lagged equivalent duration Treasury prices in March, based on expectations prepayments would increase during the months ahead. One asset-backed security was unexpectedly downgraded by a rating agency during the first quarter, which acted as a slight drag on portfolio performance, and helped contribute to modest underperformance versus our benchmark during that period. The Fund gained ground during the second quarter, reflecting the yield advantage of corporate, mortgage and asset-backed securities versus U.S. Treasury securities. The first quarter was marked by a significant drop in interest rates, which was sparked by the February U.S. employment report. The Labor Department reported in early March that the economy added 83,000 jobs in February, which was down sharply from January's gain and well below the type of growth experienced in the 1980's and 1990's. The meager gain in jobs coupled with the overall unemployment rate holding steady at 5.6% caused interest rates to decline sharply and bond prices rallied. For example, prices on 10-year U.S. Treasury notes gained by 4.6% during the first quarter. Corporate bond spreads were relatively stable during the first quarter, after experiencing a major bull market in 2003. Corporate bonds considerably outperformed Treasury securities during most of last year, as the prices of these bonds rallied in response to signs that an economic rebound would improve the credit outlook for companies issuing bonds. Interest rates were the biggest driver of Fund performance during the second quarter. Interest rates made a significant move higher during the quarter, only to recede slightly at the end of June. For example, the yield on 10-year U.S. Treasury Notes stood at 3.84% on March 31, rose to 4.87% by June 14, and eased back to 4.58% on June 30. The rise in rates mirrored the signs of improved business confidence in the economy and its prospects. The Labor Department reported that employers added 208,000 jobs to non-farm payrolls in May, and that hiring in March and April was more robust than had previously been reported. As mentioned, the positive yield advantage across all of the "spread" sectors contributed to the Fund's performance. This positive differential was especially noticeable in the mortgage- and asset-backed sectors of the fixed-income markets, which benefited from a decline in prepayments. 40 Semi-Annual Report June 30, 2004 Late in the second quarter geopolitical events had a positive impact on the markets, as the U.S. transfer of sovereignty to an interim Iraqi government ahead of the June 30/th/ deadline calmed those investors who were anxious about the potential for problems. Which investment strategies enhanced the Fund's return? Were there any investment strategies that produced the best results? Our investment strategy through the first half of the year has been to exploit the yield advantage of corporate, mortgage and asset-backed securities versus U.S. Treasury securities. These securities have generated higher yields and exhibited relatively stable returns for the quarter. Corporate bond spreads have been underpinned by a lack of supply and a dearth of new issuance. In addition, as corporations have benefited from productivity gains, credit quality has improved. As a result of the improved credit quality, there have been fewer downgrades of corporate issues and an increased number of upgrades, when compared to the environment a several years ago. The market has gone from a period where corporate bonds were too cheap--reflecting a lack of demand in the aftermath of a period of corporate scandals--to a period during the first quarter of this year marked by fair value and renewed investor confidence, and finally to an environment in the second quarter which there has been less discrimination in terms of bond valuations. What were among the weakest performing sectors for the Fund? There really was not any sector that stood out in terms of weaker-than expected performance during the first half of the year. As we mentioned, one asset-backed security was unexpectedly downgraded by a rating agency during the first quarter, which acted as a slight drag on portfolio performance. That security was subsequently sold out of the Fund's portfolio of investments. What is your current strategy? How is the Fund positioned? We remain on the "defensive side" with respect to interest rates. The fixed-income markets are currently "discounting,"--that is, expecting--the possibility that the Federal Reserve Board will nudge interest rates higher, in a series of three-to-four 0.25% rate hikes over the balance of 2004. We believe corporate bond spreads should remain supported by improving credit fundamental considerations and by the favorable supply/demand characteristics we mentioned earlier. It is worth noting that the fixed income markets--and the corporate bond market in particular--have yet to experience any "crowding out" from any increased borrowing demands on the part of the U.S. Government to finance the budget deficit. We expect rates to move higher in an orderly manner, and have confidence owning "callable" mortgage-backed and asset-backed securities. We believe a great deal of "call risk' has left the market. The refinancing boom is largely over, and the outlook for prepayments has significantly improved from earlier this year as well as one year ago. We intend to maintain our commitment to our current strategy within the Corporate, Asset-backed and Mortgage-backed markets, deploying new money as it becomes available within each sector. Consequently, the Fund will remain overweight in favor of corporate bonds as well as mortgage-backed and asset-backed issues, and underweight in Treasury and Agency securities. We still see value in a variety of sectors and asset classes, and believe we can add significant value as managers in our ability to reinvest principal and interest in sectors, such as asset-backed securities, that will provide the Fund's portfolio with meaningful differentiation in yield when compared to U.S. Treasury securities. June 30, 2004 William Blair Funds 41 - -------------------------------------------------------------------------------- Income Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Performance Highlights - -------------------------------------------------------------------------------- Annual Total Return -------------------------------------- 6/30/2004(a) 2003 2002 2001 2000 1999 ------------ ---- ---- ---- ----- ---- Income Fund Class N.......... (0.44)% 3.68% 7.91% 7.18% 9.99% 0.34% Income Fund Class I.......... (0.33) 3.76 8.04 7.32 10.28 0.30(a)(b) Lehman Intermediate Government/Credit Bond Index (0.11) 4.31 9.84 8.96 10.12 0.39 -------------------------------------- Average Annual Total Return at 6/30/2004 -------------------------------------- Since 1 Year 3 Year 5 Year 10 Year Inception ------ ------ ------ ------- --------- Income Fund Class N 0.23% 4.88% 5.75% 6.18% --% Income Fund Class I 0.36 5.03 -- -- 6.11(c) ------------------------------------------------------------------ (a)Total return is not annualized for periods that are less than a full year. (b)For the period from October 1, 1999 (Commencement of the Class) to December 31, 1999. (c)For the period from October 1, 1999 to June 30, 2004. Illustration of an assumed investment of $10,000 with reinvestment of capital gain distributions and income dividends [CHART] Income Fund Lehman Intermediate Class N Gov/Credit Index 1993 $10,000 $10,000 1994 9,900 9,800 1995 11,400 11,300 1996 11,700 11,800 1997 12,600 12,700 1998 13,500 13,800 1999 13,600 13,800 2000 14,900 15,200 2001 16,000 16,600 2002 17,300 18,200 2003 17,900 19,000 6/04 17,800 19,000 Past performance does not guarantee future results and current performance may be lower or higher than the data quoted. Total returns shown assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. For the most current month-end performance information, please call 1-800-742-7272, or visit our Web site at www.williamblairfunds.com. Class N shares are available to the general public without a sales load. The performance highlights and graph presented above do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The Lehman Intermediate Government/Credit Bond Index indicates broad intermediate government/corporate bond market performance. This report identifies the Fund's investments on June 30, 2004. These holdings are subject to change. Not all investments in the Fund performed the same, nor is there any guarantee that these investments will perform as well in the future. Market forecasts provided in this report may not necessarily come to pass. 42 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Income Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all amounts in thousands) (unaudited) - ------- ----------------------------------------------- ------- Principal Amount Value - ------------------------------------------------------- ------- U.S. Government and U.S. Government Agency--7.4% U.S. Treasury--5.1% $ 3,000 U.S. Treasury Note, 6.000%, due 8/15/09........ $3,297 8,000 U.S. Treasury Note, 6.500%, due 2/15/10........ 9,014 1,500 1,434 - ------- U.S. Treasury Note, 3.875%, due 2/15/13........ ------- 12,500 13,745 - ------- Total U.S. Treasury Obligations................ ------- Government National Mortgage Association (GNMA)--2.2% $3,543 #616250, 6.000%, due 2/15/24................... 3,654 2,250 2,331 - ------- #2002-48, Tranche 0B, 6.000%, due 5/16/30...... ------- 5,793 5,985 - ------- Total Government National Mortgage Association. ------- Small Business Administration--0.1% -- Receipt for Multiple Originator Fees, #3, 0.814%, due 11/01/08 (Interest Only) WAC...... 64 149 157 - ------- Loan #100023, 9.375%, due 11/25/14............. ------- 149 221 - ------- Total Small Business Administration Obligations ------- Federal Home Loan Mortgage Corp. (FHLMC)--18.9% $1,084 #G10067, 7.000%, due 1/1/08.................... 1,131 354 #G10147, 8.500%, due 2/1/08.................... 371 2,200 #1601, Tranche PJ, 6.000%, due 10/15/08, VRN... 2,275 1,561 #1612, Tranche SE, 8.100%, due 11/15/08, VRN... 1,639 1,444 #E80050, 6.000%, due 10/1/09................... 1,513 1,011 #G90028, 7.000%, due 5/15/09................... 1,072 1,185 #G90019, 7.500%, due 12/17/09.................. 1,260 5,500 7.000%, due 3/15/10............................ 6,196 901 #E65418, 7.000%, due 8/1/10.................... 940 1,003 #G10457, 7.000%, due 2/1/11.................... 1,065 924 #E00436, 7.000%, due 6/1/11.................... 981 2,396 #E90630, 6.000%, due 7/1/12.................... 2,507 587 #G10708, 6.500%, due 8/1/12.................... 622 1,539 #E91999, 5.000%, due 10/1/12................... 1,568 372 #G11218, 7.000%, due 10/1/12................... 395 2,537 #E96147, 5.000%, due 5/1/13.................... 2,581 1,915 #E95846, 4.500%, due 5/1/13.................... 1,917 2,287 #G10839, 5.500%, due 10/1/13................... 2,352 2,310 #E72924, 7.000%, due 10/1/13................... 2,451 2,795 #E00639, 5.000%, due 3/1/14.................... 2,824 438 #E81908, 8.500%, due 12/1/15................... 469 1,707 #G90022, 8.000%, due 9/17/16................... 1,791 2,379 #G11486, 7.500%, due 4/1/17.................... 2,535 2,649 #E90398, 7.000%, due 5/1/17.................... 2,811 914 #M30028, 5.500%, due 5/1/17.................... 947 1,912 #G11549, 7.000%, due 7/1/17.................... 2,029 2,821 #G90027, 6.000%, due 11/15/17.................. 2,938 531 #C67537, 9.500%, due 8/1/21.................... 594 870 878 - ------- #G21, Tranche J, 6.250%, due 8/25/22........... ------- 48,126 50,652 - ------- Total FHLMC Mortgage Obligations............... ------- - -------- --------------------------------------------- ------ Principal Amount Value - ------------------------------------------------------ ------ Federal National Mortgage Association (FNMA)--19.3% $ 1,347 #545560, 8.000%, due 5/1/07.................. $1,416 1,163 #93-196, Tranche SA, 18.723%, due 10/25/08, VRN......................................... 1,363 520 #1993-221, Tranche SG, 12.992%, due 12/25/08, VRN......................................... 556 818 #765396, 5.500%, due 1/1/09.................. 845 1,633 #731691, 7.000%, due 9/1/09.................. 1,731 1,142 #695512, 8.000%, due 9/1/10.................. 1,217 2,273 #725479, 8.500%, due 10/1/10................. 2,443 3,393 #255056, 5.000%, due 11/1/10................. 3,440 6,600 6.250%, due 2/1/11........................... 7,086 1,181 #313816, 6.000%, due 4/1/11.................. 1,235 553 #577393, 10.000%, due 6/1/11................. 610 1,499 #577395, 10.000%, due 8/1/11................. 1,661 3,102 # 254705, 5.500%, due 3/1/13................. 3,218 1,260 #254788, 6.500%, due 4/1/13.................. 1,334 1,724 #725315, 8.000%, due 5/1/13.................. 1,843 692 #593561, 9.500%, due 8/1/14.................. 776 3,052 #567027, 7.000%, due 9/1/14.................. 3,243 3,529 #567026, 6.500%, due 10/1/14................. 3,736 1,144 #458124, 7.000%, due 12/15/14................ 1,199 1,443 #598453, 7.000%, due 6/1/15.................. 1,532 1,225 #555747, 8.000%, due 5/1/16.................. 1,310 698 #643217 , 6.500%, due 6/1/17................. 737 1,773 #682075, 5.500%, due 11/1/17................. 1,819 3,943 #662925, 6.000%, due 12/1/17................. 4,130 371 #1996-14, Tranche B, 3.801%, due 4/25/23..... 371 11 #1993-19, Tranche SH, 11.233%, due 4/25/23, VRN......................................... 14 1,711 #254797, 5.000%, due 6/1/23.................. 1,691 1,050 1,100 - -------- #733897, 6.500%, due 12/1/32................. ------ 48,850 51,656 - -------- Total FNMA Mortgage Obligations.............. ------ See accompanying Notes to Financial Statements. June 30, 2004 William Blair Funds 43 - -------------------------------------------------------------------------------- Income Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) NRSRO Principal Rating Amount (unaudited) Value - --------- ------------------------------- ----------- -------- Collateralized Mortgage Obligations--22.2% $ 2,500 Security National Mortgage Loan Trust, 2002-2, Tranche M2, 6.460%, due 8/25/08........... A+ $ 2,511 614 GRP 2004-1 3.960%, due 3/25/09....................... A 613 5,125 Condor Auto, 2003-A, Tranche B, 7.000%, due 12/15/09.......... A3 5,228 2,040 Countrywide Alternative Loan Trust, 2003-11T1, Tranche M, 4.750% due 7/25/18............ AA 1,968 1,818 Cityscape Home Equity Loan Trust, 1997-4, Tranche M2, 7.710%, due 10/25/18.......... A 1,816 1,900 ABFS, 2002-2, Tranche A6, 5.850%, due 3/15/19........... AAA 1,976 2,960 Security National Mortgage Loan Trust, 2001-2A, Tranche B, 8.100%, due 10/25/20.......... BBB 2,978 3,172 Countrywide, 2001-HLV1, Tranche B1, 9.385%, due 5/10/22................... BBB 3,275 244 First Plus, 1998-3, Tranche A7, 6.950%, due 10/10/22.......... AAA 244 1,216 First Plus, 1997-4, Tranche M2, 7.330%, due 9/11/23........... A 1,215 973 First Plus, 1997-4, Tranche A8, 7.310%, due 9/11/23........... AAA 972 712 First Plus, 1998-2, Tranche M2, 7.510%, due 5/10/24........... A2 711 208 First Plus, 1998-3, Tranche M2, 7.420%, due 5/10/24........... A2 209 2,144 Security National Mortgage Loan Trust, 2000-2, Tranche B, 9.510%, due 9/25/24........... A2 2,238 630 Security National Mortgage Loan Trust, 2001-2A, Tranche M, 8.100%, due 11/25/24.......... A 643 1,577 CIT Group Home Equity Loan Trust, 98-1 M2, 6.720%, due 9/15/27....................... A2 1,616 3,035 GMAC Mortgage Corporation Loan Trust, 2000-CL1, Tranche M, 8.720%, due 6/25/26........ AA+ 3,109 4,425 Green Tree Home Improvement Loan Trust, 1998-E, Tranche HEM2, 7.270%, due 6/15/28..... A+ 4,499 2,313 Delta Funding Home Equity Loan Trust, 2000-2, Tranche A6F, 7.970%, due 8/15/30........... AAA 2,264 2,700 Bear Stearns ABS, 2001-A, Tranche M1 7.540%, due 2/15/31....................... A 2,860 2,000 Countrywide, 2000-2, Tranche MF2, 9.000%, due 6/25/31...... A 2,054 590 Countrywide, 2001-1, Tranche MF2, 7.511%, due 7/25/31...... AA- 608 2,222 IMSA, 2001-5, Tranche M1 7.250%, due 8/25/31........... AA 2,297 4,635 Origin, 2001-A, Tranche A5, 7.080%, due 3/15/32........... Aaa 4,738 1,600 Security National Mortgage Loan Trust, 2004-1A, Tranche M2, 6.750%, due 06/25/32.......... A 1,590 NRSRO Principal Rating Amount (unaudited) Value - --------- --------------------------------- ----------- ------- Collateralized Mortgage Obligations--(continued) $ 1,164 Structured Assets Security Corporation, 2002-17, Tranche B3, 6.077%, due 9/25/32......... BBB $1,135 943 GRP Real Estate Asset Trust, 2003-1, Tranche A, 5.970%, due 11/25/32........................ A 942 2,934 LSSCO, 2004-2, Tranche M1, 5.177%, due 2/28/33............. AA 2,964 324 ABFS, 2002-2, Tranche A-7, 5.125%, 6/15/33................. AAA 332 1,500 ABFS, 2002-3, Tranche MI, 1,530 ------- 5.402%, 9/15/33................. AA ------- 58,218 Total Collateralized Mortgage 59,135 ------- Obligations..................... ------- Corporate Obligations--30.3% 3,499 Block Financial Corporation, 8.500%, due 4/15/07............. A 3,927 2,000 Mellon Bank NA, 7.375%, due 5/15/07......................... A+ 2,195 1,336 Ford Motor Credit, 7.200%, due 6/15/07......................... BBB 1,421 2,775 Applied Materials, Inc., 6.750%, due 10/15/07.................... A- 3,039 1,000 Amgen Inc., 6.500%, due 12/01/07........................ A+ 1,090 2,550 DaimlerChrysler, NA Holdings, 4.750%, due 1/15/08............. A3 2,571 2,200 Lehman Brothers Holdings 4.000%, due 1/22/08............. A+ 2,196 1,650 Target Corporation, 3.375%, due 3/1/08.............. A+ 1,623 2,350 Wells Fargo Company, 3.500%, due 4/4/08.............. AA 2,316 2,225 Cardinal Health, Inc., 6.250%, due 7/15/08............. A 2,384 2,425 CIT Group Inc., 3.375%, due 4/1/09.............. A 2,303 3,475 ConocoPhillips, Inc., 8.750%, due 5/25/10............. A- 4,200 2,300 Household Finance Corporation, 8.000%, due 7/15/10............. A 2,669 2,399 Boeing Capital Corporation, 7.375%, due 9/27/10............. A+ 2,713 2,500 Citigroup, Inc., 7.250%, due 10/1/10............. A+ 2,816 2,125 Comcast Cable Communications Corp., 6.750%, due 1/30/11...... BBB 2,293 2,600 Sprint Capital Corp., 7.625%, due 1/30/11......................... BBB 2,874 2,600 Countrywide Financial Corp., 4.000%, due 3/22/11............. A 2,425 1,900 Time Warner, 6.750%, due 4/15/11......................... BBB+ 2,046 3,200 Morgan Stanley, 6.750%, due 4/15/11......................... A+ 3,507 3,000 General Motors Acceptance Corporation, 6.875%, due 9/15/11......................... BBB+ 3,076 1,500 Ford Motor Credit Co., Inc. 7.250%, due 10/25/11............ BBB+ 1,566 See accompanying Notes to Financial Statements. 44 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Income Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) NRSRO Principal Rating Amount (unaudited) Value - --------- ----------------------------------- ----------- -------- Corporate Obligations--30.3%--(continued) $ 2,850 National Rural Utility Cooperative, 7.250%, due 3/1/12................ A $3,236 2,500 Weyerhaeuser Company, 6.750%, due 3/15/12....................... BBB 2,707 2,500 GE Capital Corporation, 6.000%, due 6/15/12....................... AAA 2,638 2,000 SLM Corporation, 5.125%, due 8/27/12........................... A+ 1,976 2,550 Verizon Global Funding Corporation, 7.375%, due 9/1/12............................ A+ 2,868 2,360 Cox Communications Inc., 7.125%, due 10/1/12............... BBB 2,586 3,200 IBM Corporation, 4.750%, due 11/29/12.......................... A+ 3,131 2,400 Kroger Company, 5.500%, due 2/1/13............................ BBB 2,393 1,900 Ohio Power Company, 5.500%, due 2/15/13....................... A3 1,914 2,000 TXU Energy Company, 7.00%, 2,178 - -------- due 3/15/13....................... BBB -------- 75,869 80,877 - -------- Total Corporate Obligations........ -------- 249,505 Total Long Term Investments--98.1% $262,271 - -------- (Cost $261,797)............................. -------- - ---------- WAC = Weighted Average Coupon VRN = Variable Rate Note NRSRO = Nationally Recognized Statistical Rating Organization, such as S&P, Moody's or Fitch The obligations of certain U.S. Government-sponsored entities are neither issued nor guaranteed by the United States Treasury. NRSRO Principal Rating Amount (unaudited) Value - --------- ----------------------------- ----------- -------- Short-Term Investments--0.9% $2,345 American Express Corporation, $2,345 VRN 1.170%, due 7/1/04...... A+ -------- 2,345 Total Short-Term Investments 2,345 - -------- (Cost $2,345)............. -------- $251,850 Total Investments--99.0% 264,616 ======== (Cost $264,142)........... -------- Cash and other assets, less liabilities--1.0%...... 2,682 -------- Net Assets--100.0%........... $267,298 ======== See accompanying Notes to Financial Statements. June 30, 2004 William Blair Funds 45 [PHOTO] KAPLAN James S. Kaplan [PHOTO] Chris Vincent Christopher T. Vincent - -------------------------------------------------------------------------------- READY RESERVES FUND - -------------------------------------------------------------------------------- The Ready Reserves Fund invests primarily in short-term U.S. dollar-denominated money market instruments, and exclusively in high quality securities that are rated in the top two categories of credit quality. - -------------------------------------------------------------------------------- AN OVERVIEW FROM THE PORTFOLIO MANAGERS - -------------------------------------------------------------------------------- The return for the six months ended June 30, 2003 of the Fund's Class N Shares was 0.25%, versus the 0.20% return of the Fund's benchmark, the AAA-Rated Money Market Funds Average. Total assets were $1.05 billion at June 30, 2004, compared to $1.20 billion at December 31, 2003. Federal Reserve Monetary policy was the focus of the money markets during the first half of the year, with investors monitoring the strength of the economic recovery and its resultant implications for interest rates. The Fed voted at its March 16/th/ meeting to keep short-term interest rates at a 45-year low, saying in its statement that risks to economic growth were roughly equal and repeated its view that chances of a drop in prices were about the same as a pickup of inflation. This was a position that the Federal Reserve had adopted in December of 2003. Nonetheless, during the first quarter there began to be threads of communication from the Federal Reserve Board that interest rates could not remain as low as they were for an indefinite period of time. In January, for example, the Fed abandoned a promise to keep interest rates low for "a considerable period," in favor of a promise to be "patient" with any move to raise short-term interest rates. And in February, Federal Reserve Chairman Alan Greenspan cautioned that low interest rates "will not be compatible indefinitely" with the Fed's primary job of fighting inflation. As expected, the Federal Reserve decided at its June 30/th/ meeting to raise the federal funds rate--the interest rate that banks charge each other to lend money overnight--0.25% to 1.25%. It was the first time in four years that the Fed had raised the federal funds rate, which for the past year had been at a 46-year low. The Federal Reserve's rate increase was viewed as a response to an economic recovery that is on solid footing and an employment picture that has shown steady signs of improvement. Most money market observers are currently "discounting,"--that is, expecting--the possibility that the Federal Reserve Board will nudge interest rates higher, in a series of three-to-four 0.25% rate hikes over the balance of 2004. Speaking to the International Monetary Conference in London in early June, Federal Reserve Board Chairman Alan Greenspan said that the central bank is, "of the view that monetary policy accommodation can be removed at a pace that is likely to be measured." However, he stated the Fed stood ready to tighten monetary policy more rapidly than the financial markets now expect, should inflationary pressures become more intense. For the money markets, continued strength in the economy should result in increased issuance of commercial paper by corporations, an affirmation of a healthy economy. We will continue to maintain our strategy of using commercial paper in the short end of the market, barbelled with fixed-rate obligations with slightly longer maturities, and also intend to emphasize floating-rate obligations, which price off of LIBOR. (LIBOR is the London Interbank Offered Rate, which is the rate the creditworthiest international banks dealing in Eurodollars--U.S. currency held in banks outside of the U.S.--charge each other for large loans.) At June 30, 2004, the Fund's average maturity was 59.9 days, compared to 59.5 days at the end of the first quarter and 54 days at the end of 2003. 46 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Ready Reserves Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Performance Highlights - -------------------------------------------------------------------------------- The Fund's 7 day yield on June 30, 2004 was 0.61%. Average Annual Total Returns--Class N Shares period ending June 30, 2004. 1 Year 5 Year 10 Year ------ ------ ------- Ready Reserves Fund 0.51% 2.82% 3.87% AAA Rated Money Market Funds 0.20% 2.72% 3.88% Past Performance does not guarantee future results and current performance may be lower or higher than the data quoted. For the most current month-end performance information, please call 1-800-742-7272, or visit our Web site at www.williamblairfunds.com. Total return includes reinvestment of income. Yields fluctuate and are not guaranteed. An investment in the Fund is neither insured nor guaranteed by the Federal Deposit Insurance Corp. (FDIC) or any government agency. Although the Fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the Fund. The AAA Rated Money Market Funds Average represents the average annual composite performance of all AAA rated First Tier Retail Money Market Funds listed by IBC Financial data. This report identifies the Fund's investment's on June 30, 2004. These holdings are subject to change. Not all fixed-income securities in the Fund performed the same, nor is there any guarantee that these fixed-income securities will perform as well in the future. Market forecasts provided in this report may not necessarily come to pass. June 30, 2004 William Blair Funds 47 - -------------------------------------------------------------------------------- Ready Reserves Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all amounts in thousands) (unaudited) - ------------------------------------------------------ ---------- Principal Amortized Amount Cost - --------- -------------------------------------------- ---------- Mortgage Backed Securities--1.0% $ 9,000 Federal Home Loan Mortgage Corp. (FHLMC), 1.219%, 7/21/04................... $ 9,000 1,999 Federal National Mortgage Assoc. (FNMA), 1,999 - -------- 1.070%, 7/28/04............................ ---------- 10,999 10,999 - -------- Total Mortgage Backed Securities............ ---------- Fixed Rate Notes--35.0% 38,371 Abbott Laboratories, 5.125%, 7/1/04......... 37,585 34,035 American General Finance Corporation, 1.64%-7.450%, 8/13/04-5/15/05.............. 33,548 10,039 Associates Corporation, 6.100%-8.625%, 10/15/04-2/15/05........................... 9,774 17,674 B.P. plc, 4.000%-6.20%, 10/15/04-5/27/05.... 17,406 20,810 Caterpillar Financial Services, 4.69%-6.875%, 8/1/04-4/25/05............... 20,506 6,076 ChevronTexaco Corporation, 6.000%-8.110%, 10/1/04-6/15/05............. 5,971 38,268 Coca-Cola Enterprises, 4.000%-8.000%, 8/1/04-6/1/05.............................. 37,615 15,122 Colgate-Palmolive Corporation, 1.375%-3.98%, 8/16/04-4/29/05.............. 15,091 5,521 E.I. DuPont de Nemours & Company, 6.750%, 10/15/04........................... 5,359 20,408 GE Capital Corporation, 1.670%-8.850%, 9/15/04-5/15/05............................ 20,065 17,641 IBM Credit Corporation, 1.235%-4.125%, 9/10/04-6/30/05............................ 17,629 3,811 Kimberly Clark, 10.000%, 3/15/05............ 3,711 33,707 National Rural Utility Cooperative Finance Corporation, 3.875%-6.375%, 7/15/04-1/15/05............................ 32,805 16,687 Procter & Gamble Corporation, 4.000%-6.660%, 12/15/04-4/30/05............ 16,289 23,951 SBC Communications, Inc., 6.300%-7.050%, 7/15/04-10/15/04........................... 23,055 5,611 U.S. Bancorp, 6.875%, 12/1/04............... 5,499 10,665 USAA Capital Corporation, 5.640%-7.540%, 3/30/05-4/18/05............................ 10,619 7,890 Verizon GTE North, 6.400%, 2/15/05.......... 7,752 1,152 Verizon West Virginia, 7.000%, 8/15/04...... 1,108 15,337 Wal-Mart Stores Inc., 4.150%-6.550%, 8/10/04-6/15/05............................ 14,991 30,536 Wells Fargo Financial, 1.619%-7.600%, 30,108 - -------- 7/15/04-5/3/05............................. ---------- 373,312 366,486 - -------- Total Fixed Rate Notes...................... ---------- Variable Rate Notes--12.7% $ 8,134 American General Finance Corporation, 1.909%, 9/20/04............................ 8,115 21,901 Caterpillar Financial Services, 1.240%-1.610%, 7/14/04-9/7/04.............. 21,888 3,251 Colgate-Palmolive, 1.251%, 7/13/04.......... 3,250 10,023 General Electric Capital Corporation, 1.43%, 7/2/04..................................... 10,019 6,018 National Rural Utility Cooperative Finance Corporation, 1.460%-1.580%, 8/7/04-9/10/04............................. 6,016 - ---------- VRN = Variable Rate Note - --------------------------------------------------- ---------- Principal Amortized Amount Cost - ---------- ---------------------------------------- ---------- $ 18,506 Paccar Financial Corporation, 1.080%-1.320%, 7/6/04-8/20/04.......... $ 18,503 40,174 US Bancorp, 1.450%-1.669%, 7/2/04-9/14/04......................... 40,149 1,003 USA Education Corporation, 1.450%, 7/26/04................................ 1,002 16,503 Wal Mart Stores Inc., 1.238%, 8/22/04... 16,502 7,757 7,756 - ---------- Wells Fargo Financial, 1.599%, 9/24/04.. ---------- 133,270 133,200 - ---------- Total Variable Rate Notes............... ---------- Asset Backed Commercial Paper--46.2% 45,000 Amsterdam Funding Corporation, 1.120%-1.250%, 7/12/04-7/22/04......... 44,976 40,000 Blue Ridge Asset Funding, 1.050%-1.090%, 7/2/04-7/9/04.......................... 39,993 9,000 CAFCO, L.L.C. 1.100%, 7/13/04........... 8,997 10,000 CRC Funding, L.L.C., 1.070%, 7/6/04..... 9,999 40,000 Daimler Chrysler Revolving Auto, 1.110%-1.280%, 7/9/04-7/27/04.......... 39,971 10,000 Delaware Funding Corporation, 1.090%, 7/8/04................................. 9,998 35,000 FCAR Owner Trust, 1.080%-1.120%, 7/7/04-7/16/04......................... 34,988 15,000 Govco, Inc. 1.250%, 7/29/04............. 14,985 40,000 Jupiter Securitization Corporation, 1.250%-1.300%, 7/23/04-7/30/04......... 39,963 15,000 Mortgage Interest Networking Trust, 1.290%, 7/29/04........................ 14,985 30,000 New Center Asset Trust, 1.120%, 7/13/04-7/14/04........................ 29,988 40,000 Old Line Funding, 1.090%-1.200%, 7/7/04-7/19/04......................... 39,986 35,000 Park Avenue Receivables, 1.240%-1.300%, 7/22/04-7/28/04........................ 34,971 27,983 Preferred Receivables Funding, 1.230%-1.250%, 7/19/04-7/26/04......... 27,962 40,000 Sheffield Receivables, 1.070%-1.240%, 7/2/04-7/21/04......................... 39,984 28,565 Thunder Bay Funding, 1.120%-1.250%, 7/12/04-7/23/04........................ 28,548 23,275 Windmill Funding Corporation, 23,262 - ---------- 1.080%-1.250%, 7/14/04-7/21/04......... ---------- 483,823 483,556 - ---------- Total Asset Backed Commercial Paper..... ---------- Commercial Paper--1.4% Insurance--1.4% 15,000 14,989 - ---------- Marsh & McClennan 1.200%, 7/20/04....... ---------- 15,000 14,989 - ---------- Total Commercial Paper.................. ---------- Demand Note--3.7% 38,401 American Express Corporation, VRN, 38,401 - ---------- 1.170%, 7/2/04......................... ---------- $1,054,805 Total Investments--100.0% 1,047,631 ========== (Cost $ 1,047,631)..................... ---------- Liabilities, plus cash and other assets--0.0%........................... (376) ---------- Net assets--100.0%...................... $1,047,255 ========== Portfolio Weighted Average Maturity..... 60 Days See accompanying Notes to Financial Statements. 48 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Statements of Assets and Liabilities - -------------------------------------------------------------------------------- June 30, 2004 (all dollar amounts in thousands) (unaudited) Tax- Small- Managed LargeCap Small Cap Mid Cap Growth Growth Growth Growth Growth Fund Fund Fund Fund Fund - - ----------- -------- -------- ----------- -------- Assets Investments in securities, at cost...................................... $ 217,557 $ 4,545 $ 5,382 $ 528,779 $ 12,895 Investments in Affiliated Fund, at cost................................. 3,273 2 107 14,797 761 ----------- -------- -------- ----------- -------- Investments in securities, at value..................................... $ 271,021 $ 5,822 $ 6,161 $ 632,605 $ 13,568 Investments in Affiliated Fund, at value................................ 3,273 2 107 14,797 761 Cash.................................................................... -- -- -- 86 -- Receivable for fund shares sold......................................... 459 -- -- 327 148 Receivable for investment securities sold............................... -- -- -- 7,096 -- Receivable from Advisor................................................. -- 2 8 -- 33 Dividend and interest receivable........................................ 248 4 6 91 5 ----------- -------- -------- ----------- -------- Total assets..................................................... 275,001 5,830 6,282 655,002 14,515 Liabilities Payable for investment securities purchased............................. -- 94 -- 1,998 37 Payable for fund shares redeemed........................................ 94 -- -- 673 -- Management fee payable.................................................. 184 4 4 530 11 Distribution and shareholder services fee payable....................... 9 -- -- 177 1 Other accrued expenses.................................................. 101 12 10 121 30 ----------- -------- -------- ----------- -------- Total liabilities................................................ 388 110 14 3,499 79 ----------- -------- -------- ----------- -------- Net Assets...................................................... $ 274,613 $ 5,720 $ 6,268 $ 651,503 $ 14,436 =========== ======== ======== =========== ======== Capital Composition of Net Assets Par value of shares of beneficial interest............................ $ 27 $ 1 $ 1 $ 27 $ 1 Capital paid in excess of par value................................... 244,507 6,557 11,007 509,436 13,770 Accumulated net investment income (loss).............................. (454) (25) (11) (3,676) (50) Accumulated realized gain (loss)...................................... (22,931) (2,090) (5,508) 41,890 42 Net unrealized appreciation (depreciation) of investments and foreign currencies........................................................... 53,464 1,277 779 103,826 673 ----------- -------- -------- ----------- -------- Net Assets...................................................... $ 274,613 $ 5,720 $ 6,268 $ 651,503 $ 14,436 =========== ======== ======== =========== ======== ..Class N Shares Net Assets............................................................ $ 46,520 $ 162 $ 363 $ 404,172 $ 4,549 Shares Outstanding.................................................... 4,671,413 19,048 61,746 16,604,030 427,528 Net Asset Value Per Share............................................. $ 9.96 $ 8.50 $ 5.88 $ 24.35 $ 10.64 Class I Shares Net Assets............................................................ $ 228,087 $ 5,552 $ 5,902 $ 247,316 $ 9,881 Shares Outstanding.................................................... 22,634,097 645,358 993,352 10,054,867 927,941 Net Asset Value Per Share............................................. $ 10.08 $ 8.61 $ 5.94 $ 24.60 $ 10.65 See accompanying Notes to Financial Statements. June 30, 2004 William Blair Funds 49 Statements of Operations - -------------------------------------------------------------------------------- for the Period Ended June 30, 2004 (all dollar amounts in thousands) (unaudited) Small-Mid Cap Tax-Managed Large Cap Small Cap Growth Growth Fund Growth Fund Growth Fund Growth Fund Fund - - ----------- ----------- ----------- ----------- --------- Investment income Dividends.................................................... $ 905 $ 17 $ 24 $ 594 $ 14 Less foreign tax withheld.................................... (31) -- -- -- -- Interest..................................................... 6 -- -- -- -- ------- ----- ----- ------- ---- Total income............................................... 880 17 24 594 14 Expenses Investment advisory fees..................................... 1,025 25 24 3,182 45 Distribution fees............................................ 52 -- -- 462 4 Shareholder services fees.................................... -- -- -- -- -- Custodian fees............................................... 31 8 7 68 16 Transfer agent fees.......................................... 110 4 5 172 15 Professional fees............................................ 18 8 7 22 15 Registration fees............................................ 16 15 15 58 11 Other expenses............................................... 82 2 4 142 26 ------- ----- ----- ------- ---- Total expenses before waiver............................... 1,334 62 62 4,106 132 Plus expenses recovered by the advisor..................... -- -- -- 164 Less expenses waived or absorbed by the Advisor............ -- (20) (27) -- (68) ------- ----- ----- ------- ---- Net expenses............................................... 1,334 42 35 4,270 64 ------- ----- ----- ------- ---- Net investment income (loss)............................... (454) (25) (11) (3,676) (50) Net realized and unrealized gain (loss) on investments, foreign currency transactions and other assets and liabilities Net realized gain (loss) on investments.................... 8,810 256 137 39,748 42 ------- ----- ----- ------- ---- Change in net unrealized appreciation (depreciation) on investments and other assets and liabilities.................. (8,134) (171) (181) 26,349 694 ------- ----- ----- ------- ---- Net increase (decrease) in net assets resulting from operations $ 222 $ 60 $ (55) $62,421 $686 ======= ===== ===== ======= ==== See accompanying Notes to Financial Statements. 50 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Statements of Changes in Net Assets - -------------------------------------------------------------------------------- for the Period Ended June 30, 2004 and the Year Ended December 31, 2003 (all amounts in thousands) (unaudited) Tax- Managed Large Cap Growth Growth Growth Fund Fund Fund - - ------------------ --------------- --------------- 2004 2003 2004 2003 2004 2003 - - -------- -------- ------- ------ ------ ------- Operations Net investment income (loss)................................. $ (454) $ (1,214) $ (25) $ (40) $ (11) $ (26) Net realized gain (loss) on investments, foreign currency transactions and other assets and liabilities............... 8,810 758 256 (483) 137 (553) Change in net unrealized appreciation (depreciation) on investments, foreign currency transactions and other assets and liabilities............................................. (8,134) 58,056 (171) 1,777 (181) 1,644 -------- -------- ------- ------ ------ ------- Net increase (decrease) in net assets resulting from operations.................................................. 222 57,600 60 1,254 (55) 1,065 Distributions to shareholders from Net investment income........................................ -- -- -- -- -- -- Net realized gain............................................ -- -- -- -- -- -- -------- -------- ------- ------ ------ ------- -- -- -- -- -- -- Capital stock transactions Net proceeds from sale of shares............................. 18,236 29,113 131 1,159 1,268 1,147 Shares issued in reinvestment of income...................... dividends and capital gain distributions..................... -- -- -- -- -- -- Less cost of shares redeemed................................. (25,499) (60,684) (1,342) (845) (464) (2,162) -------- -------- ------- ------ ------ ------- Net increase (decrease) in net assets resulting from capital share transactions.......................................... (7,263) (31,571) (1,211) 314 804 (1,015) -------- -------- ------- ------ ------ ------- Increase (decrease) in net assets............................ (7,041) 26,029 (1,151) 1,568 749 50 Net assets Beginning of period.......................................... 281,654 255,625 6,871 5,303 5,519 5,469 -------- -------- ------- ------ ------ ------- End of period................................................ $274,613 $281,654 $ 5,720 $6,871 $6,268 $ 5,519 ======== ======== ======= ====== ====== ======= Undistributed net investment income (loss) at the end of the period........................................................ $ (454) $ -- $ (25) $ -- $ (11) $ -- ======== ======== ======= ====== ====== ======= Small Cap Small-Mid Cap Growth Growth Fund Fund - - ------------------ --------------- 2004 2003 2004 2003(a) - - -------- -------- ------- ------- Operations Net investment income (loss)................................. $ (3,676) $ (2,137) $ (50) $ -- Net realized gain (loss) on investments, foreign currency transactions and other assets and liabilities............... 39,748 20,759 42 -- Change in net unrealized appreciation (depreciation) on investments, foreign currency transactions and other assets and liabilities............................................. 26,349 75,261 694 (21) -------- -------- ------- ------ Net increase (decrease) in net assets resulting from operations.................................................. 62,421 93,883 686 (21) Distributions to shareholders from Net investment income........................................ -- -- -- -- Net realized gain............................................ -- (7,443) -- -- -------- -------- ------- ------ -- (7,443) -- -- Capital stock transactions Net proceeds from sale of shares............................. 140,340 400,134 10,165 3,694 Shares issued in reinvestment of income...................... dividends and capital gain distributions..................... -- 7,200 -- -- Less cost of shares redeemed................................. (70,082) (53,530) (88) -- -------- -------- ------- ------ Net increase (decrease) in net assets resulting from capital share transactions.......................................... 70,258 353,804 10,077 3,694 -------- -------- ------- ------ Increase (decrease) in net assets............................ 132,679 440,243 10,763 3,673 Net assets Beginning of period.......................................... 518,824 78,581 3,673 -- -------- -------- ------- ------ End of period................................................ $651,503 $518,824 $14,436 $3,673 ======== ======== ======= ====== Undistributed net investment income (loss) at the end of the period........................................................ $ (3,676) $ -- $ (50) $ -- ======== ======== ======= ====== - ---------- (a)For the period from December 29, 2003 (Commencement of Operations) to December 31, 2003. See accompanying Notes to Financial Statements. June 30, 2004 William Blair Funds 51 - -------------------------------------------------------------------------------- Statements of Assets and Liabilities - -------------------------------------------------------------------------------- June 30, 2004 (all dollar amounts in thousands) (unaudited) International International Value Ready Growth Equity Discovery Income Reserves Fund Fund Fund Fund Fund - - ------------- ------------- ---------- ----------- -------------- Assets Investments in securities, at cost.......................... $ 2,061,736 $ 2,957 $ 205,852 $ 264,142 $ 1,047,631 Investments in Affiliated Fund, at cost..................... 23,483 336 2,172 -- -- ----------- -------- ---------- ----------- -------------- Investments in securities, at value......................... $ 2,486,303 $ 3,139 $ 262,879 $ 264,616 $ 1,047,631 Investments in Affiliated Fund, at value.................... 23,483 336 2,172 -- -- Cash........................................................ -- -- -- 81 -- Foreign currency, at value (cost $714 )..................... 697 -- -- -- -- Receivable for fund shares sold............................. 14,034 -- 20 203 -- Receivable for investment securities sold................... 40,933 -- 2,773 -- -- Receivable from Advisor..................................... -- 11 23 -- -- Dividend and interest receivable............................ 2,388 1 194 2,630 6,547 ----------- -------- ---------- ----------- -------------- Total assets......................................... 2,567,838 3,487 268,061 267,530 1,054,178 Liabilities Payable for investment securities purchased................. 27,349 -- 4,403 -- 6,260 Payable for fund shares redeemed............................ 1,309 -- 67 66 -- Management fee payable...................................... 2,054 3 234 112 194 Distribution and shareholder services fee payable........... 357 -- 34 7 292 Dividend payable............................................ -- -- -- -- 36 Other accrued expenses...................................... 451 10 109 47 141 ----------- -------- ---------- ----------- -------------- Total liabilities.................................... 31,520 13 4,847 232 6,923 ----------- -------- ---------- ----------- -------------- Net Assets.......................................... $ 2,536,318 $ 3,474 $ 263,214 $ 267,298 $ 1,047,255 =========== ======== ========== =========== ============== Capital Composition of Net Assets Par value of shares of beneficial interest................ $ 132 $ -- $ 11 $ 27 $ 1,048 Capital paid in excess of par value....................... 2,170,553 3,299 185,109 280,237 1,047,274 Accumulated net investment income (loss).................. (244) (1) 149 (538) 81 Accumulated realized gain (loss).......................... (58,675) (6) 20,918 (12,902) (1,148) Net unrealized appreciation (depreciation) of investments and foreign currencies................................... 424,552 182 57,027 474 -- ----------- -------- ---------- ----------- -------------- Net Assets.......................................... $ 2,536,318 $ 3,474 $ 263,214 $ 267,298 $ 1,047,255 =========== ======== ========== =========== ============== Class N Shares Net Assets................................................ $ 1,784,875 $ 39 $ 36,313 $ 56,542 $ 1,047,255 Shares Outstanding........................................ 92,947,496 3,721 1,521,184 5,570,553 1,048,321,944 Net Asset Value Per Share................................. $ 19.20 $ 10.56 $ 23.87 $ 10.15 $ 1.00 Class I Shares Net Assets................................................ $ 751,433 $ 3,429 $ 226,886 $ 210,751 Shares Outstanding........................................ 38,657,621 324,809 9,462,691 20,816,835 Net Asset Value Per Share................................. $ 19.44 $ 10.56 $ 23.98 $ 10.12 See accompanying Notes to Financial Statements. 52 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Statements of Operations - -------------------------------------------------------------------------------- for the Period Ended June 30, 2004 (all dollar amounts in thousands) (unaudited) International International Value Growth Equity Discovery Income Fund Fund Fund Fund - - ------------- ------------- --------- ------- Investment income Dividends............................................................... $ 20,796 $ 2 $ 1,643 $ -- Less foreign tax withheld............................................... (2,204) -- -- -- Interest................................................................ 192 1 73 6,618 -------- ---- ------- ------- Total income.......................................................... 18,784 3 1,716 6,618 Expenses Investment advisory fees................................................ 11,347 3 1,410 658 Distribution fees....................................................... 2,054 -- 37 40 Shareholder services fees............................................... -- -- -- -- Custodian fees.......................................................... 1,045 4 42 37 Transfer agent fees..................................................... 865 1 66 49 Professional fees....................................................... 65 2 16 15 Registration fees....................................................... 87 4 10 24 Other expenses.......................................................... 519 1 9 36 -------- ---- ------- ------- Total expenses before waiver.......................................... 15,982 15 1,590 859 Less expenses repaid to (waived and absorbed by) the Advisor.......... -- (11) (23) -- -------- ---- ------- ------- Net expenses.......................................................... 15,982 4 1,567 859 -------- ---- ------- ------- Net investment income (loss).......................................... 2,802 (1) 149 5,759 Net realized and unrealized gain (loss) on investments, foreign currency transactions and other assets and liabilities Net realized gain (loss) on investments............................... 76,358 (2) 16,473 (2,404) Net realized gain (loss) on foreign currency transactions and other assets and liabilities............................................... (7,519) (4) -- -- -------- ---- ------- ------- Total net realized gain (loss)........................................ 68,839 (6) 16,473 (2,404) Change in net unrealized appreciation (depreciation) on investments and other assets and liabilities............................................. (13,963) 182 (4,102) (4,409) -------- ---- ------- ------- Net increase (decrease) in net assets resulting from operations........... $ 57,678 $175 $12,520 $(1,054) ======== ==== ======= ======= Ready Reserves Fund - - -------- Investment income Dividends............................................................... $ -- Less foreign tax withheld............................................... -- Interest................................................................ 6,383 ------ Total income.......................................................... 6,383 Expenses Investment advisory fees................................................ 1,334 Distribution fees....................................................... -- Shareholder services fees............................................... 1,929 Custodian fees.......................................................... 97 Transfer agent fees..................................................... 59 Professional fees....................................................... 30 Registration fees....................................................... 14 Other expenses.......................................................... 176 ------ Total expenses before waiver.......................................... 3,639 Less expenses repaid to (waived and absorbed by) the Advisor.......... -- ------ Net expenses.......................................................... 3,639 ------ Net investment income (loss).......................................... 2,744 Net realized and unrealized gain (loss) on investments, foreign currency transactions and other assets and liabilities Net realized gain (loss) on investments............................... -- Net realized gain (loss) on foreign currency transactions and other assets and liabilities............................................... -- ------ Total net realized gain (loss)........................................ -- Change in net unrealized appreciation (depreciation) on investments and other assets and liabilities............................................. -- ------ Net increase (decrease) in net assets resulting from operations........... $2,744 ====== See accompanying Notes to Financial Statements. June 30, 2004 William Blair Funds 53 - -------------------------------------------------------------------------------- Statements of Changes in Net Assets - -------------------------------------------------------------------------------- for the Period Ended June 30, 2004 and the Year Ended December 31, 2003 (all amounts in thousands) (unaudited) International International Value Growth Equity Discovery Fund Fund Fund - - ---------------------- ------------- ------------------ 2004 2003 2004(a) 2004 2003 - - ---------- ---------- ------------- -------- -------- Operations Net investment income (loss)............................. $ 2,802 $ 1,037 $ (1) $ 149 $ (310) Net realized gain (loss) on investments, foreign currency transactions and other assets and liabilities............................................. 68,839 (14,894) (6) 16,473 6,425 Change in net unrealized appreciation (depreciation) on investments, foreign currency transactions and other assets and liabilities.................................. (13,963) 459,102 182 (4,102) 60,586 ---------- ---------- ------ -------- -------- Net increase (decrease) in net assets resulting from operations............................................ 57,678 445,245 175 12,520 66,701 Distributions to shareholders from Net investment income.................................... -- (2,775) -- -- -- Net realized gain........................................ -- -- -- -- -- ---------- ---------- ------ -------- -------- -- (2,775) -- -- -- Capital stock transactions Net proceeds from sale of shares......................... 775,248 1,012,995 3,299 43,068 53,181 Shares issued in reinvestment of income dividends and capital gain distributions.............................. -- 2,457 -- -- -- Less cost of shares redeemed............................. (196,307) (337,011) -- (29,485) (73,573) ---------- ---------- ------ -------- -------- Net increase (decrease) in net assets resulting from capital stock transactions............................ 578,941 678,441 3,299 13,583 (20,392) ---------- ---------- ------ -------- -------- Increase (decrease) in net assets...................... 636,619 1,120,911 3,474 26,103 46,309 Net assets Beginning of period...................................... 1,899,699 778,788 -- 237,111 190,802 ---------- ---------- ------ -------- -------- End of period............................................ $2,536,318 $1,899,699 $3,474 $263,214 $237,111 ========== ========== ====== ======== ======== Undistributed net investment income (loss) at the end of the period................................................ $ (244) $ (3,046) $ (1) $ 149 $ -- ========== ========== ====== ======== ======== Ready Income Reserves Fund Fund - - ------------------ ----------------------- 2004 2003 2004 2003 - - -------- -------- ---------- ----------- Operations Net investment income (loss)............................. $ 5,759 $ 10,144 $ 2,744 $ 8,301 Net realized gain (loss) on investments, foreign currency transactions and other assets and liabilities............................................. (2,404) 865 -- (33) Change in net unrealized appreciation (depreciation) on investments, foreign currency transactions and other assets and liabilities.................................. (4,409) (2,342) -- -- -------- -------- ---------- ----------- Net increase (decrease) in net assets resulting from operations............................................ (1,054) 8,667 2,744 8,268 Distributions to shareholders from Net investment income.................................... (6,425) (13,802) (2,744) (8,301) Net realized gain........................................ -- -- -- -- -------- -------- ---------- ----------- (6,425) (13,802) (2,744) (8,301) Capital stock transactions Net proceeds from sale of shares......................... 38,997 139,094 811,071 1,648,639 Shares issued in reinvestment of income dividends and capital gain distributions.............................. 4,561 10,207 2,739 8,334 Less cost of shares redeemed............................. (33,843) (75,240) (920,487) (1,827,009) -------- -------- ---------- ----------- Net increase (decrease) in net assets resulting from capital stock transactions............................ 9,715 74,061 (106,677) (170,036) -------- -------- ---------- ----------- Increase (decrease) in net assets...................... 2,236 68,926 (106,677) (170,069) Net assets Beginning of period...................................... 265,062 196,136 1,153,932 1,324,001 -------- -------- ---------- ----------- End of period............................................ $267,298 $265,062 $1,047,255 $ 1,153,932 ======== ======== ========== =========== Undistributed net investment income (loss) at the end of the period................................................ $ (538) $ 128 $ 81 $ 81 ======== ======== ========== =========== - ---------- (a)For the period from May 24, 2004 (Commencement of Operations) to June 30, 2004. See accompanying Notes to Financial Statements. 54 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Notes to Financial Statements - -------------------------------------------------------------------------------- (1) Significant Accounting Policies (a) Description of the Fund William Blair Funds (the "Fund") is a diversified mutual fund registered under the Investment Company Act of 1940, as amended, as an open-end management investment company. For each portfolio, the number of shares authorized is unlimited. The Fund currently consists of the following twelve portfolios (the "Portfolios"), each with its own investment objectives and policies. Equity Portfolios International Portfolios ----------------- ------------------------ Growth International Growth Tax-Managed Growth International Equity Large Cap Growth Institutional International Growth Small Cap Growth Institutional International Equity Small-Mid Cap Growth Fixed Income Portfolio ---------------------- Value Discovery Income Money Market Portfolio ---------------------- Ready Reserves The investment objectives of the Portfolios are as follows: Equity....... Long-term capital appreciation. International Long-term capital appreciation. Fixed Income. High level of current income with relative stability of principal. Money Market. Current income, a stable share price and daily liquidity. The Institutional International Growth Fund issues a separate report. The Institutional International Equity Fund has not commenced operations as of the date of this report. (b) Share Classes Five different classes of shares currently exist: A,B,C, N and I. This report includes financial highlight information for Classes N and I. The table below describes the Class N shares and the Class I shares covered by this report: Class Description - ----- ----------- N Class N shares are sold to the general public, either directly through the Fund's distributor or through a select number of financial intermediaries. Class N shares are sold without any sales load, and carry an annual 12b-1 distribution fee (0.25% for the Equity and International Portfolios and 0.15% for the Fixed Income Portfolio) or a service fee (0.35% for the Money Market Portfolio). I Class I shares are sold to a limited group of investors. They do not carry any sales load or distribution fees and generally have lower ongoing expenses than the other classes. Investment income, realized and unrealized gains and losses, and certain portfolio level expenses and expense reductions, if any, are allocated based on the relative net assets of each class, except for certain class specific expenses which are charged directly to the appropriate class. Differences in class expenses may result in the payment of different per share dividends by class. All share classes of the Portfolios have equal rights with respect to voting subject to class specific arrangements. (c) Investment Valuation The market value of domestic equity securities and options is determined by valuing securities traded on national securities exchanges or markets or in the over-the-counter markets at the last sales price or, if applicable, the official closing price or, in the absence of a sale on the date of valuation, at the latest bid price. From January 1, 2003 until November 24, 2003, the value of foreign securities was determined based upon the last sale price on the foreign exchange or market on which it is primarily traded or, if there had been no sale on the date of valuation, at the latest bid price. The Board of Trustees approved amendments to the Fund's valuation procedures in October 2003 relating to the manner in which the Funds' foreign securities are valued. This change was implemented November 24, 2003. To reflect June 30, 2004 William Blair Funds 55 this change, if the foreign exchange or market on which a security is primarily traded closes before the close of regular trading on the New York Stock Exchange (4:00 p.m. Eastern time), the Funds use an independent pricing service on a daily basis to estimate the fair value price as of the close of regular trading on the New York Stock Exchange. Otherwise, the value of foreign equity securities is determined based on the last sale price on the foreign exchange or market on which it is primarily traded or, if there have been no sales during that day, at the latest bid price. Foreign currency forward contracts and foreign currencies are valued at the forward and current exchange rates, respectively, prevailing on the date of valuation. Long-term, fixed income securities are valued based on market quotations, or by independent pricing services that use prices provided by market makers or by estimates of market values obtained from yield data relating to instruments or securities with similar characteristics. Investments in other funds are valued at the underlying fund's net asset value on the date of valuation. Other securities, and all other assets, including securities for which a market price is not available, or the value of which is affected by a significant valuation event, are valued at fair value as determined in good faith by, or under the direction of the Board of Trustees and in accordance with the Fund's valuation procedures. As of June 30, 2004, there were securities held in Small Cap Growth, Value Discovery and International Growth and International Equity Portfolios requiring fair valuation pursuant to the Fund's valuation procedures. Short-term securities held in the Ready Reserves Fund are valued at amortized cost, which approximates market value. (d) Investment income and investment transactions Dividend income is recorded on the ex-dividend date, except for those dividends from certain foreign securities which are recorded as soon as the information is available. Premiums and discounts are accreted and amortized on a straight-line basis for short-term investments and on an effective interest method for long-term investments. Interest income is determined on the basis of the interest accrued, adjusted for amortization of premium or discount. Variable rate bonds and floating rate notes earn interest at coupon rates that fluctuate at specific time intervals. The interest rates shown in the Portfolio of Investments for the Income Portfolio and the Ready Reserves Portfolio were the rates in effect on June 30, 2004. Put bonds may be redeemed at the discretion of the holder on specified dates prior to maturity. The Portfolios utilize the straight-line method of amortization of premiums and discounts for short-term securities (maturities less than one year) and the effective interest method for long-term securities (maturities greater than one year). Paydown gains and losses on mortgage and asset-backed securities are treated as an adjustment to interest income. For the period ended June 30, 2004, the Income Portfolio recognized a reduction of interest income and a reduction of net realized loss of $1,290 (in thousands). For the years ended December 31, 2003 and 2002, the Income Portfolio recognized a reduction in interest income and a reduction in net realized loss of $2,691 and $948 (in thousands), respectively. This reclassification has no effect on the net asset value of the Portfolio. Securities transactions are recorded on the trade date. Realized gains and losses from securities transactions are reported on an identified high basis. (e) Share Valuation and Dividends to Shareholders Shares are sold and redeemed on a continuous basis at net asset value. The net asset value per share is determined separately for each class by dividing the Portfolio's net assets attributable to that class by the number of shares of the class outstanding as of the close of regular trading on the New York Stock Exchange, which is generally 3:00 p.m. Central time (4:00 p.m. Eastern time), on each day the Exchange is open. Redemption fees may be applicable to redemptions within 60 days of purchase. The redemption fees collected by the Fund are netted against the amount of Redemptions for presentation on the Statement of Changes in Net Assets. Dividends from net investment income, if any, of the Growth, Tax-Managed Growth, Large Cap Growth, Small Cap Growth, Small-Mid Cap Growth, International Growth, International Equity, and Value Discovery Portfolios are declared at least annually. Dividends from the Income and the Ready Reserves Portfolios are declared monthly and daily, respectively. Capital gain distributions, if any, are declared at least annually in December. Dividends payable to shareholders are recorded on the ex-dividend date. 56 Semi-Annual Report June 30, 2004 The timing and characterization of certain income and capital gain distributions are determined annually in accordance with Federal income tax regulations that may differ from accounting principles generally accepted in the United States. As a result, net investment income or loss and net realized gain or loss for a reporting period may differ from the amount distributed during such period. In addition, the Portfolios may periodically record reclassifications among certain capital accounts to reflect differences between financial reporting and income tax basis distributions. The reclassifications were reported in order to reflect the tax treatment for certain permanent differences that exist between income tax regulations and accounting principles generally accepted in the United States. The reclassifications relate to net operating losses, Section 988 currency gains and losses, mortgage paydown securities gains and losses associated with securities issued before June 8, 1997 and recharacterization of dividends received from investments in REITs. These reclassifications have no impact on the net asset values of the Portfolios. Accordingly, at December 31, 2003, the following reclassifications were recorded (in thousands): Accumulated Undistributed Capital Undistributed Net Net Realized Paid In Excess Portfolio Investment Income/(Loss) Gain/ (Loss) of Par Value --------- ------------------------ ------------- ------------ Growth.............. $1,214 $ (54) $(1,160) Tax-Managed Growth.. 40 -- (40) Large Cap Growth.... 26 -- (26) Small Cap Growth.... 2,137 (2,137) -- Small-Mid Cap Growth -- -- -- International Growth (860) 860 -- Value Discovery..... 310 170 (480) Income.............. 2,683 (2,686) 3 Ready Reserves...... -- -- -- Distributions from net realized gains for book purposes may include short-term capital gains, which are included as ordinary income for tax purposes. The tax character of distribution in 2004, will be determined at the close of the fiscal year in December. The tax character of distributions paid during 2003 and 2002 was as follows (in thousands): Distributions Paid In 2003 Distributions Paid In 2002 - -------------------------- -------------------------- Ordinary Long-Term Ordinary Long-Term Portfolio Income Capital Gains Income Capital Gains --------- ------ ------------- ------ ------------- Growth.............. $ -- $ -- $ -- $-- Tax-Managed Growth.. -- -- -- -- Large Cap Growth.... -- -- -- -- Small Cap Growth.... 1,139 6,304 -- -- Small-Mid Cap Growth -- -- -- -- International Growth 2,775 -- -- -- Value Discovery..... -- -- -- -- Income.............. 13,802 -- 9,411 -- Ready Reserves...... 8,301 -- 17,472 -- As of December 31, 2003, the components of distributable earnings on a tax basis were as follows (in thousands): Accumulated Net Undistributed Capital and Undistributed Unrealized Ordinary Other Long-Term Appreciation / Portfolio Income Losses Gain (Depreciation) --------- ------ ------ ---- -------------- Growth.............. $ -- $ 29,466 $ -- $ 59,304 Tax-Managed Growth.. -- 2,331 -- 1,433 Large Cap Growth.... -- 5,592 -- 907 Small Cap Growth.... 2,198 -- 985 76,436 Small-Mid Cap Growth -- -- -- (21) International Growth 2,615 126,136 -- 431,476 Value Discovery..... -- -- 5,515 60,059 Income.............. 133 10,401 -- 4,780 Ready Reserves...... 81 1,148 -- -- (f) Options The Portfolios may engage in options transactions on security indices and other financial indices and in doing so achieve similar objectives to what they would achieve through the sale or purchase of options on individual securities or other instruments. June 30, 2004 William Blair Funds 57 Option writing. When the Portfolio writes an option, an amount equal to the premium received by the Portfolio is recorded as a liability and is subsequently adjusted to the current fair value of the option written. Premiums received from writing options that expire unexercised are treated by the Portfolio on the expiration date as realized gains from investments. The difference between the premium and the amount paid on effecting a closing purchase transaction, including brokerage commissions, is also treated as a realized gain, or, if the premium is less than the amount paid for the closing purchase transaction, as a realized loss. If a call option is exercised, the premium is added to the proceeds from the sale of the underlying security or currency in determining whether the Portfolio has realized a gain or loss. If a put option is exercised, the premium reduces the cost basis of the securities purchased by the Portfolio. The Portfolio as writer of an option bears the market risk of an unfavorable change in the price of the security underlying the written option. There were no open options at June 30, 2004. (g) Foreign Currency Translation and Foreign Currency Forward Contracts The International Growth and International Equity Portfolios may invest in securities denominated in foreign currencies. As such, assets and liabilities denominated in foreign currencies are translated into U.S. dollar amounts at the current exchange rate on the date of valuation. The Portfolios may enter into foreign currency forward contracts (1) as a means of managing the risks associated with changes in the exchange rates for the purchase or sale of a specific amount of a particular foreign currency, and (2) to hedge the value, in U.S. dollars, of portfolio securities. Gains and losses from foreign currency transactions associated with purchases and sales of investments and foreign currency forward contracts are included with the net realized and unrealized gain or loss on investments. (h) Income Taxes Each Portfolio intends to comply with the special provisions of the Internal Revenue Code available to regulated investment companies and, therefore, no provision for Federal income taxes has been made in the accompanying financial statements since each Portfolio intends to distribute substantially all of its taxable income to its shareholders and be relieved of all Federal income taxes. The cost of investments for Federal income tax purposes and related gross unrealized appreciation/(depreciation) and net unrealized appreciation/(depreciation) at June 30, 2004, were as follows (in thousands): Net Gross Gross Unrealized Cost of Unrealized Unrealized Appreciation / Portfolio Investments Appreciation Depreciation (Depreciation) --------- ----------- ------------ ------------ -------------- Growth.............. $ 223,124 $ 65,321 $14,151 $ 51,170 Tax-Managed Growth.. 4,562 1,422 160 1,262 Large Cap Growth.... 5,514 985 231 754 Small Cap Growth.... 544,008 123,085 19,691 103,394 Small-Mid Cap Growth 13,655 1,162 488 674 International Growth 2,089,257 465,076 44,546 420,530 International Equity 3,293 190 8 182 Value Discovery..... 209,045 62,598 6,592 56,006 Income.............. 264,245 4,137 3,766 371 Ready Reserves...... 1,047,631 -- -- -- At December 31, 2003, the following Portfolios have unused capital loss carryforwards available for Federal income tax purposes to be applied against future capital gains, if any. If not applied, the carryforwards will expire as follows (in thousands): Portfolio 2004 2005 2006 2007 2008 2009 2010 2011 Total - --------- ------ ------ ------ ------ ------ ------- ------- ------- -------- Growth.............. $ -- $ -- $ -- $ -- $ -- $ 4,332 $23,082 $ 2,032 $ 29,446 Tax-Managed Growth.. -- -- -- -- 94 732 1,037 468 2,331 Large Cap Growth.... -- -- -- -- 493 2,714 1,582 769 5,558 Small Cap Growth.... -- -- -- -- -- -- -- -- -- Small-Mid Cap Growth -- -- -- -- -- -- -- -- -- International Growth -- -- -- -- -- 31,564 59,888 34,482 125,934 Value Discovery..... -- -- -- -- -- -- -- -- -- Income.............. 2,156 -- -- 1,249 3,292 -- 1,692 1,582 9,971 Ready Reserves...... 108 1 1 51 24 -- 930 -- 1,115 The International Growth Portfolio has elected to mark-to-market its investments in Passive Foreign Investment Companies ("PFICs") for Federal income tax purposes. In accordance with this election, the Portfolio recognized net unrealized 58 Semi-Annual Report June 30, 2004 appreciation (depreciation) of $4,938 (in thousands) in 2003, all of which has been reclassified from unrealized gain (loss) on investments to undistributed net investment income. For the period November 1, 2003 through December 31, 2003, the following Portfolios incurred net realized capital or foreign currency losses. Each Portfolio intends to treat this loss as having occurred in fiscal year 2004 for Federal income tax purposes (in thousands): Portfolio Amount --------- ------ Growth.............. $ -- Tax-Managed Growth.. -- Large Cap Growth.... 34 Small Cap Growth.... -- Small-Mid Cap Growth -- International Growth 202 Value Discovery..... -- Income.............. 430 Ready Reserves...... 33 (i) Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the financial statements. Actual results may differ from those estimates. (2) Transactions with Affiliates (a) Management and Expense Limitation Agreements Each Portfolio has a management agreement with William Blair & Company L.L.C. (the "Company") for investment advisory, administrative, and other accounting services. Each Portfolio pays the Company an annual fee, payable monthly, based on a specified percentage of its average daily net assets. A summary of the annual rates expressed as a percentage of average daily net assets is as follows: Equity Portfolios International Portfolios - ----------------- - ------------------------ - Growth......................................... 0.75% International Growth and International Equity Tax-Managed Growth............................. 0.80% First $250 million......................... 1.10% Large Cap Growth............................... 0.80% In excess of $250 million.................. 1.00% Small Cap Growth............................... 1.10% Small-Mid Cap Growth........................... 1.00% Value Discovery................................ 1.15% Fixed Income Portfolio Money Market Portfolio - ---------------------- ---------------------- Income* Ready Reserves First $250 million............................ 0.25% First $250 million......................... 0.275% In excess of $250 million..................... 0.20% Next $250 million.......................... 0.250% - ---------- Next $2 billion............................ 0.225% *Management fee also includes a charge of 5% of In excess of $2.5 billion.................. 0.200% gross income. Some of the Portfolios have also entered into Expense Limitation Agreements with the Company. Under the terms of these Agreements, the Company has agreed to waive its advisory fees and absorb other operating expenses through April 30, 2005, if total expenses for each class of the following Portfolios exceed the following rates (as a percentage of average daily net assets): Class N Shares Class I Shares ------------------------- ------------------------- Through Effective Through Effective April 30, 2004 May 1, 2004 April 30, 2004 May 1, 2004 -------------- ----------- -------------- ----------- Tax-Managed Growth.. 1.55% 1.54% 1.30% 1.29% Large Cap Growth.... 1.45% 1.34% 1.20% 1.09% Small Cap Growth.... 1.55% 1.53% 1.38% 1.40% Small-Mid Cap Growth 1.54% 1.54% 1.29% 1.29% International Equity N/A 1.50% N/A 1.25% Value Discovery..... 1.49% 1.34% 1.33% 1.25% June 30, 2004 William Blair Funds 59 For a period of five years subsequent to the Commencement of Operations of each Fund, the Company is entitled to reimbursement from the Tax-Managed Growth, Large Cap Growth, and Small Cap Growth Portfolios for previously waived fees and expenses to the extent the overall expense ratio remains below the percentages indicated. As a result, the total expense ratio for the Portfolios during the period the agreement is in effect, will not fall below the percentages indicated. The total amount available for recapture at June 30, 2004 is $433 (in thousands) for Tax-Managed Growth, $415 for Large Cap Growth, and $0 for Small Cap Growth. The Small Cap Growth Portfolio reimbursed the Advisor $164,000, for the period ended June 30, 2004 and $186,000 for the year ended December 31, 2003. For a period of three years subsequent to the Commencement of Operations of the Small-Mid Cap Growth and the International Equity Portfolios, the Company is entitled to reimbursement for previously waived fees and expenses to the extent the overall expense ratio remains below the percentages indicated. The total amount available for recapture at June 30, 2004 is $68 (in thousands) for the Small-Mid Cap Growth Portfolio and $11 for the International Equity Portfolio. For the period ended June 30, 2004, the investment advisory fees incurred by the Portfolios and related fee waivers were as follows (in thousands) : Expenses (Recovered) or Gross Fee Net Absorbed Portfolio Advisory Fee Waiver Advisory Fee by Advisor --------- ------------ ------ ------------ ---------- Growth.............. $ 1,025 $-- $ 1,025 $ -- Tax-Managed Growth.. 25 20 5 -- Large Cap Growth.... 24 24 -- 3 Small Cap Growth.... 3,182 -- 3,182 (164) Small-Mid Cap Growth 45 45 -- 23 International Growth 11,347 -- 11,347 -- International Equity 3 3 -- 8 Value Discovery..... 1,410 -- 1,410 -- Income.............. 658 -- 658 -- Ready Reserves...... 1,334 -- 1,334 -- (b) Underwriting, Distribution Services and Service Agreement Each Portfolio except Ready Reserves Portfolio has a Distribution Agreement with the Company for distribution services. Each Portfolio pays the Company an annual fee, payable monthly, based on a specified percentage of its average daily net assets of specified share classes. The annual rates expressed as a percentage of average daily net assets for Class N is 0.25% for all Portfolios except the Income Portfolio, which is 0.15%. Pursuant to the Distribution Agreement, the Company enters into related selling group agreements with various firms at various rates for sales of the Portfolios' Class N shares. Distribution fees incurred by the Portfolios to the Company, for the period ended June 30, 2004, were as follows (in thousands): Gross Net Distribution Fee Distribution Portfolio Fees Waiver Fee --------- ------------ ------ ------------ Growth.............. $ 52 $-- $ 52 Tax-Managed Growth.. -- -- -- Large Cap Growth.... -- -- -- Small Cap Growth.... 462 -- 462 Small-Mid Cap Growth 4 -- 4 International Growth 2,054 -- 2,054 International Equity -- -- -- Value Discovery..... 37 23 14 Income.............. 40 -- 40 The Ready Reserves Portfolio has a Service Agreement with the Company to provide shareholder services and automatic sweep services. The Portfolio pays the Company an annual fee, payable monthly, based upon 0.35% of its average daily net assets. For the period ended June 30, 2004, the following fees were incurred (in thousands): Ready Reserves $1,929 60 Semi-Annual Report June 30, 2004 (c) Trustees Fees The Portfolios incurred fees of $129 (in thousands) to non-interested trustees of the Fund for the period ended June 30, 2004. Interested trustees are not compensated. (d) Investments in Affiliated Portfolio Pursuant to an Exemptive Order granted by the Securities and Exchange Commission in January, 2001, each of the Portfolios of the Fund may invest in the William Blair Ready Reserves Portfolio ("Ready Reserves"), an open-end money market portfolio managed by the Advisor. Ready Reserves Portfolio is used as a cash management option to the other Portfolios in the Fund. The Advisor waives management fees and shareholder service fees earned from the other Portfolios investment in the Ready Reserves Fund. The fees waived with respect to each Portfolio for the period ended June 30, 2004 are listed below. Distributions received from Ready Reserves are reflected as dividend income in each Portfolio's statement of operations. Amounts relating to the Portfolios' investments in Ready Reserves were as follows for the period ended June 30, 2004 (in thousands): Percent Sales Fees Dividend of Net Portfolio Purchases Proceeds Waived Income Value Assets --------- --------- -------- ------ -------- ------- ------- Growth.............. $ 35,563 $ 38,106 $ 7 $ 6 $ 3,273 1.2% Tax-Managed Growth.. 941 1,064 -- -- 2 0.1 Large Cap Growth.... 1,634 1,762 1 -- 107 1.7 Small Cap Growth.... 165,494 193,169 89 76 14,797 2.3 Small-Mid Cap Growth 9,442 8,761 -- 2 761 5.3 International Growth 136,438 212,025 153 132 23,483 0.9 International Equity 1,835 1,499 -- -- 336 9.7 Value Discovery..... 42,580 46,904 20 17 2,172 0.8 (3) Investment Transactions Investment transactions, excluding money market instruments, for the period ended June 30, 2004 were as follows (in thousands): Portfolio Purchases Sales --------- --------- -------- Growth.............. $ 46,582 $ 56,341 Tax-Managed Growth.. 690 1,827 Large Cap Growth.... 1,703 795 Small Cap Growth.... 336,529 249,858 Small-Mid Cap Growth 12,176 2,793 International Growth 1,586,293 931,285 International Equity 2,897 79 Value Discovery..... 63,297 44,338 Income.............. 59,224 49,442 (4) Foreign Currency Forward Contracts To protect itself against a decline in the value of foreign currency against the U.S. dollar, the International Growth and International Equity Portfolios enter into foreign currency forward contracts with its custodian and others. The Portfolios bear the market risk that arises from changes in foreign currency rates and bears the credit risk if the counterparty fails to perform under the contract. The net realized and unrealized gains and losses associated with foreign currency forward contracts are reflected in the accompanying financial statements. There were no open foreign currency forward contracts at June 30, 2004. June 30, 2004 William Blair Funds 61 (6) Fund Share Transactions The following table summarizes the activity in capital shares of each Portfolio (in thousands): Sales (Dollars) - - ---------------------------------------------------------------- Period Ended June 30, 2004 Year Ended December 31, 2003 - - ------------------------------ -------------------------------- Portfolio Class N Class I Total Class N Class I Total - --------- --------- -------- --------- ---------- -------- ---------- Growth.............. $ 9,380 $ 8,856 $ 18,236 $ 7,157 $ 21,956 $ 29,113 Tax-Managed Growth.. -- 131 131 36 1,123 1,159 Large Cap Growth.... 99 1,169 1,268 116 1,031 1,147 Small Cap Growth.... 91,575 48,765 140,340 298,425 101,709 400,134 Small Mid-Cap Growth 3,714 6,451 10,165 699 2,989 3,688 International Growth 548,239 227,009 775,248 758,408 254,587 1,012,995 International Equity 39 3,254 3,293 -- -- -- Value Discovery..... 11,716 31,352 43,068 3,825 49,356 53,181 Income.............. 18,103 20,894 38,997 48,173 90,922 139,095 Ready Reserves...... 811,071 -- 811,071 1,648,639 -- 1,648,639 Reinvested Distributions (Dollars) ---------------------------------------------------------------- Period Ended June 30, 2004 Year Ended December 31, 2003 ------------------------------ -------------------------------- Portfolio Class N Class I Total Class N Class I Total - --------- --------- -------- --------- ---------- -------- ---------- Growth.............. $ -- $ -- $ -- $ -- $ -- $ -- Tax-Managed Growth.. -- -- -- -- -- -- Large Cap Growth.... -- -- -- -- -- -- Small Cap Growth.... -- -- -- 4,718 2,482 7,200 Small Mid-Cap Growth -- -- -- -- -- -- International Growth -- -- -- 1,375 1,082 2,457 International Equity -- -- -- -- -- -- Value Discovery..... -- -- -- -- -- -- Income.............. 1,025 3,536 4,561 1,695 8,512 10,207 Ready Reserves...... 2,739 -- 2,739 8,334 -- 8,334 Redemptions (Dollars) ---------------------------------------------------------------- Period Ended June 30, 2004 Year Ended December 31, 2003 ------------------------------ -------------------------------- Portfolio Class N Class I Total Class N Class I Total - --------- --------- -------- --------- ---------- -------- ---------- Growth.............. $ 4,724 $ 20,775 $ 25,499 $ 8,875 $ 51,809 $ 60,684 Tax-Managed Growth.. 41 1,301 1,342 14 831 845 Large Cap Growth.... 30 434 464 104 2,058 2,162 Small Cap Growth.... 57,356 12,726 70,082 40,291 13,239 53,530 Small Mid-Cap Growth 55 33 88 -- -- -- International Growth 162,582 33,725 196,307 238,935 98,076 337,011 International Equity -- -- -- -- -- -- Value Discovery..... 3,688 25,797 29,485 12,601 60,972 73,573 Income.............. 7,879 25,964 33,843 23,206 52,035 75,241 Ready Reserves...... 920,487 -- 920,487 1,827,009 -- 1,827,009 Net Change in Net Assets relating to Fund Share Activity (Dollars) ---------------------------------------------------------------- Period Ended June 30, 2004 Year Ended December 31, 2003 ------------------------------ -------------------------------- Portfolio Class N Class I Total Class N Class I Total - --------- --------- -------- --------- ---------- -------- ---------- Growth.............. $ 4,656 $(11,919) $ (7,263) $ (1,718) $(29,853) $ (31,571) Tax-Managed Growth.. (41) (1,170) (1,211) 22 292 314 Large Cap Growth.... 69 735 804 12 (1,027) (1,015) Small Cap Growth.... 34,219 36,039 70,258 262,852 90,952 353,804 Small Mid-Cap Growth 3,659 6,418 10,077 699 2,989 3,688 International Growth 385,657 193,284 578,941 520,848 157,593 678,441 International Equity 39 3,254 3,293 -- -- -- Value Discovery..... 8,028 5,555 13,583 (8,776) (11,616) (20,392) Income.............. 11,249 (1,534) 9,715 26,662 47,399 74,061 Ready Reserves...... (106,677) -- (106,677) (170,036) -- (170,036) 62 Semi-Annual Report June 30, 2004 Sales (Shares) ---------------------------------------------------------- Period Ended June 30, 2004 Year Ended December 31, 2003 - - --------------------------- ----------------------------- Portfolio Class N Class I Total Class N Class I Total - --------- -------- ------- -------- --------- ------- --------- Growth.............. 958 870 1,828 824 2,476 3,300 Tax-Managed Growth.. -- 15 15 5 148 153 Large Cap Growth.... 17 194 211 22 201 223 Small Cap Growth.... 3,921 2,086 6,007 15,338 5,249 20,587 Small Mid-Cap Growth 364 631 995 70 299 369 International Growth 28,667 11,682 40,349 49,012 16,140 65,152 International Equity 4 325 329 -- -- -- Value Discovery..... 503 1,316 1,819 203 2,696 2,899 Income.............. 1,745 2,010 3,755 4,557 8,632 13,189 Ready Reserves...... 811,071 -- 811,071 1,648,639 -- 1,648,639 Reinvested Distributions (Shares) ---------------------------------------------------------- Period Ended June 30, 2004 Year Ended December 31, 2003 --------------------------- ----------------------------- Portfolio Class N Class I Total Class N Class I Total - --------- -------- ------- -------- --------- ------- --------- Growth.............. -- -- -- -- -- -- Tax-Managed Growth.. -- -- -- -- -- -- Large Cap Growth.... -- -- -- -- -- -- Small Cap Growth.... -- -- -- 226 118 344 Small Mid-Cap Growth -- -- -- -- -- -- International Growth -- -- -- 77 60 137 International Equity -- -- -- -- -- -- Value Discovery..... -- -- -- -- -- -- Income.............. 99 344 443 162 811 973 Ready Reserves...... 2,739 -- 2,739 8,334 -- 8,334 Redemptions (Shares) ---------------------------------------------------------- Period Ended June 30, 2004 Year Ended December 31, 2003 --------------------------- ----------------------------- Portfolio Class N Class I Total Class N Class I Total - --------- -------- ------- -------- --------- ------- --------- Growth.............. 468 2,045 2,513 1,027 5,796 6,823 Tax-Managed Growth.. 5 154 159 2 109 111 Large Cap Growth.... 5 73 78 20 415 435 Small Cap Growth.... 2,493 539 3,032 2,161 783 2,944 Small Mid-Cap Growth 6 2 8 -- -- -- International Growth 8,564 1,748 10,312 16,368 6,456 22,824 International Equity -- -- -- -- -- -- Value Discovery..... 159 1,097 1,256 767 3,409 4,176 Income.............. 764 2,514 3,278 2,198 4,957 7,155 Ready Reserves...... 920,487 -- 920,487 1,827,009 -- 1,827,009 Net Change in Shares Outstanding relating to Fund Share Activity (Shares) ---------------------------------------------------------- Period Ended June 30, 2004 Year Ended December 31, 2003 --------------------------- ----------------------------- Portfolio Class N Class I Total Class N Class I Total - --------- -------- ------- -------- --------- ------- --------- Growth.............. 490 (1,175) (685) (203) (3,320) (3,523) Tax-Managed Growth.. (5) (139) (144) 3 39 42 Large Cap Growth.... 12 121 133 2 (214) (212) Small Cap Growth.... 1,428 1,547 2,975 13,403 4,584 17,987 Small Mid-Cap Growth 358 629 987 70 299 369 International Growth 20,103 9,934 30,037 32,721 9,744 42,465 International Equity 4 325 329 -- -- -- Value Discovery..... 344 219 563 (564) (713) (1,277) Income.............. 1,080 (160) 920 2,521 4,486 7,007 Ready Reserves...... (106,677) -- (106,677) (170,036) -- (170,036) June 30, 2004 William Blair Funds 63 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- Growth Fund Class N - - ------------------------------------------------------- Period Ended Years Ended December 31, - - ------------ ----------------------------------------- 6/30/2004 2003 2002 2001 2000 1999 - - --------- ---- ---- ---- ---- ---- Net asset value, beginning of period..................... $ 9.97 $ 8.06 $ 10.87 $ 12.73 $20.10 $17.97 Income (loss) from investment operations: Net investment income (loss)........................... (0.03) (0.06) (0.07) (0.06) (0.06) (0.01) Net realized and unrealized gain (loss) on investments. 0.02 1.97 (2.74) (1.66) (1.52) 3.58 ------ ------ ------- ------- ------ ------ Total from investment operations......................... (0.01) 1.91 (2.81) (1.72) (1.58) 3.57 Less distributions from: Net investment income.................................. -- -- -- -- -- -- Net realized gain...................................... -- -- -- 0.14 5.79 1.44 ------ ------ ------- ------- ------ ------ Total distributions...................................... -- -- -- 0.14 5.79 1.44 ------ ------ ------- ------- ------ ------ Net asset value, end of period........................... $ 9.96 $ 9.97 $ 8.06 $ 10.87 $12.73 $20.10 ====== ====== ======= ======= ====== ====== Total return (%)......................................... (0.10) 23.70 (25.85) (13.53) (7.47) 19.98 Ratios to average daily net assets (%) (b): Expenses............................................... 1.18 1.19 1.19 1.18 1.13 0.86 Net investment income (loss)........................... (0.54) (0.67) (0.73) (0.57) (0.34) (0.11) Class I ------------------------------------------------------- Period Ended Years Ended December 31, ------------ ----------------------------------------- 6/30/2004 2003 2002 2001 2000 1999(a) --------- ---- ---- ---- ---- ------- Net asset value, beginning of period..................... $10.08 $ 8.12 $ 10.93 $ 12.77 $20.10 $17.98 Income (loss) from investment operations: Net investment income (loss)........................... (0.01) (0.04) (0.05) (0.04) (0.01) (0.01) Net realized and unrealized gain (loss) on investments. 0.01 2.00 (2.76) (1.66) (1.53) 3.57 ------ ------ ------- ------- ------ ------ Total from investment operations......................... -- 1.96 (2.81) (1.70) (1.54) 3.56 Less distributions from: Net investment income.................................. -- -- -- -- -- -- Net realized gain...................................... -- -- -- 0.14 5.79 1.44 ------ ------ ------- ------- ------ ------ Total distributions...................................... -- -- -- 0.14 5.79 1.44 ------ ------ ------- ------- ------ ------ Net asset value, end of period........................... $10.08 $10.08 $ 8.12 $ 10.93 $12.77 $20.10 ====== ====== ======= ======= ====== ====== Total return (%)......................................... 0.00 24.14 (25.71) (13.33) (7.27) 19.91 Ratios to average daily net assets (%) (b): Expenses............................................... 0.93 0.94 0.94 0.93 0.88 0.86 Net investment income (loss)........................... (0.29) (0.42) (0.48) (0.32) (0.06) (0.11) - - --------------------------------------------------------- Period Ended Years Ended December 31, - - ------------ -------------------------------------------- 6/30/2004 2003 2002 2001 2000 1999 - - --------- ---- ---- ---- ---- ---- Supplemental data for all classes: Net assets at end of period (in thousands). $274,613 $281,654 $255,625 $386,096 $550,987 $818,443 Portfolio turnover rate (%) (b)............ 34 45 29 74 88 52 - ---------- (a)For the period from October 1, 1999 (Commencement of the Class) to December 31, 1999. (b)Rates are annualized for periods that are less than a year. Past performance does not guarantee future results and current performance may be lower or higher than the data quoted. Results shown are annual returns, which assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. For the most current month-end performance information, please call 1-800-742-7272, or visit our Web site at www.williamblairfunds.com. Note: Net investment income (loss) per share for 2004, 2003, 2002, 2001 and 2000 is based on the average shares outstanding during the period. 64 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- Tax-Managed Growth Fund Class N - - -------------------------------------------------------- Period Ended Years Ended December 31, - - ------------ ------------------------------------------ 6/30/2004 2003 2002 2001 2000 1999(a) - - --------- ---- ---- ---- ---- ------- Net asset value, beginning of period.............................. $ 8.41 $ 6.86 $ 9.07 $ 10.08 $ 10.18 $10.00 Income (loss) from investment operations: Net investment income (loss).................................... (0.04) (0.07) (0.06) (0.05) (0.02) -- Net realized and unrealized gain (loss) on investments.......... 0.13 1.62 (2.15) (0.96) (0.08) 0.18 ------ ------ ------- ------- ------- ------ Total from investment operations.................................. 0.09 1.55 (2.21) (1.01) (0.10) 0.18 Less distributions from: Net investment income........................................... -- -- -- -- -- -- Net realized gain............................................... -- -- -- -- -- -- ------ ------ ------- ------- ------- ------ Total distributions............................................... -- -- -- -- -- -- ------ ------ ------- ------- ------- ------ Net asset value, end of period.................................... $ 8.50 $ 8.41 $ 6.86 $ 9.07 $ 10.08 $10.18 ====== ====== ======= ======= ======= ====== Total return (%).................................................. 1.07 22.59 (24.37) (10.02) (0.98) 1.80 Ratios to average daily net assets (%) (b): Expenses, net of waivers and reimbursements..................... 1.55 1.49 1.36 1.36 1.36 1.36 Expenses, before waivers and reimbursements..................... 2.19 2.26 2.22 3.64 11.34 1.36 Net investment income (loss), net of waivers and reimbursements. (1.02) (0.91) (0.72) (0.57) (0.15) 0.75 Net investment income (loss), before waivers and reimbursements. (1.66) (1.68) (1.58) (2.85) (10.13) 0.75 Class I -------------------------------------------------------- Period Ended Years Ended December 31, ------------ ------------------------------------------ 6/30/2004 2003 2002 2001 2000 1999(a) --------- ---- ---- ---- ---- ------- Net asset value, beginning of period.............................. $ 8.50 $ 6.92 $ 9.12 $ 10.11 $ 10.18 $10.00 Income (loss) from investment operations: Net investment income (loss)...................................... (0.03) (0.05) (0.04) (0.03) -- -- Net realized and unrealized gain (loss) on investments............ 0.14 1.63 (2.16) (0.96) (0.07) 0.18 ------ ------ ------- ------- ------- ------ Total from investment operations.................................. 0.11 1.58 (2.20) (0.99) (0.07) 0.18 Less distributions from: Net investment income........................................... -- -- -- -- -- -- Net realized gain............................................... -- -- -- -- -- -- ------ ------ ------- ------- ------- ------ Total distributions............................................... -- -- -- -- -- -- ------ ------ ------- ------- ------- ------ Net asset value, end of period.................................... $ 8.61 $ 8.50 $ 6.92 $ 9.12 $ 10.11 $10.18 ====== ====== ======= ======= ======= ====== Total return (%).................................................. 1.29 22.83 (24.12) (9.79) (0.69) 1.80 Ratios to average daily net assets (%) (b): Expenses, net of waivers and reimbursements..................... 1.30 1.24 1.11 1.11 1.11 1.11 Expenses, before waivers and reimbursements..................... 1.94 2.01 1.97 3.39 11.09 1.11 Net investment income (loss), net of waivers and reimbursements. (0.77) (0.66) (0.47) (0.32) 0.05 0.99 Net investment income (loss), before waivers and reimbursements. (1.41) (1.43) (1.33) (2.60) (9.93) 0.99 ----------------------------------------------- Period Ended Years Ended December 31, - - ------------ ---------------------------------- 6/30/2004 2003 2002 2001 2000 1999 - - --------- ---- ---- ---- ---- ---- Supplemental data for all classes: Net assets at end of period (in thousands). $5,720 $6,871 $5,303 $7,211 $5,001 $1,018 Portfolio turnover rate (%) (b)............ 22 37 44 37 32 -- - ---------- (a)For the period from December 27, 1999 (Commencement of Operations) to December 31, 1999. (b)Rates are annualized for periods that are less than a year. Past performance does not guarantee future results and current performance may be lower or higher than the data quoted. Results shown are annual returns, which assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. For the most current month-end performance information, please call 1-800-742-7272, or visit our Web site at www.williamblairfunds.com. Note: Net investment income (loss) per share for 2004, 2003, 2002, 2001 and 2000 is based on the average shares outstanding during the period. June 30, 2004 William Blair Funds 65 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- Large Cap Growth Fund Class N -------------------------------------------------------- Period Ended Years Ended December 31, ------------ ------------------------------------------ 6/30/2004 2003 2002 2001 2000 1999(a) --------- ---- ---- ---- ---- ------- Net asset value, beginning of period.............................. $ 5.93 $ 4.80 $ 6.72 $ 8.45 $ 10.14 $10.00 Income (loss) from investment operations: Net investment income (loss).................................... (0.02) (0.04) (0.04) (0.05) (0.05) -- Net realized and unrealized gain (loss) on investments.......... (0.03) 1.17 (1.88) (1.68) (1.64) 0.14 ------- ------- ------- ------- ------- ------ Total from investment operations.................................. (0.05) 1.13 (1.92) (1.73) (1.69) 0.14 Less distributions from: Net investment income........................................... -- -- -- -- -- -- Net realized gain............................................... -- -- -- -- -- -- ------- ------- ------- ------- ------- ------ Total distributions............................................... -- -- -- -- -- -- ------- ------- ------- ------- ------- ------ Net asset value, end of period.................................... $ 5.88 $ 5.93 $ 4.80 $ 6.72 $ 8.45 $10.14 ======= ======= ======= ======= ======= ====== Total return (%).................................................. (0.84) 23.54 (28.57) (20.47) (16.67) 1.40 Ratios to average daily net assets (%) (b): Expenses, net of waivers and reimbursements..................... 1.41 1.42 1.36 1.36 1.36 1.36 Expenses, before waivers and reimbursements..................... 2.31 2.39 2.45 3.01 2.84 1.36 Net investment income (loss), net of waivers and reimbursements. (0.61) (0.76) (0.71) (0.79) (0.58) (0.66) Net investment income (loss), before waivers and reimbursements................................................. (1.51) (1.73) (1.80) (2.44) (2.06) (0.66) Class I -------------------------------------------------------- Period Ended Years Ended December 31, ------------ ------------------------------------------ 6/30/2004 2003 2002 2001 2000 1999(a) --------- ---- ---- ---- ---- ------- Net asset value, beginning of period.............................. $ 5.99 $ 4.82 $ 6.74 $ 8.47 $ 10.14 $10.00 Income (loss) from investment operations: Net investment income (loss).................................... (0.01) (0.03) (0.03) (0.04) (0.04) -- Net realized and unrealized gain (loss) on investments.......... (0.04) 1.20 (1.89) (1.69) (1.63) 0.14 ------- ------- ------- ------- ------- ------ Total from investment operations.................................. (0.05) 1.17 (1.92) (1.73) (1.67) 0.14 Less distributions from: Net investment income........................................... -- -- -- -- -- -- Net realized gain............................................... -- -- -- -- -- -- ------- ------- ------- ------- ------- ------ Total distributions -- -- -- -- -- -- ------- ------- ------- ------- ------- ------ Net asset value, end of period.................................... $ 5.94 $ 5.99 $ 4.82 $ 6.74 $ 8.47 $10.14 ======= ======= ======= ======= ======= ====== Total return (%) (0.83) 24.27 (28.49) (20.43) (16.47) 1.40 Ratios to average daily net assets (%) (b): Expenses, net of waivers and reimbursements..................... 1.16 1.17 1.11 1.11 1.11 1.11 Expenses, before waivers and reimbursements..................... 2.06 2.14 2.20 2.76 2.59 1.11 Net investment income (loss), net of waivers and reimbursements. (0.36) (0.51) (0.46) (0.54) (0.35) (0.40) Net investment income (loss), before waivers and reimbursements................................................. (1.26) (1.48) (1.55) (2.19) (1.83) (0.40) -------------------------------------------------------- Period Ended Years Ended December 31, ------------ ------------------------------------------ 6/30/2004 2003 2002 2001 2000 1999 --------- ---- ---- ---- ---- ---- Supplemental data for all classes: Net assets at end of period (in thousands)...................... $6,268 $5,519 $5,469 $5,991 $10,995 $1,153 Portfolio turnover rate (%) (b)................................. 28 33 52 87 95 -- - ---------- (a)For the period from December 27, 1999 (Commencement of Operations) to December 31, 1999. (b)Rates are annualized for periods that are less than a year. Past performance does not guarantee future results and current performance may be lower or higher than the data quoted. Results shown are annual returns, which assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. For the most current month-end performance information, please call 1-800-742-7272, or visit our Web site at www.williamblairfunds.com. Note: Net investment income (loss) per share for 2004, 2003, 2002, 2001 and 2000 is based on the average shares outstanding during the period. 66 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- Small Cap Growth Fund Class N - - ---------------------------------------------------------- Period Ended Years Ended December 31, ------------ -------------------------------------------- 6/30/2004 2003 2002 2001 2000 1999 (a) - - --------- ---- ---- ---- ---- -------- Net asset value, beginning of period..................... $ 21.83 $ 13.72 $ 16.58 $ 13.16 $ 10.19 $10.00 Income (loss) from investment operations: Net investment income (loss)........................... (0.15) (0.21) (0.19) (0.17) (0.11) -- Net realized and unrealized gain (loss) on investments. 2.67 8.68 (2.67) 3.59 3.51 0.19 -------- -------- ------- ------- ------- ------ Total from investment operations......................... 2.52 8.47 (2.86) 3.42 3.40 0.19 Less distributions from: Net investment income.................................. -- -- -- -- -- -- Net realized gain...................................... -- 0.36 -- -- 0.43 -- -------- -------- ------- ------- ------- ------ Total distributions...................................... -- 0.36 -- -- 0.43 -- -------- -------- ------- ------- ------- ------ Net asset value, end of period........................... $ 24.35 $ 21.83 $ 13.72 $ 16.58 $ 13.16 $10.19 ======== ======== ======= ======= ======= ====== Total return (%)......................................... 11.54 61.88 (17.25) 25.99 33.68 1.90 Ratios to average daily net assets (%) (b): Expenses, net of waivers and reimbursements............ 1.53 1.55 1.56 1.59 1.60 1.60 Expenses, before waivers and reimbursements............ 1.50 1.52 1.62 1.95 2.17 1.60 Net investment income (loss), net of waivers and reimbursements........................................ (1.33) (1.22) (1.31) (1.15) (0.75) (1.60) Net investment income (loss), before waivers and reimbursements........................................ (1.30) (1.19) (1.37) (1.51) (1.32) (1.60) Class I ---------------------------------------------------------- Period Ended Years Ended December 31, ------------ -------------------------------------------- 6/30/2004 2003 2002 2001 2000 1999 (a) --------- ---- ---- ---- ---- -------- Net asset value, beginning of period..................... $ 22.03 $ 13.82 $ 16.65 $ 13.18 $ 10.19 $10.00 Income (loss) from investment operations: Net investment income (loss)........................... (0.13) (0.18) (0.16) (0.13) (0.11) -- Net realized and unrealized gain (loss) on investments. 2.70 8.75 (2.67) 3.60 3.53 0.19 -------- -------- ------- ------- ------- ------ Total from investment operations......................... 2.57 8.57 (2.83) 3.47 3.42 0.19 Less distributions from: Net investment income.................................. -- -- -- -- -- -- Net realized gain...................................... -- 0.36 -- -- 0.43 -- -------- -------- ------- ------- ------- ------ Total distributions...................................... -- 0.36 -- -- 0.43 -- -------- -------- ------- ------- ------- ------ Net asset value, end of period $ 24.60 $ 22.03 $ 13.82 $ 16.65 $ 13.18 $10.19 ======== ======== ======= ======= ======= ====== Total return (%)......................................... 11.67 62.15 (17.00) 26.33 33.87 1.90 Ratios to average daily net assets (%) (b): Expenses, net of waivers and reimbursements............ 1.28 1.35 1.31 1.34 1.35 1.35 Expenses, before waivers and reimbursements............ 1.25 1.28 1.37 1.70 1.92 1.35 Net investment income (loss), net of waivers and reimbursements........................................ (1.08) (1.02) (1.06) (0.90) (0.72) (1.35) Net investment income (loss), before waivers and reimbursements........................................ (1.05) (0.95) (1.12) (1.26) (1.29) (1.35) ---------------------------------------------------------- Period Ended Years Ended December 31, ------------ -------------------------------------------- 6/30/2004 2003 2002 2001 2000 1999 --------- ---- ---- ---- ---- ---- Supplemental data for all classes: Net assets at end of period (in thousands)............. $651,503 $518,824 $78,581 $54,658 $28,778 $6,346 Portfolio turnover rate (%) (b)........................ 88 103 133 147 433 -- - ---------- (a)For the period from December 27, 1999 (Commencement of Operations) to December 31, 1999. (b)Rates are annualized for periods that are less than a year. Past performance does not guarantee future results and current performance may be lower or higher than the data quoted. Results shown are annual returns, which assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. For the most current month-end performance information, please call 1-800-742-7272, or visit our Web site at www.williamblairfunds.com. Note: Net investment income (loss) per share for 2004, 2003, 2002, 2001 and 2000 is based on the average shares outstanding during the period. June 30, 2004 William Blair Funds 67 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- Small-Mid Cap Growth Fund Class N - - --------------------------------------- Period Ended Period Ended December 31, ------------ ------------------------- 6/30/2004 2003 (a) - - --------- -------- Net asset value, beginning of period.............................. $ 9.94 $10.00 Income (loss) from investment operations: Net investment income (loss).................................... (0.06) -- Net realized and unrealized gain (loss) on investments.......... 0.76 (0.06) ------- ------ Total from investment operations.................................. 0.70 (0.06) Less distributions from: Net investment income........................................... -- -- Net realized gain............................................... -- -- ------- ------ Total distributions............................................... -- -- ------- ------ Net asset value, end of period.................................... $ 10.64 $ 9.94 ======= ====== Total return (%).................................................. 7.04 (0.60) Ratios to average daily net assets (%) (b): Expenses, net of waivers and reimbursements..................... 1.54 1.54 Expenses, before waivers and reimbursements..................... 2.99 1.54 Net investment income (loss), net of waivers and reimbursements. (1.25) (1.54) Net investment income (loss), before waivers and reimbursements. (2.70) (1.54) Class I --------------------------------------- Period Ended Period Ended December 31, ------------ ------------------------- 6/30/2004 2003 (a) --------- -------- Net asset value, beginning of period.............................. $ 9.94 $10.00 Income (loss) from investment operations: Net investment income (loss).................................... (0.05) -- Net realized and unrealized gain (loss) on investments.......... 0.76 (0.06) ------- ------ Total from investment operations.................................. 0.71 (0.06) Less distributions from: Net investment income........................................... -- -- Net realized gain............................................... -- -- ------- ------ Total distributions............................................... -- -- ------- ------ Net asset value, end of period.................................... $ 10.65 $ 9.94 ======= ====== Total return (%).................................................. 7.14 (0.60) Ratios to average daily net assets (%) (b): Expenses, net of waivers and reimbursements..................... 1.29 1.29 Expenses, before waivers and reimbursements..................... 2.74 1.29 Net investment income (loss), net of waivers and reimbursements. (1.00) (1.29) Net investment income (loss), before waivers and reimbursements. (2.45) (1.29) --------------------------------------- Period Ended Period Ended December 31, ------------ ------------------------- 6/30/2004 2003 --------- ---- Supplemental data for all classes: Net assets at end of period (in thousands)...................... $14,436 $3,673 Portfolio turnover rate (%) (b)................................. 69 -- - ---------- (a)For the period from December 29, 2003 (Commencement of Operations) to December 31, 2003. (b)Rates are annualized for periods that are less than a year. Past performance does not guarantee future results and current performance may be lower or higher than the data quoted. Results shown are annual returns, which assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. For the most current month-end performance information, please call 1-800-742-7272, or visit our Web site at www.williamblairfunds.com. Note: Net investment income (loss) per share for 2004 and 2003 is based on the average shares outstanding during the period. 68 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- International Growth Fund Class N - - ---------------------------------------------------- Period Ended Years Ended December 31, - - ------------ --------------------------------------- 6/30/2004 2003 2002 2001 2000 1999 - - --------- ---- ---- ---- ---- ---- Net asset value, beginning of period..................... $18.65 $13.13 $ 15.48 $ 17.93 $24.03 $14.62 Income (loss) from investment operations: Net investment income (loss) (a)....................... 0.02 0.02 (0.05) (0.02) (0.01) (0.04) Net realized and unrealized gain (loss) on investments. 0.53 5.52 (2.30) (2.43) (2.04) 13.94 ------ ------ ------- ------- ------ ------ Total from investment operations......................... 0.55 5.54 (2.35) (2.45) (2.05) 13.90 Less distributions from: Net investment income.................................. -- 0.02 -- -- 0.08 -- Net realized gain...................................... -- -- -- -- 3.97 4.49 ------ ------ ------- ------- ------ ------ Total distributions...................................... -- 0.02 -- -- 4.05 4.49 ------ ------ ------- ------- ------ ------ Net asset value, end of period........................... $19.20 $18.65 $ 13.13 $ 15.48 $17.93 $24.03 ====== ====== ======= ======= ====== ====== Total return (%)......................................... 2.95 42.21 (15.18) (13.66) (8.10) 96.25 Ratios to average daily net assets (%) (c): Expenses............................................... 1.47 1.50 1.51 1.60 1.59 1.35 Net investment income (loss)........................... 0.18 0.05 (0.36) (0.11) (0.44) (0.43) Class I - - ----------------------------------------------------- Period Ended Years Ended December 31, - - ------------ ---------------------------------------- 6/30/2004 2003 2002 2001 2000 1999 (b) - - --------- ---- ---- ---- ---- -------- Net asset value, beginning of period..................... $18.85 $13.27 $ 15.60 $ 18.02 $24.03 $20.25 Income (loss) from investment operations: Net investment income (loss) (a)....................... 0.04 0.09 (0.01) 0.02 0.03 (0.04) Net realized and unrealized gain (loss) on investments. 0.55 5.54 (2.32) (2.44) (2.03) 8.31 ------ ------ ------- ------- ------ ------ Total from investment operations......................... 0.59 5.63 (2.33) (2.42) (2.00) 8.27 Less distributions from: Net investment income.................................. -- 0.05 -- -- 0.04 -- Net realized gain...................................... -- -- -- -- 3.97 4.49 ------ ------ ------- ------- ------ ------ Total distributions...................................... -- 0.05 -- -- 4.01 4.49 ------ ------ ------- ------- ------ ------ Net asset value, end of period........................... $19.44 $18.85 $ 13.27 $ 15.60 $18.02 $24.03 ====== ====== ======= ======= ====== ====== Total return (%) 3.13 42.42 (14.94) (13.43) (7.87) 41.71 Ratios to average daily net assets (%) (c): Expenses............................................... 1.22 1.25 1.26 1.35 1.34 1.35 Net investment income (loss)........................... 0.43 0.30 (0.11) 0.14 (0.16) (0.43) - - ----------------------------------------------------------- Period Ended Years Ended December 31, - - ------------ ---------------------------------------------- 6/30/2004 2003 2002 2001 2000 1999 - - --------- ---- ---- ---- ---- ---- Supplemental data for all classes: Net assets at end of period (in thousands). $2,536,318 $1,899,699 $778,788 $454,055 $333,888 $302,089 Portfolio turnover rate (%) (c)............ 85 57 73 112 116 122 - ---------- (a)Includes $0.03, $0.00, $0.00, $0.06 and $0.00 in PFIC transactions which are treated as ordinary income for Federal tax purposes for the years 2003, 2002, 2001, 2000 and 1999, respectively. (b)For the period from October 1, 1999 (Commencement of the Class) to December 31, 1999. (c)Rates are annualized for periods that are less than a year. Past performance does not guarantee future results and current performance may be lower or higher than the data quoted. Results shown are annual returns, which assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. For the most current month-end performance information, please call 1-800-742-7272, or visit our Web site at www.williamblairfunds.com. Note: Net investment income (loss) per share for 2004, 2003, 2002, 2001 and 2000 is based on the average shares outstanding during the period. June 30, 2004 William Blair Funds 69 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- International Equity Fund Class N - - ------------------------------ Period Ended June 30, 2004 (a) ------------------------------ Net asset value, beginning of period.............................. $10.00 Income (loss) from investment operations: Net investment income (loss).................................... (0.01) Net realized and unrealized gain (loss) on investments.......... 0.57 ------ Total from investment operations.................................. 0.56 Less distributions from: Net investment income........................................... -- Net realized gain............................................... -- ------ Total distributions............................................... -- ------ Net asset value, end of period.................................... $10.56 ====== Total return (%).................................................. 5.60 Ratios to average daily net assets (%) (b): Expenses, net of waivers and reimbursements..................... 1.50 Expenses, before waivers and reimbursements..................... 1.90 Net investment income (loss), net of waivers and reimbursements. (0.72) Net investment income (loss), before waivers and reimbursements. (1.12) Class I ------------------------------ Period Ended June 30, 2004 (a) ------------------------------ Net asset value, beginning of period.............................. $10.00 Income (loss) from investment operations: Net investment income (loss).................................... -- Net realized and unrealized gain (loss) on investments.......... 0.56 ------ Total from investment operations.................................. 0.56 Less distributions from: Net investment income........................................... -- Net realized gain............................................... -- ------ Total distributions............................................... -- ------ Net asset value, end of period.................................... $10.56 ====== Total return (%).................................................. 5.60 Ratios to average daily net assets (%) (b): Expenses, net of waivers and reimbursements..................... 1.25 Expenses, before waivers and reimbursements..................... 1.65 Net investment income (loss), net of waivers and reimbursements. (0.47) Net investment income (loss), before waivers and reimbursements. (0.87) ------------------------------ Period Ended June 30, 2004 ------------------------------ Supplemental data for all classes: Net assets at end of period (in thousands)...................... $3,474 Portfolio turnover rate (%) (b)................................. 16 - ---------- (a)For the period from May 24, 2004 (Commencement of Operations) to June 30, 2004. (b)Rates are annualized for periods that are less than a year. Past performance does not guarantee future results and current performance may be lower or higher than the data quoted. Results shown are annual returns, which assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. For the most current month-end performance information, please call 1-800-742-7272, or visit our Web site at www.williamblairfunds.com. Note: Net investment income (loss) per share for 2004 is based on the average shares outstanding during the period. 70 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- Value Discovery Fund Class N - - ----------------------------------------------------------- Period Ended Years Ended December 31, - - ------------ --------------------------------------------- 6/30/2004 2003 2002 2001 2000 1999 - - --------- ---- ---- ---- ---- ---- Net asset value, beginning of period.............................. $ 22.68 $ 16.28 $ 18.23 $ 16.20 $ 13.66 $ 12.96 Income (loss) from investment operations: Net investment income (loss).................................... -- (0.06) (0.03) 0.08 0.05 0.10 Net realized and unrealized gain (loss) on investments.......... 1.19 6.46 (1.92) 2.74 2.52 0.69 -------- -------- -------- -------- ------- ------- Total from investment operations.................................. 1.19 6.40 (1.95) 2.82 2.57 0.79 Less distributions from: Net investment income........................................... -- -- -- 0.03 0.03 0.09 Net realized gain............................................... -- -- -- 0.76 -- -- -------- -------- -------- -------- ------- ------- Total distributions............................................... -- -- -- 0.79 0.03 0.09 -------- -------- -------- -------- ------- ------- Net asset value, end of period.................................... $ 23.87 $ 22.68 $ 16.28 $ 18.23 $ 16.20 $ 13.66 ======== ======== ======== ======== ======= ======= Total return (%).................................................. 5.25 39.31 (10.70) 17.39 18.85 6.10 Ratios to average daily net assets (%) (b): Expenses, net of waivers and reimbursements..................... 1.38 1.49 1.53 1.61 1.64 1.35 Expenses, before waivers and reimbursements..................... 1.49 1.58 1.53 1.66 1.88 1.38 Net investment income (loss), net of waivers and reimbursements. 0.00 (0.30) (0.16) 0.28 0.40 0.78 Net investment income (loss), before waivers and reimbursements................................................. (0.11) (0.39) (0.16) 0.23 0.16 0.75 Class I ----------------------------------------------------------- Period Ended Years Ended December 31, ------------ --------------------------------------------- 6/30/2004 2003 2002 2001 2000 1999 (a) --------- ---- ---- ---- ---- -------- Net asset value, beginning of period.............................. $ 22.76 $ 16.31 $ 18.19 $ 16.16 $ 13.64 $ 12.36 Income (loss) from investment operations: Net investment income (loss).................................... 0.02 (0.03) 0.01 0.17 0.09 0.10 Net realized and unrealized gain (loss) on investments.......... 1.20 6.48 (1.89) 2.70 2.52 1.28 -------- -------- -------- -------- ------- ------- Total from investment operations.................................. 1.22 6.45 (1.88) 2.87 2.61 1.38 Less distributions from: Net investment income........................................... -- -- -- 0.08 0.09 0.10 Net realized gain............................................... -- -- -- 0.76 -- -- -------- -------- -------- -------- ------- ------- Total distributions............................................... -- -- -- 0.84 0.09 0.10 -------- -------- -------- -------- ------- ------- Net asset value, end of period.................................... $ 23.98 $ 22.76 $ 16.31 $ 18.19 $ 16.16 $ 13.64 ======== ======== ======== ======== ======= ======= Total return (%).................................................. 5.36 39.55 (10.34) 17.72 19.16 11.18 Ratios to average daily net assets (%) (b): Expenses, net of waivers and reimbursements..................... 1.24 1.33 1.34 1.36 1.39 1.35 Expenses, before waivers and reimbursements..................... 1.24 1.33 1.34 1.41 1.63 1.38 Net investment income (loss), net of waivers and reimbursements. 0.14 (0.14) 0.03 0.53 0.61 0.78 Net investment income (loss), before waivers and reimbursements................................................. 0.14 (0.14) 0.03 0.48 0.37 0.75 ----------------------------------------------------------- Period Ended Years Ended December 31, ------------ --------------------------------------------- 6/30/2004 2003 2002 2001 2000 1999 --------- ---- ---- ---- ---- ---- Supplemental data for all classes: Net assets at end of period (in thousands)...................... $263,214 $237,111 $190,802 $149,292 $74,093 $48,423 Portfolio turnover rate (%) (b)................................. 36 51 20 48 68 65 - ---------- (a)For the period from October 1, 1999 (Commencement of the Class) to December 31, 1999. (b)Rates are annualized for periods that are less than a year. Past performance does not guarantee future results and current performance may be lower or higher than the data quoted. Results shown are annual returns, which assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. For the most current month-end performance information, please call 1-800-742-7272, or visit our Web site at www.williamblairfunds.com. Note: Net investment income (loss) per share for 2004, 2003, 2002, 2001 and 2000 is based on the average shares outstanding during the period. June 30, 2004 William Blair Funds 71 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- Income Fund Class N - - -------------------------------------------------- Period Ended Years Ended December 31, - - ------------ ------------------------------------ 6/30/2004 2003 2002 2001 2000 1999 - - --------- ---- ---- ---- ---- ---- Net asset value, beginning of period..................... $10.43 $10.62 $10.34 $10.22 $ 9.92 $10.49 Income (loss) from investment operations: Net investment income (loss) (a)....................... 0.32 0.40 0.55 0.55 0.62 0.62 Net realized and unrealized gain (loss) on investments. (0.36) (0.02) 0.25 0.17 0.33 (0.59) ------ ------ ------ ------ ------ ------ Total from investment operations......................... (0.04) 0.38 0.80 0.72 0.95 0.03 Less distributions from: Net investment income.................................. 0.24 0.57 0.52 0.60 0.65 0.60 Net realized gain...................................... -- -- -- -- -- -- ------ ------ ------ ------ ------ ------ Total distributions...................................... 0.24 0.57 0.52 0.60 0.65 0.60 ------ ------ ------ ------ ------ ------ Net asset value, end of period........................... $10.15 $10.43 $10.62 $10.34 $10.22 $ 9.92 ====== ====== ====== ====== ====== ====== Total return (%)......................................... (0.44) 3.68 7.91 7.18 9.99 0.34 Ratios to average daily net assets (%) (c): Expenses............................................... 0.76 0.77 0.81 0.94 0.92 0.70 Net investment income (loss)........................... 4.17 4.09 5.23 5.38 6.23 6.03 Class I -------------------------------------------------- Period Ended Years Ended December 31, ------------ ------------------------------------ 6/30/2004 2003 2002 2001 2000 1999 (b) --------- ---- ---- ---- ---- -------- Net asset value, beginning of period..................... $10.40 $10.62 $10.35 $10.24 $ 9.91 $10.05 Income (loss) from investment operations: Net investment income (loss) (a)....................... 0.35 0.43 0.57 0.58 0.64 0.62 Net realized and unrealized gain (loss) on investments. (0.38) (0.04) 0.24 0.15 0.34 (0.15) ------ ------ ------ ------ ------ ------ Total from investment operations......................... (0.03) 0.39 0.81 0.73 0.98 0.47 Less distributions from: Net investment income.................................. 0.25 0.61 0.54 0.62 0.65 0.61 Net realized gain...................................... -- -- -- -- -- -- ------ ------ ------ ------ ------ ------ Total distributions...................................... 0.25 0.61 0.54 0.62 0.65 0.61 ------ ------ ------ ------ ------ ------ Net asset value, end of period........................... $10.12 $10.40 $10.62 $10.35 $10.24 $ 9.91 ====== ====== ====== ====== ====== ====== Total return (%)......................................... (0.33) 3.76 8.04 7.32 10.28 0.30 Ratios to average daily net assets (%) (c): Expenses............................................... 0.61 0.62 0.66 0.79 0.77 0.70 Net investment income (loss)........................... 4.32 4.24 5.38 5.53 6.39 6.03 --------------------------------------------------------- Period Ended Years Ended December 31, ------------ -------------------------------------------- 6/30/2004 2003 2002 2001 2000 1999 --------- ---- ---- ---- ---- ---- Supplemental data for all classes: Net assets at end of period (in thousands). $267,298 $265,062 $196,136 $176,264 $167,746 $173,375 Portfolio turnover rate (%) (c)............ 36 36 66 82 54 66 - ---------- (a)As required, in 2001, the Fund has adopted the provisions of the AICPA Audit and Accounting Guide for Investment Companies and began treating any paydown gain or losses on mortgage and asset backed securities as an adjustment to income. The effect of this change for the year 2003, was to decrease net investment income per share by $0.12 and increase the net realized and unrealized gain loss per share by $0.12. It decreases the Ratio of Net Investment Income to average net assets from 5.21% to 4.09% for Class N and from 5.36% to 4.24% for Class I shares. The effect of this change for the year 2002 and 2001 was to decrease net investment income per share by $.05 and increase the net realized and unrealized gain and loss per share by $.05. It decreases the Ratio of Net Investment Income to Average Net Assets from 5.75% to 5.23% and from 5.87% to 5.38% for Class N for 2002 and 2001, respectively. It decreased the Ratio of Net Investment Income from 5.90% to 5.38% and 6.02% to 5.53% for Class I shares for 2002 and 2001, respectively. Per share amounts and the Ratio of Net Investment Income to Average Net Assets for periods prior to December 31, 2001 have not been restated to reflect this change in presentation. (b)For the period October 1, 1999 (Commencement of the Class) to December 31, 1999. (c)Rates are annualized for periods that are less than a year. Past performance does not guarantee future results and current performance may be lower or higher than the data quoted. Results shown are annual returns, which assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. For the most current month-end performance information, please call 1-800-742-7272, or visit our Web site at www.williamblairfunds.com. Note: Net investment income (loss) per share for 2004, 2003, 2002, 2001 and 2000 is based on the average shares outstanding during the period. 72 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- Ready Reserves Fund Class N - - ------------------------------------------------------------------- Period Ended Years Ended December 31, - - ------------ ------------------------------------------------------ 6/30/2004 2003 2002 2001 2000 1999 - - --------- ---- ---- ---- ---- ---- Net asset value, beginning of period......... $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 Income (loss) from investment operations: Net investment income (loss)............... 0.00 0.01 0.01 0.04 0.06 0.05 ---------- ---------- ---------- ---------- ---------- ---------- Total from investment operations............. 0.00 0.01 0.01 0.04 0.06 0.05 Less distributions from: Net investment income...................... 0.00 0.01 0.01 0.04 0.06 0.05 ---------- ---------- ---------- ---------- ---------- ---------- Total distributions.......................... 0.00 0.01 0.01 0.04 0.06 0.05 ---------- ---------- ---------- ---------- ---------- ---------- Net asset value, end of period............... $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 $ 1.00 ========== ========== ========== ========== ========== ========== Total return (%) 0.25 0.66 1.28 3.66 5.91 4.63 Ratios to average daily net assets (%) (a): Expenses................................... 0.66 0.66 0.67 0.67 0.70 0.72 Net investment income (loss)............... 0.53 0.66 1.28 3.63 5.78 4.52 Supplemental data: Net assets at end of period (in thousands). $1,047,225 $1,153,932 $1,324,001 $1,403,740 $1,339,180 $1,052,803 - ---------- (a)Rates are annualized for periods that are less than a year. Past performance does not guarantee future results and current performance may be lower or higher than the data quoted. Results shown are annual returns, which assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. For the most current month-end performance information, please call 1-800-742-7272, or visit our Web site at www.williamblairfunds.com. June 30, 2004 William Blair Funds 73 Trustees and Officers. The trustees and officers of the William Blair Funds, their ages, their principal occupations during the last five years, their affiliations, if any, with William Blair & Company, L.L.C., and other significant affiliations are set forth below. The address of each trustee and officer is 222 West Adams Street, Chicago, Illinois 60606. Number of Portfolios Term of in Fund Position(s) Office and Principal Complex Held with Length of Occupation(s) Overseen Other Directorships Name and Age Fund Time Served During Past 5 Years by Trustee Held by Trustee/Officer - ------------ ----------- ----------- ------------------------- ---------- --------------------------------------- Interested Trustees Conrad Fischer, 70* Chairman Since 1987 Principal, William Blair 12 Trustee Emeritus, Chicago Child Care of the & Company, L.L.C.; Society, a non-profit organization, and Board of Partner, APM Limited Partner, APM Limited Partnership Trustees Partnership Michelle Seitz, 38* Trustee Since 2002 Principal, William Blair 12 N/A & Company, L.L.C. Non-Interested Trustees J. Grant Beadle, 71 Trustee Since 1997 Retired Chairman and 12 Batts Group and Oliver Products Chief Executive Officer, Company, manufacturer of products Union Special for the medical device, food and Corporation, industrial grahics markets, Retired Associate sewing machine Director, Northwestern University manufacturer Institute for The Learning Sciences. Theodore A. Bosler, 69 Trustee Since 1997 Retired Principal and 12 Crystal Lake Watershed Fund, Desert Vice President, Lincoln Foothills Land Trust and Institute of Capital Management Chartered Financial Analysts. Ann P. McDermott, 64 Trustee Since 1996 Board member and 12 Junior League of Chicago, officer for various civic Northwestern University, Women's and charitable Board; Ravinia Festival Women's organizations over the Board; Rush Presbyterian St. Luke's past thirty years; Medical Center, Women's Board; professional experience University of Chicago, Women's prior thereto, registered Board; Visiting Nurses Association, representative for New Honorary Director York Stock Exchange firm John B. Schwemm, 69 Trustee Since 1990 Retired Chairman and 12 USG Corp., building material Chief Executive Officer, manufacturer, and Walgreen Co. R.R. Donnelley & Sons Company Donald L. Seeley, 60 Trustee Since 2003 Director, Applied 12 Beverly Enterprises, Inc., provider of Investment Management eldercare and rehabilitative services; Program, University of Modem Media, Inc., interactive Arizona Department of services company Finance, Formerly Vice Chairman and Chief Financial Officer, True North Communications, Inc., marketing communications and advertising firm Robert E. Wood II, 65 Trustee Since 1999 Retired Executive 12 Chairman, Add-Vision, Inc. Vice President, Morgan manufacturer of surface animation Stanley Dean Witter systems, and Micro-Combustion, LLC Officers Marco Hanig, 46 President Since 1999 Principal, William Blair N/A N/A & Company, L.L.C.; former Senior Vice President, First Chicago NBD 74 Semi-Annual Report June 30, 2004 Number of Portfolios Term of in Fund Position(s) Office and Principal Complex Held with Length of Occupation(s) Overseen Other Directorships Name and Age Fund Time Served During Past 5 Years by Trustee Held by Trustee/Officer - ------------ ----------- ----------- ------------------------ ---------- ------------------------------- Michael P. Balkin, 45 Senior Vice Since 2000 Principal, William Blair N/A Exceed Corp. President & Company, L.L.C. Rocky Barber, 52 Senior Vice Since 2001 Principal, William Blair N/A YMCA of Metropolitan Chicago President & Company, L.L.C. Chief 1999-2001 Executive Officer Karl W. Brewer, 37 Senior Vice Since 2000 Principal, William Blair N/A N/A President & Company, L.L.C. Harvey H. Bundy, III, 59 Senior Vice Since 2003 Principal, William Blair N/A N/A President & Company, L.L.C. Mark A. Fuller, III, 47 Senior Vice Since 1993 Principal, William Blair N/A Partner, Fulsen Howney Partners President & Company, L.L.C. W. George Greig, 51 Senior Vice Since 1996 Principal, William Blair N/A N/A President & Company, L.L.C. Michael A. Jancosek, 44 Senior Vice Since 2004 Principal, William Blair N/A N/A President & Company L.L.C. Since 2000 Vice Associate, William Blair President & Company, L.L.C.; former Vice President, First Chicago NBD John F. Jostrand, 50 Senior Vice Since 1999 Principal, William Blair N/A N/A President & Company, L.L.C. James S. Kaplan, 43 Senior Vice Since 2004 Principal, William Blair N/A N/A President & Company, L.L.C. Since 1995 Vice Associate, William Blair President & Company, L.L.C. Robert C. Lanphier, IV, 47 Senior Vice Since 2003 Principal, William Blair N/A Chairman, AG. Med, Inc. President & Company, L.L.C. David S. Mitchell, 44 Senior Vice Since 2004 Principal, William Blair N/A N/A President & Company, L.L.C. Since 2003 Vice Associate, William Blair President & Company, L.L.C. Capucine E. Price, 39 Senior Vice Since 2004 Principal, William Blair N/A N/A President & Company L.L.C. Vice Since 2003 President Associate, William Blair & Company, L.L.C. Gregory J. Pusinelli, 45 Senior Vice Since 1999 Principal, William Blair N/A N/A President & Company, L.L.C.; former Principal and Vice President, Stein Roe & Farnham Incorporated Norbert W. Truderung, 51 Senior Vice Since 1992 Principal, William Blair N/A N/A President & Company, L.L.C. Jeffrey A. Urbina, 49 Senior Vice Since 1998 Principal, William Blair N/A N/A President & Company, L.L.C. June 30, 2004 William Blair Funds 75 Number of Portfolios Term of in Fund Position(s) Office and Principal Complex Held with Length of Occupation(s) Overseen Other Directorships Name and Age Fund Time Served During Past 5 Years by Trustee Held by Trustee/Officer - ------------ ----------- ----------- ------------------------ ---------- ----------------------- Christopher T. Vincent, 49 Senior Vice Since 2004 Principal, William Blair N/A Uhlich Children's Home President & Company, L.L.C. Since 2002 Vice Associate, William Blair President & Company, L.L.C.; former Managing Director/Senior Portfolio Manager, Zurich Scudder Investments Terence M. Sullivan, 60 Vice Since 1997 Associate, William Blair N/A N/A President & Company, L.L.C. and Treasurer Colette M. Garavalia, 43 Secretary Since 2000 Associate, William Blair N/A N/A & Company, L.L.C.; former Assistant Vice President, Scudder Kemper Investments - ---------- * Mr. Fischer and Ms. Seitz are interested persons of the William Blair Funds because each is a principal of William Blair & Company, L.L.C., the Funds' investment advisor and principal underwriter. The Statement of Additional Information for the William Blair Funds includes additional information about the trustees and is available without charge by calling 1-800-635-2886 (in Massachusetts 1-800-635-2840) or by writing the Fund. 76 Semi-Annual Report June 30, 2004 Proxy Voting A description of the policies and procedures that the Fund uses to determine how to vote proxies relating to portfolio securities and information regarding how the Fund voted proxies relating to portfolio securities for the most recent 12-month period ended June 30 are available without charge, upon request, by calling 1-800-635-2886 (in Massachusetts 1-800-635-2840), at www.williamblairfunds.com and on the SEC's website at http://www.sec.gov. Quarterly Portfolio Schedules The Fund will file its complete schedule of portfolio holdings with the SEC for the first and third fiscal quarters of each fiscal year (quarters ended March 31 and September 30) on Form N-Q. The Fund's Forms N-Q will be available on the SEC's website at http://www.sec.gov and may be reviewed and copied at the SEC's Public Reference Room in Washington, D.C. Information on the operation of the SEC's Public Reference Room may be obtained by calling 1-800-SEC-0330. June 30, 2004 William Blair Funds 77 - -------------------------------------------------------------------------------- BOARD OF TRUSTEES - -------------------------------------------------------------------------------- Conrad Fischer, Chairman Principal, William Blair & Company, L.L.C. J. Grant Beadle Retired Chairman and CEO, Union Special Corporation Theodore A. Bosler Retired Principal and Vice President, Lincoln Capital Management Company Ann P. McDermott Director and Trustee Profit and not-for-profit organizations Donald L. Seeley Adjunct Lecturer and Director, University of Arizona Department of Finance John B. Schwemm Retired Chairman and CEO, R.R. Donnelley & Sons Company Michelle Seitz Principal, William Blair & Company, L.L.C., Robert E. Wood II Retired Executive Vice President, Morgan Stanley Dean Witter - -------------------------------------------------------------------------------- Officers - -------------------------------------------------------------------------------- Marco Hanig, President Michael P. Balkin, Senior Vice President Rocky Barber, Senior Vice President Karl W. Brewer, Senior Vice President Harvey H. Bundy III, Senior Vice President Mark A. Fuller, III, Senior Vice President W. George Greig, Senior Vice President Michael A. Jancosek, Senior Vice President John F. Jostrand, Senior Vice President James S. Kaplan, Senior Vice President Robert C. Lanphier, IV, Senior Vice President David S. Mitchell, Senior Vice President Capucine E. Price, Senior Vice President Gregory J. Pusinelli, Senior Vice President Norbert W. Truderung, Senior Vice President Jeffrey A. Urbina, Senior Vice President Christopher T. Vincent, Senior Vice President Terence M. Sullivan, Vice President and Treasurer Colette M. Garavalia, Secretary Investment Advisor William Blair & Company, L.L.C. Legal Counsel Vedder, Price, Kaufman & Kammholz, P.C. Transfer Agent State Street Bank and Trust Company P.O. Box 8506 Boston, MA 02266-8506 For customer assistance, call 1-800-635-2886 (Massachusetts 1-800-635-2840) 78 Date of First Use August, 2004 [LOGO APPEARS HERE] WILLIAM BLAIR FUNDS GROWTH FUNDS Growth Fund Tax-Managed Growth Fund Large Cap Growth Fund Small Cap Growth Fund Small-Mid Cap Growth Fund International Growth Fund International Equity Fund OTHER FUNDS Value Discovery Fund Income Fund Ready Reserves Fund 222 West Adams Street Chicago, Illinois 60606 800.742.7272 www.williamblairfunds.com William Blair & Company, L.L.C., Distributors [Logo Appears Here] WILLIAM BLAIR FUNDS INSTITUTIONAL INTERNATIONAL GROWTH FUND SEMI-ANNUAL REPORT - -------------------------------------------------------------------------------- JUNE 30, 2004 - -------------------------------------------------------------------------------- Table of Contents - -------------------------------------------------------------------------------- Institutional International Growth Fund An Overview from the Portfolio Manager. 2 Portfolio of Investments............... 5 Financial Statements..................... 8 Notes to Financial Statements............ 11 Board of Trustees........................ 20 Officers................................. 20 This report is submitted for the general information of the shareholders of the William Blair Funds. It is not authorized for distribution to prospective investors unless accompanied or preceded by a prospectus of the William Blair Funds. Please consider the Funds' investment objectives, risks, charges, and expenses before investing. This and other information is contained in the Funds' prospectus, which you may obtain by calling 1-800-742-7272. Read it carefully before you invest or send money. (C)William Blair & Company, LLC., distributor. June 30, 2004 William Blair Funds 1 [PHOTO] GREIG W. George Greig - -------------------------------------------------------------------------------- INSTITUTIONAL INTERNATIONAL GROWTH FUND - -------------------------------------------------------------------------------- The Institutional International Growth Fund invests primarily in common stocks of foreign growth companies of all sizes. - -------------------------------------------------------------------------------- AN OVERVIEW FROM THE PORTFOLIO MANAGER - -------------------------------------------------------------------------------- How did the Fund perform over the last year? The Institutional International Growth Fund posted a 3.01% gain for the 6 months ended June 30, 2004. By comparison, the Fund's benchmark, the MSCI All Country World (Free) excluding US Index, rose 4.10%. What were the most significant factors impacting Fund performance? What factors were behind the Fund's underperformance versus the benchmark? The overall MSCI All Country World (Free) except US index fell modestly (0.69)% during the second quarter, but a more severe correction in Asian markets and in cyclical sectors globally impacted our relative performance. On a regional basis, our relative emphasis on Asia (particularly emerging Asia) at the expense of Europe accounted for all of the portfolio's performance shortfall at mid-year. Asian markets continue to be viewed as extremely sensitive to global liquidity and cyclical growth, but it is worth noting that there has been no evidence of any significant slowdown in either economic growth or corporate earnings up to this point. The year started with international markets extending the strong rally that began in 2003 into the first quarter. Broadly speaking, Asian markets and emerging markets more generally outperformed, and small companies continued to outpace large blue chip companies. Within that framework, however, shifting returns reflected new data about the changing dynamic of the global growth cycle. The major new trend to emerge in the first quarter was the increasing strength of Japan, both in economic and market terms. After lagging the rest of the world early in the year, Japan came to life as more and more indicators pointed to continued strong earnings growth and increasing confidence in the economy. Our portfolio benefited from being overweight the benchmark in Japan, but relative returns were impacted by our emphasis on export-oriented sectors. The global equity market climate shifted during the second quarter, as heightened concern about monetary tightening in the US and a state-directed slowdown in China focused attention on potential risks to economic and profit growth, particularly in cyclical sectors and regions. What sectors had the biggest impact on portfolio performance? Technology was the major laggard on a global basis during the second quarter, reversing some of 2003's strong gains as cyclical concerns arose regarding potential oversupply of components and the sustainability of corporate and consumer spending growth in a variety of hardware categories. Conversely, the best performing sector in the global market was Energy, and portfolio positioning in these sectors also detracted from performance. The portfolio continues to carry relatively low exposure to Europe, a position that helped returns during the first quarter, as growth indicators remain inconsistent and relatively weak in most European economies. 2 Semi-Annual Report June 30, 2004 What is your outlook for the international markets? In both of the recent broad global economic cycles (1981-1990 and 1991-2000) there was a sharp recovery, followed by a moderation of growth accompanied by some monetary tightening. In each case the initial tightening occurred in the '4' year (1984, 1994), and so the analogy is drawn that after the liquidity-driven upturn of 2003, we should anticipate upward pressure on interest rates, and that China and the US--the engines of global growth--could slow significantly. Leading economic indicators, many of them monetary, have indeed slowed on a global basis, and some measures of investment spending and credit growth have decelerated in China. While it is still too early to tell definitively how mild or severe the coming slowdown will be, markets have readily anticipated a relatively bearish scenario. Ironically, until there is clearer evidence of the extent and effects of the slowdown, markets may overreact on the basis of fear of the unknown. Our view of the mid-cycle plateau is that it may well be milder and briefer than the tightening cycle of 1994-95. There are few excesses in the global economic picture and a diminished likelihood of instability in emerging markets. As Asia cools down and Europe begins to reaccelerate, global growth should move into better balance for the remainder of the economic expansion. June 30, 2004 William Blair Funds 3 - -------------------------------------------------------------------------------- Institutional International Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Performance Highlights - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Annual Total Return -------------------------------------- 6/30/2004(a) 12/31/2003 2002(a)(b) ------------ ---------- ---------- Institutional International Growth Fund Morgan Stanley Capital................. 3.01% 42.47% (4.27)% International (MSCI) All Country World Free Ex-US Index...................... 4.10 41.41 (0.86) -------------------------------------- Average Annual Total Return at 6/30/2004 -------------------------------------- Since 1 Year Inception(c) ------------ ------------ - Institutional International Growth Fund 31.64% 19.22% -------------------------------------- (a)Total return is not annualized for periods that are less than one year. (b)For the period from July 26, 2002 (Commencement of Operations) to December 31, 2002. (c)For the period from July 26, 2002 (Commencement of Operations) to June 30, 2004. Illustration of an assumed investment of $10,000 with reinvestment of income dividends [CHART] Institutional MSCI AC International WLD Ex-US Growth Fund Index --------------- ----------- 7/26/02 10,000 10,000 9/02 9,300 9,300 12/02 9,600 9,900 3/03 9,000 9,200 6/03 10,700 11,000 9/03 11,900 12,000 12/03 13,600 14,000 3/04 14,400 14,700 6/04 14,000 14,600 Past performance does not guarantee future results and current performance may be lower or higher than the data quoted. Total returns shown assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. For the most current month-end performance information, please call 1-800-742-7272, or visit our Web site at www.williamblairfunds. com. International investing involves special risk considerations, including currency fluctuations, lower liquidity, economic and political risk. The performance highlights and graph presented above do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The Morgan Stanley Capital International (MSCI) All Country World Free ex-US Index is an unmanaged index that includes developed and emerging markets and reduced Japanese portion, making it more comparable to the Institutional International Growth Fund in terms of investment approach. This report identifies the Fund's investments on June 30, 2004. These holdings are subject to change. Not all stocks in the Fund performed the same, nor is there any guarantee that these stocks will perform as well in the future. Market forecasts provided in this report may not necessarily come to pass. 4 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Institutional International Growth Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) - ------------------------------------------------------- --------- Shares Value - --------- --------------------------------------------- --------- - ------------------------------------------------------- --------- Common Stocks--Europe--24.9% Austria--1.4% 66,200 Erste Bank Der Oester (Banking).............. $ 10,439 --------- Estonia--0.2% 216,400 Hansabank (Banking).......................... 1,827 --------- Finland--0.5% 40,500 Nokian Renkaat Oyj (Automotive).............. 3,959 --------- France--4.7% 118,300 Christian Dior (Apparel and luxury goods).... 7,695 37,300 Hermes International SCA (Apparel & luxury goods)...................................... 7,496 354,300 *JC Decaux (Media)........................... 7,626 56,200 Klepierre (Real estate)...................... 3,857 55,500 Mr. Bricolage SA (Home improvement--retail).................. 1,831 130,800 *Opera (Hospital and nursing management)..... 3,379 19,200 Rodriquez Group (Retail trade)............... 1,009 50,000 Sanofi-Synthelabo SA (Pharmaceuticals)....... 3,176 --------- 36,069 --------- Germany--4.7% 174,800 Bayer Motoren Werke (Motor vehicles)......... 7,797 67,900 Did Deutscher Industrie Svc (Commercial services)................................... 1,999 65,800 GFK AG (Commercial services)................. 2,315 20,800 Puma AG (Consumer non-durables).............. 5,330 111,700 SAP AG (Software)............................ 18,653 --------- 36,094 --------- Greece--2.4% 313,100 Coca-Cola Hellenic Bottling S.A. (Beverages)................................. 7,349 169,700 EFG Eurobank (Banking)....................... 3,715 105,200 Folli Follie S.A. (Apparel and footwear retailer)................................... 3,369 164,190 National Bank of Greece (Banking)............ 3,589 --------- 18,022 --------- Ireland--1.0% 314,700 Anglo Irish Bank plc (Finance)............... 4,945 352,000 *Grafton Group (Wholesale distributors)...... 2,815 --------- 7,760 --------- Italy--2.4% 563,200 Banco Popolare Di Verona E N (Banking)....... 9,718 390,200 Credito Emiliano SpA (Banking)............... 3,219 153,100 Merloni Elettrodemestici SpA (Electronics and appliances)................................. 2,735 74,300 Pirelli & C Real Estate (Real estate development)................................ 2,792 --------- 18,464 --------- Spain--1.2% 82,800 Banco Popular Espanol (Banking).............. 4,685 112,100 Grupo Ferrovial S.A. (Industrial services)... 4,680 --------- 9,365 --------- Sweden--2.2% 4,082,000 *Ericsson LM-B Shares (Communications equipment).................................. 12,212 182,200 Gunnebo AB (Producer manufacturing).......... 2,067 - ------------------------------------------------------- --------- Shares Value - --------- --------------------------------------------- --------- - ------------------------------------------------------- --------- Common Stocks--Europe--24.9%--(continued) 58,900 *Oriflame Cosmetics S.A. SDR (Household products)................................... $ 2,104 --------- 16,383 --------- Switzerland--4.2% 28,600 *Actelion (Biotechnology).................... 3,297 68,000 *Logitech International S.A. (Electronic technology)................................. 3,113 48,483 *Micronas Semiconductor (Electronic technology)................................. 2,216 12,200 Serono S.A., Class "B" (Biotechnology)....... 7,712 224,800 UBS AG (Banking)............................. 15,938 --------- 32,276 --------- Common Stocks--United Kingdom--20.3% 380,900 *Acambis (Biotechnology)..................... 2,410 147,100 Astrazeneca plc (Pharmaceuticals)............ 6,645 2,198,700 BG Group plc (Industrial services)........... 13,621 1,269,000 *British Sky Broadcasting Group (Media)...... 14,385 1,337,000 Capita Group plc (Commercial services)....... 7,774 279,100 Carnival plc (Hotels, restaurants and leisure activities)................................. 13,634 484,600 Cattle's Holdings plc (Finance and leasing).. 2,804 150,000 Cobham plc (Aerospace & defense)............. 3,823 1,056,000 Compass Group plc (Hotels, restaurants and leisure activities)......................... 6,494 296,300 French Connection (Apparel and footwear retail)..................................... 2,244 611,800 HBOS plc (Finance)........................... 7,631 207,400 MAN Group plc (Finance)...................... 5,406 228,400 McCarthy & Stone plc (Real estate)........... 2,421 1,573,600 *Michael Page International (Personnel Services)................................... 5,142 202,200 Next plc (Multiline retail).................. 5,251 844,200 Premier Farnell (Electronics distributors)... 3,789 423,300 Reckitt Benckiser plc (Household products)... 12,066 863,300 Smith & Nephew plc (Health care equipment and supplies)............................... 9,362 676,700 Standard Chartered plc (Banking)............. 11,089 3,303,800 Tesco plc (Food retailer).................... 16,057 262,800 Warner Chilcott plc (Pharmaceuticals)........ 3,320 --------- 155,368 --------- Common Stocks--Canada--5.8% 196,800 *Alimentation Couche-Tard--Class "B" (Food retail)..................................... 3,443 139,300 *Cognos Inc. (Software)...................... 5,026 44,200 *MacDonald Dettwiler & Associates (IT consulting)................................. 860 386,100 Manulife Financial Corp. (Life and health insurance).................................. 15,624 91,500 *Precision Drilling Corp. (Drilling)......... 4,366 71,400 *Research in Motion Ltd. (Wireless telecommunication).......................... 4,890 148,500 *Shoppers Drug Mart Corp. (Retail trade)..... 3,713 262,600 Suncor Energy, Inc. (Energy minerals)........ 6,687 --------- 44,609 --------- Common Stocks--Japan--24.8% 70,300 Aeon Credit Service Co., Ltd. (Consumer finance).................................... 4,716 61,500 Aeon Mall Co., Ltd. (Real estate)............ 3,673 67,700 Arnest One Corp. (Real estate)............... 2,057 49,600 Askul Corporation (Retail trade)............. 3,131 See accompanying Notes to Financial Statements. June 30, 2004 William Blair Funds 5 - -------------------------------------------------------------------------------- Institutional International Growth Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) - ------------------------------------------------------- --------- Shares Value - ---------- -------------------------------------------- --------- Common Stocks--Japan--24.8%--(continued) 287,400 Canon, Inc. (Office electronics)............ $ 15,349 561,500 *Chiyoda Corp. (Construction)............... 4,026 15,000 Don Quijote Co., Ltd. (Multiline retail).... 957 102,500 Fast Retailing (Specialty retail)........... 8,373 1,037,300 Hino Motors Ltd. (Trucks, construction and farm machinery)............................ 7,558 90,400 Hoya Corporation (Electronic technology).... 9,534 42,400 Kappa Create Co., Ltd. (Consumer non- durables).................................. 2,942 40,590 Keyence Corporation (Electronic technology)................................ 9,322 14,400 Koha Co., Ltd. (Electronic equipment and instruments)............................... 544 92,500 Matsui Securities Co., Ltd. ( Financial services).................................. 3,193 114,800 Misumi Corp. (Trading companies and distributors).............................. 3,777 1,651 Mitsubishi Tokyo Financial (Banking)........ 15,455 35,000 Nakanishi Inc. (Medical specialties)........ 2,510 65,000 Neomax Co., Ltd. (Electronic equipment and instruments)............................... 1,059 75,100 Nidec Corporation (Electronic equipment and instruments)............................... 7,754 62,340 Nitori Company Ltd. (Specialty stores)...... 3,919 155,000 Nitto Denko Corporation (Electronic technology)................................ 8,009 97,600 Orix Corporation (Consumer finance)......... 11,264 84,900 Park 24 Co., Ltd. (Commercial services)..... 3,249 957 Pasona Inc. (Personnel services)............ 3,438 88,590 Point Inc. (Apparel and footwear retail).... 2,406 58,300 Sawai Pharmaceutical Co., Ltd. (Pharmaceuticals).......................... 2,467 731,900 Sharp Corp. (Electronics)................... 11,797 908,000 *Shinsei Bank, Ltd. (Banking)............... 5,805 66,100 SMC Corporation (Trucks, construction and farm machinery)............................ 7,213 69,300 Sugi Pharmacy (Food and staple retailing)... 2,849 1,732,000 Sumitomo Trust & Banking Co. (Finance)...... 12,497 529,000 Toto Ltd. (Building products)............... 5,599 36,600 USS Co., Ltd. (Commercial services)......... 3,167 --------- 189,609 --------- Common Stocks--Emerging Asia--7.6% China--0.4% 4,506,000 Zhejiang Expressway Holding Co. (Transportation infrastucture)............. 3,213 India--3.0% 119,800 Bharat Forge Ltd. (Machinery)............... 1,599 282,400 *Biocon Ltd. (Biotechnology)................ 3,082 378,500 HDFC Bank (Banking)......................... 3,055 277,300 Housing Development Finance Corp. (Financial services).................................. 3,120 52,207 Infosys Technologies, Ltd. (Consulting and software services)......................... 6,330 87,700 ING Vysya Bank, Ltd. (Banking).............. 706 441,600 *Maruti Udyog Ltd. (Automobiles)............ 3,878 230,000 Mphasis BFL, Ltd. (Information technology).. 1,311 --------- 23,081 --------- Indonesia--0.8% 18,564,000 *Bank Rakyat Indonesia (Banking)............ 3,307 - ------------------------------------------------------- -------- Shares Value - ---------- -------------------------------------------- -------- Common Stocks--Emerging Asia--7.6%--(continued) 7,164,000 Unilever Indonesia Tbk (Household and personal care)............................. $ 3,002 -------- 6,309 -------- South Korea--2.2% 115,200 Hyundai Motor Co., Ltd. (Automobiles)....... 4,457 29,700 Samsung Electronics Co. (Semiconductors).... 12,348 -------- 16,805 -------- Taiwan--0.9% 5,750,448 EVA Airways Corp. (Airlines)................ 2,416 1,108,000 Hon Hai Precision Industry (Computers)...... 4,146 -------- 6,562 -------- Thailand--0.3% 2,938,000 *Tisco Finance (Finance, rental and leasing) 1,957 -------- Common Stocks--Asia--5.9% Australia--2.5% 290,700 Bendigo Bank Ltd. (Banking)................. 1,918 404,900 Billabong International Ltd. (Apparel and luxury goods).............................. 2,343 202,400 Macquarie Bank, Ltd. (Financial services)... 4,815 70,000 Perpetual Trustees Australia (Investment managers).................................. 2,305 481,800 Sigma Company, Ltd. (Medical distributors).. 2,765 679,500 Toll Holdings, Ltd. (Trucking).............. 5,102 -------- 19,248 -------- Hong Kong--3.1% 5,038,000 China Insurance International (Insurance)... 2,243 21,778,000 Cnooc Ltd. (Oil and gas).................... 9,232 891,000 Esprit Holdings Ltd. (Apparel, footwear and retail).................................... 3,999 2,148,250 Global Bio-Chem Technol (Food products)..... 1,200 1,836,500 Li & Fung (Distribution services)........... 2,697 2,432,000 Techtronic Industries Co. (Consumer durables).................................. 3,893 -------- 23,264 -------- Singapore--0.4% 2,522,200 Osim International Ltd. (Consumer sundries). 1,564 2,031,000 Unisteel Technology, Ltd. (Electronic components)................................ 1,578 -------- 3,142 -------- Common Stocks--Latin America--3.8% Brazil--0.3% 123,400 *Natura Cosmeticos S.A. (Cosmetics)......... 1,984 -------- Chile--1.2% 124,900 *Cencosud S.A.--ADR 144A (Retail stores).... 2,312 205,300 Lan Chile S.A.--ADR (Airlines).............. 3,962 1,316,600 S.A.C.I. Falabella (Department stores)...... 2,591 -------- 8,865 -------- Mexico--2.3% 4,616,700 America Movil S.A. (Communications)......... 8,402 648,000 *Consorcio Ara S.A (Homebuilding)........... 1,869 466,000 *Urbi Desarrollos Urbanos S.A. (Household durables).................................. 1,502 See accompanying Notes to Financial Statements. 6 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Institutional International Growth Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) - --------------------------------------------------- -------- Shares Value - ----------- --------------------------------------- -------- - --------------------------------------------------- -------- Common Stocks--Latin America--3.8%--(continued) 1,894,000 Walmart de Mexico (Retail trade)....... $ 5,627 -------- 17,400 -------- Common Stocks--Emerging Europe, Mid-East, Africa--3.8% Egypt--0.7% 207,000 Orascom Contruction Industry (Construction)........................ 3,073 280,300 *Orascom Telecommunication Holding GDR (Telecommunications).................. 2,595 -------- 5,668 -------- Israel--1.0% 111,000 Teva Pharmaceutical Inds.--ADR (Pharmaceuticals)..................... 7,469 -------- Poland--0.4% 94,400 Bank Pekao S.A. (Banking).............. 3,170 -------- South Africa--1.3% 126,000 Edgars Consolidated Stores (Apparel, footwear and retail).................. 3,028 947,700 *MTN Group Ltd. (Telecommunication services)............................. 4,386 3,647,500 Network Healthcare Holdings (Health services)............................. 2,635 -------- 10,049 -------- Turkey--0.4% 142,958,101 *Enka Insaat (Industrial conglomerates) 2,938 -------- Total Common Stock--96.9% (cost $641,099)................................... 741,368 -------- - -------------------------------------------- -------- Shares Value - ---------- --------------------------------- -------- - -------------------------------------------- -------- Preferred Stock Brazil--1.3% 73,910,000 Banco Itau Holding (Banking)..... $ 6,813 273,520 Geradau S.A. (Steel)............. 3,278 -------- Total Preferred Stock--1.3% (cost $8,385)............................... 10,091 -------- Investment in Affiliate 2,164,170 William Blair Ready Reserves Fund 2,164 -------- Total Investments in Affiliate--0.3% (cost $2,164)............................... 2,164 -------- Short-Term Investments 7,099,000 American Express Demand Note, VRN 1.17% due 7/1/04................ 7,099 -------- Total Short-term Investments--0.9% (cost $7,099)............................... 7,099 -------- Total Investments--99.4% (cost $658,747)............................. 760,722 Cash and other assets, less liabilities--0.6% 4,245 -------- Net assets--100.0%........................... $764,967 ======== - ---------- * Non-income producing securities ADR = American Depository Receipt GDR = Global Depository Receipt All securities excluding those traded on exchanges in this hemisphere, are fair valued pursuant to Valuation Procedures adopted by the Board of Trustees. At June 30, 2004 the Fund's Portfolio of Investments includes the following industry categories: Financials................ 26.8% Consumer Discretionary.... 21.5% Information Technology.... 15.2% Industrials and Services.. 12.0% Healthcare................ 8.0% Consumer Staples.......... 7.8% Energy.................... 4.5% Telecommunication Services 2.7% Materials................. 1.5% ------ 100.0% ====== At June 30, 2004 the Fund's Portfolio of Investments includes the following currency categories: Japanese Yen.......... 25.2% British Pound Sterling 20.7% Euro.................. 18.9% Canadian Dollar....... 5.9% Swiss Franc........... 4.3% Hong Kong Dollar...... 3.5% Indian Rupee.......... 3.1% Australian Dollar..... 2.6% Mexico Nuevo Peso..... 2.3% South Korean Won...... 2.2% Swedish Krona......... 2.2% United States Dollar.. 2.2% Brazilian Real........ 1.6% South African Rand.... 1.3% All other currencies.. 4.0% ------ 100.0% ====== See accompanying Notes to Financial Statements. June 30, 2004 William Blair Funds 7 - -------------------------------------------------------------------------------- Statement of Assets and Liabilities - -------------------------------------------------------------------------------- June 30, 2004 (all dollar amounts in thousands) (unaudited) Institutional International Growth Fund Assets Investments in securities, at cost.................................. $ 656,583 Investments in Affiliated Fund, at cost............................. 2,164 ----------- Investments in securities, at value................................. $ 758,558 Investments in Affiliated Fund, at value............................ 2,164 Foreign currency, at value (cost $193).............................. 188 Receivable for investment securities sold........................... 13,288 Receivable from Advisor............................................. 54 Dividends and interest receivable................................... 704 ----------- Total assets................................................. 774,956 Liabilities Payable for investment securities purchased......................... 9,157 Payable for fund shares redeemed.................................... 96 Management fee payable.............................................. 625 Other accrued expenses.............................................. 111 ----------- Total liabilities............................................ 9,989 ----------- Net Assets.................................................. $ 764,967 =========== Capital Composition of Net Assets: Par value of shares of beneficial interest........................ $ 55 Capital paid in excess of par value............................... 658,294 Undistributed net investment income (loss)........................ 285 Accumulated net realized loss..................................... 4,368 Net unrealized appreciation of investments and foreign currencies. 101,965 ----------- Net Assets.................................................. $ 764,967 =========== Net Assets........................................................ $ 764,967 Shares Outstanding................................................ 54,589,033 Net Asset Value Per Share......................................... $ 14.01 See accompanying Notes to Financial Statements. 8 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Statement of Operations - -------------------------------------------------------------------------------- for the Period Ended June 30, 2004 (all dollar amounts in thousands) (unaudited) Institutional International Growth Fund Investment income Dividends.................................................................................................... $ 6,005 Less foreign tax withheld.................................................................................... (643) Interest..................................................................................................... 128 ------- Total income............................................................................................... 5,490 Expenses Investment advisory fees..................................................................................... 3,185 Custodian fees............................................................................................... 375 Professional fees............................................................................................ 27 Transfer agent fees.......................................................................................... 21 Registration fees............................................................................................ 22 Other expenses............................................................................................... 51 ------- Total expenses before waiver............................................................................... 3,681 Less expenses waived and absorbed by the Advisor........................................................... (103) ------- Net expenses............................................................................................... 3,578 ------- Net investment income...................................................................................... 1,912 Net realized and unrealized loss on investments, foreign currency transactions and other assets and liabilities Net realized gain on investments........................................................................... 9,799 Net realized loss on foreign currency transactions and other assets and liabilities........................ (3,119) ------- Total net realized gain.................................................................................... 6,680 Change in net unrealized appreciation on investments and other assets and liabilities.......................... 6,320 ------- Net increase in net assets resulting from operations........................................................... $14,912 ======= See accompanying Notes to Financial Statements. June 30, 2004 William Blair Funds 9 - -------------------------------------------------------------------------------- Statements of Changes in Net Assets - -------------------------------------------------------------------------------- for the Period Ended June 30, 2004 and the Year Ended December 31, 2003 (all amounts in thousands) (unaudited) Institutional International Growth Fund 6/30/2004 - - --------- Operations Net investment income (loss)................................................................................. $ 1,912 Net realized gain (loss) on investments, foreign currency transactions and other assets and liabilities...... 6,680 Change in net unrealized appreciation (depreciation) on investments, foreign currency transactions and other assets and liabilities...................................................................................... 6,320 -------- Net increase (decrease) in net assets resulting from operations.............................................. 14,912 Distributions to shareholders from Net investment income........................................................................................ -- Net realized gain............................................................................................ -- -------- -- Capital stock transactions Net proceeds from sale of shares............................................................................. 291,710 Shares issued in reinvestment of income dividends and capital gain distributions............................. -- Less cost of shares redeemed................................................................................. (19,166) -------- Net increase (decrease) in net assets resulting from capital stock transactions.............................. 272,544 -------- Increase (decrease) in net assets............................................................................ 287,456 Net assets Beginning of the period...................................................................................... 477,511 -------- End of the period............................................................................................ $764,967 ======== Undistributed net investment income (loss) at the end of the period............................................ $ 285 ======== Capital stock transactions Shares sold.................................................................................................. 20,855 Shares issued in reinvestment of income dividends and capital gain distributions............................. -- Less shares redeemed......................................................................................... (1,365) -------- Change from capital stock transactions......................................................................... 19,490 ======== 2003 - - -------- Operations Net investment income (loss)................................................................................. $ 861 Net realized gain (loss) on investments, foreign currency transactions and other assets and liabilities...... 1,169 Change in net unrealized appreciation (depreciation) on investments, foreign currency transactions and other assets and liabilities...................................................................................... 94,217 -------- Net increase (decrease) in net assets resulting from operations.............................................. 96,247 Distributions to shareholders from Net investment income........................................................................................ (1,120) Net realized gain............................................................................................ -- -------- (1,120) Capital stock transactions Net proceeds from sale of shares............................................................................. 247,919 Shares issued in reinvestment of income dividends and capital gain distributions............................. 1,069 Less cost of shares redeemed................................................................................. (16,452) -------- Net increase (decrease) in net assets resulting from capital stock transactions.............................. 232,536 -------- Increase (decrease) in net assets............................................................................ 327,663 Net assets Beginning of the period...................................................................................... 149,848 -------- End of the period............................................................................................ $477,511 ======== Undistributed net investment income (loss) at the end of the period............................................ $ (1,627) ======== Capital stock transactions Shares sold.................................................................................................. 20,772 Shares issued in reinvestment of income dividends and capital gain distributions............................. 82 Less shares redeemed......................................................................................... (1,412) -------- Change from capital stock transactions......................................................................... 19,442 ======== See accompanying Notes to Financial Statements. 10 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Notes to Financial Statements - -------------------------------------------------------------------------------- (1) Significant Accounting Policies (a) Description of the Fund William Blair Funds (the "Fund") is a diversified mutual fund registered under the Investment Company Act of 1940, as amended, as an open-end management investment company. The number of shares authorized for this Fund is unlimited. The Fund currently consists of the following twelve portfolios (the "Portfolios"), each with its own investment objectives and policies. Equity Portfolios International Portfolios - ----------------- ------------------------ Growth International Growth Tax-Managed Growth International Equity Large Cap Growth Institutional International Growth Small Cap Growth Institutional International Equity Small-Mid Cap Growth Fixed Income Portfolio ---------------------- Value Discovery Income Money Market Portfolio ---------------------- Ready Reserves The investment objectives of the Portfolios are as follows: Equity....... Long-term capital appreciation. International Long-term capital appreciation. Fixed Income. High level of current income with relative stability of principal. Money Market. Current income, a stable share price and daily liquidity. The Institutional International Growth Fund (the "Portfolio") is the only Portfolio covered in this report. The Institutional International Equity Fund has not commenced operations as of the date of this report. (b) Investment Valuation The market value of domestic equity securities and options is determined by valuing securities traded on national securities exchanges or markets or in the over-the-counter markets at the last sales price or, if applicable, the official closing price or, in the absence of a sale on the date of valuation, at the latest bid price. From January 1, 2003 until November 24, 2003, the value of foreign securities was determined based upon the last sale price on the foreign exchange or market on which it is primarily traded or, if there had been no sale on the date of valuation, at the latest bid price. The Board of Trustees approved amendments to the Fund's valuation procedures in October 2003 relating to the manner in which the Funds' foreign securities are valued. This change was implemented November 24, 2003. To reflect this change, if the foreign exchange or market on which a security is primarily traded closes before the close of regular trading on the New York Stock Exchange (4:00 p.m. Eastern time), the Funds use an independent pricing service on a daily basis to estimate the fair value price as of the close of regular trading on the New York Stock Exchange. Otherwise, the value of foreign equity securities is determined based on the last sale price on the foreign exchange or market on which it is primarily traded or, if there have been no sales during that day, at the latest bid price. Foreign currency forward contracts and foreign currencies are valued at the forward and current exchange rates, respectively, prevailing on the date of valuation. Investments in other funds are valued at the underlying fund's net asset value on the date of valuation. Other securities, and all other assets, including securities for which a market price is not available, or the value of which is affected by a significant valuation event, are valued at fair value as determined in good faith by, or under the direction of the Board of Trustees and in accordance with the Fund's valuation procedures. As of June 30, 2004, there were securities held in the Institutional International Growth Portfolio requiring fair valuation by the Board of Trustees pursuant to the Fund's valuation procedures. June 30, 2004 William Blair Funds 11 (c) Investment income and investment transactions Dividend income is recorded on the ex-dividend date, except for those dividends from certain foreign securities which are recorded as soon as the information is available. Premiums and discounts are accreted and amortized on a straight-line basis for short-term investments and on an effective interest method for long-term investments. Interest income is determined on the basis of the interest accrued, adjusted for amortization of premium or discount. Variable rate bonds and floating rate notes earn interest at coupon rates that fluctuate at specific time intervals. The Portfolio utilizes the straight-line method of amortization of premiums and discounts for short-term securities (maturities less than one year) and the effective interest method for long-term securities (maturities greater than one year). Securities transactions are recorded on the trade date. Realized gains and losses from securities transactions are reported on an identified cost basis. (d) Share Valuation and Dividends to Shareholders Shares are sold and redeemed on a continuous basis at net asset value. The net asset value per share is determined by dividing the Portfolio's net assets by the number of shares outstanding as of the close of regular trading on the New York Stock Exchange, which is generally 3:00 p.m. Central time (4:00 p.m. Eastern time), on each day the Exchange is open. Dividends from net investment income, if any, are declared at least annually. Capital gain distributions, if any, are declared at least annually in December. Dividends payable to shareholders are recorded on the ex-dividend date. The timing and characterization of certain income and capital gain distributions are determined annually in accordance with Federal income tax regulations that may differ from accounting principles generally accepted in the United States. As a result, net investment income or loss and net realized gain or loss for a reporting period may differ from the amount distributed during such period. In addition, the Portfolio may periodically record reclassifications among certain capital accounts to reflect differences between financial reporting and income tax basis distributions. The reclassifications were reported in order to reflect the tax treatment for certain permanent differences that exist between income tax regulations and accounting principles generally accepted in the United States. The reclassifications relate to section 988 currency gains and losses, and recharterization of unrealized appreciation on PFICs. (Passive Foreign Investment Corporations). These reclassifications have no impact on the net asset values of the Portfolio. Accordingly, at December 31, 2003, the following reclassifications were recorded (in thousands): Accumulated Undistributed Capital Undistributed Net Net Realized Paid In Excess Portfolio Investment Income/(Loss) Gain/ (Loss) of Par Value --------- ------------------------ ------------ ------------ Institutional International Growth............ $(1,263) $1,263 $-- Distributions from net realized gains for book purposes may include short-term capital gains, which are included as ordinary income for tax purposes. The tax character of distributions paid during 2003 and 2002 was as follows (in thousands): Distributions Paid In 2003 Distributions Paid In 2002 - -------------------------- -------------------------- Ordinary Long-Term Ordinary Long-Term Portfolio Income Capital Gains Income Capital Gains --------- ------ ------------- ------ ------------- Institutional International Growth............ $1,120 $-- $32 $-- As of December 31, 2003, the components of distributable earnings on a tax basis were as follows (in thousands): Net Undistributed Accumulated Undistributed Unrealized Ordinary Capital and Long-Term Appreciation / Portfolio Income Other Losses Gain (Depreciation) - --------- ------ ------------ ---- -------------- Institutional International Growth..................... $605 $2,901 $-- $94,002 (e) Foreign Currency Translation and Foreign Currency Forward Contracts The Institutional International Growth Portfolio may invest in securities denominated in foreign currencies. As such, assets and liabilities denominated in foreign currencies are translated into U.S. dollar amounts at the current exchange rate on the 12 Semi-Annual Report June 30, 2004 date of valuation. This Portfolio may enter into foreign currency forward contracts (1) as a means of managing the risks associated with changes in the exchange rates for the purchase or sale of a specific amount of a particular foreign currency, and (2) to hedge the value, in U.S. dollars, of portfolio securities. Gains and losses from foreign currency transactions associated with purchases and sales of investments and foreign currency forward contracts are included with the net realized and unrealized gain or loss on investments. (f) Income Taxes The Portfolio intends to comply with the special provisions of the Internal Revenue Code available to regulated investment companies and, therefore, no provision for Federal income taxes has been made in the accompanying financial statements since the Portfolio intends to distribute substantially all of its taxable income to its shareholders and be relieved of all Federal income taxes. The Institutional International Growth Portfolio has elected to mark-to-market its investments in Passive Foreign Investment Companies ("PFICs") for Federal income tax purposes. In accordance with this election, the Portfolio recognized net unrealized appreciation (depreciation) of $1,229 (in thousands) in 2003 and $209 in 2002, all of which has been treated as an adjustment to the cost of investments for tax purposes. The Portfolio also treats the deferred loss associated with current and prior year wash sales as an adjustment to the cost of investments for tax purposes. The cost of investments for Federal income tax purposes and related gross unrealized appreciation/(depreciation) and net unrealized appreciation/(depreciation) at June 30, 2004, were as follows (in thousands): Net Gross Gross Unrealized Cost of Unrealized Unrealized Appreciation / Portfolio Investments Appreciation Depreciation (Depreciation) --------- ----------- ------------ ------------ -------------- Institutional International Growth............ $659,660 $115,520 $14,458 $101,062 At December 31, 2003, the Portfolio had unused capital loss carryforwards available for Federal income tax purposes to be applied against future capital gains, if any. If not applied, the carryforwards will expire as follows (in thousands): Portfolio 2010 2011 Total --------- ---- ---- ----- Institutional International Growth $2,107 $-- $2,107 For the period November 1, 2003 through December 31, 2003, the Portfolio incurred net realized capital or foreign currency losses. The Portfolio intends to treat this loss as having occurred in fiscal year 2004 for Federal income tax purposes (in thousands): Capital Currency Portfolio Loss Loss --------- ---- ---- Institutional International Growth $-- $794 (g) Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the financial statements. Actual results may differ from those estimates. (2) Transactions with Affiliates (a) Management and Expense Limitation Agreements The Portfolio has a management agreement with William Blair & Company L.L.C. (the "Company") for investment advisory, administrative, and other accounting services. The Portfolio pays the Company an annual fee, payable monthly, based on a specified percentage of its average daily net assets. A summary of the annual rates expressed as a percentage of average daily net assets is as follows: Institutional International Growth First $500 million............... 1.00% Next $500 million................ 0.95% In excess of $1 billion.......... 0.90% June 30, 2004 William Blair Funds 13 The Portfolio has also entered into an Expense Limitation Agreement with the Company. Under terms of this Agreement, the Company has agreed to waive its advisory fees and absorb other operating expenses through April 30, 2005, if total expenses of the Portfolio exceeds 1.10% of average daily net assets. For a period of three years subsequent to the Commencement of Operations of the Fund, the Company is entitled to reimbursement from the Institutional International Growth Portfolio for previously waived fees and expenses to the extent the overall expense ratio remains below the percentages indicated. The total amount available for recapture at June 30, 2004 is $327 (in thousands). As a result, the total expense ratio for the Portfolio during the period the agreement is in effect, will not fall below the percentage indicated. For the period ended June 30, 2004, the investment advisory fees incurred by the Portfolio and related fee waivers were as follows (in thousands) : Expenses Recovered or Gross Fee Net (Absorbed) Portfolio Advisory Fee Waiver Advisory Fee by Advisor - --------- ------------ ------ ------------ ---------- Institutional International Growth $3,185 $103 $3,082 $-- (b) Trustees Fees The Portfolio incurred fees of $15 (in thousands) to non-interested trustees of the Fund for the period ended June 30, 2004. Interested trustees are not compensated. (c) Investments in Affiliated Portfolio Pursuant to an Exemptive Order granted by the Securities and Exchange Commission in January, 2001, each of the Portfolios of the Fund may invest in the William Blair Ready Reserves Portfolio ("Ready Reserves"), an open-end money market portfolio managed by the Advisor. Ready Reserves Portfolio is used as a cash management option to the other Portfolios in the Fund. The Advisor waives management fees and shareholder service fees earned from the other Portfolios investment in the Ready Reserves Fund. The fees waived with respect to the Portfolio for the period ended June 30, 2004 are listed below. Distributions received from Ready Reserves are reflected as dividend income in the Portfolio's statement of operations. Amounts relating to the Portfolio's investments in Ready Reserves were as follows for the period ended June 30, 2004 (in thousands): Percent Sales Fees Dividend of Net Portfolio Purchases Proceeds Waived Income Value Assets --------- --------- -------- ------ ------ ----- ------ Institutional International Growth............ $79,731 $97,620 $37 $31 $2,164 0.3% (3) Investment Transactions Investment transactions, excluding money market instruments, for the period ended June 30, 2004 were as follows (in thousands): Portfolio Purchases Sales --------- --------- ----- Institutional International Growth............ $544,016 $251,261 (4) Foreign Currency Forward Contracts To protect itself against a decline in the value of foreign currency against the U.S. dollar, the Institutional International Growth Portfolio enters into foreign currency forward contracts with its custodian and others. The Portfolio bears the market risk that arises from changes in foreign currency rates and bears the credit risk if the counterparty fails to perform under the contract. The net realized and unrealized gains and losses associated with foreign currency forward contracts are reflected in the accompanying financial statements. There were no open foreign currency forward contracts at June 30, 2004. 14 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- Institutional International Growth Fund Periods Ended ---------------------------------- 6/30/2004 12/31/2003 12/31/2002 (a) --------- ---------- -------------- Net asset value, beginning of period.............................. $13.60 $ 9.567 $10.000 Income from investment operations: Net investment income........................................... 0.04 0.073 -- Net realized and unrealized loss on investments................. 0.37 3.993 (0.430) ------ ------- ------- Total from investment operations.................................. 0.41 4.066 (0.430) Less distributions from: Net investment income........................................... -- 0.033 0.003 Net realized gain............................................... -- -- -- ------ ------- ------- Total distributions............................................... -- 0.033 0.003 ------ ------- ------- Net asset value, end of period.................................... $14.01 $13.600 $ 9.567 ====== ======= ======= Total return (%).................................................. 3.01 42.47 (4.27) Ratios to average daily net assets (%) (b): Expenses, net of waivers and reimbursements..................... 1.10 1.10 1.10 Expenses, before waivers and reimbursements..................... 1.13 1.16 1.29 Net investment income (loss), net of waivers and reimbursements. 0.58 0.37 (0.05) Net investment income (loss), before waivers and reimbursements. 0.55 0.31 (0.24) ------------------------------------------------------- Periods Ended --------- ----------------------------------- 6/30/2004 12/31/2003 12/31/2002 (a) --------- - - - - ---------- - -------------- Supplemental data: Net assets at end of period (in thousands). $764,967 $477,511 $149,848 Portfolio turnover rate (%) (b)............ 82 56 59 - ---------- (a)For the period from July 26, 2002 (Commencement of Operations) to December 31, 2002. (b)Rates are annualized for periods that are less than a year. Past performance does not guarantee future results and current performance may be lower or higher that the data quoted. Results shown are annual returns, which assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. For the most current month-end performance information, please call 1-800-742-7272, or visit our Web site at www.williamblairfunds. com. Note: Net investment income (loss) per share for 2004, 2003, and 2002 is based on the average shares outstanding during the period. June 30, 2004 William Blair Funds 15 Trustees and Officers. The trustees and officers of the William Blair Funds, their ages, their principal occupations during the last five years, their affiliations, if any, with William Blair & Company, L.L.C., and other significant affiliations are set forth below. The address of each trustee and officer is 222 West Adams Street, Chicago, Illinois 60606. Number of Portfolios Term of in Fund Position(s) Office and Principal Complex Held with Length of Occupation(s) Overseen Other Directorships Name and Age Fund Time Served During Past 5 Years by Trustee Held by Trustee/Officer - ------------ ----------- ----------- ------------------------- ---------- --------------------------------------- Interested Trustees Conrad Fischer, 70* Chairman Since 1987 Principal, William Blair 12 Trustee Emeritus, Chicago Child Care of the & Company, L.L.C.; Society, a non-profit organization, and Board of Partner, APM Limited Partner, APM Limited Partnership Trustees Partnership Michelle Seitz, 38* Trustee Since 2002 Principal, William Blair 12 N/A & Company, L.L.C. Non-Interested Trustees J. Grant Beadle, 71 Trustee Since 1997 Retired Chairman and 12 Batts Group and Oliver Products Chief Executive Officer, Company, manufacturer of products Union Special for the medical device, food and Corporation, industrial graphics markets, Retired Associate sewing machine Director, Northwestern University manufacturer Institute for The Learning Sciences. Theodore A. Bosler, 69 Trustee Since 1997 Retired Principal and 12 Crystal Lake Watershed Fund, Desert Vice President, Lincoln Foothills Land Trust and Institute of Capital Management Chartered Financial Analysts. Ann P. McDermott, 64 Trustee Since 1996 Board member and 12 Junior League of Chicago, officer for various civic Northwestern University, Women's and charitable Board; Ravinia Festival Women's organizations over the Board; Rush Presbyterian St. Luke's past thirty years; Medical Center, Women's Board; professional experience University of Chicago, Women's prior thereto, registered Board; Visiting Nurses Association, representative for New Honorary Director York Stock Exchange firm John B. Schwemm, 69 Trustee Since 1990 Retired Chairman and 12 USG Corp., building material Chief Executive Officer, manufacturer, and Walgreen Co. R.R. Donnelley & Sons Company Donald L. Seeley, 60 Trustee Since 2003 Director, Applied 12 Beverly Enterprises, Inc., provider of Investment Management eldercare and rehabilitative services; Program, University of Modem Media, Inc., interactive Arizona Department of services company Finance, Formerly Vice Chairman and Chief Financial Officer, True North Communications, Inc., marketing communications and advertising firm Robert E. Wood II, 65 Trustee Since 1999 Retired Executive 12 Chairman, Add-Vision, Inc., Vice President, Morgan manufacturer of surface animation Stanley Dean Witter systems, and Micro-Combustion, LLC 16 Semi-Annual Report June 30, 2004 Number of Portfolios Term of in Fund Position(s) Office and Principal Complex Held with Length of Occupation(s) Overseen Other Directorships Name and Age Fund Time Served During Past 5 Years by Trustee Held by Trustee/Officer - ------------ ----------- ----------- ------------------------ ---------- ------------------------------- Officers Marco Hanig, 46 President Since 1999 Principal, William Blair N/A N/A & Company, L.L.C.; former Senior Vice President, First Chicago NBD Michael P. Balkin, 44 Senior Since 2000 Principal, William Blair N/A Exceed Corp. Vice & Company, L.L.C. President Rocky Barber, 52 Senior Since 2001 Principal, William Blair N/A YMCA of Metropolitan Chicago Vice & Company, L.L.C. President Chief 1999-2001 Executive Officer Karl W. Brewer, 37 Senior Since 2000 Principal, William Blair N/A N/A Vice & Company, L.L.C. President Harvey H. Bundy, III, 59 Senior Since 2003 Principal, William Blair N/A N/A Vice & Company, L.L.C. President Mark A. Fuller, III, 47 Senior Since 1993 Principal, William Blair N/A Partner, Fulsen Howney Partners Vice & Company, L.L.C. President W. George Greig, 51 Senior Since 1996 Principal, William Blair N/A N/A Vice & Company, L.L.C.; President Michael A. Jancosek, 44 Senior Since 2004 Principal, William Blair N/A N/A Vice & Company L.L.C. President Since 2000 Associate, William Blair Vice & Company, L.L.C.; President former Vice President, First Chicago NBD John F. Jostrand, 50 Senior Since 1999 Principal, William Blair N/A N/A Vice & Company, L.L.C. President James S. Kaplan, 43 Senior Since 2004 Principal, William Blair N/A N/A Vice & Company, L.L.C. President Vice Since 1995 Associate, William Blair N/A N/A President & Company, L.L.C. Robert C. Lanphier, IV, 47 Senior Since 2003 Principal, William Blair N/A Chairman, AG. Med, Inc. Vice & Company, L.L.C. President June 30, 2004 William Blair Funds 17 Number of Portfolios Term of in Fund Position(s) Office and Principal Complex Held with Length of Occupation(s) Overseen Other Directorships Name and Age Fund Time Served During Past 5 Years by Trustee Held by Trustee/Officer - ------------ ----------- ----------- ------------------------ ---------- ----------------------- David S. Mitchell, 44 Senior Since 2004 Principal, William Blair N/A N/A Vice & Company, L.L.C. President Since 2003 Associate, William Blair Vice & Company, L.L.C. President Capucine E. Price, 39 Senior Since 2004 Principal, William Blair N/A N/A Vice & Company L.L.C. President Since 2003 Associate, William Blair Vice & Company, L.L.C. President Gregory J. Pusinelli, 45 Senior Since 1999 Principal, William Blair N/A N/A Vice & Company, L.L.C.; President Norbert W. Truderung, 51 Senior Since 1992 Principal, William Blair N/A N/A Vice & Company, L.L.C. President Jeffrey A. Urbina, 49 Senior Since 1998 Principal, William Blair N/A N/A Vice & Company, L.L.C.; President former Director of Emerging Market Research and Portfolio Manager, Van Kampen American Capital Christopher T. Vincent, 49 Senior Since 2004 Principal, William Blair N/A Uhlich Children's Home Vice & Company, L.L.C. President Since 2002 Associate, William Blair Vice & Company, L.L.C.; President former Managing Director/Senior Portfolio Manager, Zurich Scudder Investments Terence M. Sullivan, 60 Vice Since 1997 Associate, William Blair N/A N/A President & Company, L.L.C. and Treasurer Colette M. Garavalia, 43 Secretary Since 2000 Associate, William Blair N/A N/A & Company, L.L.C.; former Assistant Vice President, Scudder Kemper Investments - ---------- * Mr. Fischer and Ms. Seitz are interested persons of the William Blair Funds because each is a principal of William Blair & Company, L.L.C., the Funds' investment advisor and principal underwriter. The Statement of Additional Information for the William Blair Funds includes additional information about the trustees and is available without charge by calling 1-800-635-2886 (in Massachusetts 1-800-635-2840) or by writing the Fund. 18 Semi-Annual Report June 30, 2004 Proxy Voting A description of the policies and procedures that the Fund uses to determine how to vote proxies relating to portfolio securities and information regarding how the Fund voted proxies relating to portfolio securities for the most recent 12-month period ended June 30 are available without charge, upon request, by calling 1-800-635-2886 (in Massachusetts 1-800-635-2840), at www.williamblairfunds.com and on the SEC's website at http://www.sec.gov. Quarterly Portfolio Schedules The Fund will file its complete schedule of portfolio holdings with the SEC for the first and third fiscal quarters of each fiscal year (quarters ended March 31 and September 30) on Form N-Q. The Fund's Forms N-Q will be available on the SEC's website at http://www.sec.gov and may be reviewed and copied at the SEC's Public Reference Room in Washington, D.C. Information on the operation of the SEC's Public Reference Room may be obtained by calling 1-800-SEC-0330. June 30, 2004 William Blair Funds 19 - -------------------------------------------------------------------------------- BOARD OF TRUSTEES - -------------------------------------------------------------------------------- Conrad Fischer, Chairman Principal, William Blair & Company, L.L.C. J. Grant Beadle Retired Chairman and CEO, Union Special Corporation Theodore A. Bosler Retired Principal and Vice President, Lincoln Capital Management Company Ann P. McDermott Director and Trustee Profit and not-for-profit organizations Donald L. Seeley Adjunct Lecturer and Director, University of Arizona Department of Finance John B. Schwemm Retired Chairman and CEO, R.R. Donnelley & Sons Company Michelle Seitz Principal, William Blair & Company, L.L.C. Robert E. Wood II Retired Executive Vice President, Morgan Stanley Dean Witter - -------------------------------------------------------------------------------- Officers - -------------------------------------------------------------------------------- Marco Hanig, President Michael P. Balkin, Senior Vice President Rocky Barber, Senior Vice President Karl W. Brewer, Senior Vice President Harvey H. Bundy III, Senior Vice President Mark A. Fuller, III, Senior Vice President W. George Greig, Senior Vice President Michael A. Jancosek, Senior Vice President John F. Jostrand, Senior Vice President James S. Kaplan, Senior Vice President Robert C. Lanphier, IV, Senior Vice President David S. Mitchell, Senior Vice President Capucine E. Price, Senior Vice President Gregory J. Pusinelli, Senior Vice President Norbert W. Truderung, Senior Vice President Jeffrey A. Urbina, Senior Vice President Christopher T. Vincent, Senior Vice President Terence M. Sullivan, Vice President and Treasurer Colette M. Garavalia, Secretary Investment Advisor William Blair & Company, L.L.C. Legal Counsel Vedder, Price, Kaufman & Kammholz, P.C. Transfer Agent State Street Bank and Trust Company P.O. Box 8506 Boston, MA 02266-8506 For customer assistance, call 1-800-635-2886 (Massachusetts 1-800-635-2840) 20 Date of First Use August, 2004 [Logo Appears Here] WILLIAM BLAIR FUNDS Institutional International Growth Fund 222 West Adams Street . Chicago, Illinois 60606 . 800.742.7272 . www.williamblairfunds.com William Blair & Company, L.L.C., Distributors [LOGO APPEARS HERE] WILLIAM BLAIR FUNDS SEMI-ANNUAL REPORT CLASS A, CLASS B, CLASS C - -------------------------------------------------------------------------------- JUNE 30, 2004 - -------------------------------------------------------------------------------- Table of Contents - -------------------------------------------------------------------------------- A Letter from the President............. 2 Growth Fund An Overview from the Portfolio Manager.. 4 Portfolio of Investments................ 7 Tax-Managed Growth Fund An Overview from the Portfolio Managers. 8 Portfolio of Investments................ 12 Large Cap Growth Fund An Overview from the Portfolio Managers. 13 Portfolio of Investments................ 16 Small Cap Growth Fund An Overview from the Portfolio Managers. 17 Portfolio of Investments................ 20 Small-Mid Cap Growth Fund An Overview from the Portfolio Managers. 21 Portfolio of Investments................ 24 International Growth Fund An Overview from the Portfolio Manager.. 25 Portfolio of Investments................ 28 International Equity Fund An Overview from the Portfolio Manager.. 31 Portfolio of Investments................ 32 Value Discovery Fund An Overview from the Portfolio Managers. 34 Portfolio of Investments................ 37 Income Fund An Overview from the Portfolio Managers. 39 Portfolio of Investments................ 42 Financial Statements...................... 45 Notes to Financial Statements............. 51 Officers.................................. 76 Board of Trustees......................... 80 This report is submitted for the general information of the shareholders of the William Blair Funds. It is not authorized for distribution to prospective investors unless accompanied or preceded by a prospectus of the William Blair Funds. Please read the prospectus carefully before you invest or send money. June 30, 2004 William Blair Funds 1 [PHOTO] Marco Hanig Marco Hanig - -------------------------------------------------------------------------------- A LETTER FROM THE PRESIDENT - -------------------------------------------------------------------------------- Dear Shareholders: In the first half of this year, the stock market advanced modestly. The Standard & Poor's 500 Index of large cap stocks was up 3.44%, the Russell 2000 Index of small cap stocks increased 6.76%, and the MSCI World ex-US Index of foreign stocks gained 4.10%. Last year's tax cut and low interest rates were supposed to provide a powerful stimulus to the economy--which indeed responded with strong growth in GDP and corporate earnings. As a result, the market bounced back from its March low point and ended last year 25-45% higher. This year two opposing forces are at work. On the one hand, the economy is fundamentally healthy with continued GDP and corporate earnings growth, albeit at a more normal pace. On the other hand, the Fed raised interest rates to slow down growth, as it wants to prevent the economy from overheating and make sure that inflation remains in check--particularly in light of the recent rise in energy prices. So far, it appears that the Fed is "tapping on the breaks" in just the right measure, succeeding in slowing down the growth without choking it off. The result is a stock market that has been rising at a moderate, sustainable pace. The market dislikes uncertainty, and there are several areas of concern, such as the outcome of the upcoming election, the impact of rising interest rates, the possibility of another major terrorist act, and anxiety over the future direction of our Middle East policy. Hence, most observers expect the market to continue to move mostly sideways in the next few quarters. Should some of this uncertainty be resolved, the underlying strength of the economy would suggest that we might expect single-digit, or even low teen returns over the coming years. Looking across different asset classes, in the first half of the year small cap stocks did slightly better than large caps, and value stocks a bit better than growth stocks, but these differences were not very pronounced. This reinforces the picture of a market essentially in equilibrium, without strong currents favoring any one sector or capitalization range. Our belief is that this should favor our bottom-up fundamental research approach that focuses on individual stock selection. Total Returns by Fund Category* January 1 through June 30, 2004 Value Blend Growth ----- ----- ------ Large Cap......................................... 3.46% 2.78% 2.42% Mid Cap........................................... 6.21% 5.50% 4.57% Small Cap......................................... 7.86% 7.11% 4.09% So far this year, the relative returns for most of the William Blair Funds were somewhat disappointing, with all but two funds underperforming their respective benchmarks--albeit by fairly modest amounts. The two notable exceptions were the Small Cap Growth Fund (Class N Shares), which posted an 11.54% return vs. 5.68% for the Russell 2000(R) Growth benchmark, and the recently launched Small-Mid Cap Growth Fund (Class N Shares), which had a 7.04% return vs. 5.65% for the Russell 2500(TM) Growth index. The reasons for the over- or under-performance vary from fund to fund, and are discussed in detail in the portfolio manager letters included in this report. While we want to be candid when our results do not shine, we frankly do not attach much significance to relative performance (either good or bad) over such a short time period. As always, we thank you for investing with us! /s/ Marco Hanig Marco Hanig - ---------- * Morningstar category returns represent the (non-weighted) average annual composite performance of all mutual funds listed in a particular category (such as Large Cap Growth) by Morningstar. 2 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- PERFORMANCE AS OF JUNE 30, 2004--CLASS A SHARES - -------------------------------------------------------------------------------- Year to Since Inception Date 1 Yr 3 Yr Inception Date ------- ----- ----- --------- --------- Growth Fund -5.85 6.55 -5.88 -3.34 10/19/99 Russell 3000(R) Growth 2.96 18.82 -3.48 -5.45 Standard & Poor's 500 3.44 19.11 -0.69 -0.65 Tax-Managed Growth Fund Return before Taxes -4.74 7.84 -4.48 -4.82 12/27/99 After Taxes on Distributions -4.74 7.84 -4.48 -4.82 After Tax on Distributions and Redemptions -5.09 3.08 -4.09 -4.26 Russell 3000(R) Growth 2.96 18.82 -3.48 -10.38 Large Cap Growth Fund -6.55 5.79 -7.94 -12.29 12/27/99 Russell 1000(R) Growth 2.74 17.88 -3.74 -10.83 Small Cap Growth Fund 5.05 35.90 14.00 21.57 12/27/99 Russell 2000(R) Growth 5.68 31.55 -0.22 -4.53 The Small Cap Growth Fund's performance during 2000 was primarily attributable to investments in initial public offerings (IPOs) during a rising market. Since then, IPOs have had an insignificant effect on the Fund's performance. Small-Mid Cap Growth Fund 0.79 -- -- -5.60 12/29/03 Russell 2500(TM) Growth 5.65 -- -- 5.00 International Growth Fund -2.92 24.22 3.32 5.62 10/21/99 MSCI All Country World Free Ex-US 4.10 32.50 5.25 0.24 International Equity Fund -0.57 -- -- -0.57 5/24/04 MSCI All Country World Free Ex-US 5.18 5.18 Value Discovery Fund -0.82 24.09 7.54 14.53 11/2/99 Russell 2000(R) 6.76 33.37 6.24 8.34 Russell 2000(R) Value 7.83 35.17 12.15 16.11 Income Fund -2.49 -1.89 4.10 5.69 10/25/99 Lehman Intermediate Govt./Credit Bond Index -0.11 -0.06 6.21 7.14 Past performance does not guarantee future results. Returns shown are average annual total returns, which assume reinvestment of dividends and capital gains. Returns shown reflect the effects of maximum sales loads. Investment returns and principal will fluctuate and you may have a gain or a loss when you sell shares. Investing in smaller companies involves special risks, including higher volatility and lower liquidity. International and emerging markets investing involves special risk considerations, including currency fluctuations, lower liquidity, economic and political risk. From time to time, the investment advisor may waive fees or reimburse expenses for certain Funds. Without these waivers, performance would be lower. Class A shares are not available for sale. Tax-Managed Growth Fund's after-tax returns are calculated using the highest historical individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor's tax situation and may differ from those shown. After-tax returns shown are not relevant to investors who hold their fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts. After-tax returns are shown only for Class A and the after-tax returns for other classes will vary. For more complete information about the Funds, including risk considerations, charges, and expenses, call 1-800-742-7272 to obtain a prospectus. Read it carefully before you invest or send money. (C)William Blair & Company, L.L.C., distributor. 6/04 See accompanying Notes to Financial Statements. June 30, 2004 William Blair Funds 3 [PHOTO] JOSTRAND John F. Jostrand - -------------------------------------------------------------------------------- GROWTH FUND - -------------------------------------------------------------------------------- The Growth Fund invests primarily in a diversified portfolio of common stocks of domestic growth companies with sustainable, above-average growth from one business cycle to the next. - -------------------------------------------------------------------------------- AN OVERVIEW FROM THE PORTFOLIO MANAGER - -------------------------------------------------------------------------------- How did the Fund perform over the last year? The Growth Fund posted a -5.85% loss on a total return basis (Class A Shares reflecting the impact of the maximum sales load) for the 6 months ended June 30, 2004. By comparison, the Fund's benchmarks, the Russell 3000(R) Growth Index increased 2.96%, while the Standard & Poor's 500 Index increased 3.44%. What were the most significant factors impacting Fund performance? What factors were behind the Fund's underperformance versus the benchmark? The first six months of the year the market continued some of the trend seen in late 2003, when companies with lower earnings quality outperformed. With regards to the Fund's first half of the year, one major element of the Growth Fund's underperformance to the Russell 3000(R) Growth Index came in the technology sector. As is frequently true, the technology sector proved a challenging place to invest, with various sub-categories turning in widely disparate returns. Internet services stocks continued to enjoy strong appreciation, while computer hardware companies were up modestly and semiconductors were in negative territory. As we mentioned before, low quality, low price stocks ruled the performance derby in 2003. Most of these stocks outperformed based on expectations that these companies would stand to benefit the most from an economic recovery. Consistent with our philosophy, these low quality growth stocks, however, do not meet our Fund's investment criteria. Late in the first quarter, with the tempo of the economy slowing, higher quality stocks did begin to show signs of strength. Companies with interest rate sensitivity, particularly financial and consumer discretionary stocks were also laggards as concerns loomed with the Federal Reserve set to raise interest rates. Although the Fund underperformed early in the first quarter as the winners of 2003 had one last run, the Fund outperformed when the market weakened. By the end of the first quarter, the Fund worked back to almost even with its benchmark. What were among the best performing sectors for the Fund? Were there any investment themes that produced the best results? The Health Care sector was the largest contributor to our performance. Within the sector, Alcon and Zimmer Holdings continue to be strong outperformers with first half returns of 30% and 25% respectively. Alcon, the global medical company that specializes in eye care related products, continues to execute their business strategy. Their most recent quarter saw earning's gains of 35% spread throughout each of their divisions. We are confident that Alcon will continue to gain market share and increase sales per account with new products continuing to come to market. Zimmer's orthopedic sales remain robust. We expect strong double-digit earnings growth through 2006. Pricing remains favorable, and the demographic backdrop (aging baby-boomers) should extend revenue growth. 4 Semi-Annual Report June 30, 2004 What were among the weakest performing sectors for the Fund? Were there any investments that did not measure up to your expectations? The consumer discretionary sector weighed on the Fund's first six months' performance. CarMax, a leading retailer of used cars and trucks had a difficult first half of the year. Consumers have been substituting new cars in place of used because of automobile manufacturers increasing usage of incentives. Although the industry has been under stress, CarMax continues to take market share. Switching from autos to airplanes, another holding that underperformed in the first half was Ryanair based out of Ireland. From a profitability standpoint they remain the leader, but a combination of unfavorable government regulations and stepped up competition has impacted their margins. What is your current strategy? How is the Fund positioned? The next boost to the economy is more likely to come from corporate spending, as many companies now maintain record levels of cash. We expect as consumer spending slows, the corporate sector will take the baton and increase capital expenditures. As business executives' optimism increases, they will begin to increase their profit reinvestment or raise their dividends to shareholders. To facilitate the reinvestment, businesses will have to increase hiring, which should modestly revitalize consumer spending. Our recent increase in Danaher this quarter illustrates our positioning given our outlook of higher interest rates and increased capital spending. Danaher's diversified industrial customer base has much stronger balance sheets than year's past. To maintain its growth, Danaher's customers will need to reinvest in its businesses. Earnings strength remained positive into the end of the first half. However, we are now entering the point of the earnings cycle where relatively easy comparisons are over and companies' earnings acceleration slows. In our opinion, earnings will remain solid; however, they will likely slow to approximate historical trend line growth. As this transition occurs, quality growth tends to outperform the leveraged, lower-quality companies as higher interest rates make financing more challenging. June 30, 2004 William Blair Funds 5 - -------------------------------------------------------------------------------- Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Performance Highlights - -------------------------------------------------------------------------------- Annual Total Return without the maximum sales load ----------------------------------------------------------------------- 6/30/2004(a) 2003 2002 2001 2000 1999 ------------ ------ --------- ------ ------ ----- Growth Fund Class A......... (0.10)% 23.85% (25.94)% (13.46)% (7.47)% 23.29%(a)(b) Russell 3000(R) Growth Index 2.96 30.97 (28.03) (19.63) (22.42) 33.82 S&P 500 Index............... 3.44 28.68 (22.10) (11.88) (9.11) 21.04 -------------------------------------------------------------------------- Average Annual Total Return at 6/30/2004 reflecting the maximum sales load ----------------------------------------------------------------------- Since 1 Year 3 Year Inception ------------ ------ --------- Growth Fund Class A......... 6.55% (5.88)% (3.34)%(c) Growth Fund Class B......... 7.07 (5.85) (5.29)(d) Growth Fund Class C......... 11.09 (4.77) (4.79)(d) -------------------------------------- (a)Total return is not annualized for periods that are less than a full year. (b)For the period from October 19, 1999 (Commencement of Operations) to December 31, 1999. (c)For the period from October 19, 1999 to June 30, 2004. (d)For the period from November 2, 1999 to June 30, 2004. Illustration of an assumed investment of $10,000 with reinvestment of capital gain distributions and income dividends [CHART] Growth Fund - Russell 3000/R/ S&P 500 Class A Growth Index Index 10/99 $9,400 $10,000 $10,000 12/99 11,600 12,700 11,700 6/00 12,300 13,200 11,600 12/00 10,800 9,900 10,600 6/01 9,600 8,500 9,900 12/01 9,300 7,900 9,400 6/02 7,900 6,300 8,100 12/02 6,900 5,700 7,300 6/03 7,500 6,500 8,100 12/03 8,500 7,500 9,400 6/04 8,500 7,700 9,700 Past performance does not guarantee future results. Total returns shown assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. Class A, B, and C shares are not available for sale. The performance highlights and graph presented above do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The Russell 3000(R) Growth Index consists of large, medium, and small-capitalization companies with above average price-to-book ratios and forecasted growth rates. The index is weighted by market capitalization and large/medium/small companies make up approximately 80%/15%/5% of the index. The S&P 500 Index indicates broad larger capitalization equity market performance. This report identifies the Fund's investments on June 30, 2004. These holdings are subject to change. Not all stocks in the Fund performed the same, nor is there any guarantee that these stocks will perform as well in the future. Market forecasts provided in this report may not necessarily come to pass. 6 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Growth Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) - --------------------------------------------------- -------- Shares Value - --------- ----------------------------------------- -------- Common Stocks Information Technology--32.3% 288,200 *BEA Systems, Inc........................ $ 2,369 89,900 CDW Corporation.......................... 5,732 94,700 *Cognos, Inc.+........................... 3,424 224,900 *Dell, Inc............................... 8,056 49,000 *Digital Insight, Inc.................... 1,016 398,100 *EMC Corporation......................... 4,538 243,200 First Data Corporation................... 10,827 136,400 *Intuit, Inc............................. 5,262 138,525 *Iron Mountain, Inc...................... 6,685 179,525 *Jabil Circuit, Inc...................... 4,520 124,700 Linear Technology Corporation............ 4,922 157,800 Paychex, Inc............................. 5,346 201,900 SAP AG-ADR............................... 8,442 172,700 *Skillsoft Plc-ADR....................... 1,313 37,500 StarTek, Inc............................. 1,343 308,600 *SunGard Data Systems, Inc............... 8,024 838,651 Taiwan Semiconductor Mfg. Co. Ltd.--ADR.. 6,969 -------- 88,788 -------- Health Care--26.2% 100,200 Alcon, Inc.+............................. 7,881 110,000 *Amgen, Inc.............................. 6,003 182,700 *Axcan Pharma, Inc.+..................... 3,855 102,175 Eli Lilly & Company...................... 7,143 78,400 *Express Scripts, Inc., Class "A"........ 6,212 73,900 *Integra LifeSciences Holding Corporation 2,606 171,800 Medtronic, Inc........................... 8,370 242,275 Pfizer, Inc.............................. 8,305 81,200 *ResMed, Inc............................. 4,138 117,900 UnitedHealth Group, Inc.................. 7,339 113,500 *Zimmer Holdings, Inc.................... 10,011 -------- 71,863 -------- Industrials and Services--12.0% 101,500 C.H. Robinson Worldwide, Inc............. 4,653 213,196 Danaher Corporation...................... 11,054 140,000 *Education Management Corporation........ 4,600 171,000 *Knight Transportation, Inc.............. 4,913 159,500 *Labor Ready, Inc........................ 2,472 103,300 *Ryanair Holdings plc--ADR............... 3,386 15,900 Strayer Education, Inc................... 1,774 -------- 32,852 -------- - ---------- *Non-income producing securities ADR = American Depository Receipt + = U.S. listed foreign security - ---------------------------------------------- -------- Shares Value - --------- ------------------------------------ -------- Common Stocks--(continued) Consumer Discretionary--11.8% 185,350 *Bed, Bath & Beyond, Inc............ $ 7,127 141,700 *CarMax, Inc........................ 3,099 98,075 *Cox Communications, Inc., Class "A" 2,725 108,900 *Entercom Communications Corporation 4,062 161,550 Family Dollar Stores, Inc........... 4,914 106,550 Harley-Davidson, Inc................ 6,600 89,900 *Kohl's Corporation................. 3,801 -------- 32,328 -------- Financials--8.0% 165,205 SEI Investments Company............. 4,798 174,050 SLM Corporation..................... 7,040 138,650 State Street Corporation............ 6,799 43,500 XL Capital Ltd., Class "A"+......... 3,283 -------- 21,920 -------- Consumer Staples--3.4% 175,200 PepsiCo, Inc........................ 9,440 -------- Energy--2.7% 66,700 Apache Corporation.................. 2,905 178,300 Suncor Energy, Inc.+................ 4,566 -------- 7,471 -------- Materials--2.3% 200,600 Ecolab, Inc......................... 6,359 -------- Total Common Stock--98.7% (cost $217,557).............................. 271,021 -------- Investment in Affiliate 3,273,228 William Blair Ready Reserves Fund... 3,273 -------- Total Investment in Affiliate--1.2% (cost $3,273)................................ 3,273 -------- Total Investments--99.9% (cost $220,830).............................. 274,294 Cash and other assets, less liabilities--0.1%. 319 -------- Net assets--100.0%............................ $274,613 ======== See accompanying Notes to Financial Statements. June 30, 2004 William Blair Funds 7 [PHOTO] FULLER Mark A. Fuller III [PHOTO] PUSINELLI Gregory J. Pusinelli - -------------------------------------------------------------------------------- TAX-MANAGED GROWTH FUND - -------------------------------------------------------------------------------- The Tax-Managed Growth Fund invests primarily in a diversified portfolio of common stocks of domestic growth companies with sustainable, above-average growth from one business cycle to the next. - -------------------------------------------------------------------------------- AN OVERVIEW FROM THE PORTFOLIO MANAGERS - -------------------------------------------------------------------------------- How did the Fund perform over the last year? For the six-month period ended June 30, 2004, the Tax-Managed Growth Fund lost - -4.74% on a total return basis (Class A Shares reflecting the impact of the maximum sales load). By comparison, the Fund's benchmark, the Russell 3000(R) Growth Index, increased 2.96%, while the Standard & Poor's 500 Index increased 3.44%. What were the most significant factors impacting Fund performance? What factors were behind the Fund's underperformance versus the benchmark? Weakness in two sectors--Consumer Discretionary and Information Technology were largely responsible for the Fund's underperformance versus its benchmark at mid-year. The speculative, lower quality stock rally that dominated the equity markets in 2003 spilled over into early 2004. As we have stated, most of last year's top-performing stocks were lower-quality and more speculative companies with no demonstrated history of earnings growth. Investors believed these companies would be the greatest beneficiaries of an economic and stock market recovery. The majority of these types of companies, however, do not fit our high quality growth criteria. In the latter half of the first quarter, higher quality issues such as those the Fund invests in began to close the performance gap with their lower quality counterparts. We believe investors began to move towards more predictable businesses with solid, demonstrated track records of earnings growth. These companies will be the best equipped to effectively manage their businesses in a more temperate economic climate. The equity markets moved sideways during the second quarter, as the major stock market indexes moved in a trading range for weeks ahead of the Federal Reserve's policy-making Open Market Committee meeting on June 30. The mood was a subdued one as investors mulled over the prospects for rising interest rates, inflation and the tenuous situation in Iraq. What were among the best performing sectors for the Fund? Were there any investment themes that produced the best results? The Industrials and Healthcare sectors were where the Fund had its best performers, with Industrial stocks, in particular, benefiting from signs of strength in the economy. Three of the second quarter's top six performing issues were Industrials, including Expeditors International, a transportation and logistics company focused on imports from the Far East; Knight Transportation, a trucking company; and Choicepoint, a company which conducts background security checks for firms hiring new employees. As employment numbers have grown, Choicepoint has seen greater demand for its services. Within the Healthcare sector, Alcon, Stryker and Zimmer Holdings also were strong performers. Alcon is a global leader in developing, manufacturing, and selling ophthalmology 8 Semi-Annual Report June 30, 2004 drugs, supplies, and surgical devices, and also sells consumer eye-care products such as contact lens-cleaning solution. Stryker and Zimmer Holdings are both firms involved in the design and manufacture of orthopedic products and devices. The Fund's best performing investment--for both the second quarter as well as the year-to-date period--was Whole Foods, in the Consumer Staples sector. The company has benefited from the heightened focus by consumers on eating healthier foods, and to a lesser extent as consumers and investors avoided supermarket retailers involved in recent labor disputes. Whole Foods also dominates a market segment in which there is no strong "number two" competitor. What were among the weakest performing sectors for the Fund? Were there any investments that did not measure up to your expectations? As previously mentioned, the Consumer Discretionary and Information Technology sectors accounted for most of the weakness in the Fund's portfolio. The worst-performing issue for the quarter as well as the year-to-date period was Vistacare, in the Health Care sector. Vistacare is a hospice-care provider which has grown rapidly since the company first went public in 2003. The company has seen a slowdown in admissions growth, partly due to a reorganization of its sales force and sales process. As a result, the company has lowered its earnings "guidance" (forecasts) going forward. We believe this company is facing a challenging and more competitive market environment in the near-term, as the business attracts new entrants and is subjected to downward pricing pressure. We will be closely monitoring the company to see if Vistacare has hit a "pothole" in the road, or if its business is undergoing a fundamental change. CarMax was the second worst-performing stock. CarMax was hurt by continued dealer incentives for new cars, as well as rising used car prices. The price increase in used cars is attributed to the low cost of financing new cars, which results in a decrease in leased cars. Fewer leased cars means that fewer used cars are returned to dealer fleets when the leases expire. Finally, a number of current car owners have negative "equity" in their cars as the value of their car loans exceeds the trade-in value of their vehicles. We nonetheless remain convinced that the rationale for originally investing in CarMax is intact: the company has an excellent management team, it has a superior business proposition for consumers, no dominant competitors, and the company is still in the very early stage of significant long-term growth. Other poor performers included Weight Watchers, which reflected migrating consumer preferences to try out other dieting alternatives, such as the current "low-carb" diet fad, and Family Dollar Stores, whose customers have been hurt by the recent rise in energy prices. Family Dollar customers' disposable income is disproportionately impacted by higher gasoline prices, so an increase at the pump means that its customers will have less to spend in their stores. Lastly, Technology was a volatile sector during the first quarter, and many of the chip manufacturers came under pressure, with some profit-taking occurring amid impressions that demand might be moderating along with growth in the economy. What is your current strategy? How is the Fund positioned? Unlike the speculative market environment of 2003, the stock market has shifted this year towards profitable companies with good balance sheets and higher returns on invested capital. It is an environment in which we expect our high quality growth emphasis to have a greater impact on performance. June 30, 2004 William Blair Funds 9 With the economic recovery on solid footing, we are evaluating our industry focus and companies that will stand to benefit from the expansion in the economy. As we search for promising candidates for the Fund's portfolio of investments, we intend to maintain reasonable weightings in different sectors, and are not inclined to change our over- or under-weighting in any particular area. We remain committed to our Consumer Discretionary holding in spite of the weakness in that sector. One sector we will be closely monitoring is Media, where two of our holdings, Univision and Clear Channel, are not experiencing the increase in ad spending we would expect at this point in the economic recovery compared to historic trends, especially in advance of the upcoming presidential election. As always, we will continue to focus on and emphasize high-quality names that we believe will serve our investors well. 10 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Tax-Managed Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Performance Highlights - -------------------------------------------------------------------------------- Annual Total Returns without the maximum sales load ------------------------------------------------------------- 6/30/2004(a) 2003 2002 2001 2000 1999(a)(b) ------------ ----- ------ ------ ------ ---------- Tax-Managed Growth Fund Class A 1.07% 22.63% (24.39)% (10.12)% (0.98)% 1.80% Russell 3000(R) Growth Index... 2.96 30.97 (28.03) (19.63) (22.42) 0.79 S&P 500 Index.................. 3.44 28.68 (22.10) (11.88) (9.11) 0.85 -------------------------------------- Average Annual Total Return at 6/30/2004 reflecting the maximum sales load ---------------------------------------------------------------------- Since 1 Year 3 Year Inception(c) ----------- ------ ------------ Tax-Managed Growth Fund Class A 7.84% (4.47)% (4.82)% Tax-Managed Growth Fund Class B 8.57 (4.38) (4.82) Tax-Managed Growth Fund Class C 12.57 3.34 (4.30) -------------------------------------- (a)Total return is not annualized for periods that are less than a full year. (b)For the period from December 27, 1999 (Commencement of Operations) to December 31, 1999. (c)For the period from December 27, 1999 to June 30, 2004. Illustration of an assumed investment of $10,000 [CHART] 12/27/99 6/00 12/00 6/01 12/01 6/02 12/02 6/03 12/03 6/04 Tax-Managed Growth Fund Class A $9,400 9,800 9,500 8,700 8,500 7,200 6,500 7,000 7,900 8,000 Russell 3000(R) Growth Index $10,000 10,500 7,800 6,800 6,300 5,000 4,500 5,100 5,900 6,100 S&P 500 Index $10,000 10,000 9,200 8,600 8,100 7,000 6,300 7,000 8,100 8,400 Past performance does not guarantee future results. Total returns shown assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. From time to time, the investment adviser may waive fees or reimburse expenses for the Fund. Without these waivers, performance would be lower. Class A, B, and C shares are not available for sale. The performance highlights and graph presented above do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The Russell 3000(R) Growth Index consists of large, medium, and small-capitalization companies with above average price-to-book ratios and forecasted growth rates. The index is weighted by market capitalization and large/medium/small companies make up approximately 80%/15%/5% of the index. The S&P 500 Index indicates broad larger capitalization equity market performance. This report identifies the Fund's investments on June 30, 2004. These holdings are subject to change. Not all stocks in the Fund performed the same, nor is there any guarantee that these stocks will perform as well in the future. Market forecasts provided in this report may not necessarily come to pass. June 30, 2004 William Blair Funds 11 - -------------------------------------------------------------------------------- Tax-Managed Growth Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) - --------------------------------------------- ------ Shares Value - ------ -------------------------------------- ------ Common Stocks Health Care--21.3% 2,115 Alcon, Inc.+.......................... $ 166 805 Allegran, Inc......................... 72 1,855 *Amgen, Inc........................... 101 2,265 *Express Scripts, Inc., Class "A"..... 179 1,425 Guidant Corporation................... 80 3,675 Pfizer, Inc........................... 126 3,190 *ResMed, Inc.......................... 163 1,400 Stryker Corporation................... 77 2,260 *Vistacare, Inc., Class "A"........... 42 2,390 *Zimmer Holdings, Inc................. 211 ------ 1,217 ------ Information Technology--21.2% 5,775 *BISYS Group.......................... 81 1,380 *Caci International, Inc., Class "A".. 56 1,640 CDW Corporation....................... 105 3,240 First Data Corporation................ 144 2,955 *Fiserv, Inc.......................... 115 3,165 *Intuit, Inc.......................... 122 3,595 *Jabil Circuit, Inc................... 90 2,610 Microchip Technology, Inc............. 82 3,930 Microsoft Corporation................. 112 1,740 Paychex, Inc.......................... 59 4,495 *SunGard Data Systems, Inc............ 117 8,539 Taiwan Semiconductor Mfg. Co. Ltd--ADR 71 1,790 Xilinx, Inc........................... 60 ------ 1,214 ------ Consumer Discretionary--17.7% 2,100 *Bed, Bath & Beyond, Inc.............. 80 2,750 *CarMax, Inc.......................... 60 2,200 Clear Channel Communications.......... 81 4,200 *Comcast Corporation, Class "A"....... 116 3,355 Family Dollar Stores, Inc............. 102 3,280 *InterActiveCorp...................... 99 990 *Kohl's Corporation................... 42 2,925 Lowe's Companies, Inc................. 154 2,135 Regis Corporation..................... 95 1,840 *Univision Communications, Inc........ 59 3,695 *Williams-Sonoma, Inc................. 122 ------ 1,010 ------ Industrials and Services--16.8% 2,485 C.H. Robinson Worldwide, Inc.......... 114 1,400 *ChoicePoint, Inc..................... 64 - ---------- * Non-income producing securities ADR = American Depository Receipt + = US. listed foreign security - ----------------------------------------------- ------ Shares Value - ------ ---------------------------------------- ------ Common Stocks--(continued) 4,030 Danaher Corporation..................... $ 209 2,475 Expeditors International of Washington.. 122 3,170 Fastenal Company........................ 180 3,605 General Electric Company................ 117 2,370 *Knight Transportation, Inc............. 68 2,725 *Ryanair Holdings plc--ADR.............. 90 ------ 964 ------ Financials--9.7% 2,240 American International Group............ 160 2,270 Investors Financial Services Corporation 99 2,145 Moody's Corporation..................... 138 1,665 State Street Corporation................ 82 1,010 XL Capital Ltd., Class "A"+............. 76 ------ 555 ------ Consumer Staples--7.3% 1,110 Colgate-Palmolive Company............... 65 3,115 PepsiCo, Inc............................ 168 2,395 Walgreen Co............................. 87 1,040 Whole Foods Market, Inc................. 99 ------ 419 ------ Materials--5.0% 5,930 Airgas, Inc............................. 142 2,320 Ecolab, Inc............................. 74 1,810 Praxair, Inc............................ 72 ------ 288 ------ Energy--2.7% 6,060 Suncor Energy, Inc.+.................... 155 ------ Total Common Stock--101.7% (Cost $4,545)................................. 5,822 ------ Investment in Affiliate 1,598 William Blair Ready Reserves Fund....... 2 ------ Total Investment in Affiliate--0.1% (Cost $2)..................................... 2 ------ Total Investments--101.8% (Cost $4,547)................................. 5,824 Liabilities plus cash and other assets--(1.8)%. (104) ------ Net assets--100.0%............................. $5,720 ====== See accompanying Notes to Financial Statements. 12 Semi-Annual Report June 30, 2004 [PHOTO] BARBER Rocky Barber [PHOTO] JOSTRAND John F. Jostrand [PHOTO] Norbert W. Truderung Norbert W. Truderung - -------------------------------------------------------------------------------- LARGE CAP GROWTH FUND - -------------------------------------------------------------------------------- The Large Cap Growth Fund invests primarily in common stocks of large domestic growth companies of high quality that have demonstrated sustained growth over a long period of time. - -------------------------------------------------------------------------------- AN OVERVIEW FROM THE PORTFOLIO MANAGERS - -------------------------------------------------------------------------------- How did the Fund perform over the last year? The Large Cap Growth Fund posted a -6.55% loss on a total return basis (Class A Shares reflecting the impact of the maximum sales load) for the 6 months ended June 30, 2004. By comparison, the Fund's benchmark, the Russell 1000 Growth(R) Index, increased 2.74%. What were the most significant factors impacting Fund performance? What factors were behind the Fund's underperformance versus the benchmark? During the first few months of 2004 the market seemed to be digesting the gains achieved in 2003. With respect to the Fund's first half, one major element of the Large Cap Growth Fund's underperformance to the Russell 1000(R) Growth Index came in the technology sector. As is frequently true, the technology sector proved a challenging place to invest, with various sub-categories turning in widely disparate returns. Internet services stocks continued to enjoy strong appreciation, while computer hardware companies were up modestly and semiconductors were in negative territory. As we mentioned before, low quality, low price stocks ruled the performance derby in 2003. Most of these stocks outperformed based on expectations that these companies would stand to benefit the most from an economic recovery. Consistent with our philosophy, these low quality growth stocks, however, do not meet our Fund's investment criteria. Late in the first quarter, with the tempo of the economy slowing, higher quality stocks did begin to show signs of strength. Companies with interest rate sensitivity, particularly financial and consumer discretionary stocks were also laggards as concerns loomed with the Federal Reserve set to raise interest rates. Although the Fund underperformed early in the first quarter as the low-quality winners of 2003 had one last run, the Fund outperformed when the market weakened. By the end of the first quarter, the Fund worked back to almost even with its benchmark. What were among the best performing sectors for the Fund? Were there any investment themes that produced the best results? The Health Care sector was the largest contributor to our performance. Within the Health Care sector, Alcon and Zimmer Holdings continue to be strong outperformers with second quarter returns of 24% and 20% respectively. Alcon, the global medical company that specializes in eye care related products, continues to execute its business strategy. Alcon's most recent quarter saw earnings gains of 35% spread throughout each of its divisions. We are confident that Alcon will continue to gain market share and increase sales per account with new products continuing to come to market. Zimmer's orthopedic sales remain robust. We expect strong double-digit earnings growth through 2006. Pricing remains favorable, and the demographic backdrop (aging baby-boomers) should extend revenue growth. June 30, 2004 William Blair Funds 13 What were among the weakest performing sectors for the Fund? Were there any investments that did not measure up to your expectations? BEA Systems, a software company, proved a significant detractor from performance. Our initial rationale for the purchase was BEA's dominant software offering. Although we still believe its products have relative strengths, customers are currently indicating a stronger interest in purchasing lower-priced (and in our opinion, lower quality) bundled software offerings. The Fund's consumer discretionary holdings did not keep pace with the overall market. Cox Communication was the largest detractor during the first half of the year. With the majority of the costs associated with the deployment of the next generation of cable behind them, the cable companies' balance sheets are in much better shape. However the market is now concerned with satellite's growing subscriber companies becoming more of a competitor. What is your current strategy? How is the Fund positioned? The next boost to the economy is more likely to come from corporate spending, as many companies now have record levels of cash. We expect as consumer spending slows, the corporate sector will take the baton and increase capital expenditures. As business executives' optimism increases, we believe they will begin to increase their profit reinvestment or raise their dividends to shareholders. To facilitate the reinvestment, businesses will have to increase hiring, which should modestly revitalize consumer spending. Our recent increase in Danaher illustrates our positioning given our outlook for increased capital spending. Danaher's diversified industrial customer base has a much stronger balance sheet than in years past. To maintain their growth, Danaher's customers will need to reinvest in its businesses. Earnings strength remained positive into the end of the first half. However, we are now entering the point of the earnings cycle where relatively easy comparisons are over and companies' earnings acceleration slows. In our opinion, earnings will remain solid; however, they will likely slow to the approximate historical trend line growth. As this transition occurs, quality growth tends to outperform the leveraged, lower quality companies as higher interest rates make financing more challenging. 14 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Large Cap Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Performance Highlights - -------------------------------------------------------------------------------- Annual Total Return without the maximum sales load -------------------------------------------------------------- 6/30/2004(a) 2003 2002 2001 2000 1999(a)(b) ------------ ----- ------ ------ ------ ---------- Large Cap Growth Fund Class A............................ (0.84)% 23.85% (28.55)% (20.83)% (16.67)% 1.40% Russell 1000(R) Growth Index............................. 2.74 29.75 (27.88) (20.42) (22.42) 0.46 - ----------------------------- Average Annual Total Return at 6/30/2004 reflecting the maximum sales load -------------------------------------- Since 1 Year 3 Year Inception(c) ------ ------ ------------ Large Cap Growth Fund Class A.......................... 5.79% (7.94)% (12.29)% Large Cap Growth Fund Class B.......................... 6.42 (7.96) (12.55) Large Cap Growth Fund Class C.......................... 10.44 (6.85) (11.88) -------------------------------------- (a)Total return is not annualized for periods that are less than a full year. (b)For the period from December 27, 1999 (Commencement of Operations) to December 31, 1999. (c)For the period from December 27, 1999 to June 30, 2004. Illustration of an assumed investment of $10,000 [CHART] Large Cap Growth Fund Russell 1000/R/ Class A Growth Index 12/27/99 $9,400 $10,000 6/00 9,500 10,500 12/00 8,000 7,800 6/01 6,700 6,700 12/01 6,300 6,200 6/02 5,100 4,900 12/02 4,500 4,500 6/03 4,900 5,100 12/03 5,600 5,800 6/04 5,500 6,000 Past performance does not guarantee future results. Total returns shown assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. From time to time, the investment adviser may waive fees or reimburse expenses for the Fund. Without these waivers, performance would be lower. Class A, B and C shares are not available for sale. The performance highlights and graph presented above do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The Russell 1000(R) Growth Index consists of large-capitalization companies with above average-to-book ratios and forecasted growth rates. This report identifies the Fund's investments on June 30, 2004. These holdings are subject to change. Not all stocks in the Fund performed the same, nor is there any guarantee that these stocks will perform as well in the future. Market forecasts provided in this report may not necessarily come to pass. June 30, 2004 William Blair Funds 15 - -------------------------------------------------------------------------------- Large Cap Growth Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) - ----------------------------------------------- ------ Shares Value - ------- --------------------------------------- ------ Common Stocks Information Technology--28.1% 10,050 *BEA Systems, Inc...................... $ 83 7,450 *Dell, Inc............................. 267 9,600 *EMC Corporation....................... 110 6,500 First Data Corporation................. 289 3,450 *Intuit, Inc........................... 133 3,935 Linear Technology Corporation.......... 155 3,400 Paychex, Inc........................... 115 5,475 SAP AG--ADR............................ 229 8,635 *SunGard Data Systems, Inc............. 225 19,052 Taiwan Semiconductor Mfg. Co. Ltd.--ADR 158 ------ 1,764 ------ Health Care--24.7% 2,500 Alcon, Inc.+........................... 197 3,285 *Amgen, Inc............................ 179 2,255 Eli Lilly & Company.................... 158 4,790 Medtronic, Inc......................... 233 9,465 Pfizer, Inc............................ 324 3,740 UnitedHealth Group, Inc................ 233 2,550 *Zimmer Holdings, Inc.................. 225 ------ 1,549 ------ Consumer Discretionary--12.8% 5,200 *Bed, Bath & Beyond, Inc............... 200 3,685 Clear Channel Communications, Inc...... 136 7,000 *Cox Communications, Inc., Class "A"... 195 2,300 Harley-Davidson, Inc................... 142 3,000 *Kohl's Corporation.................... 127 ------ 800 ------ Financials--10.6% 2,250 Federal National Mortgage Association.. 160 6,000 SLM Corporation........................ 243 3,770 State Street Corporation............... 185 975 XL Capital Ltd., Class "A"+............ 74 ------ 662 ------ - ---------- * Non-income producing securities + U.S. listed foreign security ADR = American Depository Receipt - -------------------------------------------- ------ Shares Value - --------- ---------------------------------- ------ Common Stocks--(continued) Consumer Staples--10.5% 2,900 Avon Products, Inc................ $ 134 3,150 PepsiCo, Inc...................... 170 2,600 Wal-Mart Stores, Inc.............. 137 6,025 Walgreen Co....................... 218 ------ 659 ------ Industrials and Services--7.0% 5,212 Danaher Corporation............... 270 5,150 General Electric Company.......... 167 ------ 437 ------ Energy--2.3% 1,450 Apache Corporation................ 63 3,250 Suncor Energy, Inc.+.............. 83 ------ 146 ------ Materials--2.3% 4,550 Ecolab, Inc....................... 144 ------ Total Common Stock--98.3% (cost $5,382)............................... 6,161 ------ Investment in Affiliate 106,899 William Blair Ready Reserves Fund. 107 ------ Total Investment in Affiliate--1.7% (cost $107)................................. 107 ------ Total Investments--100.0% (cost $5,489)............................... 6,268 Cash and other assets, less liabilities--0.0% -- ------ Net assets--100.0%........................... $6,268 ====== See accompanying Notes to Financial Statements. 16 Semi-Annual Report June 30, 2004 [PHOTO] Michael P. Balkin Michael P. Balkin [PHOTO] BREWER Karl W. Brewer - -------------------------------------------------------------------------------- SMALL CAP GROWTH FUND - -------------------------------------------------------------------------------- The Small Cap Growth Fund invests primarily in common stocks of small domestic growth companies that are expected to have solid growth in earnings. - -------------------------------------------------------------------------------- AN OVERVIEW FROM THE PORTFOLIO MANAGERS - -------------------------------------------------------------------------------- How did the Fund perform over the last year? The Small Cap Growth Fund posted a 5.05% gain on a total return basis (Class A Shares reflecting the impact of the maximum sales load) for the 6 months ended June 30, 2004. This was ahead of its benchmark, the Russell 2000 Growth(R) Index, which increased 5.68% during the period, and the Russell 2000(R) Index, which rose 6.76%. What were the most significant factors impacting Fund performance? What factors were behind the Fund's outperformance versus the benchmark? When compared to its benchmark, the Small Cap Growth Fund had outperformance in every significant sector (i.e., sectors with over a 5% weight in the Russell 2000(R) Growth Index) in the first half of the year. Small cap stocks were again the best performing asset class in the first quarter as the Russell 2000(R) Index closed at an all time high versus the S&P 500 on a trailing 52-week relative return basis. In the second quarter, the Russell 2000(R) achieved its fifth consecutive up quarter in a row, which had not happened since 1995-96, when the Russell 2000(R) posted six consecutive positive quarters. A change in leadership occurred in the second quarter, as the larger capitalization stocks, as measured by the S&P 500 and Russell 1000 Indices, modestly outpaced the small cap stocks. In contrast to 2003, the most significant impact on the Russell 2000(R) Growth's performance in the first half of the year came from the larger market cap companies in the index as investors shifted their focus away from the more speculative, low-priced micro cap stocks. In the Fund, stock selection in the middle of the small capitalization range was a large benefit to relative performance. While the small cap markets were relatively strong in the first quarter, the second quarter witnessed a more turbulent period. Following a negative start in April and early May, the equity markets turned in the middle of the second quarter and ended in positive territory. Mixed signals on the economic and political fronts created increased volatility and uncertainty during the period. With continued instability in the Middle East contributing to higher oil prices, energy stocks performed well in the second quarter both for the benchmark and the Fund. With the virtually "pre-announced" 0.25% increase in rates by the Federal Reserve, and some remaining concerns about future rate increases, Financial Services, Consumer and Technology stocks in the Russell 2000(R) Growth Index were hit the hardest in the quarter. Which sectors enhanced the Fund's return? What were among the best performing investments for the Fund? The Fund outperformed the benchmark in most sectors, including all of the four major sectors (Consumer Discretionary, Healthcare, Technology and Financial Services) during the first half of the year. The Fund's most significant contributors to absolute performance for the first half of the year were in the Consumer Discretionary and Health Care Sectors, while June 30, 2004 William Blair Funds 17 Technology was the largest contributor to relative performance. The Fund was slightly overweight the Energy sector and our holdings outperformed those in the benchmark. Quicksilver Resources, Inc., a natural gas producer focused primarily on the western United States and Canada, was one of our top contributors to performance. The stock was up significantly in the second quarter due to a combination of successful drilling on several key properties along with an overall strong energy market. The Health Care sector was our biggest contributor to performance in the second quarter and the second largest contributor for the first half of 2004. Although we had a slight underweight in the group relative to the benchmark, our strong stock selection allowed us to significantly outperform the index. Performance was led by three medical device companies (Cyberonics, Kensey Nash Corporation and Integra LifeSciences). Were there any investment strategies or themes that did not measure up to your expectations? While there were no major themes or sectors that disappointed us in the first half, there were individual stocks that performed poorly. Examples of weaker performing stocks include: Vistacare, Inc., a hospice care provider; Alliance Gaming, a casino operator; Asyst Technologies, a manufacturer of ultra-clean semi-conductor systems. In each case, the company gave disappointing earnings guidance, causing the stocks' price to decline. What is your current strategy? How is the Fund positioned? While we were pleased with our performance at mid-year, we believe that the second half of the year could be a more difficult environment. Concerns over higher interest rates, continued instability in the Middle East, increasing energy prices and a slowdown in consumer spending could create some headwinds. Also, uncertainty regarding the outcome of the upcoming Presidential election is likely to create increased volatility in the market. Given these issues, we anticipate that the market could remain in a trading range over the next several quarters. Regardless of overall market trends, we will continue to seek smaller capitalization companies that generally offer interesting opportunities for growth. We believe that the Fund is well positioned for what we think is a "stock pickers" type of market. 18 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Small Cap Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Performance Highlights - -------------------------------------------------------------------------------- Annual Total Return without the maximum sales load ---------------------------------------------------------------------- 6/30/2004(a) 2003 2002 2001 2000 1999(a)(b) ------------ ------ ------------ ----- ------ ---------- Small Cap Growth Fund Class A 11.46% 61.81% (17.20)% 25.91% 33.68% 1.90% Russell 2000(R) Growth Index. 5.68 48.54 (30.26) (9.23) (22.43) 5.22 Russell 2000(R) Index........ 6.76 47.25 (20.48) 2.49 (3.02) 4.26 ---------------------------------------------------------------------------- Average Annual Total Return at 6/30/2004 reflecting the maximum sales load ---------------------------------------------------------------------- Since 1 Year 3 Year Inception(c) -------------- ------ ------------ Small Cap Growth Fund Class A 35.90% 14.00% 21.57% Small Cap Growth Fund Class B 38.14 14.63 22.01 Small Cap Growth Fund Class C 42.20 15.38 22.24 -------------------------------------- (a)Total return is not annualized for periods that are less than a full year. (b)For the period from December 27, 1999 (Commencement of Operations) to December 31, 1999. (c)For the period from December 27, 1999 to June 30, 2004. Illustration of an assumed investment of $10,000 with reinvestment of capital gain distribution [CHART] Russell Small Cap 2000(R) Russell Growth Fund Growth 2000(R) Class A Index Index 12/99 $ 9,400 $10,000 $10,000 6/00 14,100 10,700 10,700 12/00 12,800 8,200 10,100 6/01 15,400 8,200 10,800 12/01 16,200 7,400 10,400 6/02 15,500 6,100 9,900 12/02 14,400 5,200 8,200 6/03 16,700 6,200 9,700 12/03 21,700 7,700 12,100 6/04 24,100 8,100 13,000 IPOs made significant contributions to the performance of the Fund in the year 2000. There can be no assurance that such contributions will continue. Recent market volatility has significantly impacted performance and the Fund's current performance may be more or less than that shown. Past performance does not guarantee future results. Total returns shown assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. Investing in smaller companies involves special risks, including higher volatility and lower liquidity. From time to time, the investment advisor may waive fees or reimburse expenses for the Fund. Without these waivers, performance would be lower. Class A, B and C shares are not available for sale. The performance highlights and graph presented above do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The Russell 2000(R) Growth Index consists of small-capitalization companies with above average price-to-book ratios and forecasted growth rates. The Russell 2000(R) Index is an unmanaged composite of the smallest 2000 stocks of the Russell 3000(R) Index. This report identifies the Fund's investments on June 30, 2004. These holdings are subject to change. Not all stocks in the Fund performed the same, nor is there any guarantee that these stocks will perform as well in the future. Market forecasts provided in this report may not necessarily come to pass. June 30, 2004 William Blair Funds 19 - -------------------------------------------------------------------------------- Small Cap Growth Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) - ------------------------------------------------------ -------- Shares Value - ------------------------------------------------------ -------- Common Stocks Consumer Discretionary--38.6% 416,065 *4 Kids Entertainment, Inc................. $ 9,952 380,575 *Alliance Gaming Corporation............... 6,531 1,138,630 *Casual Male Retail Group, Inc............. 8,312 358,100 *Century Casinos, Inc...................... 1,952 191,047 *Charles River Associates.................. 5,913 1,079,355 *chinadotcom corporation+.................. 7,966 326,195 *Corrections Corporation of America........ 12,881 343,830 *Cross Country Healthcare, Inc............. 6,241 395,710 *Cumulus Media, Inc., Class "A"............ 6,652 203,700 *Elizabeth Arden, Inc...................... 4,286 313,580 *Emmis Communications Corporation, Class "A"................................. 6,579 1,266,025 *eUniverse, Inc............................ 2,811 220,560 *FirstService Corporation+................. 5,514 358,650 Fred's, Inc................................ 7,923 114,235 *Getty Images, Inc......................... 6,854 203,925 *Guitar Center, Inc........................ 9,068 670,515 *Kforce, Inc............................... 6,330 678,630 *Labor Ready, Inc.......................... 10,519 493,020 *Laureate Education, Inc................... 18,853 1,878,430 *Lions Gate Entertainment Corporation+..... 13,111 283,935 *Multimedia Games, Inc..................... 7,615 375,520 Ruby Tuesday, Inc.......................... 10,308 429,870 *Scientific Games Corporation, Class "A"... 8,228 308,661 *Shuffle Master, Inc....................... 11,207 724,720 *SkillSoft plc--ADR........................ 5,508 287,920 Speedway Motorsports, Inc.................. 9,628 225,680 StarTek, Inc............................... 8,079 74,570 Strayer Education, Inc..................... 8,320 363,100 *TiVo, Inc................................. 2,574 640,380 *ValueClick, Inc........................... 7,671 463,005 *ValueVision Media, Inc., Class "A"........ 6,028 623,600 World Wrestling Entertainment, Inc......... 7,951 -------- 251,365 -------- Health Care--19.8% 193,588 *Accredo Health, Inc....................... 7,540 385,900 *American Healthways, Inc.................. 10,273 757,770 *Axcan Pharma, Inc.+....................... 15,989 916,940 *Cell Therapeutics, Inc.................... 6,758 393,280 *Connectics Corporation.................... 7,944 1,228,019 *Discovery Partners International, Inc..... 6,263 144,010 *Icon PLC--ADR............................. 6,335 371,775 *Intergra Lifesciences Holdings Corporation 13,113 240,755 *Kensey Nash Corporation................... 8,306 297,340 *Lifepoint Hospitals, Inc.................. 11,067 331,325 *Matria Healthcare, Inc.................... 8,306 357,720 *Sangamo Biosciences, Inc.................. 2,153 144,770 *Taro Pharmaceutical Industries, Inc.+..... 6,297 345,795 *Telik, Inc................................ 8,254 3,051,885 *VitalWorks, Inc........................... 10,560 -------- 129,158 -------- Technology--18.2% 485,990 *AMIS Holdings, Inc........................ 8,223 629,590 *Answerthink, Inc.......................... 3,607 - ---------- *Non-income producing securities **Security Fair Valued pursuant to Valuation Procedures adopted by Board of Trustees. ADR = American Depository Receipt + = U.S. listed foreign security ++ = Restricted security. The Fund purchased 507,788 restricted shares on May 18, 2003 at a cost of $6,136 (in thousands). The value of the Fund's holding was 0.75% of net assets at June 30, 2004. - --------------------------------------------------- -------- Shares Value - --------------------------------------------------- -------- Common Stocks--(continued) 469,140 *Artisan Components, Inc................ $ 12,104 776,280 *Aspen Technology, Inc.................. 5,636 198,655 Harris Corporation...................... 10,082 936,300 *LCC International, Inc., Class "A"..... 4,588 2,463,900 *Loudeye Corporation.................... 3,890 502,450 *Mercury Computer Systems, Inc.......... 12,461 19,540 *Nuance Communications, Inc............. 89 316,530 *Open Solutions, Inc.................... 7,907 338,775 *Open Text Corporation+................. 10,807 723,710 *OPNET Technologies, Inc................ 9,480 1,583,985 *Scansoft, Inc.......................... 7,841 297,030 *Semtech Corporation.................... 6,992 807,788 *Ultimate Software Group, Inc.**++...... 7,763 314,785 *WebEx Communications, Inc.............. 6,850 -------- 118,320 -------- Financial Services--10.1% 197,195 *Affiliated Managers Group, Inc......... 9,933 400,285 *Commercial Capital Bancorp, Inc........ 6,953 449,890 *Credit Acceptance Corp................. 6,780 491,657 *Electronic Clearing House.............. 4,573 279,840 *Euronet Worldwide, Inc................. 6,473 128,840 Global Payments, Inc.................... 5,800 226,350 Investors Financial Services Corporation 9,864 341,095 National Financial Partners Corporation. 12,030 361,130 *Rewards Network, Inc................... 3,250 -------- 65,656 -------- Other Energy--4.4% 330,335 *Comstock Resources, Inc................ 6,428 1,698,955 *Gasco Energy, Inc...................... 3,313 1,342,360 *Grey Wolf, Inc......................... 5,692 99,530 *Quicksilver Resources, Inc............. 6,676 185,245 *Ultra Petroleum Corporation............ 6,915 -------- 29,024 -------- Producer Durables--3.0% 607,180 *Crown Castle International Corporation. 8,956 242,450 *Providence Service Corporation......... 4,556 377,480 *Ultratech, Inc......................... 6,145 -------- 19,657 -------- Materials and Processing--2.6% 437,795 Airgas, Inc............................. 10,468 1,039,610 *Comfort Systems USA, Inc............... 6,643 -------- 17,111 -------- Utilities--0.4% 143,800 Intrado, Inc............................ 2,314 -------- Total Common Stock--97.1% (Cost $528,779)................................... 632,605 -------- Investment in Affiliate 14,796,841 William Blair Ready Reserves Fund....... 14,797 -------- Total Investment in Affiliate--2.3% (Cost $14,797).................................... 14,797 -------- Total Investments--99.4% (Cost $543,576)................................... 647,402 Cash and other assets, less liabilities--0.6%...... 4,101 -------- Net assets--100.0%................................. $651,503 ======== See accompanying Notes to Financial Statements. 20 Semi-Annual Report June 30, 2004 [PHOTO] Karl W. Brewer Karl W. Brewer [PHOTO] Harvey H. Bundy, III Harvey H. Bundy, III [PHOTO] Robert Lanphier, IV Robert C. Lanphier, IV - -------------------------------------------------------------------------------- SMALL-MID CAP GROWTH FUND - -------------------------------------------------------------------------------- The Small-Mid Cap Growth Fund primarily invests in a diversified portfolio of common stocks of small and medium-sized domestic growth companies that are expected to experience solid growth in earnings. - -------------------------------------------------------------------------------- AN OVERVIEW FROM THE PORTFOLIO MANAGERS - -------------------------------------------------------------------------------- How did the Fund perform in the first half of the year? How did the Fund's performance compare to its benchmark? The Small-Mid Cap Growth Fund gained 0.79% (Class A shares reflecting the impact of the maximum sales load) on a total return basis for the six months ended June 30, 2004, compared with a 5.65% increase for the Fund's benchmark, the Russell 2500/TM/ Growth Index. What were the most significant factors impacting Fund performance? What factors were behind the Fund's outperformance versus the benchmark? The year opened with a continuation of the speculative frenzy of 2003, as the lower quality names retained their market leadership. However, as the first quarter progressed, we observed a gradual rotation toward quality growth companies. Following a negative start in April and early May, the equity markets ended the second quarter in positive territory. Mixed signals on the economic and political fronts caused the markets to seek a clear direction during the period. Geopolitical issues also caused oil prices to rise during the quarter. In the first half of the year, the strongest performing sectors in the Russell 2500/TM/ Growth Index were Healthcare and Energy while Technology was the only major sector to report a negative return. The Small-Mid Cap Fund's stock selection was the primary contributor to performance in the first half of the year. Healthcare and Transportation were two of the strongest performing sectors in the portfolio. While we were underweight Technology, which contributed to relative performance, we also had strong stock selection in this industry. One of the Small-Mid Cap Fund's strongest performing holdings was Corporate Executive Board. This company provides subscription-based research and information services to senior executives in major corporations in order to enhance management practices. With relatively low capital expenditures, the company is able to significantly leverage its services and achieve high margin growth. During the softer economy, we believed that many new clients put their intentions to subscribe on hold, and would sign up for services once the economy strengthened. This thesis came to fruition as subscriptions increased significantly and the market recognized the outstanding potential for solid earnings growth. Within the Transportation sector, three stocks that fared very well were Expeditors International, C.H. Robinson, and Knight Transportation. Along with strong managements and good business infrastructures, these companies are poised to benefit from the economic recovery as product deployment is on the rise. Due to our fundamental process and conviction in these names, we are carrying an overweight position in Transportation stocks versus the Russell 2500/TM/ Growth Index. June 30, 2004 William Blair Funds 21 Which strategies did not measure up to your expectations? Two industries in which our companies did not meet our expectations were Retailing and Technology Software. In Retailing, 99 Cents Only stores experienced a significant stock price decrease. The company had fared well in their home state of California, but ran into significant difficulty executing their strategy in their newly opened Texas sites. Another Retailing company that had some difficulty during the first half of the year was CarMax. CarMax is a company that has strong management and is well-positioned within the used car sales business, but suffered from significant competition from incentives in the new car market which severely hampered sales. The company continues to be a dominant player in this market and has an ability to be relatively flexible with its product offering, which we believe will bring their earnings back slowly over time. Software companies Intuit and BEA Systems were also disappointments. BEA Systems disappointed investors with their earnings report. Our analysis concluded that BEA would not be able to achieve our expectations on subsequent earnings growth and we exited the position. Slowing revenue growth at Intuit disappointed investors. However, we believe that the current valuation more than discounts this trend. We are still positive on Intuit's ability to generate strong annual growth in earnings and we maintain our position in Intuit. What is your current strategy? How is the Fund Positioned? Our focus continues to be on selecting quality growth companies that should perform well in a moderate economic growth environment. Of the four largest sectors in the Russell 2500/TM/ Growth Index, we are currently overweight Consumer Discretionary, and underweight Technology. Healthcare and Financial Services sectors in the portfolio are relatively close to their respective benchmark weights. 22 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Small-Mid Cap Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Performance Highlights - -------------------------------------------------------------------------------- Annual Total Return without the maximum sales load -------------------------------------- 6/30/2004(a) 2003(a)(b) ------------ ---------- Small-Mid Cap Growth Fund Class A 6.94% (0.60)% Russell 2500(TM) Growth Index.... 5.65 (0.61) -------------------------------------- Average Annual Total Return at 6/30/2004 reflecting the maximum sales load -------------------------------------- Since Inception(c) ------------ Small-Mid Growth Fund Class A (5.60)% Small-Mid Growth Fund Class B 0.90 Small-Mid Growth Fund Class C 4.90 -------------------------------------- (a)Total return is not annualized for periods that are less than a full year. (b)For the period from December 29, 2003 (Commencement of Operations) to December 31, 2003. (c)For the period from December 29, 2003 to June 30, 2004. Illustration of an assumed investment of $10,000 [CHART] Small-Mid Cap Russell 2500 Fund Class A Growth Index ------------- ------------ 12/03 $ 9,400 $10,000 1/04 9,500 10,400 2/04 9,700 10,400 3/04 9,700 10,500 4/04 9,700 10,000 5/04 9,700 10,300 6/04 10,000 10,500 Past performance does not guarantee future results and current performance may be lower or higher than the data quoted. Total returns shown assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. Investing in smaller companies involves special risks, including higher volatility and lower liquidity. From time to time, the investment advisor may waive fees or reimburse expenses for the Fund. Without these waivers, performance would be lower. Class A, B, and C shares are not available for sale. The performance highlights and graph presented above do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The Russell 2500(TM) Growth Index measures the performance of those Russell 2500 companies with above average price-to-book ratios and forcasted growth rates. This report identifies the Fund's investments on June 30, 2004. These holdings are subject to change. Not all stocks in the Fund performed the same, nor is there any guarantee that these stocks will perform as well in the future. Market forecasts provided in this report may not necessarily come to pass. June 30, 2004 William Blair Funds 23 - -------------------------------------------------------------------------------- Small-Mid Cap Growth Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) - -------------------------------------------------- ------ Shares Value - ------- ------------------------------------------ ------ Common Stocks Consumer Discretionary--32.1% 5,400 *99 Cents Only Stores..................... $ 82 4,200 *Bed, Bath and Beyond, Inc................ 161 12,800 *CarMax, Inc.............................. 280 6,300 CDW Corporation........................... 402 4,200 Cintas Corporation........................ 200 6,300 Corporate Executive Board Co.............. 364 4,700 *Corrections Corporation of America....... 186 9,800 *Cross Country Healthcare, Inc............ 178 4,100 *Entercom Communications Corporation...... 153 6,700 Fastenal Company.......................... 381 2,600 *Getty Images, Inc........................ 156 4,400 *Guitar Center, Inc....................... 196 4,800 *Hewitt Associates, Inc., Class "A"....... 132 6,300 *Iron Mountain, Inc....................... 304 5,100 *Lamar Advertising Company................ 221 11,400 *Laureate Education, Inc.................. 436 8,700 *O'Reilly Automotive, Inc................. 393 4,000 *Shuffle Master, Inc...................... 145 13,000 *Skillsoft PLC--ADR....................... 99 1,500 Strayer Education, Inc.................... 167 ------ 4,636 ------ Health Care--19.2% 1,700 *Atrix Labs, Inc.......................... 58 14,600 *Axcan Pharma, Inc.+...................... 308 10,700 *Connectics Corporation................... 216 6,100 *Express Scripts, Inc..................... 483 2,700 *IDEXX Laboratories, Inc.................. 170 8,300 *Integra LifeSciences Holdings Corporation 293 5,800 *IVAX Corporation......................... 139 4,200 *Kensey Nash Corporation.................. 145 4,700 *Medicines Company........................ 144 2,800 *Patterson Companies, Inc................. 214 5,000 *ResMed, Inc.............................. 255 3,900 *Stericycle, Inc.......................... 202 6,400 *Telik, Inc............................... 153 ------ 2,780 ------ Technology--14.9% 5,100 Adobe Systems, Inc........................ 237 8,600 *Artisan Components, Inc.................. 222 8,300 *Cognos, Inc.+............................ 300 8,000 *Intuit, Inc.............................. 309 11,200 *Jabil Circuit, Inc....................... 282 12,400 Microchip Technology, Inc................. 391 11,800 *OPNET Technologies, Inc.................. 155 3,600 Xilinx, Inc............................... 120 1,500 *Zebra Technologies Corp., Class "A"...... 130 ------ 2,146 ------ - ---------- * Non-income producing securities ADR = American Depository Receipt + = U.S. listed foreign security - ------------------------------------------------ ------- Shares Value - ------------------------------------------------ ------- Common Stocks--(continued) Financial Services--10.2% 4,500 *Affiliated Managers Group.............. $ 227 5,000 East West Bancorp, Inc.................. 153 7,500 *Fiserv, Inc............................ 292 8,500 Investors Financial Services Corporation 370 11,200 *SunGard Data Systems, Inc.............. 291 1,800 XL Capital Ltd., Class "A"+............. 136 ------- 1,469 ------- Autos and Transportation--8.1% 4,800 C.H. Robinson Worldwide, Inc............ 220 8,600 Expeditors International of Washington.. 425 4,600 Gentex Corporation...................... 183 11,700 *Knight Transportation, Inc............. 336 ------- 1,164 ------- Other Energy--4.1% 6,500 Apache Corporation...................... 283 5,600 *Smith International, Inc............... 312 ------- 595 ------- Producer Durables--3.1% 18,200 *Crown Castle International Corporation. 268 5,200 Pentair, Inc............................ 175 ------- 443 ------- Materials and Processing--2.3% 14,000 Airgas, Inc............................. 335 ------- Total Common Stock--94.0% (Cost $12,895)................................. 13,568 ------- Investment in Affiliate 760,777 William Blair Ready Reserves Fund....... 761 ------- Total Investment in Affiliate--5.3% (Cost $761).................................... 761 ------- Total Investments--99.3% (Cost $13,656)................................. 14,329 Cash and other assets, less liabilities--0.7%... 107 ------- Net assets--100.0%.............................. $14,436 ======= See accompanying Notes to Financial Statements. 24 Semi-Annual Report June 30, 2004 [PHOTO] GREIG W. George Greig - -------------------------------------------------------------------------------- INTERNATIONAL GROWTH FUND - -------------------------------------------------------------------------------- The International Growth Fund invests primarily in common stocks of foreign growth companies of all sizes. - -------------------------------------------------------------------------------- AN OVERVIEW FROM THE PORTFOLIO MANAGER - -------------------------------------------------------------------------------- How did the Fund perform over the last year? The International Growth Fund posted a -2.92% loss (Class A Shares reflecting the impact of the maximum sales load) for the 6 months ended June 30, 2004. By comparison, the Fund's benchmark, the MSCI All Country World Free excluding US Index, rose 4.10% What were the most significant factors impacting Fund performance? What factors were behind the Fund's underperformance versus the benchmark? The overall MSCI All Country World (Free) except US index fell modestly (0.69)% during the second quarter, but a more severe correction in Asian markets and in cyclical sectors globally impacted our relative performance. On a regional basis, our relative emphasis on Asia (particularly emerging Asia) at the expense of Europe accounted for all of the portfolio's performance shortfall at mid-year. Asian markets continue to be viewed as extremely sensitive to global liquidity and cyclical growth, but it is worth noting that there has been no evidence of any significant slowdown in either economic growth or corporate earnings up to this point. The year started with international markets extending the strong rally that began in 2003 into the first quarter. Broadly speaking, Asian markets and emerging markets more generally outperformed, and small companies continued to outpace large blue chip companies. Within that framework, however, shifting returns reflected new data about the changing dynamic of the global growth cycle. The major new trend to emerge in the first quarter was the increasing strength of Japan, both in economic and market terms. After lagging the rest of the world early in the year, Japan came to life as more and more indicators pointed to continued strong earnings growth and increasing confidence in the economy. Our portfolio benefited from being overweight the benchmark in Japan, but relative returns were impacted by our emphasis on export-oriented sectors. The global equity market climate shifted during the second quarter, as heightened concern about monetary tightening in the US and a state-directed slowdown in China focused attention on potential risks to economic and profit growth, particularly in cyclical sectors and regions. What sectors had the biggest impact on portfolio performance? Technology was the major laggard on a global basis during the second quarter, reversing some of 2003's strong gains as cyclical concerns arose regarding potential oversupply of components and the sustainability of corporate and consumer spending growth in a variety of hardware categories. Conversely, the best performing sector in the global market was Energy, and portfolio positioning in these sectors also detracted from performance. June 30, 2004 William Blair Funds 25 The portfolio continues to carry relatively low exposure to Europe, a position that helped returns during the first quarter, as growth indicators remain inconsistent and relatively weak in most European economies. What is your outlook for the international markets? In both of the recent broad global economic cycles (1981-1990 and 1991-2000) there was a sharp recovery, followed by a moderation of growth accompanied by some monetary tightening. In each case the initial tightening occurred in the '4' year (1984, 1994), and so the analogy is drawn that after the liquidity-driven upturn of 2003, we should anticipate upward pressure on interest rates, and that China and the US--the engines of global growth--could slow significantly. Leading economic indicators, many of them monetary, have indeed slowed on a global basis, and some measures of investment spending and credit growth have decelerated in China. While it is still too early to tell definitively how mild or severe the coming slowdown will be, markets have readily anticipated a relatively bearish scenario. Ironically, until there is clearer evidence of the extent and effects of the slowdown, markets may overreact on the basis of fear of the unknown. Our view of the mid-cycle plateau is that it may well be milder and briefer than the tightening cycle of 1994-95. There are few excesses in the global economic picture and a diminished likelihood of instability in emerging markets. As Asia cools down and Europe begins to reaccelerate, global growth should move into better balance for the remainder of the economic expansion. 26 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- International Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Performance Highlights - -------------------------------------------------------------------------------- Annual Total Return without the maximum sales load ---------------------------------------------------- 6/30/2004(a) 2003 2002 2001 2000 1999(a)(b) ------------ ----- ------ ------ ------ ---------- International Growth Fund Class A..... 3.01% 42.10% (15.14)% (13.63)% (8.11)% 39.12% Morgan Stanley Capital - International (MSCI) All Country World Free Ex-U.S. Index........................ 4.10 41.41 (14.67) (19.50) (15.09) 30.91 Lipper International Index............ 3.86 36.00 (13.84) (19.34) (14.72) 37.83 -------------------------------------- Average Annual Total Return at 6/30/2004 reflecting the maximum sales load -------------------------------------- Since 1 Year 3 Year Inception ------ ------ --------- International Growth Fund Class A 24.22% 3.32% 5.62%(c) International Growth Fund Class B 25.74 3.66 5.05(d) International Growth Fund Class C 29.74 4.56 5.41(d) -------------------------------------- (a)Total return is not annualized for periods that are less than a full year. (b)For the period from October 21, 1999 (Commencement of the Class) to December 31, 1999. (c)For the period from October 21, 1999 to June 30, 2004. (d)For the period from November 2, 1999 (Commencement of the Class) to June 30, 2004. Illustration of an assumed investment of $10,000 with reinvestment of capital gain distributions and income dividends [CHART] International Growth Fund MSCI AC WLD Lipper Int'l Class A Ex-US Index Index 10/99 $ 9,400 $10,000 $10,000 12/99 13,100 10,300 9,600 6/00 13,400 10,000 9,200 12/00 12,000 8,800 8,200 6/01 11,000 7,600 7,200 12/01 10,400 7,100 6,600 6/02 10,500 7,000 6,600 12/02 8,800 6,000 5,700 6/03 9,800 8,300 7,800 12/03 12,500 10,500 9,800 6/04 12,900 11,000 10,100 Past performance does not guarantee future results. Total returns shown assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. International investing involves special risk considerations, including currency fluctuations, lower liquidity, economic and political risk. Class A, B, and C shares are not available for sale. The performance highlights and graph presented above do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The Morgan Stanley Capital International (MSCI) All Country World Free ex-U.S. Index is an unmanaged index that includes developed and emerging markets and reduced Japanese portion, making it more comparable to the International Growth Fund in terms of investment approach. The Lipper International Index is a composite of international growth mutual funds. This report identifies the Fund's investments on June 30, 2004. These holdings are subject to change. Not all stocks in the Fund performed the same, nor is there any guarantee that these stocks will perform as well in the future. Market forecasts provided in this report may not necessarily come to pass. June 30, 2004 William Blair Funds 27 - -------------------------------------------------------------------------------- International Growth Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) - ------------------------------------------------------- -------- Shares Value - ---------- -------------------------------------------- -------- Common Stocks--Europe--24.5% Austria--1.3% 211,500 Erste Bank Der Oester (Banking)............. $ 33,350 -------- Estonia--0.2% 731,560 Hansabank (Banking)......................... 6,178 -------- Finland--0.5% 136,300 Nokian Renkaat Oyj (Automotive)............. 13,324 -------- France--4.6% 376,204 Christian Dior (Apparel and luxury goods)... 24,472 119,500 Hermes International SCA (Apparel and luxury goods)..................................... 24,016 1,139,100 *JC Decaux (Media).......................... 24,518 185,200 Klepierre (Real estate)..................... 12,709 183,397 Mr. Bricolage SA (Home improvement--retail)....................... 6,052 407,368 *Opera (Hospital and nursing management).... 10,525 81,982 Rodriquez Group (Retail trade).............. 4,307 152,900 Sanofi-Synthelabo SA (Pharmaceuticals)...... 9,712 -------- 116,311 -------- Germany--4.7% 575,000 Bayer Motoren Werke (Motor vehicles)........ 25,648 223,561 Did Deutscher Industrie Svc (Commercial services).................................. 6,583 211,000 GFK AG (Commercial services)................ 7,424 66,800 Puma AG (Consumer non-durables)............. 17,116 367,200 SAP AG (Software)........................... 61,319 -------- 118,090 -------- Greece--2.3% 1,031,700 Coca-Cola Hellenic Bottling S.A. (Beverages)................................ 24,215 548,800 EFG Eurobank (Banking)...................... 12,013 364,100 Folli Follie S.A. (Apparel and footwear retailer).................................. 11,659 530,920 National Bank of Greece (Banking)........... 11,607 -------- 59,494 -------- Ireland--1.0% 1,020,200 Anglo Irish Bank plc (Finance).............. 16,029 1,123,600 *Grafton Group (Wholesale distributors)..... 8,987 -------- 25,016 -------- Italy--2.4% 1,797,700 Banco Popolare Di Verona E N (Banking)...... 31,019 1,260,800 Credito Emiliano SpA (Banking).............. 10,402 559,584 Merloni Elettrodemestici SpA (Electronics and appliances)............... 9,994 249,852 Pirelli & C Real Estate (Real estate development)............................... 9,390 -------- 60,805 -------- Spain--1.2% 267,700 Banco Popular Espanol (Banking)............. 15,148 358,400 Grupo Ferrovial S.A. (Industrial services).. 14,963 -------- 30,111 -------- Sweden--2.1% 13,200,000 *Ericsson LM-B Shares (Communications equipment)................................. 39,490 - -------------------------------------------------------- -------- Shares Value - ---------- --------------------------------------------- -------- Common Stocks--Europe--24.5%--(continued) 616,800 Gunnebo AB (Producer manufacturing).......... $ 6,997 190,500 *Oriflame Cosmetics S.A. SDR (Household products)................................... 6,806 -------- 53,293 -------- Switzerland--4.2% 96,900 *Actelion (Biotechnology).................... 11,172 244,300 *Logitech International S.A. (Electronic technology)................................. 11,183 156,850 *Micronas Semiconductor (Electronic technology)................................. 7,168 39,100 Serono S.A., Class "B" (Biotechnology)....... 24,717 741,800 UBS AG (Banking)............................. 52,591 -------- 106,831 -------- United Kingdom--19.7% 1,280,700 *Acambis (Biotechnology)..................... 8,103 477,800 Astrazeneca plc (Pharmaceuticals)............ 21,583 7,132,300 BG Group plc (Industrial services)........... 44,185 4,023,300 *British Sky Broadcasting Group (Media)...... 45,607 4,336,900 Capita Group plc (Commercial services)....... 25,216 844,600 Carnival plc (Hotels, restaurants and leisure activities)................................. 41,257 1,571,800 Cattle's Holdings plc (Finance and leasing).. 9,096 486,300 Cobham plc (Aerospace and defense)........... 12,395 3,496,200 Compass Group plc (Hotels, restaurants and leisure activities)......................... 21,501 961,000 French Connection (Apparel and footwear retail)..................................... 7,279 1,983,100 HBOS plc (Finance)........................... 24,736 652,700 MAN Group plc (Finance)...................... 17,012 695,300 McCarthy & Stone plc (Real estate)........... 7,370 5,209,700 *Michael Page International (Personnel Services)................................... 17,024 655,400 Next plc (Multiline retail).................. 17,022 2,762,600 Premier Farnell (Electronics distributors)... 12,399 1,372,200 Reckitt Benckiser plc (Household products)... 39,113 2,770,000 Smith & Nephew plc (Health care equipment and supplies)............................... 30,038 2,193,600 Standard Chartered plc (Banking)............. 35,945 10,709,500 Tesco plc (Food retailer).................... 52,051 804,500 Warner Chilcott plc (Pharmaceuticals)........ 10,163 -------- 499,095 -------- Canada--5.8% 632,900 *Alimentation Couche-Tard--Class "B" (Food retail)............................... 11,073 447,700 *Cognos Inc. (Software)...................... 16,152 180,800 *MacDonald Dettwiler & Associates (IT consulting)............................. 3,519 1,281,600 Manulife Financial Corp. (Life and health insurance)........................... 51,861 294,000 *Precision Drilling Corp. (Drilling)......... 14,028 234,800 *Research in Motion Ltd. (Wireless telecommunication).......................... 16,081 477,300 *Shoppers Drug Mart Corp. (Retail trade)..... 11,935 883,300 Suncor Energy, Inc. (Energy minerals)........ 22,491 -------- 147,140 -------- Japan--24.5% 230,500 Aeon Credit Service Co., Ltd. (Consumer finance).......................... 15,463 199,300 Aeon Mall Co., Ltd. (Real estate)............ 11,902 See accompanying Notes to Financial Statements. 28 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- International Growth Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) - ---------- -------------------------------------------- -------- Shares Value - ---------- -------------------------------------------- -------- Common Stocks--Japan--24.3%--(continued) 194,000 Arnest One Corp. (Real estate).............. $ 5,894 168,300 Askul Corporation (Retail trade)............ 10,624 944,400 Canon, Inc. (Office electronics)............ 50,437 1,848,000 *Chiyoda Corp. (Construction)............... 13,251 60,200 Don Quijote Co., Ltd. (Multiline retail).... 3,840 336,800 Fast Retailing (Specialty retail)........... 27,513 3,408,500 Hino Motors Ltd. (Trucks, construction and farm machinery)............................ 24,834 294,000 Hoya Corporation (Electronic technology).... 31,005 145,900 Kappa Create Co., Ltd. (Consumer non-durables).............................. 10,126 137,560 Keyence Corporation (Electronic technology)................................ 31,593 54,200 Koha Co., Ltd. (Electronic equipment and instruments)............................... 2,048 304,400 Matsui Securities Co., Ltd. (Financial services).................................. 10,509 372,250 Misumi Corp. (Trading companies and distributors).............................. 12,247 5,424 Mitsubishi Tokyo Financial (Banking)........ 50,775 112,000 Nakanishi Inc. (Medical specialties)........ 8,032 217,000 Neomax Co., Ltd. (Electronic equipment and instruments)............................... 3,537 243,600 Nidec Corporation (Electronic equipment and instruments)............................... 25,151 202,060 Nitori Company Ltd. (Specialty stores)...... 12,701 509,600 Nitto Denko Corporation (Electronic technology)................................ 26,331 321,000 Orix Corporation (Consumer finance)......... 37,046 274,600 Park 24 Co., Ltd. (Commercial services)..... 10,506 3,105 Pasona Inc. (Personnel services)............ 11,157 299,700 Point Inc. (Apparel and footwear retail).... 8,140 189,100 Sawai Pharmaceutical Co., Ltd. (Pharmaceuticals).......................... 8,002 2,417,200 Sharp Corp. (Electronics)................... 38,960 2,943,000 *Shinsei Bank, Ltd. (Banking)............... 18,816 214,200 SMC Corporation (Trucks, construction and farm machinery)............................ 23,373 224,500 Sugi Pharmacy (Food and staple retailing)... 9,229 5,695,000 Sumitomo Trust & Banking Co. (Finance)...... 41,092 1,714,000 Toto Ltd. (Building products)............... 18,142 118,400 USS Co., Ltd. (Commercial services)......... 10,246 -------- 622,522 -------- Emerging Asia--7.6% China--0.4% 14,030,000 Zhejiang Expressway Holding Co. (Transportation infrastructure)............ 10,003 -------- India--3.0% 392,601 Bharat Forge Ltd. (Machinery)............... 5,239 925,600 *Biocon Ltd. (Biotechnology)................ 10,103 1,240,400 HDFC Bank (Banking)......................... 10,012 908,600 Housing Development Finance Corp. (Financial services).................................. 10,225 171,206 Infosys Technologies, Ltd. (Consulting and software services)......................... 20,758 322,500 ING Vysya Bank, Ltd. (Banking).............. 2,598 1,447,300 *Maruti Udyog Ltd. (Automobiles)............ 12,709 854,728 Mphasis BFL, Ltd. (Information technology).. 4,871 -------- 76,515 -------- - ---------- ------------------------------------------------ -------- Shares Value - ---------- ------------------------------------------------ -------- Emerging Asia--7.6%--(continued) Indonesia--0.8% 60,744,500 *Bank Rakyat Indonesia (Banking)................ $ 10,820 24,963,500 Unilever Indonesia Tbk (Household and personal care)................................. 10,461 -------- 21,281 -------- South Korea--2.2% 377,400 Hyundai Motor Co., Ltd. (Automobiles)........... 14,600 97,800 Samsung Electronics Co. (Semiconductors)........ 40,661 -------- 55,261 -------- Taiwan--0.9% 19,646,794 EVA Airways Corp. (Airlines).................... 8,255 4,136,800 Hon Hai Precision Industry (Computers).......... 15,480 -------- 23,735 -------- Thailand--0.3% 9,708,300 *Tisco Finance (Finance, rental and leasing).... 6,468 -------- Asia--6.0% Australia--2.6% 1,080,890 Bendigo Bank Ltd. (Banking)..................... 7,131 1,312,200 Billabong International Ltd. (Apparel and luxury goods)......................................... 7,594 663,100 Macquarie Bank, Ltd. (Financial services)....... 15,774 235,800 Perpetual Trustees Australia (Investment managers)...................................... 7,763 1,578,831 Sigma Company, Ltd. (Medical distributors)...... 9,060 2,308,900 Toll Holdings, Ltd. (Trucking).................. 17,338 -------- 64,660 -------- Hong Kong--3.0% 16,510,000 China Insurance International (Insurance)....... 7,352 71,262,000 Cnooc Ltd. (Oil and gas)........................ 30,209 2,887,500 Esprit Holdings Ltd. (Apparel, footwear and retail)........................................ 12,960 7,775,000 Global Bio-Chem Technol (Food products)......... 4,431 5,949,000 Li & Fung (Distribution services)............... 8,736 7,858,200 Techtronic Industries Co. (Consumer durables)...................................... 12,579 -------- 76,267 -------- Singapore--0.4% 8,482,800 Osim International Ltd. (Consumer sundries)..... 5,260 6,582,000 Unisteel Technology, Ltd. (Electronic components).................................... 5,114 -------- 10,374 -------- Latin America--3.8% Brazil--0.3% 404,400 *Natura Cosmeticos S.A. (Cosmetics)............. 6,502 -------- Chile--1.2% 412,900 *Cencosud S.A.--ADR 144A (Retail stores)........ 7,642 675,400 Lan Chile S.A.--ADR (Airlines).................. 13,035 4,567,464 S.A.C.I. Falabella (Department stores).......... 8,988 -------- 29,665 -------- Mexico--2.3% 15,184,400 America Movil S.A. (Communications)............. 27,636 2,024,800 *Consorcio Ara S.A (Homebuilding)............... 5,840 See accompanying Notes to Financial Statements. June 30, 2004 William Blair Funds 29 - -------------------------------------------------------------------------------- International Growth Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) - ----------- ----------------------------------------- ---------- Shares Value - ----------- ----------------------------------------- ---------- Latin America--3.8%--(continued) 1,648,000 *Urbi Desarrollos Urbanos S.A. (Household durables)............................... $ 5,311 6,139,000 Walmart de Mexico (Retail trade)......... 18,239 ---------- 57,026 ---------- Emerging Europe, Mid-East, Africa--3.7% Egypt--0.7% 744,000 Orascom Construction Industry (Construction).......................... 11,044 851,000 *Orascom Telecommunication Holding GDR (Telecommunications).................... 7,880 ---------- 18,924 ---------- Israel--0.9% 360,100 Teva Pharmaceutical Inds.--ADR (Pharmaceuticals)....................... 24,231 ---------- Poland--0.4% 292,744 Bank Pekao S.A. (Banking)................ 9,829 ---------- South Africa--1.3% 414,963 Edgars Consolidated Stores (Apparel, footwear and retail).................... 9,972 3,120,700 *MTN Group Ltd. (Telecommunication services)............................... 14,441 11,312,500 Network Healthcare Holdings (Health services)............................... 8,174 ---------- 32,587 ---------- Turkey--0.4% 463,403,928 *Enka Insaat (Industrial conglomerates).. 9,523 ---------- Total Common Stock--95.6% (cost $2,006,237)................................... 2,424,411 ---------- - ---------- * Non-income producing securities ADR = American Depository Receipt GDR = Global Depository Receipt All securities excluding those traded on exchanges in this hemisphere, are fair valued pursuant to Valuation Procedures adopted by the Board of Trustees. At June 30, 2004 the Fund's Portfolio of Investments includes the following industry categories: Financials................ 26.8% Consumer Discretionary.... 21.4% Information Technology.... 15.4% Industrials and Services.. 12.0% Healthcare................ 7.9% Consumer Staples.......... 7.8% Energy.................... 4.5% Telecommunication Services 2.7% Materials................. 1.5% ------ 100.0% ====== - ----------- --------------------------------- ---------- Shares or Principal Amount Value - --------------------------------------------- ---------- Preferred Stock Brazil--1.4% 243,070,000 Banco Itau Holding (Banking)..... $ 22,408 979,620 Geradau S.A. (Steel)............. 11,738 ---------- Total Preferred Stock--1.4% (cost $27,753).............................. 34,146 ---------- Investment in Affiliate 23,482,852 William Blair Ready Reserves Fund 23,483 ---------- Total Investments in Affiliate--0.9% (cost $23,483).............................. 23,483 ---------- Short-Term Investments 27,746,000 American Express Demand Note, VRN 1.17% due 7/1/04................ 27,746 ---------- Total Short-term Investments--1.1% (cost $27,746).............................. 27,746 ---------- Total Investments--99.0% (cost $2,085,219)........................... 2,509,786 Cash and other assets, less liabilities--1.0% 26,532 ---------- Net assets--100.0%........................... $2,536,318 ========== At June 30, 2004 the Fund's Portfolio of Investments includes the following currency categories: Japanese Yen.......... 25.3% British Pound Sterling 20.3% Euro.................. 18.8% Canadian Dollar....... 6.0% Swiss Franc........... 4.4% Hong Kong Dollar...... 3.5% Indian Rupee.......... 3.1% Australian Dollar..... 2.6% Mexico Nuevo Peso..... 2.3% South Korean Won...... 2.3% Swedish Krona......... 2.2% United States Dollar.. 2.1% Brazilian Real........ 1.7% South African Rand.... 1.3% All other currencies.. 4.1% ------ 100.0% ====== See accompanying Notes to Financial Statements. 30 Semi-Annual Report June 30, 2004 [PHOTO] GREIG W. George Greig - -------------------------------------------------------------------------------- INTERNATIONAL EQUITY FUND - -------------------------------------------------------------------------------- The International Equity Fund invests primarily in common stocks of large and medium-sized companies included in the Morgan Stanley Capital International All Country World ex-U.S. Index. - -------------------------------------------------------------------------------- AN OVERVIEW FROM THE PORTFOLIO MANAGER - -------------------------------------------------------------------------------- We are pleased to have the International Equity Fund become the newest addition to the William Blair Fund Family and would like to thank our shareholders for investing with us. The International Equity Fund commenced operations on May 24, 2004. Through the period ended June 30, 2004, the Fund posted a loss of -0.57% (Class A shares reflecting the impact of the maximum sales load), behind the 5.18% increase in the Fund's benchmark, the MSCI All Country World (Free) except US Index, for this brief period. I am very enthusiastic about the investment opportunities available to the International Equity Fund. As you may already know, the Fund will primarily invest in large and medium-sized companies in developed market economies and to a limited extent in small-sized companies and Emerging Markets countries. Our investment process seeks to find high quality growth companies for the International Equity Fund's portfolio of investments. These are companies that historically have had superior growth, profitability and quality relative to local markets and relative to companies within the same industry worldwide, and that are expected to continue such performance. In terms of growth, we aim to find companies that have the capability of growing in real terms at least twice the economic growth rate of the markets in which they participate. In terms of quality, we seek to invest in companies with strong management, proprietary market positions, strong asset bases and solid financial characteristics. International Outlook: Moving Toward Mid-Cycle In both of the recent broad global economic cycles (1981-1990 and 1991-2000) there was a sharp recovery, followed by a moderation of growth accompanied by some monetary tightening. In each case the initial tightening occurred in the '4' year (1984, 1994), and so the analogy is drawn that after the liquidity-driven upturn of 2003, we should anticipate upward pressure on interest rates, and that China and the US--the engines of global growth--could slow significantly. Leading economic indicators, many of them monetary, have indeed slowed on a global basis, and some measures of investment spending and credit growth have decelerated in China. While it is still too early to tell definitively how mild or severe the coming slowdown will be, markets have readily anticipated a relatively bearish scenario. Ironically, until there is clearer evidence of the extent and effects of the slowdown, markets may overreact on the basis of fear of the unknown. Our view of the mid-cycle plateau is that it may well be milder and briefer than the tightening cycle of 1994-95. There are few excesses in the global economic picture and a diminished likelihood of instability in emerging markets. As Asia cools down and Europe begins to reaccelerate, global growth should move into better balance for the remainder of the economic expansion. June 30, 2004 William Blair Funds 31 - -------------------------------------------------------------------------------- International Equity Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) - ------------------------------------------------------- ----- Shares Value - ------- ----------------------------------------------- ----- Common Stocks--Europe--31.2% Austria--2.7% 600 Erste Bank Der Oester (Banking)................ $ 95 ---- France--2.3% 400 Hermes International (Apparel and luxury goods) 80 ---- Germany--11.5% 2,100 Bayer Motoren Werke (Motor vehicles)........... 94 300 Puma AG (Consumer non-durables)................ 77 800 SAP AG (Software and programming).............. 134 8,200 *T-Online International AG (Information technology)................................... 94 ---- 399 ---- Greece--1.8% 2,900 EFG Eurobank Egrasias (Banking)................ 63 ---- Ireland--1.7% 3,800 Anglo Irish Bank plc (Finance)................. 60 ---- Italy--2.8% 5,700 Banco Popolare di Verona E N (Banking)......... 98 ---- Spain--1.8% 1,500 Grupo Ferrovial S.A. (Industrial services)..... 63 ---- Sweden--3.8% 44,000 *Ericsson (Communications equipment)........... 132 ---- Switzerland--2.8% 150 Serono S.A (Biotechnology)..................... 95 ---- United Kingdom--21.9% 15,200 BG Group plc (Industrial services)............. 94 8,100 *British Sky Broadcasting Group (Media)........ 92 3,300 *Cairn Energy plc (Energy)..................... 85 10,900 Capita Group plc (Commercial services)......... 63 3,500 Next (Multiline retail)........................ 91 2,700 Premier Farnell (Electronics distributors)..... 12 3,400 Reckitt Benckiser plc (Household products)..... 97 8,700 Smith & Nephew (Healthcare equipment and supplies)..................................... 94 26,900 Tesco plc (Food retailer)...................... 131 ---- 759 ---- Canada--5.7% 2,400 Manulife Financial Corp. (Life and health insurance).................................... 97 1,000 *Research in Motion Ltd. (Wireless telecommunication)............................ 69 1,300 Suncor Energy, Inc. (Energy minerals).......... 33 ---- 199 ---- - ---------- * Non-income producing securities ADR = American Depository Receipt + = U.S. listed foreign security All securities excluding those traded on exchanges in this hemisphere, are fair valued pursuant to Valuation Procedures adopted by the Board of Trustees. - ------------------------------------------------------- ------ Shares or Principal Amount Value - ------------------------------------------------------- ------ Common Stocks--(continued) Japan--18.2% 1,800 Canon, Inc. (Office electronics)............... $ 96 800 Fast Retailing Co. Ltd. (Specialty retail)..... 65 10,000 Hino Motors Ltd. (Trucks, construction and farm machinery).................................... 73 800 Hoya Corporation (Electronic technology)....... 84 300 Keyence Corporation (Electronic technology).... 69 1,100 Nitto Denko Corporation (Electronic technology) 57 5,000 Sharp Corp. (Electronics)...................... 81 15,000 Sumitomo Trust & Banking Co. (Finance)......... 108 ------ 633 ------ Asia--3.7% Australia--1.8% 2,600 Macquarie Bank, Ltd. (Financial services)...... 62 ------ Hong Kong--1.9% 14,500 Esprit Holdings (Apparel, footwear and retail). 65 ------ Latin America--1.8% Mexico--1.8% 34,800 America Movil S.A. (Communications)............ 63 ------ Emerging Europe, Mid-East, Africa--3.8% Israel--1.7% 900 Teva Pharmaceutical Inds.--ADR (Pharmaceuticals)............................. 60 ------ South Africa--2.1% 10,300 Standard Bank Group Ltd. (Banking)............. 72 ------ Total Common Stock--86.3% (cost $2,816)......................................... 2,998 ------ Investment in Affiliate 336,121 William Blair Ready Reserves Fund.............. 336 ------ Total Investment in Affiliate--9.7% (Cost $336) 336 ------ Short-Term Investments 141,000 American Express Demand Note, VRN 1.17% due 7/1/04.............................. 141 ------ Total Short-term Investments--4.0% (cost $141)........................................... 141 ------ Total Investments--100.0% (cost $3,293)......................................... 3,475 Liabilities, plus cash and other assets--0.0%.......... (1) ------ Net assets--100.0%..................................... $3,474 ====== See accompanying Notes to Financial Statements. 32 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- International Equity Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) At June 30, 2004, the Fund's Portfolio of Investments includes the following industry categories: Financials................ 21.9% Consumer Discretionary.... 21.5% Information Technology.... 20.7% Healthcare................ 8.3% Consumer Staples.......... 7.6% Energy.................... 7.1% Industrials............... 6.6% Telecommunication Services 4.4% Materials................. 1.9% ------ 100.0% ====== At June 30, 2004 the Fund's Portfolio of Investments includes the following currency categories: Euro.................. 28.6% British Pound Sterling 25.3% Japanese Yen.......... 21.1% Canadian Dollar....... 6.6% Swedish Krona......... 4.4% Swiss Franc........... 3.2% South African Rand.... 2.4% Hong Kong Dollar...... 2.2% Mexico Nuevo Peso..... 2.1% Australian Dollar..... 2.1% United States Dollar.. 2.0% ------ 100.0% ====== See accompanying Notes to Financial Statements. June 30, 2004 William Blair Funds 33 [PHOTO] MITCHEL David S. Mitchell [PHOTO] PRICE Capucine "Cappy" Price - -------------------------------------------------------------------------------- VALUE DISCOVERY FUND - -------------------------------------------------------------------------------- The Value Discovery Fund invests in small companies that we believe offer a long-term investment value. We do this by seeking to identify undervalued companies with sound business fundamentals--"broken stocks not broken companies." - -------------------------------------------------------------------------------- AN OVERVIEW FROM THE PORTFOLIO MANAGERS - -------------------------------------------------------------------------------- How did the Fund perform over the last year? The Value Discovery Fund posted a -0.82% loss on a total return basis (Class A Shares reflecting the impact of the maximum sales load) for the 6 months ended June 30, 2004. By comparison, the Fund's primary benchmark, the Russell 2000(R) Index, increased 6.76% and the Russell 2000(R) Value Index, rose 7.83%. What were the most significant factors impacting Fund performance? What factors were behind the Fund's underperformance versus the benchmark? At mid-year, our results lagged the benchmark. Underperformance resulted primarily from earnings' disappointments either in actual reported or lower than expected guidance. As the economy has improved and valuations have become richer, the market is much less forgiving of companies that are not delivering results here and now. That being said, earnings misses due to near term inability to recapture spikes in raw material prices (as evidenced in steel, copper, gas, and numerous food commodities) are much more likely to be overcome than those driven by weaker-than-expected demand or an increasingly difficult competitive environment. Which investment strategies enhanced the Fund's return? What were among the best performing sectors for the Fund? Within the portfolio, three sectors stood out from a positive relative contribution perspective during the first half of the year: Other Energy, Producer Durables and Autos and Transportation. Other Energy was the best-performing sector in both absolute and contribution terms during the first half of the year. Veritas, a provider of geophysical studies and exploration services to the petroleum industry, was the top performer. Veritas posted strong year-to-date figures, reflecting an upsurge in demand for their services. Consol Energy, a multi-fuel (coal and gas) energy producer, also posted strong results, reflecting solid performance by its core businesses. Producer Durables was the second-best-performing sector in absolute terms. Performance was driven primarily by Pentair. Historically, Pentair has operated in three business segments: Tools, Water and Enclosures. The marketplace responded favorably to Pentair's announcement to divest itself from its lower-margin tool business to Black & Decker. Additionally, Pentair made an advantageous acquisition of a water technology company. Stock selection was the primary driver of out-performance for our holdings in the Autos and Transportation sector. Landstar System, a transportation services company that provides truckload carrier services, inter-modal transportation services, and expedited air and truck services to shippers, reflected strong revenue growth driven by increasing demand for shipping services. (We have since exited the stock entirely due to valuation.) SCS Transportation, a provider of regional and interregional less-than-truckload and selected truckload service, reported an 89% first quarter year-over-year earnings increase citing an increase in operational efficiency, an enhancement in revenues, as well as an improving economy. 34 Semi-Annual Report June 30, 2004 What were among the weakest performing sectors for the Fund? During the first half of the year, three sectors stood out as detractors from performance: Health Care, Consumer Staples, and Technology. Within the Healthcare sector, First Health Group, a provider of PPO services, clinical cost management, and fee schedule/cost management services, missed analysts' earnings expectations, citing increased competition among health plans trying to gain market share. The lion's share of the shortfall in the Consumer Staples sector came from Interstate Bakeries. Interstate Bakeries is the largest wholesale baker and distributor of fresh baked bread and sweet goods in the U.S. Year to date, Interstate Bakeries has suffered amid the popularity of the current low-carbohydrate diet fads, coupled with rising prices in food commodities such as eggs. Within the Technology sector, Overland Storage, a designer and manufacturer of magnetic tape data storage systems cut its revenue guidance during the first half of the year, pointing to lower-than-expected original equipment manufacturer revenue. This appears to be a function of supply chain management changes at its largest customer, Hewlett Packard, as opposed to weakening end market demand. Are there any specific investments you would like to highlight? Examples of some of the positions that were added to the Fund's portfolio of investments in recent months include the following: .. Nautilus Group is a marketer, developer and manufacturer of branded health and fitness products sold under such names as Nautilus, Bowflex, TreadClimber, Schwinn, StairMaster and Trimline. We are enthusiastic with this "turnaround" story, as Nautilus introduces new products and redirects their marketing focus to the retail channel. .. Spatialight develops, designs, manufactures and markets miniature high-resolution active matrix liquid crystal displays for computer, video and other applications. We expect Spatialight to greatly benefit from the migration to high-definition video equipment. .. Restoration Hardware is a retailer of home furnishings, functional and decorative hardware and related merchandise. We are impressed with the vision new senior management brings to this company to increase sales and margins. .. General Cable is engaged in the development, design, manufacturing, marketing and distribution of copper, aluminum and fiber-optic wire and cable products. This company is well poised to lead the way as the wire and cable industry recovers and construction and infrastructure spending and demand increases. The following positions were eliminated during the second quarter as they achieved our price targets and we took profits re-deploying proceeds to more attractive opportunities: .. Yellow Roadway, a provider of transportation services to the less-then-truckload market throughout North America. .. Bank of Hawaii, a provider of a range of financial products and services in Hawaii and the Pacific Islands. .. NCI Building Systems, a manufacturer and marketer of building and framing systems, self-storage buildings, overhead doors and other components for the residential, commercial, industrial and agricultural markets. .. Landstar System, a transportation services company that provides truckload carrier services, inter-modal transportation services, and expedited air and truck services to shippers. June 30, 2004 William Blair Funds 35 What is your current strategy? How is the Fund positioned? Despite lagging the benchmark near-term, early returns from the earnings season subsequent to quarter end are running positive and we have taken multiple opportunities to re-deploy profits into more attractive expected returns both within and previously outside the portfolio. A combination of inflationary pressure, uncertainty regarding the upcoming election, and a slow-down in mutual funds cash inflows continues to contribute to excessive market volatility. Market turmoil creates opportunity and we diligently work to uncover companies benefiting from short-term neglect or undervaluation. We continue to emphasize companies with strong managements, solid financials, and competitive positions that should experience earnings growth in even modest economic expansion. 36 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Value Discovery Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Performance Highlights - -------------------------------------------------------------------------------- Annual Total Return without the maximum sales load ---------------------------------------------------- 6/30/2004(a) 2003 2002 2001 2000 1999(a)(b) ------------ ----- ------ ----- ----- ---------- Value Discovery Fund Class A 5.23% 39.12% (10.54)% 17.42% 19.09% 9.01% Russell 2000(R) Index....... 6.76 47.25 (20.48) 2.49 (3.02) 21.26 Russell 2000(R) Value Index. 7.83 46.03 (11.43) 14.03 22.83 (1.49) ---------------------------------------------------- Average Annual Total Return at 6/30/2004 reflecting the maximum sales load ---------------------------------------------------- Since 1 Year 3 Year Inception ------ ------ --------- Value Discovery Fund Class A 24.09% 7.54% 14.53%(c) Value Discovery Fund Class B 25.67 7.99 14.81(c) Value Discovery Fund Class C 29.66 8.84 14.97(d) ------------------------------------------------------------------ (a)Total return is not annualized for periods that are less than a full year. (b)For the period from November 2, 1999 (Commencement of the Class) to December 31, 1999. (c)For the period from November 2, 1999 to June 30, 2004. (d)For the period from November 3, 1999 (Commencement of the Class) to June 30, 2004. Illustration of an assumed investment of $10,000 with reinvestment of capital gain distributions and income dividends [CHART] Value Russell Russell Discovery 2000(R) 2000(R) Fund Class A Index Value 11/99 $9,400 $10,000 $10,000 12/99 10,300 11,700 10,300 06/00 11,500 12,100 10,900 12/00 12,200 11,300 12,600 06/01 14,300 12,100 14,200 12/01 14,400 11,600 14,400 06/02 16,100 11,100 15,400 12/02 12,900 9,200 12,700 06/03 14,300 10,900 14,800 12/03 17,900 13,600 18,600 6/04 18,800 14,500 20,100 Past performance does not guarantee future results. Total returns shown assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. Investing in smaller companies involves special risks, including higher volatility and lower liquidity. From time to time, the investment adviser may waive fees or reimburse expenses for the Fund. Without these waivers, performance would be lower. Class A, B and C shares are not available for sale. The performance highlights and graph presented above do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The Russell 2000(R) Index is the Fund's primary benchmark. The Russell 2000(R) Index is unmanaged composite of the smallest 2000 stocks of the Russell 3000 Index. The Russell 2000(R) Value Index consists of small-capitalization companies with below average price-to-book ratios and forecasted growth rates. This report identifies the Fund's investments on June 30, 2004. These holdings are subject to change. Not all stocks in the Fund performed the same, nor is there any guarantee that these stocks will perform as well in the future. Market forecasts provided in this report may not necessarily come to pass. June 30, 2004 William Blair Funds 37 - -------------------------------------------------------------------------------- Value Discovery Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) - ----------------------------------------------- ------- Shares Value - ------- --------------------------------------- ------- Common Stocks Financial Services--21.7% 114,100 Agree Realty Corporation............... $ 2,887 234,905 American Financial Realty Trust........ 3,357 132,790 AmerUs Group, Class "A"................ 5,498 65,810 Astoria Financial Corporation.......... 2,407 103,585 Brandywine Realty Trust................ 2,816 49,436 City Bank (Lynnwood, WA)............... 1,583 130,655 Donegal Group, Inc., Class "A"......... 2,618 86,085 First Financial Holdings, Inc.......... 2,480 225,985 *Franklin Bank Corporation............. 3,575 583,750 *Meadowbrook Insurance Group, Inc...... 3,094 232,610 National Financial Partners Corporation 8,204 130,020 Ryder System, Inc...................... 5,210 329,220 *U.S.I. Holdings Corporation........... 5,202 309,080 *United Rentals, Inc................... 5,529 260,390 Winston Hotels, Inc.................... 2,695 ------- 57,155 ------- Consumer Discretionary--21.6% 208,910 *BJ's Wholesale Club, Inc.............. 5,223 198,621 Cadmus Communications Corporation...... 2,930 142,280 Christopher & Banks Corporation........ 2,520 391,590 *Elizabeth Arden, Inc.................. 8,239 77,140 Ethan Allen Interiors Inc.............. 2,770 126,340 *Heidrick & Struggles International.... 3,750 343,335 *K2, Inc............................... 5,390 50,855 Michaels Stores, Inc................... 2,797 144,195 Nautilus Group, Inc.................... 2,813 211,100 *Navigant Consulting, Inc.............. 4,526 310,515 *Prime Hospitality Corporation......... 3,298 404,605 *Restoration Hardware, Inc............. 2,958 86,345 *Sharper Image Corporation............. 2,710 142,450 *Tech Data Corporation................. 5,574 178,800 *Whitehall Jewellers, Inc.............. 1,337 ------- 56,835 ------- Materials and Processing--14.0% 91,865 Boise Cascade Corporation.............. 3,458 196,645 Ferro Corporation...................... 5,246 632,505 *GrafTech International Ltd............ 6,616 138,475 *Jones Lang LaSalle, Inc............... 3,753 342,976 LSI Industries, Inc.................... 3,944 557,280 Polyone Corporation.................... 4,146 140,830 Spartech Corporation................... 3,653 214,430 Watsco, Inc............................ 6,019 ------- 36,835 ------- Technology--9.0% 193,902 Avnet, Inc............................. 4,402 553,490 *Borland Software Corporation.......... 4,699 197,975 *Checkpoint Systems, Inc............... 3,550 258,200 *Overland Storage, Inc................. 3,431 167,410 *SPSS, Inc............................. 3,008 471,022 *Tier Technologies, Inc., Class "B".... 4,588 ------- 23,678 ------- Other Energy--7.7% 167,156 Consol Energy, Inc..................... 6,018 192,250 *Forest Oil Corporation................ 5,334 - ---------- * Non-income producing ** = Fair Valued pursuant to Valuation Procedures adopted by the Board of Trustees. ADR= American Depository Receipt ----------------------------------------------- -------- Shares or Principal Amount Value ----------------------------------------------- -------- Common Stocks--(continued) 468,530 *Newpark Resources, Inc................ $ 2,905 258,075 *Veritas DGC, Inc...................... 5,974 -------- 20,231 -------- Health Care--7.2% 206,275 *Albany Molecular Research............. 2,667 184,210 Alpharma, Inc., Class "A".............. 3,773 480,965 *Discovery Partners International, Inc. 2,453 525,435 *Encore Medical Corporation............ 3,310 160,395 *First Health Group Corporation........ 2,504 240,570 *SOLA International, Inc............... 4,145 -------- 18,852 -------- Producer Durables--7.1% 198,400 *Agco Corporation...................... 4,042 301,220 *Artesyn Technologies, Inc............. 2,711 131,315 Belden, Inc............................ 2,814 488,700 General Cable Corporation.............. 4,178 92,885 Pentair, Inc........................... 3,125 77,290 Robbins & Myers, Inc................... 1,735 -------- 18,605 -------- Consumer Staples--4.3% 492,810 *Del Monte Foods Company............... 5,007 316,725 *Interstate Bakeries Corporation....... 3,436 75,815 *Robert Mondavi Corporation, Class "A". 2,807 -------- 11,250 -------- Utilities--3.0% 194,620 Atmos Energy Corporation............... 4,980 171,090 *IDT Corporation....................... 3,085 -------- 8,065 -------- Autos and Transportation--3.0% 105,810 BorgWarner, Inc........................ 4,631 128,675 *SCS Transportation, Inc............... 3,396 -------- 8,027 -------- Consumer Cyclical--0.6% 255,655 *Spatialight, Inc...................... 1,547 -------- Total Common Stock--99.2% (cost $203,695)............................... 261,080 -------- Convertible Bonds 2,157 Midwest Express Holdings, 6.750%, due 10/1/08**................. 1,799 -------- Total Convertible Bonds--0.7% (Cost $2,157)................................. 1,799 -------- Investment in Affiliate 2,172 William Blair Ready Reserves Fund...... 2,172 -------- Total Investment in Affiliate--0.8% (cost $2,172)................................. 2,172 -------- Total Investments--100.7% (cost $208,024)............................... 265,051 Liabilities, plus cash and other assets--(0.7)% (1,837) -------- Net assets--100.0%............................. $263,214 ======== See accompanying Notes to Financial Statements. 38 Semi-Annual Report June 30, 2004 [PHOTO] KAPLAN James S. Kaplan [PHOTO] Chris Vincent Christopher T. Vincent - -------------------------------------------------------------------------------- INCOME FUND - -------------------------------------------------------------------------------- The Income Fund invests in intermediate-term income-producing debt securities. - -------------------------------------------------------------------------------- AN OVERVIEW FROM THE PORTFOLIO MANAGERS - -------------------------------------------------------------------------------- How did the Fund perform over the last year? The Income Fund posted a -2.49% loss on a total return basis (Class A Shares reflecting the impact of the maximum sales load) for the 6 months ended June 30, 2004. By comparison, the Fund's benchmark, the Lehman Intermediate Government/Credit Bond Index, declined 0.11%, while the Fund's peer group, the Morningstar Short-Term Bond Category decreased 0.06%. What were the most significant factors impacting Fund performance? What factors were behind the Fund's underperformance versus the benchmark? The Fund's slight underperformance versus its benchmark largely reflected the performance of its mortgage-backed and asset-backed securities. Mortgage-backed and asset-backed securities performed relatively well during the first quarter, although prices of the mortgage-backed sector lagged equivalent duration Treasury prices in March, based on expectations prepayments would increase during the months ahead. One asset-backed security was unexpectedly downgraded by a rating agency during the first quarter, which acted as a slight drag on portfolio performance, and helped contribute to modest underperformance versus our benchmark during that period. The Fund gained ground during the second quarter, reflecting the yield advantage of corporate, mortgage and asset-backed securities versus U.S. Treasury securities. The first quarter was marked by a significant drop in interest rates, which was sparked by the February U.S. employment report. The Labor Department reported in early March that the economy added 83,000 jobs in February, which was down sharply from January's gain and well below the type of growth experienced in the 1980's and 1990's. The meager gain in jobs coupled with the overall unemployment rate holding steady at 5.6% caused interest rates to decline sharply and bond prices rallied. For example, prices on 10-year U.S. Treasury notes gained by 4.6% during the first quarter. Corporate bond spreads were relatively stable during the first quarter, after experiencing a major bull market in 2003. Corporate bonds considerably outperformed Treasury securities during most of last year, as the prices of these bonds rallied in response to signs that an economic rebound would improve the credit outlook for companies issuing bonds. Interest rates were the biggest driver of Fund performance during the second quarter. Interest rates made a significant move higher during the quarter, only to recede slightly at the end of June. For example, the yield on 10-year U.S. Treasury Notes stood at 3.84% on March 31, rose to 4.87% by June 14, and eased back to 4.58% on June 30. The rise in rates mirrored the signs of improved business confidence in the economy and its prospects. The Labor Department reported that employers added 208,000 jobs to non-farm payrolls in May, and that hiring in March and April was more robust than had previously been reported. As mentioned, the positive yield advantage across all of the "spread" sectors contributed to the Fund's performance. This positive differential was especially noticeable in the mortgage- and asset-backed sectors of the fixed-income markets, which benefited from a decline in prepayments. June 30, 2004 William Blair Funds 39 Late in the second quarter geopolitical events had a positive impact on the markets, as the U.S. transfer of sovereignty to an interim Iraqi government ahead of the June 30/th/ deadline calmed those investors who were anxious about the potential for problems. Which investment strategies enhanced the Fund's return? Were there any investment strategies that produced the best results? Our investment strategy through the first half of the year has been to exploit the yield advantage of corporate, mortgage and asset-backed securities versus U.S. Treasury securities. These securities have generated higher yields and exhibited relatively stable returns for the quarter. Corporate bond spreads have been underpinned by a lack of supply and a dearth of new issuance. In addition, as corporations have benefited from productivity gains, credit quality has improved. As a result of the improved credit quality, there have been fewer downgrades of corporate issues and an increased number of upgrades, when compared to the environment a several years ago. The market has gone from a period where corporate bonds were too cheap--reflecting a lack of demand in the aftermath of a period of corporate scandals--to a period during the first quarter of this year marked by fair value and renewed investor confidence, and finally to an environment in the second quarter which there has been less discrimination in terms of bond valuations. What were among the weakest performing sectors for the Fund? There really was not any sector that stood out in terms of weaker-than expected performance during the first half of the year. As we mentioned, one asset-backed security was unexpectedly downgraded by a rating agency during the first quarter, which acted as a slight drag on portfolio performance. That security was subsequently sold out of the Fund's portfolio of investments. What is your current strategy? How is the Fund positioned? We remain on the "defensive side" with respect to interest rates. The fixed-income markets are currently "discounting,"--that is, expecting--the possibility that the Federal Reserve Board will nudge interest rates higher, in a series of three-to-four 0.25% rate hikes over the balance of 2004. We believe corporate bond spreads should remain supported by improving credit fundamental considerations and by the favorable supply/demand characteristics we mentioned earlier. It is worth noting that the fixed income markets--and the corporate bond market in particular--have yet to experience any "crowding out" from any increased borrowing demands on the part of the U.S. Government to finance the budget deficit. We expect rates to move higher in an orderly manner, and have confidence owning "callable" mortgage-backed and asset-backed securities. We believe a great deal of "call risk' has left the market. The refinancing boom is largely over, and the outlook for prepayments has significantly improved from earlier this year as well as one year ago. We intend to maintain our commitment to our current strategy within the Corporate, Asset-backed and Mortgage-backed markets, deploying new money as it becomes available within each sector. Consequently, the Fund will remain overweight in favor of corporate bonds as well as mortgage-backed and asset-backed issues, and underweight in Treasury and Agency securities. We still see value in a variety of sectors and asset classes, and believe we can add significant value as managers in our ability to reinvest principal and interest in sectors, such as asset-backed securities, that will provide the Fund's portfolio with meaningful differentiation in yield when compared to U.S. Treasury securities. 40 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Income Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Performance Highlights - -------------------------------------------------------------------------------- Annual Total Return without the maximum sales load ---------------------------------------------------- 6/30/2004(a) 2003 2002 2001 2000 1999(a)(b) ------------ ---- ---- ---- ----- ---------- Income Fund Class A.......... (0.50)% 3.56% 7.86% 7.26% 10.20% 0.63% Lehman Intermediate Government/Credit Bond Index (0.11) 4.31 9.84 8.96 10.12 0.39 -------------------------------------- Average Annual Total Return at 6/30/2004 reflecting the maximum sales load -------------------------------------- Since 1 Year 3 Year Inception ------ ------ --------- Income Fund Class A (1.89)% 4.10% 5.69%(c) Income Fund Class B (2.56) 3.22 4.84(d) Income Fund Class C (1.48) 4.10 5.12(e) -------------------------------------- (a)Total return is not annualized for periods that are less than a full year. (b)For the period from October 25, 1999 (Commencement of the Class) to December 31, 1999. (c)For the period from October 25, 1999 to June 30, 2004. (d)For the period from November 2, 1999 (Commencement of the Class) to June 30, 2004. (e)For the period from November 3, 1999 (Commencement of the Class) to June 30, 2004. Illustration of an assumed investment of $10,000 with reinvestment of capital gain distributions and income dividends [CHART] Income Fund Lehman Intermediate Class A Gov/Credit Index 10/99 $9,800 $10,000 12/99 9,900 10,100 06/00 10,200 10,400 12/00 10,900 11,100 06/01 11,200 11,500 12/01 11,600 12,100 06/02 12,000 12,500 12/02 12,600 13,300 06/03 12,900 13,800 12/03 13,000 13,800 6/04 12,900 13,800 Past performance does not guarantee future results. Total returns shown assume reinvestment of dividends and capital gains. Investment returns and principal will fluctuate and you may have a gain or loss when you sell shares. Class A, B and C shares are not available for sale. The performance highlights and graph presented above do not reflect the deduction of taxes that a shareholder would pay on fund distributions or the redemption of fund shares. The Lehman Intermediate Government/Credit Bond Index indicates broad intermediate government/corporate bond market performance. This report identifies the Fund's investments on June 30, 2004. These holdings are subject to change. Not all investments in the Fund performed the same, nor is there any guarantee that these investments will perform as well in the future. Market forecasts provided in this report may not necessarily come to pass. June 30, 2004 William Blair Funds 41 - -------------------------------------------------------------------------------- Income Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all amounts in thousands) (unaudited) - ------------------------------------------------------- ------ Principal Amount Value - ------------------------------------------------------- ------ U.S. Government and U.S. Government Agency--7.4% U.S. Treasury--5.1% $ 3,000 U.S. Treasury Note, 6.000%, due 8/15/09........ $3,297 8,000 U.S. Treasury Note, 6.500%, due 2/15/10........ 9,014 1,500 1,434 - ------- U.S. Treasury Note, 3.875%, due 2/15/13........ ------ 12,500 13,745 - ------- Total U.S. Treasury Obligations................ ------ Government National Mortgage Association (GNMA)-- 2.2% 3,543 #616250, 6.000%, due 2/15/24................... 3,654 2,250 2,331 - ------- #2002-48, Tranche 0B, 6.000%, due 5/16/30...... ------ 5,793 5,985 - ------- Total Government National Mortgage Association. ------ Small Business Administration--0.1% -- Receipt for Multiple Originator Fees, #3, 0.814%, due 11/01/08 (Interest Only) WAC...... 64 149 157 - ------- Loan #100023, 9.375%, due 11/25/14............. ------ 149 221 - ------- Total Small Business Administration Obligations ------ Federal Home Loan Mortgage Corp. (FHLMC)--18.9% 1,084 #G10067, 7.000%, due 1/1/08.................... 1,131 354 #G10147, 8.500%, due 2/1/08.................... 371 2,200 #1601, Tranche PJ, 6.000%, due 10/15/08, VRN... 2,275 1,561 #1612, Tranche SE, 8.100%, due 11/15/08, VRN... 1,639 1,444 #E80050, 6.000%, due 10/1/09................... 1,513 1,011 #G90028, 7.000%, due 5/15/09................... 1,072 1,185 #G90019, 7.500%, due 12/17/09.................. 1,260 5,500 7.000%, due 3/15/10............................ 6,196 901 #E65418, 7.000%, due 8/1/10.................... 940 1,003 #G10457, 7.000%, due 2/1/11.................... 1,065 924 #E00436, 7.000%, due 6/1/11.................... 981 2,396 #E90630, 6.000%, due 7/1/12.................... 2,507 587 #G10708, 6.500%, due 8/1/12.................... 622 1,539 #E91999, 5.000%, due 10/1/12................... 1,568 372 #G11218, 7.000%, due 10/1/12................... 395 2,537 #E96147, 5.000%, due 5/1/13.................... 2,581 1,915 #E95846, 4.500%, due 5/1/13.................... 1,917 2,287 #G10839, 5.500%, due 10/1/13................... 2,352 2,310 #E72924, 7.000%, due 10/1/13................... 2,451 2,795 #E00639, 5.000%, due 3/1/14.................... 2,824 438 #E81908, 8.500%, due 12/1/15................... 469 1,707 #G90022, 8.000%, due 9/17/16................... 1,791 2,379 #G11486, 7.500%, due 4/1/17.................... 2,535 2,649 #E90398, 7.000%, due 5/1/17.................... 2,811 914 #M30028, 5.500%, due 5/1/17.................... 947 1,912 #G11549, 7.000%, due 7/1/17.................... 2,029 2,821 #G90027, 6.000%, due 11/15/17.................. 2,938 531 #C67537, 9.500%, due 8/1/21.................... 594 870 878 - ------- #G21, Tranche J, 6.250%, due 8/25/22........... ------ 48,126 50,652 - ------- Total FHLMC Mortgage Obligations............... ------ - ------- --------------------------------------------- ------ Principal Amount Value - ----------------------------------------------------- ------ Federal National Mortgage Association (FNMA)--19.3% $ 1,347 #545560, 8.000%, due 5/1/07.................. $1,416 1,163 #93-196, Tranche SA, 18.723%, due 10/25/08, VRN......................................... 1,363 520 #1993-221, Tranche SG, 12.992%, due 12/25/08, VRN......................................... 556 818 #765396, 5.500%, due 1/1/09.................. 845 1,633 #731691, 7.000%, due 9/1/09.................. 1,731 1,142 #695512, 8.000%, due 9/1/10.................. 1,217 2,273 #725479, 8.500%, due 10/1/10................. 2,443 3,393 #255056, 5.000%, due 11/1/10................. 3,440 6,600 6.250%, due 2/1/11........................... 7,086 1,181 #313816, 6.000%, due 4/1/11.................. 1,235 553 #577393, 10.000%, due 6/1/11................. 610 1,499 #577395, 10.000%, due 8/1/11................. 1,661 3,102 # 254705, 5.500%, due 3/1/13................. 3,218 1,260 #254788, 6.500%, due 4/1/13.................. 1,334 1,724 #725315, 8.000%, due 5/1/13.................. 1,843 692 #593561, 9.500%, due 8/1/14.................. 776 3,052 #567027, 7.000%, due 9/1/14.................. 3,243 3,529 #567026, 6.500%, due 10/1/14................. 3,736 1,144 #458124, 7.000%, due 12/15/14................ 1,199 1,443 #598453, 7.000%, due 6/1/15.................. 1,532 1,225 #555747, 8.000%, due 5/1/16.................. 1,310 698 #643217 , 6.500%, due 6/1/17................. 737 1,773 #682075, 5.500%, due 11/1/17................. 1,819 3,943 #662925, 6.000%, due 12/1/17................. 4,130 371 #1996-14, Tranche B, 3.801%, due 4/25/23..... 371 11 #1993-19, Tranche SH, 11.233%, due 4/25/23, VRN......................................... 14 1,711 #254797, 5.000%, due 6/1/23.................. 1,691 1,050 1,100 - ------- #733897, 6.500%, due 12/1/32................. ------ 48,850 51,656 - ------- Total FNMA Mortgage Obligations.............. ------ See accompanying Notes to Financial Statements. 42 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Income Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) NRSRO Principal Rating Amount (unaudited) Value - --------- ------------------------------- ----------- -------- Collateralized Mortgage Obligations--22.2% $ 2,500 Security National Mortgage Loan Trust, 2002-2, Tranche M2, 6.460%, due 8/25/08........... A+ $ 2,511 614 GRP 2004-1 3.960%, due 3/25/09....................... A 613 5,125 Condor Auto, 2003-A, Tranche B, 7.000%, due 12/15/09.......... A3 5,228 2,040 Countrywide Alternative Loan Trust, 2003-11T1, Tranche M, 4.750% due 7/25/18............ AA 1,968 1,818 Cityscape Home Equity Loan Trust, 1997-4, Tranche M2, 7.710%, due 10/25/18.......... A 1,816 1,900 ABFS, 2002-2, Tranche A6, 5.850%, due 3/15/19........... AAA 1,976 2,960 Security National Mortgage Loan Trust, 2001-2A, Tranche B, 8.100%, due 10/25/20...................... BBB 2,978 3,172 Countrywide, 2001-HLV1, Tranche B1, 9.385%, due 5/10/22................... BBB 3,275 244 First Plus, 1998-3, Tranche A7, 6.950%, due 10/10/22.......... AAA 244 1,216 First Plus, 1997-4, Tranche M2, 7.330%, due 9/11/23........... A 1,215 973 First Plus, 1997-4, Tranche A8, 7.310%, due 9/11/23........... AAA 972 712 First Plus, 1998-2, Tranche M2, 7.510%, due 5/10/24........... A2 711 208 First Plus, 1998-3, Tranche M2, 7.420%, due 5/10/24........... A2 209 2,144 Security National Mortgage Loan Trust, 2000-2, Tranche B, 9.510%, due 9/25/24........... A2 2,238 630 Security National Mortgage Loan Trust, 2001-2A, Tranche M, 8.100%, due 11/25/24...................... A 643 1,577 CIT Group Home Equity Loan Trust, 98-1 M2, 6.720%, due 9/15/27....................... A2 1,616 3,035 GMAC Mortgage Corporation Loan Trust, 2000-CL1, Tranche M, 8.720%, due 6/25/26....................... AA+ 3,109 4,425 Green Tree Home Improvement Loan Trust, 1998-E, Tranche HEM2, 7.270%, due 6/15/28....................... A+ 4,499 2,313 Delta Funding Home Equity Loan Trust, 2000-2, Tranche A6F, 7.970%, due 8/15/30........... AAA 2,264 2,700 Bear Stearns ABS, 2001-A, Tranche M1 7.540%, due 2/15/31....................... A 2,860 2,000 Countrywide, 2000-2, Tranche MF2, 9.000%, due 6/25/31....................... A 2,054 590 Countrywide, 2001-1, Tranche MF2, 7.511%, due 7/25/31....................... AA- 608 NRSRO Principal Rating Amount (unaudited) Value - --------- -------------------------------- ----------- -------- Collateralized Mortgage Obligations--(continued) $ 2,222 IMSA, 2001-5, Tranche M1 7.250%, due 8/25/31............ AA $ 2,297 4,635 Origin, 2001-A, Tranche A5, 7.080%, due 3/15/32............ Aaa 4,738 1,600 Security National Mortgage Loan Trust, 2004-1A, Tranche M2, 6.750%, due 06/25/32....................... A 1,590 1,164 Structured Assets Security Corporation, 2002-17, Tranche B3, 6.077%, due 9/25/32........................ BBB 1,135 943 GRP Real Estate Asset Trust, 2003-1, Tranche A, 5.970%, due 11/25/32................... A 942 2,934 LSSCO, 2004-2, Tranche M1, 5.177%, due 2/28/33............ AA 2,964 324 ABFS, 2002-2, Tranche A-7, 5.125%, 6/15/33................ AAA 332 1,500 ABFS, 2002-3, Tranche MI, 1,530 ------- 5.402%, 9/15/33................ AA -------- 58,218 Total Collateralized Mortgage 59,135 ------- Obligations.................... -------- Corporate Obligations--30.3% 3,499 Block Financial Corporation, 8.500%, due 4/15/07............ A 3,927 2,000 Mellon Bank NA, 7.375%, due 5/15/07........................ A+ 2,195 1,336 Ford Motor Credit, 7.200%, due 6/15/07........................ BBB 1,421 2,775 Applied Materials, Inc., 6.750%, due 10/15/07................... A- 3,039 1,000 Amgen Inc., 6.500%, due 12/01/07....................... A+ 1,090 2,550 DaimlerChrysler, NA Holdings, 4.750%, due 1/15/08............ A3 2,571 2,200 Lehman Brothers Holdings 4.000%, due 1/22/08............ A+ 2,196 1,650 Target Corporation, 3.375%, due 3/1/08............. A+ 1,623 2,350 Wells Fargo Company, 3.500%, due 4/4/08............. AA 2,316 2,225 Cardinal Health, Inc., 6.250%, due 7/15/08............ A 2,384 2,425 CIT Group Inc., 3.375%, due 4/1/09............. A 2,303 3,475 ConocoPhillips, Inc., 8.750%, due 5/25/10............ A- 4,200 2,300 Household Finance Corporation, 8.000%, due 7/15/10............ A 2,669 2,399 Boeing Capital Corporation, 7.375%, due 9/27/10............ A+ 2,713 2,500 Citigroup, Inc., 7.250%, due 10/1/10............ A+ 2,816 2,125 Comcast Cable Communications Corp., 6.750%, due 1/30/11........................ BBB 2,293 2,600 Sprint Capital Corp., 7.625%, due 1/30/11.................... BBB 2,874 See accompanying Notes to Financial Statements. June 30, 2004 William Blair Funds 43 - -------------------------------------------------------------------------------- Income Fund - -------------------------------------------------------------------------------- Portfolio of Investments, June 30, 2004 (all dollar amounts in thousands) (unaudited) NRSRO Principal Rating Amount (unaudited) Value - --------- ---------------------------- ----------- -------- Corporate Obligations--(continued) $ 2,600 Countrywide Financial Corp., 4.000%, due 3/22/11........ A $ 2,425 1,900 Time Warner, 6.750%, due 4/15/11.................... BBB+ 2,046 3,200 Morgan Stanley, 6.750%, due 4/15/11.................... A+ 3,507 3,000 General Motors Acceptance Corporation, 6.875%, due 9/15/11.................... BBB+ 3,076 1,500 Ford Motor Credit Co., Inc. 7.250%, due 10/25/11....... BBB+ 1,566 2,850 National Rural Utility Cooperative, 7.250%, due 3/1/12..................... A 3,236 2,500 Weyerhaeuser Company, 6.750%, due 3/15/12........ BBB 2,707 2,500 GE Capital Corporation, 6.000%, due 6/15/12........ AAA 2,638 2,000 SLM Corporation, 5.125%, due 8/27/12.................... A+ 1,976 2,550 Verizon Global Funding Corporation, 7.375%, due 9/1/12..................... A+ 2,868 - ---------- WAC = Weighted Average Coupon VRN = Variable Rate Note NRSRO = Nationally Recognized Statistical Rating Organization, such as S&P, Moody's or Fitch The obligations of certain U.S. Government-sponsored entities are neither issued nor guaranteed by the United States Treasury. NRSRO Principal Rating Amount (unaudited) Value - --------- ----------------------------- ----------- -------- Corporate Obligations--(continued) $ 2,360 Cox Communications Inc., 7.125%, due 10/1/12......... BBB $ 2,586 3,200 IBM Corporation, 4.750%, due 11/29/12.................... A+ 3,131 2,400 Kroger Company, 5.500%, due 2/1/13...................... BBB 2,393 1,900 Ohio Power Company, 5.500%, due 2/15/13................. A3 1,914 2,000 TXU Energy Company, 7.00%, 2,178 - -------- due 3/15/13................. BBB -------- 75,869 80,877 - -------- Total Corporate Obligations.. -------- 249,505 Total Long Term Investments--98.1% $262,271 - -------- (Cost $261,797)....................... -------- Short-Term Investments--0.9% 2,345 American Express Corporation, 2,345 - -------- VRN 1.170%, due 7/1/04...... A+ -------- 2,345 Total Short-Term Investments 2,345 - -------- (Cost $2,345)............. -------- $251,850 Total Investments--99.0% ======== (Cost $264,142)........... 264,616 Cash and other assets, less liabilities--1.0%...... 2,682 -------- Net Assets--100.0%........... $267,298 ======== See accompanying Notes to Financial Statements. 44 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Statements of Assets and Liabilities - -------------------------------------------------------------------------------- June 30, 2004 (all amounts in thousands) (unaudited) Tax- Small- Managed Large Cap Small Cap Mid Cap Growth Growth Growth Growth Growth Fund Fund Fund Fund Fund - - ----------- ------- --------- --------- ------- Assets Investments in securities, at cost...................................... $217,557 $ 4,545 $ 5,382 $528,779 $12,895 Investments in Affiliated Fund, at cost................................. 3,273 2 107 14,797 761 -------- ------- ------- -------- ------- Investments in securities, at value..................................... $271,021 $ 5,822 $ 6,161 $632,605 $13,568 Investments in Affiliated Fund, at value................................ 3,273 2 107 14,797 761 Cash.................................................................... -- -- -- 86 -- Receivable for fund shares sold......................................... 459 -- -- 327 148 Receivable for investment securities sold............................... -- -- -- 7,096 -- Receivable from Advisor................................................. -- 2 8 -- 33 Dividend and interest receivable........................................ 248 4 6 91 5 -------- ------- ------- -------- ------- Total assets..................................................... 275,001 5,830 6,282 655,002 14,515 Liabilities Payable for investment securities purchased............................. -- 94 -- 1,998 37 Payable for fund shares redeemed........................................ 94 -- -- 673 -- Management fee payable.................................................. 184 4 4 530 11 Distribution and shareholder services fee payable....................... 9 -- -- 177 1 Other accrued expenses.................................................. 101 12 10 121 30 -------- ------- ------- -------- ------- Total liabilities................................................ 388 110 14 3,499 79 -------- ------- ------- -------- ------- Net Assets...................................................... $274,613 $ 5,720 $ 6,268 $651,503 $14,436 ======== ======= ======= ======== ======= Capital Composition of Net Assets Par value of shares of beneficial interest............................ $ 27 $ 1 $ 1 $ 27 $ 1 Capital paid in excess of par value................................... 244,507 6,557 11,007 509,436 13,770 Accumulated net investment income (loss).............................. (454) (25) (11) (3,676) (50) Accumulated realized gain (loss)...................................... (22,931) (2,090) (5,508) 41,890 42 Net unrealized appreciation (depreciation) of investments and foreign currencies........................................................... 53,464 1,277 779 103,826 673 -------- ------- ------- -------- ------- Net Assets...................................................... $274,613 $ 5,720 $ 6,268 $651,503 $14,436 ======== ======= ======= ======== ======= Class A Shares Net Assets............................................................ $ 2 $ 2 $ 1 $ 5 $ 2 Shares Outstanding.................................................... 200 200 200 200 200 Maximum offering price reflecting 5.75% sales load.................... $ 10.57 $ 9.01 $ 6.23 $ 25.80 $ 11.28 Net Asset Value Per Share............................................. $ 9.96 $ 8.49 $ 5.87 $ 24.32 $ 10.63 Class B Shares Net Assets............................................................ $ 2 $ 2 $ 1 $ 5 $ 2 Shares Outstanding.................................................... 200 200 200 200 200 Net Asset Value Per Share............................................. $ 9.56 $ 8.20 $ 5.66 $ 23.47 $ 10.59 Class C Shares Net Assets............................................................ $ 2 $ 2 $ 1 $ 5 $ 2 Shares Outstanding.................................................... 200 200 200 200 200 Net Asset Value Per Share............................................. $ 9.55 $ 8.20 $ 5.65 $ 23.48 $ 10.59 See accompanying Notes to Financial Statements. June 30, 2004 William Blair Funds 45 - -------------------------------------------------------------------------------- Statements of Operations - -------------------------------------------------------------------------------- for the Period Ended June 30, 2004 (all dollar amounts in thousands) (unaudited) Small-Mid Cap Tax-Managed Large Cap Small Cap Growth Growth Fund Growth Fund Growth Fund Growth Fund Fund - - ----------- ----------- ----------- ----------- --------- Investment income Dividends.................................................... $ 905 $ 17 $ 24 $ 594 $ 14 Less foreign tax withheld.................................... (31) -- -- -- -- Interest..................................................... 6 -- -- -- -- ------- ----- ----- ------- ---- Total income............................................... 880 17 24 594 14 Expenses Investment advisory fees..................................... 1,025 25 24 3,182 45 Distribution fees............................................ 52 -- -- 462 4 Shareholder services fees.................................... -- -- -- -- -- Custodian fees............................................... 31 8 7 68 16 Transfer agent fees.......................................... 110 4 5 172 15 Professional fees............................................ 18 8 7 22 15 Registration fees............................................ 16 15 15 58 11 Other expenses............................................... 82 2 4 142 26 ------- ----- ----- ------- ---- Total expenses before waiver............................... 1,334 62 62 4,106 132 Plus expenses recovered by the advisor..................... -- -- -- 164 Less expenses waived or absorbed by the Advisor............ -- (20) (27) -- (68) ------- ----- ----- ------- ---- Net expenses............................................... 1,334 42 35 4,270 64 ------- ----- ----- ------- ---- Net investment income (loss)............................... (454) (25) (11) (3,676) (50) Net realized and unrealized gain (loss) on investments, foreign currency transactions and other assets and liabilities Net realized gain (loss) on investments.................... 8,810 256 137 39,748 42 ------- ----- ----- ------- ---- Change in net unrealized appreciation (depreciation) on investments and other assets and liabilities.................. (8,134) (171) (181) 26,349 694 ------- ----- ----- ------- ---- Net increase (decrease) in net assets resulting from operations $ 222 $ 60 $ (55) $62,421 $686 ======= ===== ===== ======= ==== See accompanying Notes to Financial Statements. 46 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Statements of Changes in Net Assets - -------------------------------------------------------------------------------- for the Period Ended June 30, 2004 and the Year Ended December 31, 2003 (all amounts in thousands) (unaudited) Tax- Managed Growth Growth Fund Fund - - ------------------ --------------- ------- 2004 2003 2004 2003 2004 - - -------- -------- ------- ------ ------ Operations Net investment income (loss)............................................... $ (454) $ (1,214) $ (25) $ (40) $ (11) Net realized gain (loss) on investments, foreign currency transactions and other assets and liabilities.............................................. 8,810 758 256 (483) 137 Change in net unrealized appreciation (depreciation) on investments, foreign currency transactions and other assets and liabilities............ (8,134) 58,056 (171) 1,777 (181) -------- -------- ------- ------ ------ Net increase (decrease) in net assets resulting from operations............ 222 57,600 60 1,254 (55) Distributions to shareholders from Net investment income...................................................... -- -- -- -- -- Net realized gain.......................................................... -- -- -- -- -- -------- -------- ------- ------ ------ -- -- -- -- -- Capital stock transactions Net proceeds from sale of shares........................................... 18,236 29,113 131 1,159 1,268 Shares issued in reinvestment of income dividends and capital gain distributions............................................................. -- -- -- -- -- Less cost of shares redeemed............................................... (25,499) (60,684) (1,342) (845) (464) -------- -------- ------- ------ ------ Net increase (decrease) in net assets resulting from capital share transactions.............................................................. (7,263) (31,571) (1,211) 314 804 -------- -------- ------- ------ ------ Increase (decrease) in net assets.......................................... (7,041) 26,029 (1,151) 1,568 749 Net assets Beginning of period........................................................ 281,654 255,625 6,871 5,303 5,519 -------- -------- ------- ------ ------ End of period.............................................................. $274,613 $281,654 $ 5,720 $6,871 $6,268 ======== ======== ======= ====== ====== Undistributed net investment income (loss) at the end of the period.......... $ (454) $ -- $ (25) $ -- $ (11) ======== ======== ======= ====== ====== Large Cap Small Cap Small-Mid Cap Growth Growth Growth Fund Fund Fund - - -------- ------------------ --------------- 2003 2004 2003 2004 2003(a) - - ------- -------- -------- ------- ------- Operations Net investment income (loss)............................................... $ (26) $ (3,676) $ (2,137) $ (50) $ -- Net realized gain (loss) on investments, foreign currency transactions and other assets and liabilities.............................................. (553) 39,748 20,759 42 -- Change in net unrealized appreciation (depreciation) on investments, foreign currency transactions and other assets and liabilities............ 1,644 26,349 75,261 694 (21) ------- -------- -------- ------- ------ Net increase (decrease) in net assets resulting from operations............ 1,065 62,421 93,883 686 (21) Distributions to shareholders from Net investment income...................................................... -- -- -- -- -- Net realized gain.......................................................... -- -- (7,443) -- -- ------- -------- -------- ------- ------ -- -- (7,443) -- -- Capital stock transactions Net proceeds from sale of shares........................................... 1,147 140,340 400,134 10,165 3,694 Shares issued in reinvestment of income dividends and capital gain distributions............................................................. -- -- 7,200 -- -- Less cost of shares redeemed............................................... (2,162) (70,082) (53,530) (88) -- ------- -------- -------- ------- ------ Net increase (decrease) in net assets resulting from capital share transactions.............................................................. (1,015) 70,258 353,804 10,077 3,694 ------- -------- -------- ------- ------ Increase (decrease) in net assets.......................................... 50 132,679 440,243 10,763 3,673 Net assets Beginning of period........................................................ 5,469 518,824 78,581 3,673 -- ------- -------- -------- ------- ------ End of period.............................................................. $ 5,519 $651,503 $518,824 $14,436 $3,673 ======= ======== ======== ======= ====== Undistributed net investment income (loss) at the end of the period.......... $ -- $ (3,676) $ -- $ (50) $ -- ======= ======== ======== ======= ====== - ---------- (a)For the period from December 29, 2003 (Commencement of Operations) to December 31, 2003. See accompanying Notes to Financial Statements. June 30, 2004 William Blair Funds 47 - -------------------------------------------------------------------------------- Statements of Assets and Liabilities - -------------------------------------------------------------------------------- June 30, 2004 (all dollar amounts in thousands) (unaudited) International International Value Growth Equity Discovery Fund Fund Fund - - ------------- ------------- --------- Assets Investments in securities, at cost................................................. $2,061,736 $2,957 $205,852 Investments in Affiliated Fund, at cost............................................ 23,483 336 2,172 ---------- ------ -------- Investments in securities, at value................................................ $2,486,303 $3,139 $262,879 Investments in Affiliated Fund, at value........................................... 23,483 336 2,172 Cash............................................................................... -- -- -- Foreign currency, at value (cost $714 )............................................ 697 -- -- Receivable for fund shares sold.................................................... 14,034 -- 20 Receivable for investment securities sold.......................................... 40,933 -- 2,773 Receivable from Advisor............................................................ -- 11 23 Dividend and interest receivable................................................... 2,388 1 194 ---------- ------ -------- Total assets................................................................ 2,567,838 3,487 268,061 Liabilities Payable for investment securities purchased........................................ 27,349 -- 4,403 Payable for fund shares redeemed................................................... 1,309 -- 67 Management fee payable............................................................. 2,054 3 234 Distribution and shareholder services fee payable.................................. 357 -- 34 Dividend payable................................................................... -- -- -- Other accrued expenses............................................................. 451 10 109 ---------- ------ -------- Total liabilities........................................................... 31,520 13 4,847 ---------- ------ -------- Net Assets................................................................. $2,536,318 $3,474 $263,214 ========== ====== ======== Capital Composition of Net Assets Par value of shares of beneficial interest....................................... $ 132 $ -- $ 11 Capital paid in excess of par value.............................................. 2,170,553 3,299 185,109 Accumulated net investment income (loss)......................................... (244) (1) 149 Accumulated realized gain (loss)................................................. (58,675) (6) 20,918 Net unrealized appreciation (depreciation) of investments and foreign currencies. 424,552 182 57,027 ---------- ------ -------- Net Assets................................................................. $2,536,318 $3,474 $263,214 ========== ====== ======== Class A Shares Net Assets....................................................................... $ 4 $ 2 $ 5 Shares Outstanding............................................................... 200 200 200 Maximum offering price reflecting 5.75% sales load for equity funds, and 2% for Income Fund..................................................................... $ 20.36 $11.19 $ 24.14 Net Asset Value Per Share........................................................ $ 19.19 $10.55 $ 22.75 Class B Shares Net Assets....................................................................... $ 3 $ 2 $ 5 Shares Outstanding............................................................... 200 200 200 Net Asset Value Per Share........................................................ $ 18.29 $10.55 $ 23.26 Class C Shares Net Assets....................................................................... $ 3 $ 2 5 Shares Outstanding............................................................... 200 200 200 Net Asset Value Per Share........................................................ $ 18.29 $10.55 $ 23.27 Income Fund - - -------- Assets Investments in securities, at cost................................................. $264,142 Investments in Affiliated Fund, at cost............................................ -- -------- Investments in securities, at value................................................ $264,616 Investments in Affiliated Fund, at value........................................... -- Cash............................................................................... 81 Foreign currency, at value (cost $714 )............................................ -- Receivable for fund shares sold.................................................... 203 Receivable for investment securities sold.......................................... -- Receivable from Advisor............................................................ -- Dividend and interest receivable................................................... 2,630 -------- Total assets................................................................ 267,530 Liabilities Payable for investment securities purchased........................................ -- Payable for fund shares redeemed................................................... 66 Management fee payable............................................................. 112 Distribution and shareholder services fee payable.................................. 7 Dividend payable................................................................... -- Other accrued expenses............................................................. 47 -------- Total liabilities........................................................... 232 -------- Net Assets................................................................. $267,298 ======== Capital Composition of Net Assets Par value of shares of beneficial interest....................................... $ 27 Capital paid in excess of par value.............................................. 280,237 Accumulated net investment income (loss)......................................... (538) Accumulated realized gain (loss)................................................. (12,902) Net unrealized appreciation (depreciation) of investments and foreign currencies. 474 -------- Net Assets................................................................. $267,298 ======== Class A Shares Net Assets....................................................................... $ 1 Shares Outstanding............................................................... 200 Maximum offering price reflecting 5.75% sales load for equity funds, and 2% for Income Fund..................................................................... $ 6.18 Net Asset Value Per Share........................................................ $ 6.06 Class B Shares Net Assets....................................................................... $ 2 Shares Outstanding............................................................... 200 Net Asset Value Per Share........................................................ $ 10.00 Class C Shares Net Assets....................................................................... $ 2 Shares Outstanding............................................................... 200 Net Asset Value Per Share........................................................ $ 10.15 See accompanying Notes to Financial Statements. 48 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Statements of Operations - -------------------------------------------------------------------------------- for the Period Ended June 30, 2004 (all dollar amounts in thousands) (unaudited) International International Value Growth Equity Discovery Fund Fund Fund - - ------------- ------------- --------- Investment income Dividends.......................................................................... $ 20,796 $ 2 $ 1,643 Less foreign tax withheld.......................................................... (2,204) -- -- Interest........................................................................... 192 1 73 -------- ---- ------- Total income..................................................................... 18,784 3 1,716 Expenses Investment advisory fees........................................................... 11,347 3 1,410 Distribution fees.................................................................. 2,054 -- 37 Shareholder services fees.......................................................... -- -- -- Custodian fees..................................................................... 1,045 4 42 Transfer agent fees................................................................ 865 1 66 Professional fees.................................................................. 65 2 16 Registration fees.................................................................. 87 4 10 Other expenses..................................................................... 519 1 9 -------- ---- ------- Total expenses before waiver..................................................... 15,982 15 1,590 Less expenses repaid to (waived and absorbed by) the Advisor..................... -- (11) (23) -------- ---- ------- Net expenses..................................................................... 15,982 4 1,567 -------- ---- ------- Net investment income (loss)..................................................... 2,802 (1) 149 Net realized and unrealized gain (loss) on investments, foreign currency transactions and other assets and liabilities Net realized gain (loss) on investments.......................................... 76,358 (2) 16,473 Net realized gain (loss) on foreign currency transactions and other assets and liabilities..................................................................... (7,519) (4) -- -------- ---- ------- Total net realized gain (loss)................................................... 68,839 (6) 16,473 Change in net unrealized appreciation (depreciation) on investments and other assets and liabilities..................................................................... (13,963) 182 (4,102) -------- ---- ------- Net increase (decrease) in net assets resulting from operations...................... $ 57,678 $175 $12,520 ======== ==== ======= Income Fund - - ------- Investment income Dividends.......................................................................... $ -- Less foreign tax withheld.......................................................... -- Interest........................................................................... 6,618 ------- Total income..................................................................... 6,618 Expenses Investment advisory fees........................................................... 658 Distribution fees.................................................................. 40 Shareholder services fees.......................................................... -- Custodian fees..................................................................... 37 Transfer agent fees................................................................ 49 Professional fees.................................................................. 15 Registration fees.................................................................. 24 Other expenses..................................................................... 36 ------- Total expenses before waiver..................................................... 859 Less expenses repaid to (waived and absorbed by) the Advisor..................... -- ------- Net expenses..................................................................... 859 ------- Net investment income (loss)..................................................... 5,759 Net realized and unrealized gain (loss) on investments, foreign currency transactions and other assets and liabilities Net realized gain (loss) on investments.......................................... (2,404) Net realized gain (loss) on foreign currency transactions and other assets and liabilities..................................................................... -- ------- Total net realized gain (loss)................................................... (2,404) Change in net unrealized appreciation (depreciation) on investments and other assets and liabilities..................................................................... (4,409) ------- Net increase (decrease) in net assets resulting from operations...................... $(1,054) ======= See accompanying Notes to Financial Statements. June 30, 2004 William Blair Funds 49 - -------------------------------------------------------------------------------- Statements of Changes in Net Assets - -------------------------------------------------------------------------------- for the Period Ended June 30, 2004 and the Year Ended December 31, 2003 (all amounts in thousands) (unaudited) International Growth Fund - - ---------------------- 2004 2003 - - ---------- ---------- Operations Net investment income (loss)................................................................ $ 2,802 $ 1,037 Net realized gain (loss) on investments, foreign currency transactions and other assets and liabilities................................................................................ 68,839 (14,894) Change in net unrealized appreciation (depreciation) on investments, foreign currency transactions and other assets and liabilities.............................................. (13,963) 459,102 ---------- ---------- Net increase (decrease) in net assets resulting from operations............................. 57,678 445,245 Distributions to shareholders from Net investment income....................................................................... -- (2,775) Net realized gain........................................................................... -- -- ---------- ---------- -- (2,775) Capital stock transactions Net proceeds from sale of shares............................................................ 775,248 1,012,995 Shares issued in reinvestment of income dividends and capital gain distributions............ -- 2,457 Less cost of shares redeemed................................................................ (196,307) (337,011) ---------- ---------- Net increase (decrease) in net assets resulting from capital stock transactions............. 578,941 678,441 ---------- ---------- Increase (decrease) in net assets........................................................... 636,619 1,120,911 Net assets Beginning of period......................................................................... 1,899,699 778,788 ---------- ---------- End of period............................................................................... $2,536,318 $1,899,699 ========== ========== Undistributed net investment income (loss) at the end of the period........................... $ (244) $ (3,046) ========== ========== International Value Equity Discovery Fund Fund - - ------------- ------------------ 2004(a) 2004 2003 - - ------------- -------- -------- Operations Net investment income (loss)................................................................ $ (1) $ 149 $ (310) Net realized gain (loss) on investments, foreign currency transactions and other assets and liabilities................................................................................ (6) 16,473 6,425 Change in net unrealized appreciation (depreciation) on investments, foreign currency transactions and other assets and liabilities.............................................. 182 (4,102) 60,586 ------ -------- -------- Net increase (decrease) in net assets resulting from operations............................. 175 12,520 66,701 Distributions to shareholders from Net investment income....................................................................... -- -- -- Net realized gain........................................................................... -- -- -- ------ -------- -------- -- -- -- Capital stock transactions Net proceeds from sale of shares............................................................ 3,299 43,068 53,181 Shares issued in reinvestment of income dividends and capital gain distributions............ -- -- -- Less cost of shares redeemed................................................................ -- (29,485) (73,573) ------ -------- -------- Net increase (decrease) in net assets resulting from capital stock transactions............. 3,299 13,583 (20,392) ------ -------- -------- Increase (decrease) in net assets........................................................... 3,474 26,103 46,309 Net assets Beginning of period......................................................................... -- 237,111 190,802 ------ -------- -------- End of period............................................................................... $3,474 $263,214 $237,111 ====== ======== ======== Undistributed net investment income (loss) at the end of the period........................... $ (1) $ 149 $ -- ====== ======== ======== Income Fund - - ------------------ 2004 2003 - - -------- -------- Operations Net investment income (loss)................................................................ $ 5,759 $ 10,144 Net realized gain (loss) on investments, foreign currency transactions and other assets and liabilities................................................................................ (2,404) 865 Change in net unrealized appreciation (depreciation) on investments, foreign currency transactions and other assets and liabilities.............................................. (4,409) (2,342) -------- -------- Net increase (decrease) in net assets resulting from operations............................. (1,054) 8,667 Distributions to shareholders from Net investment income....................................................................... (6,425) (13,802) Net realized gain........................................................................... -- -- -------- -------- (6,425) (13,802) Capital stock transactions Net proceeds from sale of shares............................................................ 38,997 139,094 Shares issued in reinvestment of income dividends and capital gain distributions............ 4,561 10,207 Less cost of shares redeemed................................................................ (33,843) (75,240) -------- -------- Net increase (decrease) in net assets resulting from capital stock transactions............. 9,715 74,061 -------- -------- Increase (decrease) in net assets........................................................... 2,236 68,926 Net assets Beginning of period......................................................................... 265,062 196,136 -------- -------- End of period............................................................................... $267,298 $265,062 ======== ======== Undistributed net investment income (loss) at the end of the period........................... $ (538) $ 128 ======== ======== - ---------- (a)For the period from May 24, 2004 (Commencement of Operations) to June 30, 2004. See accompanying Notes to Financial Statements. 50 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Notes to Financial Statements - -------------------------------------------------------------------------------- (1) Significant Accounting Policies (a) Description of the Fund William Blair Funds (the "Fund") is a diversified mutual fund registered under the Investment Company Act of 1940, as amended, as an open-end management investment company. For each Portfolio the number of shares authorized is unlimited. The Fund currently consists of the following twelve portfolios (the "Portfolios"), each with its own investment objectives and policies. Equity Portfolios International Portfolios - ----------------- ------------------------ Growth International Growth Tax-Managed Growth International Equity Large Cap Growth Institutional International Growth Small Cap Growth Institutional International Equity Small-Mid Cap Growth Fixed Income Portfolio ---------------------- Value Discovery Income Money Market Portfolio ---------------------- Ready Reserves The investment objectives of the Portfolios are as follows: Equity....... Long-term capital appreciation. International Long-term capital appreciation. Fixed Income. High level of current income with relative stability of principal. Money Market. Current income, a stable share price and daily liquidity. The Institutional International Growth Fund issues a separate report. The Ready Reserves Fund which only offers Class N shares issues a separate report. The Institutional International Equity Fund has not commenced operations as of the date of this report. (b) Share Classes Five different classes of shares currently exist. These share classes were offered for sale from November 2, 1999 until May 25, 2001. Currently, William Blair and Company, L.L.C., is the only shareholder in Class A, Class B, and Class C. All of the remaining shareholders in these classes exchanged their shares to Class N shares of their respective portfolio as of May 25, 2001. The table below describes the Class A shares, Class B shares and Class C shares covered by this report: Class Description - ----- ----------- A Class A shares are sold to investors subject to an initial sales charge (maximum amount 5.75% for equity, and international funds, 2.0% for fixed income portfolio) and is subject to ongoing shareholder service fees of 0.25% of average daily net assets of Class A. B Class B shares are sold without an initial sales charge but are subject to higher ongoing expenses than Class A shares in the form of shareholder service fees of 0.25% and distribution fees under a Rule 12b-1 plan of 0.75% of average daily net assets of Class B and a contingent deferred sales charge payable upon certain redemptions. Class B shares automatically convert to Class A shares seven years after issuance (three years for the Income Portfolio). C Class C shares are sold without an initial sales charge but are subject to higher ongoing expenses than Class A shares in the form of shareholder service fees of 0.25% and distribution fees under a Rule 12b-1 plan of 0.75% of average daily net assets of Class B and a contingent deferred sales charge payable upon certain redemptions within one year of purchase. Investment income, realized and unrealized gains and losses, and certain portfolio level expenses and expense reductions, if any, are allocated based on the relative net assets of each class, except for certain class specific expenses which are charged directly to the appropriate class. Differences in class expenses may result in the payment of different per share dividends by class. All share classes of the Portfolios have equal rights with respect to voting subject to class specific arrangements. June 30, 2004 William Blair Funds 51 (c) Investment Valuation The market value of domestic equity securities and options is determined by valuing securities traded on national securities exchanges or markets or in the over-the-counter markets at the last sales price or, if applicable, the official closing price or, in the absence of a sale on the date of valuation, at the latest bid price. From January 1, 2003 until November 24, 2003, the value of foreign securities was determined based upon the last sale price on the foreign exchange or market on which it is primarily traded or, if there had been no sale on the date of valuation, at the latest bid price. The Board of Trustees approved amendments to the Fund's valuation procedures in October 2003 relating to the manner in which the Funds' foreign securities are valued. This change was implemented November 24, 2003. To reflect this change, if the foreign exchange or market on which a security is primarily traded closes before the close of regular trading on the New York Stock Exchange (4:00 p.m. Eastern time), the Funds use an independent pricing service on a daily basis to estimate the fair value price as of the close of regular trading on the New York Stock Exchange. Otherwise, the value of foreign equity securities is determined based on the last sale price on the foreign exchange or market on which it is primarily traded or, if there have been no sales during that day, at the latest bid price. Foreign currency forward contracts and foreign currencies are valued at the forward and current exchange rates, respectively, prevailing on the date of valuation. Long-term, fixed income securities are valued based on market quotations, or by independent pricing services that use prices provided by market makers or by estimates of market values obtained from yield data relating to instruments or securities with similar characteristics. Investments in other funds are valued at the underlying fund's net asset value on the date of valuation. Other securities, and all other assets, including securities for which a market price is not available, or the value of which is affected by a significant valuation event, are valued at fair value as determined in good faith by, or under the direction of the Board of Trustees and in accordance with the Fund's valuation procedures. As of June 30, 2004, there were securities held in Small Cap Growth, Value Discovery, International Growth and International Equity Portfolios requiring fair valuation pursuant to the Fund's valuation procedures. (d) Investment income and investment transactions Dividend income is recorded on the ex-dividend date, except for those dividends from certain foreign securities which are recorded as soon as the information is available. Premiums and discounts are accreted and amortized on a straight-line basis for short-term investments and on an effective interest method for long-term investments. Interest income is determined on the basis of the interest accrued, adjusted for amortization of premium or discount. Variable rate bonds and floating rate notes earn interest at coupon rates that fluctuate at specific time intervals. The interest rates shown in the Portfolio of Investments for the Income Portfolio were the rates in effect on June 30, 2004. Put bonds may be redeemed at the discretion of the holder on specified dates prior to maturity. The Portfolios utilize the straight-line method of amortization of premiums and discounts for short-term securities (maturities less than one year) and the effective interest method for long-term securities (maturities greater than one year). Paydown gains and losses on mortgage and asset-backed securities are treated as an adjustment to interest income. For the period ended June 30, 2004, the Income Portfolio recognized a reduction in interest income and a reduction in net realized loss of $1,290 (in thousands). For the years ended December 31, 2003 and 2002, the Income Portfolio recognized a reduction in interest income and reduction in net realized loss of $2,691 and $948 (in thousands), respectively. This reclassification has no effect on the net asset value of the Portfolio. Securities transactions are recorded on the trade date. Realized gains and losses from securities transactions are reported on an high cost basis. (e) Share Valuation and Dividends to Shareholders Shares are sold and redeemed on a continuous basis at net asset value. The net asset value per share is determined separately for each class by dividing the Portfolio's net assets attributable to that class by the number of shares of the class outstanding as of the close of regular trading on the New York Stock Exchange, which is generally 3:00 p.m. Central time (4:00 p.m. Eastern time), on each day the Exchange is open. 52 Semi-Annual Report June 30, 2004 Dividends from net investment income, if any, of the Growth, Tax-Managed Growth, Large Cap Growth, Small Cap Growth, Small-Mid Cap Growth, International Growth, International Equity and Value Discovery Portfolios are declared at least annually. Dividends from the Income Portfolio are declared monthly. Capital gain distributions, if any, are declared at least annually in December. Dividends payable to shareholders are recorded on the ex-dividend date. The timing and characterization of certain income and capital gain distributions are determined annually in accordance with Federal income tax regulations that may differ from accounting principles generally accepted in the United States. As a result, net investment income or loss and net realized gain or loss for a reporting period may differ from the amount distributed during such period. In addition, the Portfolios may periodically record reclassifications among certain capital accounts to reflect differences between financial reporting and income tax basis distributions. The reclassifications were reported in order to reflect the tax treatment for certain permanent differences that exist between income tax regulations and accounting principles generally accepted in the United States. The reclassifications relate to net operating losses, Section 988 currency gains and losses, mortgage paydown securities gains and losses associated with securities issued before June 8, 1997, and recharacterization of dividends received from investments in REITs. These reclassifications have no impact on the net asset values of the Portfolios. Accordingly, at December 31, 2003, the following reclassifications were recorded (in thousands): Accumulated Undistributed Capital Undistributed Net Net Realized Paid In Excess Portfolio Investment Income/(Loss) Gain/ (Loss) of Par Value --------- ------------------------ ------------ ------------ Growth.............. $1,214 $ (54) $(1,160) Tax-Managed Growth.. 40 -- (40) Large Cap Growth.... 26 -- (26) Small Cap Growth.... 2,137 (2,137) -- Small-Mid Cap Growth -- -- -- International Growth (860) 860 -- Value Discovery..... 310 170 (480) Income.............. 2,683 (2,686) 3 Distributions from net realized gains for book purposes may include short-term capital gains, which are included as ordinary income for tax purposes. The tax character of distributions in 2004, will be determined at the close of the fiscal year in December. The tax character of distributions paid during 2003 and 2002 was as follows (in thousands): Distributions Paid In 2003 Distributions Paid In 2002 - -------------------------- -------------------------- Ordinary Long-Term Ordinary Long-Term Portfolio Income Capital Gains Income Capital Gains --------- ------ ------------- ------ ------------- Growth.............. $ -- $ -- $ -- $-- Tax-Managed Growth.. -- -- -- -- Large Cap Growth.... -- -- -- -- Small Cap Growth.... 1,139 6,304 -- -- Small-Mid Cap Growth -- -- -- -- International Growth 2,775 -- -- -- Value Discovery..... -- -- -- -- Income.............. 13,802 -- 9,411 -- As of December 31, 2003, the components of distributable earnings on a tax basis were as follows (in thousands): Net Undistributed Accumulated Undistributed Unrealized Ordinary Capital and Long-Term Appreciation / Portfolio Income Other Losses Gain (Depreciation) --------- ------ ------------ ---- -------------- Growth.............. $ -- $ 29,466 $ -- $ 59,304 Tax-Managed Growth.. -- 2,331 -- 1,433 Large Cap Growth.... -- 5,592 -- 907 Small Cap Growth.... 2,198 -- 985 76,436 Small-Mid Cap Growth -- -- -- (21) International Growth 2,615 126,136 -- 431,476 Value Discovery..... -- -- 5,515 60,059 Income.............. 133 10,401 -- 4,780 June 30, 2004 William Blair Funds 53 (f) Options The Portfolios may engage in options transactions on security indices and other financial indices and in doing so achieve similar objectives to what they would achieve through the sale or purchase of options on individual securities or other instruments. Option writing. When the Portfolio writes an option, an amount equal to the premium received by the Portfolio is recorded as a liability and is subsequently adjusted to the current fair value of the option written. Premiums received from writing options that expire unexercised are treated by the Portfolio on the expiration date as realized gains from investments. The difference between the premium and the amount paid on effecting a closing purchase transaction, including brokerage commissions, is also treated as a realized gain, or, if the premium is less than the amount paid for the closing purchase transaction, as a realized loss. If a call option is exercised, the premium is added to the proceeds from the sale of the underlying security or currency in determining whether the Portfolio has realized a gain or loss. If a put option is exercised, the premium reduces the cost basis of the securities purchased by the Portfolio. The Portfolio as writer of an option bears the market risk of an unfavorable change in the price of the security underlying the written option. There were no open options at June 30, 2004. (g) Foreign Currency Translation and Foreign Currency Forward Contracts The International Growth and International Equity Portfolios may invest in securities denominated in foreign currencies. As such, assets and liabilities denominated in foreign currencies are translated into U.S. dollar amounts at the current exchange rate on the date of valuation. These Portfolios may enter into foreign currency forward contracts (1) as a means of managing the risks associated with changes in the exchange rates for the purchase or sale of a specific amount of a particular foreign currency, and (2) to hedge the value, in U.S. dollars, of portfolio securities. Gains and losses from foreign currency transactions associated with purchases and sales of investments and foreign currency forward contracts are included with the net realized and unrealized gain or loss on investments. (h) Income Taxes Each Portfolio intends to comply with the special provisions of the Internal Revenue Code available to regulated investment companies and, therefore, no provision for Federal income taxes has been made in the accompanying financial statements since each Portfolio intends to distribute substantially all of its taxable income to its shareholders and be relieved of all Federal income taxes. The cost of investments for Federal income tax purposes and related gross unrealized appreciation/(depreciation) and net unrealized appreciation/(depreciation) at June 30, 2004, were as follows (in thousands): Net Gross Gross Unrealized Cost of Unrealized Unrealized Appreciation / Portfolio Investments Appreciation Depreciation (Depreciation) --------- ----------- ------------ ------------ -------------- Growth.............. $ 223,124 $ 65,321 $14,151 $ 51,170 Tax-Managed Growth.. 4,562 1,422 160 1,262 Large Cap Growth.... 5,514 985 231 754 Small Cap Growth.... 544,008 123,085 19,691 103,394 Small-Mid Cap Growth 13,655 1,162 488 674 International Growth 2,089,257 465,076 44,546 420,530 International Equity 3,293 190 8 182 Value Discovery..... 209,045 62,598 6,592 56,006 Income.............. 264,245 4,137 3,766 371 At December 31, 2003, the following Portfolios have unused capital loss carryforwards available for Federal income tax purposes to be applied against future capital gains, if any. If not applied, the carryforwards will expire as follows (in thousands): Portfolio 2004 2005 2006 2007 2008 2009 2010 2011 Total - --------- ---- ---- ---- ---- ---- ---- ---- ---- ----- Growth.............. $ -- $ -- $ -- $ -- $ -- $ 4,332 $23,082 $ 2,032 $ 29,446 Tax-Managed Growth.. -- -- -- -- 94 732 1,037 468 2,331 Large Cap Growth.... -- -- -- -- 493 2,714 1,582 769 5,558 Small Cap Growth.... -- -- -- -- -- -- -- -- -- Small-Mid Cap Growth -- -- -- -- -- -- -- -- -- International Growth -- -- -- -- -- 31,564 59,888 34,482 125,934 Value Discovery..... -- -- -- -- -- -- -- -- -- Income.............. 2,156 -- -- 1,249 3,292 -- 1,692 1,582 9,971 54 Semi-Annual Report June 30, 2004 The International Growth Portfolio has elected to mark-to-market its investments in Passive Foreign Investment Companies ("PFICs") for Federal income tax purposes. In accordance with this election, the Portfolio recognized net unrealized appreciation (depreciation) of $4,938 (in thousands) in 2003, all of which has been reclassified from unrealized gain (loss) on investments to undistributed net investment income. For the period November 1, 2003 through December 31, 2003, the following Portfolios incurred net realized capital or foreign currency losses. Each Portfolio intends to treat this loss as having occurred in fiscal year 2004 for Federal income tax purposes (in thousands): Portfolio Amount --------- ------ Growth.............. $ -- Tax-Managed Growth.. -- Large Cap Growth.... 34 Small Cap Growth.... -- Small-Mid Cap Growth -- International Growth 202 Value Discovery..... -- Income.............. 430 (i) Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the financial statements. Actual results may differ from those estimates. (2) Transactions with Affiliates (a) Management and Expense Limitation Agreements Each Portfolio has a management agreement with William Blair & Company L.L.C. (the "Company") for investment advisory, administrative, and other accounting services. Each Portfolio pays the Company an annual fee, payable monthly, based on a specified percentage of its average daily net assets. A summary of the annual rates expressed as a percentage of average daily net assets is as follows: Equity Portfolios International Portfolios - ----------------- ------------------------ Growth......................................... 0.75% International Growth and International Equity Tax-Managed Growth............................. 0.80% First $250 million......................... 1.10% Large Cap Growth............................... 0.80% In excess of $250 million.................. 1.00% Small Cap Growth............................... 1.10% Small-Mid Cap Growth........................... 1.00% Value Discovery................................ 1.15% Fixed Income Portfolio - ---------------------- - Income* First $250 million............................ 0.25% In excess of $250 million..................... 0.20% - ---------- *Management fee also includes a charge of 5% of gross income. Some of the Portfolios have also entered into Expense Limitation Agreements with the Company. Under the terms of these Agreements, the Company has agreed to waive its advisory fees and absorb other operating expenses through April 30, 2005, if total expenses for each class of the following Portfolios exceed the following rates (as a percentage of average daily net assets): Class A Shares Class B & C Shares - ------------------------- ------------------------- Through Effective Through Effective April 30, 2004 May 1, 2004 April 30, 2004 May 1, 2004 - -------------- ----------- -------------- ----------- Tax-Managed Growth.. 1.55% 1.54% 2.30% 2.29% Large Cap Growth.... 1.45% 1.34% 2.20% 2.09% Small Cap Growth.... 1.63% 1.65% 2.38% 2.40% Small-Mid Cap Growth 1.54% 1.54% 2.29% 2.29% International Equity N/A 1.50% N/A 2.25% Value Discovery..... 1.58% 1.50% 2.33% 2.25% June 30, 2004 William Blair Funds 55 For a period of five years subsequent to the Commencement of Operations of each Fund, the Company is entitled to reimbursement from the Tax-Managed Growth, Large Cap Growth, and Small Cap Growth Portfolios for previously waived fees and expenses to the extent the overall expense ratio remains below the percentages indicated. As a result, the total expense ratio for the Portfolios during the period the agreement is in effect, will not fall below the percentages indicated. The total amount available for recapture at June 30, 2004 is $433 (in thousands) for Tax-Managed Growth, $415 (in thousands) for Large Cap Growth, and $0 for Small Cap Growth. The Small Cap Growth Portfolio reimbursed the Advisor $164,000, for the period ended June 30, 2004 and $186,000 for the year ended December 31, 2003. For a period of three years subsequent to the Commencement of Operations of the Small-Mid Cap Growth and the International Equity Portfolios, the Company is entitled to reimbursement for previously waived fees and expenses to the extent the overall expense ratio remains below the percentages indicated. The total amount available for recapture at June 30, 2004 is $68 (in thousands) for the Small-Mid Cap Growth Portfolio and $11 for the International Equity Portfolio. For the period ended June 30, 2004, the investment advisory fees incurred by the Portfolios and related fee waivers were as follows (in thousands): Expenses Recovered or Gross Fee Net (Absorbed) Portfolio Advisory Fee Waiver Advisory Fee by Advisor --------- ------------ ------ ------------ ---------- Growth.............. $ 1,025 $-- $ 1,025 $ -- Tax-Managed Growth.. 25 20 5 -- Large Cap Growth.... 24 24 -- 3 Small Cap Growth.... 3,182 -- 3,182 (164) Small-Mid Cap Growth 45 45 -- 23 International Growth 11,347 -- 11,347 -- International Equity 3 3 -- 8 Value Discovery..... 1,410 -- 1,410 -- Income.............. 658 -- 658 -- (b) Underwriting, Distribution Services and Service Agreement Each Portfolio has a Distribution Agreement and a Shareholder Services Agreement with the Company for distribution and account services. Each Portfolio pays the Company an annual fee, payable monthly, based on a specified percentage of its average daily net assets of specified share classes. The annual rates for Distribution fees expressed as a percentage of average daily net assets for Class B and Class C is 0.75%. The annual rate for shareholder services fees expressed as a percentage of average daily net assets for Class A, Class B and Class C is 0.25%. Distribution and shareholder services fees incurred by Class A, Class B and Class C of the Portfolios to the Company, for the period ended June 30, 2004, were as follows: Distribution Shareholder Portfolio Fees Service Fee --------- ------------ ----------- Growth.............. $ 6 $14 Tax-Managed Growth.. 6 12 Large Cap Growth.... 5 8 Small Cap Growth.... 17 34 Small-Mid Cap Growth 6 14 International Growth 14 28 International Equity 1 3 Value Discovery..... 17 34 Income.............. 5 14 (c) Trustees Fees The Portfolios incurred fees of $129 (in thousands) to non-interested trustees of the Fund for the period ended June 30, 2004. Interested trustees are not compensated. 56 Semi-Annual Report June 30, 2004 (d) Investments in Affiliated Portfolio Pursuant to an Exemptive Order granted by the Securities and Exchange Commission in January, 2001, each of the Portfolios of the Fund may invest in the William Blair Ready Reserves Portfolio ("Ready Reserves"), an open-end money market portfolio managed by the Advisor. Ready Reserves Portfolio is used as a cash management option to the other Portfolios in the Fund. The Advisor waives management fees and shareholder service fees earned from the other Portfolios investment in the Ready Reserves Fund. The fees waived with respect to each Portfolio for the period ended June 30, 2004 are listed below. Distributions received from Ready Reserves are reflected as dividend income in each Portfolio's statement of operations. Amounts relating to the Portfolios' investments in Ready Reserves were as follows for the period ended June 30, 2004 (in thousands): Percent Sales Fees Dividend of Net Portfolio Purchases Proceeds Waived Income Value Assets --------- --------- -------- ------ -------- ------- ------- Growth.............. $ 35,563 $ 38,106 $ 7 $ 6 $ 3,273 1.2% Tax-Managed Growth.. 941 1,064 -- -- 2 0.1 Large Cap Growth.... 1,634 1,762 1 -- 107 1.7 Small Cap Growth.... 165,494 193,169 89 76 14,797 2.3 Small-Mid Cap Growth 9,442 8,761 -- 2 761 5.3 International Growth 136,438 212,025 153 132 23,483 0.9 International Equity 1,835 1,499 -- -- 336 9.7 Value Discovery..... 42,580 46,904 20 17 2,172 0.8 (3) Investment Transactions Investment transactions, excluding money market instruments, for the period ended June 30, 2004 were as follows (in thousands): Portfolio Purchases Sales --------- --------- -------- Growth.............. $ 46,582 $ 56,341 Tax-Managed Growth.. 690 1,827 Large Cap Growth.... 1,703 795 Small Cap Growth.... 336,529 249,858 Small-Mid Cap Growth 12,176 2,793 International Growth 1,586,293 931,285 International Equity 2,897 79 Value Discovery..... 63,297 44,338 Income.............. 59,224 49,442 (4) Foreign Currency Forward Contracts To protect itself against a decline in the value of foreign currency against the U.S. dollar, the International Growth Portfolio enters into foreign currency forward contracts with its custodian and others. The Portfolio bears the market risk that arises from changes in foreign currency rates and bears the credit risk if the counterparty fails to perform under the contract. The net realized and unrealized gains and losses associated with foreign currency forward contracts are reflected in the accompanying financial statements. There were no open foreign currency forward contracts at June 30, 2004. (6) Fund Share Transactions There were no Fund share transactions to report for the Funds' Class A, Class B, and Class C shares with the exception of International Equity Fund which commenced operations on May 24, 2004. International Equity Fund sold 200 shares of Class A, Class B, and Class C shares at a $10.00 NAV for a total of 600 shares and $6,000. The Class A, B and C shares of this Fund are closed to any additional investors. For all other Funds, Class A shares, Class B shares and Class C shares, each have one open account held by William Blair & Company, L.L.C. There have been no purchases, reinvestments of dividends or redemptions in these accounts since they initially opened with 200 shares each on May 25, 2001. June 30, 2004 William Blair Funds 57 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- Growth Fund Class A ------------------------------------------------------ Period Ended Years Ended December 31, ------------ ---------------------------------------- 6/30/2004 2003 2002 2001 2000 1999(a) --------- ---- ---- ---- ---- ------- Net asset value, beginning of period..................... $ 9.97 $ 8.05 $ 10.87 $ 12.72 $20.09 $17.48 Income (loss) from investment operations: Net investment income (loss)........................... (0.02) (0.06) (0.07) (0.05) (0.06) -- Net realized and unrealized gain (loss) on investments. 0.01 1.98 (2.75) (1.66) (1.52) 4.05 ------ ------ ------- ------- ------ ------ Total from investment operations......................... (0.01) 1.92 (2.82) (1.71) (1.58) 4.05 Less distributions from: Net investment income.................................. -- -- -- -- -- -- Net realized gain...................................... -- -- -- 0.14 5.79 1.44 ------ ------ ------- ------- ------ ------ Total distributions...................................... -- -- -- 0.14 5.79 1.44 ------ ------ ------- ------- ------ ------ Net asset value, end of period........................... $ 9.96 $ 9.97 $ 8.05 $ 10.87 $12.72 $20.09 ====== ====== ======= ======= ====== ====== Total return (%)......................................... (0.10) 23.85 (25.94) (13.46) (7.47) 23.29 Ratios to average daily net assets (%) (c): Expenses............................................... 1.18 1.19 1.19 1.18 1.13 1.31 Net investment income (loss)........................... (0.54) (0.67) (0.73) (0.57) (0.29) (0.23) Class B ------------------------------------------------------ Period Ended Years Ended December 31, ------------ ---------------------------------------- 6/30/2004 2003 2002 2001 2000 1999(b) --------- ---- ---- ---- ---- ------- Net asset value, beginning of period..................... $ 9.61 $ 7.82 $ 10.63 $ 12.56 $20.07 $19.15 Income (loss) from investment operations: Net investment income (loss)........................... (0.06) (0.12) (0.13) (0.14) (0.20) (0.02) Net realized and unrealized gain (loss) on investments. 0.01 1.91 (2.68) (1.65) (1.52) 3.38 ------ ------ ------- ------- ------ ------ Total from investment operations......................... (0.05) 1.79 (2.81) (1.79) (1.72) 2.36 Less distributions from: Net investment income.................................. -- -- -- -- -- -- Net realized gain...................................... -- -- -- 0.14 5.79 1.44 ------ ------ ------- ------- ------ ------ Total distributions...................................... -- -- -- 0.14 5.79 1.44 ------ ------ ------- ------- ------ ------ Net asset value, end of period........................... $ 9.56 $ 9.61 $ 7.82 $ 10.63 $12.56 $20.07 ====== ====== ======= ======= ====== ====== Total return (%)......................................... (0.52) 22.89 (26.43) (14.27) (8.17) 12.43 Ratios to average daily net assets (%) (c): Expenses............................................... 1.93 1.94 1.94 1.93 1.88 2.03 Net investment income (loss)........................... (1.29) (1.42) (1.48) (1.32) (1.04) (1.00) --------------------------------------------------------- Period Ended Years Ended December 31, ------------ -------------------------------------------- 6/30/2004 2003 2002 2001 2000 1999 --------- ---- ---- ---- ---- ---- Supplemental data for all classes: Net assets at end of period (in thousands). $274,613 $281,654 $255,625 $386,096 $550,987 $818,443 Portfolio turnover rate (%) (c):........... 34 45 29 74 88 52 - ---------- (a)For the period from October 19, 1999 (Commencement of the Class) to December 31, 1999. (b)For the period November 2, 1999 (Commencement of the Class) to December 31, 1999. (c)Rates are annualized for periods that are less than a year. Note: Net investment income (loss) per share for 2004, 2003, 2002, 2001 and 2000 is based on the average shares outstanding during the period. 58 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- Growth Fund Class C - - ------------------------------------------------------ Period Ended Years Ended December 31, ------------ ---------------------------------------- 6/30/2004 2003 2002 2001 2000 1999(b) --------- ---- ---- ---- ---- ------- Net asset value, beginning of period..................... $ 9.60 $ 7.82 $ 10.63 $ 12.54 $20.06 $19.15 Income (loss) from investment operations: Net investment income (loss)........................... (0.06) (0.12) (0.13) (0.14) (0.20) (0.03) Net realized and unrealized gain (loss) on investments. 0.01 1.90 (2.68) (1.63) (1.53) 2.38 ------ ------ ------- ------- ------ ------ Total from investment operations......................... (0.05) 1.78 (2.81) (1.77) (1.73) 2.35 Less distributions from: Net investment income.................................. -- -- -- -- -- -- Net realized gain...................................... -- -- -- 0.14 5.79 1.44 ------ ------ ------- ------- ------ ------ Total distributions...................................... -- -- -- 0.14 5.79 1.44 ------ ------ ------- ------- ------ ------ Net asset value, end of period........................... $ 9.55 $ 9.60 $ 7.82 $ 10.63 $12.54 $20.06 ====== ====== ======= ======= ====== ====== Total return (%)......................................... (0.52) 22.76 (26.43) (14.13) (8.22) 12.38 Ratios to average daily net assets (%) (c): Expenses............................................... 1.93 1.94 1.94 1.93 1.88 2.01 Net investment income (loss)........................... (1.29) (1.42) (1.48) (1.32) (1.01) (1.06) - - --------------------------------------------------------- Period Ended Years Ended December 31, ------------ -------------------------------------------- 6/30/2004 2003 2002 2001 2000 1999 --------- ---- ---- ---- ---- ---- Supplemental data for all classes: Net assets at end of period (in thousands). $274,613 $281,654 $255,625 $386,096 $550,987 $818,443 Portfolio turnover rate (%) (c)............ 39 45 29 74 88 52 - ---------- (a)For the period from October 19, 1999 (Commencement of the Class) to December 31, 1999. (b)For the period November 2, 1999 (Commencement of the Class) to December 31, 1999. (c)Rates are annualized for periods that are less than a year. Note: Net investment income (loss) per share for 2004, 2003, 2002, 2001 and 2000 is based on the average shares outstanding during the period. June 30, 2004 William Blair Funds 59 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- Tax-Managed Growth Fund Class A -------------------------------------------------------- Period Ended Years Ended December 31, ------------ ------------------------------------------ 6/30/2004 2003 2002 2001 2000 1999(a) --------- ---- ---- ---- ---- ------- Net asset value, beginning of period.............................. $ 8.40 $ 6.85 $ 9.06 $ 10.08 $ 10.18 $10.00 Income (loss) from investment operations: Net investment income (loss).................................... (0.04) (0.07) (0.06) (0.04) (0.04) -- Net realized and unrealized gain (loss) on investments.......... 0.13 1.62 (2.15) (0.98) (0.06) 0.18 ------ ------ ------- ------- ------- ------ Total from investment operations.................................. 0.09 1.55 (2.21) (1.02) (0.10) 0.18 Less distributions from: Net investment income........................................... -- -- -- -- -- -- Net realized gain............................................... -- -- -- -- -- -- ------ ------ ------- ------- ------- ------ Total distributions............................................... -- -- -- -- -- -- ------ ------ ------- ------- ------- ------ Net asset value, end of period.................................... $ 8.49 $ 8.40 $ 6.85 $ 9.06 $ 10.08 $10.18 ====== ====== ======= ======= ======= ====== Total return (%).................................................. 1.07 22.63 (24.39) (10.12) (0.98) 1.80 Ratios to average daily net assets (%) (b) Expenses, net of waivers and reimbursements..................... 1.55 1.49 1.36 1.36 1.36 1.36 Expenses, before waivers and reimbursements..................... 2.19 2.26 2.22 3.64 11.34 1.36 Net investment income (loss), net of waivers and reimbursements. (1.02) (0.91) (0.72) (0.57) (0.41) 0.73 Net investment income (loss), before waivers and reimbursements. (1.66) (1.68) (1.58) (2.85) (10.39) 0.73 Class B -------------------------------------------------------- Period Ended Years Ended December 31, ------------ ------------------------------------------ 6/30/2004 2003 2002 2001 2000 1999(a) --------- ---- ---- ---- ---- ------- Net asset value, beginning of period.............................. $ 8.14 $ 6.69 $ 8.93 $ 10.01 $ 10.18 $10.00 Income (loss) from investment operations: Net investment income (loss).................................... (0.07) (0.12) (0.11) (0.11) (0.12) -- Net realized and unrealized gain (loss) on investments.......... 0.13 1.57 (2.13) (0.97) (0.05) 0.18 ------ ------ ------- ------- ------- ------ Total from investment operations.................................. 0.06 1.45 (2.24) (1.08) (0.17) 0.18 Less distributions from: Net investment income........................................... -- -- -- -- -- -- Net realized gain............................................... -- -- -- -- -- -- ------ ------ ------- ------- ------- ------ Total distributions............................................... -- -- -- -- -- -- ------ ------ ------- ------- ------- ------ Net asset value, end of period.................................... $ 8.20 $ 8.14 $ 6.69 $ 8.93 $ 10.01 $10.18 ====== ====== ======= ======= ======= ====== Total return (%).................................................. 0.74 21.67 (25.08) (10.79) (1.67) 1.80 Ratios to average daily net assets (%) (b) Expenses, net of waivers and reimbursements..................... 2.30 2.24 2.11 2.11 2.11 2.11 Expenses, before waivers and reimbursements..................... 2.94 3.01 2.97 4.39 12.09 2.11 Net investment income (loss), net of waivers and reimbursements. (1.77) (1.66) (1.47) (1.32) (1.16) (0.01) Net investment income (loss), before waivers and reimbursements. (2.41) (2.43) (2.33) (3.60) (11.14) (0.01) -------------------------------------------------------- Period Ended Years Ended December 31, ------------ ------------------------------------------ 6/30/2004 2003 2002 2001 2000 1999 --------- ---- ---- ---- ---- ---- Supplemental data for all classes: Net assets at end of period (in thousands)...................... $5,720 $6,871 $ 5,303 $ 7,211 $ 5,001 $1,018 Portfolio turnover rate (%) (b)................................. 22 37 44 37 32 -- - ---------- (a)For the period from December 27, 1999 (Commencement of Operations) to December 31, 1999. (b)Rates are annualized for periods that are less than a year. Note: Net investment income (loss) per share for 2004, 2003, 2002, 2001 and 2000 is based on the average shares outstanding during the period. 60 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- Tax-Managed Growth Fund Class C ------------------------------------------------------- Period Ended Years Ended December 31, ------------ ----------------------------------------- 6/30/2004 2003 2002 2001 2000 1999(a) --------- ---- ---- ---- ---- ------- Net asset value, beginning of period.............................. $ 8.14 $ 6.69 $ 8.93 $ 10.01 $ 10.18 $10.00 Income (loss) from investment operations: Net investment income (loss).................................... (0.07) (0.12) (0.11) (0.11) (0.12) -- Net realized and unrealized gain (loss) on investments.......... 0.13 1.57 (2.13) (0.97) (0.05) 0.18 ------ ------ ------- ------- ------- ------ Total from investment operations.................................. 0.06 1.45 (2.24) (1.08) (0.17) 0.18 Less distributions from: Net investment income........................................... -- -- -- -- -- -- Net realized gain............................................... -- -- -- -- -- -- ------ ------ ------- ------- ------- ------ Total distributions............................................... -- -- -- -- -- -- ------ ------ ------- ------- ------- ------ Net asset value, end of period.................................... $ 8.20 $ 8.14 $ 6.69 $ 8.93 $ 10.01 $10.18 ====== ====== ======= ======= ======= ====== Total return (%).................................................. 0.74 21.67 (25.08) (10.79) (1.67) 1.80 Ratios to average daily net assets (%) (b) Expenses, net of waivers and reimbursements..................... 2.30 2.24 2.11 2.11 2.11 2.11 Expenses, before waivers and reimbursements..................... 2.94 3.01 2.97 4.39 12.09 2.11 Net investment income (loss), net of waivers and reimbursements. (1.77) (1.66) (1.47) (1.32) (1.15) (0.01) Net investment income (loss), before waivers and reimbursements. (2.41) (2.43) (2.33) (3.60) (11.13) (0.01) ----------------------------------------------- Period Ended Years Ended December 31, ------------ ---------------------------------- 6/30/2004 2003 2002 2001 2000 1999 --------- ---- ---- ---- ---- ---- Supplemental data for all classes: Net assets at end of period (in thousands). $5,720 $6,871 $5,303 $7,211 $5,001 $1,018 Portfolio turnover rate (%) (b)............ 22 37 44 37 32 -- - ---------- (a)For the period from December 27, 1999 (Commencement of Operations) to December 31, 1999. (b)Rates are annualized for periods that are less than a year. Note: Net investment income (loss) per share for 2004, 2003, 2002, 2001 and 2000 is based on the average shares outstanding during the period. June 30, 2004 William Blair Funds 61 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- Large Cap Growth Fund Class A ------------------------------------------------------- Period Ended Years Ended December 31, ------------ ----------------------------------------- 6/30/2004 2003 2002 2001 2000 1999(a) --------- ---- ---- ---- ---- ------- Net asset value, beginning of period.............................. $ 5.92 $ 4.78 $ 6.69 $ 8.45 $ 10.14 $10.00 Income (loss) from investment operations: Net investment income (loss).................................... (0.02) (0.04) (0.04) (0.06) (0.07) -- Net realized and unrealized gain (loss) on investments.......... (0.03) 1.18 (1.87) (1.70) (1.62) 0.14 ------ ------ ------- ------- ------- ------ Total from investment operations.................................. (0.05) 1.14 (1.91) (1.76) (1.69) 0.14 Less distributions from: Net investment income........................................... -- -- -- -- -- -- Net realized gain............................................... -- -- -- -- -- -- ------ ------ ------- ------- ------- ------ Total distributions............................................... -- -- -- -- -- -- ------ ------ ------- ------- ------- ------ Net asset value, end of period.................................... $ 5.87 $ 5.92 $ 4.78 $ 6.69 $ 8.45 $10.14 ====== ====== ======= ======= ======= ====== Total return (%).................................................. (0.84) 23.85 (28.55) (20.83) (16.67) 1.40 Ratios to average daily net assets (%) (b) Expenses, net of waivers and reimbursements..................... 1.41 1.42 1.36 1.36 1.36 1.36 Expenses, before waivers and reimbursements..................... 2.31 2.39 2.45 3.01 2.84 1.36 Net investment income (loss), net of waivers and reimbursements. (0.61) (0.76) (0.71) (0.79) (0.68) (0.48) Net investment income (loss), before waivers and reimbursements. (1.51) (1.73) (1.80) (2.44) (2.16) (0.48) Class B ------------------------------------------------------- Period Ended Years Ended December 31, ------------ ----------------------------------------- 6/30/2004 2003 2002 2001 2000 1999(a) --------- ---- ---- ---- ---- ------- Net asset value, beginning of period.............................. $ 5.73 $ 4.67 $ 6.58 $ 8.39 $ 10.14 $10.00 Income (loss) from investment operations: Net investment income (loss).................................... (0.04) (0.08) (0.08) (0.11) (0.13) -- Net realized and unrealized gain (loss) on investments.......... (0.03) 1.14 (1.83) (1.70) (1.62) 0.14 ------ ------ ------- ------- ------- ------ Total from investment operations.................................. (0.07) 1.06 (1.91) (1.81) (1.75) 0.14 Less distributions from: Net investment income........................................... -- -- -- -- -- -- Net realized gain............................................... -- -- -- -- -- -- ------ ------ ------- ------- ------- ------ Total distributions............................................... -- -- -- -- -- -- ------ ------ ------- ------- ------- ------ Net asset value, end of period.................................... $ 5.66 $ 5.73 $ 4.67 $ 6.58 $ 8.39 $10.14 ====== ====== ======= ======= ======= ====== Total return (%).................................................. (1.22) 22.70 (29.03) (21.57) (17.26) 1.40 Ratios to average daily net assets (%) (b) Expenses, net of waivers and reimbursements..................... 2.16 2.17 2.11 2.11 2.11 2.11 Expenses, before waivers and reimbursements..................... 3.06 3.14 3.20 3.76 3.59 2.11 Net investment income (loss), net of waivers and reimbursements. (1.36) (1.51) (1.46) (1.54) (1.43) (1.41) Net investment income (loss), before waivers and reimbursements. (2.26) (2.48) (2.55) (3.19) (2.91) (1.41) ------------------------------------------------ Period Ended Years Ended December 31, ------------ ----------------------------------- 6/30/2004 2003 2002 2001 2000 1999 --------- ---- ---- ---- ---- ---- Supplemental data for all classes: Net assets at end of period (in thousands). $6,268 $5,519 $5,469 $5,991 $10,995 $1,153 Portfolio turnover rate (%) (b)............ 28 33 52 87 95 -- - ---------- (a)For the period from December 27, 1999 (Commencement of Operations) to December 31, 1999. (b)Rates are annualized for periods that are less than a year. Note: Net investment income (loss) per share for 2004, 2003, 2002, 2001 and 2000 is based on the average shares outstanding during the period. 62 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- Large Cap Growth Fund Class C ------------------------------------------------------- Period Ended Years Ended December 31, ------------ ----------------------------------------- 6/30/2004 2003 2002 2001 2000 1999(a) --------- ---- ---- ---- ---- ------- Net asset value, beginning of period.............................. $ 5.72 $ 4.66 $ 6.57 $ 8.39 $ 10.14 $10.00 Income (loss) from investment operations: Net investment income (loss).................................... (0.04) (0.08) (0.08) (0.11) (0.14) -- Net realized and unrealized gain (loss) on investments.......... (0.03) 1.14 (1.83) (1.71) (1.61) 0.14 ------ ------ ------- ------- ------- ------ Total from investment operations.................................. (0.07) 1.06 (1.91) (1.82) (1.75) 0.14 Less distributions from: Net investment income........................................... -- -- -- -- -- -- Net realized gain............................................... -- -- -- -- -- -- ------ ------ ------- ------- ------- ------ Total distributions............................................... -- -- -- -- -- -- ------ ------ ------- ------- ------- ------ Net asset value, end of period.................................... $ 5.65 $ 5.72 $ 4.66 $ 6.57 $ 8.39 $10.14 ====== ====== ======= ======= ======= ====== Total return (%).................................................. (1.22) 22.75 (29.07) (21.69) (17.26) 1.40 Ratios to average daily net assets (%) (b) Expenses, net of waivers and reimbursements..................... 2.16 2.17 2.11 2.11 2.11 2.11 Expenses, before waivers and reimbursements..................... 3.06 3.14 3.20 3.76 3.59 2.11 Net investment income (loss), net of waivers and reimbursements. (1.36) (1.51) (1.46) (1.54) (1.41) (1.41) Net investment income (loss), before waivers and reimbursements. (2.26) (2.48) (2.55) (3.19) (2.89) (1.41) ------------------------------------------------ Period Ended Years Ended December 31, ------------ ----------------------------------- 6/30/2004 2003 2002 2001 2000 1999 --------- ---- ---- ---- ---- ---- Supplemental data for all classes: Net assets at end of period (in thousands). $6,268 $5,519 $5,469 $5,991 $10,995 $1,153 Portfolio turnover rate (%) (b)............ 28 33 52 87 95 -- - ---------- (a)For the period from December 27, 1999 (Commencement of Operations) to December 31, 1999. (b)Rates are annualized for periods that are less than a year. Note: Net investment income (loss) per share for 2004, 2003, 2002, 2001 and 2000 is based on the average shares outstanding during the period. June 30, 2004 William Blair Funds 63 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- Small Cap Growth Fund Class A ----------------------------------------------------- Period Ended Years Ended December 31, - - ------------ --------------------------------------- 6/30/2004 2003 2002 2001 2000 1999(a) --------- ---- ---- ---- ---- ------- Net asset value, beginning of period.............................. $21.82 $13.72 $ 16.57 $13.16 $10.19 $10.00 Income (loss) from investment operations: Net investment income (loss).................................... (0.15) (0.21) (0.19) (0.11) (0.14) -- Net realized and unrealized gain (loss) on investments.......... 2.65 8.67 (2.66) 3.52 3.54 0.19 ------ ------ ------- ------ ------ ------ Total from investment operations.................................. 2.50 8.46 (2.85) 3.41 3.40 0.19 Less distributions from: Net investment income........................................... -- -- -- -- -- -- Net realized gain............................................... -- 0.36 -- -- 0.43 -- ------ ------ ------- ------ ------ ------ Total distributions............................................... -- 0.36 -- -- 0.43 -- ------ ------ ------- ------ ------ ------ Net asset value, end of period.................................... $24.32 $21.82 $ 13.72 $16.57 $13.16 $10.19 ====== ====== ======= ====== ====== ====== Total return (%).................................................. 11.46 61.81 (17.20) 25.91 33.68 1.90 Ratios to average daily net assets (%): Expenses, net of waivers and reimbursements..................... 1.53 1.60 1.56 1.59 1.60 1.60 Expenses, before waivers and reimbursements..................... 1.50 1.53 1.62 1.95 2.17 1.60 Net investment income (loss), net of waivers and reimbursements. (1.33) (1.27) (1.31) (1.15) (0.85) (1.60) Net investment income (loss), before waivers and reimbursements. (1.30) (1.20) (1.37) (1.51) (1.42) (1.60) Class B ----------------------------------------------------- Period Ended Years Ended December 31, ------------ --------------------------------------- 6/30/2004 2003 2002 2001 2000 1999(a) --------- ---- ---- ---- ---- ------- Net asset value, beginning of period.............................. $21.13 $13.40 $ 16.31 $13.05 $10.19 $10.00 Income (loss) from investment operations: Net investment income (loss).................................... (0.23) (0.34) (0.30) (0.22) (0.24) -- Net realized and unrealized gain (loss) on investments.......... 2.57 8.43 (2.61) 3.48 3.53 0.19 ------ ------ ------- ------ ------ ------ Total from investment operations.................................. 2.34 8.09 (2.91) 3.26 3.29 0.19 Less distributions from: Net investment income........................................... -- -- -- -- -- -- Net realized gain............................................... -- 0.36 -- -- 0.43 -- ------ ------ ------- ------ ------ ------ Total distributions............................................... -- 0.36 -- -- 0.43 -- ------ ------ ------- ------ ------ ------ Net asset value, end of period.................................... $23.47 $21.13 $ 13.40 $16.31 $13.05 $10.19 ====== ====== ======= ====== ====== ====== Total return (%).................................................. 11.07 60.51 (17.84) 24.98 32.60 1.90 Ratios to average daily net assets (%): Expenses, net of waivers and reimbursements..................... 2.28 2.35 2.31 2.34 2.35 2.35 Expenses, before waivers and reimbursements..................... 2.25 2.28 2.37 2.70 2.92 2.35 Net investment income (loss), net of waivers and reimbursements. (2.08) (2.02) (2.06) (1.90) (1.70) (2.35) Net investment income (loss), before waivers and reimbursements. (2.05) (1.95) (2.12) (2.26) (2.27) (2.35) -------------------------------------------------------- Period Ended Years Ended December 31, ------------ - --------------------------------------- 6/30/2004 2003 2002 2001 2000 1999 --------- - ---- ---- ---- ---- ---- Supplemental data for all classes: Net assets at end of period (in thousands). $651,503 $518,824 $78,581 $54,658 $28,778 $6,346 Portfolio turnover rate (%)................ 88 103 133 147 433 -- - ---------- (a)For the period from December 27, 1999 (Commencement of Operations) to December 31, 1999. (b)Rates are annualized for periods that are less than a year. Note: Net investment income (loss) per share for 2004, 2003, 2002, 2001 and 2000 is based on the average shares outstanding during the period. 64 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- Small Cap Growth Fund Class C ----------------------------------------------------- Period Ended Years Ended December 31, ------------ --------------------------------------- 6/30/2004 2003 2002 2001 2000 1999(a) --------- ---- ---- ---- ---- ------- Net asset value, beginning of period.............................. $21.14 $13.40 $ 16.32 $13.05 $10.19 $10.00 Income (loss) from investment operations: Net investment income (loss).................................... (0.23) (0.34) (0.30) (0.22) (0.25) -- Net realized and unrealized gain (loss) on investments.......... 2.57 8.44 (2.62) 3.49 3.54 0.19 ------ ------ ------- ------ ------ ------ Total from investment operations.................................. 2.34 8.10 (2.92) 3.27 3.29 0.19 Less distributions from: Net investment income........................................... -- -- -- -- -- -- Net realized gain............................................... -- 0.36 -- -- 0.43 -- ------ ------ ------- ------ ------ ------ Total distributions............................................... -- 0.36 -- -- 0.43 -- ------ ------ ------- ------ ------ ------ Net asset value, end of period.................................... $23.48 $21.14 $ 13.40 $16.32 $13.05 $10.19 ====== ====== ======= ====== ====== ====== Total return (%).................................................. 11.07 60.59 (17.89) 25.06 32.60 1.90 Ratios to average daily net assets (%): Expenses, net of waivers and reimbursements..................... 2.28 2.35 2.31 2.34 2.35 2.35 Expenses, before waivers and reimbursements..................... 2.25 2.28 2.37 2.70 2.92 2.35 Net investment income (loss), net of waivers and reimbursements. (2.68) (2.02) (2.06) (1.90) (1.70) (2.35) Net investment income (loss), before waivers and reimbursements. (2.05) (1.95) (2.12) (2.26) (2.27) (2.35) ---------------------------------------------------- Period Ended Years Ended December 31, ------------ --------------------------------------- 6/30/2004 2003 2002 2001 2000 1999 --------- ---- ---- ---- ---- ---- Supplemental data for all classes: Net assets at end of period (in thousands). $651,503 $518,824 $78,581 $54,658 $28,778 $6,346 Portfolio turnover rate (%)................ 88 103 133 147 433 -- - ---------- (a)For the period from December 27, 1999 (Commencement of Operations) to December 31, 1999. (b)Rates are annualized for periods that are less than a year. Note: Net investment income (loss) per share for 2004, 2003, 2002, 2001 and 2000 is based on the average shares outstanding during the period. June 30, 2004 William Blair Funds 65 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- Small-Mid Cap Growth Fund Class A - - ------------------------------------------- Period Ended Period Ended December 31, - - ------------ - - ------------------------- 6/30/2004 2003(a) - - --------- - - ------- Net asset value, beginning of period.............................. $ 9.94 $10.00 Income (loss) from investment operations: Net investment income (loss).................................... (0.06) -- Net realized and unrealized gain (loss) on investments.......... 0.75 (0.06) ------ - - ------ Total from investment operations.................................. 0.69 (0.06) Less distributions from: Net investment income........................................... -- -- Net realized gain............................................... -- -- ------ - - ------ Total distributions............................................... -- -- ------ - - ------ Net asset value, end of period.................................... $10.63 $ 9.94 ====== = = ====== Total return (%).................................................. 6.94 (0.60) Ratios to average daily net assets (%) (b): Expenses, net of waivers and reimbursements..................... 1.54 1.54 Expenses, before waivers and reimbursements..................... 2.99 1.54 Net investment income (loss), net of waivers and reimbursements. (1.25) (1.54) Net investment income (loss), before waivers and reimbursements. (2.70) (1.54) Class B ------------------------------------------- Period Ended Period Ended December 31, ------------ - - ------------------------- 6/30/2004 2003(a) --------- - - ------- Net asset value, beginning of period $ 9.94 $10.00 Income (loss) from investment operations: Net investment income (loss).................................... (0.10) -- Net realized and unrealized gain (loss) on investments.......... 0.75 (0.06) ------ - - ------ Total from investment operations.................................. 0.65 (0.06) Less distributions from: Net investment income........................................... -- -- Net realized gain............................................... -- -- ------ - - ------ Total distributions............................................... -- -- ------ - - ------ Net asset value, end of period.................................... $10.59 $ 9.94 ====== = = ====== Total return (%).................................................. 6.54 (0.60) Ratios to average daily net assets (%) (b): Expenses, net of waivers and reimbursements..................... 2.29 2.29 Expenses, before waivers and reimbursements..................... 3.79 2.29 Net investment income (loss), net of waivers and reimbursements. (2.00) (2.29) Net investment income (loss), before waivers and reimbursements. (3.45) (2.29) ------------------------------------------- Period Ended Period Ended December 31, ------------ - - ------------------------- 6/30/2004 2003 - - --------- - - ---- Supplemental data for all classes: Net assets at end of period (in thousands). $14,436 $3,673 Portfolio turnover rate (%) (b)............ 69 -- - ---------- (a)For the period from December 29, 2003 (Commencement of Operations) to December 31, 2003. (b)Rates are annualized for periods that are less than a year. Note: Net investment income (loss) per share for 2004 and 2003 is based on the average shares outstanding during the period. 66 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- Small-Mid Cap Growth Fund Class C --------------------------------------- Period Ended Period Ended December 31, ------------ ------------------------- 6/30/2004 2003(a) --------- ------- Net asset value, beginning of period.............................. $ 9.94 $10.00 Income (loss) from investment operations: Net investment income (loss).................................... (0.10) -- Net realized and unrealized gain (loss) on investments.......... 0.75 (0.06) ------ ------ Total from investment operations.................................. 0.65 (0.06) Less distributions from: Net investment income........................................... -- -- Net realized gain............................................... -- -- ------ ------ Total distributions............................................... -- -- ------ ------ Net asset value, end of period.................................... $10.59 $ 9.94 ====== ====== Total return (%).................................................. 6.54 (0.60) Ratios to average daily net assets (%) (b) Expenses, net of waivers and reimbursements..................... 2.29 2.29 Expenses, before waivers and reimbursements..................... 3.74 2.29 Net investment income (loss), net of waivers and reimbursements. (2.00) (2.29) Net investment income (loss), before waivers and reimbursements. (3.45) (2.29) -------------------------------------- Period Ended Period Ended December 31, ------------ ------------------------- 6/30/2004 2003 --------- ---- Supplemental data for all classes: Net assets at end of period (in thousands). $14,436 $3,673 Portfolio turnover rate (%) (b)............ 69 -- - ---------- (a)For the period from December 29, 2003 (Commencement of Operations) to December 31, 2003. (b)Rates are annualized for periods that are less than a year. Note: Net investment income (loss) per share for 2004 and 2003 is based on the average shares outstanding during the period. June 30, 2004 William Blair Funds 67 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- International Growth Fund Class A ------------------------------------------------------ Period Ended Years Ended December 31, ------------ ---------------------------------------- 6/30/2004 2003 2002 2001 2000 1999(b) --------- ---- ---- ---- ---- ------- Net asset value, beginning of period..................... $18.63 $13.12 $ 15.46 $ 17.90 $24.01 $20.61 Income (loss) from investment operations: Net investment income (loss) (a)....................... 0.01 0.03 (0.05) 0.07 (0.04) (0.03) Net realized and unrealized gain (loss) on investments. 0.55 5.49 (2.29) (2.51) (2.01) 7.92 ------ ------ ------- ------- ------ ------ Total from investment operations......................... 0.56 5.52 (2.34) (2.44) (2.05) 7.89 Less distributions from: Net investment income.................................. -- -- -- -- 0.09 -- Net realized gain...................................... -- 0.01 -- -- 3.97 4.49 ------ ------ ------- ------- ------ ------ Total distributions...................................... -- 0.01 -- -- 4.06 4.49 ------ ------ ------- ------- ------ ------ Net asset value, end of period........................... $19.19 $18.63 $ 13.12 $ 15.46 $17.90 $24.01 ====== ====== ======= ======= ====== ====== Total return (%)......................................... 3.01 42.10 (15.14) (13.63) (8.11) 39.12 Ratios to average daily net assets (%) (d) Expenses............................................... 1.47 1.50 1.51 1.60 1.59 1.60 Net investment income (loss)........................... 0.18 0.05 (0.36) (0.11) (0.37) (1.25) Class B ------------------------------------------------------ Period Ended Years Ended December 31, ------------ ---------------------------------------- 6/30/2004 2003 2002 2001 2000 1999(c) --------- ---- ---- ---- ---- ------- Net asset value, beginning of period..................... $17.83 $12.64 $ 15.01 $ 17.52 $23.98 $21.33 Income (loss) from investment operations: Net investment income (loss) (a)....................... (0.06) (0.09) (0.15) (0.07) (0.23) (0.04) Net realized and unrealized gain (loss) on investments. 0.52 5.28 (2.22) (2.44) (1.99) 7.18 ------ ------ ------- ------- ------ ------ Total from investment operations......................... 0.46 5.19 (2.37) (2.51) (2.22) 7.14 Less distributions from: Net investment income.................................. -- -- -- -- 0.27 -- Net realized gain...................................... -- -- -- -- 3.97 4.49 ------ ------ ------- ------- ------ ------ Total distributions...................................... -- -- -- -- 4.24 4.49 ------ ------ ------- ------- ------ ------ Net asset value, end of period........................... $18.29 $17.83 $ 12.64 $ 15.01 $17.52 $23.98 ====== ====== ======= ======= ====== ====== Total return (%)......................................... 2.58 41.06 (15.79) (14.33) (8.79) 34.28 Ratios to average daily net assets (%) (d) Expenses............................................... 2.22 2.25 2.26 2.35 2.34 2.35 Net investment income (loss)........................... (0.57) (0.70) (1.11) (0.86) (1.16) (1.93) ----------------------------------------------------------- Period Ended Years Ended December 31, ------------ ---------------------------------------------- 6/30/2004 2003 2002 2001 2000 1999 --------- ---- ---- ---- ---- ---- Supplemental data for all classes: Net assets at end of period (in thousands). $2,536,318 $1,899,699 $778,788 $454,055 $333,888 $302,089 Portfolio turnover rate (%) (d)............ 85 57 73 112 116 122 - ---------- (a)Includes $0.03, $0.00, $0.00, $0.06 and $0.00 in PFIC transactions which are treated as ordinary income for Federal tax purposes for the years 2003, 2002, 2001, 2000 and 1999, respectively. (b)For the period from October 21, 1999 (Commencement of the Class) to December 31, 1999 (c)For the period November 2, 1999 (Commencement of the Class) to December 31, 1999. (d)Rates are annualized for periods that are less than a year. Note: Net investment income (loss) per share for 2004, 2003, 2002, 2001 and 2000 is based on the average shares outstanding during the period. 68 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- International Growth Fund Class C ------------------------------------------------------ Period Ended Years Ended December 31, ------------ ---------------------------------------- 6/30/2004 2003 2002 2001 2000 1999(c) --------- ---- ---- ---- ---- ------- Net asset value, beginning of period..................... $17.83 $12.64 $ 15.01 $ 17.52 $23.98 $21.33 Income (loss) from investment operations: Net investment income (loss) (a)....................... (0.06) (0.09) (0.15) (0.07) (0.23) (0.04) Net realized and unrealized gain (loss) on investments. 0.52 5.28 (2.22) (2.44) (1.99) 7.18 ------ ------ ------- ------- ------ ------ Total from investment operations......................... 0.46 5.19 (2.37) (2.51) (2.22) 7.14 Less distributions from: Net investment income.................................. -- -- -- -- 0.27 -- Net realized gain...................................... -- -- -- -- 3.97 4.49 ------ ------ ------- ------- ------ ------ Total distributions...................................... -- -- -- -- 4.24 4.49 ------ ------ ------- ------- ------ ------ Net asset value, end of period........................... $18.29 $17.83 $ 12.64 $ 15.01 $17.52 $23.98 ====== ====== ======= ======= ====== ====== Total return (%)......................................... 2.58 41.06 (15.79) (14.33) (8.81) 34.28 Ratios to average daily net assets (%) (d) Expenses............................................... 2.22 2.25 2.26 2.35 2.34 2.35 Net investment income (loss)........................... (0.57) (0.70) (1.11) (0.86) (1.10) (1.93) ------------------------------------------------------------ Period Ended Years Ended December 31, ------------ ---------------------------------------------- 6/30/2004 2003 2002 2001 2000 1999 --------- ---- ---- ---- ---- ---- Supplemental data for all classes: Net assets at end of period (in thousands). $2,536,318 $1,899,699 $778,788 $454,055 $333,888 $302,089 Portfolio turnover rate (%) (d)............ 85 57 73 112 116 122 - ---------- (a)Includes $0.03, $0.00, $0.00, $0.06 and $0.00 in PFIC transactions which are treated as ordinary income for Federal tax purposes for the years 2003, 2002, 2001, 2000 and 1999, respectively. (b)For the period from October 1, 1999 (Commencement of the Class) to December 31, 1999. (c)For the period November 3, 1999 (Commencement of the Class) to December 31, 1999. (d)Rates are annualized for periods that are less than a year. Note: Net investment income (loss) per share for 2004, 2003, 2002, 2001 and 2000 is based on the average shares outstanding during the period. June 30, 2004 William Blair Funds 69 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- International Equity Fund Class A --------------------- Period Ended June 30, --------------------- 2004(a) ------- Net asset value, beginning of period.............................. $10.00 Income (loss) from investment operations: Net investment income (loss).................................... (0.01) Net realized and unrealized gain (loss) on investments.......... 0.56 ------ Total from investment operations.................................. 0.55 Less distributions from: Net investment income........................................... -- Net realized gain............................................... -- ------ Total distributions............................................... -- ------ Net asset value, end of period.................................... $10.55 ====== Total return (%).................................................. 5.50 Ratios to average daily net assets (%) (b): Expenses, net of waivers and reimbursements..................... 1.50 Expenses, before waivers and reimbursements..................... 1.90 Net investment income (loss), net of waivers and reimbursements. (0.72) Net investment income (loss), before waivers and reimbursements. (1.12) Class B --------------------- Period Ended June 30, --------------------- 2004(a) ------- Net asset value, beginning of period.............................. $10.00 Income (loss) from investment operations: Net investment income (loss).................................... (0.02) Net realized and unrealized gain (loss) on investments.......... 0.57 ------ Total from investment operations.................................. 0.55 Less distributions from: Net investment income........................................... -- Net realized gain............................................... -- ------ Total distributions............................................... -- ------ Net asset value, end of period.................................... $10.55 ====== Total return (%).................................................. 5.50 Ratios to average daily net assets (%) (b): Expenses, net of waivers and reimbursements..................... 2.25 Expenses, before waivers and reimbursements..................... 2.65 Net investment income (loss), net of waivers and reimbursements. (1.47) Net investment income (loss), before waivers and reimbursements. (1.87) ---------------------- Period Ended June 30, --------------------- 2004(a) ------- Supplemental data for all classes: Net assets at end of period (in thousands)...................... $3,474 Portfolio turnover rate (%) (b)................................. 16 - ---------- (a)For the period from May 24, 2004 (Commencement of Operations) to June 30, 2004. (b)Rates are annualized for periods that are less than a year. Note: Net investment income (loss) per share for 2004 is based on the average shares outstanding during the period. 70 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- International Equity Fund Class C --------------------- Period Ended June 30, --------------------- 2004(a) ------- Net asset value, beginning of period.............................. $10.00 Income (loss) from investment operations: Net investment income (loss).................................... (0.02) Net realized and unrealized gain (loss) on investments.......... 0.57 ------ Total from investment operations.................................. 0.55 Less distributions from: Net investment income........................................... -- Net realized gain............................................... -- ------ Total distributions............................................... -- ------ Net asset value, end of period.................................... $10.55 ====== Total return (%).................................................. 5.50 Ratios to average daily net assets (%) (b): Expenses, net of waivers and reimbursements..................... 2.25 Expenses, before waivers and reimbursements..................... 2.65 Net investment income (loss), net of waivers and reimbursements. (1.47) Net investment income (loss), before waivers and reimbursements. (1.87) --------------------- Period Ended June 30, --------------------- 2004(a) ------- Supplemental data for all classes: Net assets at end of period (in thousands). $3,474 Portfolio turnover rate (%) (b)............ 16 - ---------- (a)For the period from May 24, 2004 (Commencement of Operations) to June 30, 2004. (b)Rates are annualized for periods that are less than a year. Note: Net investment income (loss) per share for 2004 is based on the average shares outstanding during the period. June 30, 2004 William Blair Funds 71 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- Value Discovery Fund Class A ---------------------------------------------------- Period Ended Years Ended December 31, ------------ -------------------------------------- 6/30/2004 2003 2002 2001 2000 1999(a) --------- ---- ---- ---- ---- ------- Net asset value, beginning of period.............................. $21.62 $15.54 $ 17.37 $16.25 $13.72 $12.60 Income (loss) from investment operations: Net investment income (loss).................................... (0.01) (0.07) (0.04) 0.09 0.09 0.02 Net realized and unrealized gain (loss) on investments.......... 1.14 6.15 (1.79) 2.75 2.53 1.12 ------ ------ ------- ------ ------ ------ Total from investment operations.................................. 1.13 6.08 (1.83) 2.84 2.62 1.14 Less distributions from: Net investment income........................................... -- -- -- 0.96 0.09 0.02 Net realized gain............................................... -- -- -- 0.76 -- -- ------ ------ ------- ------ ------ ------ Total distributions............................................... -- -- -- 1.72 0.09 0.02 ------ ------ ------- ------ ------ ------ Net asset value, end of period.................................... $22.75 $21.62 $ 15.54 $17.37 $16.25 $13.72 ====== ====== ======= ====== ====== ====== Total return (%).................................................. 5.23 39.12 (10.54) 17.42 19.09 9.01 Ratios to average daily net assets (%) (c): Expenses, net of waivers and reimbursements..................... 1.49 1.58 1.59 1.61 1.64 1.64 Expenses, before waivers and reimbursements..................... 1.49 1.58 1.59 1.66 1.88 1.67 Net investment income (loss), net of waivers and reimbursements. (0.11) (0.39) (0.22) 0.28 0.47 1.28 Net investment income (loss), before waivers and reimbursements. (0.11) (0.39) (0.22) 0.23 0.23 1.25 Class B ------------------------------------------------------ Period Ended Years Ended December 31, ------------ ---------------------------------------- 6/30/2004 2003 2002 2001 2000 1999(a) --------- ---- ---- ---- ---- ------- Net asset value, beginning of period.............................. $22.20 $16.07 $ 18.10 $16.18 $13.72 $12.60 Income (loss) from investment operations: Net investment income (loss).................................... (0.10) (0.20) (0.18) (0.06) (0.07) 0.02 Net realized and unrealized gain (loss) on investments.......... 1.16 6.33 (1.85) 2.74 2.53 1.11 ------ ------ ------- ------ ------ ------ Total from investment operations.................................. 1.06 6.13 (2.03) 2.68 2.46 1.13 Less distributions from: Net investment income........................................... -- -- -- -- -- 0.01 Net realized gain............................................... -- -- -- 0.76 -- -- ------ ------ ------- ------ ------ ------ Total distributions............................................... -- -- -- 0.76 -- 0.01 ------ ------ ------- ------ ------ ------ Net asset value, end of period.................................... $23.26 $22.20 $ 16.07 $18.10 $16.18 $13.72 ====== ====== ======= ====== ====== ====== Total return (%).................................................. 4.77 38.15 (11.22) 16.54 17.93 8.95 Ratios to average daily net assets (%) (c): Expenses, net of waivers and reimbursements..................... 2.24 2.33 2.34 2.36 2.39 2.39 Expenses, before waivers and reimbursements..................... 2.24 2.33 2.34 2.41 2.63 2.42 Net investment income (loss), net of waivers and reimbursements. (0.86) (1.14) (0.97) (0.47) (0.27) 0.31 Net investment income (loss), before waivers and reimbursements. (0.86) (1.14) (0.97) (0.52) (0.51) 0.28 ------------------------------------------------------- Period Ended Years Ended December 31, ------------ ------------------------------------------ 6/30/2004 2003 2002 2001 2000 1999 --------- ---- ---- ---- ---- ---- Supplemental data for all classes: Net assets at end of period (in thousands). $263,214 $237,111 $190,802 $149,292 $74,093 $48,423 Portfolio turnover rate (%) (c)............ 36 51 20 48 68 65 - ---------- (a)For the period from November 2, 1999 (Commencement of the Class) to December 31, 1999. (b)For the period November 3, 1999 (Commencement of the Class) to December 31, 1999. (c)Rates are annualized for periods that are less than a year. Note: Net investment income (loss) per share for 2004, 2003, 2002, 2001 and 2000 is based on the average shares outstanding during the period. 72 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- Value Discovery Fund Class C ------------------------------------------------------ Period Ended Years Ended December 31, ------------ ---------------------------------------- 6/30/2004 2003 2002 2001 2000 1999(b) --------- ---- ---- ---- ---- ------- Net asset value, beginning of period.............................. $22.20 $16.07 $ 18.11 $16.19 $13.72 $12.67 Income (loss) from investment operations: Net investment income (loss).................................... (0.10) (0.20) (0.18) (0.06) (0.06) 0.02 Net realized and unrealized gain (loss) on investments.......... 1.17 6.33 (1.86) 2.74 2.53 1.04 ------ ------ ------- ------ ------ ------ Total from investment operations.................................. 1.07 6.13 (2.04) 2.68 2.47 1.06 Less distributions from: Net investment income........................................... -- -- -- -- -- 0.01 Net realized gain............................................... -- -- -- 0.76 -- -- ------ ------ ------- ------ ------ ------ Total distributions............................................... -- -- -- 0.76 -- 0.01 ------ ------ ------- ------ ------ ------ Net asset value, end of period.................................... $23.27 $22.20 $ 16.07 $18.11 $16.19 $13.72 ====== ====== ======= ====== ====== ====== Total return (%).................................................. 4.83 38.15 (11.26) 16.53 18.00 8.37 Ratios to average daily net assets (%): Expenses, net of waivers and reimbursements..................... 2.24 2.33 2.34 2.36 2.39 2.39 Expenses, before waivers and reimbursements..................... 2.24 2.33 2.34 2.41 2.63 2.42 Net investment income (loss), net of waivers and reimbursements. (0.86) (1.14) (0.97) (0.47) (0.37) 1.53 Net investment income (loss), before waivers and reimbursements. (0.86) (1.14) (0.97) (0.52) (0.61) 1.50 ------------------------------------------------------- Period Ended Years Ended December 31, ------------ ------------------------------------------ 6/30/2004 2003 2002 2001 2000 1999 --------- ---- ---- ---- ---- ---- Supplemental data for all classes: Net assets at end of period (in thousands). $263,214 $237,111 $190,802 $149,292 $74,093 $48,423 Portfolio turnover rate (%) (c)............ 36 51 20 48 68 65 - ---------- (a)For the period from November 2, 1999 (Commencement of the Class) to December 31, 1999. (b)For the period November 3, 1999 (Commencement of the Class) to December 31, 1999. (c)Rates are annualized for periods that are less than a year. Note: Net investment income (loss) per share for 2004, 2003, 2002, 2001 and 2000 is based on the average shares outstanding during the period. June 30, 2004 William Blair Funds 73 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- Income Fund Class A -------------------------------------------------- Period Ended Years Ended December 31, ------------ ------------------------------------ 6/30/2004 2003 2002 2001 2000 1999(b) --------- ---- ---- ---- ---- ------- Net asset value, beginning of period..................... $ 6.23 $ 6.40 $ 6.21 $10.37 $ 9.94 $ 9.95 Income (loss) from investment operations: Net investment income (loss) (a)....................... 0.26 0.22 0.32 4.80 0.63 0.07 Net realized and unrealized gain (loss) on investments. (0.29) -- 0.16 (4.16) 0.35 (0.01) ------ ------ ------ ------ ------ ------ Total from investment operations......................... (0.03) 0.22 0.48 0.64 0.98 0.06 Less distributions from: Net investment income.................................. 0.14 0.39 0.29 4.80 0.55 0.07 Net realized gain...................................... -- -- -- -- -- -- ------ ------ ------ ------ ------ ------ Total distributions...................................... 0.14 0.39 0.29 4.80 0.55 0.07 ------ ------ ------ ------ ------ ------ Net asset value, end of period........................... $ 6.06 $ 6.23 $ 6.40 $ 6.21 $10.37 $ 9.94 ====== ====== ====== ====== ====== ====== Total return (%)......................................... (0.50) 3.56 7.86 7.26 10.20 0.63 Ratios to average daily net assets (%) (e): Expenses............................................... 0.76 0.77 0.81 0.94 1.02 0.99 Net investment income (loss)........................... 4.17 4.09 5.23 5.38 6.25 5.78 Class B -------------------------------------------------- Period Ended Years Ended December 31, ------------ ------------------------------------ 6/30/2004 2003 2002 2001 2000 1999(c) --------- ---- ---- ---- ---- ------- Net asset value, beginning of period..................... $10.28 $10.51 $10.24 $10.23 $ 9.94 $10.05 Income (loss) from investment operations: Net investment income (loss) (a)....................... 0.35 0.33 0.47 0.63 0.57 0.06 Net realized and unrealized gain (loss) on investments. (0.43) (0.04) 0.24 0.01 0.32 (0.11) ------ ------ ------ ------ ------ ------ Total from investment operations......................... (0.08) 0.29 0.71 0.64 0.89 (0.05) Less distributions from: Net investment income.................................. 0.20 0.52 0.44 0.63 0.60 0.06 Net realized gain...................................... -- -- -- -- -- -- ------ ------ ------ ------ ------ ------ Total distributions...................................... 0.20 0.52 0.44 0.63 0.60 0.06 ------ ------ ------ ------ ------ ------ Net asset value, end of period........................... $10.00 $10.28 $10.51 $10.24 $10.23 $ 9.94 ====== ====== ====== ====== ====== ====== Total return (%)......................................... (0.77) 2.82 7.15 6.37 9.25 (0.51) Ratios to average daily net assets (%) (e): Expenses............................................... 1.51 1.52 1.56 1.69 1.77 1.77 Net investment income (loss)........................... 3.42 3.34 4.48 4.63 5.38 4.91 --------------------------------------------------------- Period Ended Years Ended December 31, ------------ -------------------------------------------- 6/30/2004 2003 2002 2001 2000 1999 --------- ---- ---- ---- ---- ---- Supplemental data for all classes: Net assets at end of period (in thousands). $267,298 $265,062 $196,136 $176,264 $167,746 $173,375 Portfolio turnover rate (%) (e)............ 36 36 66 82 54 66 - ---------- (a)As required, in 2001, the Fund has adopted the provisions of the AICPA Audit and Accounting Guide for Investment Companies and began treating any paydown gain or losses on mortgage and asset backed securities as an adjustment to income. The effect of this change for the year 2003, was to decrease net investment income per share by $0.12 and increase the net realized and unrealized gain loss per share by $0.12. It decreases the Ratio of Net Investment Income to average net assets from 5.21% to 4.09% for Class A and from 4.46% to 3.34% for Class B and C shares. The effect of this change for the year 2002 and 2001 was to decrease net investment income per share by $.05 and increase the net realized and unrealized gain and loss per share by $.05. It decreases the Ratio of Net Investment Income to Average Net Assets from 5.75% to 5.23% and from 5.87% to 5.38% for Class A for 2002 and 2001, respectively. It decreased the Ratio of Net Investment Income from 5.00% to 4.48% and 5.12% to 4.63% for Class B and C shares for 2002 and 2001, respectively. Per share amounts and the Ratio of Net Investment Income to Average Net Assets for periods prior to December 31, 2001 have not been restated to reflect this change in presentation. (b)For the period October 25, 1999 (Commencement of the Class) to December 31, 1999. (c)For the period November 2, 1999 (Commencement of the Class) to December 31, 1999. (d)For the period November 3, 1999 (Commencement of the Class) to December 31, 1999. (e)Rates are annualized for periods that are less than a year. Note: Net investment income (loss) per share for 2004, 2003, 2002, 2001 and 2000 is based on the average shares outstanding during the period. 74 Semi-Annual Report June 30, 2004 - -------------------------------------------------------------------------------- Financial Highlights - -------------------------------------------------------------------------------- Income Fund Class C ------------------------------------------------- Period Ended Years Ended December 31, ------------ ----------------------------------- 6/30/2004 2003 2002 2001 2000 1999(d) --------- ---- ---- ---- ---- ------- Net asset value, beginning of period..................... $10.43 $10.66 $10.39 $10.27 $ 9.93 $10.06 Income (loss) from investment operations: Net investment income (loss) (a)....................... 0.35 0.33 0.47 0.53 0.53 0.08 Net realized and unrealized gain (loss) on investments. (0.43) (0.03) 0.25 0.12 0.34 (0.13) ------ ------ ------ ------ ------ ------ Total from investment operations......................... (0.08) 0.30 0.72 0.65 0.87 (0.05) Less distributions from: Net investment income.................................. 0.20 0.53 0.45 0.53 0.53 0.08 Net realized gain...................................... -- -- -- -- -- -- ------ ------ ------ ------ ------ ------ Total distributions...................................... 0.20 0.53 0.45 0.53 0.53 0.08 ------ ------ ------ ------ ------ ------ Net asset value, end of period........................... $10.15 $10.43 $10.66 $10.39 $10.27 $ 9.93 ====== ====== ====== ====== ====== ====== Total return (%)......................................... (0.76) 2.85 7.09 6.41 9.05 (0.53) Ratios to average daily net assets (%) (e): Expenses............................................... 1.51 1.52 1.56 1.69 1.77 1.71 Net investment income (loss)........................... 3.42 3.34 4.48 4.63 5.35 5.11 --------------------------------------------------------- Period Ended Years Ended December 31, ------------ -------------------------------------------- 6/30/2004 2003 2002 2001 2000 1999 --------- ---- ---- ---- ---- ---- Supplemental data for all classes: Net assets at end of period (in thousands). $267,298 $265,062 $196,136 $176,264 $167,746 $173,375 Portfolio turnover rate (%) (e)............ 36 36 66 82 54 66 - ---------- (a)As required, in 2001, the Fund has adopted the provisions of the AICPA Audit and Accounting Guide for Investment Companies and began treating any paydown gain or losses on mortgage and asset backed securities as an adjustment to income. The effect of this change for the year 2003, was to decrease net investment income per share by $0.12 and increase the net realized and unrealized gain loss per share by $0.12. It decreases the Ratio of Net Investment Income to average net assets from 5.21% to 4.09% for Class A and from 4.46% to 3.34% for Class B and C shares. The effect of this change for the year 2002 and 2001 was to decrease net investment income per share by $.05 and increase the net realized and unrealized gain and loss per share by $.05. It decreases the Ratio of Net Investment Income to Average Net Assets from 5.75% to 5.23% and from 5.87% to 5.38% for Class A for 2002 and 2001, respectively. It decreased the Ratio of Net Investment Income from 5.00% to 4.48% and 5.12% to 4.63% for Class B and C shares for 2002 and 2001, respectively. Per share amounts and the Ratio of Net Investment Income to Average Net Assets for periods prior to December 31, 2001 have not been restated to reflect this change in presentation. (b)For the period October 25, 1999 (Commencement of the Class) to December 31, 1999. (c)For the period November 2, 1999 (Commencement of the Class) to December 31, 1999. (d)For the period November 3, 1999 (Commencement of the Class) to December 31, 1999. (e)Rates are annualized for periods that are less than a year. Note: Net investment income (loss) per share for 2004, 2003, 2002, 2001 and 2000 is based on the average shares outstanding during the period. June 30, 2004 William Blair Funds 75 Trustees and Officers. The trustees and officers of the William Blair Funds, their ages, their principal occupations during the last five years, their affiliations, if any, with William Blair & Company, L.L.C., and other significant affiliations are set forth below. The address of each trustee and officer is 222 West Adams Street, Chicago, Illinois 60606. Number of Portfolios Term of in Fund Position(s) Office and Principal Complex Held with Length of Occupation(s) Overseen Other Directorships Name and Age Fund Time Served During Past 5 Years by Trustee Held by Trustee/Officer - ------------ ----------- ----------- ------------------------- ---------- --------------------------------------- Interested Trustees Conrad Fischer, 70* Chairman Since 1987 Principal, William Blair 12 Trustee Emeritus, Chicago Child Care of the & Company, L.L.C.; Society, a non-profit organization, and Board of Partner, APM Limited Partner, APM Limited Partnership Trustees Partnership Michelle Seitz, 38* Trustee Since 2002 Principal, William Blair 12 N/A & Company, L.L.C. Non-Interested Trustees J. Grant Beadle, 71 Trustee Since 1997 Retired Chairman and 12 Batts Group and Oliver Products Chief Executive Officer, Company, manufacturer of products Union Special for medical device, food and graphics Corporation, industrial markets. Retired Associate Director, sewing machine Northwestern University Institute for manufacturer The Learning Sciences. Theodore A. Bosler, 69 Trustee Since 1997 Retired Principal and 12 Crystal Lake Watershed Fund, Desert Vice President, Lincoln Foothills Land Trust and Institute of Capital Management Chartered Financial Analysts. Ann P. McDermott, 64 Trustee Since 1996 Board member and 12 Junior League of Chicago, officer for various civic Northwestern University, Women's and charitable Board; Ravinia Festival Women's organizations over the Board; Rush Presbyterian St. Luke's past thirty years; Medical Center, Women's Board; professional experience University of Chicago, Women's prior thereto, registered Board; Visiting Nurses Association, representative for New Honorary Director York Stock Exchange firm John B. Schwemm, 69 Trustee Since 1990 Retired Chairman and 12 USG Corp., building material Chief Executive Officer, manufacturer and Walgreen Co. R.R. Donnelley & Sons Company Donald L. Seeley, 60 Trustee Since 2003 Director, Applied 12 Beverly Enterprises, Inc., provider of Investment Management eldercare and rehabilitative services; Program, University of Modem Media, Inc., interactive Arizona Department of services company Finance, Formerly Vice Chairman and Chief Financial Officer, True North Communications, Inc., marketing communications and advertising firm Robert E. Wood II, 65 Trustee Since 1999 Retired Executive 12 Chairman, Add-Vision, Inc. Vice President, Morgan manufacturer of surface animation Stanley Dean Witter systems and Micro-Combustion, LLC 76 Semi-Annual Report June 30, 2004 Number of Portfolios Term of in Fund Position(s) Office and Principal Complex Held with Length of Occupation(s) Overseen Other Directorships Name and Age Fund Time Served During Past 5 Years by Trustee Held by Trustee/Officer - ------------ ----------- ----------- ------------------------ ---------- ------------------------------- Officers Marco Hanig, 46 President Since 1999 Principal, William Blair N/A N/A & Company, L.L.C.; former Senior Vice President, First Chicago NBD Michael P. Balkin, 45 Senior Since 2000 Principal, William Blair N/A Exceed Corp. Vice & Company, L.L.C. President Rocky Barber, 52 Senior Since 2001 Principal, William Blair N/A YMCA of Metropolitan Chicago Vice & Company, L.L.C. President Chief 1999-2001 Executive Officer Karl W. Brewer, 37 Senior Since 2000 Principal, William Blair N/A N/A Vice & Company, L.L.C. President Harvey H. Bundy, III, 59 Senior Since 2003 Principal, William Blair N/A N/A Vice & Company, L.L.C. President Mark A. Fuller, III, 47 Senior Since 1993 Principal, William Blair N/A Partner, Fulsen Howney Partners Vice & Company, L.L.C. President W. George Greig, 51 Senior Since 1996 Principal, William Blair N/A N/A Vice & Company, L.L.C. President Michael A. Jancosek, 44 Senior Since 2004 Principal, William Blair N/A N/A Vice & Company, L.L.C. President Since 2000 N/A N/A Associate, William Blair Vice & Company, L.L.C.; President former Vice President, First Chicago NBD John F. Jostrand, 50 Senior Since 1999 Principal, William Blair N/A N/A Vice & Company, L.L.C. President James S. Kaplan, 43 Senior Since 2004 Principal, William Blair N/A N/A Vice & Company, L.L.C. President Since 1995 N/A N/A Associate, William Blair Vice & Company, L.L.C. President Robert C. Lanphier, IV, 47 Senior Since 2003 Principal, William Blair N/A Chairman, AG. Med, Inc. Vice & Company, L.L.C. President June 30, 2004 William Blair Funds 77 Number of Portfolios Term of in Fund Position(s) Office and Principal Complex Held with Length of Occupation(s) Overseen Other Directorships Name and Age Fund Time Served During Past 5 Years by Trustee Held by Trustee/Officer - ------------ ----------- ----------- ------------------------ ---------- ----------------------- David S. Mitchell, 44 Senior Since 2004 Principal, William Blair N/A N/A Vice & Company, L.L.C. President Since 2003 N/A N/A Associate, William Blair Vice & Company, L.L.C. President Capucine E. Price, 39 Senior Since 2004 Principal, William Blair N/A N/A Vice & Company, L.L.C. President Since 2003 N/A N/A Associate, William Blair Vice & Company, L.L.C. President Gregory J. Pusinelli, 45 Senior Since 1999 Principal, William Blair N/A N/A Vice & Company, L.L.C.; President former Principal and Vice President, Stein Roe & Farnham Incorporated Norbert W. Truderung, 51 Senior Since 1992 Principal, William Blair N/A N/A Vice & Company, L.L.C. President Jeffrey A. Urbina, 49 Senior Since 1998 Principal, William Blair N/A N/A Vice & Company, L.L.C. President Christopher T. Senior Since 2004 Principal, William Blair N/A Uhlich Children's Home Vincent, 49 Vice & Company, L.L.C. President Since 2002 N/A N/A Associate, William Blair Vice & Company, L.L.C.; President former Managing Director/Senior Portfolio Manager, Zurich Scudder Investments Terence M. Sullivan, 59 Vice Since 1997 Associate, William Blair N/A N/A President & Company, L.L.C. and Treasurer Colette M. Garavalia, 43 Secretary Since 2000 Associate, William Blair N/A N/A & Company, L.L.C.; former Assistant Vice President, Scudder Kemper Investments - ---------- * Mr. Fischer and Ms. Seitz are interested persons of the William Blair Funds because each is a principal of William Blair & Company, L.L.C., the Funds' investment advisor and principal underwriter. 78 Semi-Annual Report June 30, 2004 The Statement of Additional Information for the William Blair Funds includes additional information about the trustees and is available without charge by calling 1-800-635-2886 (in Massachusetts 1-800-635-2840) or by writing the Fund. Proxy Voting A description of the policies and procedures that the Fund uses to determine how to vote proxies relating to portfolio securities and information regarding how the Fund voted proxies relating to portfolio securities for the most recent 12-month period ended June 30 are available without charge, upon request, by calling 1-800-635-2886 (in Massachusetts 1-800-635-2840), at www.williamblairfunds.com and on the SEC's website at http://www.sec.gov. Quarterly Portfolio Schedules The Fund will file its complete schedule of portfolio holdings with the SEC for the first and third fiscal quarters of each fiscal year (quarters ended March 31 and September 30) on Form N-Q. The Fund's Forms N-Q will be available on the SEC's website at http://www.sec.gov and may be reviewed and copied at the SEC's Public Reference Room in Washington, D.C. Information on the operation of the SEC's Public Reference Room may be obtained by calling 1-800-SEC-0330. June 30, 2004 William Blair Funds 79 - -------------------------------------------------------------------------------- BOARD OF TRUSTEES - -------------------------------------------------------------------------------- Conrad Fischer, Chairman Principal, William Blair & Company, L.L.C. J. Grant Beadle Retired Chairman and CEO, Union Special Corporation Theodore A. Bosler Retired Principal and Vice President, Lincoln Capital Management Company Ann P. McDermott Director and Trustee Profit and not-for-profit organizations Donald L. Seeley Adjunct Lecturer and Director, University of Arizona Department of Finance John B. Schwemm Retired Chairman and CEO, R.R. Donnelley & Sons Company Michelle Seitz Principal, William Blair & Company, L.L.C., Robert E. Wood II Retired Executive Vice President, Morgan Stanley Dean Witter - -------------------------------------------------------------------------------- Officers - -------------------------------------------------------------------------------- Marco Hanig, President Michael P. Balkin, Senior Vice President Rocky Barber, Senior Vice President Karl W. Brewer, Senior Vice President Harvey H. Bundy III, Senior Vice President Mark A. Fuller, III, Senior Vice President W. George Greig, Senior Vice President Michael A. Jancosek, Senior Vice President John F. Jostrand, Senior Vice President James S. Kaplan, Senior Vice President Robert C. Lanphier IV, Senior Vice President David S. Mitchell, Senior Vice President Capucine E. Price, Senior Vice President Gregory J. Pusinelli, Senior Vice President Norbert W. Truderung, Senior Vice President Jeffrey A. Urbina, Senior Vice President Christopher T. Vincent, Senior Vice President Terence M. Sullivan, Vice President and Treasurer Colette M. Garavalia, Secretary Investment Advisor William Blair & Company, L.L.C. Legal Counsel Vedder, Price, Kaufman & Kammholz, P.C. Transfer Agent State Street Bank and Trust Company P.O. Box 8506 Boston, MA 02266-8506 For customer assistance, call 1-800-635-2886 (Massachusetts 1-800-635-2840) 80 Date of First Use August, 2004 [LOGO APPEARS HERE] WILLIAM BLAIR FUNDS GROWTH FUNDS Growth Fund Tax-Managed Growth Fund Large Cap Growth Fund Small Cap Growth Fund Small-Mid Cap Growth Fund International Growth Fund International Equity Fund OTHER FUNDS Value Discovery Fund Income Fund 222 West Adams Street . Chicago, Illinois 60606 . 800.742.7272 . www.williamblairfunds.com William Blair & Company, L.L.C., Distributors Item 2. Code of Ethics Not applicable to this filing. Item 3. Audit Committee Financial Expert Not applicable to this filing Item 4. Principal Accountant Fees and Services Not applicable to this filing Item 5. Audit Committee of Listed Registrant Not Applicable to this Registrant, insofar as the Registrant is not a listed company. Item 6. Schedule of Investments Not applicable to this filing Item 7. Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies Not applicable to this Registrant, insofar as the Registrant is not a closed-end management investment company. Item 8. Purchase of Equity Securities by Closed end Management Investment Companies and Affiliated Purchasers Not applicable to this Registrant, insofar as the Registrant is not a closed-end management investment company. Item 9. Submission of Matters to a Vote of Security Holders The Nominating and Governance Committee is responsible for the identification and recommendation of individuals for Board membership. Pursuant to the Registrant's Governance Procedures and Guidelines, other Board members, shareholders and the Registrant's investment adviser may submit suggestions for Board candidates to the Nominating and Governance Committee. Shareholders may submit suggestions for candidates by sending a resume of the candidate to the Secretary of the Registrant for the attention of the Nominating and Governance Committee. Item 10. Controls and Procedures (a) The Registrant's principal executive and principal financial officer, or persons performing similar functions, have concluded that the Registrant's Disclosure Controls and Procedures (as defined in Rule 30-a-3(c) under the Investment Company Act of 1940, as amended (the "1940 Act") (17 CFR 270.30a-3 (c)) are effective, as of a date within 90 days of the filing date of this report that includes the disclosure required by this paragraph, based on their evaluation of these controls and procedures required by Rule 30a-3 (b) under the 1940 Act (17 CFR 270.30a-3(b) and Rules 13a-15(b) or 15d-15(b) under the Exchange Act (17 CFR 240.13a-15(b) or 240.15d-15(b)). (b) There were no changes in the Registrant's internal controls over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act (17 CFR 270.30a-3(d)) that occurred during the Registrant's last fiscal half-year that has materially affected, or is reasonably likely to materially affect, the Registrant's internal control over financial reporting. Item 11. Exhibits Item 11 (a) Code of Ethics Not applicable to this filing 11. (a)(2)(1) Certification of Principal Executive Officer Required by Rule 30a-2(a) of the Investment Company Act 11. (a)(2)(2) Certification of Principal Financial Officer Required by Rule 30a-2(a) of the Investment Company Act. 11. (a)(3) Any written solicitation to purchase securities under Rule 23c-1 under the 40 Act (17 CFR 270.23c-1) sent or given during the period covered by the report by or on behalf of the registrant to 10 or more persons. Not applicable to this Registrant, insofar as the Registrant is not a closed-end management investment company. 11. (b) Certification of Chief Executive Officer and Chief Financial Officer Certification Required by Rule 30a-2(b) of the Investment Company Act 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. William Blair Funds /s/ Marco Hanig ------------------------------------ By: Marco Hanig President Date: August 26, 2004 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. /s/ Marco Hanig ------------------------------------ By: Marco Hanig President Date: August 26, 2004 /s/ Terence M. Sullivan ------------------------------------ By: Terence M. Sullivan Treasurer Date: August 26, 2004