Additional income dividends were declared on Friday, December 28, 2007 for three William Blair Funds because of unanticipated 2007 ordinary income. The distributions have to be made in order to comply with applicable IRS regulations and to avoid incurring a non-deductible excise tax. The William Blair Funds Class Shares that are subject to these distributions and the amounts of the dividends are as follows:

• Record date: Thursday, December 27, 2007
• Ex-dividend and Reinvestment date: Friday, December 28, 2007
• Payable date: Monday, December 31, 2007

Please note that each Fund’s closing net asset value (NAV) on Friday, December 28, 2007 will be reduced by the amount of the distribution, plus or minus any market activity for the day.

	Income Dividend
Fund Name		Class I	Class N	Institutional
Tax-Managed Growth Fund		$0.01153	None	None
Large Cap Growth Fund		$0.00150	None	None
International Small Cap Growth Fund		$0.00122	$0.00279	$0.00068

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