William Blair International Leaders Fund R6 Class Shares

The investment seeks long-term capital appreciation. The fund normally invests primarily in a diversified portfolio of equity securities, including common stocks and other forms of equity investments (e.g., securities convertible into common stocks), issued by companies of all sizes domiciled outside the U.S. that the adviser believes have above-average growth, profitability and quality characteristics. Under normal market conditions, it typically holds a limited number of securities (i.e., 40-70 securities).