WILLIAM BLAIR FUNDS
SUPPLEMENT TO SUMMARY PROSPECTUS DATED MAY 1, 2023
Effective January 22, 2024, the information below replaces similar disclosure in the Summary Prospectus of the William Blair Emerging Markets ex China Growth Fund.
Portfolio Managers. Todd M. McClone and Vivian Lin Thurston, Partners of the Adviser, co-manage the Fund. Mr. McClone and Ms. Lin Thurston have each co-managed the Fund since its inception in 2022.
Dated: January 22, 2024
WILLIAM BLAIR FUNDS
150 North Riverside Plaza
Chicago, Illinois 60606
Please retain this supplement with your Prospectus for future reference.