| William Blair Growth Fund | Class N | WBGSX | — |
| William Blair Growth Fund | Class I | BGFIX | — |
| William Blair International Small Cap Growth Fund | Class N | WISNX | — |
| William Blair International Small Cap Growth Fund | Class I | WISIX | — |
| William Blair International Small Cap Growth Fund | Institutional Class | WIISX | — |
| William Blair Emerging Markets Growth Fund | Class N | WBENX | — |
| William Blair Emerging Markets Growth Fund | Class I | WBEIX | — |
| William Blair Emerging Markets Growth Fund | Institutional Class | BIEMX | — |
| William Blair Value Discovery Fund | Class N | WBVDX | — |
| William Blair Value Discovery Fund | Class I | BVDIX | — |
| William Blair Income Fund | Class N | WBRRX | — |
| William Blair Income Fund | Class I | BIFIX | — |
| William Blair Ready Reserves Fund | Class N | WBRXX | — |
| William Blair Tax-Managed Growth Fund | Class N | BTMNX | — |
| William Blair Tax-Managed Growth Fund | Class I | BTMIX | — |
| William Blair Large Cap Growth Fund | Class N | LCGNX | — |
| William Blair Large Cap Growth Fund | Class I | LCGIY | — |
| William Blair Small Cap Growth Fund | Class N | WBSNX | — |
| William Blair Small Cap Growth Fund | Class I | WBSIX | — |
| William Blair Small-Mid Cap Growth Fund | Class N | WSMNX | — |
| William Blair Small-Mid Cap Growth Fund | Class I | WSMDX | — |
| William Blair International Growth Fund | Class N | WBIGX | — |
| William Blair International Growth Fund | Class I | BIGIX | — |
| William Blair Institutional International Growth Fund | Institutional Class | WBIIX | — |
| William Blair International Equity Fund | Class N | WIENX | — |