Series and Classes/Contracts Information:
| Existing | |||
| Status | Name | Ticker Symbol | |
| CIK 0000822632 | |||
| Series S000008602 | William Blair Small Cap Growth Fund | ||
| Class/Contract C000023540 | Class N | WBSNX | |
| Class/Contract C000023541 | Class I | WBSIX | |
| Class/Contract C000211720 | Class R6 | WBSRX | |
IRS No.: 000000000 | Fiscal Year End: 1231
Type: NPORT-P | Act: 40 | File No.: 811-05344 | Film No.: 21964420