Series and Classes/Contracts Information:
| Existing | |||
| Status | Name | Ticker Symbol | |
| CIK 0000822632 | |||
| Series S000008594 | William Blair Growth Fund | ||
| Class/Contract C000023523 | Class N | WBGSX | |
| Class/Contract C000023524 | Class I | BGFIX | |
| Class/Contract C000211716 | Class R6 | BGFRX | |
| Status | Name | Ticker Symbol | |
| CIK 0000822632 | |||
| Series S000008595 | William Blair International Small Cap Growth Fund | ||
| Class/Contract C000023525 | Class N | WISNX | |
| Class/Contract C000023526 | Class I | WISIX | |
| Class/Contract C000023527 | Class R6 | WIISX | |
| Status | Name | Ticker Symbol | |
| CIK 0000822632 | |||
| Series S000008596 | William Blair Emerging Markets Growth Fund | ||
| Class/Contract C000023528 | Class N | WBENX | |
| Class/Contract C000023529 | Class I | WBEIX | |
| Class/Contract C000023530 | Class R6 | BIEMX | |
| Status | Name | Ticker Symbol | |
| CIK 0000822632 | |||
| Series S000008597 | William Blair Small Cap Value Fund | ||
| Class/Contract C000023531 | Class N | WBVNX | |
| Class/Contract C000023532 | Class I | ICSCX | |
| Class/Contract C000211717 | Class R6 | WBVRX | |
| Status | Name | Ticker Symbol | |
| CIK 0000822632 | |||
| Series S000008601 | William Blair Large Cap Growth Fund | ||
| Class/Contract C000023538 | Class N | LCGNX | |
| Class/Contract C000023539 | Class I | LCGFX | |
| Class/Contract C000211719 | Class R6 | LCGJX | |
| 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 | |
| Status | Name | Ticker Symbol | |
| CIK 0000822632 | |||
| Series S000008603 | William Blair Small-Mid Cap Growth Fund | ||
| Class/Contract C000023542 | Class N | WSMNX | |
| Class/Contract C000023543 | Class I | WSMDX | |
| Class/Contract C000211721 | Class R6 | WSMRX | |
| Status | Name | Ticker Symbol | |
| CIK 0000822632 | |||
| Series S000008604 | William Blair International Growth Fund | ||
| Class/Contract C000023544 | Class N | WBIGX | |
| Class/Contract C000023545 | Class I | BIGIX | |
| Class/Contract C000211722 | Class R6 | WBIRX | |
| Status | Name | Ticker Symbol | |
| CIK 0000822632 | |||
| Series S000008605 | William Blair Institutional International Growth Fund | ||
| Class/Contract C000023546 | Institutional Class | WBIIX | |
| Status | Name | Ticker Symbol | |
| CIK 0000822632 | |||
| Series S000010050 | William Blair Mid Cap Growth Fund | ||
| Class/Contract C000027836 | Class N | WCGNX | |
| Class/Contract C000027837 | Class I | WCGIX | |
| Class/Contract C000211724 | Class R6 | WCGJX | |
| Status | Name | Ticker Symbol | |
| CIK 0000822632 | |||
| Series S000019315 | William Blair Global Leaders Fund | ||
| Class/Contract C000053607 | Class N | WGGNX | |
| Class/Contract C000053608 | Class I | WGFIX | |
| Class/Contract C000053609 | Class R6 | BGGIX | |
| Status | Name | Ticker Symbol | |
| CIK 0000822632 | |||
| Series S000021052 | William Blair Emerging Markets Leaders Fund | ||
| Class/Contract C000059867 | Class I | WBELX | |
| Class/Contract C000059868 | Class R6 | WELIX | |
| Class/Contract C000088850 | Class N | WELNX | |
| Status | Name | Ticker Symbol | |
| CIK 0000822632 | |||
| Series S000034349 | William Blair Emerging Markets Small Cap Growth Fund | ||
| Class/Contract C000105753 | Class I | BESIX | |
| Class/Contract C000105754 | Class N | WESNX | |
| Class/Contract C000105755 | Class R6 | WESJX | |
| Status | Name | Ticker Symbol | |
| CIK 0000822632 | |||
| Series S000037763 | William Blair International Leaders Fund | ||
| Class/Contract C000116468 | Class N | WILNX | |
| Class/Contract C000116469 | Class I | WILIX | |
| Class/Contract C000116470 | Class R6 | WILJX | |
| Status | Name | Ticker Symbol | |
| CIK 0000822632 | |||
| Series S000066499 | William Blair Small-Mid Cap Core Fund | ||
| Class/Contract C000214491 | Class I | WBCIX | |
| Class/Contract C000214492 | Class R6 | WBCRX | |
| Status | Name | Ticker Symbol | |
| CIK 0000822632 | |||
| Series S000069167 | William Blair Emerging Markets Debt Fund | ||
| Class/Contract C000221008 | Class R6 | WEDRX | |
| Class/Contract C000221009 | Class I | WEDIX | |
| Status | Name | Ticker Symbol | |
| CIK 0000822632 | |||
| Series S000072753 | William Blair China Growth Fund | ||
| Class/Contract C000229252 | Class I | WICGX | |
| Class/Contract C000229253 | Class R6 | WRCGX | |
| Status | Name | Ticker Symbol | |
| CIK 0000822632 | |||
| Series S000075390 | William Blair Emerging Markets ex China Growth Fund | ||
| Class/Contract C000234384 | Class I | WXCIX | |
| Class/Contract C000234385 | Class R6 | WXCRX | |
| Status | Name | Ticker Symbol | |
| CIK 0000822632 | |||
| Series S000075391 | William Blair Mid Cap Value Fund | ||
| Class/Contract C000234386 | Class I | WVMIX | |
| Class/Contract C000234387 | Class R6 | WVMRX | |
EIN.: 000000000 | Fiscal Year End: 1231
Type: N-CSR | Act: 40 | File No.: 811-05344 | Film No.: 23668505
