Form 485BPOS - Post-effective amendment [Rule 485(b)]:
SEC Accession No. 0001193125-26-191656
Filing Date
2026-04-29
Accepted
2026-04-29 16:16:59
Documents
246
Effectiveness Date
2026-05-01

Document Format Files

Seq Description Document Type Size
1 485BPOS d87034d485bpos.htm   iXBRL 485BPOS 5454853
2 EX-99.(H)(V) d87034dex99hv.htm EX-99.(H)(V) 54488
3 EX-99.(I) d87034dex99i.htm EX-99.(I) 9918
4 EX-99.(J) d87034dex99j.htm EX-99.(J) 2765
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  Complete submission text file 0001193125-26-191656.txt   18129031

Data Files

Seq Description Document Type Size
5 XBRL TAXONOMY EXTENSION SCHEMA cik0000822632-20260429.xsd EX-101.SCH 2819159
253 EXTRACTED XBRL INSTANCE DOCUMENT d87034d485bpos_htm.xml XML 1282414

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 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
  Status Name Ticker Symbol
CIK 0000822632      
Series S000080810   William Blair Small-Mid Cap Value Fund
Class/Contract C000243363   Class I ISMVX
Class/Contract C000243364   Class R6 RSMVX
Mailing Address 150 NORTH RIVERSIDE PLAZA CHICAGO IL 60606
Business Address 150 NORTH RIVERSIDE PLAZA CHICAGO IL 60606 3123648000
WILLIAM BLAIR FUNDS (Filer) CIK: 0000822632 (see all company filings)

EIN.: 000000000 | Fiscal Year End: 1231
Type: 485BPOS | Act: 40 | File No.: 811-05344 | Film No.: 26916304

Mailing Address 150 NORTH RIVERSIDE PLAZA CHICAGO IL 60606
Business Address 150 NORTH RIVERSIDE PLAZA CHICAGO IL 60606 3123648000
WILLIAM BLAIR FUNDS (Filer) CIK: 0000822632 (see all company filings)

EIN.: 000000000 | Fiscal Year End: 1231
Type: 485BPOS | Act: 33 | File No.: 033-17463 | Film No.: 26916303