SEC Form 13F

BLAIR WILLIAM & CO/IL 13F Holdings

Inspect BLAIR WILLIAM & CO/IL's 2026-06-30 SEC 13F positions, public filing date, amendments and original receipt.

As of 2026-08-12T03:59:59.999Z

Report period
2026-06-30
Publicly available
2026-08-12
Reported value
$38,388,159,607
Positions
1,998

Disclosed positions

APPLE INCAAPLCOM$1,658,473,9625,731,525SHNone
AMAZON COM INCAMZNCOM$1,400,277,0065,875,124SHNone
MICROSOFT CORPMSFTCOM$1,284,149,0263,442,574SHNone
NVIDIA CORPORATIONNVDACOM$1,075,368,5615,374,424SHNone
ALPHABET INCGOOGCAP STK CL C$1,043,639,1862,953,724SHNone
ALPHABET INCGOOGLCAP STK CL A$858,624,7022,402,621SHNone
GE VERNOVA INCGEVCOM$775,022,876659,673SHNone
JPMORGAN CHASE & COJPMCOM$743,156,8222,270,360SHNone
STATE STR SPDR S&P 500 ETF TSPYTR UNIT$633,286,009848,034SHNone
VISA INCVCOM CL A$631,835,9211,841,604SHNone
COSTCO WHOLESALE CORPORATIONCOSTCOM$490,833,719524,692SHNone
IDEXX LABS INCIDXXCOM$483,564,860918,556SHNone
AMPHENOL CORPAPHCL A$441,577,3192,504,409SHNone
MASTERCARD INCORPORATEDMACL A$432,630,792842,350SHNone
INVESCO EXCHANGE TRADED FD TRSPS&P500 EQL WGT$421,793,4851,982,392SHNone
PALO ALTO NETWORKS INCPANWCOM$418,267,5661,226,519SHNone
ELI LILLY & COLLYCOM$416,319,968347,098SHNone
META PLATFORMS INCMETACL A$377,900,414670,881SHNone
VANGUARD INTL EQUITY INDEX FVEUALLWRLD EX US$375,134,5154,479,218SHNone
MICRON TECHNOLOGY INCMUCOM$364,615,192315,878SHNone
ISHARES TRIVVCORE S&P500 ETF$362,990,262484,704SHNone
FASTENAL COFASTCOM$355,761,0407,407,059SHNone
BROADCOM INCAVGOCOM$351,200,187929,716SHNone
ABBVIE INCABBVCOM$324,076,4561,287,857SHNone
VANGUARD TAX-MANAGED FDSVEAVAN FTSE DEV MKT$305,735,3674,291,023SHNone
BWX TECHNOLOGIES INCBWXTCOM$302,956,5571,556,417SHNone
VANGUARD INDEX FDSVOOS&P 500 ETF SHS$288,028,908419,372SHNone
ARISTA NETWORKS INCANETCOM SHS$272,609,1531,604,716SHNone
VANGUARD INDEX FDSVTVVALUE ETF$268,598,0321,232,497SHNone
INVESCO QQQ TRQQQUNIT SER 1$264,528,652359,219SHNone
WALMART INCWMTCOM$257,199,7812,270,879SHNone
HOME DEPOT INCHDCOM$246,025,938697,590SHNone
JOHNSON & JOHNSONJNJCOM$242,861,932956,262SHNone
BERKSHIRE HATHAWAY INC DELBRK.BCL B NEW$241,981,741483,586SHNone
EVERPURE INCPCL A$240,159,3083,048,094SHNone
ECOLAB INCECLCOM$238,014,780854,294SHNone
WATSCO INCWSOCOM$235,045,592564,024SHNone
AMERICAN EXPRESS COAXPCOM$230,118,643680,321SHNone
PROGRESSIVE CORPPGRCOM$225,900,0971,034,104SHNone
SERVICENOW INCNOWCOM$222,390,1772,240,030SHNone
TRANSDIGM GROUP INCTDGCOM$219,733,476164,960SHNone
STRYKER CORPORATIONSYKCOM$215,474,067684,392SHNone
ISHARES TRIWMRUSSELL 2000 ETF$210,630,787701,051SHNone
CROWDSTRIKE HLDGS INCCRWDCL A$207,753,341272,235SHNone
UBER TECHNOLOGIES INCUBERCOM$201,657,6212,794,590SHNone
VANGUARD INDEX FDSVTITOTAL STK MKT$195,575,374528,525SHNone
AAON INCAAONCOM PAR $0.004$194,531,3881,533,434SHNone
BOEING COBACOM$190,146,384878,396SHNone
DANAHER CORP DELDHRCOM$184,974,108971,095SHNone
CINTAS CORPCTASCOM$180,885,1571,063,530SHNone

Largest 50 positions by reported value; the filing may contain more positions.

How amendments affect these holdings

This view uses 1 effective filing version(s). A restatement replaces the previous book; a new-holdings amendment adds positions. 11 positions lack a resolved ticker and 0 positions are put or call entries.

A 13F is a delayed quarterly snapshot of disclosed holdings. It is not a complete trade ledger and does not reveal every position in a manager's portfolio. Option values refer to the reported underlying position rather than a traded option premium.

Quarter end and public filing date

Use the filing's public availability date when constructing a historical observation. The quarter-end report period is earlier and cannot be substituted for when the public learned the holdings.