BLAIR WILLIAM & CO/IL

Est. AUM

$34.90B

13F long equity, this entity only

Positions

1,922

Period

Mar 2026 (Q1)

SEC EDGAR

View filings ↗

Mar 2026 (Q1)

#	Issuer	Class	Value	Shares	% Portfolio	Discretion
1	APPLE INC	COM	$1.51B	5930914	4.31%	SOLE
2	MICROSOFT CORP	COM	$1.29B	3498110	3.71%	SOLE
3	AMAZON COM INC	COM	$1.26B	6057938	3.62%	SOLE
4	NVIDIA CORPORATION	COM	$946.6M	5427875	2.71%	SOLE
5	ALPHABET INC	CAP STK CL C	$870.8M	3035765	2.50%	SOLE
6	ALPHABET INC	CAP STK CL A	$700.5M	2436117	2.01%	SOLE
7	JPMORGAN CHASE & CO	COM	$678.7M	2307253	1.94%	SOLE
8	GE VERNOVA INC	COM	$580.1M	664603	1.66%	SOLE
9	VISA INC	COM CL A	$557.5M	1844583	1.60%	SOLE
10	STATE STR SPDR S&P 500 ETF T	TR UNIT	$549.7M	845294	1.58%	SOLE
11	IDEXX LABS INC	COM	$531.7M	946336	1.52%	SOLE
12	COSTCO WHOLESALE CORPORATION	COM	$519.4M	521277	1.49%	SOLE
13	MASTERCARD INCORPORATED	CL A	$461.4M	923405	1.32%	SOLE
14	META PLATFORMS INC	CL A	$412.9M	721720	1.18%	SOLE
15	FASTENAL CO	COM	$342.1M	7373707	0.98%	SOLE
16	INVESCO EXCHANGE TRADED FD T	S&P500 EQL WGT	$322.5M	1680604	0.92%	SOLE
17	AMPHENOL CORP	CL A	$318.4M	2520319	0.91%	SOLE
18	ISHARES TR	CORE S&P500 ETF	$317.4M	485839	0.91%	SOLE
19	VANGUARD INTL EQUITY INDEX F	ALLWRLD EX US	$313.1M	4168625	0.90%	SOLE
20	ELI LILLY & CO	COM	$298.0M	324018	0.85%	SOLE
21	WALMART INC	COM	$295.1M	2374282	0.85%	SOLE
22	BWX TECHNOLOGIES INC	COM	$294.1M	1438125	0.84%	SOLE
23	ABBVIE INC	COM	$290.2M	1334109	0.83%	SOLE
24	BROADCOM INC	COM	$284.2M	918328	0.81%	SOLE
25	STRYKER CORPORATION	COM	$278.5M	847701	0.80%	SOLE
26	INTERCONTINENTAL EXCHANGE IN	COM	$250.6M	1593628	0.72%	SOLE
27	HOME DEPOT INC	COM	$250.4M	761419	0.72%	SOLE
28	VANGUARD TAX-MANAGED FDS	VAN FTSE DEV MKT	$247.5M	3862086	0.71%	SOLE
29	DANAHER CORP DEL	COM	$245.9M	1296804	0.70%	SOLE
30	PROGRESSIVE CORP	COM	$241.8M	1219749	0.69%	SOLE
31	VANGUARD INDEX FDS	S&P 500 ETF SHS	$237.5M	397380	0.68%	SOLE
32	BERKSHIRE HATHAWAY INC DEL	CL B NEW	$237.4M	495322	0.68%	SOLE
33	UBER TECHNOLOGIES INC	COM	$237.3M	3299596	0.68%	SOLE
34	JOHNSON & JOHNSON	COM	$233.6M	955632	0.67%	SOLE
35	ECOLAB INC	COM	$230.5M	866411	0.66%	SOLE
36	VANGUARD INDEX FDS	VALUE ETF	$228.8M	1165912	0.66%	SOLE
37	WATSCO INC	COM	$212.0M	582700	0.61%	SOLE
38	AMERICAN EXPRESS CO	COM	$209.9M	693767	0.60%	SOLE
39	PALO ALTO NETWORKS INC	COM	$209.2M	1304858	0.60%	SOLE
40	INTUITIVE SURGICAL INC	COM NEW	$196.0M	425228	0.56%	SOLE
41	TRANSDIGM GROUP INC	COM	$192.7M	166248	0.55%	SOLE
42	SERVICENOW INC	COM	$188.3M	1800988	0.54%	SOLE
43	VEEVA SYS INC	CL A COM	$187.5M	1067576	0.54%	SOLE
44	BOEING CO	COM	$183.5M	922102	0.53%	SOLE
45	INVESCO QQQ TR	UNIT SER 1	$179.5M	311016	0.51%	SOLE
46	EVERPURE INC	CL A	$172.3M	2918046	0.49%	SOLE
47	NETFLIX INC.	COM	$169.6M	1763451	0.49%	SOLE
48	SPDR GOLD TR	GOLD SHS	$166.4M	386735	0.48%	SOLE
49	CINTAS CORP	COM	$164.7M	973553	0.47%	SOLE
50	EXXON MOBIL CORP	COM	$160.6M	946386	0.46%	SOLE

1–50 of 1,922

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Values in USD (reported in $thousands on 13F). Source: SEC EDGAR.