WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

Est. AUM

$30.26B

13F long equity, this entity only

Positions

413

Period

Mar 2026 (Q1)

SEC EDGAR

View filings ↗

Mar 2026 (Q1)

#	Issuer	Class	Value	Shares	% Portfolio	Discretion
1	TAIWAN SEMICONDUCTOR MANUFAC	SPONSORED ADS	$1.87B	5518260	6.16%	SOLE
2	NVIDIA CORPORATION	COM	$1.56B	8941756	5.15%	SOLE
3	APPLE INC	COM	$1.22B	4812433	4.04%	SOLE
4	MICROSOFT CORP	COM	$1.07B	2896782	3.54%	SOLE
5	ALPHABET INC	CAP STK CL A	$720.2M	2504605	2.38%	SOLE
6	BROADCOM INC	COM	$681.4M	2201558	2.25%	SOLE
7	AMAZON COM INC	COM	$658.9M	3163629	2.18%	SOLE
8	META PLATFORMS INC	CL A	$579.6M	1013122	1.92%	SOLE
9	MASTERCARD INCORPORATED	CL A	$530.0M	1060651	1.75%	SOLE
10	ASTRAZENECA PLC	ORD	$377.3M	1942155	1.25%	SOLE
11	LINDE PLC	SHS	$315.5M	636338	1.04%	SOLE
12	CARLYLE GROUP INC	COM	$304.9M	6301109	1.01%	SOLE
13	COSTCO WHOLESALE CORPORATION	COM	$301.4M	302468	1.00%	SOLE
14	ITAU UNIBANCO HLDG S A	SPON ADR REP PFD	$265.6M	31684708	0.88%	SOLE
15	TWIST BIOSCIENCE CORP	COM	$250.4M	5269718	0.83%	SOLE
16	SERVICENOW INC	COM	$248.0M	2371614	0.82%	SOLE
17	PRIMO BRANDS CORPORATION	CLASS A COM SHS	$245.8M	13056192	0.81%	SOLE
18	MUELLER INDS INC	COM	$233.8M	2109729	0.77%	SOLE
19	INTUIT	COM	$230.8M	533736	0.76%	SOLE
20	MONSTER BEVERAGE CORP NEW	COM	$212.7M	2935247	0.70%	SOLE
21	ADVANCED MICRO DEVICES INC	COM	$212.1M	1042594	0.70%	SOLE
22	CREDICORP LTD	COM	$211.2M	622690	0.70%	SOLE
23	AGILENT TECHNOLOGIES INC	COM	$204.7M	1795764	0.68%	SOLE
24	OREILLY AUTOMOTIVE INC	COM	$204.0M	2210034	0.67%	SOLE
25	BWX TECHNOLOGIES INC	COM	$200.8M	981782	0.66%	SOLE
26	TRANSUNION	COM	$200.0M	2891187	0.66%	SOLE
27	ONTO INNOVATION INC	COM	$197.7M	964213	0.65%	SOLE
28	IDEXX LABS INC	COM	$197.6M	351621	0.65%	SOLE
29	NEXTPOWER INC	CLASS A COM	$195.6M	1622489	0.65%	SOLE
30	ARGENX SE	SPONSORED ADR	$194.4M	266067	0.64%	SOLE
31	CAVA GROUP INC	COM	$193.7M	2393971	0.64%	SOLE
32	LATTICE SEMICONDUCTOR CORP	COM	$189.6M	2043720	0.63%	SOLE
33	F5 INC	COM	$188.0M	649948	0.62%	SOLE
34	AKAMAI TECHNOLOGIES INC	COM	$185.9M	1619060	0.61%	SOLE
35	CAMECO CORP	COM	$182.7M	1682303	0.60%	SOLE
36	UNITEDHEALTH GROUP INC	COM	$182.2M	673263	0.60%	SOLE
37	MADRIGAL PHARMACEUTICALS INC	COM	$178.3M	340519	0.59%	SOLE
38	NU HLDGS LTD	ORD SHS CL A	$176.3M	12267600	0.58%	SOLE
39	GLOBUS MED INC	CL A	$173.2M	2009763	0.57%	SOLE
40	C H ROBINSON WORLDWIDE IN	COM NEW	$173.0M	1041658	0.57%	SOLE
41	EVERPURE INC	CL A	$170.1M	2881481	0.56%	SOLE
42	SNOWFLAKE INC	COM SHS	$170.1M	1127525	0.56%	SOLE
43	TALEN ENERGY CORP	COM	$167.7M	525214	0.55%	SOLE
44	GRAND CANYON ED INC	COM	$166.6M	979734	0.55%	SOLE
45	EVEREST GROUP LTD	COM	$165.4M	506166	0.55%	SOLE
46	HALOZYME THERAPEUTICS INC	COM	$163.3M	2525975	0.54%	SOLE
47	MARTIN MARIETTA MATLS INC	COM	$160.4M	272392	0.53%	SOLE
48	COHERENT CORP	COM	$159.2M	668137	0.53%	SOLE
49	CURTISS WRIGHT CORP	COM	$158.1M	232069	0.52%	SOLE
50	REGAL REXNORD CORPORATION	COM	$156.8M	837493	0.52%	SOLE

1–50 of 413

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