How many stocks does William Blair Investment Management, LLC own?

As of Q2 2026, William Blair Investment Management, LLC holds 403 positions in their 13F portfolio.

What is William Blair Investment Management, LLC's largest holding?

TSM at 7.1% of portfolio, worth $2.4B.

What is William Blair Investment Management, LLC's total portfolio value?

$33.3B as of Q2 2026, tracked across 403 holdings.

Is William Blair Investment Management, LLC a hedge fund?

William Blair Investment Management, LLC is an institutional investment manager required to file SEC 13F reports. This includes hedge funds, mutual funds, pension funds, and other institutions managing over $100M.

How often does William Blair Investment Management, LLC report?

13F filings are due quarterly, approximately 45 days after each quarter end.

How has William Blair Investment Management, LLC's portfolio changed in Q2 2026?

View William Blair Investment Management, LLC's latest portfolio changes, new positions, and exits for Q2 2026 on HoldingsIntel.

What is William Blair Investment Management, LLC's investment strategy?

William Blair Investment Management, LLC is classified as a Balanced Allocator fund based on HoldingsIntel's Fund DNA analysis of 6 behavioral dimensions.

William Blair Investment Management, LLC

Institutional investor · Portfolio as of Q2 2026

Top Holdings403 positions

Checking export access…

Activity:

				Price Trend
TSM ADR Taiwan Semiconductor Manufacturing Company Ltd.	4.9M	$2.4B	7.1%	—	$48.85	+728.58%	31 qtrssince 2018-Q4	Decreased 0
NVDA NVIDIA Corporation	8.6M	$1.7B	5.2%	—	$54.87	+276.70%	21 qtrssince 2021-Q2	Decreased 0
GOOGL Alphabet Inc.	3.2M	$1.1B	3.4%	—	$266.37	+5.13%	31 qtrssince 2018-Q4	Increased 73
AAPL Apple Inc.	3.3M	$943.3M	2.8%	—	$218.09	+52.19%	9 qtrssince 2024-Q2	Decreased 0
AVGO Broadcom Inc.	2.1M	$776.7M	2.3%	—	$173.99	+90.89%	9 qtrssince 2024-Q2	Decreased 0
MSFT Microsoft Corporation	2M	$764.2M	2.3%	—	$252.64	+106.22%	31 qtrssince 2018-Q4	Decreased 0
META Meta Platforms, Inc.	950,115	$535.2M	1.6%	—	$533.72	+16.36%	31 qtrssince 2018-Q4	Decreased 0
AMZN Amazon.com, Inc.	2M	$473.6M	1.4%	—	$129.29	+93.89%	31 qtrssince 2018-Q4	Decreased 0
MA Mastercard Incorporated	918,005	$471.5M	1.4%	—	$304.34	+112.65%	31 qtrssince 2018-Q4	Decreased 0
AMD Advanced Micro Devices, Inc.	763,517	$443.5M	1.3%	—	$163.21	+196.49%	29 qtrssince 2019-Q2	Decreased 0
AMAT Applied Materials, Inc.	497,946	$360M	1.1%	—	$683.70	-44.14%	11 qtrssince 2023-Q4	Increased 79
GE GE Aerospace	790,801	$295.5M	0.9%	—	$372.70	-13.96%	1 qtr	New 60
AZN AstraZeneca PLC	1.5M	$283.2M	0.9%	—	$197.22	-6.76%	2 qtrssince 2026-Q1	Decreased 0
PRMB Primo Brands Corporation	11.4M	$279.3M	0.8%	—	$27.89	-26.18%	7 qtrssince 2024-Q4	Decreased 0
PSTG EVERPURE INC	3.5M	$272.2M	0.8%	—	$61.70	+90.68%	31 qtrssince 2018-Q4	Increased 52
APH Amphenol Corporation	1.5M	$270.7M	0.8%	—	$70.45	+19.51%	2 qtrssince 2026-Q1	Increased 58
LIN Linde plc	504,953	$262M	0.8%	—	$364.04	+40.52%	14 qtrssince 2023-Q1	Decreased 0
ONTO Onto Innovation Inc.	665,377	$251.8M	0.8%	—	$115.04	+75.93%	6 qtrssince 2025-Q1	Decreased 0
BWA BorgWarner Inc.	3.8M	$251.3M	0.8%	—	$56.90	-9.12%	2 qtrssince 2026-Q1	Increased 55
CG The Carlyle Group Inc.	5.9M	$249.1M	0.7%	—	$32.67	+25.20%	15 qtrssince 2022-Q4	Decreased 0

$33.3B

AUM

403

Positions

Q2 2026

Filing

HI rating · 3.5/5

Quarterly 13F Value Change

Reported 13F value ($B)

Reported 13F values and quarter-over-quarter reported value changes; not investment returns.
Quarter	Reported value in US dollars	Reported value change
2025-Q1	$35,621,637,487	-12.989908198%
2025-Q2	$37,679,982,960	5.77835725197%
2025-Q3	$38,674,037,043	2.63814897171%
2025-Q4	$35,851,583,813	-7.29805690278%
2026-Q1	$30,260,249,668	-15.5957800195%
2026-Q2	$33,254,908,063	9.89634397553%