WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

CIK 0001644956 · CHICAGO, IL · Quarter end: 2026-06-30 · Filed on: 2026-08-12 · Open the SEC source

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC reported 403 positions worth $33.25B as of June 30, 2026 (13F filed August 12, 2026). Largest holding: TSM (7.1%).

Portfolio Value (AUM)Total value of the fund's US stock portfolio reported to the SEC.
$33.25B
2026 Q2
Positions
403
Top-10 ConcentrationHow much of the portfolio sits in the 10 largest holdings. High = concentrated bets.
28.9%
Est. Net Flow (Q)
2026 Q2
10 / 403 positions shown
#SymbolCompanyTypeValue% Port.Shares1YYTD
1TSMTAIWAN SEMICONDUCTOR MANUFACSH$2.36B7.09%4,936,408
2NVDANVIDIA CORPORATIONSH$1.72B5.17%8,599,021
3GOOGLALPHABET INCSH$1.14B3.43%3,191,012
4AAPLAPPLE INCSH$943.3M2.84%3,259,914
5AVGOBROADCOM INCSH$776.7M2.34%2,056,135
6MSFTMICROSOFT CORPSH$764.2M2.30%2,048,642
7METAMETA PLATFORMS INCSH$535.2M1.61%950,115
8AMZNAMAZON COM INCSH$473.6M1.42%1,987,085
9MAMASTERCARD INCORPORATEDSH$471.5M1.42%918,005
10AMDADVANCED MICRO DEVICES INCSH$443.5M1.33%763,517

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Read the 2026-Q2 quarterly report · 13F Filing Calendar

Frequently Asked Questions

What stocks does WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC hold as of Q2 2026?

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC reported 403 positions worth $33.25B in its Q2 2026 13F filing. Largest positions: TSM (7.1%), NVDA (5.2%), GOOGL (3.4%), AAPL (2.8%) and AVGO (2.3%).

What did WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC buy in Q2 2026?

No previous quarter is available yet; the comparison appears with the next filing.

What did WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC sell in Q2 2026?

No previous quarter is available yet.

13F data shows quarter-end positions, is delayed by up to 45 days and covers only long positions in US-listed securities; short positions, most derivatives and non-US assets are not reported.