William Blair Investment Management
William Blair Investment Management reported 403 stocks worth $33.3B in its 13F filing for Q2 2026, filed Aug 12, 2026. Its largest holdings are TSM (7.1%), NVDA (5.2%) and GOOGL (3.4%). Compared with Q1 2026, the fund opened new positions in GE, CRWD and STX, added to GOOGL, AMAT and P, trimmed TSM, NVDA and AAPL and sold out of COHR, VEEV and DOCS.
Holdings
| # | Stock | Value | Weight | Shares | Change | Shares, 8 qtrs | Held |
|---|---|---|---|---|---|---|---|
| 1 |  TSM Taiwan Semiconductor Mfg Ltd | $2.4B | 7.1% | 4.9M | −582K (−11%) | 8 of 8 | |
| 2 |  NVDA Nvidia Corporation | $1.7B | 5.2% | 8.6M | −343K (−4%) | 8 of 8 | |
| 3 |  GOOGL Alphabet Inc | $1.1B | 3.4% | 3.2M | +686K (+27%) | 8 of 8 | |
| 4 |  AAPL Apple Inc | $943M | 2.8% | 3.3M | −1.6M (−32%) | 8 of 8 | |
| 5 |  AVGO Broadcom Inc | $777M | 2.3% | 2.1M | −145K (−7%) | 8 of 8 | |
| 6 |  MSFT Microsoft Corp | $764M | 2.3% | 2M | −848K (−29%) | 8 of 8 | |
| 7 |  META Meta Platforms Inc | $535M | 1.6% | 950K | −63K (−6%) | 8 of 8 | |
| 8 |  AMZN Amazon Com Inc | $474M | 1.4% | 2M | −1.2M (−37%) | 8 of 8 | |
| 9 |  MA Mastercard Incorporated | $471M | 1.4% | 918K | −143K (−13%) | 8 of 8 | |
| 10 |  AMD Advanced Micro Devices Inc | $444M | 1.3% | 764K | −279K (−27%) | 8 of 8 |
Positions at Jun 30, 2026, as reported. Change is against the fund's Q1 2026 filing; weight is the share of the fund's reported stocks.
Sold out
held in Q1 2026, gone in Q2 2026| Stock | Value last quarter | Shares sold |
|---|---|---|
 COHR Coherent Corp | $159M | 668K |
 VEEV Veeva Sys Inc Class Class A | $113M | 643K |
 DOCS Doximity Inc | $113M | 4.8M |
 PLNT Planet Fitness Inc | $108M | 1.5M |
 POOL Pool Corp | $91.5M | 452K |
🔒 Free account: see all 30.
Reported value
last 8 quartersThe value of the US stocks the fund reported, at quarter end prices. It moves with the market as well as with buying and selling.
Filings for Q2 2026
straight from the SEC| Filed | Form | Quarter | |
|---|---|---|---|
| Aug 12, 2026 | 13F-HR | Q2 2026 | SEC filing ↗ |
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All hedge fund holdings →William Blair Investment Management 13F FAQ
What does William Blair Investment Management own?
William Blair Investment Management reported 403 stocks worth $33.3B in its 13F filing for Q2 2026, filed Aug 12, 2026. Its largest holdings are TSM (7.1%), NVDA (5.2%) and GOOGL (3.4%). The table above lists every position in the filing (the top 10 without an account).
What did William Blair Investment Management buy and sell in Q2 2026?
Compared with Q1 2026: 47 new positions, 118 added to, 230 trimmed and 57 sold out. New positions include GE, CRWD and STX. It sold all of COHR, VEEV and DOCS.
When will William Blair Investment Management file its next 13F?
Holdings as of Sep 30, 2026 are due by Nov 16, 2026. The filing appears on this page within minutes of reaching the SEC.
How much is William Blair Investment Management's portfolio worth?
The Q2 2026 filing reports $33.3B in US stocks. That leaves out cash, bonds, short positions and most foreign holdings, so the fund's total assets are usually larger.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Holdings come from the fund's SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. The fund may have changed its positions since. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.