WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC
Institutional investor · Portfolio as of Q2 2025
Top Holdings417 positions
Stock | Shares | Value | Weight | Avg Buy | Est. P&L | Held | Conviction |
|---|---|---|---|---|---|---|---|
MICROSOFT CORP | 4M | $2B | 5.3% | $254.17 | +94.43% | 27 qtrssince 2018-Q4 | Decreased 0 |
NVIDIA CORP | 12.3M | $1.9B | 5.1% | $117.25 | +34.52% | 17 qtrssince 2021-Q2 | Increased 62 |
TAIWAN SEMICONDUCTOR SPONSORED ADR /1 ADR REPS 5 ORD SHS/ | 6.6M | $1.5B | 4.0% | $49.26 | +361.26% | 27 qtrssince 2018-Q4 | Decreased 0 |
AMAZON.COM INC | 5.4M | $1.2B | 3.1% | $125.35 | +78.14% | 27 qtrssince 2018-Q4 | Decreased 0 |
APPLE INC | 5.3M | $1.1B | 2.9% | $215.60 | -5.30% | 5 qtrssince 2024-Q2 | Increased 55 |
META PLATFORMS INC-CLASS A | 1.4M | $1.1B | 2.8% | $531.18 | +37.91% | 27 qtrssince 2018-Q4 | Decreased 0 |
BROADCOM INC | 3M | $815.7M | 2.2% | $177.43 | +51.26% | 5 qtrssince 2024-Q2 | Decreased 0 |
MASTERCARD INC - A | 1.2M | $685.7M | 1.8% | $306.90 | +78.57% | 27 qtrssince 2018-Q4 | Increased 50 |
MERCADOLIBRE INC | 238,599 | $623.6M | 1.7% | $1,011.82 | +153.02% | 25 qtrssince 2019-Q2 | Decreased 0 |
SEA LTD-ADR | 3.6M | $574M | 1.5% | $110.55 | +44.10% | 4 qtrssince 2024-Q3 | Decreased 0 |
CARLYLE GROUP INC | 9.9M | $511.4M | 1.4% | $33.04 | +51.98% | 11 qtrssince 2022-Q4 | Decreased 0 |
TRANSUNION | 4.7M | $417M | 1.1% | $94.28 | -7.70% | 5 qtrssince 2024-Q2 | Increased 66 |
INTUIT INC | 517,131 | $407.3M | 1.1% | $448.27 | +72.37% | 27 qtrssince 2018-Q4 | Decreased 0 |
COSTCO WHOLESALE CORP | 376,485 | $372.7M | 1.0% | $486.86 | +101.87% | 27 qtrssince 2018-Q4 | Increased 47 |
IDEXX LABORATORIES INC | 685,088 | $367.4M | 1.0% | $416.21 | +27.66% | 27 qtrssince 2018-Q4 | Increased 47 |
SERVICENOW INC | 350,569 | $360.4M | 1.0% | $124.10 | +64.78% | 9 qtrssince 2023-Q2 | Decreased 0 |
CHIPOTLE MEXICAN GRILL INC | 6.3M | $352.4M | 0.9% | $60.23 | -8.60% | 16 qtrssince 2021-Q3 | Decreased 0 |
TALEN ENERGY CORP | 1.1M | $320.4M | 0.9% | $201.66 | +47.71% | 3 qtrssince 2024-Q4 | Decreased 0 |
DOXIMITY INC-CLASS A | 5.2M | $320.2M | 0.8% | $31.34 | +94.94% | 6 qtrssince 2024-Q1 | Increased 50 |
O'REILLY AUTOMOTIVE INC | 3.5M | $319.4M | 0.8% | $87.39 | +2.02% | 11 qtrssince 2022-Q4 | Increased 70 |
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC manages $37.7B across 417 positions as of Q2 2025. Top holdings: MSFT (5.3%), NVDA (5.1%), TSM (4.0%). Fund DNA: Momentum Trader. HoldingsIntel Rating: 2/5.0.
Active quarter - 38 new positions, 44 exits, 118 increased. Top move: ORLY (INCREASED, conviction 70). Portfolio: $37.7B across 417 positions.
Top holdings by portfolio weight
Portfolio allocation by GICS sector
Behavioral investing profile
Position Outcomes
Best and worst performing positions by estimated return
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Cost basis estimates based on full filing history using quarter-end prices. Actual transaction prices are not disclosed in 13F filings.
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Data sourced from SEC EDGAR 13F filings. Not financial advice. Full disclaimer