WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC
Institutional investor · Portfolio as of Q4 2025
Top Holdings413 positions
Stock | Shares | Value | Weight | Avg Buy | Est. P&L | Held | Conviction |
|---|---|---|---|---|---|---|---|
NVIDIA CORP | 10.6M | $2B | 5.5% | $117.25 | +59.94% | 19 qtrssince 2021-Q2 | Decreased 0 |
TAIWAN SEMICONDUCTOR SPONSORED ADR /1 ADR REPS 5 ORD SHS/ | 6M | $1.8B | 5.1% | $49.26 | +508.10% | 29 qtrssince 2018-Q4 | Decreased 0 |
MICROSOFT CORP | 3.5M | $1.7B | 4.7% | $254.17 | +91.79% | 29 qtrssince 2018-Q4 | Decreased 0 |
APPLE INC | 5.4M | $1.5B | 4.1% | $218.09 | +24.32% | 7 qtrssince 2024-Q2 | Decreased 0 |
AMAZON.COM INC | 4.4M | $1B | 2.8% | $125.35 | +85.51% | 29 qtrssince 2018-Q4 | Decreased 0 |
ALPHABET INC-CL A | 3.2M | $987.5M | 2.8% | $243.59 | +28.84% | 29 qtrssince 2018-Q4 | Increased 68 |
BROADCOM INC | 2.5M | $877.9M | 2.4% | $174.92 | +97.13% | 7 qtrssince 2024-Q2 | Decreased 0 |
META PLATFORMS INC-CLASS A | 1.2M | $783.4M | 2.2% | $531.25 | +25.36% | 29 qtrssince 2018-Q4 | Increased 54 |
MASTERCARD INC - A | 1.1M | $619.4M | 1.7% | $306.90 | +87.86% | 29 qtrssince 2018-Q4 | Decreased 0 |
CARLYLE GROUP INC | 7.1M | $421.6M | 1.2% | $33.04 | +80.79% | 13 qtrssince 2022-Q4 | Decreased 0 |
TRANSUNION | 4M | $340M | 0.9% | $94.28 | -7.73% | 7 qtrssince 2024-Q2 | Decreased 0 |
MERCADOLIBRE INC | 165,579 | $333.5M | 0.9% | $1,011.82 | +99.73% | 27 qtrssince 2019-Q2 | Decreased 0 |
SERVICENOW INC | 2.1M | $329.2M | 0.9% | $149.68 | +3.04% | 11 qtrssince 2023-Q2 | Increased 70 |
NU HOLDINGS LTD/CAYMAN ISL-A | 18.7M | $313M | 0.9% | $13.98 | +20.70% | 9 qtrssince 2023-Q4 | Decreased 0 |
SEA LTD-ADR | 2.4M | $302.4M | 0.8% | $110.55 | +8.05% | 6 qtrssince 2024-Q3 | Decreased 0 |
IDEXX LABORATORIES INC | 441,324 | $298.6M | 0.8% | $416.21 | +63.94% | 29 qtrssince 2018-Q4 | Decreased 0 |
SNOWFLAKE INC-CLASS A | 1.3M | $295.5M | 0.8% | $223.28 | -0.55% | 2 qtrssince 2025-Q3 | Increased 70 |
INTUIT INC | 442,391 | $293M | 0.8% | $448.27 | +49.16% | 29 qtrssince 2018-Q4 | Decreased 0 |
MONSTER BEVERAGE CORP | 3.8M | $288.4M | 0.8% | $61.53 | +24.62% | 12 qtrssince 2023-Q1 | Increased 53 |
ADVANCED MICRO DEVICES | 1.3M | $286.9M | 0.8% | $163.21 | +31.22% | 27 qtrssince 2019-Q2 | Increased 54 |
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC manages $35.9B across 413 positions as of Q4 2025. Top holdings: NVDA (5.5%), TSM (5.1%), MSFT (4.7%). Fund DNA: Momentum Trader. HoldingsIntel Rating: 2/5.0.
Active quarter - 45 new positions, 46 exits, 107 increased. Top move: NOW (INCREASED, conviction 70). Portfolio: $35.9B across 413 positions.
Top holdings by portfolio weight
Portfolio allocation by GICS sector
Behavioral investing profile
Position Outcomes
Best and worst performing positions by estimated return
Top Winners
Top Losers
Cost basis estimates based on full filing history using quarter-end prices. Actual transaction prices are not disclosed in 13F filings.
Similar Funds
Funds with similar investing DNA
Explore More
Accumulation Streaks
Positions with 2+ consecutive quarters of increases - persistent directional conviction.
Continue exploring
Data sourced from SEC EDGAR 13F filings. Not financial advice. Full disclaimer