WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC
Institutional investor · Portfolio as of Q1 2026
Top Holdings413 positions
Stock | Shares | Value | Weight | Avg Buy | Est. P&L | Held | Conviction |
|---|---|---|---|---|---|---|---|
TAIWAN SEMICONDUCTOR SPONSORED ADR /1 ADR REPS 5 ORD SHS/ | 5.5M | $1.9B | 6.2% | $49.26 | +765.42% | 30 qtrssince 2018-Q4 | Decreased 0 |
NVIDIA CORP | 8.9M | $1.6B | 5.2% | $117.25 | +92.03% | 20 qtrssince 2021-Q2 | Decreased 0 |
APPLE INC | 4.8M | $1.2B | 4.0% | $218.09 | +40.28% | 8 qtrssince 2024-Q2 | Decreased 0 |
MICROSOFT CORP | 2.9M | $1.1B | 3.5% | $254.17 | +94.91% | 30 qtrssince 2018-Q4 | Decreased 0 |
ALPHABET INC-CL A | 2.5M | $720.2M | 2.4% | $243.59 | +42.00% | 30 qtrssince 2018-Q4 | Decreased 0 |
BROADCOM INC | 2.2M | $681.4M | 2.3% | $177.43 | +121.49% | 8 qtrssince 2024-Q2 | Decreased 0 |
AMAZON.COM INC | 3.2M | $658.9M | 2.2% | $125.35 | +109.54% | 30 qtrssince 2018-Q4 | Decreased 0 |
META PLATFORMS INC-CLASS A | 1M | $579.6M | 1.9% | $531.25 | +11.03% | 30 qtrssince 2018-Q4 | Decreased 0 |
MASTERCARD INC - A | 1.1M | $530M | 1.8% | $306.90 | +85.50% | 30 qtrssince 2018-Q4 | Decreased 0 |
ASTRAZENECA PLC | 1.9M | $377.3M | 1.2% | $201.76 | -22.46% | 1 qtr | New 71 |
LINDE PLC | 636,338 | $315.5M | 1.0% | $365.32 | +32.14% | 13 qtrssince 2023-Q1 | Decreased 0 |
CARLYLE GROUP INC | 6.3M | $304.9M | 1.0% | $33.04 | +49.13% | 14 qtrssince 2022-Q4 | Decreased 0 |
COSTCO WHOLESALE CORP | 302,468 | $301.4M | 1.0% | $493.35 | +94.81% | 30 qtrssince 2018-Q4 | Decreased 0 |
ITAU UNIBANCO H-SPON PRF ADR | 31.7M | $265.6M | 0.9% | $5.54 | +33.55% | 17 qtrssince 2022-Q1 | Decreased 0 |
Twist Bioscience Corp. | 5.3M | $250.4M | 0.8% | $41.17 | +188.01% | 25 qtrssince 2020-Q1 | Decreased 0 |
SERVICENOW INC | 2.4M | $248M | 0.8% | $146.26 | -15.22% | 12 qtrssince 2023-Q2 | Increased 48 |
PRIMO BRANDS CORP | 13.1M | $245.8M | 0.8% | $28.32 | -12.79% | 6 qtrssince 2024-Q4 | Increased 45 |
MUELLER INDUSTRIES INC | 2.1M | $233.8M | 0.8% | $85.04 | -22.51% | 6 qtrssince 2024-Q4 | Increased 51 |
INTUIT INC | 533,736 | $230.8M | 0.8% | $445.72 | -22.45% | 30 qtrssince 2018-Q4 | Increased 52 |
MONSTER BEVERAGE CORP | 2.9M | $212.7M | 0.7% | $61.53 | -23.90% | 13 qtrssince 2023-Q1 | Decreased 0 |
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC manages $30.3B across 413 positions as of Q1 2026. Top holdings: TSM (6.2%), NVDA (5.2%), AAPL (4.0%). Fund DNA: Steady Compounder. HoldingsIntel Rating: 2.5/5.0.
Active quarter - 47 new positions, 47 exits, 156 increased. Top move: AZN (NEW, conviction 71). Portfolio: $30.3B across 413 positions.
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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