WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC
Institutional investor · Portfolio as of Q1 2026
Top Holdings413 positions
TAIWAN SEMICONDUCTOR MANUFAC | 5.5M | $1.9B | 6.2% | $48.85 | +588.29% | 30 qtrssince 2018-Q4 | Decreased 0 |
NVIDIA CORPORATION | 8.9M | $1.6B | 5.2% | $54.87 | +217.13% | 20 qtrssince 2021-Q2 | Decreased 0 |
APPLE INC | 4.8M | $1.2B | 4.0% | $218.09 | +16.16% | 8 qtrssince 2024-Q2 | Decreased 0 |
MICROSOFT CORP | 2.9M | $1.1B | 3.5% | $252.64 | +45.93% | 30 qtrssince 2018-Q4 | Decreased 0 |
ALPHABET INC | 2.5M | $720.2M | 2.4% | $241.49 | +18.93% | 30 qtrssince 2018-Q4 | Decreased 0 |
BROADCOM INC | 2.2M | $681.4M | 2.3% | $173.99 | +77.29% | 8 qtrssince 2024-Q2 | Decreased 0 |
AMAZON COM INC | 3.2M | $658.9M | 2.2% | $129.29 | +61.08% | 30 qtrssince 2018-Q4 | Decreased 0 |
META PLATFORMS INC | 1M | $579.6M | 1.9% | $533.72 | +7.01% | 30 qtrssince 2018-Q4 | Decreased 0 |
MASTERCARD INCORPORATED | 1.1M | $530M | 1.8% | $304.80 | +63.38% | 30 qtrssince 2018-Q4 | Decreased 0 |
ASTRAZENECA PLC | 1.9M | $377.3M | 1.2% | $197.22 | 0.00% | 1 qtr | New 71 |
LINDE PLC | 636,338 | $315.5M | 1.0% | $365.32 | +37.33% | 13 qtrssince 2023-Q1 | Decreased 0 |
CARLYLE GROUP INC | 6.3M | $304.9M | 1.0% | $32.67 | +46.01% | 14 qtrssince 2022-Q4 | Decreased 0 |
COSTCO WHOLESALE CORPORATION | 302,468 | $301.4M | 1.0% | $493.35 | +101.36% | 30 qtrssince 2018-Q4 | Decreased 0 |
ITAU UNIBANCO HLDG S A | 31.7M | $265.6M | 0.9% | $5.54 | +49.57% | 17 qtrssince 2022-Q1 | Decreased 0 |
TWIST BIOSCIENCE CORP | 5.3M | $250.4M | 0.8% | $40.90 | +16.20% | 25 qtrssince 2020-Q1 | Decreased 0 |
SERVICENOW INC | 2.4M | $248M | 0.8% | $129.76 | -19.43% | 12 qtrssince 2023-Q2 | Increased 48 |
PRIMO BRANDS CORPORATION | 13.1M | $245.8M | 0.8% | $27.89 | -33.17% | 6 qtrssince 2024-Q4 | Increased 45 |
MUELLER INDS INC | 2.1M | $233.8M | 0.8% | $41.43 | +32.98% | 6 qtrssince 2024-Q4 | Increased 51 |
INTUIT | 533,736 | $230.8M | 0.8% | $442.96 | -3.12% | 30 qtrssince 2018-Q4 | Increased 52 |
MONSTER BEVERAGE CORP NEW | 2.9M | $212.7M | 0.7% | $61.53 | +17.77% | 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: Balanced Allocator. HoldingsIntel Score: 3/5.0.
Active quarter - 47 new positions, 47 exits, 156 increased. Top move: AZN (NEW, conviction 71). Portfolio: $30.3B 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
Verify source filings on SEC EDGAR