WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC
Institutional investor · Portfolio as of Q2 2026
Top Holdings403 positions
Stock | Shares | Value | Weight | Avg Buy | Est. P&L | Held | Conviction |
|---|---|---|---|---|---|---|---|
TAIWAN SEMICONDUCTOR SPONSORED ADR /1 ADR REPS 5 ORD SHS/ | 4.9M | $2.4B | 7.1% | $49.26 | +747.85% | 31 qtrssince 2018-Q4 | Decreased 0 |
NVIDIA CORP | 8.6M | $1.7B | 5.2% | $117.25 | +78.81% | 21 qtrssince 2021-Q2 | Decreased 0 |
ALPHABET INC-CL A | 3.2M | $1.1B | 3.4% | $268.07 | +27.58% | 31 qtrssince 2018-Q4 | Increased 73 |
APPLE INC | 3.3M | $943.3M | 2.8% | $218.09 | +43.73% | 9 qtrssince 2024-Q2 | Decreased 0 |
BROADCOM INC | 2.1M | $776.7M | 2.3% | $174.92 | +103.28% | 9 qtrssince 2024-Q2 | Decreased 0 |
MICROSOFT CORP | 2M | $764.2M | 2.3% | $252.64 | +96.47% | 31 qtrssince 2018-Q4 | Decreased 0 |
META PLATFORMS INC-CLASS A | 950,115 | $535.2M | 1.6% | $531.25 | +8.45% | 31 qtrssince 2018-Q4 | Decreased 0 |
AMAZON.COM INC | 2M | $473.6M | 1.4% | $125.35 | +107.65% | 31 qtrssince 2018-Q4 | Decreased 0 |
MASTERCARD INC - A | 918,005 | $471.5M | 1.4% | $306.90 | +95.00% | 31 qtrssince 2018-Q4 | Decreased 0 |
ADVANCED MICRO DEVICES | 763,517 | $443.5M | 1.3% | $163.21 | +194.67% | 29 qtrssince 2019-Q2 | Decreased 0 |
APPLIED MATERIALS INC | 497,946 | $360M | 1.1% | $684.43 | -29.90% | 11 qtrssince 2023-Q4 | Increased 79 |
GENERAL ELECTRIC CO COM STOCK | 790,801 | $295.5M | 0.9% | $373.26 | -5.06% | 1 qtr | New 60 |
ASTRAZENECA PLC | 1.5M | $283.2M | 0.9% | $197.22 | -15.69% | 2 qtrssince 2026-Q1 | Decreased 0 |
PRIMO BRANDS CORP | 11.4M | $279.3M | 0.8% | $27.89 | -17.61% | 7 qtrssince 2024-Q4 | Decreased 0 |
PURE STORAGE INC - CLASS A | 3.5M | $272.2M | 0.8% | $58.41 | — | 31 qtrssince 2018-Q4 | Increased 52 |
AMPHENOL CORP-CL A | 1.5M | $270.7M | 0.8% | $141.11 | +14.33% | 2 qtrssince 2026-Q1 | Increased 58 |
LINDE PLC | 504,953 | $262M | 0.8% | $365.32 | +34.22% | 14 qtrssince 2023-Q1 | Decreased 0 |
ONTO INNOVATION INC | 665,377 | $251.8M | 0.8% | $114.64 | +154.61% | 6 qtrssince 2025-Q1 | Decreased 0 |
BORGWARNER INC | 3.8M | $251.3M | 0.8% | $57.05 | +13.39% | 2 qtrssince 2026-Q1 | Increased 55 |
CARLYLE GROUP INC | 5.9M | $249.1M | 0.7% | $32.67 | +49.97% | 15 qtrssince 2022-Q4 | Decreased 0 |
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC manages $33.3B across 403 positions as of Q2 2026. Top holdings: TSM (7.1%), NVDA (5.2%), GOOGL (3.4%). Fund DNA: Balanced Allocator. HoldingsIntel Score: 3.5/5.0.
Active quarter - 47 new positions, 57 exits, 119 increased. Top move: AMAT (INCREASED, conviction 79). Portfolio: $33.3B across 403 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
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