Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
184 institutional managers reported holding LEGN for the quarter ended Mar 31, 2026. Together they hold about 26% of shares outstanding; the top 10 hold 18%. 32 opened new positions; 38 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| FMR (Fidelity) | 25.70M | 6.96% | $464.7M | added +5.9% | 2020 Q2 |
| Deerfield Management Company, L.p. | 7.69M | 2.08% | $139.0M | added +29.6% | 2024 Q4 |
| Suvretta Capital Management, LLC | 7.58M | 2.05% | $137.1M | added +14.7% | 2024 Q4 |
| HHLR Advisors (Hillhouse) (focused) | 5.98M | 1.62% | $108.2M | unchanged | 2020 Q2 |
| Westfield Capital Management CO LP | 5.76M | 1.56% | $104.2M | trimmed -6.5% | 2023 Q2 |
| BlackRock | 4.68M | 1.27% | $84.7M | added +9.5% | 2020 Q2 |
| Point72 | 3.89M | 1.05% | $70.3M | added +39.5% | 2025 Q2 |
| First Beijing Investment LTD (focused) | 2.30M | 0.62% | $41.5M | opened | 2026 Q1 |
| Artisan Partners | 2.25M | 0.61% | $40.8M | trimmed -3.7% | 2021 Q1 |
| Two Sigma | 1.89M | 0.51% | $34.2M | added +259.3% | 2024 Q3 |
| Kynam Capital Management, LP (focused) | 1.58M | 0.43% | $28.5M | opened | 2026 Q1 |
| Acadian Asset Management | 1.53M | 0.41% | $27.6M | added +162.4% | 2025 Q4 |
| State Street | 1.50M | 0.41% | $27.1M | trimmed -1.2% | 2020 Q4 |
| Goldman Sachs | 1.46M | 0.40% | $26.5M | trimmed -32.7% | 2020 Q4 |
| Davern Capital Partners, LP (focused) | 1.31M | 0.36% | $23.8M | added +24.4% | 2025 Q4 |
| Patient Square Capital LP (focused) | 990.0k | 0.27% | $17.9M | opened | 2026 Q1 |
| Matthews International Capital Management LLC (focused) | 925.9k | 0.25% | $16.7M | trimmed -3.2% | 2020 Q2 |
| Hudson Bay Capital | 876.4k | 0.24% | $15.8M | added +52.4% | 2023 Q4 |
| Johnson & Johnson (focused) | 814.6k | 0.22% | $14.7M | unchanged | 2020 Q2 |
| IvyRock Asset Management (HK) LTD (focused) | 804.0k | 0.22% | $14.5M | unchanged | 2024 Q3 |
| ArrowMark Colorado Holdings LLC | 727.1k | 0.20% | $13.2M | added +0.7% | 2020 Q2 |
| Capital International Investors | 647.9k | 0.17% | $11.7M | trimmed -31.2% | 2020 Q2 |
| Triata Capital LTD (focused) | 629.9k | 0.17% | $11.4M | added +149.4% | 2025 Q2 |
| Morgan Stanley | 603.2k | 0.16% | $10.9M | added +25% | 2020 Q2 |
| MFS Investment Management | 574.9k | 0.16% | $10.4M | added +19.7% | 2022 Q4 |
| Geode Capital | 550.1k | 0.15% | $9.9M | trimmed -1% | 2020 Q2 |
| SG Americas Securities, LLC | 535.7k | 0.14% | $9.7M | added +44.1% | 2021 Q4 |
| Renaissance Technologies | 521.8k | 0.14% | $9.4M | added +29.5% | 2024 Q3 |
| Citadel Advisors | 517.0k | 0.14% | $9.3M | added +190.4% | 2020 Q2 |
| Jump Financial | 516.6k | 0.14% | $9.3M | trimmed -1.3% | 2021 Q2 |
| Squarepoint Ops LLC | 479.5k | 0.13% | $8.7M | added +17% | 2021 Q4 |
| Candriam S.c.a. | 470.3k | 0.13% | $8.5M | added +79.6% | 2022 Q3 |
| Arrowstreet Capital | 406.9k | 0.11% | $7.4M | added +343.6% | 2025 Q4 |
| SEI Investments CO | 324.9k | 0.09% | $5.9M | added +215.4% | 2021 Q2 |
| UBS | 305.2k | 0.08% | $5.5M | added +35.9% | 2020 Q2 |
| Empire Life Investments INC. | 301.0k | 0.08% | $5.4M | trimmed -6.8% | 2024 Q2 |
| Marshall Wace | 287.1k | 0.08% | $5.2M | trimmed -62% | 2024 Q3 |
| Millennium Management | 284.9k | 0.08% | $5.2M | added +269.1% | 2020 Q2 |
| Northern Trust | 280.2k | 0.08% | $5.1M | added +1.5% | 2022 Q1 |
| BNP Paribas Financial Markets | 256.7k | 0.07% | $4.6M | trimmed -11.3% | 2024 Q1 |
| Walleye Capital LLC | 248.2k | 0.07% | $4.5M | trimmed -18.5% | 2024 Q1 |
| Legal & General Group PLC | 233.9k | 0.06% | $4.2M | added +3% | 2020 Q4 |
| iA Global Asset Management INC. | 230.6k | 0.06% | $4.2M | added +50.5% | 2024 Q4 |
| Ikarian Capital, LLC | 226.9k | 0.06% | $4.1M | unchanged | 2025 Q4 |
| Y-Intercept (Hong Kong) LTD | 223.3k | 0.06% | $4.0M | opened | 2026 Q1 |
| Hsbc Holdings PLC | 221.5k | 0.06% | $4.0M | trimmed -16.8% | 2021 Q4 |
| XTX Topco LTD | 208.2k | 0.06% | $3.8M | opened | 2026 Q1 |
| Woodline Partners LP | 205.9k | 0.06% | $3.7M | unchanged | 2020 Q2 |
| CenterBook Partners LP | 204.6k | 0.06% | $3.7M | trimmed -4% | 2024 Q2 |
| Russell Investments Group, LTD. | 193.5k | 0.05% | $3.5M | added +10.1% | 2022 Q1 |
Largest 50 of 184 shown; the full ranked, searchable register is at boothcheck.com/holders/LEGN. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.