Who owns LEGN
Which tracked institutional funds hold LEGN, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See LEGN company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on LEGN is one-sided between 2026-Q1 and 2026-Q2: 97 added or opened and 28 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
LEGN’s largest tracked holder by dollar value, FMR LLC, sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in LEGN divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 208 tracked filers holding LEGN, 114 increased or opened the position and 111 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in LEGN between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 25
- Assenagon Asset Management S.A.$55M
- Soleus Capital Management, L.P.$35M
- Driehaus Capital Management LLC$33M
- Ghisallo Capital Management LLC$29M
- EcoR1 Capital, LLC$23M
- ADAGE CAPITAL PARTNERS GP, L.L.C.$17M
Full exits 16
- First Beijing Investment Ltd$42M
- ACADIAN ASSET MANAGEMENT LLC$28M
- Patient Square Capital LP$18M
- SG Americas Securities, LLC$10M
- Jump Financial, LLC$9M
- MILLENNIUM MANAGEMENT LLC$5M
Largest adds
- FMR LLC$389M
- DEERFIELD MANAGEMENT COMPANY, L.P.$96M
- GOLDMAN SACHS GROUP INC$79M
- MONTANOVA CAPITAL, LLC$67M
- HHLR ADVISORS, LTD.$65M
- Kynam Capital Management, LP$58M
Largest trims
- TWO SIGMA INVESTMENTS, LP$29M
- Hudson Bay Capital Management LP$6M
- CITADEL ADVISORS LLC$6M
- SEI INVESTMENTS CO$5M
- Y-Intercept (Hong Kong) Ltd$3M
- Russell Investments Group, Ltd.$3M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| FMR LLC added | 29,093,899 | $840M | 28.6% | 2026-Q2 |
| DEERFIELD MANAGEMENT COMPANY, L.P. added | 8,137,638 | $235M | 8.0% | 2026-Q2 |
| MONTANOVA CAPITAL, LLC trimmed | 7,070,000 | $204M | 7.0% | 2026-Q2 |
| HHLR ADVISORS, LTD. | 5,984,550 | $173M | 5.9% | 2026-Q2 |
| BlackRock, Inc. added | 4,726,534 | $137M | 4.6% | 2026-Q2 |
| WESTFIELD CAPITAL MANAGEMENT CO LP trimmed | 4,430,063 | $128M | 4.4% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 3,662,315 | $106M | 3.6% | 2026-Q2 |
| Point72 Asset Management, L.P. trimmed | 3,076,124 | $89M | 3.0% | 2026-Q2 |
| Kynam Capital Management, LP added | 3,001,205 | $87M | 3.0% | 2026-Q2 |
| Assenagon Asset Management S.A. new | 1,915,056 | $55M | 1.9% | 2026-Q2 |
| Artisan Partners Limited Partnership trimmed | 1,559,441 | $45M | 1.5% | 2026-Q2 |
| STATE STREET CORP added | 1,498,704 | $43M | 1.5% | 2026-Q2 |
| Capital International Investors added | 1,420,654 | $41M | 1.4% | 2026-Q2 |
| MORGAN STANLEY added | 1,394,531 | $40M | 1.4% | 2026-Q2 |
| Soleus Capital Management, L.P. new | 1,205,000 | $35M | 1.2% | 2026-Q2 |
| Davern Capital Partners, LP trimmed | 1,191,522 | $34M | 1.2% | 2026-Q2 |
| Driehaus Capital Management LLC new | 1,158,808 | $33M | 1.1% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC added | 1,000,200 | $29M | 1.0% | 2026-Q2 |
| Ghisallo Capital Management LLC new | 1,000,000 | $29M | 1.0% | 2026-Q2 |
| MATTHEWS INTERNATIONAL CAPITAL MANAGEMENT LLC trimmed | 917,266 | $26M | 0.9% | 2026-Q2 |
| JOHNSON & JOHNSON | 814,586 | $24M | 0.8% | 2026-Q2 |
| IvyRock Asset Management (HK) Ltd trimmed | 801,000 | $23M | 0.8% | 2026-Q2 |
| EcoR1 Capital, LLC new | 800,000 | $23M | 0.8% | 2026-Q2 |
| Squarepoint Ops LLC added | 769,252 | $22M | 0.8% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 766,364 | $23M | 0.8% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 759,994 | $22M | 0.7% | 2026-Q2 |
| Woodline Partners LP added | 663,086 | $19M | 0.7% | 2026-Q2 |
| Triata Capital Ltd | 629,914 | $18M | 0.6% | 2026-Q2 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. new | 600,000 | $17M | 0.6% | 2026-Q2 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ trimmed | 574,685 | $17M | 0.6% | 2026-Q2 |
| Elmind Capital, LP new | 570,569 | $16M | 0.6% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 563,489 | $16M | 0.6% | 2026-Q2 |
| Candriam S.C.A. added | 504,924 | $15M | 0.5% | 2026-Q2 |
| UBS Group AG added | 502,466 | $15M | 0.5% | 2026-Q2 |
| CenterBook Partners LP added | 452,907 | $13M | 0.4% | 2026-Q2 |
| ArrowMark Colorado Holdings LLC trimmed | 362,781 | $10M | 0.4% | 2026-Q2 |
| Hudson Bay Capital Management LP trimmed | 340,000 | $10M | 0.3% | 2026-Q2 |
| Alyeska Investment Group, L.P. added | 307,474 | $9M | 0.3% | 2026-Q2 |
| Empire Life Investments Inc. trimmed | 296,586 | $9M | 0.3% | 2026-Q2 |
| NORTHERN TRUST CORP trimmed | 274,856 | $8M | 0.3% | 2026-Q2 |
| Resolute Capital Asset Partners LLC added | 260,871 | $8M | 0.3% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 251,449 | $7M | 0.2% | 2026-Q2 |
| Burkehill Global Management, LP new | 250,000 | $7M | 0.2% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC added | 249,767 | $7M | 0.2% | 2026-Q2 |
| Invesco Ltd. added | 247,902 | $7M | 0.2% | 2026-Q2 |
| Tidal Investments LLC added | 240,476 | $7M | 0.2% | 2026-Q2 |
| HSBC HOLDINGS PLC added | 236,204 | $7M | 0.2% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 228,229 | $7M | 0.2% | 2026-Q2 |
| Legal & General Group Plc trimmed | 227,867 | $7M | 0.2% | 2026-Q2 |
| Longaeva Partners L.P. new | 214,355 | $6M | 0.2% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. trimmed | 210,996 | $6M | 0.2% | 2026-Q2 |
| MARSHALL WACE, LLP trimmed | 202,227 | $6M | 0.2% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 195,636 | $6M | 0.2% | 2026-Q2 |
| BARCLAYS PLC trimmed | 175,322 | $5M | 0.2% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 173,993 | $5M | 0.2% | 2026-Q2 |
| Sumitomo Mitsui Trust Group, Inc. added | 173,561 | $5M | 0.2% | 2026-Q2 |
| Polymer Capital Management (HK) LTD added | 165,209 | $5M | 0.2% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP trimmed | 163,903 | $5M | 0.2% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 159,419 | $5M | 0.2% | 2026-Q2 |
| Swiss National Bank trimmed | 138,294 | $4M | 0.1% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd | 136,489 | $4M | 0.1% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND trimmed | 135,404 | $4M | 0.1% | 2026-Q2 |
| Rockefeller Capital Management L.P. added | 134,864 | $4M | 0.1% | 2026-Q2 |
| MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC trimmed | 130,704 | $4M | 0.1% | 2026-Q2 |
| Nuveen, LLC added | 115,112 | $3M | 0.1% | 2026-Q2 |
| E Fund Management Co., Ltd. added | 109,327 | $3M | 0.1% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC new | 104,994 | $3M | 0.1% | 2026-Q2 |
| Bank of New York Mellon Corp added | 104,765 | $3M | 0.1% | 2026-Q2 |
| Mitsubishi UFJ Asset Management Co., Ltd. added | 97,113 | $3M | 0.1% | 2026-Q2 |
| Pictet Asset Management Holding SA trimmed | 94,397 | $3M | 0.1% | 2026-Q2 |
| XTX Topco Ltd trimmed | 88,106 | $3M | 0.1% | 2026-Q2 |
| Monashee Investment Management LLC new | 85,385 | $2M | 0.1% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. new | 83,166 | $2M | 0.1% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 82,015 | $2M | 0.1% | 2026-Q2 |
| Quantinno Capital Management LP added | 81,596 | $2M | 0.1% | 2026-Q2 |
| Raiffeisen Bank International AG trimmed | 80,000 | $2M | 0.1% | 2026-Q2 |
| Creative Planning added | 79,946 | $2M | 0.1% | 2026-Q2 |
| ROYAL LONDON ASSET MANAGEMENT LTD | 75,000 | $2M | 0.1% | 2026-Q2 |
| VOYA INVESTMENT MANAGEMENT LLC added | 70,017 | $2M | 0.1% | 2026-Q2 |
| Zurcher Kantonalbank (Zurich Cantonalbank) added | 62,746 | $2M | 0.1% | 2026-Q2 |
| CITIGROUP INC trimmed | 56,247 | $2M | 0.1% | 2026-Q2 |
| Susquehanna Portfolio Strategies, LLC added | 55,533 | $2M | 0.1% | 2026-Q2 |
| AVIVA PLC trimmed | 53,486 | $2M | 0.1% | 2026-Q2 |
| NLB Skladi, upravljanje premozenja, d.o.o. added | 50,000 | $1M | 0.0% | 2026-Q2 |
| FRED ALGER MANAGEMENT, LLC new | 46,856 | $1M | 0.0% | 2026-Q2 |
| KLP KAPITALFORVALTNING AS added | 45,400 | $1M | 0.0% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. added | 41,384 | $1M | 0.0% | 2026-Q2 |
| Privium Fund Management B.V. new | 35,400 | $1M | 0.0% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 35,348 | $1M | 0.0% | 2026-Q2 |
| CITADEL ADVISORS LLC trimmed | 34,141 | $986K | 0.0% | 2026-Q2 |
| STOREBRAND ASSET MANAGEMENT AS added | 33,660 | $972K | 0.0% | 2026-Q2 |
| Rock Springs Capital Management LP trimmed | 33,500 | $967K | 0.0% | 2026-Q2 |
| Bellevue Group AG trimmed | 33,054 | $955K | 0.0% | 2026-Q2 |
| Universal- Beteiligungs- und Servicegesellschaft mbH trimmed | 32,467 | $938K | 0.0% | 2026-Q2 |
| Virtus Investment Advisers, LLC trimmed | 32,419 | $936K | 0.0% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 32,184 | $929K | 0.0% | 2026-Q2 |
| Krane Funds Advisors LLC trimmed | 31,488 | $909K | 0.0% | 2026-Q2 |
| Aberdeen Group plc added | 30,608 | $884K | 0.0% | 2026-Q2 |
| COOKSON PEIRCE & CO INC new | 30,000 | $866K | 0.0% | 2026-Q2 |
| TUDOR INVESTMENT CORP ET AL trimmed | 29,066 | $839K | 0.0% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.