Who owns Zura Bio Limited (ZURA)
Which tracked institutional funds hold ZURA, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ZURA company fundamentals →
Ownership as of the 2026-Q1 13F filings. 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 ZURA is one-sided between 2025-Q4 and 2026-Q1: 41 added or opened and 10 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
ZURA’s largest tracked holder by dollar value, SUVRETTA CAPITAL MANAGEMENT, LLC, sizes it at 1.5% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 1.5pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in ZURA 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 2025-Q4 and 2026-Q1, across 93 tracked filers holding ZURA, 61 increased or opened the position and 38 reduced or closed it; over the same quarter, open-market insider Form 4s were net purchases.
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 ZURA between the 2025-Q4 and 2026-Q1 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 14
- Commodore Capital LP$19M
- Cormorant Asset Management, LP$9M
- QVT Financial LP$8M
- EcoR1 Capital, LLC$7M
- STEMPOINT CAPITAL LP$4M
- Saturn V Capital Management LP$4M
Full exits 3
- VANGUARD GROUP INC$3M
- Seven Fleet Capital Management LP$872K
- Caption Management, LLC$817K
Largest adds
- SUVRETTA CAPITAL MANAGEMENT, LLC$25M
- Siren, L.L.C.$15M
- Venrock Adviser, LLC$10M
- BRAIDWELL LP$7M
- Affinity Asset Advisors, LLC$6M
- Boxer Capital Management, LLC$5M
Largest trims
- MORGAN STANLEY$3M
- JANE STREET GROUP, LLC$2M
- CITADEL ADVISORS LLC$2M
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$1M
- UBS Group AG$1M
- 683 Capital Management, LLC$704K
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| SUVRETTA CAPITAL MANAGEMENT, LLC added | 9,067,001 | $54M | 13.2% | 2026-Q1 |
| Venrock Adviser, LLC added | 6,434,990 | $38M | 9.3% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 4,458,851 | $25M | 6.2% | 2026-Q1 |
| GREAT POINT PARTNERS LLC added | 4,215,930 | $25M | 6.1% | 2026-Q1 |
| BRAIDWELL LP added | 3,988,989 | $24M | 5.8% | 2026-Q1 |
| Siren, L.L.C. added | 3,734,866 | $22M | 5.4% | 2026-Q1 |
| Commodore Capital LP new | 3,250,000 | $19M | 4.7% | 2026-Q1 |
| Pfizer Inc trimmed | 2,838,913 | $17M | 4.1% | 2026-Q1 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 2,750,000 | $16M | 4.0% | 2026-Q1 |
| Affinity Asset Advisors, LLC added | 2,564,303 | $15M | 3.7% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 1,508,063 | $9M | 2.2% | 2026-Q1 |
| ARMISTICE CAPITAL, LLC trimmed | 1,507,000 | $9M | 2.2% | 2026-Q1 |
| Cormorant Asset Management, LP new | 1,450,000 | $9M | 2.1% | 2026-Q1 |
| QVT Financial LP new | 1,310,593 | $8M | 1.9% | 2026-Q1 |
| Ikarian Capital, LLC added | 1,193,492 | $7M | 1.7% | 2026-Q1 |
| EcoR1 Capital, LLC new | 1,179,715 | $7M | 1.7% | 2026-Q1 |
| Boxer Capital Management, LLC added | 900,000 | $5M | 1.3% | 2026-Q1 |
| MORGAN STANLEY trimmed | 872,950 | $5M | 1.3% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 872,662 | $5M | 1.3% | 2026-Q1 |
| MARSHALL WACE, LLP trimmed | 844,404 | $5M | 1.2% | 2026-Q1 |
| STEMPOINT CAPITAL LP trimmed | 753,520 | $4M | 1.1% | 2026-Q1 |
| Saturn V Capital Management LP new | 739,960 | $4M | 1.1% | 2026-Q1 |
| ADAR1 Capital Management, LLC added | 630,403 | $4M | 0.9% | 2026-Q1 |
| SILVERARC CAPITAL MANAGEMENT, LLC trimmed | 560,651 | $3M | 0.8% | 2026-Q1 |
| FMR LLC added | 529,346 | $3M | 0.8% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 527,691 | $3M | 0.8% | 2026-Q1 |
| Vestal Point Capital, LP new | 511,000 | $3M | 0.7% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 486,850 | $3M | 0.7% | 2026-Q1 |
| BlackRock, Inc. added | 457,359 | $3M | 0.7% | 2026-Q1 |
| Qube Research & Technologies Ltd added | 450,311 | $3M | 0.7% | 2026-Q1 |
| Foresite Capital Management VI LLC new | 450,000 | $3M | 0.7% | 2026-Q1 |
| BOOTHBAY FUND MANAGEMENT, LLC added | 374,506 | $2M | 0.5% | 2026-Q1 |
| KVP Capital Advisors, LP new | 373,128 | $2M | 0.5% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP trimmed | 318,186 | $2M | 0.5% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 313,300 | $2M | 0.5% | 2026-Q1 |
| JANE STREET GROUP, LLC trimmed | 278,890 | $2M | 0.4% | 2026-Q1 |
| UBS Group AG trimmed | 241,027 | $1M | 0.3% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 231,862 | $1M | 0.3% | 2026-Q1 |
| STATE STREET CORP added | 194,963 | $1M | 0.3% | 2026-Q1 |
| BARCLAYS PLC added | 169,833 | $1M | 0.2% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 152,915 | $910K | 0.2% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 136,523 | $812K | 0.2% | 2026-Q1 |
| Alberta Investment Management Corp | 133,200 | $793K | 0.2% | 2026-Q1 |
| XTX Topco Ltd added | 119,712 | $712K | 0.2% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP new | 116,686 | $694K | 0.2% | 2026-Q1 |
| 683 Capital Management, LLC trimmed | 110,000 | $654K | 0.2% | 2026-Q1 |
| NORTHERN TRUST CORP added | 104,130 | $620K | 0.2% | 2026-Q1 |
| Verdad Advisers, LP new | 97,102 | $578K | 0.1% | 2026-Q1 |
| Hudson Bay Capital Management LP added | 95,355 | $567K | 0.1% | 2026-Q1 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC trimmed | 85,348 | $508K | 0.1% | 2026-Q1 |
| GROUP ONE TRADING LLC added | 84,865 | $505K | 0.1% | 2026-Q1 |
| HRT FINANCIAL LP added | 77,505 | $461K | 0.1% | 2026-Q1 |
| Burkehill Global Management, LP new | 75,000 | $446K | 0.1% | 2026-Q1 |
| Brevan Howard Capital Management LP new | 72,038 | $429K | 0.1% | 2026-Q1 |
| ALPS ADVISORS INC added | 70,192 | $418K | 0.1% | 2026-Q1 |
| RBF Capital, LLC trimmed | 58,193 | $346K | 0.1% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 47,886 | $285K | 0.1% | 2026-Q1 |
| Squarepoint Ops LLC added | 44,939 | $267K | 0.1% | 2026-Q1 |
| FOX RUN MANAGEMENT, L.L.C. new | 46,062 | $262K | 0.1% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 43,135 | $257K | 0.1% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC added | 33,733 | $201K | 0.0% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 31,096 | $185K | 0.0% | 2026-Q1 |
| OMERS ADMINISTRATION Corp trimmed | 29,800 | $177K | 0.0% | 2026-Q1 |
| Jump Financial, LLC trimmed | 28,063 | $167K | 0.0% | 2026-Q1 |
| Brendel Financial Advisors LLC new | 28,052 | $167K | 0.0% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC added | 26,892 | $160K | 0.0% | 2026-Q1 |
| INSIGNEO ADVISORY SERVICES, LLC trimmed | 25,650 | $153K | 0.0% | 2026-Q1 |
| Ghisallo Capital Management LLC new | 25,000 | $149K | 0.0% | 2026-Q1 |
| Mariner, LLC trimmed | 24,734 | $147K | 0.0% | 2026-Q1 |
| China Universal Asset Management Co., Ltd. new | 21,600 | $129K | 0.0% | 2026-Q1 |
| SIMPLEX TRADING, LLC trimmed | 18,491 | $110K | 0.0% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 17,898 | $106K | 0.0% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 16,821 | $100K | 0.0% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC trimmed | 16,146 | $96K | 0.0% | 2026-Q1 |
| Diametric Capital, LP new | 15,681 | $93K | 0.0% | 2026-Q1 |
| Catalyst Funds Management Pty Ltd trimmed | 15,300 | $91K | 0.0% | 2026-Q1 |
| Forefront Analytics, LLC trimmed | 14,901 | $89K | 0.0% | 2026-Q1 |
| MANGROVE PARTNERS IM, LLC new | 14,791 | $88K | 0.0% | 2026-Q1 |
| RA CAPITAL MANAGEMENT, L.P. | 3,217,503 | $4M | 1.0% | 2025-Q1 stale |
| Allostery Investments LP added | 2,329,384 | $3M | 0.7% | 2025-Q1 stale |
| VANGUARD GROUP INC added | 568,118 | $3M | 0.7% | 2025-Q4 stale |
| AMERIPRISE FINANCIAL INC new | 500,000 | $2M | 0.5% | 2025-Q3 stale |
| Atika Capital Management LLC new | 276,000 | $1M | 0.3% | 2025-Q3 stale |
| Deep Track Capital, LP trimmed | 259,014 | $1M | 0.3% | 2025-Q3 stale |
| Seven Fleet Capital Management LP new | 166,500 | $872K | 0.2% | 2025-Q4 stale |
| Caption Management, LLC trimmed | 155,936 | $817K | 0.2% | 2025-Q4 stale |
| Woodline Partners LP | 520,276 | $671K | 0.2% | 2025-Q1 stale |
| SPHERA FUNDS MANAGEMENT LTD. trimmed | 421,229 | $543K | 0.1% | 2025-Q1 stale |
| DLD Asset Management, LP new | 100,000 | $433K | 0.1% | 2025-Q3 stale |
| TWO SIGMA ADVISERS, LP trimmed | 80,400 | $421K | 0.1% | 2025-Q4 stale |
| Dauntless Investment Group, LLC new | 61,010 | $320K | 0.1% | 2025-Q4 stale |
| ACADIAN ASSET MANAGEMENT LLC trimmed | 52,040 | $271K | 0.1% | 2025-Q4 stale |
| ExodusPoint Capital Management, LP new | 46,921 | $246K | 0.1% | 2025-Q4 stale |
| Cubist Systematic Strategies, LLC added | 49,360 | $214K | 0.1% | 2025-Q3 stale |
| Quadrature Capital Ltd added | 36,572 | $192K | 0.0% | 2025-Q4 stale |
| AQR CAPITAL MANAGEMENT LLC trimmed | 44,215 | $191K | 0.0% | 2025-Q3 stale |
| Lighthouse Investment Partners, LLC new | 21,660 | $113K | 0.0% | 2025-Q4 stale |
| Y-Intercept (Hong Kong) Ltd new | 107,881 | $113K | 0.0% | 2025-Q2 stale |
| Bank of New York Mellon Corp | 85,917 | $111K | 0.0% | 2025-Q1 stale |
| Forefront Wealth Partners, LLC new | 21,518 | $93K | 0.0% | 2025-Q3 stale |
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.