Zura Bio Ltd
ZURA- Exchange
- Nasdaq
- Industry
- Biological Products, (No Diagnostic Substances)
- SEC CIK
- 0001855644
No open-market purchases or sales by Zura Bio Ltd insiders were filed in the last 90 days; 95 institutions reported holding it in 13F filings for Q2 2026, worth $428.9M in total; no superinvestor holds it.
Holders of 5% or more of ZURA
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Zura Bio Ltd, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| AI Biotechnology LLC | 13D/A | 18.20%19.7M shares | −1.70 ppfrom 19.90% | May 28, 20252 filings | Mar 2, 2026 | SEC |
| Athanor Capital | 13D | 15.70%11.6M shares | 0.00 ppfrom 15.70% | Jan 2, 20262 filings | Jan 27, 2026 | SEC |
| Venrock Healthcare Capital Partners III, L.P. | 13G/A | 9.90%9.82M shares | 0.00 ppfrom 9.90% | May 15, 20253 filings | May 15, 2026 | SEC |
| Suvretta Capital Management, LLC | 13G/A | 9.90%9.52M shares | +1.30 ppfrom 8.60% | Feb 13, 20262 filings | May 12, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
21 Schedule 13D and 13G filings on Zura Bio Ltd, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| May 15, 20264:29 PM ET | Venrock Healthcare Capital Partners III, L.P.and 6 others | 13G/A | 9.90%9.82M shares | 0.00 ppfrom 9.90% | Mar 31, 2026 | SEC |
| May 15, 20268:54 AM ET | Great Point Partners LLCand 2 others | 13G/A | 4.44%4.22M shares | −0.74 ppfrom 5.18%Below 5% | Mar 31, 2026 | SEC |
| May 12, 20266:15 PM ET | Suvretta Capital Management, LLCand 2 others | 13G/A | 9.90%9.52M shares | +1.30 ppfrom 8.60% | Mar 31, 2026 | SEC |
| May 6, 20262:00 PM ET | JPMorgan Chase & Co | 13G/A | 4.70%4.47M shares | −2.80 ppfrom 7.50%Below 5% | Apr 30, 2026 | SEC |
| Mar 2, 20265:53 PM ET | AI Biotechnology LLCand 3 others | 13D/A | 18.20%19.7M shares | −1.70 ppfrom 19.90% | Feb 26, 2026 | SEC |
| Feb 17, 20264:15 PM ET | Great Point Partners LLCand 2 others | 13G/A | 5.18%3.82M shares | −0.69 ppfrom 5.87% | Dec 31, 2025 | SEC |
| Feb 13, 20264:46 PM ET | Suvretta Capital Management, LLCand 2 others | 13G/A | 8.60%5.57M shares | – | Dec 31, 2025 | SEC |
| Jan 27, 20265:19 PM ET | Athanor Capitaland 1 other | 13D | 15.70%11.6M shares | 0.00 ppfrom 15.70% | Jan 23, 2026 | SEC |
| Jan 2, 20266:27 PM ET | Athanor Capitaland 1 other | 13G | 15.70%11.6M shares | New | Dec 29, 2025 | SEC |
| Nov 14, 20253:40 PM ET | Great Point Partners LLCand 2 others | 13G/A | 5.87%3.82M shares | +0.75 ppfrom 5.12% | Sep 30, 2025 | SEC |
| Nov 14, 20258:25 AM ET | Deep Track Capital, LPand 2 others | 13G/A | 0.40%259.0K shares | −6.73 ppfrom 7.13%Below 5% | Sep 30, 2025 | SEC |
| Aug 14, 20255:52 PM ET | Venrock Healthcare Capital Partners III, L.P.and 6 others | 13G/A | 9.90%6.35M shares | 0.00 ppfrom 9.90% | Jun 30, 2025 | SEC |
| Aug 14, 20258:50 AM ET | Deep Track Capital, LPand 2 others | 13G/A | 7.13%4.62M shares | – | Jun 30, 2025 | SEC |
| Jul 16, 20259:34 AM ET | JPMorgan Chase & Co | 13G | 7.50%4.67M shares | New | Jun 30, 2025 | SEC |
| May 28, 20255:28 PM ET | AI Biotechnology LLCand 3 others | 13D | 19.90%14.3M shares | New | May 21, 2025 | SEC |
| May 15, 20255:43 PM ET | Venrock Healthcare Capital Partners III, L.P.and 6 others | 13G/A | 9.90%7.03M shares | – | Mar 31, 2025 | SEC |
| May 14, 20254:11 PM ET | Great Point Partners LLCand 2 others | 13G | 5.12%3.17M shares | +0.26 ppfrom 4.86% | May 8, 2025 | SEC |
| Feb 14, 20259:05 PM ET | ADAR1 Capital Management, LLCand 2 others | 13G/A | 3.18%2.08M shares | –Below 5% | Dec 31, 2024 | SEC |
| Feb 14, 20256:24 PM ET | Ra Capital Management, L.P.and 3 others | 13G/A | 4.90%3.22M shares | –Below 5% | Dec 31, 2024 | SEC |
| Feb 14, 20254:32 PM ET | Great Point Partners LLCand 2 others | 13G/A | 4.86%3.17M shares | –Below 5% | Dec 31, 2024 | SEC |
| Feb 12, 20252:51 PM ET | Pfizer Inc | 13G/A | 4.60%2.97M shares | –Below 5% | Dec 31, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Zura Bio Ltd shares.
No Form 144 notices for Zura Bio Ltd are on file.