Form 13-F position report

ZURA BIO LTD

Reported by PFIZER INC

Company profile Manager portfolio Source filing
ZURA CUSIP G9TY5A101 Manager CIK 0000078003
Latest reported change

Reported 2,838,913 shares, down 131,109 (4.4%) from the prior quarter.

Reported value 8.2%; share count -4.4% vs. the prior quarter.

Reduced
% of reported 13F value 7.05% This manager · Q1 2026
Shares 2,838,913 Quarter-end amount reported
Reported value $16,834,754 Fair value at quarter end
Consecutive quarters held 6 Through Q1 2026

Reported position value by quarter

Reported position value by quarter

Each bar is a Form 13-F quarter-end snapshot. It does not show trades made within the quarter.

Manager history

Quarterly position history

How this manager's reported quarter-end position changed over time.

7 quarters
Quarter Activity Shares Change % of reported 13F Reported value Filed
Q2 2026 Reduced 538,841 -2,300,072 (-81.0%) 1.69% $2,882,799 2026-08-13
Q1 2026 Reduced 2,838,913 -131,109 (-4.4%) 7.05% $16,834,754 2026-05-12
Q4 2025 Unchanged 2,970,022 0 (0.0%) 6.58% $15,562,915 2026-02-12
Q3 2025 Unchanged 2,970,022 0 (0.0%) 2.94% $12,860,195 2025-11-13
Q2 2025 Unchanged 2,970,022 0 (0.0%) 0.54% $3,118,523 2025-08-11
Q1 2025 Unchanged 2,970,022 0 (0.0%) 0.76% $3,831,328 2025-05-13
Q4 2024 New 2,970,022 +2,970,022 (0.0%) 0.29% $7,425,055 2025-02-14
Institutional context

Who else reported the position

105 managers reported ZURA BIO LTD for Q1 2026.

Manager Activity Shares Change % of reported 13F Reported value Tenure
SUVRETTA CAPITAL MANAGEMENT LLC Added 9,067,001 +3,500,000 1.38% $53,948,656 12 qtrs
VR Adviser LLC Added 6,434,990 +1,089,875 1.43% $38,288,191 8 qtrs
JPMorgan Chase & Co Reduced 4,458,851 -13,905 < 0.01% $25,326,274 12 qtrs
GREAT POINT PARTNERS LLC Added 4,215,930 +400,000 5.77% $25,084,784 12 qtrs
BRAIDWELL LP Added 3,988,989 +808,600 0.79% $23,734,485 7 qtrs
Siren L L C Added 3,734,866 +2,434,866 0.62% $22,222,453 2 qtrs
COMMODORE CAPITAL LP New 3,250,000 +3,250,000 1.12% $19,337,500 1 qtr
PFIZER INC This report Reduced 2,838,913 -131,109 7.05% $16,834,754 6 qtrs
ADAGE CAPITAL PARTNERS GP L L C Unchanged 2,750,000 0 0.03% $16,362,500 3 qtrs
Affinity Asset Advisors LLC Added 2,564,303 +750,632 0.79% $15,257,603 9 qtrs
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Filing details and methodology As reported
Report period
March 31, 2026
Filed
May 12, 2026
Filing type
13F-HR
Position type
CLASS A ORD SHS

Voting authority reported

Sole
2,838,913
Shared
0
None
0

“None” means the manager reported no voting authority for those shares on non-routine matters. It does not disclose why and is not evidence of securities lending.

Form 13-F is a delayed quarter-end snapshot of disclosed long Section 13(f) securities. It can be filed up to 45 days after quarter end, excludes short positions and most non-U.S. securities, and does not reveal intra-quarter trading. For options, reported shares and value describe the underlying-share exposure; strike, expiry, premium, and written positions are not disclosed.