Zura Bio (ZURA)Siren, L.L.C. added to its stake +2.43M shares

3.73M

Shares reported · +2.43M vs prior quarter

0.62%

Disclosed portfolio weight

$22.2M

Reported value

Holdings as of

Mar 31, 2026

Filed

May 14, 2026

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

1. Mar 19, 2026Company filing · Form 8-K · Results, Reg FDReported its results, and shared information with investors
2. Apr 20, 2026Company filing · Form 8-K · Executive changeChanged a top executive or board member“On April 20, 2026, Eric Hyllengren, the Company’s Chief Financial Officer, Principal Financial Officer and Principal Accounting Officer, was separated from the Company.”
3. May 7, 2026Company filing · Form 8-K · Results, Reg FDReported its results, and shared information with investors

What came next

1. May 20, 2026Company filing · Form 8-K · Executive changeChanged a top executive or board member“On May 20, 2026, Someit Sidhu notified Zura Bio Limited (the “Company”) of his decision to resign from the board of directors of the Company effective as of May 21, 2026.”
2. Jun 17, 2026Company filing · Form 8-K · Executive change, Shareholder voteChanged a top executive or board member, and held a shareholder vote“On June 17, 2026, Zura Bio Limited (the “Company”) held its Annual General Meeting of Shareholders (the “Annual Meeting”), at which a quorum was present. At the Annual Meeting, the shareholders of the Company approved an amendment and restatement of the Company’s 2023 Equity Incentive Plan (the “Amended 2023 Plan”).”
3. Aug 11, 2026Company filing · Form 8-K · Results, Reg FDReported its results, and shared information with investors

How to read SEC Form 13F-HR

Form 13F is the quarterly report in which investment managers that oversee $100 million or more list the US-listed stocks and some other securities they held on the last day of the quarter.

Full guide: What is an SEC Form 13F?

What else is on file for Zura Bio

For Zura Bio, OQRO holds 1 fund holdings report (13F) dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its ZURA page.

How this filing works

• SEC Form 13F

Other disclosures at Zura Bio

• SEC Form 13F-HRAug 14, 2026
• SEC Form 13F-HRMay 15, 2026
• SEC Form 13F-HRFeb 17, 2026
• SEC Form 13F-HRNov 14, 2025
• SEC Form 4Nov 27, 2024

Everything OQRO holds on this company is on its ZURA page.