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Zai Lab (ZLAB): RTW Investments, LP added to its stake +4.67M shares

RTW Investments, LP added to its stake in Zai Lab, per its Q4 2025 13F.

6.96M
Shares reported · +4.67M vs prior quarter
1.2%
Disclosed portfolio weight
$123M
Reported value
Holdings as of
Dec 31, 2025
Filed
Feb 17, 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.

    What came next

    1. Feb 26, 2026Company filing · Form 8-K · ResultsReported its results
    2. May 7, 2026Company filing · Form 8-K · ResultsReported its results
    3. May 18, 2026Company filing · Form 8-K · Executive changeChanged a top executive or board member“On May 18, 2026, the Board of Directors of Zai Lab Limited (the “Company”) determined that Mr. Josh Smiley will cease serving as President and Chief Operating Officer of the Company, effective as of May 18, 2026, and his last day of employment with the Company will be May 22, 2026.”
    View the official recordSEC Form 13F-HR

    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 Zai Lab

    For Zai Lab, OQRO holds 1 insider filing (SEC Form 4 or Form 144) 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 ZLAB page.

    How this filing works

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    Other disclosures at Zai Lab

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

    This is one filing. OQRO holds the rest

    Insider trades filed with the SEC, stock trades disclosed by members of Congress, fund holdings from 13F filings and federal contract awards, each one in plain words next to its official filing. On this page it opens why the trade stands out, what the company did around that time, the price since, and every field of the form.

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