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RTW INVESTMENTS, LP: ZLAB position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of RTW INVESTMENTS, LP on ZLAB, newest first. How the timeline and the estimate are built.

RTW INVESTMENTS, LP held 6,574,032 ZLAB shares at 2026-06-30 per its 13F-HR filed 2026-08-14.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 6,574,032 shares
    Change vs previous 13F 0 shares

    1.07% of the 13F portfolio, value $124,906,608.

    13F-HR 0001493215-26-000164 filed by RTW INVESTMENTS, LP
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  2. period ended2026-03-31
    13F 6,574,032 shares
    Change vs previous 13F -385,000 shares

    1.23% of the 13F portfolio, value $123,657,542.

    13F-HR 0001493215-26-000130 filed by RTW INVESTMENTS, LP
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  3. period ended2025-12-31
    13F 6,959,032 shares
    Change vs previous 13F +4,667,660 shares

    1.23% of the 13F portfolio, value $122,757,324.

    13F-HR 0001493215-26-000060 filed by RTW INVESTMENTS, LP
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  4. period ended2025-09-30
    13F 2,291,372 shares
    Change vs previous 13F -3,245,504 shares

    0.96% of the 13F portfolio, value $77,654,597.

    13F-HR 0001493215-25-000054 filed by RTW INVESTMENTS, LP
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  5. period ended2025-06-30
    13F 5,536,876 shares
    Change vs previous 13F +2,400,196 shares

    2.76% of the 13F portfolio, value $193,624,554.

    13F-HR 0001493215-25-000007 filed by RTW INVESTMENTS, LP
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  6. period ended2025-03-31
    13F 3,136,680 shares
    Change vs previous 13F +627,561 shares

    1.73% of the 13F portfolio, value $113,359,615.

    13F-HR 0001493215-25-000003 filed by RTW INVESTMENTS, LP
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  7. period ended2024-12-31
    13F 2,509,119 shares
    Change vs previous 13F not available

    0.99% of the 13F portfolio, value $65,713,827.

    13F-HR 0001493152-25-006608 filed by RTW INVESTMENTS, LP
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).