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EcoR1 Capital, LLC: ZYME position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of EcoR1 Capital, LLC on ZYME, newest first. How the timeline and the estimate are built.

EcoR1 Capital, LLC held 22,970,388 ZYME 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 22,970,388 shares
    Change vs previous 13F 0 shares

    29.77% of the 13F portfolio, value $600,445,942.

    13F-HR 0000935836-26-000415 filed by EcoR1 Capital, LLC
    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 22,970,388 shares
    Change vs previous 13F 0 shares

    24.58% of the 13F portfolio, value $575,178,516.

    13F-HR 0000935836-26-000270 filed by EcoR1 Capital, LLC
    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 22,970,388 shares
    Change vs previous 13F 0 shares

    27.61% of the 13F portfolio, value $604,810,316.

    13F-HR 0000935836-26-000101 filed by EcoR1 Capital, LLC
    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 22,970,388 shares
    Change vs previous 13F 0 shares

    18.83% of the 13F portfolio, value $392,334,227.

    13F-HR 0000935836-25-000671 filed by EcoR1 Capital, LLC
    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 22,970,388 shares
    Change vs previous 13F +5,710,840 shares

    17.09% of the 13F portfolio, value $288,278,369.

    13F-HR 0000935836-25-000506 filed by EcoR1 Capital, LLC
    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 17,259,548 shares
    Change vs previous 13F +2,231,469 shares

    12.21% of the 13F portfolio, value $205,561,217.

    13F-HR 0000935836-25-000338 filed by EcoR1 Capital, LLC
    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 15,028,079 shares
    Change vs previous 13F +1,590,606 shares

    8.79% of the 13F portfolio, value $220,011,077.

    13F-HR 0000935836-25-000164 filed by EcoR1 Capital, LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  8. period ended2024-09-30
    13F 13,437,473 shares
    Change vs previous 13F not available

    5.77% of the 13F portfolio, value $168,640,286.

    13F-HR 0000935836-24-000682 filed by EcoR1 Capital, LLC
    Filed (acceptance time not in the bulk data set), ingested

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