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EcoR1 Capital, LLC: ANAB position timeline

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

EcoR1 Capital, LLC held 7,880,094 ANAB 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 7,880,094 shares
    Change vs previous 13F 0 shares

    26.37% of the 13F portfolio, value $531,906,345.

    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 7,880,094 shares
    Change vs previous 13F 0 shares

    18.68% of the 13F portfolio, value $437,030,013.

    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 7,880,094 shares
    Change vs previous 13F 0 shares

    17.44% of the 13F portfolio, value $382,026,957.

    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 7,880,094 shares
    Change vs previous 13F 0 shares

    11.58% of the 13F portfolio, value $241,288,478.

    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 7,880,094 shares
    Change vs previous 13F 0 shares

    10.37% of the 13F portfolio, value $174,938,087.

    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 7,880,094 shares
    Change vs previous 13F +6,646 shares

    8.7% of the 13F portfolio, value $146,490,947.

    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 7,873,448 shares
    Change vs previous 13F +78,452 shares

    4.16% of the 13F portfolio, value $104,244,452.

    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 7,794,996 shares
    Change vs previous 13F not available

    8.94% of the 13F portfolio, value $261,132,366.

    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).