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Disclosery

EcoR1 Capital, LLC: MGNX position timeline

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

EcoR1 Capital, LLC held 0 MGNX shares at 2025-09-30 per its 13F-HR filed 2025-11-14.

the latest 13F is the newest step

  1. period ended2025-09-30
    13F 0 shares
    Change vs previous 13F -1,602,717 shares

    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).

    Exited: the 13F for this period no longer lists the position.

  2. period ended2025-06-30
    13F 1,602,717 shares
    Change vs previous 13F +1,602,717 shares

    0.11% of the 13F portfolio, value $1,939,288.

    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).

  3. period ended2024-12-31
    13F 0 shares
    Change vs previous 13F -56,018 shares

    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).

    Exited: the 13F for this period no longer lists the position.

  4. period ended2024-09-30
    13F 56,018 shares
    Change vs previous 13F not available

    0.01% of the 13F portfolio, value $184,299.

    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).