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Frazier Life Sciences Management, L.P.: IRON position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Frazier Life Sciences Management, L.P. on IRON, newest first. How the timeline and the estimate are built.

Frazier Life Sciences Management, L.P. held 1,354,852 IRON 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 1,354,852 shares
    Change vs previous 13F 0 shares

    2.16% of the 13F portfolio, value $99,093,875.

    13F-HR 0001892134-26-000003 filed by Frazier Life Sciences Management, L.P.
    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 1,354,852 shares
    Change vs previous 13F +94,852 shares

    2.23% of the 13F portfolio, value $86,629,237.

    13F-HR 0001892134-26-000002 filed by Frazier Life Sciences Management, L.P.
    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 1,260,000 shares
    Change vs previous 13F -178,534 shares

    2.69% of the 13F portfolio, value $100,056,600.

    13F-HR 0001892134-26-000001 filed by Frazier Life Sciences Management, L.P.
    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 1,438,534 shares
    Change vs previous 13F -216,300 shares

    2.85% of the 13F portfolio, value $95,058,327.

    13F-HR 0001892134-25-000012 filed by Frazier Life Sciences Management, L.P.
    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 1,654,834 shares
    Change vs previous 13F -100,000 shares

    3.5% of the 13F portfolio, value $87,640,009.

    13F-HR 0001892134-25-000006 filed by Frazier Life Sciences Management, L.P.
    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 1,754,834 shares
    Change vs previous 13F 0 shares

    3.98% of the 13F portfolio, value $87,109,960.

    13F-HR 0001892134-25-000005 filed by Frazier Life Sciences Management, L.P.
    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 1,754,834 shares
    Change vs previous 13F 0 shares

    4.62% of the 13F portfolio, value $111,256,476.

    13F-HR 0001892134-25-000001 filed by Frazier Life Sciences Management, L.P.
    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 1,754,834 shares
    Change vs previous 13F not available

    3.46% of the 13F portfolio, value $86,232,543.

    13F-HR 0001892134-24-000006 filed by Frazier Life Sciences Management, L.P.
    Filed (acceptance time not in the bulk data set), ingested

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