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Foresite Capital Management VI LLC: IRON position timeline

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

Foresite Capital Management VI LLC held 375,039 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 375,039 shares
    Change vs previous 13F +970 shares

    2.73% of the 13F portfolio, value $27,430,353.

    13F-HR 0001104659-26-097121 filed by Foresite Capital Management V, LLC
    Filed (acceptance time not in the bulk data set), ingested

    • Foresite Capital Management V, LLC: 374,069 shares
    • Foresite Capital Management VI LLC: 970 shares

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

  2. period ended2026-03-31
    13F 374,069 shares
    Change vs previous 13F +75,000 shares

    8.83% of the 13F portfolio, value $23,917,972.

    13F-HR 0001104659-26-062464 filed by Foresite Capital Management V, 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 299,069 shares
    Change vs previous 13F 0 shares

    14.45% of the 13F portfolio, value $23,749,069.

    13F-HR 0001104659-26-015410 filed by Foresite Capital Management V, 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 299,069 shares
    Change vs previous 13F 0 shares

    18.17% of the 13F portfolio, value $19,762,480.

    13F-HR 0001104659-25-112503 filed by Foresite Capital Management V, 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 299,069 shares
    Change vs previous 13F 0 shares

    19.62% of the 13F portfolio, value $15,838,694.

    13F-HR 0001104659-25-076820 filed by Foresite Capital Management V, 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 299,069 shares
    Change vs previous 13F 0 shares

    16.94% of the 13F portfolio, value $14,845,785.

    13F-HR 0001104659-25-049396 filed by Foresite Capital Management V, 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 299,069 shares
    Change vs previous 13F 0 shares

    15.78% of the 13F portfolio, value $18,960,975.

    13F-HR 0001104659-25-013930 filed by Foresite Capital Management V, 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 299,069 shares
    Change vs previous 13F not available

    10.21% of the 13F portfolio, value $14,696,251.

    13F-HR 0001104659-24-118745 filed by Foresite Capital Management V, LLC
    Filed (acceptance time not in the bulk data set), ingested

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