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RTW INVESTMENTS, LP: INSM position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of RTW INVESTMENTS, LP on INSM, newest first. How the timeline and the estimate are built.

RTW INVESTMENTS, LP held 4,842,880 INSM 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 4,842,880 shares
    Change vs previous 13F 0 shares

    4.41% of the 13F portfolio, value $516,347,866.

    13F-HR 0001493215-26-000164 filed by RTW INVESTMENTS, LP
    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 4,842,880 shares
    Change vs previous 13F +1 shares

    7.88% of the 13F portfolio, value $791,907,738.

    13F-HR 0001493215-26-000130 filed by RTW INVESTMENTS, LP
    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 4,842,879 shares
    Change vs previous 13F +1,758,321 shares

    8.44% of the 13F portfolio, value $842,854,661.

    13F-HR 0001493215-26-000060 filed by RTW INVESTMENTS, LP
    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 3,084,558 shares
    Change vs previous 13F 0 shares

    5.47% of the 13F portfolio, value $444,207,198.

    13F-HR 0001493215-25-000054 filed by RTW INVESTMENTS, LP
    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 3,084,558 shares
    Change vs previous 13F +70,000 shares

    4.42% of the 13F portfolio, value $310,429,917.

    13F-HR 0001493215-25-000007 filed by RTW INVESTMENTS, LP
    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 3,014,558 shares
    Change vs previous 13F 0 shares

    3.52% of the 13F portfolio, value $229,980,630.

    13F-HR 0001493215-25-000003 filed by RTW INVESTMENTS, LP
    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 3,014,558 shares
    Change vs previous 13F -257,450 shares

    3.15% of the 13F portfolio, value $208,125,084.

    13F-HR 0001493152-25-006608 filed by RTW INVESTMENTS, LP
    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 3,272,008 shares
    Change vs previous 13F not available

    3.46% of the 13F portfolio, value $238,856,584.

    13F-HR 0001493152-24-045409 filed by RTW INVESTMENTS, LP
    Filed (acceptance time not in the bulk data set), ingested

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