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Cormorant Asset Management, LP: INSM position timeline

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

Cormorant Asset Management, LP held 75,000 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 75,000 shares
    Change vs previous 13F -115,000 shares

    0.41% of the 13F portfolio, value $7,996,500.

    13F-HR 0001583977-26-000007 filed by Cormorant Asset Management, 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 190,000 shares
    Change vs previous 13F -85,000 shares

    1.57% of the 13F portfolio, value $31,068,800.

    13F-HR 0001583977-26-000002 filed by Cormorant Asset Management, 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 275,000 shares
    Change vs previous 13F -155,000 shares

    2.71% of the 13F portfolio, value $47,861,000.

    13F-HR 0001583977-26-000001 filed by Cormorant Asset Management, 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 430,000 shares
    Change vs previous 13F -110,000 shares

    4.27% of the 13F portfolio, value $61,924,300.

    13F-HR 0001583977-25-000011 filed by Cormorant Asset Management, 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 540,000 shares
    Change vs previous 13F +15,000 shares

    4.05% of the 13F portfolio, value $54,345,600.

    13F-HR 0001583977-25-000007 filed by Cormorant Asset Management, 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 525,000 shares
    Change vs previous 13F -125,000 shares

    3.03% of the 13F portfolio, value $40,052,250.

    13F-HR 0001583977-25-000005 filed by Cormorant Asset Management, 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 650,000 shares
    Change vs previous 13F +150,000 shares

    2.46% of the 13F portfolio, value $44,876,000.

    13F-HR 0001583977-25-000001 filed by Cormorant Asset Management, 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 500,000 shares
    Change vs previous 13F not available

    1.94% of the 13F portfolio, value $36,500,000.

    13F-HR 0001583977-24-000006 filed by Cormorant Asset Management, LP
    Filed (acceptance time not in the bulk data set), ingested

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