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Sarissa Capital Management LP: IRWD position timeline

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

Sarissa Capital Management LP held 9,188,635 IRWD 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 9,188,635 shares
    Change vs previous 13F 0 shares

    21.75% of the 13F portfolio, value $38,684,153.

    13F-HR 0000899140-26-000879 filed by Sarissa Capital 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 9,188,635 shares
    Change vs previous 13F -6,730,800 shares

    20.46% of the 13F portfolio, value $32,252,109.

    13F-HR 0000899140-26-000574 filed by Sarissa Capital 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 15,919,435 shares
    Change vs previous 13F 0 shares

    24.07% of the 13F portfolio, value $53,648,496.

    13F-HR 0000899140-26-000256 filed by Sarissa Capital 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 15,919,435 shares
    Change vs previous 13F 0 shares

    11.56% of the 13F portfolio, value $20,854,460.

    13F-HR 0000899140-25-001320 filed by Sarissa Capital 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 15,919,435 shares
    Change vs previous 13F -470,565 shares

    7.4% of the 13F portfolio, value $11,417,419.

    13F-HR 0000899140-25-000986 filed by Sarissa Capital 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 16,390,000 shares
    Change vs previous 13F 0 shares

    15.57% of the 13F portfolio, value $24,093,300.

    13F-HR 0000899140-25-000705 filed by Sarissa Capital 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 16,390,000 shares
    Change vs previous 13F 0 shares

    22.49% of the 13F portfolio, value $72,607,700.

    13F-HR 0000899140-25-000321 filed by Sarissa Capital 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 16,390,000 shares
    Change vs previous 13F not available

    16.78% of the 13F portfolio, value $67,526,800.

    13F-HR 0000899140-24-001252 filed by Sarissa Capital Management LP
    Filed (acceptance time not in the bulk data set), ingested

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