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BAKER BROS. ADVISORS LP: INSM position timeline

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

BAKER BROS. ADVISORS LP held 8,796,111 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 8,796,111 shares
    Change vs previous 13F +1,375,000 shares

    4.7% of the 13F portfolio, value $937,841,355.

    13F-HR 0001104659-26-097191 filed by BAKER BROS. ADVISORS 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 7,421,111 shares
    Change vs previous 13F +828,365 shares

    6.97% of the 13F portfolio, value $1,213,500,071.

    13F-HR 0001104659-26-062547 filed by BAKER BROS. ADVISORS 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 6,592,746 shares
    Change vs previous 13F -110,738 shares

    6.72% of the 13F portfolio, value $1,147,401,514.

    13F-HR 0001104659-26-016374 filed by BAKER BROS. ADVISORS 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 6,703,484 shares
    Change vs previous 13F -1,009,416 shares

    6.98% of the 13F portfolio, value $965,368,731.

    13F-HR 0001104659-25-112595 filed by BAKER BROS. ADVISORS 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 7,712,900 shares
    Change vs previous 13F +2,332,274 shares

    7.53% of the 13F portfolio, value $776,226,256.

    13F-HR 0001104659-25-078573 filed by BAKER BROS. ADVISORS 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 5,380,626 shares
    Change vs previous 13F +373,763 shares

    4.54% of the 13F portfolio, value $410,487,958.

    13F-HR 0001104659-25-049518 filed by BAKER BROS. ADVISORS 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 5,006,863 shares
    Change vs previous 13F +590,945 shares

    3.69% of the 13F portfolio, value $345,673,822.

    13F-HR 0001104659-25-014085 filed by BAKER BROS. ADVISORS 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 4,415,918 shares
    Change vs previous 13F not available

    3.34% of the 13F portfolio, value $322,362,014.

    13F-HR 0001104659-24-118899 filed by BAKER BROS. ADVISORS LP
    Filed (acceptance time not in the bulk data set), ingested

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