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Disclosery

Janus Henderson: INSM position timeline

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

Janus Henderson held 2,605,181 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 2,605,181 shares
    Share basis changed not comparable

    Membership change: Jupiter Topco LLC joined the group. 0.11% of the 13F portfolio, value $277,779,211.

    13F-HR 0001085146-26-000611 filed by Jupiter Topco LLC
    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/A 419,304 shares
    Change vs previous 13F -381,251 shares

    0.03% of the 13F portfolio, value $68,564,425.

    13F-HR/A 0001085146-26-000420 filed by JANUS HENDERSON GROUP PLC
    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 800,555 shares
    Change vs previous 13F -402,228 shares

    0.06% of the 13F portfolio, value $139,334,263.

    13F-HR 0001085146-26-000226 filed by JANUS HENDERSON GROUP PLC
    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 1,202,783 shares
    Change vs previous 13F -1,090,359 shares

    0.08% of the 13F portfolio, value $173,210,966.

    13F-HR 0001085146-25-005993 filed by JANUS HENDERSON GROUP PLC
    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 2,293,142 shares
    Change vs previous 13F +747,723 shares

    0.11% of the 13F portfolio, value $230,777,073.

    13F-HR 0001085146-25-005104 filed by JANUS HENDERSON GROUP PLC
    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 1,545,419 shares
    Change vs previous 13F +99,723 shares

    0.07% of the 13F portfolio, value $120,528,826.

    13F-HR 0001085146-25-003208 filed by JANUS HENDERSON GROUP PLC
    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 1,445,696 shares
    Change vs previous 13F -43,208 shares

    0.05% of the 13F portfolio, value $99,811,356.

    13F-HR 0001085146-25-001531 filed by JANUS HENDERSON GROUP PLC
    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 1,488,904 shares
    Change vs previous 13F not available

    0.06% of the 13F portfolio, value $108,687,008.

    13F-HR 0001085146-24-005765 filed by JANUS HENDERSON GROUP PLC
    Filed (acceptance time not in the bulk data set), ingested

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