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GATEWAY INVESTMENT ADVISERS LLC: INSM position timeline

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

GATEWAY INVESTMENT ADVISERS LLC held 365,360 INSM shares at 2026-09-30 per its 13F-HR filed 2026-10-13.

the latest 13F is the newest step

  1. period ended2026-09-30
    13F 365,360 shares
    Change vs previous 13F +360 shares

    0.38% of the 13F portfolio, value $41,702,190.

    13F-HR 0001114618-26-000006 filed by GATEWAY INVESTMENT ADVISERS LLC
    Accepted , ingested

  2. period ended2026-06-30
    13F 365,000 shares
    Change vs previous 13F 0 shares

    0.38% of the 13F portfolio, value $38,916,300.

    13F-HR 0001114618-26-000003 filed by GATEWAY INVESTMENT ADVISERS LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  3. period ended2026-03-31
    13F 365,000 shares
    Change vs previous 13F 0 shares

    0.67% of the 13F portfolio, value $59,684,800.

    13F-HR 0001114618-26-000002 filed by GATEWAY INVESTMENT ADVISERS LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  4. period ended2025-12-31
    13F 365,000 shares
    Change vs previous 13F not available

    0.59% of the 13F portfolio, value $63,524,600.

    13F-HR 0001114618-26-000001 filed by GATEWAY INVESTMENT ADVISERS LLC
    Filed (acceptance time not in the bulk data set), ingested

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