Skip to content
Disclosery

Yorktown Management & Research Co Inc: INSM position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Yorktown Management & Research Co Inc on INSM, newest first. How the timeline and the estimate are built.

Yorktown Management & Research Co Inc held 7,925 INSM shares at 2026-06-30 per its 13F-HR filed 2026-07-23.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 7,925 shares
    Change vs previous 13F 0 shares

    0.52% of the 13F portfolio, value $844,964.

    13F-HR 0001193125-26-313433 filed by Yorktown Management & Research Co Inc
    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 7,925 shares
    Change vs previous 13F -1,675 shares

    1.08% of the 13F portfolio, value $1,295,896.

    13F-HR 0001193125-26-162911 filed by Yorktown Management & Research Co Inc
    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 9,600 shares
    Change vs previous 13F 0 shares

    1.34% of the 13F portfolio, value $1,670,784.

    13F-HR 0001193125-26-020430 filed by Yorktown Management & Research Co Inc
    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 9,600 shares
    Change vs previous 13F +3,750 shares

    1.1% of the 13F portfolio, value $1,382,496.

    13F-HR 0001193125-25-255399 filed by Yorktown Management & Research Co Inc
    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 5,850 shares
    Change vs previous 13F 0 shares

    0.56% of the 13F portfolio, value $588,744.

    13F-HR 0000950123-25-006929 filed by Yorktown Management & Research Co Inc
    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 5,850 shares
    Change vs previous 13F -5,120 shares

    0.49% of the 13F portfolio, value $446,297.

    13F-HR 0000950123-25-003639 filed by Yorktown Management & Research Co Inc
    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 10,970 shares
    Change vs previous 13F 0 shares

    0.73% of the 13F portfolio, value $757,369.

    13F-HR 0000950123-25-000592 filed by Yorktown Management & Research Co Inc
    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 10,970 shares
    Change vs previous 13F not available

    0.82% of the 13F portfolio, value $800,810.

    13F-HR 0000950123-24-009915 filed by Yorktown Management & Research Co Inc
    Filed (acceptance time not in the bulk data set), ingested

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