Skip to content
Disclosery

ACK Asset Management LLC: ATS position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of ACK Asset Management LLC on ATS, newest first. How the timeline and the estimate are built.

ACK Asset Management LLC held 1,500,000 ATS shares at 2026-06-30 per its 13F-HR filed 2026-08-13.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 1,500,000 shares
    Change vs previous 13F -346,196 shares

    5.04% of the 13F portfolio, value $43,170,000.

    13F-HR 0001510940-26-000005 filed by ACK Asset Management 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 1,846,196 shares
    Change vs previous 13F 0 shares

    6.5% of the 13F portfolio, value $52,062,727.

    13F-HR 0001510940-26-000004 filed by ACK Asset Management LLC
    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 1,846,196 shares
    Change vs previous 13F 0 shares

    6.38% of the 13F portfolio, value $50,844,238.

    13F-HR 0001510940-26-000001 filed by ACK Asset Management LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  4. period ended2025-09-30
    13F 1,846,196 shares
    Change vs previous 13F 0 shares

    6.05% of the 13F portfolio, value $48,370,335.

    13F-HR 0001510940-25-000006 filed by ACK Asset Management LLC
    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 1,846,196 shares
    Change vs previous 13F -167,000 shares

    7.73% of the 13F portfolio, value $58,856,728.

    13F-HR 0001510940-25-000005 filed by ACK Asset Management LLC
    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 2,013,196 shares
    Change vs previous 13F -80,000 shares

    8.24% of the 13F portfolio, value $50,188,976.

    13F-HR 0001510940-25-000002 filed by ACK Asset Management LLC
    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 2,093,196 shares
    Change vs previous 13F -162,693 shares

    8.55% of the 13F portfolio, value $63,800,614.

    13F-HR 0000899140-25-000241 filed by ACK Asset Management LLC
    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 2,255,889 shares
    Change vs previous 13F not available

    8.1% of the 13F portfolio, value $65,533,575.

    13F-HR 0000899140-24-001197 filed by ACK Asset Management LLC
    Filed (acceptance time not in the bulk data set), ingested

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