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Disclosery

ACK Asset Management LLC: ATRO position timeline

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

ACK Asset Management LLC held 0 ATRO shares at 2026-03-31 per its 13F-HR filed 2026-05-15.

the latest 13F is the newest step

  1. period ended2026-03-31
    13F 0 shares
    Change vs previous 13F -597,469 shares

    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).

    Exited: the 13F for this period no longer lists the position.

  2. period ended2025-12-31
    13F 597,469 shares
    Change vs previous 13F -632,531 shares

    4.07% of the 13F portfolio, value $32,406,719.

    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).

  3. period ended2025-09-30
    13F 1,230,000 shares
    Change vs previous 13F -830,000 shares

    7.02% of the 13F portfolio, value $56,100,300.

    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).

  4. period ended2025-06-30
    13F 2,060,000 shares
    Change vs previous 13F 0 shares

    9.06% of the 13F portfolio, value $68,968,800.

    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).

  5. period ended2025-03-31
    13F 2,060,000 shares
    Change vs previous 13F 0 shares

    8.18% of the 13F portfolio, value $49,790,200.

    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).

  6. period ended2024-12-31
    13F 2,060,000 shares
    Change vs previous 13F 0 shares

    4.4% of the 13F portfolio, value $32,877,600.

    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).

  7. period ended2024-09-30
    13F 2,060,000 shares
    Change vs previous 13F not available

    4.96% of the 13F portfolio, value $40,128,800.

    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).