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GAMCO Investors (Gabelli): ATRO position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of GAMCO Investors (Gabelli) on ATRO, newest first. How the timeline and the estimate are built.

GAMCO Investors (Gabelli) held 60,813 ATRO shares at 2026-06-30 per its 13F-HR filed 2026-08-12.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 60,813 shares
    Change vs previous 13F -2,965 shares

    0.02% of the 13F portfolio, value $4,941,664.

    13F-HR 0001140361-26-032509 filed by GABELLI FUNDS LLC
    Filed (acceptance time not in the bulk data set), ingested

    • GAMCO INVESTORS, INC. ET AL: 20,798 shares
    • GABELLI FUNDS LLC: 40,015 shares

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

  2. period ended2026-03-31
    13F 63,778 shares
    Change vs previous 13F +2,415 shares

    0.02% of the 13F portfolio, value $4,255,906.

    13F-HR 0001140361-26-021337 filed by GABELLI FUNDS LLC
    Filed (acceptance time not in the bulk data set), ingested

    • GAMCO INVESTORS, INC. ET AL: 26,798 shares
    • GABELLI FUNDS LLC: 36,980 shares

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

  3. period ended2025-12-31
    13F 61,363 shares
    Change vs previous 13F -461 shares

    0.01% of the 13F portfolio, value $3,328,330.

    13F-HR 0001140361-26-003893 filed by GABELLI FUNDS LLC
    Filed (acceptance time not in the bulk data set), ingested

    • GAMCO INVESTORS, INC. ET AL: 27,298 shares
    • GABELLI FUNDS LLC: 34,065 shares

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

  4. period ended2025-09-30
    13F 61,824 shares
    Change vs previous 13F -11,300 shares

    0.01% of the 13F portfolio, value $2,819,793.

    13F-HR 0001140361-25-041671 filed by GABELLI FUNDS LLC
    Filed (acceptance time not in the bulk data set), ingested

    • GAMCO INVESTORS, INC. ET AL: 20,498 shares
    • GABELLI FUNDS LLC: 41,326 shares

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

  5. period ended2025-06-30
    13F 73,124 shares
    Change vs previous 13F -2,602 shares

    0.01% of the 13F portfolio, value $2,448,191.

    13F-HR 0001140361-25-030816 filed by GABELLI FUNDS LLC
    Filed (acceptance time not in the bulk data set), ingested

    • GAMCO INVESTORS, INC. ET AL: 20,798 shares
    • GABELLI FUNDS LLC: 52,326 shares

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

  6. period ended2025-03-31
    13F 75,726 shares
    Change vs previous 13F -7,900 shares

    0.01% of the 13F portfolio, value $1,830,297.

    13F-HR 0001140361-25-018974 filed by GABELLI FUNDS LLC
    Filed (acceptance time not in the bulk data set), ingested

    • GAMCO INVESTORS, INC. ET AL: 18,400 shares
    • GABELLI FUNDS LLC: 57,326 shares

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

  7. period ended2024-12-31
    13F 83,626 shares
    Change vs previous 13F +18,500 shares

    0.01% of the 13F portfolio, value $1,334,671.

    13F-HR 0001140361-25-004328 filed by GABELLI FUNDS LLC
    Filed (acceptance time not in the bulk data set), ingested

    • GAMCO INVESTORS, INC. ET AL: 16,300 shares
    • GABELLI FUNDS LLC: 67,326 shares

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

  8. period ended2024-09-30
    13F 65,126 shares
    Change vs previous 13F not available

    0.01% of the 13F portfolio, value $1,268,654.

    13F-HR 0001140361-24-046503 filed by GABELLI FUNDS LLC
    Filed (acceptance time not in the bulk data set), ingested

    • GAMCO INVESTORS, INC. ET AL: 12,800 shares
    • GABELLI FUNDS LLC: 52,326 shares

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