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GAMCO Investors (Gabelli): ACT position timeline

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

GAMCO Investors (Gabelli) held 103,317 ACT 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 103,317 shares
    Change vs previous 13F -927 shares

    0.02% of the 13F portfolio, value $4,722,620.

    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: 18,456 shares
    • GABELLI FUNDS LLC: 84,861 shares

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

  2. period ended2026-03-31
    13F 104,244 shares
    Change vs previous 13F -2,413 shares

    0.02% of the 13F portfolio, value $4,254,198.

    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: 18,823 shares
    • GABELLI FUNDS LLC: 85,421 shares

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

  3. period ended2025-12-31
    13F 106,657 shares
    Change vs previous 13F -267 shares

    0.02% of the 13F portfolio, value $4,227,884.

    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: 18,695 shares
    • GABELLI FUNDS LLC: 87,962 shares

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

  4. period ended2025-09-30
    13F 106,924 shares
    Change vs previous 13F -712 shares

    0.02% of the 13F portfolio, value $4,099,466.

    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: 18,962 shares
    • GABELLI FUNDS LLC: 87,962 shares

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

  5. period ended2025-06-30
    13F 107,636 shares
    Change vs previous 13F not available

    0.02% of the 13F portfolio, value $3,998,677.

    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: 19,133 shares
    • GABELLI FUNDS LLC: 88,503 shares

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