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Disclosery

GAMCO Investors (Gabelli): ATKR position timeline

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

GAMCO Investors (Gabelli) held 4,484 ATKR 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 4,484 shares
    Change vs previous 13F 0 shares

    <0.01% of the 13F portfolio, value $340,963.

    13F-HR 0001140361-26-032508 filed by GAMCO INVESTORS, INC. ET AL
    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 4,484 shares
    Change vs previous 13F -400 shares

    <0.01% of the 13F portfolio, value $264,152.

    13F-HR 0001140361-26-021334 filed by GAMCO INVESTORS, INC. ET AL
    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 4,884 shares
    Change vs previous 13F -700 shares

    <0.01% of the 13F portfolio, value $308,913.

    13F-HR 0001140361-26-003895 filed by GAMCO INVESTORS, INC. ET AL
    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 5,584 shares
    Change vs previous 13F -550 shares

    <0.01% of the 13F portfolio, value $350,340.

    13F-HR 0001140361-25-041670 filed by GAMCO INVESTORS, INC. ET AL
    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 6,134 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $432,754.

    13F-HR 0001140361-25-030814 filed by GAMCO INVESTORS, INC. ET AL
    Filed (acceptance time not in the bulk data set), ingested

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