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GAMCO Investors (Gabelli): PKOH position timeline

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

GAMCO Investors (Gabelli) held 1,721,727 PKOH 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 1,721,727 shares
    Change vs previous 13F -26,595 shares

    0.25% of the 13F portfolio, value $66,200,411.

    13F-HR 0001140361-26-032508 filed by GAMCO INVESTORS, INC. ET AL
    Filed (acceptance time not in the bulk data set), ingested

    • GAMCO INVESTORS, INC. ET AL: 1,225,526 shares
    • GABELLI FUNDS LLC: 496,201 shares

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

  2. period ended2026-03-31
    13F 1,748,322 shares
    Change vs previous 13F -36,500 shares

    0.17% of the 13F portfolio, value $42,029,661.

    13F-HR 0001140361-26-021334 filed by GAMCO INVESTORS, INC. ET AL
    Filed (acceptance time not in the bulk data set), ingested

    • GAMCO INVESTORS, INC. ET AL: 1,236,121 shares
    • GABELLI FUNDS LLC: 512,201 shares

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

  3. period ended2025-12-31
    13F 1,784,822 shares
    Change vs previous 13F +167,291 shares

    0.15% of the 13F portfolio, value $37,374,173.

    13F-HR 0001140361-26-003895 filed by GAMCO INVESTORS, INC. ET AL
    Filed (acceptance time not in the bulk data set), ingested

    • GAMCO INVESTORS, INC. ET AL: 1,272,221 shares
    • GABELLI FUNDS LLC: 512,601 shares

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

  4. period ended2025-09-30
    13F 1,617,531 shares
    Change vs previous 13F +54,061 shares

    0.14% of the 13F portfolio, value $34,356,358.

    13F-HR 0001140361-25-041670 filed by GAMCO INVESTORS, INC. ET AL
    Filed (acceptance time not in the bulk data set), ingested

    • GAMCO INVESTORS, INC. ET AL: 1,115,331 shares
    • GABELLI FUNDS LLC: 502,200 shares

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

  5. period ended2025-06-30
    13F 1,563,470 shares
    Change vs previous 13F +120,893 shares

    0.12% of the 13F portfolio, value $27,923,574.

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

    • GAMCO INVESTORS, INC. ET AL: 1,083,270 shares
    • GABELLI FUNDS LLC: 480,200 shares

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

  6. period ended2025-03-31
    13F 1,442,577 shares
    Change vs previous 13F +4,850 shares

    0.14% of the 13F portfolio, value $31,159,663.

    13F-HR 0001140361-25-018975 filed by GAMCO INVESTORS, INC. ET AL
    Filed (acceptance time not in the bulk data set), ingested

    • GAMCO INVESTORS, INC. ET AL: 964,877 shares
    • GABELLI FUNDS LLC: 477,700 shares

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

  7. period ended2024-12-31
    13F 1,437,727 shares
    Change vs previous 13F +28,204 shares

    0.17% of the 13F portfolio, value $37,769,088.

    13F-HR 0001140361-25-004330 filed by GAMCO INVESTORS, INC. ET AL
    Filed (acceptance time not in the bulk data set), ingested

    • GAMCO INVESTORS, INC. ET AL: 960,127 shares
    • GABELLI FUNDS LLC: 477,600 shares

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

  8. period ended2024-09-30
    13F 1,409,523 shares
    Change vs previous 13F not available

    0.18% of the 13F portfolio, value $43,272,356.

    13F-HR 0001140361-24-046738 filed by GAMCO INVESTORS, INC. ET AL
    Filed (acceptance time not in the bulk data set), ingested

    • GAMCO INVESTORS, INC. ET AL: 931,123 shares
    • GABELLI FUNDS LLC: 478,400 shares

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