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GAMCO Investors (Gabelli): ROK position timeline

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

GAMCO Investors (Gabelli) held 196,449 ROK 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 196,449 shares
    Change vs previous 13F -4,547 shares

    0.36% of the 13F portfolio, value $97,257,971.

    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: 111,389 shares
    • GABELLI FUNDS LLC: 85,060 shares

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

  2. period ended2026-03-31
    13F 200,996 shares
    Change vs previous 13F +52 shares

    0.29% of the 13F portfolio, value $72,133,444.

    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: 113,606 shares
    • GABELLI FUNDS LLC: 87,390 shares

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

  3. period ended2025-12-31
    13F 200,944 shares
    Change vs previous 13F -2,179 shares

    0.31% of the 13F portfolio, value $78,181,282.

    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: 113,664 shares
    • GABELLI FUNDS LLC: 87,280 shares

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

  4. period ended2025-09-30
    13F 203,123 shares
    Change vs previous 13F -4,565 shares

    0.28% of the 13F portfolio, value $70,997,582.

    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: 113,546 shares
    • GABELLI FUNDS LLC: 89,577 shares

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

  5. period ended2025-06-30
    13F 207,688 shares
    Change vs previous 13F -6,571 shares

    0.28% of the 13F portfolio, value $68,987,723.

    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: 115,626 shares
    • GABELLI FUNDS LLC: 92,062 shares

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

  6. period ended2025-03-31
    13F 214,259 shares
    Change vs previous 13F -11,673 shares

    0.25% of the 13F portfolio, value $55,360,240.

    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: 117,972 shares
    • GABELLI FUNDS LLC: 96,287 shares

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

  7. period ended2024-12-31
    13F 225,932 shares
    Change vs previous 13F -6,971 shares

    0.28% of the 13F portfolio, value $64,569,106.

    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: 119,495 shares
    • GABELLI FUNDS LLC: 106,437 shares

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

  8. period ended2024-09-30
    13F 232,903 shares
    Change vs previous 13F not available

    0.26% of the 13F portfolio, value $62,525,140.

    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: 121,541 shares
    • GABELLI FUNDS LLC: 111,362 shares

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