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GAMCO Investors (Gabelli): DCO position timeline

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

GAMCO Investors (Gabelli) held 525,059 DCO 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 525,059 shares
    Change vs previous 13F -25,467 shares

    0.36% of the 13F portfolio, value $97,246,178.

    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: 427,832 shares
    • GABELLI FUNDS LLC: 97,227 shares

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

  2. period ended2026-03-31
    13F 550,526 shares
    Change vs previous 13F -70,490 shares

    0.27% of the 13F portfolio, value $67,164,172.

    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: 449,461 shares
    • GABELLI FUNDS LLC: 101,065 shares

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

  3. period ended2025-12-31
    13F 621,016 shares
    Change vs previous 13F -35,024 shares

    0.23% of the 13F portfolio, value $59,077,252.

    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: 517,100 shares
    • GABELLI & Co INVESTMENT ADVISERS, INC.: 0 shares
    • GABELLI FUNDS LLC: 103,916 shares

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

  4. period ended2025-09-30
    13F 656,040 shares
    Change vs previous 13F -76,495 shares

    0.25% of the 13F portfolio, value $63,065,125.

    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: 550,416 shares
    • GABELLI & Co INVESTMENT ADVISERS, INC.: 2,900 shares
    • GABELLI FUNDS LLC: 102,724 shares

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

  5. period ended2025-06-30
    13F 732,535 shares
    Change vs previous 13F +41,883 shares

    0.24% of the 13F portfolio, value $60,529,367.

    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: 626,611 shares
    • GABELLI & Co INVESTMENT ADVISERS, INC.: 2,900 shares
    • GABELLI FUNDS LLC: 103,024 shares

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

  6. period ended2025-03-31
    13F 690,652 shares
    Change vs previous 13F +22,807 shares

    0.18% of the 13F portfolio, value $40,078,535.

    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: 588,278 shares
    • GABELLI FUNDS LLC: 102,374 shares

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

  7. period ended2024-12-31
    13F 667,845 shares
    Change vs previous 13F +15,960 shares

    0.19% of the 13F portfolio, value $42,515,013.

    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: 581,706 shares
    • GABELLI FUNDS LLC: 86,139 shares

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

  8. period ended2024-09-30
    13F 651,885 shares
    Change vs previous 13F not available

    0.18% of the 13F portfolio, value $42,913,590.

    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: 569,872 shares
    • GABELLI FUNDS LLC: 82,013 shares

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