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GAMCO Investors (Gabelli): OII position timeline

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

GAMCO Investors (Gabelli) held 497,977 OII 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 497,977 shares
    Change vs previous 13F -22,346 shares

    0.08% of the 13F portfolio, value $20,178,028.

    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: 303,898 shares
    • GABELLI FUNDS LLC: 194,079 shares

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

  2. period ended2026-03-31
    13F 520,323 shares
    Change vs previous 13F -8,490 shares

    0.07% of the 13F portfolio, value $18,455,857.

    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: 338,298 shares
    • GABELLI FUNDS LLC: 182,025 shares

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

  3. period ended2025-12-31
    13F 528,813 shares
    Change vs previous 13F +34,008 shares

    0.05% of the 13F portfolio, value $12,707,376.

    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: 341,840 shares
    • GABELLI FUNDS LLC: 186,973 shares

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

  4. period ended2025-09-30
    13F 494,805 shares
    Change vs previous 13F -38,500 shares

    0.05% of the 13F portfolio, value $12,261,268.

    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: 306,440 shares
    • GABELLI FUNDS LLC: 188,365 shares

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

  5. period ended2025-06-30
    13F 533,305 shares
    Change vs previous 13F -10,858 shares

    0.05% of the 13F portfolio, value $11,050,080.

    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: 350,440 shares
    • GABELLI FUNDS LLC: 182,865 shares

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

  6. period ended2025-03-31
    13F 544,163 shares
    Change vs previous 13F -10,850 shares

    0.05% of the 13F portfolio, value $11,868,195.

    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: 370,190 shares
    • GABELLI FUNDS LLC: 173,973 shares

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

  7. period ended2024-12-31
    13F 555,013 shares
    Change vs previous 13F +16,076 shares

    0.06% of the 13F portfolio, value $14,474,739.

    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: 371,040 shares
    • GABELLI FUNDS LLC: 183,973 shares

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

  8. period ended2024-09-30
    13F 538,937 shares
    Change vs previous 13F not available

    0.06% of the 13F portfolio, value $13,403,363.

    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: 344,290 shares
    • GABELLI FUNDS LLC: 194,647 shares

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