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Disclosery

GAMCO Investors (Gabelli): BOOM position timeline

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

GAMCO Investors (Gabelli) held 58,500 BOOM 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 58,500 shares
    Change vs previous 13F -45,626 shares

    <0.01% of the 13F portfolio, value $339,885.

    13F-HR 0001140361-26-032509 filed by GABELLI FUNDS LLC
    Filed (acceptance time not in the bulk data set), ingested

    • GABELLI & Co INVESTMENT ADVISERS, INC.: 0 shares
    • GABELLI FUNDS LLC: 58,500 shares

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

  2. period ended2026-03-31
    13F 104,126 shares
    Change vs previous 13F -115,554 shares

    <0.01% of the 13F portfolio, value $542,496.

    13F-HR 0001140361-26-021337 filed by GABELLI FUNDS LLC
    Filed (acceptance time not in the bulk data set), ingested

    • GABELLI & Co INVESTMENT ADVISERS, INC.: 21,630 shares
    • GABELLI FUNDS LLC: 82,496 shares

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

  3. period ended2025-12-31
    13F 219,680 shares
    Change vs previous 13F -30,000 shares

    0.01% of the 13F portfolio, value $1,469,660.

    13F-HR 0001140361-26-003893 filed by GABELLI FUNDS LLC
    Filed (acceptance time not in the bulk data set), ingested

    • GABELLI & Co INVESTMENT ADVISERS, INC.: 80,550 shares
    • GABELLI FUNDS LLC: 139,130 shares

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

  4. period ended2025-09-30
    13F 249,680 shares
    Change vs previous 13F -39,277 shares

    0.01% of the 13F portfolio, value $2,109,797.

    13F-HR 0001140361-25-041671 filed by GABELLI FUNDS LLC
    Filed (acceptance time not in the bulk data set), ingested

    • GABELLI & Co INVESTMENT ADVISERS, INC.: 97,850 shares
    • GABELLI FUNDS LLC: 151,830 shares

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

  5. period ended2025-06-30
    13F 288,957 shares
    Change vs previous 13F +15,492 shares

    0.02% of the 13F portfolio, value $2,328,993.

    13F-HR 0001140361-25-030816 filed by GABELLI FUNDS LLC
    Filed (acceptance time not in the bulk data set), ingested

    • GABELLI & Co INVESTMENT ADVISERS, INC.: 122,700 shares
    • GABELLI FUNDS LLC: 166,257 shares

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

  6. period ended2025-03-31
    13F 273,465 shares
    Change vs previous 13F +230,665 shares

    0.02% of the 13F portfolio, value $2,302,575.

    13F-HR 0001140361-25-018974 filed by GABELLI FUNDS LLC
    Filed (acceptance time not in the bulk data set), ingested

    • GABELLI & Co INVESTMENT ADVISERS, INC.: 115,650 shares
    • GABELLI FUNDS LLC: 157,815 shares

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

  7. period ended2024-12-31
    13F 42,800 shares
    Change vs previous 13F +5,300 shares

    <0.01% of the 13F portfolio, value $314,580.

    13F-HR 0001140361-25-004328 filed by GABELLI FUNDS LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  8. period ended2024-09-30
    13F 37,500 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $486,750.

    13F-HR 0001140361-24-046503 filed by GABELLI FUNDS LLC
    Filed (acceptance time not in the bulk data set), ingested

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