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GAMCO Investors (Gabelli): GHM position timeline

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

GAMCO Investors (Gabelli) held 235,495 GHM 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 235,495 shares
    Change vs previous 13F -19,908 shares

    0.11% of the 13F portfolio, value $29,151,927.

    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: 221,907 shares
    • GABELLI FUNDS LLC: 13,588 shares

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

  2. period ended2026-03-31
    13F 255,403 shares
    Change vs previous 13F -11,550 shares

    0.08% of the 13F portfolio, value $20,156,404.

    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: 243,907 shares
    • GABELLI FUNDS LLC: 11,496 shares

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

  3. period ended2025-12-31
    13F 266,953 shares
    Change vs previous 13F -15,750 shares

    0.07% of the 13F portfolio, value $17,146,391.

    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: 253,857 shares
    • GABELLI FUNDS LLC: 13,096 shares

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

  4. period ended2025-09-30
    13F 282,703 shares
    Change vs previous 13F -9,778 shares

    0.06% of the 13F portfolio, value $15,520,394.

    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: 269,407 shares
    • GABELLI FUNDS LLC: 13,296 shares

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

  5. period ended2025-06-30
    13F 292,481 shares
    Change vs previous 13F -3,300 shares

    0.06% of the 13F portfolio, value $14,480,734.

    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: 278,985 shares
    • GABELLI FUNDS LLC: 13,496 shares

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

  6. period ended2025-03-31
    13F 295,781 shares
    Change vs previous 13F +4,450 shares

    0.04% of the 13F portfolio, value $8,524,409.

    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: 281,285 shares
    • GABELLI FUNDS LLC: 14,496 shares

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

  7. period ended2024-12-31
    13F 291,331 shares
    Change vs previous 13F -6,200 shares

    0.06% of the 13F portfolio, value $12,955,489.

    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: 276,435 shares
    • GABELLI FUNDS LLC: 14,896 shares

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

  8. period ended2024-09-30
    13F 297,531 shares
    Change vs previous 13F not available

    0.04% of the 13F portfolio, value $8,803,943.

    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: 281,635 shares
    • GABELLI FUNDS LLC: 15,896 shares

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