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GAMCO Investors (Gabelli): CMS position timeline

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

GAMCO Investors (Gabelli) held 214,042 CMS 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 214,042 shares
    Change vs previous 13F -777 shares

    0.06% of the 13F portfolio, value $16,374,213.

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

    • GAMCO INVESTORS, INC. ET AL: 24,600 shares
    • GABELLI FUNDS LLC: 189,442 shares

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

  2. period ended2026-03-31
    13F 214,819 shares
    Change vs previous 13F +2 shares

    0.07% of the 13F portfolio, value $16,665,658.

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

    • GAMCO INVESTORS, INC. ET AL: 25,202 shares
    • GABELLI FUNDS LLC: 189,617 shares

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

  3. period ended2025-12-31
    13F 214,817 shares
    Change vs previous 13F -1,750 shares

    0.06% of the 13F portfolio, value $15,022,153.

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

    • GAMCO INVESTORS, INC. ET AL: 25,200 shares
    • GABELLI FUNDS LLC: 189,617 shares

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

  4. period ended2025-09-30
    13F 216,567 shares
    Change vs previous 13F -600 shares

    0.06% of the 13F portfolio, value $15,865,698.

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

    • GAMCO INVESTORS, INC. ET AL: 26,950 shares
    • GABELLI FUNDS LLC: 189,617 shares

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

  5. period ended2025-06-30
    13F 217,167 shares
    Change vs previous 13F 0 shares

    0.06% of the 13F portfolio, value $15,045,330.

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

    • GAMCO INVESTORS, INC. ET AL: 26,950 shares
    • GABELLI FUNDS LLC: 190,217 shares

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

  6. period ended2025-03-31
    13F 217,167 shares
    Change vs previous 13F -1,600 shares

    0.07% of the 13F portfolio, value $16,311,414.

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

    • GAMCO INVESTORS, INC. ET AL: 26,950 shares
    • GABELLI FUNDS LLC: 190,217 shares

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

  7. period ended2024-12-31
    13F 218,767 shares
    Change vs previous 13F -100 shares

    0.06% of the 13F portfolio, value $14,580,821.

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

    • GAMCO INVESTORS, INC. ET AL: 27,450 shares
    • GABELLI FUNDS LLC: 191,317 shares

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

  8. period ended2024-09-30
    13F 218,867 shares
    Change vs previous 13F not available

    0.07% of the 13F portfolio, value $15,458,577.

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

    • GAMCO INVESTORS, INC. ET AL: 27,550 shares
    • GABELLI FUNDS LLC: 191,317 shares

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