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GAMCO Investors (Gabelli): WM position timeline

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

GAMCO Investors (Gabelli) held 302,043 WM 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 302,043 shares
    Change vs previous 13F -3,472 shares

    0.25% of the 13F portfolio, value $67,319,344.

    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: 125,843 shares
    • GABELLI FUNDS LLC: 176,200 shares

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

  2. period ended2026-03-31
    13F 305,515 shares
    Change vs previous 13F -7,606 shares

    0.28% of the 13F portfolio, value $70,204,292.

    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: 126,645 shares
    • GABELLI FUNDS LLC: 178,870 shares

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

  3. period ended2025-12-31
    13F 313,121 shares
    Change vs previous 13F +696 shares

    0.27% of the 13F portfolio, value $68,795,815.

    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: 133,828 shares
    • GABELLI FUNDS LLC: 179,293 shares

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

  4. period ended2025-09-30
    13F 312,425 shares
    Change vs previous 13F -5,158 shares

    0.28% of the 13F portfolio, value $68,992,813.

    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: 132,513 shares
    • GABELLI FUNDS LLC: 179,912 shares

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

  5. period ended2025-06-30
    13F 317,583 shares
    Change vs previous 13F -11,005 shares

    0.3% of the 13F portfolio, value $72,669,342.

    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: 138,196 shares
    • GABELLI FUNDS LLC: 179,387 shares

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

  6. period ended2025-03-31
    13F 328,588 shares
    Change vs previous 13F -7,434 shares

    0.34% of the 13F portfolio, value $76,071,408.

    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: 142,716 shares
    • GABELLI FUNDS LLC: 185,872 shares

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

  7. period ended2024-12-31
    13F 336,022 shares
    Change vs previous 13F -18,244 shares

    0.3% of the 13F portfolio, value $67,805,879.

    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: 148,822 shares
    • GABELLI FUNDS LLC: 187,200 shares

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

  8. period ended2024-09-30
    13F 354,266 shares
    Change vs previous 13F not available

    0.31% of the 13F portfolio, value $73,545,622.

    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: 155,666 shares
    • GABELLI FUNDS LLC: 198,600 shares

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