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GAMCO Investors (Gabelli): MPX position timeline

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

GAMCO Investors (Gabelli) held 0 MPX 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 0 shares
    Change vs previous 13F -741,071 shares

    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: 0 shares
    • GABELLI FUNDS LLC: 0 shares

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

    Exited: the 13F for this period no longer lists the position.

  2. period ended2026-03-31
    13F 741,071 shares
    Change vs previous 13F +9,083 shares

    0.02% of the 13F portfolio, value $5,387,586.

    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: 508,571 shares
    • GABELLI FUNDS LLC: 232,500 shares

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

  3. period ended2025-12-31
    13F 731,988 shares
    Change vs previous 13F -7,085 shares

    0.03% of the 13F portfolio, value $6,412,215.

    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: 499,488 shares
    • GABELLI FUNDS LLC: 232,500 shares

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

  4. period ended2025-09-30
    13F 739,073 shares
    Change vs previous 13F -4,609 shares

    0.03% of the 13F portfolio, value $6,555,578.

    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: 507,073 shares
    • GABELLI FUNDS LLC: 232,000 shares

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

  5. period ended2025-06-30
    13F 743,682 shares
    Change vs previous 13F +499 shares

    0.03% of the 13F portfolio, value $6,328,734.

    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: 511,682 shares
    • GABELLI FUNDS LLC: 232,000 shares

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

  6. period ended2025-03-31
    13F 743,183 shares
    Change vs previous 13F -1,324 shares

    0.03% of the 13F portfolio, value $6,235,305.

    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: 512,183 shares
    • GABELLI FUNDS LLC: 231,000 shares

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

  7. period ended2024-12-31
    13F 744,507 shares
    Change vs previous 13F +1,898 shares

    0.03% of the 13F portfolio, value $6,827,129.

    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: 514,007 shares
    • GABELLI FUNDS LLC: 230,500 shares

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

  8. period ended2024-09-30
    13F 742,609 shares
    Change vs previous 13F not available

    0.03% of the 13F portfolio, value $7,195,881.

    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: 512,609 shares
    • GABELLI FUNDS LLC: 230,000 shares

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