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GAMCO Investors (Gabelli): MGNI position timeline

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

GAMCO Investors (Gabelli) held 113,921 MGNI 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 113,921 shares
    Change vs previous 13F +7,448 shares

    0.01% of the 13F portfolio, value $2,162,221.

    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: 63,101 shares
    • GABELLI FUNDS LLC: 50,820 shares

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

  2. period ended2026-03-31
    13F 106,473 shares
    Change vs previous 13F +31,174 shares

    0.01% of the 13F portfolio, value $1,264,900.

    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: 60,653 shares
    • GABELLI FUNDS LLC: 45,820 shares

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

  3. period ended2025-12-31
    13F 75,299 shares
    Change vs previous 13F +8,010 shares

    <0.01% of the 13F portfolio, value $1,222,103.

    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: 44,479 shares
    • GABELLI FUNDS LLC: 30,820 shares

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

  4. period ended2025-09-30
    13F 67,289 shares
    Change vs previous 13F -3,114 shares

    0.01% of the 13F portfolio, value $1,465,555.

    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: 56,469 shares
    • GABELLI FUNDS LLC: 10,820 shares

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

  5. period ended2025-06-30
    13F 70,403 shares
    Change vs previous 13F -19,203 shares

    0.01% of the 13F portfolio, value $1,698,120.

    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: 59,583 shares
    • GABELLI FUNDS LLC: 10,820 shares

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

  6. period ended2025-03-31
    13F 89,606 shares
    Change vs previous 13F -5,846 shares

    <0.01% of the 13F portfolio, value $1,022,404.

    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: 78,786 shares
    • GABELLI FUNDS LLC: 10,820 shares

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

  7. period ended2024-12-31
    13F 95,452 shares
    Change vs previous 13F +10,799 shares

    0.01% of the 13F portfolio, value $1,519,595.

    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: 84,632 shares
    • GABELLI FUNDS LLC: 10,820 shares

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

  8. period ended2024-09-30
    13F 84,653 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $1,172,444.

    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: 73,833 shares
    • GABELLI FUNDS LLC: 10,820 shares

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