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GAMCO Investors (Gabelli): MPC position timeline

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

GAMCO Investors (Gabelli) held 213,158 MPC 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 213,158 shares
    Change vs previous 13F -8,816 shares

    0.2% of the 13F portfolio, value $54,498,106.

    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: 6,958 shares
    • GABELLI FUNDS LLC: 206,200 shares

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

  2. period ended2026-03-31
    13F 221,974 shares
    Change vs previous 13F -15,062 shares

    0.22% of the 13F portfolio, value $54,201,611.

    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: 6,974 shares
    • GABELLI FUNDS LLC: 215,000 shares

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

  3. period ended2025-12-31
    13F 237,036 shares
    Change vs previous 13F +29,918 shares

    0.15% of the 13F portfolio, value $38,549,165.

    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: 6,136 shares
    • GABELLI FUNDS LLC: 230,900 shares

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

  4. period ended2025-09-30
    13F 207,118 shares
    Change vs previous 13F -29,702 shares

    0.16% of the 13F portfolio, value $39,919,923.

    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: 7,418 shares
    • GABELLI FUNDS LLC: 199,700 shares

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

  5. period ended2025-06-30
    13F 236,820 shares
    Change vs previous 13F +3,125 shares

    0.16% of the 13F portfolio, value $39,338,170.

    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: 8,020 shares
    • GABELLI FUNDS LLC: 228,800 shares

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

  6. period ended2025-03-31
    13F 233,695 shares
    Change vs previous 13F -2,260 shares

    0.15% of the 13F portfolio, value $34,047,025.

    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: 1,595 shares
    • GABELLI FUNDS LLC: 232,100 shares

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

  7. period ended2024-12-31
    13F 235,955 shares
    Change vs previous 13F -6,236 shares

    0.14% of the 13F portfolio, value $32,915,723.

    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: 1,755 shares
    • GABELLI FUNDS LLC: 234,200 shares

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

  8. period ended2024-09-30
    13F 242,191 shares
    Change vs previous 13F not available

    0.17% of the 13F portfolio, value $39,455,336.

    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: 1,941 shares
    • GABELLI FUNDS LLC: 240,250 shares

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