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GAMCO Investors (Gabelli): MRK position timeline

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

GAMCO Investors (Gabelli) held 354,072 MRK 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 354,072 shares
    Change vs previous 13F -1,877 shares

    0.17% of the 13F portfolio, value $45,498,252.

    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: 62,672 shares
    • GABELLI & Co INVESTMENT ADVISERS, INC.: 2,700 shares
    • GABELLI FUNDS LLC: 288,700 shares

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

  2. period ended2026-03-31
    13F 355,949 shares
    Change vs previous 13F -15,789 shares

    0.17% of the 13F portfolio, value $42,817,105.

    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: 64,769 shares
    • GABELLI & Co INVESTMENT ADVISERS, INC.: 2,700 shares
    • GABELLI FUNDS LLC: 288,480 shares

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

  3. period ended2025-12-31
    13F 371,738 shares
    Change vs previous 13F -19,760 shares

    0.15% of the 13F portfolio, value $39,129,142.

    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: 64,973 shares
    • GABELLI & Co INVESTMENT ADVISERS, INC.: 2,700 shares
    • GABELLI FUNDS LLC: 304,065 shares

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

  4. period ended2025-09-30
    13F 391,498 shares
    Change vs previous 13F -6,816 shares

    0.13% of the 13F portfolio, value $32,858,427.

    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: 63,058 shares
    • GABELLI & Co INVESTMENT ADVISERS, INC.: 3,000 shares
    • GABELLI FUNDS LLC: 325,440 shares

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

  5. period ended2025-06-30
    13F 398,314 shares
    Change vs previous 13F -26,931 shares

    0.13% of the 13F portfolio, value $31,530,536.

    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: 69,199 shares
    • GABELLI & Co INVESTMENT ADVISERS, INC.: 3,000 shares
    • GABELLI FUNDS LLC: 326,115 shares

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

  6. period ended2025-03-31
    13F 425,245 shares
    Change vs previous 13F -8,123 shares

    0.17% of the 13F portfolio, value $38,169,991.

    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: 72,630 shares
    • GABELLI & Co INVESTMENT ADVISERS, INC.: 3,000 shares
    • GABELLI FUNDS LLC: 349,615 shares

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

  7. period ended2024-12-31
    13F 433,368 shares
    Change vs previous 13F +17,304 shares

    0.19% of the 13F portfolio, value $43,111,448.

    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: 79,163 shares
    • GABELLI FUNDS LLC: 354,205 shares

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

  8. period ended2024-09-30
    13F 416,064 shares
    Change vs previous 13F not available

    0.2% of the 13F portfolio, value $47,248,228.

    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: 80,943 shares
    • GABELLI FUNDS LLC: 335,121 shares

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