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GAMCO Investors (Gabelli): TMO position timeline

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

GAMCO Investors (Gabelli) held 20,150 TMO 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 20,150 shares
    Change vs previous 13F +1,047 shares

    0.04% of the 13F portfolio, value $10,102,404.

    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: 4,060 shares
    • GABELLI FUNDS LLC: 16,090 shares

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

  2. period ended2026-03-31
    13F 19,103 shares
    Change vs previous 13F -463 shares

    0.04% of the 13F portfolio, value $9,389,697.

    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: 4,533 shares
    • GABELLI FUNDS LLC: 14,570 shares

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

  3. period ended2025-12-31
    13F 19,566 shares
    Change vs previous 13F -10,235 shares

    0.05% of the 13F portfolio, value $11,337,519.

    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: 4,646 shares
    • GABELLI FUNDS LLC: 14,920 shares

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

  4. period ended2025-09-30
    13F 29,801 shares
    Change vs previous 13F -520 shares

    0.06% of the 13F portfolio, value $14,454,081.

    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: 5,136 shares
    • GABELLI FUNDS LLC: 24,665 shares

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

  5. period ended2025-06-30
    13F 30,321 shares
    Change vs previous 13F +1,372 shares

    0.05% of the 13F portfolio, value $12,293,953.

    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: 5,286 shares
    • GABELLI FUNDS LLC: 25,035 shares

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

  6. period ended2025-03-31
    13F 28,949 shares
    Change vs previous 13F -212 shares

    0.06% of the 13F portfolio, value $14,405,022.

    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: 3,914 shares
    • GABELLI FUNDS LLC: 25,035 shares

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

  7. period ended2024-12-31
    13F 29,161 shares
    Change vs previous 13F -1,036 shares

    0.07% of the 13F portfolio, value $15,170,427.

    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: 4,126 shares
    • GABELLI FUNDS LLC: 25,035 shares

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

  8. period ended2024-09-30
    13F 30,197 shares
    Change vs previous 13F not available

    0.08% of the 13F portfolio, value $18,678,958.

    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: 4,277 shares
    • GABELLI FUNDS LLC: 25,920 shares

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