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POTOMAC FUND MANAGEMENT INC /ADV: CMCSA position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of POTOMAC FUND MANAGEMENT INC /ADV on CMCSA, newest first. How the timeline and the estimate are built.

POTOMAC FUND MANAGEMENT INC /ADV held 49,643 CMCSA shares at 2026-06-30 per its 13F-HR filed 2026-08-13.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 49,643 shares
    Change vs previous 13F -4,354 shares

    0.03% of the 13F portfolio, value $1,218,741.

    13F-HR 0000826000-26-000007 filed by POTOMAC FUND MANAGEMENT INC /ADV
    Filed (acceptance time not in the bulk data set), ingested

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

  2. period ended2026-03-31
    13F 53,997 shares
    Change vs previous 13F +3,635 shares

    0.05% of the 13F portfolio, value $1,550,251.

    13F-HR 0000826000-26-000005 filed by POTOMAC FUND MANAGEMENT INC /ADV
    Filed (acceptance time not in the bulk data set), ingested

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

  3. period ended2025-12-31
    13F 50,362 shares
    Change vs previous 13F +3,195 shares

    0.06% of the 13F portfolio, value $1,505,330.

    13F-HR 0000826000-26-000003 filed by POTOMAC FUND MANAGEMENT INC /ADV
    Filed (acceptance time not in the bulk data set), ingested

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

  4. period ended2025-09-30
    13F 47,167 shares
    Change vs previous 13F +26 shares

    0.06% of the 13F portfolio, value $1,481,998.

    13F-HR 0000826000-25-000012 filed by POTOMAC FUND MANAGEMENT INC /ADV
    Filed (acceptance time not in the bulk data set), ingested

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

  5. period ended2025-06-30
    13F/A 47,141 shares
    Change vs previous 13F +2,173 shares

    0.09% of the 13F portfolio, value $1,621,663.

    13F-HR/A 0000826000-25-000010 filed by POTOMAC FUND MANAGEMENT INC /ADV
    Filed (acceptance time not in the bulk data set), ingested

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

  6. period ended2025-03-31
    13F/A 44,968 shares
    Change vs previous 13F +5,876 shares

    0.66% of the 13F portfolio, value $1,510,928.

    13F-HR/A 0000826000-25-000009 filed by POTOMAC FUND MANAGEMENT INC /ADV
    Filed (acceptance time not in the bulk data set), ingested

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

  7. period ended2024-12-31
    13F/A 39,092 shares
    Change vs previous 13F not available

    0.09% of the 13F portfolio, value $1,467,105.

    13F-HR/A 0000826000-25-000008 filed by POTOMAC FUND MANAGEMENT INC /ADV
    Filed (acceptance time not in the bulk data set), ingested

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