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Disclosery

Main Street Research LLC: CMCSA position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Main Street Research LLC on CMCSA, newest first. How the timeline and the estimate are built.

Main Street Research LLC held 11,037 CMCSA shares at 2026-06-30 per its 13F-HR filed 2026-07-29.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 11,037 shares
    Change vs previous 13F -2,483 shares

    0.01% of the 13F portfolio, value $270,958.

    13F-HR 0001420506-26-001335 filed by Main Street Research LLC
    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 13,520 shares
    Change vs previous 13F +2,608 shares

    0.02% of the 13F portfolio, value $388,159.

    13F-HR 0001420506-26-000773 filed by Main Street Research LLC
    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 10,912 shares
    Change vs previous 13F -311 shares

    0.02% of the 13F portfolio, value $326,160.

    13F-HR 0001420506-26-000210 filed by Main Street Research LLC
    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 11,223 shares
    Change vs previous 13F +851 shares

    0.02% of the 13F portfolio, value $352,627.

    13F-HR 0001420506-25-003188 filed by Main Street Research LLC
    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 10,372 shares
    Change vs previous 13F 0 shares

    0.02% of the 13F portfolio, value $370,177.

    13F-HR 0001420506-25-001710 filed by Main Street Research LLC
    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 10,372 shares
    Change vs previous 13F 0 shares

    0.03% of the 13F portfolio, value $382,727.

    13F-HR 0001420506-25-000840 filed by Main Street Research LLC
    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 10,372 shares
    Change vs previous 13F 0 shares

    0.02% of the 13F portfolio, value $389,261.

    13F-HR 0001420506-25-000201 filed by Main Street Research LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  8. period ended2024-09-30
    13F 10,372 shares
    Change vs previous 13F not available

    0.03% of the 13F portfolio, value $433,238.

    13F-HR 0001941040-24-000499 filed by Main Street Research LLC
    Filed (acceptance time not in the bulk data set), ingested

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