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Disclosery

Round Rock Advisors LLC: CMCSA position timeline

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

Round Rock Advisors LLC held 14,120 CMCSA 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 14,120 shares
    Change vs previous 13F -5,349 shares

    0.04% of the 13F portfolio, value $346,646.

    13F-HR 0001951757-26-001257 filed by Round Rock Advisors 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 19,469 shares
    Change vs previous 13F -74 shares

    0.09% of the 13F portfolio, value $558,955.

    13F-HR 0001951757-26-000878 filed by Round Rock Advisors 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/A 19,543 shares
    Change vs previous 13F -11,511 shares

    0.09% of the 13F portfolio, value $584,140.

    13F-HR/A 0001951757-26-000520 filed by Round Rock Advisors 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 31,054 shares
    Change vs previous 13F -8,600 shares

    0.15% of the 13F portfolio, value $975,717.

    13F-HR 0001951757-25-001443 filed by Round Rock Advisors 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 39,654 shares
    Change vs previous 13F -70 shares

    0.24% of the 13F portfolio, value $1,415,251.

    13F-HR 0001951757-25-001039 filed by Round Rock Advisors 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 39,724 shares
    Change vs previous 13F -151 shares

    0.27% of the 13F portfolio, value $1,465,816.

    13F-HR 0001951757-25-000487 filed by Round Rock Advisors 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 39,875 shares
    Change vs previous 13F -7,467 shares

    0.31% of the 13F portfolio, value $1,496,509.

    13F-HR 0001951757-25-000115 filed by Round Rock Advisors 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 47,342 shares
    Change vs previous 13F not available

    0.46% of the 13F portfolio, value $1,977,475.

    13F-HR 0001951757-24-001162 filed by Round Rock Advisors LLC
    Filed (acceptance time not in the bulk data set), ingested

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