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Disclosery

Cornerstone Planning Group LLC: BRK-B position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Cornerstone Planning Group LLC on BRK-B, newest first. How the timeline and the estimate are built.

Cornerstone Planning Group LLC held 1,231 BRK-B 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 1,231 shares
    Change vs previous 13F +40 shares

    0.08% of the 13F portfolio, value $602,439.

    13F-HR 0001822587-26-000003 filed by Cornerstone Planning Group 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 1,191 shares
    Change vs previous 13F +297 shares

    0.07% of the 13F portfolio, value $554,435.

    13F-HR 0001822587-26-000002 filed by Cornerstone Planning Group 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 894 shares
    Change vs previous 13F -6 shares

    0.07% of the 13F portfolio, value $423,300.

    13F-HR 0001822587-26-000001 filed by Cornerstone Planning Group 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 900 shares
    Change vs previous 13F +62 shares

    0.07% of the 13F portfolio, value $430,668.

    13F-HR 0001822587-25-000005 filed by Cornerstone Planning Group 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 838 shares
    Change vs previous 13F -61 shares

    0.08% of the 13F portfolio, value $388,991.

    13F-HR 0001822587-25-000004 filed by Cornerstone Planning Group 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 899 shares
    Change vs previous 13F +64 shares

    0.11% of the 13F portfolio, value $473,602.

    13F-HR 0001822587-25-000002 filed by Cornerstone Planning Group 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 835 shares
    Change vs previous 13F +21 shares

    0.1% of the 13F portfolio, value $396,375.

    13F-HR 0001822587-25-000001 filed by Cornerstone Planning Group 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 814 shares
    Change vs previous 13F not available

    0.1% of the 13F portfolio, value $370,061.

    13F-HR 0001822587-24-000005 filed by Cornerstone Planning Group LLC
    Filed (acceptance time not in the bulk data set), ingested

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