Skip to content
Disclosery

Cornerstone Management, Inc.: BRK-A position timeline

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

Cornerstone Management, Inc. held 11 BRK-A shares at 2026-06-30 per its 13F-HR filed 2026-07-16.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 11 shares
    Change vs previous 13F 0 shares

    1.19% of the 13F portfolio, value $8,237,350.

    13F-HR 0002085853-26-000754 filed by Cornerstone Management, Inc.
    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 11 shares
    Change vs previous 13F 0 shares

    1.26% of the 13F portfolio, value $7,899,540.

    13F-HR 0002085853-26-000394 filed by Cornerstone Management, Inc.
    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 11 shares
    Change vs previous 13F 0 shares

    1.35% of the 13F portfolio, value $8,302,800.

    13F-HR 0002085853-26-000208 filed by Cornerstone Management, Inc.
    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 shares
    Change vs previous 13F 0 shares

    1.37% of the 13F portfolio, value $8,296,200.

    13F-HR 0002085853-25-000066 filed by Cornerstone Management, Inc.
    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 11 shares
    Change vs previous 13F 0 shares

    1.39% of the 13F portfolio, value $8,016,800.

    13F-HR 0001085146-25-004337 filed by Cornerstone Management, Inc.
    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 11 shares
    Change vs previous 13F not available

    1.64% of the 13F portfolio, value $8,782,858.

    13F-HR 0001085146-25-002220 filed by Cornerstone Management, Inc.
    Filed (acceptance time not in the bulk data set), ingested

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