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Disclosery

Cornerstone Management, Inc.: BRK-B position timeline

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

Cornerstone Management, Inc. held 15,817 BRK-B 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 15,817 shares
    Change vs previous 13F +190 shares

    1.14% of the 13F portfolio, value $7,914,669.

    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 15,627 shares
    Change vs previous 13F 0 shares

    1.19% of the 13F portfolio, value $7,488,459.

    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 15,627 shares
    Change vs previous 13F -487 shares

    1.28% of the 13F portfolio, value $7,854,912.

    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 16,114 shares
    Change vs previous 13F -113 shares

    1.34% of the 13F portfolio, value $8,101,153.

    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 16,227 shares
    Change vs previous 13F +39 shares

    1.37% of the 13F portfolio, value $7,882,590.

    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 16,188 shares
    Change vs previous 13F 0 shares

    1.61% of the 13F portfolio, value $8,621,406.

    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).

  7. period ended2024-12-31
    13F 16,188 shares
    Change vs previous 13F -693 shares

    1.42% of the 13F portfolio, value $7,337,697.

    13F-HR 0001085146-25-000477 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).

  8. period ended2024-09-30
    13F 16,881 shares
    Change vs previous 13F not available

    1.62% of the 13F portfolio, value $7,769,650.

    13F-HR 0001085146-24-004714 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).