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Disclosery

George Kaiser Family Foundation: BRK-B position timeline

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

George Kaiser Family Foundation held 2,672 BRK-B 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 2,672 shares
    Change vs previous 13F +1,823 shares

    0.13% of the 13F portfolio, value $1,337,042.

    13F-HR 0001140361-26-032433 filed by George Kaiser Family Foundation
    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 849 shares
    Change vs previous 13F 0 shares

    0.05% of the 13F portfolio, value $406,841.

    13F-HR 0001140361-26-021109 filed by George Kaiser Family Foundation
    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 849 shares
    Change vs previous 13F 0 shares

    0.06% of the 13F portfolio, value $426,750.

    13F-HR 0001140361-26-004584 filed by George Kaiser Family Foundation
    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 849 shares
    Change vs previous 13F 0 shares

    0.06% of the 13F portfolio, value $426,826.

    13F-HR 0001140361-25-041634 filed by George Kaiser Family Foundation
    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 849 shares
    Change vs previous 13F +252 shares

    0.06% of the 13F portfolio, value $412,419.

    13F-HR 0001140361-25-031079 filed by George Kaiser Family Foundation
    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 597 shares
    Change vs previous 13F not available

    0.05% of the 13F portfolio, value $317,950.

    13F-HR 0001140361-25-018703 filed by George Kaiser Family Foundation
    Filed (acceptance time not in the bulk data set), ingested

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