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Disclosery

Flagstone Financial Management: BRK-B position timeline

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

Flagstone Financial Management held 12,096 BRK-B shares at 2026-06-30 per its 13F-HR filed 2026-07-21.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 12,096 shares
    Change vs previous 13F -22 shares

    1.35% of the 13F portfolio, value $6,052,726.

    13F-HR 0001754960-26-000572 filed by Flagstone Financial Management
    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 12,118 shares
    Change vs previous 13F -71 shares

    1.44% of the 13F portfolio, value $5,806,947.

    13F-HR 0001754960-26-000338 filed by Flagstone Financial Management
    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 12,189 shares
    Change vs previous 13F -116 shares

    1.57% of the 13F portfolio, value $6,126,808.

    13F-HR 0001754960-26-000161 filed by Flagstone Financial Management
    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 12,305 shares
    Change vs previous 13F +2 shares

    1.63% of the 13F portfolio, value $6,186,216.

    13F-HR 0001754960-25-000744 filed by Flagstone Financial Management
    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 12,303 shares
    Change vs previous 13F +1,070 shares

    1.71% of the 13F portfolio, value $5,976,434.

    13F-HR 0001754960-25-000487 filed by Flagstone Financial Management
    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 11,233 shares
    Change vs previous 13F +133 shares

    1.93% of the 13F portfolio, value $5,982,474.

    13F-HR 0001754960-25-000222 filed by Flagstone Financial Management
    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 11,100 shares
    Change vs previous 13F -263 shares

    1.67% of the 13F portfolio, value $5,031,407.

    13F-HR 0001754960-25-000063 filed by Flagstone Financial Management
    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 11,363 shares
    Change vs previous 13F not available

    1.75% of the 13F portfolio, value $5,229,936.

    13F-HR 0001754960-24-000489 filed by Flagstone Financial Management
    Filed (acceptance time not in the bulk data set), ingested

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