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Disclosery

Rosenberg Matthew Hamilton: BRK-B position timeline

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

Rosenberg Matthew Hamilton held 2,010 BRK-B shares at 2026-09-30 per its 13F-HR filed 2026-10-05.

the latest 13F is the newest step

  1. period ended2026-09-30
    13F 2,010 shares
    Change vs previous 13F +37 shares

    0.18% of the 13F portfolio, value $1,000,880.

    13F-HR 0001812103-26-000005 filed by Rosenberg Matthew Hamilton
    Accepted , ingested

  2. period ended2026-06-30
    13F 1,973 shares
    Change vs previous 13F -86 shares

    0.18% of the 13F portfolio, value $987,269.

    13F-HR 0001812103-26-000003 filed by Rosenberg Matthew Hamilton
    Filed (acceptance time not in the bulk data set), ingested

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

  3. period ended2026-03-31
    13F 2,059 shares
    Change vs previous 13F -25 shares

    0.2% of the 13F portfolio, value $986,673.

    13F-HR 0001812103-26-000002 filed by Rosenberg Matthew Hamilton
    Filed (acceptance time not in the bulk data set), ingested

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

  4. period ended2025-12-31
    13F 2,084 shares
    Change vs previous 13F +125 shares

    0.22% of the 13F portfolio, value $1,047,523.

    13F-HR 0001812103-26-000001 filed by Rosenberg Matthew Hamilton
    Filed (acceptance time not in the bulk data set), ingested

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

  5. period ended2025-09-30
    13F 1,959 shares
    Change vs previous 13F +70 shares

    0.21% of the 13F portfolio, value $984,868.

    13F-HR 0001812103-25-000006 filed by Rosenberg Matthew Hamilton
    Filed (acceptance time not in the bulk data set), ingested

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

  6. period ended2025-06-30
    13F 1,889 shares
    Change vs previous 13F +28 shares

    0.21% of the 13F portfolio, value $917,620.

    13F-HR 0001812103-25-000004 filed by Rosenberg Matthew Hamilton
    Filed (acceptance time not in the bulk data set), ingested

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

  7. period ended2025-03-31
    13F 1,861 shares
    Change vs previous 13F +4 shares

    0.25% of the 13F portfolio, value $991,131.

    13F-HR 0001812103-25-000003 filed by Rosenberg Matthew Hamilton
    Filed (acceptance time not in the bulk data set), ingested

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

  8. period ended2024-12-31
    13F 1,857 shares
    Change vs previous 13F not available

    0.22% of the 13F portfolio, value $841,741.

    13F-HR 0001812103-25-000001 filed by Rosenberg Matthew Hamilton
    Filed (acceptance time not in the bulk data set), ingested

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