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Disclosery

J.M. Arbour, LLC: BRK-B position timeline

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

J.M. Arbour, LLC held 1,046 BRK-B shares at 2026-06-30 per its 13F-HR filed 2026-08-14.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 1,046 shares
    Change vs previous 13F -1,613 shares

    0.45% of the 13F portfolio, value $523,408.

    13F-HR 0001951757-26-001270 filed by J.M. Arbour, LLC
    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 2,659 shares
    Change vs previous 13F +41 shares

    1.22% of the 13F portfolio, value $1,274,193.

    13F-HR 0002099154-26-000002 filed by J.M. Arbour, LLC
    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 2,618 shares
    Change vs previous 13F not available

    1.31% of the 13F portfolio, value $1,315,938.

    13F-HR 0002099154-26-000001 filed by J.M. Arbour, LLC
    Filed (acceptance time not in the bulk data set), ingested

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