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Disclosery

S.A. Mason LLC: BRK-B position timeline

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

S.A. Mason LLC held 3,543 BRK-B shares at 2026-09-30 per its 13F-HR filed 2026-10-13.

the latest 13F is the newest step

  1. period ended2026-09-30
    13F 3,543 shares
    Change vs previous 13F -75 shares

    0.52% of the 13F portfolio, value $1,764,237.

    13F-HR 0001800911-26-000004 filed by S.A. Mason LLC
    Accepted , ingested

  2. period ended2026-06-30
    13F 3,618 shares
    Change vs previous 13F +211 shares

    0.56% of the 13F portfolio, value $1,810,411.

    13F-HR 0001800911-26-000003 filed by S.A. Mason LLC
    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 3,407 shares
    Change vs previous 13F +20 shares

    0.61% of the 13F portfolio, value $1,632,634.

    13F-HR 0001800911-26-000002 filed by S.A. Mason LLC
    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 3,387 shares
    Change vs previous 13F -21 shares

    0.67% of the 13F portfolio, value $1,702,476.

    13F-HR 0001800911-26-000001 filed by S.A. Mason LLC
    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 3,408 shares
    Change vs previous 13F 0 shares

    0.76% of the 13F portfolio, value $1,713,338.

    13F-HR 0001800911-25-000005 filed by S.A. Mason LLC
    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 3,408 shares
    Change vs previous 13F -210 shares

    0.8% of the 13F portfolio, value $1,655,504.

    13F-HR 0001800911-25-000003 filed by S.A. Mason LLC
    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 3,618 shares
    Change vs previous 13F +65 shares

    1.02% of the 13F portfolio, value $1,926,874.

    13F-HR 0001800911-25-000002 filed by S.A. Mason LLC
    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 3,553 shares
    Change vs previous 13F not available

    0.85% of the 13F portfolio, value $1,610,504.

    13F-HR 0001800911-25-000001 filed by S.A. Mason LLC
    Filed (acceptance time not in the bulk data set), ingested

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