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Sippican Capital Advisors: BRK-B position timeline

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

Sippican Capital Advisors held 4,410 BRK-B shares at 2026-06-30 per its 13F-HR filed 2026-07-22.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 4,410 shares
    Change vs previous 13F -20 shares

    1.35% of the 13F portfolio, value $2,206,720.

    13F-HR 0001398344-26-012476 filed by Sippican Capital Advisors
    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 4,430 shares
    Change vs previous 13F 0 shares

    1.45% of the 13F portfolio, value $2,122,856.

    13F-HR 0001398344-26-007005 filed by Sippican Capital Advisors
    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 4,430 shares
    Change vs previous 13F -646 shares

    1.43% of the 13F portfolio, value $2,226,739.

    13F-HR 0001398344-26-001091 filed by Sippican Capital Advisors
    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 5,076 shares
    Change vs previous 13F 0 shares

    1.69% of the 13F portfolio, value $2,551,908.

    13F-HR 0001398344-25-019813 filed by Sippican Capital Advisors
    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 5,076 shares
    Change vs previous 13F 0 shares

    1.79% of the 13F portfolio, value $2,465,769.

    13F-HR 0001398344-25-013756 filed by Sippican Capital Advisors
    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 5,076 shares
    Change vs previous 13F -5 shares

    2.04% of the 13F portfolio, value $2,703,376.

    13F-HR 0001398344-25-007863 filed by Sippican Capital Advisors
    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 5,081 shares
    Change vs previous 13F +7 shares

    1.68% of the 13F portfolio, value $2,303,116.

    13F-HR 0001398344-25-000969 filed by Sippican Capital Advisors
    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 5,074 shares
    Change vs previous 13F not available

    1.63% of the 13F portfolio, value $2,335,359.

    13F-HR 0001398344-24-019481 filed by Sippican Capital Advisors
    Filed (acceptance time not in the bulk data set), ingested

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