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Disclosery

East Coast Asset Management, LLC.: BRK-B position timeline

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

East Coast Asset Management, LLC. held 28,980 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 28,980 shares
    Change vs previous 13F -1,183 shares

    4.28% of the 13F portfolio, value $14,501,458.

    13F-HR 0001579254-26-000004 filed by East Coast Asset Management, 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 30,163 shares
    Change vs previous 13F -428 shares

    4.76% of the 13F portfolio, value $14,454,259.

    13F-HR 0001579254-26-000003 filed by East Coast Asset Management, 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 30,591 shares
    Change vs previous 13F -1,104 shares

    4.52% of the 13F portfolio, value $15,376,723.

    13F-HR 0001579254-26-000002 filed by East Coast Asset Management, LLC.
    Filed (acceptance time not in the bulk data set), ingested

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

  4. period ended2025-09-30
    13F 31,695 shares
    Change vs previous 13F -912 shares

    4.99% of the 13F portfolio, value $15,934,501.

    13F-HR 0001579254-25-000004 filed by East Coast Asset Management, LLC.
    Filed (acceptance time not in the bulk data set), ingested

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

  5. period ended2025-06-30
    13F 32,607 shares
    Change vs previous 13F -82 shares

    5.26% of the 13F portfolio, value $15,839,654.

    13F-HR 0001085146-25-005068 filed by East Coast Asset Management, LLC.
    Filed (acceptance time not in the bulk data set), ingested

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

  6. period ended2025-03-31
    13F 32,689 shares
    Change vs previous 13F -578 shares

    6.17% of the 13F portfolio, value $17,409,674.

    13F-HR 0001085146-25-003192 filed by East Coast Asset Management, LLC.
    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 33,267 shares
    Change vs previous 13F -2,900 shares

    5.04% of the 13F portfolio, value $15,079,266.

    13F-HR 0001085146-25-001516 filed by East Coast Asset Management, LLC.
    Filed (acceptance time not in the bulk data set), ingested

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

  8. period ended2024-09-30
    13F 36,167 shares
    Change vs previous 13F not available

    5.53% of the 13F portfolio, value $16,646,223.

    13F-HR 0001085146-24-005781 filed by East Coast Asset Management, LLC.
    Filed (acceptance time not in the bulk data set), ingested

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