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Disclosery

Aquamarine Zurich AG: BRK-A position timeline

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

Aquamarine Zurich AG held 30 BRK-A shares at 2026-06-30 per its 13F-HR filed 2026-07-10.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 30 shares
    Change vs previous 13F 0 shares

    15.59% of the 13F portfolio, value $22,466,000.

    13F-HR 0001953324-26-000003 filed by Aquamarine Zurich AG
    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 shares
    Change vs previous 13F 0 shares

    15.92% of the 13F portfolio, value $21,544,000.

    13F-HR 0001953324-26-000002 filed by Aquamarine Zurich AG
    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 shares
    Change vs previous 13F 0 shares

    15.35% of the 13F portfolio, value $22,644,000.

    13F-HR 0001953324-26-000001 filed by Aquamarine Zurich AG
    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 30 shares
    Change vs previous 13F 0 shares

    7.13% of the 13F portfolio, value $22,626,000.

    13F-HR 0001953324-25-000007 filed by Aquamarine Zurich AG
    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/A 30 shares
    Change vs previous 13F 0 shares

    7.06% of the 13F portfolio, value $21,864,000.

    13F-HR/A 0001953324-25-000006 filed by Aquamarine Zurich AG
    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/A 30 shares
    Change vs previous 13F 0 shares

    8.16% of the 13F portfolio, value $23,953,000.

    13F-HR/A 0001953324-25-000005 filed by Aquamarine Zurich AG
    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 30 shares
    Change vs previous 13F 0 shares

    7.1% of the 13F portfolio, value $20,428,000.

    13F-HR 0001953324-25-000001 filed by Aquamarine Zurich AG
    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 30 shares
    Change vs previous 13F not available

    7.26% of the 13F portfolio, value $20,735,000.

    13F-HR 0001953324-24-000005 filed by Aquamarine Zurich AG
    Filed (acceptance time not in the bulk data set), ingested

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