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Disclosery

Alpha Zero LLC: BRK-B position timeline

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

Alpha Zero LLC held 1,126 BRK-B shares at 2026-06-30 per its 13F-HR filed 2026-07-20.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 1,126 shares
    Change vs previous 13F +181 shares

    0.21% of the 13F portfolio, value $555,253.

    13F-HR 0002085853-26-000770 filed by Alpha Zero 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 945 shares
    Change vs previous 13F +58 shares

    0.23% of the 13F portfolio, value $452,844.

    13F-HR 0002085853-26-000574 filed by Alpha Zero 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 887 shares
    Change vs previous 13F -18 shares

    0.24% of the 13F portfolio, value $445,851.

    13F-HR 0002085853-26-000569 filed by Alpha Zero 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 905 shares
    Change vs previous 13F -72 shares

    0.26% of the 13F portfolio, value $454,980.

    13F-HR 0002085853-25-000251 filed by Alpha Zero 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 977 shares
    Change vs previous 13F +145 shares

    0.31% of the 13F portfolio, value $474,597.

    13F-HR 0002085853-25-000268 filed by Alpha Zero 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 832 shares
    Change vs previous 13F -60 shares

    0.34% of the 13F portfolio, value $443,107.

    13F-HR 0002085853-25-000266 filed by Alpha Zero 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 892 shares
    Change vs previous 13F not available

    0.31% of the 13F portfolio, value $404,326.

    13F-HR 0002085853-25-000265 filed by Alpha Zero LLC
    Filed (acceptance time not in the bulk data set), ingested

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