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Kemnay Advisory Services Inc.: BRK-B position timeline

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

Kemnay Advisory Services Inc. held 55,690 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 55,690 shares
    Change vs previous 13F +18,823 shares

    3.52% of the 13F portfolio, value $27,866,719.

    13F-HR 0001193125-26-350683 filed by Kemnay Advisory Services Inc.
    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 36,867 shares
    Change vs previous 13F +829 shares

    2.84% of the 13F portfolio, value $17,666,667.

    13F-HR 0001193125-26-225479 filed by Kemnay Advisory Services Inc.
    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 36,038 shares
    Change vs previous 13F +392 shares

    2.73% of the 13F portfolio, value $18,114,501.

    13F-HR 0001193125-26-053269 filed by Kemnay Advisory Services Inc.
    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 35,646 shares
    Change vs previous 13F +6,125 shares

    2.73% of the 13F portfolio, value $17,920,670.

    13F-HR 0001193125-25-278728 filed by Kemnay Advisory Services Inc.
    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 29,521 shares
    Change vs previous 13F -2,538 shares

    2.28% of the 13F portfolio, value $14,340,416.

    13F-HR 0000950123-25-008090 filed by Kemnay Advisory Services Inc.
    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 32,059 shares
    Change vs previous 13F +8,062 shares

    3.21% of the 13F portfolio, value $17,073,982.

    13F-HR 0000950123-25-005522 filed by Kemnay Advisory Services Inc.
    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 23,997 shares
    Change vs previous 13F -5,241 shares

    1.95% of the 13F portfolio, value $10,877,360.

    13F-HR 0000950123-25-002359 filed by Kemnay Advisory Services Inc.
    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 29,238 shares
    Change vs previous 13F not available

    2.44% of the 13F portfolio, value $13,457,082.

    13F-HR 0000950123-24-011526 filed by Kemnay Advisory Services Inc.
    Filed (acceptance time not in the bulk data set), ingested

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