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Investment Research & Advisory Group, Inc.: BRK-B position timeline

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

Investment Research & Advisory Group, Inc. held 7,614 BRK-B shares at 2026-06-30 per its 13F-HR filed 2026-07-23.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 7,614 shares
    Change vs previous 13F -5 shares

    1.19% of the 13F portfolio, value $3,860,509.

    13F-HR 0001802136-26-000004 filed by Investment Research & Advisory Group, 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 7,619 shares
    Change vs previous 13F +16 shares

    1.3% of the 13F portfolio, value $3,709,487.

    13F-HR 0001802136-26-000003 filed by Investment Research & Advisory Group, 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 7,603 shares
    Change vs previous 13F +44 shares

    1.27% of the 13F portfolio, value $3,837,230.

    13F-HR 0001802136-26-000001 filed by Investment Research & Advisory Group, 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 7,559 shares
    Change vs previous 13F -67 shares

    1.29% of the 13F portfolio, value $3,815,797.

    13F-HR 0001802136-25-000006 filed by Investment Research & Advisory Group, 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 7,626 shares
    Change vs previous 13F +500 shares

    1.38% of the 13F portfolio, value $3,704,482.

    13F-HR 0001802136-25-000004 filed by Investment Research & Advisory Group, 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 7,126 shares
    Change vs previous 13F +84 shares

    1.59% of the 13F portfolio, value $3,795,165.

    13F-HR 0001802136-25-000003 filed by Investment Research & Advisory Group, 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 7,042 shares
    Change vs previous 13F -24 shares

    1.32% of the 13F portfolio, value $3,191,998.

    13F-HR 0001802136-25-000001 filed by Investment Research & Advisory Group, 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 7,066 shares
    Change vs previous 13F not available

    1.37% of the 13F portfolio, value $3,252,197.

    13F-HR 0001802136-24-000005 filed by Investment Research & Advisory Group, Inc.
    Filed (acceptance time not in the bulk data set), ingested

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