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Disclosery

WINMILL & CO. INC: BRK-B position timeline

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

WINMILL & CO. INC held 2,500 BRK-B shares at 2026-06-30 per its 13F-HR filed 2026-08-13.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 2,500 shares
    Change vs previous 13F 0 shares

    0.28% of the 13F portfolio, value $1,250,975.

    13F-HR 0000892712-26-000347 filed by WINMILL & CO. 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 2,500 shares
    Change vs previous 13F -500 shares

    0.35% of the 13F portfolio, value $1,198,000.

    13F-HR 0000892712-26-000244 filed by WINMILL & CO. 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 3,000 shares
    Change vs previous 13F -2,100 shares

    0.4% of the 13F portfolio, value $1,507,950.

    13F-HR 0000892712-26-000091 filed by WINMILL & CO. 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 5,100 shares
    Change vs previous 13F 0 shares

    0.62% of the 13F portfolio, value $2,563,974.

    13F-HR 0000892712-25-000148 filed by WINMILL & CO. 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 5,100 shares
    Change vs previous 13F 0 shares

    0.69% of the 13F portfolio, value $2,477,427.

    13F-HR 0000892712-25-000087 filed by WINMILL & CO. 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 5,100 shares
    Change vs previous 13F 0 shares

    0.83% of the 13F portfolio, value $2,716,158.

    13F-HR 0000892712-25-000065 filed by WINMILL & CO. 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 5,100 shares
    Change vs previous 13F 0 shares

    0.75% of the 13F portfolio, value $2,311,728.

    13F-HR 0000892712-25-000034 filed by WINMILL & CO. 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/A 5,100 shares
    Change vs previous 13F not available

    0.79% of the 13F portfolio, value $2,347,326.

    13F-HR/A 0000892712-24-000136 filed by WINMILL & CO. INC
    Filed (acceptance time not in the bulk data set), ingested

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