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Disclosery

STATE OF WISCONSIN INVESTMENT BOARD: BRK-B position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of STATE OF WISCONSIN INVESTMENT BOARD on BRK-B, newest first. How the timeline and the estimate are built.

STATE OF WISCONSIN INVESTMENT BOARD held 747,711 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 747,711 shares
    Change vs previous 13F +4,657 shares

    0.76% of the 13F portfolio, value $374,147,107.

    13F-HR 0001062993-26-004375 filed by STATE OF WISCONSIN INVESTMENT BOARD
    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 743,054 shares
    Change vs previous 13F +22,287 shares

    0.82% of the 13F portfolio, value $356,071,477.

    13F-HR 0001062993-26-002676 filed by STATE OF WISCONSIN INVESTMENT BOARD
    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 720,767 shares
    Change vs previous 13F +5,860 shares

    0.81% of the 13F portfolio, value $362,293,533.

    13F-HR 0001062993-26-000957 filed by STATE OF WISCONSIN INVESTMENT BOARD
    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 714,907 shares
    Change vs previous 13F -4,303 shares

    0.83% of the 13F portfolio, value $359,412,345.

    13F-HR 0001062993-25-016783 filed by STATE OF WISCONSIN INVESTMENT BOARD
    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 719,210 shares
    Change vs previous 13F -31,498 shares

    0.85% of the 13F portfolio, value $349,370,642.

    13F-HR 0001062993-25-014368 filed by STATE OF WISCONSIN INVESTMENT BOARD
    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 750,708 shares
    Change vs previous 13F +14,667 shares

    1.03% of the 13F portfolio, value $399,812,067.

    13F-HR 0001062993-25-009484 filed by STATE OF WISCONSIN INVESTMENT BOARD
    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 736,041 shares
    Change vs previous 13F -36,695 shares

    0.86% of the 13F portfolio, value $333,632,664.

    13F-HR 0001062993-25-002462 filed by STATE OF WISCONSIN INVESTMENT BOARD
    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 772,736 shares
    Change vs previous 13F not available

    0.9% of the 13F portfolio, value $355,659,471.

    13F-HR 0001062993-24-019058 filed by STATE OF WISCONSIN INVESTMENT BOARD
    Filed (acceptance time not in the bulk data set), ingested

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