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Investment Management Corp of Ontario: BRK-B position timeline

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

Investment Management Corp of Ontario held 137,391 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 137,391 shares
    Change vs previous 13F +4,270 shares

    0.87% of the 13F portfolio, value $68,749,082.

    13F-HR 0001999371-26-018010 filed by Investment Management Corp of Ontario
    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 133,121 shares
    Change vs previous 13F +8,982 shares

    0.82% of the 13F portfolio, value $63,791,583.

    13F-HR 0001999371-26-010874 filed by Investment Management Corp of Ontario
    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 124,139 shares
    Change vs previous 13F +50,192 shares

    0.83% of the 13F portfolio, value $62,398,468.

    13F-HR 0001999371-26-003507 filed by Investment Management Corp of Ontario
    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 73,947 shares
    Change vs previous 13F +28,115 shares

    0.56% of the 13F portfolio, value $37,176,115.

    13F-HR 0001999371-25-017736 filed by Investment Management Corp of Ontario
    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 45,832 shares
    Change vs previous 13F -2,057 shares

    0.32% of the 13F portfolio, value $22,263,811.

    13F-HR 0001999371-25-011301 filed by Investment Management Corp of Ontario
    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 47,889 shares
    Change vs previous 13F -17,324 shares

    0.52% of the 13F portfolio, value $25,504,724.

    13F-HR 0001999371-25-006258 filed by Investment Management Corp of Ontario
    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 65,213 shares
    Change vs previous 13F +18,432 shares

    0.98% of the 13F portfolio, value $29,559,749.

    13F-HR 0001839882-25-009247 filed by Investment Management Corp of Ontario
    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 46,781 shares
    Change vs previous 13F not available

    0.48% of the 13F portfolio, value $21,531,423.

    13F-HR 0001839882-24-039251 filed by Investment Management Corp of Ontario
    Filed (acceptance time not in the bulk data set), ingested

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