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WHITE MOUNTAINS INSURANCE GROUP LTD: MAX position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of WHITE MOUNTAINS INSURANCE GROUP LTD on MAX, newest first. How the timeline and the estimate are built.

WHITE MOUNTAINS INSURANCE GROUP LTD held 17,856,614 MAX shares at 2026-06-30 per its 13F-HR filed 2026-08-12.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 17,856,614 shares
    Change vs previous 13F 0 shares

    57.03% of the 13F portfolio, value $224,457,638.

    13F-HR 0001104659-26-094905 filed by WHITE MOUNTAINS INSURANCE GROUP LTD
    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 17,856,614 shares
    Change vs previous 13F 0 shares

    52.99% of the 13F portfolio, value $166,066,510.

    13F-HR 0001104659-26-059351 filed by WHITE MOUNTAINS INSURANCE GROUP LTD
    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 17,856,614 shares
    Change vs previous 13F 0 shares

    88.28% of the 13F portfolio, value $231,243,151.

    13F-HR 0001104659-26-014432 filed by WHITE MOUNTAINS INSURANCE GROUP LTD
    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 17,856,614 shares
    Change vs previous 13F 0 shares

    100% of the 13F portfolio, value $203,208,267.

    13F-HR 0001104659-25-110906 filed by WHITE MOUNTAINS INSURANCE GROUP LTD
    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 17,856,614 shares
    Change vs previous 13F 0 shares

    100% of the 13F portfolio, value $195,529,923.

    13F-HR 0001104659-25-076169 filed by WHITE MOUNTAINS INSURANCE GROUP LTD
    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 17,856,614 shares
    Change vs previous 13F 0 shares

    57.7% of the 13F portfolio, value $164,995,113.

    13F-HR 0001104659-25-047309 filed by WHITE MOUNTAINS INSURANCE GROUP LTD
    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 17,856,614 shares
    Change vs previous 13F 0 shares

    47.31% of the 13F portfolio, value $201,601,172.

    13F-HR 0001104659-25-012202 filed by WHITE MOUNTAINS INSURANCE GROUP LTD
    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 17,856,614 shares
    Change vs previous 13F not available

    59.53% of the 13F portfolio, value $323,383,280.

    13F-HR 0001104659-24-116806 filed by WHITE MOUNTAINS INSURANCE GROUP LTD
    Filed (acceptance time not in the bulk data set), ingested

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