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Disclosery

WHITE MOUNTAINS INSURANCE GROUP LTD: SPY position timeline

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

WHITE MOUNTAINS INSURANCE GROUP LTD held 226,500 SPY 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 226,500 shares
    Change vs previous 13F 0 shares

    42.97% of the 13F portfolio, value $169,143,405.

    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 226,500 shares
    Change vs previous 13F +181,500 shares

    47.01% of the 13F portfolio, value $147,302,010.

    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 45,000 shares
    Change vs previous 13F +45,000 shares

    11.72% of the 13F portfolio, value $30,686,400.

    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 ended2025-06-30
    13F 0 shares
    Change vs previous 13F -216,197 shares

    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).

    Exited: the 13F for this period no longer lists the position.

  5. period ended2025-03-31
    13F 216,197 shares
    Change vs previous 13F -166,949 shares

    42.3% of the 13F portfolio, value $120,938,440.

    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).

  6. period ended2024-12-31
    13F 383,146 shares
    Change vs previous 13F 0 shares

    52.69% of the 13F portfolio, value $224,554,208.

    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).

  7. period ended2024-09-30
    13F 383,146 shares
    Change vs previous 13F not available

    40.47% of the 13F portfolio, value $219,833,849.

    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).