WTM News

Official issuer or fund updates, exact SEC current reports, and large established publisher coverage, newest first. Every lawfully retained item remains in the corpus; each public page contains at most 100 rows. Headlines open the exact source; summaries are concise descriptions and not investment recommendations. Captured 2026-08-31.

Date	Type	Publisher	Headline	Summary
2026-08-27	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 5.02,9.01.
2026-08-06	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2026-06-05	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 7.01,9.01.
2026-05-21	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 5.02,5.07,9.01.
2026-05-15	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 1.01,2.03,9.01.
2026-05-06	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2026-04-01	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 8.01,9.01.
2026-02-26	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 8.01,9.01.
2026-02-06	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2026-01-07	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 8.01.
2025-12-08	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.01,8.01,9.01.
2025-11-06	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2025-10-03	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 1.01,9.01.
2025-09-03	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 8.01.
2025-09-02	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 5.02,9.01.
2025-08-07	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2025-07-18	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 8.01,9.01.
2025-07-16	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 8.01,9.01.
2025-07-07	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 1.01,9.01.
2025-06-06	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 7.01,9.01.
2025-05-22	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 5.07.
2025-05-07	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2025-04-10	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 8.01,9.01.
2025-02-07	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2025-01-08	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 8.01.
2024-11-06	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2024-08-07	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2024-06-07	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 7.01,9.01.
2024-05-23	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 5.07.
2024-05-09	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2024-04-10	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 5.02,9.01.
2024-02-23	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 5.02,9.01.
2024-02-07	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2024-01-03	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 8.01.
2023-12-21	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 8.01,9.01.
2023-11-06	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2023-10-20	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 1.01,9.01.
2023-08-07	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2023-06-06	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 7.01,9.01.
2023-05-25	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 5.02,9.01.
2023-05-25	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 5.07.
2023-05-09	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2023-02-23	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 5.02,9.01.
2023-02-07	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2022-12-21	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 8.01.
2022-11-07	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2022-08-08	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2022-08-05	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.01,8.01,9.01.
2022-06-10	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 7.01,9.01.
2022-05-26	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 8.01,9.01.
2022-05-26	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 5.07.
2022-05-10	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 1.01,9.01.
2022-05-06	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2022-04-01	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 8.01,9.01.
2022-02-08	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2021-12-02	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 5.02,9.01.
2021-11-08	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2021-10-12	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 5.02,9.01.
2021-09-13	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 8.01.
2021-08-13	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 7.01.
2021-08-06	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2021-07-19	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 7.01.
2021-06-29	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 8.01.
2021-06-04	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 7.01,9.01.
2021-05-28	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 5.02,5.07.
2021-05-10	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2021-03-16	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K/A	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K/A covering items 2.01,9.01.
2021-02-05	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2021-01-04	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.01.
2020-12-21	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 8.01.
2020-12-21	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K/A	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K/A covering items 5.02.
2020-12-15	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 1.01,9.01.
2020-12-10	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 5.02.
2020-12-01	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 5.02.
2020-11-06	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2020-10-01	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 1.01,9.01.
2020-08-07	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2020-05-22	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 5.02,5.07.
2020-05-08	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2020-04-09	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 7.01,9.01.
2020-03-23	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 8.01.
2020-02-05	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2019-11-06	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2019-08-30	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 5.02.
2019-08-06	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2019-06-28	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 8.01.
2019-06-07	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 7.01,9.01.
2019-05-24	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 5.07.
2019-05-06	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2019-04-04	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 8.01.
2019-03-01	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 5.02,9.01.
2019-02-26	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 8.01.
2019-02-14	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 8.01.
2019-02-06	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2019-02-04	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 8.01,9.01.
2019-01-07	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 5.02,8.01,9.01.
2018-11-05	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2018-08-24	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 5.02,9.01.
2018-08-07	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 2.02,9.01.
2018-06-08	Current report	SEC filing	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K	WHITE MOUNTAINS INSURANCE GROUP LTD filed Form 8-K covering items 7.01,9.01.