WHITE MOUNTAINS INSURANCE GROUP, LTD Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve
WHITE MOUNTAINS INSURANCE GROUP, LTD (WTM) reported Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve of $142.80 million for the 6-month period ending 2026-06-30, per its 10-Q filed 2026-08-06.
Financial Statements › Cash Flow › Operating Activities
us-gaap:IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve · last filed 2026-08-06
- WHITE MOUNTAINS INSURANCE GROUP, LTD increase (decrease) in liability for claims and claims adjustment expense reserve for the quarter ending 2026-06-30 was $39.60M, a 1.80% increase year-over-year.
- WHITE MOUNTAINS INSURANCE GROUP, LTD increase (decrease) in liability for claims and claims adjustment expense reserve for the quarter ending 2026-03-31 was $103.20M, a 22.46% decline year-over-year.
- WHITE MOUNTAINS INSURANCE GROUP, LTD increase (decrease) in liability for claims and claims adjustment expense reserve for the quarter ending 2025-12-31 was $4.00M.
- WHITE MOUNTAINS INSURANCE GROUP, LTD increase (decrease) in liability for claims and claims adjustment expense reserve for the quarter ending 2025-09-30 was $191.70M, a 22.76% decline year-over-year.
- WHITE MOUNTAINS INSURANCE GROUP, LTD increase (decrease) in liability for claims and claims adjustment expense reserve for fiscal 2025 was $367.70M, a 32.28% decline from fiscal 2024.
- WHITE MOUNTAINS INSURANCE GROUP, LTD increase (decrease) in liability for claims and claims adjustment expense reserve for fiscal 2024 was $543.00M, a 75.96% increase from fiscal 2023.
- WHITE MOUNTAINS INSURANCE GROUP, LTD increase (decrease) in liability for claims and claims adjustment expense reserve for fiscal 2023 was $308.60M, a 23.20% decline from fiscal 2022.
- WHITE MOUNTAINS INSURANCE GROUP, LTD increase (decrease) in liability for claims and claims adjustment expense reserve for fiscal 2022 was $401.80M, a 102.21% increase from fiscal 2021.
| Period end | Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve 3 month | Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve 6 month | Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve 6 month as first filed | Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve 9 month | Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve 12 month |
|---|---|---|---|---|---|
| 2026-06-30 | $39.60M derived: 10-Q 6 month − 10-Q 3 month · filed 2026-08-06 | $142.80M 10-Q · filed 2026-08-06 | $146.80M derived: sum of 3 quarters · filed 2026-08-06 | $338.50M derived: sum of 4 quarters · filed 2026-08-06 | |
| 2026-03-31 | $103.20M 10-Q · filed 2026-05-06 | $107.20M derived: sum of 2 quarters · filed 2026-05-06 | $298.90M derived: sum of 3 quarters · filed 2026-05-06 | $337.80M derived: sum of 4 quarters · filed 2026-08-06 | |
| 2025-12-31 | $4.00M derived: 10-K 12 month − 10-Q 9 month · filed 2026-02-27 | $195.70M derived: sum of 2 quarters · filed 2026-02-27 | $234.60M derived: sum of 3 quarters · filed 2026-08-06 | $367.70M 10-K · filed 2026-02-27 | |
| 2025-09-30 | $191.70M derived: 10-Q 9 month − 10-Q 6 month · filed 2025-11-06 | $230.60M derived: sum of 2 quarters · filed 2026-08-06 | $363.70M 10-Q · filed 2025-11-06 | $362.30M derived: sum of 4 quarters · filed 2026-08-06 | |
| 2025-06-30 | $38.90M derived: 10-Q 6 month − 10-Q 3 month · filed 2026-08-06 | $172.00M 10-Q · filed 2026-08-06 | $174.10M 10-Q · filed 2025-08-07 | $170.60M derived: sum of 3 quarters · filed 2026-08-06 | $418.80M derived: sum of 4 quarters · filed 2026-08-06 |
| 2025-03-31 | $133.10M 10-Q · filed 2026-05-06 | $131.70M derived: sum of 2 quarters · filed 2026-05-06 | $379.90M derived: sum of 3 quarters · filed 2026-05-06 | $533.70M derived: sum of 4 quarters · filed 2026-05-06 | |
| 2024-12-31 | -$1.40M derived: 10-K 12 month − 10-Q 9 month · filed 2026-02-27 | $246.80M derived: sum of 2 quarters · filed 2026-02-27 | $400.60M derived: sum of 3 quarters · filed 2026-02-27 | $543.00M 10-K · filed 2026-02-27 | |
| 2024-09-30 | $248.20M derived: 10-Q 9 month − 10-Q 6 month · filed 2025-11-06 | $402.00M derived: sum of 2 quarters · filed 2025-11-06 | $544.40M 10-Q · filed 2025-11-06 | $577.70M derived: sum of 4 quarters · filed 2026-02-27 | |
| 2024-06-30 | $153.80M derived: 10-Q 6 month − 10-Q 3 month · filed 2025-08-07 | $296.20M 10-Q · filed 2025-08-07 | $329.50M derived: sum of 3 quarters · filed 2026-02-27 | $480.30M derived: sum of 4 quarters · filed 2026-02-27 | |
| 2024-03-31 | $142.40M 10-Q · filed 2025-05-07 | $175.70M derived: sum of 2 quarters · filed 2026-02-27 | $326.50M derived: sum of 3 quarters · filed 2026-02-27 | $401.90M derived: sum of 4 quarters · filed 2026-02-27 | |
| 2023-12-31 | $33.30M derived: 10-K 12 month − 10-Q 9 month · filed 2026-02-27 | $184.10M derived: sum of 2 quarters · filed 2026-02-27 | $259.50M derived: sum of 3 quarters · filed 2026-02-27 | $308.60M 10-K · filed 2026-02-27 | |
| 2023-09-30 | $150.80M derived: 10-Q 9 month − 10-Q 6 month · filed 2024-11-06 | $226.20M derived: sum of 2 quarters · filed 2024-11-06 | $275.30M 10-Q · filed 2024-11-06 | $242.40M derived: sum of 4 quarters · filed 2025-02-28 | |
| 2023-06-30 | $75.40M derived: 10-Q 6 month − 10-Q 3 month · filed 2024-08-07 | $124.50M 10-Q · filed 2024-08-07 | $91.60M derived: sum of 3 quarters · filed 2025-02-28 | $398.90M derived: sum of 4 quarters · filed 2025-02-28 | |
| 2023-03-31 | $49.10M 10-Q · filed 2024-05-09 | $16.20M derived: sum of 2 quarters · filed 2025-02-28 | $323.50M derived: sum of 3 quarters · filed 2025-02-28 | $346.00M derived: sum of 4 quarters · filed 2025-02-28 | |
| 2022-12-31 | -$32.90M derived: 10-K 12 month − 10-Q 9 month · filed 2025-02-28 | $274.40M derived: sum of 2 quarters · filed 2025-02-28 | $296.90M derived: sum of 3 quarters · filed 2025-02-28 | $401.80M 10-K · filed 2025-02-28 | |
| 2022-09-30 | $307.30M derived: 10-Q 9 month − 10-Q 6 month · filed 2023-11-06 | $329.80M derived: sum of 2 quarters · filed 2023-11-06 | $434.70M 10-Q · filed 2023-11-06 | $438.50M derived: sum of 4 quarters · filed 2024-02-26 | |
| 2022-06-30 | $22.50M derived: 10-Q 6 month − 10-Q 3 month · filed 2023-08-07 | $127.40M 10-Q · filed 2023-08-07 | $131.20M derived: sum of 3 quarters · filed 2024-02-26 | $262.10M derived: sum of 4 quarters · filed 2024-02-26 | |
| 2022-03-31 | $104.90M 10-Q · filed 2023-05-09 | $108.70M derived: sum of 2 quarters · filed 2024-02-26 | $239.60M derived: sum of 3 quarters · filed 2024-02-26 | $247.60M derived: sum of 4 quarters · filed 2024-02-26 | |
| 2021-12-31 | $3.80M derived: 10-K 12 month − 10-Q 9 month · filed 2024-02-26 | $134.70M derived: sum of 2 quarters · filed 2024-02-26 | $142.70M derived: sum of 3 quarters · filed 2024-02-26 | $198.70M 10-K · filed 2024-02-26 | |
| 2021-09-30 | $130.90M derived: 10-Q 9 month − 10-Q 6 month · filed 2022-11-07 | $138.90M derived: sum of 2 quarters · filed 2022-11-07 | $194.90M 10-Q · filed 2022-11-07 | $194.90M derived: sum of 4 quarters · filed 2023-02-27 | |
| 2021-06-30 | $8.00M derived: 10-Q 6 month − 10-Q 3 month · filed 2022-08-08 | $64.00M 10-Q · filed 2022-08-08 | $64.00M derived: sum of 3 quarters · filed 2023-02-27 | $64.00M derived: sum of 4 quarters · filed 2023-02-27 | |
| 2021-03-31 | $56.00M 10-Q · filed 2022-05-06 | $56.00M derived: sum of 2 quarters · filed 2023-02-27 | $56.00M derived: sum of 3 quarters · filed 2023-02-27 | $56.00M derived: sum of 4 quarters · filed 2023-02-27 | |
| 2020-12-31 | $0.00 derived: 10-K 12 month − 10-Q 9 month · filed 2023-02-27 | $0.00 derived: sum of 2 quarters · filed 2023-02-27 | $0.00 derived: sum of 3 quarters · filed 2023-02-27 | $0.00 10-K · filed 2023-02-27 | |
| 2020-09-30 | $0.00 derived: 10-Q 9 month − 10-Q 6 month · filed 2021-11-08 | $0.00 derived: sum of 2 quarters · filed 2021-11-08 | $0.00 10-Q · filed 2021-11-08 | ||
| 2020-06-30 | $0.00 derived: 10-Q 6 month − 10-Q 3 month · filed 2021-08-06 | $0.00 10-Q · filed 2021-08-06 | |||
| 2020-03-31 | $0.00 10-Q · filed 2021-05-10 | ||||
| 2019-12-31 | $0.00 10-K · filed 2022-02-28 | ||||
| 2017-03-31 | $2.90M 10-Q · filed 2017-05-02 | $5.50M derived: sum of 2 quarters · filed 2017-05-02 | -$8.80M derived: sum of 3 quarters · filed 2017-05-02 | $23.90M derived: sum of 4 quarters · filed 2017-05-02 | |
| 2016-12-31 | $2.60M derived: 10-K 12 month − 10-Q 9 month · filed 2017-02-27 | -$11.70M derived: sum of 2 quarters · filed 2017-02-27 | $21.00M derived: sum of 3 quarters · filed 2017-02-27 | -$25.20M 10-K · filed 2017-02-27 | |
| 2016-09-30 | -$14.30M derived: 10-Q 9 month − 10-Q 6 month · filed 2016-11-02 | $18.40M derived: sum of 2 quarters · filed 2016-11-02 | -$27.80M 10-Q · filed 2016-11-02 | -$65.30M derived: sum of 4 quarters · filed 2017-05-02 | |
| 2016-06-30 | $32.70M derived: 10-Q 6 month − 10-Q 3 month · filed 2016-08-03 | -$13.50M 10-Q · filed 2016-08-03 | -$51.00M derived: sum of 3 quarters · filed 2017-05-02 | $25.30M derived: sum of 4 quarters · filed 2017-05-02 | |
| 2016-03-31 | -$46.20M 10-Q · filed 2017-05-02 | -$83.70M derived: sum of 2 quarters · filed 2017-05-02 | -$7.40M derived: sum of 3 quarters · filed 2017-05-02 | $39.00M derived: sum of 4 quarters · filed 2017-05-02 | |
| 2015-12-31 | -$37.50M derived: 10-K 12 month − 10-Q 9 month · filed 2017-02-27 | $38.80M derived: sum of 2 quarters · filed 2017-02-27 | $85.20M derived: sum of 3 quarters · filed 2017-02-27 | $45.80M 10-K · filed 2017-02-27 | |
| 2015-09-30 | $76.30M derived: 10-Q 9 month − 10-Q 6 month · filed 2016-11-02 | $122.70M derived: sum of 2 quarters · filed 2016-11-02 | $83.30M 10-Q · filed 2016-11-02 | $263.80M derived: sum of 4 quarters · filed 2017-02-27 | |
| 2015-06-30 | $46.40M derived: 10-Q 6 month − 10-Q 3 month · filed 2016-08-03 | $7.00M 10-Q · filed 2016-08-03 | -$79.70M 10-Q · filed 2015-08-03 | $187.50M derived: sum of 3 quarters · filed 2017-02-27 | $328.90M derived: sum of 4 quarters · filed 2017-02-27 |
| 2015-03-31 | -$39.40M 10-Q · filed 2016-05-02 | $141.10M derived: sum of 2 quarters · filed 2017-02-27 | $282.50M derived: sum of 3 quarters · filed 2017-02-27 | ||
| 2014-12-31 | $180.50M derived: 10-K 12 month − 10-Q 9 month · filed 2017-02-27 | $321.90M derived: sum of 2 quarters · filed 2017-02-27 | $282.20M 10-K · filed 2017-02-27 | ||
| 2014-09-30 | $141.40M derived: 10-Q 9 month − 10-Q 6 month · filed 2015-11-02 | $101.70M 10-Q · filed 2015-11-02 | |||
| 2014-06-30 | -$39.70M 10-Q · filed 2015-08-03 | ||||
| 2013-12-31 | $54.30M 10-K · filed 2016-02-29 |
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