White Mountains Insurance Group WTM Change in loss reserves
Change in loss reserves at other companies
Other financials
Where this comes from
Reported directly by White Mountains Insurance Group in its filing.
Tagged under the XBRL concept us-gaap:IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve.
The official record: White Mountains Insurance Group’s 10-Q, filed May 6, 2026, on SEC EDGAR. View the filing →
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Questions, answered.
- What is White Mountains Insurance Group's change in loss reserves?
- White Mountains Insurance Group (WTM) reported change in loss reserves of $103.2M in Q1 2026.
- How has White Mountains Insurance Group's change in loss reserves changed year-over-year?
- White Mountains Insurance Group's change in loss reserves decreased by 22.5% year-over-year, from $133.1M to $103.2M.
- What is the long-term trend for White Mountains Insurance Group's change in loss reserves?
- Over 4 years (2021 to 2025), White Mountains Insurance Group's change in loss reserves has grown at a 16.6% compound annual growth rate (CAGR), from $198.7M to $367.7M.
- What does change in loss reserves mean?
- Reflects the net change in the liability established for estimated future payments on reported and incurred but not reported (IBNR) insurance claims. This metric is a critical indicator of underwriting performance and the adequacy of the company's actuarial loss projections.