White Mountains Insurance Group WTM Property and Accident & Health — 4
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Where this comes from
Reported directly by White Mountains Insurance Group in its filing.
Tagged under the XBRL concept us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearFour.
The official record: White Mountains Insurance Group’s 10-K, filed February 27, 2026, on SEC EDGAR. View the filing →
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Questions, answered.
- What is White Mountains Insurance Group's property and accident & health — 4?
- White Mountains Insurance Group (WTM) reported property and accident & health — 4 of 6.4% in Q4 2025.
- How has White Mountains Insurance Group's property and accident & health — 4 changed year-over-year?
- White Mountains Insurance Group's property and accident & health — 4 decreased by 0.0% year-over-year, from 6.4% to 6.4%.
- What does property and accident & health — 4 mean?
- This metric tracks the net impact of prior year loss reserve development within the Property and Accident & Health insurance portfolio. It highlights the financial consequences of re-evaluating claims that occurred in previous fiscal years. A consistent trend in this metric provides insight into the long-term underwriting discipline of the segment.