White Mountains Insurance Group WTM Property and Accident & Health — 5
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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:ShortdurationInsuranceContractsHistoricalClaimsDurationYearFive.
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 — 5?
- White Mountains Insurance Group (WTM) reported property and accident & health — 5 of 2.9% in Q4 2025.
- How has White Mountains Insurance Group's property and accident & health — 5 changed year-over-year?
- White Mountains Insurance Group's property and accident & health — 5 increased by 3.6% year-over-year, from 2.8% to 2.9%.
- What does property and accident & health — 5 mean?
- This metric quantifies the change in estimated ultimate losses for prior accident years within the Property and Accident & Health segment. It is a critical component of the segment's overall profitability, reflecting whether past claims were over- or under-reserved. This helps stakeholders understand the impact of historical underwriting decisions on current financial results.