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White Mountains Insurance Group WTM Specialty — Cumulative number of reported claims
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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:ShortdurationInsuranceContractsNumberOfReportedClaims.
The source filing: White Mountains Insurance Group’s 10-K, filed February 27, 2026.
- Filed
- Feb 27, 2026, 9:21 AM EST
- Fiscal year
- FY2025
- Accession
- 0001628280-26-012603
| Specialty / $ in Millions / Accident Year | Specialty / $ in Millions / Incurred Loss and LAE, Net of Reinsurance / For the Years Ended December 31, 2016 | Specialty / $ in Millions / Incurred Loss and LAE, Net of Reinsurance / For the Years Ended December 31, 2017 | Specialty / Incurred Loss and LAE, Net of Reinsurance / For the Years Ended December 31, 2018 | Incurred Loss and LAE, Net of Reinsurance / For the Years Ended December 31, 2019 | Incurred Loss and LAE, Net of Reinsurance / For the Years Ended December 31, 2020 | Incurred Loss and LAE, Net of Reinsurance / For the Years Ended December 31, 2021 | Incurred Loss and LAE, Net of Reinsurance / For the Years Ended December 31, 2022 | Incurred Loss and LAE, Net of Reinsurance / For the Years Ended December 31, 2023 | Incurred Loss and LAE, Net of Reinsurance / For the Years Ended December 31, 2024 | Incurred Loss and LAE, Net of Reinsurance / For the Years Ended December 31, 2025 | As of December 31, 2025 / Total IBNR plus expected development on reported claims | As of December 31, 2025 / Cumulative number of reported claims |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2016 | $18.5 | $14.5 | $11.1 | $11.4 | $12.0 | $12.0 | $9.1 | $8.6 | $12.5 | $12.2 | $.2 | 1,936 |
| 2017 | 18.3 | 13.2 | 12.3 | 11.8 | 11.9 | 10.9 | 10.6 | 11.2 | 11.1 | — | 2,201 | |
| 2018 | 14.7 | 16.6 | 17.0 | 16.2 | 15.1 | 15.9 | 16.9 | 17.5 | .9 | 2,129 | ||
| 2019 | 22.1 | 19.8 | 18.9 | 25.9 | 30.1 | 20.0 | 26.8 | .7 | 2,396 | |||
| 2020 | 24.5 | 23.5 | 19.3 | 20.4 | 17.3 | 17.7 | 1.3 | 2,028 | ||||
| 2021 | 71.8 | 63.0 | 51.8 | 44.0 | 41.7 | 6.6 | 1,735 | |||||
| 2022 | 181.9 | 178.5 | 172.6 | 179.6 | 58.3 | 1,577 | ||||||
| 2023 | 216.6 | 199.4 | 153.4 | 41.3 | 1,734 |
Item 16. Form 10-K Summary.
FAQ
- What is White Mountains Insurance Group's specialty — cumulative number of reported claims?
- White Mountains Insurance Group (WTM) reported specialty — cumulative number of reported claims of 239,600% in Q4 2025.
- How has White Mountains Insurance Group's specialty — cumulative number of reported claims changed year-over-year?
- White Mountains Insurance Group's specialty — cumulative number of reported claims increased by 0.4% year-over-year, from 238,700% to 239,600%.
- What does specialty — cumulative number of reported claims mean?
- This metric tracks the total volume of insurance claims reported to the Specialty segment since the inception of the relevant underwriting period. It provides insight into the frequency of claims activity and the operational scale of the segment's insurance portfolio.
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