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White Mountains Insurance Group WTM Bamboo Captive — Unearned Premiums
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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:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersUnearnedPremiums.
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
| Column A / Affiliation withregistrant | Column B / Deferred acquisitioncosts | Column C / Reservesfor Unpaid Claims and Claims Adjustment Expenses | Column D / Discount, if any, deducted in Column C | Column E / Unearned Premiums | Column F / Earned Premiums | Column G / Net investmentincome | Column H / Claims and Claims Adjustment Expenses Incurred Related to / Current Year | Column H / Claims and Claims Adjustment Expenses Incurred Related to / Prior Year | Column I / Amortizationof deferredpolicy acquisitioncosts | Column J / Paid Claims and Claims Adjustment Expenses | Column K / Net Premiumswritten |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | 165.2 | 2,127.5 | — | 853.3 | 1,587.8 | 90.7 | 914.4 | (58.6) | 294.1 | 416.7 | 1,679.1 |
| 2023 | 145.3 | 1,605.1 | — | 743.6 | 1,409.7 | 61.4 | 706.9 | 19.9 | 273.1 | 407.9 | 1,520.9 |
| Bamboo Captive (1) | |||||||||||
| 2025 | — | — | — | — | $26.7 | $1.8 | $16.0 | $2.0 | $9.7 | $27.2 | $16.1 |
| 2024 | 10.2 | 17.8 | — | 31.5 | 39.4 | 1.4 | 17.3 | 3.3 | 14.1 | 12.0 | 50.0 |
| 2023 | — | — | — | — | — | — | — | — | — | — | — |
| Bamboo CRVs | |||||||||||
| 2025 | $2.5 | $13.6 | — | $9.6 | $22.2 | $1.5 | $16.2 | $3.8 | $8.3 | $16.4 | $1.4 |
Item 16. Form 10-K Summary.
FAQ
- What is White Mountains Insurance Group's bamboo captive — unearned premiums?
- White Mountains Insurance Group (WTM) reported bamboo captive — unearned premiums of $0 in Q4 2025.
- What does bamboo captive — unearned premiums mean?
- Represents the portion of premiums written that has not yet been earned by the insurer because the policy coverage period is still active. This liability reflects the company's obligation to provide future insurance coverage for the remainder of the policy term. It serves as a leading indicator of future revenue recognition and potential underwriting volume.
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