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White Mountains Insurance Group WTM Bamboo Captive — Gross Amount
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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:DirectPremiumsEarned.
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 / $ in Millions Premiums Earned / Year ended: / December 31, 2025 | Column B / Gross Amount | Column C / Ceded to Other Companies | Column D / Assumed from Other Companies | Column E / Net Amount | Column F / Percentage of Amount Assumedto Net |
|---|---|---|---|---|---|
| Ark/WM Outrigger | $1,130.9 | $(632.4) | $1,198.9 | $1,697.4 | 70.6% |
| HG Global | — | — | 30.8 | 30.8 | 100.0 |
| Bamboo Captive (1) | — | (2.0) | 28.7 | 26.7 | 107.5 |
| Bamboo CRVs | — | — | 22.2 | 22.2 | 100.0 |
| December 31, 2024 | |||||
| Ark/WM Outrigger | 1,004.2 | (504.6) | 1,088.2 | 1,587.8 | 68.5 |
| HG Global | 15.8 | — | 15.9 | 31.7 | 50.2 |
| Bamboo Captive | — | (4.0) | 43.4 | 39.4 | 110.2 |
Item 16. Form 10-K Summary.
FAQ
- What is White Mountains Insurance Group's bamboo captive — gross amount?
- White Mountains Insurance Group (WTM) reported bamboo captive — gross amount of $0 in Q4 2025.
- What does bamboo captive — gross amount mean?
- Represents the total direct insurance premiums written by the captive segment before any reinsurance cessions. This metric reflects the raw underwriting volume generated by the captive entity prior to risk transfer activities.
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