WHITE MOUNTAINS INSURANCE GROUP LTD
For the period ended Dec 31, 2025. Filed Feb 27, 2026.
View on SEC.govAbout this filing
A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.
FY2025 · Filed Feb 27, 2026
WTM$2,280.00+1.1%Stored close · as of Nov 10, 2026
Extracted filing text, with the paragraph anchors used by the comparison.
See the whole filing, with its images and exhibitsContents
Supplemental information concerning property and casualty insurance operations
SCHEDULE VI
SUPPLEMENTAL INFORMATION CONCERNING PROPERTY AND CASUALTY INSURANCE OPERATIONS
(Millions)
| Column A · Column B · Column C · Column D · Column E · Column F · Column G · Column H · Column I · Column J · Column K | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Deferred acquisitioncosts · Reservesfor UnpaidClaims andClaims AdjustmentExpenses · Discount, if any, deducted inColumn C · UnearnedPremiums · EarnedPremiums · Net investmentincome · Claims and ClaimsAdjustment ExpensesIncurred Related to · Amortizationof deferredpolicy acquisitioncosts · PaidClaims andClaims AdjustmentExpenses · Net Premiumswritten | |||||||||||
| Affiliation withregistrant · CurrentYear · PriorYear | |||||||||||
| Ark/WM Outrigger | |||||||||||
| 2025 | $211.1 | $2,481.0 | $— | $1,026.1 | $1,697.4 | $106.5 | $956.9 | $(112.7) | $374.4 | $585.7 | $1,811.6 |
| 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 |
| 2024 | 5.8 | 12.1 | — | 29.0 | 32.7 | .4 | 12.1 | — | 12.1 | — | 61.7 |
| 2023 | — | — | — | — | — | — | — | — | — | — | — |
FS - 8
The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.