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White Mountains Insurance Group WTM Bamboo Captive — Amortization of Deferred Acquisition Costs

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Other financials

Income statement

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Revenue$844.6M+22.5%
Gross profit$764.5M+18.2%
Net income$199.5M+62.3%

Balance sheet

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Total debt$932.5M+34.2%
Total equity$5.4B+16.0%
Total assets$13.8B+16.4%

Cash flow

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Operating cash flow-$55.5M-131%

Valuation

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Market cap$5.3B+15.6%
P/E4.7×
P/S1.4×-0.5×

Profitability

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Gross margin94.1%-3.2pp
Net margin29.3%

Returns & leverage

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Return on equity22.4%
Debt / equity0.2×0.0×

Where this comes from

Reported directly by White Mountains Insurance Group in its filing.

Tagged under the XBRL concept us-gaap:SupplementaryInsuranceInformationAmortizationOfDeferredPolicyAcquisitionCosts.

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
Years ended: / December 31, 2025Column A / Millions / Years ended: / December 31, 2025Column B / Deferred Acquisition CostsColumn C / Future Policy Benefits, Losses, Claimsand Loss ExpensesColumn D / Unearned PremiumsColumn E / Other Policy Claims and Benefits PayableColumn F / Premiums EarnedColumn G / Net Investment IncomeColumn H / Benefits,Claims,Losses and Settlement ExpensesColumn I / Amortizationof Deferred Acquisition CostsColumn J / Other Operating ExpensesColumn K / Premiums Written
Ark/WM Outrigger$211.1$2,481.0$1,026.1$1,697.4$106.5$844.2$374.4$143.9$1,811.6
HG Global96.9327.930.827.18.061.4
Bamboo Captive (1)26.71.818.09.716.1
Bamboo CRV2.513.69.622.21.520.08.31.4
December 31, 2024
Ark/WM Outrigger165.22,127.5853.31,587.890.7855.8294.1136.11,679.1
HG Global86.6297.331.732.28.2.256.0
Bamboo Captive10.217.831.539.41.420.614.150.0

Item 16. Form 10-K Summary.

FAQ

What is White Mountains Insurance Group's bamboo captive — amortization of deferred acquisition costs?
White Mountains Insurance Group (WTM) reported bamboo captive — amortization of deferred acquisition costs of $2.43M in Q4 2025.
How has White Mountains Insurance Group's bamboo captive — amortization of deferred acquisition costs changed year-over-year?
White Mountains Insurance Group's bamboo captive — amortization of deferred acquisition costs decreased by 31.2% year-over-year, from $3.53M to $2.43M.
What does bamboo captive — amortization of deferred acquisition costs mean?
The systematic expensing of previously capitalized acquisition costs over the duration of the related insurance policies. This reflects the matching of acquisition expenses with the corresponding earned premium revenue. It is an essential metric for understanding the timing of profitability and the underlying cost structure of the insurance business.

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