What is White Mountains Insurance Group's specialty — 1?

White Mountains Insurance Group (WTM) reported specialty — 1 of 18.2% in Q4 2025.

How has White Mountains Insurance Group's specialty — 1 changed year-over-year?

White Mountains Insurance Group's specialty — 1 decreased by 5.7% year-over-year, from 19.3% to 18.2%.

What does specialty — 1 mean?

This metric serves as a placeholder or specific index identifier for the Specialty segment's primary operational or financial performance indicator. It is used to track core segment-level metrics that are essential for evaluating the segment's contribution to the overall group performance.

White Mountains Insurance Group (WTM) Specialty — 1

Screener

Other product segments

Property and Accident & Health

27.4%+15.1%

Marine & Energy

12.1%-6.2%

Casualty-Runoff

8.8%0.0%

Casualty-Active

3.8%-13.6%

Similar metrics at other companies

HGBermuda - Specialty — 1

9%-1.0pp

HGInternational - Specialty — 1

8%0.0pp

FRHCCivil Liability — 1

34%-4.2pp

FRHCLife Insurance — 1

50.8%+33.9pp

FRHCMotor Vehicle — 1

69%+6.8pp

FRHCProperty Damage — 1

21%+1.4pp

Other financials

Income statement

See full

Revenue$844.6M+22.5%

Gross profit$764.5M+18.2%

Net income$199.5M+62.3%

Balance sheet

See full

Total debt$932.5M+34.2%

Total equity$5.4B+16.0%

Total assets$13.8B+16.4%

Cash flow

See full

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

See full

Gross margin94.1%-3.2pp

Net margin29.3%—

Returns & leverage

See full

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:ShortdurationInsuranceContractsHistoricalClaimsDurationYearOne.

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	Specialty / Average Annual Percentage Payout of Incurred Loss and LAE by Age, Net of Reinsurance	Specialty / Average Annual Percentage Payout of Incurred Loss and LAE by Age, Net of Reinsurance	Specialty / Average Annual Percentage Payout of Incurred Loss and LAE by Age, Net of Reinsurance	Specialty / Average Annual Percentage Payout of Incurred Loss and LAE by Age, Net of Reinsurance	Average Annual Percentage Payout of Incurred Loss and LAE by Age, Net of Reinsurance	Average Annual Percentage Payout of Incurred Loss and LAE by Age, Net of Reinsurance	Average Annual Percentage Payout of Incurred Loss and LAE by Age, Net of Reinsurance	Average Annual Percentage Payout of Incurred Loss and LAE by Age, Net of Reinsurance	Average Annual Percentage Payout of Incurred Loss and LAE by Age, Net of Reinsurance	Average Annual Percentage Payout of Incurred Loss and LAE by Age, Net of Reinsurance
Years	1	2	3	4	5	6	7	8	9	10
	18.2%	26.8%	13.2%	8.7%	6.3%	2.5%	2.1%	1.8%	(1.2)%	1.0%

Item 16. Form 10-K Summary.

FAQ

What is White Mountains Insurance Group's specialty — 1?: White Mountains Insurance Group (WTM) reported specialty — 1 of 18.2% in Q4 2025.
How has White Mountains Insurance Group's specialty — 1 changed year-over-year?: White Mountains Insurance Group's specialty — 1 decreased by 5.7% year-over-year, from 19.3% to 18.2%.
What does specialty — 1 mean?: This metric serves as a placeholder or specific index identifier for the Specialty segment's primary operational or financial performance indicator. It is used to track core segment-level metrics that are essential for evaluating the segment's contribution to the overall group performance.