What is White Mountains Insurance Group's marine & energy — 3?

White Mountains Insurance Group (WTM) reported marine & energy — 3 of 17.3% in Q4 2025.

How has White Mountains Insurance Group's marine & energy — 3 changed year-over-year?

White Mountains Insurance Group's marine & energy — 3 decreased by 11.3% year-over-year, from 19.5% to 17.3%.

What does marine & energy — 3 mean?

Measures the gross written premiums attributed to the Marine and Energy business line before accounting for reinsurance cessions. It serves as a primary indicator of the company's market share and top-line growth within the specialty insurance sector.

White Mountains Insurance Group (WTM) Marine & Energy — 3

Screener

Other product segments

Property and Accident & Health

18.4%+0.5%

Casualty-Runoff

15.3%-1.9%

Specialty

13.2%+21.1%

Casualty-Active

11.4%-1.7%

Similar metrics at other companies

FRHCCivil Liability — 3

11%+5.4pp

FRHCMotor Vehicle — 3

4%-1.0pp

FRHCProperty Damage — 3

30%-2.6pp

FRHCVehicle Owners — 3

2%-0.1pp

FRHCAccident Insurance — 3

2.2%-14.3pp

HIPOCasualty Lines — 3

15%—

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:ShortdurationInsuranceContractsHistoricalClaimsDurationYearThree.

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

Marine & Energy	Marine & Energy / Average Annual Percentage Payout of Incurred Loss and LAE by Age, Net of Reinsurance	Marine & Energy / Average Annual Percentage Payout of Incurred Loss and LAE by Age, Net of Reinsurance	Marine & Energy / Average Annual Percentage Payout of Incurred Loss and LAE by Age, Net of Reinsurance	Marine & Energy / 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
	12.1%	27.1%	17.3%	12.1%	6.4%	6.5%	0.5%	0.4%	0.1%	0.1%

Item 16. Form 10-K Summary.

FAQ

What is White Mountains Insurance Group's marine & energy — 3?: White Mountains Insurance Group (WTM) reported marine & energy — 3 of 17.3% in Q4 2025.
How has White Mountains Insurance Group's marine & energy — 3 changed year-over-year?: White Mountains Insurance Group's marine & energy — 3 decreased by 11.3% year-over-year, from 19.5% to 17.3%.
What does marine & energy — 3 mean?: Measures the gross written premiums attributed to the Marine and Energy business line before accounting for reinsurance cessions. It serves as a primary indicator of the company's market share and top-line growth within the specialty insurance sector.