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

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

MKLMarine and energy — Earned premiums

$213.35M+4.7%

HIGMarine — Earned premiums and fee income

$72M+4.3%

RLIMarine — Premiums Earned Net

$39.22M+4.0%

AXSMarine and aviation — Net premiums earned

$180.74M+6.4%

ACGLMarine and aviation — Net premiums earned

$79.25M+14.9%

KNSLOcean Marine — Gross written premiums

$940.25K+2.9%

Other financials

Income statement

See full

Revenue$517.8M-10.4%

Gross profit$475.1M-16.7%

Net income-$27.2M-180%

Balance sheet

See full

Total debt$834.8M+23.5%

Total equity$5.4B+19.2%

Total assets$13.2B+19.7%

Cash flow

See full

Operating cash flow$30.5M+176%

Valuation

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Market cap$4.99B+9.8%

Profitability

See full

Gross margin94.9%-3.7pp

Net margin28.4%—

Returns & leverage

See full

Return on equity21.2%—

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 official record: White Mountains Insurance Group’s 10-K, filed February 27, 2026, on SEC EDGAR. View the filing →

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Questions, answered.

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.