What is White Mountains Insurance Group's marine & energy — 9?

White Mountains Insurance Group (WTM) reported marine & energy — 9 of 0.1% in Q4 2025.

How has White Mountains Insurance Group's marine & energy — 9 changed year-over-year?

White Mountains Insurance Group's marine & energy — 9 decreased by 66.7% year-over-year, from 0.3% to 0.1%.

What does marine & energy — 9 mean?

Tracks the frequency or severity of claims development for the Marine and Energy segment over a defined historical period. This metric assists investors in understanding the volatility and long-term accuracy of the segment's actuarial reserving practices.

White Mountains Insurance Group WTM Marine & Energy — 9

Other product segments

Casualty-Active

4.2%+13.5%

Casualty-Runoff

3.2%+3.2%

Specialty

1.2%-7.7%

Property and Accident & Health

0.2%+100%

Similar metrics at other companies

MKLMarine and energy — Earned premiums

$213.35M+4.7%

MKLMarine and energy — Incurred losses and loss adjustment expenses, prior accident years

-$42.6M-191%

HIGMarine — 9th Year

-1.6%+0.1pp

HIGMarine — Claims Reported

1,625,200%+1,700pp

ACGLProperty, energy, marine and aviation — Year Nine

-0.1%0.0pp

HIGMarine — Prior accident year development [1]

$4M—

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

See full

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:ShortdurationInsuranceContractsHistoricalClaimsDurationYearNine.

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

Ask your AI about White Mountains Insurance Group's marine & energy — 9.

Connect your AI assistant and compare segments, right in your chat.

Connect your AI

Claude

Questions, answered.

What is White Mountains Insurance Group's marine & energy — 9?: White Mountains Insurance Group (WTM) reported marine & energy — 9 of 0.1% in Q4 2025.
How has White Mountains Insurance Group's marine & energy — 9 changed year-over-year?: White Mountains Insurance Group's marine & energy — 9 decreased by 66.7% year-over-year, from 0.3% to 0.1%.
What does marine & energy — 9 mean?: Tracks the frequency or severity of claims development for the Marine and Energy segment over a defined historical period. This metric assists investors in understanding the volatility and long-term accuracy of the segment's actuarial reserving practices.