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White Mountains Insurance Group Ltd (WTM) stock analysis

WTMNYSEFire, Marine & Casualty InsuranceFiscal year ends December 31
Financials through Q3 FY2026, quarter ended Sep 30, 2026Last filing: 10-Q on Nov 5, 2026Score 15/3030% below fair value
$2259.75−20.25 (-0.89%)

Close on Nov 11, 2026Market cap $5.39BP/E 6.0Yield 0.04%

StockData Score

Prices as of Nov 11, 2026How the score works

Value5Growth3Performance4Health0Dividend3

Solid15 of 30 checks passed

White Mountains Insurance passes 15 of the 30 checks behind our score; 10 could not be run for lack of data and count as not passed. Each dot in the shape is one check — hover it for the numbers.

Valuation
5/6
Growth
3/6
Past performance
4/6
Financial health
0/6
Dividend
3/6

What stands out

  • Margin of safety over 20%

    The price is 29.5% below fair value, more than the 20% cushion we look for.

  • Trading below fair value

    The share price of $2259.75 is below our fair value estimate of $3206.06.

  • Revenue growing 10%+ a year

    Revenue grew 47.8% a year over the last three fiscal years.

  • EPS growing 10%+ a year

    Diluted EPS grew 15.8% a year over the last three fiscal years.

What to watch

  • Return on equity under 15%

    Return on equity was 19.2% over the last twelve months and averaged 10.9% over five years; we look for 15% on both.

  • P/S above the industry

    White Mountains Insurance's price-to-sales of 1.50 is above the Fire, Marine, and Casualty Insurance median of 1.28.

  • Gross margin slipping

    Gross margin was 92.8% over the last twelve months, against 95.5% a year earlier.

  • Yield below Treasuries

    The 0.0% yield is below the 4.4% on a 1-year Treasury.

Valuation5/6
  • P/E below its 5-year median

    White Mountains Insurance's P/E of 6.0 is below its own 5-year median of 8.0.

  • P/E below the industry

    White Mountains Insurance's P/E of 6.0 is below the Fire, Marine, and Casualty Insurance median of 10.4.

  • P/S above the industry

    White Mountains Insurance's price-to-sales of 1.50 is above the Fire, Marine, and Casualty Insurance median of 1.28.

  • P/B below the industry

    White Mountains Insurance's price-to-book of 1.01 is below the Fire, Marine, and Casualty Insurance median of 1.62.

  • Trading below fair value

    The share price of $2259.75 is below our fair value estimate of $3206.06.

  • Margin of safety over 20%

    The price is 29.5% below fair value, more than the 20% cushion we look for.

Growth3/6
  • Revenue growing 10%+ a year

    Revenue grew 47.8% a year over the last three fiscal years.

  • EPS growing 10%+ a year

    Diluted EPS grew 15.8% a year over the last three fiscal years.

  • Earnings acceleration

    Needs positive net income now, a year ago and five years ago.

  • Growing faster than the industry

    Revenue grew 44.9% over the last twelve months; the Fire, Marine, and Casualty Insurance median is 5.0%.

  • Company guidance

    No outlook found in earnings releases from the last twelve months.

  • Gross margin slipping

    Gross margin was 92.8% over the last twelve months, against 95.5% a year earlier.

Past performance4/6
  • Return on equity under 15%

    Return on equity was 19.2% over the last twelve months and averaged 10.9% over five years; we look for 15% on both.

  • Return on assets over 1%

    Return on assets was 7.5%; for a bank or insurer, 1% or more is considered good.

  • Return on equity above the industry

    White Mountains Insurance's return on equity of 19.2% is above the Fire, Marine, and Casualty Insurance median of 15.9%.

  • Earnings over 5 years

    Needs positive net income five years ago and in the latest year.

  • Net margin above its 5-year average

    Net margin was 26.9% over the last twelve months, against a 5-year average of 17.4%.

  • Net margin above the industry

    White Mountains Insurance's net margin of 26.9% is above the Fire, Marine, and Casualty Insurance median of 12.0%.

Financial health0/6
  • Debt level

    Needs debt and equity figures.

  • Debt trend

    Needs a balance sheet from five years ago with positive equity.

  • Debt coverage

    Needs operating cash flow.

  • Interest coverage

    Interest expense is not reported separately.

  • Short-term liquidity

    Insurers do not split assets into current and non-current.

  • Bankruptcy risk (Altman Z)

    The Altman model does not apply to insurers.

Dividend3/6
  • Pays a dividend

    White Mountains Insurance paid dividends worth 0.0% of the share price over the last twelve months.

  • Yield below Treasuries

    The 0.0% yield is below the 4.4% on a 1-year Treasury.

  • Yield below the top quarter

    The top quarter of US dividend payers yield 3.8% or more; White Mountains Insurance yields 0.0%.

  • Dividend not cut

    The dividend per share has not fallen by more than 10% in any of the last 10 fiscal years.

  • Covered by earnings

    Dividends take 0.2% of net income.

  • Cash-flow cover

    Needs dividends paid and free cash flow.

Scores of similar companies

Our estimate per share

$3,206.06

The share price is 30% below this estimate.

20%+ below
Near fair value
20%+ above
$2,259.75Price$3,206.06Fair value
MethodMultiple usedOwn 5Y medianIndustry medianValue per shareWeight
P/E9.2×8.0×10.4×$3,464.0950%
P/B1.3×1.0×1.6×$2,948.0450%
Fair value$3,206.06100%

Valuation over time

Using the earnings and balance sheet published at each date, not today's.

  • P/E at month end
  • Own 5-year median 8.0
  • Fire, Marine, and Casualty Insurance median 10.4

An estimate from reported numbers and market multiples, not a price target or investment advice. It can be far off for companies whose profits are about to change sharply.

Market risk

From the past year of daily prices.

Liquidity

Low risk

Average value traded per day
$50.44M
Value traded per 1% price move
$59.66M

Downside

Low risk

Typical loss in a bad month
7.8%
Volatility (annualized)
20%
Sharpe ratio, 1 year
0.72
Beta to the S&P 500 (5Y)
0.24

Typical bad-month loss, week by week

25%: high

Margins

Share of revenue, fiscal years 2011 to 2025

Gross margin

95.9%−2.8 pts over 5 years

Net margin

29.6%

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