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Buy Day today: Poor (44) Weak market breadth · today: Core PCE (August) ≈
WTM

White Mountains Insurance Group, Ltd.

Financial Services · Insurance - Property & Casualty

2,032.00$ -1.1% vs. previous close Closing price · As of: Sep 23, 2026

Statements

Ratios

Valuation ratios (P/E, P/S, EV/EBITDA and the other multiples) are based on the closing price at the end of each period, not on the current price. Margins and returns are shown in percent, multiples without a unit, per-share figures in the reporting currency, net debt in millions.

Tick rows to compare them in a chart (up to 4)

Ratios WTM
Line item 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
Valuation
91.0 22.4 11.7 6.1 4.6 – 1.4 17.4 16.1 20.8 9.3 13.6 – 6.3 33.2 4.5 16.9 11.6 12.3 14.5 10.4 5.8 – 8.5 4.4 – 5.0 7.5 21.4 4.8
2.2 3.0 2.4 1.3 2.2 0.7 0.7 1.3 1.5 1.3 1.3 1.2 0.9 0.7 0.8 1.6 1.4 2.7 2.7 9.7 26.6 9.8 7.8 3.9 3.4 5.0 3.5 1.8 2.1 2.0
1.1 1.3 1.3 1.2 1.8 1.5 1.2 1.6 1.7 1.6 1.4 1.2 0.9 0.8 0.7 0.8 0.9 0.9 0.8 1.0 1.1 1.1 1.1 1.1 0.8 0.8 1.0 0.9 1.1 1.0
3.3 4.9 2.4 1.3 2.3 0.9 0.9 1.5 1.7 1.5 1.6 1.4 1.2 0.8 0.9 1.6 1.6 3.6 3.3 11.4 28.5 9.6 8.0 4.1 4.0 6.1 3.7 2.0 2.2 2.2
8.5 18.6 6.1 3.9 5.9 – 19.8 12.5 13.4 18.5 8.5 9.5 – 4.8 20.3 22.5 10.7 23.8 234.3 37.3 – 110.3 – 8.0 5.3 – – 7.0 14.1 4.2
4.3 – 39.4 – – – – – – – 82.7 17.3 34.2 – 57.1 – – – 33.7 23.4 – 27.5 – – 331.6 21.3 12.2 9.4 8.4 –
23.1% -13.1% 2.5% -28.2% -6.0% -14.3% -9.9% -9.8% -8.4% -5.4% 1.2% 5.8% 2.9% -2.0% 1.8% -3.5% -6.5% -1.1% 3.0% 4.3% -3.2% 3.6% -1.1% -2.6% 0.3% 4.7% 8.2% 10.6% 11.9% -0.1%
Margins
76.4% 66.9% 41.2% 100.0% 54.3% 4.8% 16.2% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 27.5% 33.3% 38.9% 27.0% 96.7% 91.4% 98.6% 90.9% 92.1% 90.8% 5.4% 32.0% 53.1% 45.6% 53.7%
62.2% 80.9% 20.4% 33.4% 42.1% 95.5% 2.8% 12.0% 12.4% 8.0% 18.4% 14.6% -31.8% 16.9% 4.6% 4.5% 10.8% 11.6% -2.1% 29.4% -93.4% 2.1% -48.3% 45.3% 73.7% -44.5% -12.9% 26.1% 13.5% 49.1%
2.4% 13.4% 20.1% 21.4% 47.9% -8.0% 49.1% 7.4% 9.2% 6.3% 14.0% 8.6% -18.8% 10.6% 2.4% 35.3% 8.5% 23.6% 22.1% 67.1% 254.8% 167.8% -38.3% 46.4% 79.1% -44.8% 68.5% 23.5% 9.8% 40.9%
49.8% -39.4% 6.0% -37.0% -13.3% -9.5% -6.9% -12.6% -12.5% -7.0% 1.6% 6.8% 2.7% -1.3% 1.4% -5.5% -9.4% -3.1% 8.1% 41.5% -85.5% 35.6% -8.4% -10.2% 1.0% 23.6% 28.2% 18.7% 24.9% -0.3%
Returns
1.3% 6.0% 11.2% 19.7% 39.0% -17.9% 85.8% 9.4% 10.8% 7.6% 15.1% 8.6% -19.2% 12.9% 2.0% 18.8% 5.6% 7.3% 6.9% 6.8% 10.8% 18.7% -5.2% 13.2% 18.6% -7.4% 20.1% 12.0% 5.1% 20.4%
0.4% 2.0% 3.6% 5.9% 11.5% -1.6% 12.9% 1.8% 2.2% 1.5% 3.5% 2.1% -3.5% 3.0% 0.6% 5.5% 1.6% 2.6% 3.0% 2.9% 6.1% 17.1% -4.2% 10.4% 14.7% -3.9% 10.7% 6.1% 2.3% 9.0%
Balance Sheet & Debt
403 564 29 0.1 92 700 857 848 752 825 1,210 1,020 919 652 472 8.7 333 1,110 863 740 302 -70 88 131 523 652 326 451 318 661
2.9 7.3 0.2 0.0 0.3 – 4.5 1.9 1.3 2.2 1.4 1.5 – 0.9 2.9 0.1 0.9 5.5 42.9 5.5 – -2.2 – 0.3 0.8 – – 0.7 0.9 0.5
34.7% 32.8% 32.5% 30.0% 29.5% 8.8% 15.0% 18.8% 20.4% 19.7% 22.9% 24.7% 18.2% 23.7% 29.3% 29.1% 28.9% 36.2% 43.4% 42.5% 57.1% 91.8% 80.8% 78.9% 79.0% 52.9% 53.3% 50.6% 45.2% 44.1%
0.6 0.9 0.1 0.0 0.1 0.5 0.4 0.3 0.3 0.3 0.3 0.3 0.5 0.3 0.2 0.2 0.2 0.3 0.3 0.2 0.1 0.0 0.1 0.1 0.2 0.2 0.1 0.1 0.1 0.2
Per Share
1.05 5.40 11.94 19.68 69.00 -41.88 228.21 26.44 40.00 26.88 62.32 37.89 -54.53 53.10 10.12 101.33 30.50 51.86 51.13 50.19 80.06 146.06 -42.25 131.96 229.99 -90.52 280.52 201.48 91.00 433.17
44.53 40.31 59.37 91.91 143.91 522.92 464.78 358.71 434.99 429.12 443.78 440.31 290.26 502.55 417.80 286.77 358.19 219.56 231.09 74.81 31.42 87.05 110.43 284.42 290.65 201.94 409.70 857.32 929.82 1,059.95
84.12 90.54 106.85 99.90 176.97 233.65 265.96 280.73 371.06 355.12 412.41 438.42 284.67 413.22 498.49 539.43 548.79 709.08 743.44 742.68 744.63 782.65 813.25 1,001.15 1,239.01 1,217.65 1,392.33 1,677.88 1,770.81 2,124.14
22.16 -15.90 3.56 -34.04 -19.11 -49.87 -31.87 -45.27 -54.49 -29.97 7.01 29.73 7.81 -6.55 5.87 -15.84 -33.54 -6.74 18.72 31.01 -26.88 30.97 -9.30 -29.00 3.02 47.66 115.46 159.89 231.75 -2.82

Data as of: September 23, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)

Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.

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