White Mountains Insurance Group Ltd (WTM)

NYSE · Financial · Insurance - Property & Casualty · USA

White Mountains Insurance Group Ltd is a mid cap company (market value between $2 billion and $10 billion) in the Insurance - Property & Casualty industry.

White Mountains Insurance Group is a Bermuda holding company that makes acquisitions in insurance, financial services and related industries, then operates these businesses through subsidiaries. The company's main operations include property and casualty underwriting via Ark, municipal bond reinsurance through HG Global, capital provision for asset managers via Kudu, and specialty insurance distribution through Distinguished.

From its FY2025 annual report (Form 10-K)

Intrinsic value, DCF valuation, financial health and value investing analysis for the White Mountains Insurance Group Ltd stock.

Our verdict on WTM

Undervalued: intrinsic value $5897.82 per share, market price $2213.61, margin of safety 62.5% (as of 2026-10-20).

Book value at 2.50x, the multiple a 21.9% return on equity justifies, blended with earnings, values the shares at $5,897.82; the price of $2,213.61 is 62% below that value.

Leak Score: 85/100 on 10 of 12 signals (Strong Leak).

ETFs with the most weight in WTM

17 more funds hold it; the full list is part of the paid plan.

More on WTM

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Is WTM undervalued or overvalued?

WTM is undervalued (as of the 2026-10-20 close). Book value at 2.50x, the multiple a 21.9% return on equity justifies, blended with earnings, values the shares at $5,897.82; the price of $2,213.61 is 62% below that value.

What is the intrinsic value of WTM?

$5897.82 per share (as of the 2026-10-20 close), against a market price of $2213.61. That is a margin of safety of 62.5%. The value is the average of the valuation methods that apply to this company, recomputed every night after the US close.

What is White Mountains Insurance Group Ltd's Leak Score?

85 out of 100, which we rate "Strong Leak", on 10 of 12 value investing signals.