White Mountains Insurance Group, Ltd. (WTM) Stock

About White Mountains Insurance Group, Ltd.

White Mountains Insurance Group, Ltd. (WTM) stock trades at $2225.24 with a market capitalization of $5.31B. The stock is valued at a price-to-earnings (P/E) ratio of 4.60, price-to-book of 0.90, price-to-sales of 1.79. Over the past 52 weeks the stock has ranged between $1784.78 and $2333.00, and currently trades 4.6% below its 52-week high. It pays a dividend yielding 0.05%.

On profitability, White Mountains Insurance Group, Ltd. generates a return on equity (ROE) of 21.34%, above the typical market range of roughly 12-15%, return on capital employed of 9.52%, an operating margin of 49.09%, a net profit margin of 39.92%.

White Mountains Insurance Group, Ltd. by the numbers, 2016–2025

Between 2016 and 2025 White Mountains Insurance Group, Ltd. reported revenue of $158.0M rising to $2.7B, a change of +1613.3% across 10 years. Compounded, revenue has grown 24.8% a year over five years, 32.7% over three, 15.0% over the last twelve months. Net profit rose to $1.1B.

Operating margin went from -93.4% in 2016 to 49.1% in 2025, a gain of 142.5 percentage points. The most recent net margin is 39.92%. On a trailing twelve-month basis to Jun '26, revenue is $2.8B and net profit $1.1B.

Borrowings rose from $13.0M to $837.0M, cash from operations was $-7.0M in the latest year, positive in 5 of the last 10.

Return on equity has averaged 10.2% over five years, and was 20.4% in the most recent year.

The share price itself has compounded at —% a year over five years, —% over three, —% over the last year. Past price movement is history, not a forecast.

Figures are as reported and in the company's own reporting currency. They describe what has already happened and carry no implication about what follows.

White Mountains Insurance Group, Ltd. (WTM) — frequently asked questions