White Mountains Insurance Group, Ltd. (WTM)
NYSE: WTM · Real-Time Price · USD
1,913.20
+65.53 (3.55%)
At close: Oct 17, 2025, 4:00 PM EDT
1,913.54
+0.34 (0.02%)
After-hours: Oct 17, 2025, 7:00 PM EDT

WTM Market Cap

WTM has a market cap or net worth of $4.86 billion as of October 17, 2025. Its market cap has increased by 7.91% in one year.

Market Cap
4.86B
Enterprise Value
5.32B
1-Year Change
7.91%
Ranking
Category
Stock Price
$1,913.20

Market Cap Chart

Since December 1, 1998, WTM's market cap has increased from $836.70M to $4.86B, an increase of 481.31%. That is a compound annual growth rate of 6.76%.

History

DateMarket Cap% Change
Oct 17, 20254.93B-1.37%
Dec 31, 20245.00B29.63%
Dec 29, 20233.85B5.76%
Dec 30, 20223.64B19.08%
Dec 31, 20213.06B-1.43%
Dec 31, 20203.10B-12.64%
Dec 31, 20193.55B30.26%
Dec 31, 20182.73B-14.55%
Dec 29, 20173.19B-16.36%
Dec 30, 20163.82B-7.65%
Dec 31, 20154.13B9.23%
Dec 31, 20143.78B1.57%
Dec 31, 20133.73B9.85%
Dec 31, 20123.39B-2.00%
Dec 30, 20113.46B24.24%
Dec 31, 20102.79B-5.48%
Dec 31, 20092.95B5.64%
Dec 31, 20082.79B-48.62%
Dec 31, 20075.43B-13.09%
Dec 29, 20066.25B3.79%
Dec 30, 20056.02B-13.49%
Dec 31, 20046.96B68.02%
Dec 31, 20034.14B53.15%
Dec 31, 20022.70B-4.86%
Dec 31, 20012.84B51.50%
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Market Capitalization

Market capitalization, also called net worth, is the total value of all of a company's outstanding shares. It is calculated by multiplying the stock price by the number of shares outstanding.

Formula: Market Cap = Stock Price * Shares Outstanding
Full Definition