White Mountains Insurance Group, Ltd. (WTM)

NYSE: WTM · Real-Time Price · USD

2,148.65

-16.95 (-0.78%)

At close: Mar 9, 2026, 4:00 PM EDT

2,146.00

-2.65 (-0.12%)

After-hours: Mar 9, 2026, 4:44 PM EDT

WTM Market Cap

WTM has a market cap or net worth of $5.22 billion as of March 9, 2026. Its market cap has increased by 9.36% in one year.

Market Cap

5.22B

Enterprise Value

5.87B

1-Year Change

9.36%

Ranking

#1327

Market Cap Chart

Since December 1, 1998, WTM's market cap has increased from $836.70M to $5.22B, an increase of 523.59%. That is a compound annual growth rate of 6.94%.

Market Cap History

Date	Market Cap	% Change
Mar 6, 2026	5.34B	0.70%
Dec 31, 2025	5.31B	6.21%
Dec 31, 2024	5.00B	29.63%
Dec 29, 2023	3.85B	5.76%
Dec 30, 2022	3.64B	19.08%
Dec 31, 2021	3.06B	-1.43%
Dec 31, 2020	3.10B	-12.64%
Dec 31, 2019	3.55B	30.26%
Dec 31, 2018	2.73B	-14.55%
Dec 29, 2017	3.19B	-16.36%
Dec 30, 2016	3.82B	-7.65%
Dec 31, 2015	4.13B	9.23%
Dec 31, 2014	3.78B	1.57%
Dec 31, 2013	3.73B	9.85%
Dec 31, 2012	3.39B	-2.00%
Dec 30, 2011	3.46B	24.24%
Dec 31, 2010	2.79B	-5.48%
Dec 31, 2009	2.95B	5.64%
Dec 31, 2008	2.79B	-48.62%
Dec 31, 2007	5.43B	-13.09%
Dec 29, 2006	6.25B	3.79%
Dec 30, 2005	6.02B	-13.49%
Dec 31, 2004	6.96B	68.02%
Dec 31, 2003	4.14B	53.15%
Dec 31, 2002	2.70B	-4.86%

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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

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Market Cap Rankings