WTM Stock Summary and Trading Ideas (White Mountains Insurance Group Ltd. | NYSE:WTM)

White Mountains Insurance Group Ltd is engaged in the business of making opportunistic and value-oriented acquisitions of businesses and assets in the insurance, financial services, and related sectors, operating these businesses and assets through its subsidiaries and, if and when attractive exit valuations become available, disposing of these businesses and assets. The company conducts its business in five areas: property and casualty insurance and reinsurance, municipal bond reinsurance, capital solutions for asset and wealth management firms, property and casualty insurance distribution, and other operations. The company has four reportable segments: Ark/WM Outrigger, HG Global, Kudu and Distinguished.

White Mountains Insurance Group Ltd. trades on the NYSE stock market under the symbol WTM.

As of October 16, 2026, WTM stock price climbed to $2,160.31 with 21,069 million shares trading.

WTM has a market cap of $5.16 billion. This is considered a Mid Cap stock.

In the last 3 years, WTM traded as high as $2,333.00 and as low as $1,401.01.

The top ETF exchange traded funds that WTM belongs to (by Net Assets): VTI, VB, DFSV, AVUV, DFAT.

WTM has outperformed the market in the last year with a price return of +17.0% while the SPY ETF gained +16.7%. However, in the short term, WTM had mixed performance relative to the market. It has underperformed in the last 3 months, returning -1.6% vs +1.9% return in SPY. But in the last 2 weeks, WTM shares have fared better than the market returning +6.9% compared to SPY -0.8%.

WTM support price is $2,118.26 and resistance is $2,169.20 (based on 1 day standard deviation move). This means that using the most recent 20 day stock volatility and applying a one standard deviation move around the stock's closing price, stastically there is a 67% probability that WTM shares will trade within this expected range on the day.