White Mountains Insurance Group (WTM) Stock Chart & Stock Price History $1,811.30 -0.70 (-0.04%) Closing price 07/18/2025 03:59 PM EasternExtended Trading$1,815.02 +3.72 (+0.21%) As of 07/18/2025 05:34 PM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more. Add Compare Share Share Chart Stock AnalysisChartCompetitorsDividendEarningsFinancialsHeadlinesInsider TradesOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock White Mountains Insurance Group Stock Price Performance The White Mountains Insurance Group (WTM) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has increased 5.01%, with a year-to-date return of -6.88%. In the past month, the stock has increased 3.58%, reflecting recent market activity. As of the latest close, White Mountains Insurance Group traded at $1,811.30 with a market cap of $4.66 billion and volume of 26,946 shares. Five years ago, the stock traded at $869.75, representing a 108.25% increase over that period. At the time, it had a market cap of $2.72 billion and a volume of 9,600 shares. Receive WTM Stock News and Ratings via EmailSign-up to receive the latest news and ratings for White Mountains Insurance Group and its competitors with MarketBeat's FREE daily newsletter. Email Address 5 Day Performance-1.07%1 Month Performance+3.58%3 Month Performance+3.81%Year-To-Date Performance-6.88%1 Year Performance+5.01%5 Year Performance+108.25% WTM Stock Chart for Saturday, July, 19, 2025 WTM Chart by TradingView White Mountains Insurance Group Stock Price History Daily Weekly Monthly Yearly Time Frame Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year 3 Year 5 Year Time Frame Start Date End Date Export to Excel DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization07/18/2025$1,809.45$1,811.30+0.10%$1,824.80$1,801.6726,946 shs$4.66 billion07/17/2025$1,780.71$1,809.45+1.61%$1,812.00$1,774.0028,542 shs$4.65 billion07/16/2025$1,799.04$1,780.71-1.02%$1,820.75$1,778.0034,328 shs$4.58 billion07/15/2025$1,830.82$1,799.04-1.74%$1,823.00$1,793.1125,176 shs$4.62 billion07/14/2025$1,798.34$1,830.82+1.81%$1,831.19$1,805.1024,898 shs$4.71 billion07/11/2025$1,794.40$1,798.34+0.22%$1,801.74$1,787.0022,480 shs$4.62 billion07/10/2025$1,801.20$1,794.40-0.38%$1,807.94$1,788.1445,276 shs$4.61 billion07/09/2025$1,799.50$1,801.20+0.09%$1,820.71$1,798.7628,739 shs$4.64 billion07/08/2025$1,782.38$1,799.50+0.96%$1,815.00$1,793.8851,058 shs$4.62 billion07/07/2025$1,785.30$1,782.38-0.16%$1,802.00$1,781.5943,575 shs$4.58 billion Get the Latest News and Ratings for WTM and Related StocksEnter your email address below to receive the latest news and analysts' ratings for White Mountains Insurance Group and its competitors with MarketBeat's FREE daily newsletter. 07/04/2025$1,785.30$1,785.30$1,788.90$1,756.4030,626 shs$4.59 billion07/03/2025$1,757.40$1,785.30+1.59%$1,788.90$1,756.4030,626 shs$4.59 billion07/02/2025$1,791.54$1,757.40-1.91%$1,762.00$1,750.0024,823 shs$4.52 billion07/01/2025$1,789.99$1,791.54+0.09%$1,805.24$1,790.0120,771 shs$4.60 billion06/30/2025$1,784.83$1,789.99+0.29%$1,805.57$1,785.4225,285 shs$4.61 billion06/27/2025$1,804.37$1,784.83-1.08%$1,817.50$1,763.8227,045 shs$4.59 billion06/26/2025$1,751.88$1,804.37+3.00%$1,806.44$1,755.7430,849 shs$4.64 billion06/25/2025$1,775.71$1,751.88-1.34%$1,766.00$1,749.8926,698 shs$4.50 billion06/24/2025$1,783.75$1,775.71-0.45%$1,781.17$1,767.1816,963 shs$4.56 billion06/23/2025$1,746.92$1,783.75+2.11%$1,786.27$1,745.2519,656 shs$4.58 billion06/20/2025$1,748.62$1,746.92-0.10%$1,770.71$1,741.2826,413 shs$4.49 billion06/19/2025$1,748.62$1,748.62$1,772.04$1,750.0817,041 shs$4.49 billion06/18/2025$1,748.58$1,748.62+0.00%$1,772.04$1,750.0817,041 shs$4.49 billion Related Companies Erie Indemnity Stock Chart Fidelity National Financial Stock Chart CNA Financial Stock Chart Old Republic International Stock Chart Axis Capital Stock Chart RLI Stock Chart The Hanover Insurance Group Stock Chart First American Financial Stock Chart Selective Insurance Group Stock Chart Assured Guaranty Stock Chart Receive WTM Stock News and Ratings via EmailSign-up to receive the latest news and ratings for White Mountains Insurance Group and its competitors with MarketBeat's FREE daily newsletter. 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