NYSE:WTM | Historical Stock Price | WHITE MOUNTAINS INSURANCE GROUP LTD

Complete retained daily price history on its own workbook tab. Split-adjusted close keeps every historical share price on one comparable split basis. Cumulative dividend-reinvested close is the daily close of a rebased total-return index: it starts with one share at the earliest retained close, reinvests every distribution, and normalizes every forward and reverse split exactly once. Admitted exchange opening prices remain a distinct current-session series.

Available history
1985-10-23 to 2026-09-04
Data captured

Stock Price Chart

Blue: Split-adjusted close · Orange: Cumulative dividend-reinvested close

$22.92$60.30$158.65$417.40$1,098.17$2,889.271985-10-232026-08-27

Logarithmic scale. Both lines share the same starting value for the selected range.

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Historical Stock Price — 2025

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2025-12-31$2,078.03$2,584.4114,100
2025-12-30$2,078.62$2,585.1414,200
2025-12-29$2,075.53$2,581.3011,700
2025-12-26$2,062.34$2,564.8915,800
2025-12-24$2,088.05$2,596.877,700
2025-12-23$2,090.90$2,600.4122,400
2025-12-22$2,083.14$2,590.7623,000
2025-12-19$2,042.02$2,539.6220,500
2025-12-18$2,040.00$2,537.1119,400
2025-12-17$2,046.65$2,545.3821,800
2025-12-16$2,045.31$2,543.7229,700
2025-12-15$2,068.17$2,572.1521,800
2025-12-12$2,054.51$2,555.1613,700
2025-12-11$2,044.87$2,543.1730,500
2025-12-10$2,040.94$2,538.2823,900
2025-12-09$2,018.75$2,510.6825,400
2025-12-08$2,013.52$2,504.1823,300
2025-12-05$2,034.79$2,530.6327,400
2025-12-04$2,037.79$2,534.3617,800
2025-12-03$2,025.55$2,519.1416,700
2025-12-02$2,027.41$2,521.4525,800
2025-12-01$2,024.89$2,518.3215,200
2025-11-28$2,024.25$2,517.529,300
2025-11-26$2,029.06$2,523.5113,500
2025-11-25$2,003.65$2,491.9014,500
2025-11-24$1,996.99$2,483.6224,300
2025-11-21$2,000.00$2,487.3626,600
2025-11-20$1,881.61$2,340.1226,300
2025-11-19$1,889.30$2,349.6920,700
2025-11-18$1,900.34$2,363.4221,000
2025-11-17$1,900.00$2,363.0013,600
2025-11-14$1,924.67$2,393.6820,100
2025-11-13$1,915.09$2,381.7618,400
2025-11-12$1,934.47$2,405.8716,500
2025-11-11$1,925.01$2,394.1015,800
2025-11-10$1,901.76$2,365.1819,300
2025-11-07$1,908.46$2,373.5225,100
2025-11-06$1,892.02$2,353.0730,300
2025-11-05$1,897.42$2,359.7917,200
2025-11-04$1,920.60$2,388.6228,200
2025-11-03$1,899.87$2,362.8336,700
2025-10-31$1,904.56$2,368.6727,800
2025-10-30$1,907.00$2,371.7019,300
2025-10-29$1,897.99$2,360.5022,300
2025-10-28$1,901.30$2,364.6129,500
2025-10-27$1,932.90$2,403.9123,600
2025-10-24$1,916.14$2,383.0726,700
2025-10-23$1,937.93$2,410.1730,200
2025-10-22$1,902.19$2,365.7224,500
2025-10-21$1,920.91$2,389.0017,100
2025-10-20$1,932.23$2,403.0819,100
2025-10-17$1,913.20$2,379.4132,700
2025-10-16$1,847.67$2,297.9136,100
2025-10-15$1,892.01$2,353.0636,300
2025-10-14$1,933.01$2,404.0523,300
2025-10-13$1,903.24$2,367.0338,300
2025-10-10$1,898.00$2,360.5121,200
2025-10-09$1,920.68$2,388.7123,100
2025-10-08$1,896.20$2,358.2738,200
2025-10-07$1,905.23$2,369.5039,800
2025-10-06$1,864.48$2,318.8251,500
2025-10-03$1,841.34$2,290.0488,800
2025-10-02$1,664.56$2,070.1828,800
2025-10-01$1,650.50$2,052.7027,600
2025-09-30$1,671.52$2,078.8433,800
2025-09-29$1,677.70$2,086.5250,400
2025-09-26$1,715.94$2,134.0832,300
2025-09-25$1,689.22$2,100.8531,200
2025-09-24$1,756.99$2,185.1427,500
2025-09-23$1,765.52$2,195.7538,300
2025-09-22$1,765.90$2,196.2235,500
2025-09-19$1,769.87$2,201.1645,900
2025-09-18$1,753.62$2,180.9532,900
2025-09-17$1,722.98$2,142.8429,400
2025-09-16$1,715.50$2,133.5429,400
2025-09-15$1,715.40$2,133.4140,400
2025-09-12$1,762.81$2,192.3726,600
2025-09-11$1,774.51$2,206.9333,600
2025-09-10$1,760.48$2,189.4837,400
2025-09-09$1,794.69$2,232.0282,800
2025-09-08$1,767.16$2,197.7830,900
2025-09-05$1,796.03$2,233.6920,900
2025-09-04$1,800.51$2,239.2626,900
2025-09-03$1,772.52$2,204.4533,000
2025-09-02$1,836.59$2,284.1323,800
2025-08-29$1,830.18$2,276.1620,500
2025-08-28$1,825.39$2,270.2025,000
2025-08-27$1,845.42$2,295.1237,200
2025-08-26$1,835.69$2,283.0127,000
2025-08-25$1,828.05$2,273.5124,400
2025-08-22$1,863.22$2,317.2524,100
2025-08-21$1,841.41$2,290.1320,400
2025-08-20$1,836.89$2,284.5126,000
2025-08-19$1,813.09$2,254.9128,600
2025-08-18$1,763.47$2,193.2032,800
2025-08-15$1,769.60$2,200.8241,900
2025-08-14$1,844.34$2,293.7730,100
2025-08-13$1,869.81$2,325.4521,900
2025-08-12$1,824.59$2,269.2129,600
2025-08-11$1,783.51$2,218.1237,400
2025-08-08$1,751.62$2,178.4624,400
2025-08-07$1,750.35$2,176.8849,100
2025-08-06$1,782.71$2,217.1232,000
2025-08-05$1,785.01$2,219.9821,200
2025-08-04$1,774.50$2,206.9122,700
2025-08-01$1,774.87$2,207.3716,900
2025-07-31$1,787.80$2,223.4516,100
2025-07-30$1,778.73$2,212.1715,500
2025-07-29$1,796.89$2,234.7612,100
2025-07-28$1,789.56$2,225.6413,700
2025-07-25$1,789.58$2,225.6712,100
2025-07-24$1,777.88$2,211.1215,700
2025-07-23$1,788.21$2,223.9613,900
2025-07-22$1,791.35$2,227.8721,000
2025-07-21$1,778.74$2,212.1916,800
2025-07-18$1,816.20$2,258.7726,900
2025-07-17$1,812.00$2,253.5528,500
2025-07-16$1,778.00$2,211.2734,300
2025-07-15$1,793.11$2,230.0625,200
2025-07-14$1,830.85$2,276.9924,900
2025-07-11$1,801.74$2,240.7922,500
2025-07-10$1,796.69$2,234.5145,300
2025-07-09$1,803.82$2,243.3828,700
2025-07-08$1,798.47$2,236.7251,100
2025-07-07$1,784.75$2,219.6643,600
2025-07-03$1,785.30$2,220.3530,600
2025-07-02$1,750.00$2,176.4424,800
2025-07-01$1,790.01$2,226.2020,800
2025-06-30$1,795.72$2,233.3025,300
2025-06-27$1,783.93$2,218.6427,000
2025-06-26$1,800.77$2,239.5930,800
2025-06-25$1,751.37$2,178.1526,700
2025-06-24$1,771.14$2,202.7317,000
2025-06-23$1,781.73$2,215.9119,700
2025-06-20$1,746.39$2,171.9526,400
2025-06-18$1,750.45$2,177.0017,000
2025-06-17$1,749.44$2,175.7516,500
2025-06-16$1,762.25$2,191.6816,200
2025-06-13$1,784.26$2,219.0516,900
2025-06-12$1,769.43$2,200.6119,300
2025-06-11$1,755.04$2,182.7127,400
2025-06-10$1,785.16$2,220.1735,200
2025-06-09$1,787.10$2,222.5831,400
2025-06-06$1,818.56$2,261.7120,400
2025-06-05$1,796.86$2,234.7217,400
2025-06-04$1,788.62$2,224.4724,000
2025-06-03$1,813.97$2,256.0024,100
2025-06-02$1,792.59$2,229.4116,500
2025-05-30$1,784.80$2,219.7221,400
2025-05-29$1,786.19$2,221.4511,800
2025-05-28$1,774.70$2,207.1618,800
2025-05-27$1,807.03$2,247.3711,600
2025-05-23$1,783.09$2,217.6018,900
2025-05-22$1,797.65$2,235.7035,500
2025-05-21$1,835.01$2,282.1733,600
2025-05-20$1,828.10$2,273.5716,300
2025-05-19$1,816.02$2,258.5511,500
2025-05-16$1,811.50$2,252.9317,700
2025-05-15$1,800.20$2,238.889,500
2025-05-14$1,768.95$2,200.0114,500
2025-05-13$1,784.12$2,218.8811,800
2025-05-12$1,822.93$2,267.1515,900
2025-05-09$1,796.56$2,234.3513,900
2025-05-08$1,789.11$2,225.087,900
2025-05-07$1,785.99$2,221.2010,500
2025-05-06$1,779.40$2,213.019,300
2025-05-05$1,785.97$2,221.1813,200
2025-05-02$1,788.32$2,224.1014,400
2025-05-01$1,746.93$2,172.638,400
2025-04-30$1,767.45$2,198.1515,800
2025-04-29$1,780.76$2,214.7018,700
2025-04-28$1,758.07$2,186.4811,600
2025-04-25$1,743.09$2,167.858,300
2025-04-24$1,772.10$2,203.939,300
2025-04-23$1,751.00$2,177.6911,600
2025-04-22$1,744.60$2,169.7312,900
2025-04-21$1,699.35$2,113.4514,600
2025-04-17$1,745.33$2,170.6413,900
2025-04-16$1,743.00$2,167.7414,100
2025-04-15$1,759.02$2,187.6611,700
2025-04-14$1,767.20$2,197.8313,800
2025-04-11$1,736.13$2,159.1925,000
2025-04-10$1,707.94$2,124.1322,100
2025-04-09$1,734.88$2,157.6426,500
2025-04-08$1,706.45$2,122.2818,700
2025-04-07$1,703.76$2,118.9432,400
2025-04-04$1,769.56$2,200.7731,500
2025-04-03$1,864.85$2,319.2843,000
2025-04-02$1,855.21$2,307.2921,000
2025-04-01$1,901.99$2,365.4716,800
2025-03-31$1,925.81$2,395.1017,200
2025-03-28$1,902.57$2,366.199,700
2025-03-27$1,946.64$2,421.0022,700
2025-03-26$1,899.99$2,362.9816,300
2025-03-25$1,893.00$2,354.2911,900
2025-03-24$1,884.48$2,343.6918,100
2025-03-21$1,872.52$2,328.8220,700
2025-03-20$1,873.79$2,330.4011,300
2025-03-19$1,886.53$2,346.2415,100
2025-03-18$1,865.73$2,320.378,800
2025-03-17$1,888.06$2,348.1510,500
2025-03-14$1,883.09$2,340.7221,100
2025-03-13$1,857.20$2,308.5410,500
2025-03-12$1,844.43$2,292.6724,400
2025-03-11$1,865.51$2,318.8726,700
2025-03-10$1,891.69$2,351.4122,500
2025-03-07$1,889.94$2,349.2416,700
2025-03-06$1,855.72$2,306.7012,200
2025-03-05$1,854.40$2,305.0616,100
2025-03-04$1,835.75$2,281.8818,500
2025-03-03$1,876.68$2,332.7513,000
2025-02-28$1,849.50$2,298.9711,900
2025-02-27$1,841.31$2,288.7910,000
2025-02-26$1,832.19$2,277.4517,400
2025-02-25$1,826.89$2,270.868,700
2025-02-24$1,818.58$2,260.539,100
2025-02-21$1,830.01$2,274.749,300
2025-02-20$1,857.71$2,309.1710,900
2025-02-19$1,893.20$2,353.2915,300
2025-02-18$1,871.67$2,326.5319,700
2025-02-14$1,826.18$2,269.989,400
2025-02-13$1,834.18$2,279.9310,600
2025-02-12$1,832.07$2,277.3018,800
2025-02-11$1,878.16$2,334.5915,300
2025-02-10$1,909.59$2,373.6615,400
2025-02-07$1,983.07$2,465.0011,800
2025-02-06$1,976.22$2,456.488,400
2025-02-05$1,920.86$2,387.6714,300
2025-02-04$1,905.89$2,369.069,100
2025-02-03$1,902.54$2,364.9012,500
2025-01-31$1,932.46$2,402.0915,100
2025-01-30$1,955.00$2,430.1115,700
2025-01-29$1,934.27$2,404.3414,300
2025-01-28$1,920.97$2,387.8112,600
2025-01-27$1,922.60$2,389.8318,300
2025-01-24$1,906.63$2,369.9814,400
2025-01-23$1,880.50$2,337.5012,300
2025-01-22$1,869.14$2,323.3818,000
2025-01-21$1,840.00$2,287.1610,100
2025-01-17$1,852.32$2,302.4722,200
2025-01-16$1,862.00$2,314.5114,200
2025-01-15$1,861.79$2,314.2411,400
2025-01-14$1,861.08$2,313.3616,900
2025-01-13$1,874.80$2,330.4217,500
2025-01-10$1,827.96$2,272.1919,800
2025-01-08$1,871.46$2,326.2611,800
2025-01-07$1,894.70$2,355.1522,300
2025-01-06$1,929.55$2,398.4712,000
2025-01-03$1,934.01$2,404.0215,100
2025-01-02$1,929.07$2,397.8810,700