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 — 2019

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2019-12-31$1,115.51$1,380.638,300——
2019-12-30$1,118.44$1,384.268,000——
2019-12-27$1,098.02$1,358.9813,600——
2019-12-26$1,105.42$1,368.146,900——
2019-12-24$1,119.00$1,384.953,300——
2019-12-23$1,113.00$1,377.528,100——
2019-12-20$1,117.20$1,382.7215,600——
2019-12-19$1,116.83$1,382.269,800——
2019-12-18$1,119.23$1,385.2314,700——
2019-12-17$1,129.11$1,397.4611,100——
2019-12-16$1,115.62$1,380.778,400——
2019-12-13$1,111.82$1,376.0611,800——
2019-12-12$1,098.00$1,358.9611,500——
2019-12-11$1,109.80$1,373.567,700——
2019-12-10$1,111.69$1,375.908,800——
2019-12-09$1,102.42$1,364.435,000——
2019-12-06$1,099.10$1,360.327,500——
2019-12-05$1,094.90$1,355.126,800——
2019-12-04$1,082.88$1,340.247,300——
2019-12-03$1,097.89$1,358.825,800——
2019-12-02$1,102.25$1,364.229,500——
2019-11-29$1,106.92$1,370.002,900——
2019-11-27$1,108.00$1,371.338,200——
2019-11-26$1,091.28$1,350.6414,100——
2019-11-25$1,082.68$1,340.0010,400——
2019-11-22$1,082.46$1,339.726,800——
2019-11-21$1,097.00$1,357.728,000——
2019-11-20$1,096.71$1,357.3617,000——
2019-11-19$1,084.79$1,342.6112,600——
2019-11-18$1,083.47$1,340.9711,600——
2019-11-15$1,087.00$1,345.3411,200——
2019-11-14$1,108.45$1,371.898,200——
2019-11-13$1,099.00$1,360.208,500——
2019-11-12$1,096.80$1,357.476,600——
2019-11-11$1,100.58$1,362.159,500——
2019-11-08$1,099.68$1,361.045,300——
2019-11-07$1,090.57$1,349.7614,000——
2019-11-06$1,087.80$1,346.336,900——
2019-11-05$1,081.87$1,338.999,600——
2019-11-04$1,080.50$1,337.3011,100——
2019-11-01$1,075.85$1,331.5412,500——
2019-10-31$1,071.00$1,325.5411,700——
2019-10-30$1,060.37$1,312.3810,300——
2019-10-29$1,067.74$1,321.5112,100——
2019-10-28$1,058.42$1,309.9717,700——
2019-10-25$1,074.62$1,330.0210,800——
2019-10-24$1,083.90$1,341.5113,900——
2019-10-23$1,075.67$1,331.3227,100——
2019-10-22$1,070.31$1,324.6922,600——
2019-10-21$1,089.01$1,347.8313,500——
2019-10-18$1,087.34$1,345.7615,600——
2019-10-17$1,083.04$1,340.4414,700——
2019-10-16$1,074.05$1,329.3213,100——
2019-10-15$1,067.80$1,321.5814,600——
2019-10-14$1,067.00$1,320.5912,800——
2019-10-11$1,072.50$1,327.4021,000——
2019-10-10$1,074.99$1,330.4818,600——
2019-10-09$1,070.02$1,324.3327,300——
2019-10-08$1,064.50$1,317.5025,800——
2019-10-07$1,077.30$1,333.3426,200——
2019-10-04$1,086.39$1,344.5920,600——
2019-10-03$1,072.30$1,327.1535,800——
2019-10-02$1,068.85$1,322.8826,400——
2019-10-01$1,072.56$1,327.4721,600——
2019-09-30$1,080.00$1,336.6825,200——
2019-09-27$1,068.90$1,322.9427,200——
2019-09-26$1,077.60$1,333.7124,900——
2019-09-25$1,084.88$1,342.7220,500——
2019-09-24$1,084.50$1,342.2522,100——
2019-09-23$1,078.90$1,335.3217,100——
2019-09-20$1,075.30$1,330.8642,400——
2019-09-19$1,085.00$1,342.8716,500——
2019-09-18$1,088.00$1,346.5825,100——
2019-09-17$1,082.30$1,339.5324,500——
2019-09-16$1,071.88$1,326.639,600——
2019-09-13$1,070.96$1,325.4925,800——
2019-09-12$1,067.97$1,321.7921,300——
2019-09-11$1,078.62$1,334.9716,000——
2019-09-10$1,076.21$1,331.9924,400——
2019-09-09$1,073.08$1,328.1210,800——
2019-09-06$1,073.01$1,328.0327,900——
2019-09-05$1,076.66$1,332.5532,400——
2019-09-04$1,077.75$1,333.9018,400——
2019-09-03$1,061.44$1,313.7119,000——
2019-08-30$1,060.70$1,312.7915,800——
2019-08-29$1,054.20$1,304.7528,200——
2019-08-28$1,047.89$1,296.9417,600——
2019-08-27$1,052.50$1,302.6424,600——
2019-08-26$1,069.60$1,323.8119,500——
2019-08-23$1,061.00$1,313.1618,200——
2019-08-22$1,080.00$1,336.6815,400——
2019-08-21$1,074.00$1,329.2520,700——
2019-08-20$1,076.44$1,332.2725,400——
2019-08-19$1,089.00$1,347.8218,700——
2019-08-16$1,078.90$1,335.3215,500——
2019-08-15$1,066.12$1,319.5023,100——
2019-08-14$1,065.97$1,319.3226,800——
2019-08-13$1,090.37$1,349.5111,300——
2019-08-12$1,089.96$1,349.0121,200——
2019-08-09$1,093.91$1,353.9017,600——
2019-08-08$1,085.42$1,343.3913,700——
2019-08-07$1,082.92$1,340.2911,600——
2019-08-06$1,071.35$1,325.9710,900——
2019-08-05$1,065.00$1,318.127,900——
2019-08-02$1,076.57$1,332.4312,000——
2019-08-01$1,074.08$1,329.3523,300——
2019-07-31$1,076.00$1,331.7319,100——
2019-07-30$1,071.00$1,325.5412,800——
2019-07-29$1,059.70$1,311.5611,000——
2019-07-26$1,067.39$1,321.0712,000——
2019-07-25$1,063.21$1,315.9012,100——
2019-07-24$1,050.28$1,299.9013,000——
2019-07-23$1,038.39$1,285.188,100——
2019-07-22$1,036.45$1,282.7810,100——
2019-07-19$1,043.00$1,290.8912,400——
2019-07-18$1,051.43$1,301.3222,300——
2019-07-17$1,042.20$1,289.9013,800——
2019-07-16$1,038.61$1,285.4525,300——
2019-07-15$1,043.51$1,291.526,600——
2019-07-12$1,044.00$1,292.1212,300——
2019-07-11$1,043.90$1,292.0026,100——
2019-07-10$1,047.97$1,297.0413,800——
2019-07-09$1,049.70$1,299.1814,300——
2019-07-08$1,046.50$1,295.2220,500——
2019-07-05$1,059.50$1,311.3115,800——
2019-07-03$1,052.20$1,302.2725,200——
2019-07-02$1,059.66$1,311.5123,600——
2019-07-01$1,041.00$1,288.4114,600——
2019-06-28$1,021.46$1,264.2326,700——
2019-06-27$1,015.90$1,257.3516,400——
2019-06-26$1,026.50$1,270.4718,900——
2019-06-25$1,038.20$1,284.9530,300——
2019-06-24$1,030.41$1,275.3041,200——
2019-06-21$1,022.89$1,266.0046,300——
2019-06-20$1,023.01$1,266.1534,100——
2019-06-19$1,019.03$1,261.2218,300——
2019-06-18$1,016.83$1,258.5011,000——
2019-06-17$1,009.88$1,249.8910,700——
2019-06-14$1,018.00$1,259.9418,200——
2019-06-13$1,008.97$1,248.7711,500——
2019-06-12$1,012.32$1,252.9116,100——
2019-06-11$993.40$1,229.5013,300——
2019-06-10$1,002.65$1,240.9515,500——
2019-06-07$991.65$1,227.338,800——
2019-06-06$986.20$1,220.5915,400——
2019-06-05$992.55$1,228.4516,900——
2019-06-04$983.14$1,216.8018,000——
2019-06-03$983.99$1,217.8517,900——
2019-05-31$979.60$1,212.4211,600——
2019-05-30$966.69$1,196.4411,400——
2019-05-29$974.20$1,205.7411,600——
2019-05-28$976.62$1,208.736,000——
2019-05-24$968.14$1,198.233,600——
2019-05-23$969.00$1,199.3014,800——
2019-05-22$975.14$1,206.9012,000——
2019-05-21$962.24$1,190.9311,200——
2019-05-20$958.94$1,186.8512,400——
2019-05-17$969.65$1,200.1013,800——
2019-05-16$973.31$1,204.6328,600——
2019-05-15$949.57$1,175.2511,600——
2019-05-14$944.43$1,168.8913,200——
2019-05-13$946.59$1,171.5611,100——
2019-05-10$966.80$1,196.588,600——
2019-05-09$975.99$1,207.9539,700——
2019-05-08$955.87$1,183.0514,800——
2019-05-07$932.63$1,154.2914,700——
2019-05-06$931.00$1,152.2724,600——
2019-05-03$941.09$1,164.7610,500——
2019-05-02$924.04$1,143.657,400——
2019-05-01$920.95$1,139.8312,700——
2019-04-30$939.04$1,162.2211,900——
2019-04-29$937.95$1,160.8710,100——
2019-04-26$943.53$1,167.7816,200——
2019-04-25$927.08$1,147.4214,000——
2019-04-24$930.45$1,151.5910,800——
2019-04-23$925.58$1,145.5610,600——
2019-04-22$911.09$1,127.637,800——
2019-04-18$913.44$1,130.534,600——
2019-04-17$912.50$1,129.376,600——
2019-04-16$912.32$1,129.154,500——
2019-04-15$912.30$1,129.125,000——
2019-04-12$912.65$1,129.568,000——
2019-04-11$912.92$1,129.894,100——
2019-04-10$911.86$1,128.5811,100——
2019-04-09$913.40$1,130.488,000——
2019-04-08$921.30$1,140.2610,900——
2019-04-05$917.09$1,135.057,900——
2019-04-04$917.91$1,136.079,400——
2019-04-03$924.07$1,143.697,300——
2019-04-02$924.28$1,143.9514,900——
2019-04-01$925.00$1,144.849,800——
2019-03-29$925.48$1,145.4414,900——
2019-03-28$924.70$1,144.4719,900——
2019-03-27$924.26$1,143.9310,100——
2019-03-26$921.73$1,140.798,200——
2019-03-25$918.63$1,136.9613,100——
2019-03-22$926.03$1,146.128,000——
2019-03-21$917.70$1,135.817,000——
2019-03-20$914.00$1,131.238,200——
2019-03-19$925.11$1,144.9815,900——
2019-03-18$926.09$1,146.1910,700——
2019-03-15$919.00$1,137.4218,600——
2019-03-14$919.48$1,136.7712,100——
2019-03-13$912.93$1,128.6711,100——
2019-03-12$908.14$1,122.7512,800——
2019-03-11$908.40$1,123.0711,400——
2019-03-08$920.00$1,137.427,500——
2019-03-07$937.68$1,159.2711,400——
2019-03-06$954.48$1,180.049,700——
2019-03-05$953.99$1,179.4410,600——
2019-03-04$945.00$1,168.3212,300——
2019-03-01$937.95$1,159.6111,000——
2019-02-28$939.39$1,161.3912,300——
2019-02-27$934.70$1,155.5913,500——
2019-02-26$924.42$1,142.888,200——
2019-02-25$924.66$1,143.185,600——
2019-02-22$921.07$1,138.747,800——
2019-02-21$914.00$1,130.006,900——
2019-02-20$911.89$1,127.397,800——
2019-02-19$904.83$1,118.665,400——
2019-02-15$906.00$1,120.1114,800——
2019-02-14$900.46$1,113.2613,600——
2019-02-13$903.51$1,117.0311,000——
2019-02-12$915.34$1,131.6516,300——
2019-02-11$923.05$1,141.1915,300——
2019-02-08$906.20$1,120.358,300——
2019-02-07$903.36$1,116.8416,600——
2019-02-06$893.35$1,104.4716,500——
2019-02-05$893.68$1,104.8816,500——
2019-02-04$900.85$1,113.749,700——
2019-02-01$895.00$1,106.5110,200——
2019-01-31$893.58$1,104.7513,500——
2019-01-30$889.40$1,099.5816,200——
2019-01-29$889.42$1,099.6110,100——
2019-01-28$899.00$1,111.455,600——
2019-01-25$896.57$1,108.4510,500——
2019-01-24$892.16$1,103.006,900——
2019-01-23$893.61$1,104.7913,900——
2019-01-22$884.76$1,093.856,700——
2019-01-18$892.00$1,102.8015,800——
2019-01-17$880.73$1,088.8616,000——
2019-01-16$888.23$1,098.1410,100——
2019-01-15$886.16$1,095.5810,800——
2019-01-14$889.29$1,099.4515,900——
2019-01-11$881.06$1,089.2714,200——
2019-01-10$875.00$1,081.7814,700——
2019-01-09$878.88$1,086.5825,800——
2019-01-08$877.56$1,084.9522,400——
2019-01-07$856.91$1,059.4216,300——
2019-01-04$854.43$1,056.3512,100——
2019-01-03$850.75$1,051.8010,500——
2019-01-02$855.00$1,057.0511,900——