NYSE:WTM | Stock Price History | 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.

Historical Stock Price

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2026-09-04$2,095.511,878
2026-09-03$2,117.00937
2026-09-02$2,109.75812
2026-09-01$2,112.811,509
2026-08-31$2,126.71819
2026-08-28$2,135.47785
2026-08-27$2,127.57$2,647.2323,500$2,124.621,333
2026-08-26$2,132.74$2,653.6616,100$2,138.03786
2026-08-25$2,141.20$2,664.1913,700$2,132.39570
2026-08-24$2,132.30$2,653.1119,600$2,118.601,262
2026-08-21$2,110.95$2,626.5528,900$2,127.211,039
2026-08-20$2,117.70$2,634.9521,900$2,120.00870
2026-08-19$2,129.20$2,649.2520,000$2,136.94863
2026-08-18$2,145.46$2,669.4922,600$2,133.441,811
2026-08-17$2,113.40$2,629.6017,200$2,130.90573
2026-08-14$2,137.12$2,659.1114,300$2,143.54799
2026-08-13$2,141.42$2,664.4628,700$2,122.501,724
2026-08-12$2,119.46$2,637.1427,100$2,114.77879
2026-08-11$2,112.01$2,627.8721,100$2,115.65940
2026-08-10$2,109.68$2,624.9727,200$2,155.241,526
2026-08-07$2,149.44$2,674.4430,200$2,131.16951
2026-08-06$2,141.09$2,664.0528,900$2,141.411,599
2026-08-05$2,111.91$2,627.7419,300$2,102.21901
2026-08-04$2,117.86$2,635.1423,700$2,092.521,309
2026-08-03$2,101.47$2,614.7519,900$2,118.181,105
2026-07-31$2,097.73$2,610.1012,700$2,113.00860
2026-07-30$2,118.61$2,636.0819,100$2,151.30815
2026-07-29$2,150.34$2,675.5621,200$2,183.001,650
2026-07-28$2,202.61$2,740.5917,200$2,175.601,570
2026-07-27$2,193.94$2,729.8118,600$2,192.101,067
2026-07-24$2,208.05$2,747.3611,800$2,185.98680
2026-07-23$2,176.85$2,708.5412,500$2,196.631,250
2026-07-22$2,182.32$2,715.3516,100$2,181.21643
2026-07-21$2,193.26$2,728.9613,500$2,201.51720
2026-07-20$2,211.22$2,751.3116,100$2,226.471,078
2026-07-17$2,211.52$2,751.6812,600
2026-07-16$2,196.48$2,732.9721,200
2026-07-15$2,139.73$2,662.3615,300
2026-07-14$2,167.79$2,697.2721,200
2026-07-13$2,174.96$2,706.1916,000
2026-07-10$2,181.19$2,713.9418,500
2026-07-09$2,185.23$2,718.9725,900
2026-07-08$2,167.25$2,696.6018,400
2026-07-07$2,165.85$2,694.8614,300
2026-07-06$2,166.27$2,695.3814,600
2026-07-02$2,173.81$2,704.7625,500
2026-07-01$2,064.04$2,568.1817,600
2026-06-30$2,073.39$2,579.8116,700
2026-06-29$2,090.94$2,601.6513,200
2026-06-26$2,096.56$2,608.6426,300
2026-06-25$2,019.70$2,513.0114,400
2026-06-24$2,022.41$2,516.3813,800
2026-06-23$2,023.63$2,517.9016,400
2026-06-22$2,010.75$2,501.8713,200
2026-06-18$2,013.36$2,505.1225,500
2026-06-17$2,003.49$2,492.8421,600
2026-06-16$2,032.37$2,528.7720,700
2026-06-15$2,030.64$2,526.6231,000
2026-06-12$2,024.05$2,518.4217,700
2026-06-11$1,989.54$2,475.4817,000
2026-06-10$2,018.89$2,512.0023,500
2026-06-09$2,004.76$2,494.4226,500
2026-06-08$2,023.70$2,517.9929,200
2026-06-05$2,065.14$2,569.5522,300
2026-06-04$2,015.54$2,507.8329,900
2026-06-03$2,034.02$2,530.8345,000
2026-06-02$2,050.81$2,551.7223,500
2026-06-01$2,062.03$2,565.6824,200
2026-05-29$2,064.82$2,569.1525,800
2026-05-28$2,084.31$2,593.4023,500
2026-05-27$2,101.94$2,615.3427,700
2026-05-26$2,129.17$2,649.2216,900
2026-05-22$2,146.85$2,671.2216,600
2026-05-21$2,139.09$2,661.5622,400
2026-05-20$2,144.81$2,668.6818,200
2026-05-19$2,144.19$2,667.9129,100
2026-05-18$2,138.35$2,660.6417,900
2026-05-15$2,136.76$2,658.6621,200
2026-05-14$2,112.72$2,628.7527,700
2026-05-13$2,119.91$2,637.7023,000
2026-05-12$2,109.20$2,624.3722,400
2026-05-11$2,133.58$2,654.7021,000
2026-05-08$2,128.40$2,648.2618,800
2026-05-07$2,092.50$2,603.5926,200
2026-05-06$2,080.00$2,588.0438,300
2026-05-05$2,151.67$2,677.2117,300
2026-05-04$2,167.41$2,696.8026,800
2026-05-01$2,163.50$2,691.9319,500
2026-04-30$2,231.99$2,777.1510,900
2026-04-29$2,206.00$2,744.8112,700
2026-04-28$2,263.69$2,816.5916,500
2026-04-27$2,267.56$2,821.4116,000
2026-04-24$2,259.27$2,811.0915,300
2026-04-23$2,285.39$2,843.599,400
2026-04-22$2,269.19$2,823.4414,700
2026-04-21$2,276.34$2,832.3310,200
2026-04-20$2,275.01$2,830.6814,100
2026-04-17$2,319.41$2,885.9214,200
2026-04-16$2,294.72$2,855.2010,800
2026-04-15$2,291.46$2,851.1515,900