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 — 2010

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2010-12-31$335.60$409.3616,800
2010-12-30$337.12$411.215,700
2010-12-29$338.00$412.282,700
2010-12-28$336.60$410.589,000
2010-12-27$336.20$410.095,700
2010-12-23$334.43$407.939,400
2010-12-22$336.16$410.0418,100
2010-12-21$331.44$404.288,500
2010-12-20$329.70$402.1620,000
2010-12-17$327.00$398.8748,400
2010-12-16$324.00$395.2125,300
2010-12-15$323.26$394.3016,800
2010-12-14$324.45$395.7612,800
2010-12-13$320.51$390.9510,000
2010-12-10$317.62$387.4222,500
2010-12-09$315.56$384.9119,300
2010-12-08$314.86$384.0617,400
2010-12-07$314.99$384.2218,400
2010-12-06$313.73$382.6814,600
2010-12-03$316.50$386.0614,700
2010-12-02$320.15$390.5114,400
2010-12-01$315.00$384.2319,000
2010-11-30$317.50$387.2838,000
2010-11-29$321.66$392.359,700
2010-11-26$320.50$390.942,800
2010-11-24$322.38$393.2314,900
2010-11-23$318.90$388.9916,100
2010-11-22$321.00$391.5510,500
2010-11-19$322.00$392.775,700
2010-11-18$319.20$389.3512,500
2010-11-17$318.53$388.537,700
2010-11-16$318.32$388.2821,800
2010-11-15$322.45$393.3212,400
2010-11-12$320.06$390.4015,400
2010-11-11$318.19$388.1211,200
2010-11-10$320.33$390.7314,300
2010-11-09$313.19$382.0214,000
2010-11-08$318.26$388.2111,300
2010-11-05$324.80$396.188,400
2010-11-04$325.89$397.5129,300
2010-11-03$318.36$388.3315,200
2010-11-02$324.10$395.339,800
2010-11-01$321.80$392.5211,800
2010-10-29$319.20$389.3518,800
2010-10-28$317.35$387.108,900
2010-10-27$319.88$390.189,800
2010-10-26$321.87$392.6124,700
2010-10-25$321.50$392.1612,000
2010-10-22$320.00$390.335,300
2010-10-21$317.50$387.2810,600
2010-10-20$319.60$389.848,000
2010-10-19$318.22$388.1619,400
2010-10-18$321.25$391.8516,800
2010-10-15$318.30$388.2521,700
2010-10-14$312.33$380.9724,900
2010-10-13$311.47$379.9229,000
2010-10-12$313.15$381.9715,200
2010-10-11$311.01$379.367,000
2010-10-08$311.74$380.2511,700
2010-10-07$308.50$376.3017,400
2010-10-06$307.56$375.1514,900
2010-10-05$310.74$379.0317,300
2010-10-04$309.03$376.9516,900
2010-10-01$311.36$379.7921,500
2010-09-30$308.46$376.2521,500
2010-09-29$310.55$378.806,800
2010-09-28$311.84$380.3718,200
2010-09-27$306.37$373.7012,900
2010-09-24$309.00$376.9122,600
2010-09-23$306.25$373.5619,100
2010-09-22$310.06$378.2013,300
2010-09-21$313.16$381.9811,300
2010-09-20$315.90$385.3320,100
2010-09-17$313.10$381.9129,600
2010-09-16$309.37$377.3611,700
2010-09-15$309.60$377.6420,200
2010-09-14$308.22$375.9614,000
2010-09-13$310.89$379.2225,800
2010-09-10$310.63$378.9011,700
2010-09-09$311.96$380.5213,100
2010-09-08$312.17$380.787,700
2010-09-07$311.01$379.3613,800
2010-09-03$316.55$386.1214,400
2010-09-02$312.00$380.5723,300
2010-09-01$312.20$380.8123,100
2010-08-31$303.58$370.3036,100
2010-08-30$301.56$367.8319,000
2010-08-27$305.92$373.1520,400
2010-08-26$299.10$364.8316,000
2010-08-25$301.96$368.3215,200
2010-08-24$297.22$362.5413,900
2010-08-23$303.19$369.827,100
2010-08-20$303.71$370.4612,800
2010-08-19$306.45$373.8012,000
2010-08-18$308.18$375.916,800
2010-08-17$308.50$376.3012,700
2010-08-16$306.90$374.356,700
2010-08-13$306.28$373.5914,300
2010-08-12$307.25$374.7818,000
2010-08-11$309.00$376.9116,300
2010-08-10$316.25$385.7513,500
2010-08-09$323.50$394.6018,400
2010-08-06$320.50$390.9427,200
2010-08-05$320.00$390.3317,200
2010-08-04$320.70$391.1811,000
2010-08-03$318.50$388.5034,400
2010-08-02$320.00$390.3325,900
2010-07-30$314.05$383.0722,800
2010-07-29$325.90$397.5222,600
2010-07-28$325.45$396.9810,800
2010-07-27$330.75$403.4413,100
2010-07-26$331.80$404.7220,300
2010-07-23$329.00$401.3114,400
2010-07-22$328.11$400.2225,800
2010-07-21$318.38$388.3520,400
2010-07-20$326.12$397.7918,400
2010-07-19$326.81$398.6324,400
2010-07-16$320.85$391.3619,300
2010-07-15$327.77$399.8116,100
2010-07-14$331.12$403.8930,200
2010-07-13$333.00$406.1829,300
2010-07-12$328.18$400.3115,900
2010-07-09$331.70$404.6033,200
2010-07-08$328.41$400.5923,700
2010-07-07$325.61$397.1735,900
2010-07-06$325.00$396.4334,700
2010-07-02$323.40$394.4717,200
2010-07-01$325.50$397.0417,600
2010-06-30$324.20$395.4549,600
2010-06-29$330.38$402.9941,300
2010-06-28$337.85$412.1019,300
2010-06-25$340.00$414.7258,400
2010-06-24$330.75$403.4439,200
2010-06-23$332.73$405.8631,300
2010-06-22$338.00$412.2830,300
2010-06-21$340.73$415.6112,400
2010-06-18$341.75$416.8622,500
2010-06-17$339.12$413.6530,200
2010-06-16$343.80$419.3633,300
2010-06-15$339.80$414.4831,600
2010-06-14$333.76$407.1136,700
2010-06-11$322.40$393.2543,700
2010-06-10$324.68$396.0432,200
2010-06-09$318.10$388.0138,600
2010-06-08$323.34$394.4033,800
2010-06-07$320.41$390.8325,500
2010-06-04$319.50$389.7228,500
2010-06-03$324.30$395.5734,600
2010-06-02$334.50$408.0123,500
2010-06-01$326.70$398.5031,100
2010-05-28$326.80$398.6230,600
2010-05-27$327.89$399.9518,500
2010-05-26$309.89$378.0022,400
2010-05-25$312.81$381.5613,600
2010-05-24$312.50$381.1817,100
2010-05-21$319.10$389.2324,900
2010-05-20$311.00$379.3529,900
2010-05-19$327.14$399.0421,900
2010-05-18$325.00$396.4328,300
2010-05-17$331.36$404.1821,500
2010-05-14$325.55$397.1031,600
2010-05-13$334.20$407.6524,100
2010-05-12$338.99$413.4921,000
2010-05-11$329.41$401.8126,000
2010-05-10$331.35$404.1735,300
2010-05-07$321.96$392.7248,800
2010-05-06$318.00$387.8962,300
2010-05-05$327.44$399.4031,200
2010-05-04$331.80$404.7237,600
2010-05-03$345.71$421.6921,600
2010-04-30$343.60$419.1118,300
2010-04-29$347.54$423.9225,000
2010-04-28$356.00$434.2423,000
2010-04-27$354.00$431.8023,300
2010-04-26$355.28$433.3613,500
2010-04-23$360.12$439.2614,500
2010-04-22$359.80$438.8713,100
2010-04-21$358.83$437.6915,600
2010-04-20$359.00$437.9020,900
2010-04-19$359.88$438.979,800
2010-04-16$362.50$442.1721,100
2010-04-15$362.90$442.6615,700
2010-04-14$360.00$439.1214,000
2010-04-13$358.90$437.784,800
2010-04-12$360.00$439.1215,700
2010-04-09$356.68$435.078,400
2010-04-08$358.00$436.689,400
2010-04-07$361.00$440.3415,200
2010-04-06$360.32$439.5116,700
2010-04-05$360.66$439.9212,100
2010-04-01$358.15$436.8615,700
2010-03-31$355.00$433.0218,500
2010-03-30$353.58$431.2911,500
2010-03-29$353.25$430.8915,700
2010-03-26$352.25$429.6713,600
2010-03-25$355.00$433.027,200
2010-03-24$358.04$436.7311,900
2010-03-23$354.60$432.5311,400
2010-03-22$353.30$430.956,300
2010-03-19$356.95$435.4025,200
2010-03-18$354.50$432.4113,700
2010-03-17$355.95$432.969,000
2010-03-16$355.19$432.036,800
2010-03-15$351.00$426.9412,200
2010-03-12$353.00$429.3716,000
2010-03-11$352.50$428.7617,000
2010-03-10$351.98$428.1341,300
2010-03-09$348.57$423.989,800
2010-03-08$350.68$426.5515,400
2010-03-05$349.57$425.2017,100
2010-03-04$350.80$426.6911,900
2010-03-03$349.60$425.235,700
2010-03-02$349.90$425.6013,100
2010-03-01$350.50$426.3313,700
2010-02-26$346.64$421.6313,600
2010-02-25$343.63$417.9724,300
2010-02-24$340.60$414.295,900
2010-02-23$338.50$411.7311,200
2010-02-22$341.73$415.6616,100
2010-02-19$333.00$405.0418,200
2010-02-18$331.60$403.3433,100
2010-02-17$333.25$405.3517,100
2010-02-16$334.00$406.2614,600
2010-02-12$330.00$401.3917,800
2010-02-11$327.01$397.7610,200
2010-02-10$327.75$398.6613,100
2010-02-09$324.10$394.2219,200
2010-02-08$317.20$385.8322,300
2010-02-05$325.00$395.3116,000
2010-02-04$321.04$390.5024,200
2010-02-03$316.98$385.5614,400
2010-02-02$324.75$395.015,400
2010-02-01$320.26$389.5511,000
2010-01-29$320.47$389.8014,200
2010-01-28$325.90$396.415,200
2010-01-27$331.00$402.618,300
2010-01-26$325.60$396.0411,600
2010-01-25$328.00$398.9613,400
2010-01-22$328.50$399.578,200
2010-01-21$333.50$405.6536,200
2010-01-20$331.50$403.2213,800
2010-01-19$332.00$403.8318,300
2010-01-15$321.00$390.4524,600
2010-01-14$330.15$401.5821,700
2010-01-13$333.31$405.4215,400
2010-01-12$328.15$399.1414,900
2010-01-11$330.00$401.3914,100
2010-01-08$329.00$400.189,600
2010-01-07$334.98$407.4510,300
2010-01-06$336.17$408.9022,000
2010-01-05$333.95$406.2018,600
2010-01-04$335.50$408.0812,000