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 — 2011

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2011-12-30$453.46$554.705,000
2011-12-29$450.00$550.475,200
2011-12-28$447.80$547.775,400
2011-12-27$452.70$553.776,800
2011-12-23$447.75$547.716,600
2011-12-22$448.42$548.537,400
2011-12-21$445.21$544.6114,600
2011-12-20$439.69$537.8514,500
2011-12-19$422.50$516.8326,200
2011-12-16$427.06$522.4021,300
2011-12-15$429.66$525.5814,500
2011-12-14$437.00$534.5618,000
2011-12-13$438.94$536.947,500
2011-12-12$437.02$534.598,500
2011-12-09$440.00$538.2313,500
2011-12-08$437.27$534.8916,800
2011-12-07$438.48$536.379,400
2011-12-06$433.90$530.7716,800
2011-12-05$430.70$526.8612,200
2011-12-02$425.58$520.5910,000
2011-12-01$422.51$516.8410,700
2011-11-30$424.40$519.1537,500
2011-11-29$411.72$503.6420,600
2011-11-28$417.60$510.8318,600
2011-11-25$412.00$503.9810,900
2011-11-23$407.44$498.4011,400
2011-11-22$413.31$505.5820,100
2011-11-21$416.00$508.8711,100
2011-11-18$423.19$517.675,300
2011-11-17$421.12$515.1412,100
2011-11-16$418.90$512.4219,500
2011-11-15$421.53$515.6419,400
2011-11-14$423.00$517.447,900
2011-11-11$428.98$524.756,600
2011-11-10$429.50$525.397,700
2011-11-09$426.50$521.7218,500
2011-11-08$428.35$523.9810,500
2011-11-07$427.99$523.5411,100
2011-11-04$424.54$519.324,300
2011-11-03$430.23$526.2810,300
2011-11-02$424.55$519.3315,200
2011-11-01$415.65$508.4520,800
2011-10-31$420.00$513.776,300
2011-10-28$429.54$525.447,000
2011-10-27$435.85$533.1614,300
2011-10-26$418.00$511.3215,500
2011-10-25$415.00$507.657,200
2011-10-24$423.61$518.1817,900
2011-10-21$420.75$514.6944,700
2011-10-20$415.00$507.6511,200
2011-10-19$413.85$506.2413,000
2011-10-18$417.00$510.1018,400
2011-10-17$414.78$507.3814,700
2011-10-14$420.45$514.3217,300
2011-10-13$411.12$502.9119,500
2011-10-12$406.02$496.6715,900
2011-10-11$400.84$490.3310,600
2011-10-10$406.06$496.7219,500
2011-10-07$398.21$487.1113,200
2011-10-06$412.45$504.5314,000
2011-10-05$406.73$497.5413,000
2011-10-04$414.45$506.9828,100
2011-10-03$403.90$494.0721,100
2011-09-30$405.75$496.3427,300
2011-09-29$404.90$495.3013,200
2011-09-28$396.00$484.4113,800
2011-09-27$398.42$487.3722,000
2011-09-26$405.94$496.5712,900
2011-09-23$393.50$481.3518,000
2011-09-22$394.02$481.9926,900
2011-09-21$397.27$485.9612,600
2011-09-20$403.00$492.9731,600
2011-09-19$400.00$489.307,900
2011-09-16$407.02$497.8922,600
2011-09-15$408.30$499.4617,600
2011-09-14$402.32$492.1412,400
2011-09-13$394.00$481.968,100
2011-09-12$393.75$481.6616,800
2011-09-09$390.15$477.2522,800
2011-09-08$390.50$477.6819,900
2011-09-07$392.80$480.5017,900
2011-09-06$391.91$479.4121,000
2011-09-02$393.70$481.6016,800
2011-09-01$396.11$484.5416,200
2011-08-31$400.00$489.3024,600
2011-08-30$398.00$486.8641,600
2011-08-29$400.00$489.3043,400
2011-08-26$394.81$482.9511,900
2011-08-25$395.75$484.107,500
2011-08-24$403.70$493.8311,300
2011-08-23$401.83$491.5420,200
2011-08-22$397.85$486.6715,900
2011-08-19$408.06$499.1610,700
2011-08-18$401.11$490.6620,900
2011-08-17$410.02$501.5617,300
2011-08-16$403.00$492.978,200
2011-08-15$409.29$500.6712,900
2011-08-12$405.00$495.4210,200
2011-08-11$411.25$503.0615,900
2011-08-10$391.00$478.2917,500
2011-08-09$413.39$505.6836,600
2011-08-08$377.00$461.1729,700
2011-08-05$403.15$493.1613,000
2011-08-04$405.00$495.4214,900
2011-08-03$421.02$515.0213,300
2011-08-02$425.39$520.3634,300
2011-08-01$424.00$518.667,700
2011-07-29$421.39$515.4714,900
2011-07-28$421.12$515.146,800
2011-07-27$419.81$513.5410,700
2011-07-26$425.46$520.455,800
2011-07-25$426.28$521.458,400
2011-07-22$426.83$522.123,700
2011-07-21$431.32$527.627,900
2011-07-20$422.54$516.877,500
2011-07-19$424.30$519.037,700
2011-07-18$421.22$515.266,600
2011-07-15$416.11$509.015,500
2011-07-14$416.52$509.514,500
2011-07-13$416.35$509.3010,200
2011-07-12$416.74$509.786,100
2011-07-11$416.24$509.1715,200
2011-07-08$416.74$509.786,800
2011-07-07$419.00$512.546,100
2011-07-06$415.00$507.658,300
2011-07-05$415.80$508.6323,700
2011-07-01$430.50$526.6121,900
2011-06-30$420.16$513.9630,700
2011-06-29$423.60$518.1712,800
2011-06-28$406.88$497.723,700
2011-06-27$406.05$496.706,000
2011-06-24$403.00$492.9735,800
2011-06-23$401.74$491.4341,800
2011-06-22$398.15$487.0423,500
2011-06-21$398.51$487.4820,400
2011-06-20$396.91$485.5218,400
2011-06-17$397.31$486.0131,500
2011-06-16$404.98$495.3925,800
2011-06-15$399.90$489.1818,800
2011-06-14$402.00$491.7518,400
2011-06-13$402.66$492.5616,800
2011-06-10$403.00$492.9716,700
2011-06-09$402.36$492.1910,000
2011-06-08$402.62$492.5131,600
2011-06-07$401.93$491.6627,000
2011-06-06$394.93$483.1032,600
2011-06-03$406.00$496.6418,800
2011-06-02$405.86$496.4736,400
2011-06-01$406.24$496.9443,900
2011-05-31$409.50$500.92248,200
2011-05-27$407.20$498.1133,500
2011-05-26$402.00$491.7551,600
2011-05-25$392.00$479.5279,200
2011-05-24$394.59$482.6862,800
2011-05-23$390.54$477.7332,100
2011-05-20$392.55$480.1965,600
2011-05-19$396.00$484.4132,100
2011-05-18$395.18$483.4187,900
2011-05-17$343.63$420.3535,400
2011-05-16$347.11$424.6013,900
2011-05-13$349.01$426.9311,200
2011-05-12$349.60$427.6513,000
2011-05-11$349.03$426.9514,000
2011-05-10$353.55$432.4818,200
2011-05-09$350.46$428.709,000
2011-05-06$353.92$432.9435,300
2011-05-05$359.29$439.5037,200
2011-05-04$346.50$423.8624,000
2011-05-03$352.09$430.7021,000
2011-05-02$352.82$431.5925,000
2011-04-29$357.51$437.3312,000
2011-04-28$359.99$440.3610,900
2011-04-27$354.91$434.1547,600
2011-04-26$360.00$440.3712,700
2011-04-25$363.74$444.954,400
2011-04-21$368.34$450.579,300
2011-04-20$370.45$453.1611,100
2011-04-19$365.97$447.686,900
2011-04-18$369.97$452.578,500
2011-04-15$368.88$451.238,000
2011-04-14$371.93$454.979,300
2011-04-13$370.84$453.6318,500
2011-04-12$374.99$458.7110,500
2011-04-11$375.07$458.8112,700
2011-04-08$370.58$453.318,700
2011-04-07$370.88$453.6823,300
2011-04-06$372.87$456.1218,800
2011-04-05$368.05$450.2218,300
2011-04-04$369.97$452.577,100
2011-04-01$367.01$448.959,100
2011-03-31$364.20$445.5140,800
2011-03-30$362.00$442.8213,600
2011-03-29$364.70$446.1215,500
2011-03-28$365.21$446.757,800
2011-03-25$367.07$449.0216,300
2011-03-24$362.93$443.965,300
2011-03-23$360.33$440.7812,800
2011-03-22$360.00$440.3716,700
2011-03-21$363.65$444.8415,100
2011-03-18$363.50$444.6513,300
2011-03-17$352.50$431.2015,300
2011-03-16$351.18$428.3613,200
2011-03-15$355.00$433.0223,700
2011-03-14$363.55$443.456,900
2011-03-11$363.53$443.4223,000
2011-03-10$367.00$447.666,800
2011-03-09$372.17$453.966,700
2011-03-08$372.80$454.7314,200
2011-03-07$375.03$457.457,500
2011-03-04$373.50$455.599,700
2011-03-03$378.96$462.258,500
2011-03-02$370.57$452.0112,900
2011-03-01$375.64$458.2018,000
2011-02-28$379.75$463.2118,900
2011-02-25$378.50$461.6817,800
2011-02-24$363.60$443.5112,200
2011-02-23$363.13$442.9410,100
2011-02-22$365.60$445.9517,700
2011-02-18$370.25$451.628,100
2011-02-17$368.25$449.186,100
2011-02-16$365.67$446.0310,200
2011-02-15$363.90$443.8814,600
2011-02-14$364.50$444.6112,500
2011-02-11$366.05$446.5011,000
2011-02-10$365.00$445.2213,000
2011-02-09$363.53$443.429,300
2011-02-08$363.37$443.238,200
2011-02-07$360.23$439.4014,300
2011-02-04$350.87$427.985,800
2011-02-03$347.18$423.487,400
2011-02-02$341.50$416.5522,800
2011-02-01$343.43$418.9127,200
2011-01-31$340.00$414.728,300
2011-01-28$341.25$416.2510,900
2011-01-27$342.73$418.0510,700
2011-01-26$343.61$419.135,800
2011-01-25$342.11$417.3027,800
2011-01-24$343.15$418.5720,700
2011-01-21$342.91$418.2713,900
2011-01-20$347.99$424.4713,700
2011-01-19$340.50$415.3316,100
2011-01-18$345.35$421.2510,100
2011-01-14$347.42$423.7716,600
2011-01-13$349.04$425.7512,700
2011-01-12$352.33$429.7615,000
2011-01-11$350.24$427.218,800
2011-01-10$344.80$420.583,200
2011-01-07$345.85$421.869,900
2011-01-06$342.95$418.327,800
2011-01-05$344.84$420.6316,700
2011-01-04$344.21$419.8613,400
2011-01-03$343.76$419.3114,900