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 — 2001

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2001-12-31$348.00$396.309,200
2001-12-28$351.00$399.714,700
2001-12-27$352.00$400.855,300
2001-12-26$354.00$403.1310,900
2001-12-24$348.10$396.413,000
2001-12-21$352.00$400.856,400
2001-12-20$343.11$390.737,600
2001-12-19$347.50$395.731,600
2001-12-18$349.50$398.0010,700
2001-12-17$349.00$397.444,400
2001-12-14$351.00$399.718,100
2001-12-13$357.00$406.5510,100
2001-12-12$354.00$403.132,700
2001-12-11$353.01$402.004,300
2001-12-10$350.01$398.594,100
2001-12-07$353.50$402.567,100
2001-12-06$357.99$407.676,100
2001-12-05$352.98$401.9712,500
2001-12-04$349.01$397.455,000
2001-12-03$337.00$383.774,000
2001-11-30$338.00$384.918,600
2001-11-29$340.75$388.045,000
2001-11-28$345.00$392.887,700
2001-11-27$339.00$386.054,300
2001-11-26$337.00$383.775,900
2001-11-23$337.50$384.34500
2001-11-21$337.00$383.776,100
2001-11-20$342.00$389.4638,400
2001-11-19$353.05$402.052,800
2001-11-16$350.00$398.572,500
2001-11-15$353.00$401.994,400
2001-11-14$359.00$408.827,500
2001-11-13$355.79$405.177,000
2001-11-12$354.00$403.135,300
2001-11-09$359.90$409.856,800
2001-11-08$369.99$421.3410,800
2001-11-07$367.50$418.5012,500
2001-11-06$368.00$419.0710,700
2001-11-05$364.00$414.5211,100
2001-11-02$354.00$403.1310,400
2001-11-01$344.01$391.751,800
2001-10-31$347.00$395.165,700
2001-10-30$343.00$390.604,800
2001-10-29$344.52$392.331,500
2001-10-26$345.00$392.882,800
2001-10-25$345.00$392.88100
2001-10-24$345.00$392.888,500
2001-10-23$347.50$395.735,600
2001-10-22$346.00$394.021,500
2001-10-19$344.00$391.7416,900
2001-10-18$343.06$390.675,700
2001-10-17$344.10$391.863,800
2001-10-16$341.00$388.331,000
2001-10-15$343.50$391.173,400
2001-10-12$337.00$383.778,900
2001-10-11$340.00$387.196,500
2001-10-10$335.50$382.062,800
2001-10-09$330.00$375.803,000
2001-10-08$332.90$379.107,700
2001-10-05$345.00$392.884,100
2001-10-04$352.00$400.854,200
2001-10-03$358.50$408.2512,800
2001-10-02$343.00$390.607,900
2001-10-01$337.50$384.342,100
2001-09-28$333.00$379.2116,500
2001-09-27$323.00$367.8311,600
2001-09-26$318.70$362.9312,500
2001-09-25$315.50$359.2914,300
2001-09-24$320.00$364.4110,200
2001-09-21$322.00$366.6919,900
2001-09-20$321.00$365.5518,500
2001-09-19$329.00$374.669,500
2001-09-18$324.75$369.8218,800
2001-09-17$322.00$366.6933,100
2001-09-10$361.51$411.684,900
2001-09-07$356.50$405.983,800
2001-09-06$352.50$401.4237,400
2001-09-05$345.00$392.885,900
2001-09-04$342.00$389.463,200
2001-08-31$338.00$384.9112,200
2001-08-30$349.00$397.445,500
2001-08-29$349.50$398.002,900
2001-08-28$349.00$397.448,600
2001-08-27$345.25$393.163,500
2001-08-24$347.05$395.215,600
2001-08-23$347.00$395.164,900
2001-08-22$340.00$387.192,000
2001-08-21$337.50$384.34900
2001-08-20$339.00$386.0511,700
2001-08-17$339.00$386.0515,300
2001-08-16$327.00$372.384,500
2001-08-15$327.00$372.389,100
2001-08-14$332.00$378.082,800
2001-08-13$333.00$379.214,300
2001-08-10$338.00$384.911,300
2001-08-09$338.00$384.91600
2001-08-08$336.50$383.204,900
2001-08-07$340.00$387.198,400
2001-08-06$348.40$396.755,600
2001-08-03$355.00$404.275,600
2001-08-02$368.50$419.645,800
2001-08-01$364.00$414.524,200
2001-07-31$360.00$409.962,300
2001-07-30$355.00$404.277,400
2001-07-27$357.00$406.552,600
2001-07-26$356.85$406.376,500
2001-07-25$356.00$405.413,400
2001-07-24$353.00$401.993,700
2001-07-23$353.66$402.742,100
2001-07-20$352.00$400.85800
2001-07-19$353.10$402.104,800
2001-07-18$350.00$398.574,200
2001-07-17$348.00$396.301,700
2001-07-16$349.00$397.447,700
2001-07-13$341.00$388.3315,900
2001-07-12$352.00$400.857,100
2001-07-11$359.08$408.913,700
2001-07-10$368.00$419.075,600
2001-07-09$372.00$423.633,600
2001-07-06$376.00$428.182,500
2001-07-05$374.00$425.904,300
2001-07-03$372.01$423.642,600
2001-07-02$374.50$426.476,900
2001-06-29$376.25$428.476,200
2001-06-28$369.50$420.7823,000
2001-06-27$380.25$433.022,200
2001-06-26$383.00$436.151,500
2001-06-25$386.00$439.573,500
2001-06-22$388.00$441.855,100
2001-06-21$391.00$445.264,200
2001-06-20$384.00$437.291,600
2001-06-19$377.00$429.323,700
2001-06-18$380.00$432.7411,500
2001-06-15$378.00$430.4614,500
2001-06-14$372.00$423.639,000
2001-06-13$370.00$421.357,000
2001-06-12$375.00$427.048,400
2001-06-11$373.75$425.6216,100
2001-06-08$369.95$421.2916,700
2001-06-07$364.00$414.5218,900
2001-06-06$353.00$401.9925,300
2001-06-05$349.50$398.006,900
2001-06-04$345.00$392.887,600
2001-06-01$350.00$398.577,500
2001-05-31$346.00$394.028,600
2001-05-30$338.50$385.482,400
2001-05-29$333.30$379.56900
2001-05-25$333.33$379.596,400
2001-05-24$329.50$375.2319,100
2001-05-23$324.00$368.975,500
2001-05-22$323.10$367.943,800
2001-05-21$324.50$369.542,300
2001-05-18$324.00$368.978,900
2001-05-17$322.95$367.779,400
2001-05-16$319.00$363.2714,200
2001-05-15$313.50$357.01300
2001-05-14$311.00$354.163,400
2001-05-11$311.00$354.167,000
2001-05-10$310.00$353.0225,700
2001-05-09$309.40$352.344,300
2001-05-08$309.00$351.883,200
2001-05-07$308.00$350.752,400
2001-05-04$309.00$351.88800
2001-05-03$309.00$351.887,500
2001-05-02$309.75$352.744,600
2001-05-01$312.00$355.309,300
2001-04-30$314.00$357.583,100
2001-04-27$310.00$353.022,000
2001-04-26$309.99$353.013,800
2001-04-25$307.10$349.723,700
2001-04-24$307.00$349.61700
2001-04-23$308.50$351.315,400
2001-04-20$304.01$346.205,600
2001-04-19$309.50$352.4512,900
2001-04-18$310.00$353.027,300
2001-04-17$304.90$347.213,300
2001-04-16$310.01$353.032,300
2001-04-12$310.00$353.025,700
2001-04-11$307.00$349.617,400
2001-04-10$316.90$360.887,500
2001-04-09$321.00$365.55800
2001-04-06$323.00$367.831,000
2001-04-05$326.00$371.247,300
2001-04-04$321.00$365.552,600
2001-04-03$329.75$375.5110,800
2001-04-02$335.00$381.494,600
2001-03-30$328.50$374.097,700
2001-03-29$320.75$365.265,100
2001-03-28$318.00$362.134,300
2001-03-27$317.00$360.993,700
2001-03-26$310.00$353.022,800
2001-03-23$310.40$353.485,400
2001-03-22$306.70$349.266,700
2001-03-21$304.50$346.768,100
2001-03-20$302.99$345.044,200
2001-03-19$303.25$345.341,700
2001-03-16$306.00$348.477,500
2001-03-15$305.10$347.448,100
2001-03-14$305.75$347.045,000
2001-03-13$310.10$351.982,500
2001-03-12$315.25$357.831,800
2001-03-09$316.50$359.253,000
2001-03-08$310.50$352.442,000
2001-03-07$311.50$353.571,100
2001-03-06$312.75$354.9910,000
2001-03-05$310.60$352.556,200
2001-03-02$314.75$357.262,200
2001-03-01$310.00$351.875,700
2001-02-28$312.00$354.147,300
2001-02-27$311.00$353.0016,000
2001-02-26$299.61$340.088,300
2001-02-23$300.00$340.521,000
2001-02-22$301.00$341.657,900
2001-02-21$303.12$344.0620,600
2001-02-20$306.99$348.452,500
2001-02-16$310.00$351.873,300
2001-02-15$310.50$352.445,100
2001-02-14$315.41$358.0110,300
2001-02-13$311.00$353.0012,600
2001-02-12$316.93$359.735,100
2001-02-09$313.00$355.272,000
2001-02-08$310.00$351.873,600
2001-02-07$309.00$350.735,500
2001-02-06$305.00$346.197,800
2001-02-05$301.99$342.7811,300
2001-02-02$298.00$338.2510,300
2001-02-01$292.75$332.293,600
2001-01-31$293.00$332.574,000
2001-01-30$290.00$329.171,800
2001-01-29$294.50$334.273,000
2001-01-26$290.88$330.1612,100
2001-01-25$293.00$332.572,400
2001-01-24$297.25$337.404,900
2001-01-23$299.75$340.231,200
2001-01-22$296.00$335.989,300
2001-01-19$290.50$329.734,500
2001-01-18$294.00$333.713,000
2001-01-17$297.88$338.116,400
2001-01-16$302.00$342.792,100
2001-01-12$301.00$341.654,800
2001-01-11$299.00$339.384,300
2001-01-10$294.00$333.716,800
2001-01-09$295.00$334.845,000
2001-01-08$292.00$331.4415,300
2001-01-05$303.00$343.9210,300
2001-01-04$309.06$350.806,900
2001-01-03$317.50$360.386,100
2001-01-02$315.75$358.3921,000