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 — 2002

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2002-12-31$323.00$368.9415,300
2002-12-30$323.50$369.5116,400
2002-12-27$322.00$367.8010,700
2002-12-26$325.00$371.239,400
2002-12-24$331.52$378.6817,800
2002-12-23$334.50$382.0822,700
2002-12-20$320.00$365.5213,100
2002-12-19$318.00$363.2314,200
2002-12-18$315.00$359.8117,100
2002-12-17$317.00$362.092,800
2002-12-16$320.00$365.525,700
2002-12-13$316.22$361.206,100
2002-12-12$315.90$360.838,900
2002-12-11$316.50$361.5213,800
2002-12-10$316.00$360.9515,500
2002-12-09$315.40$360.263,400
2002-12-06$318.00$363.234,500
2002-12-05$319.25$364.663,200
2002-12-04$315.75$360.664,000
2002-12-03$318.00$363.235,300
2002-12-02$322.35$368.207,100
2002-11-29$323.00$368.944,200
2002-11-27$322.00$367.8010,300
2002-11-26$321.50$367.238,400
2002-11-25$320.00$365.5215,700
2002-11-22$317.00$362.0918,700
2002-11-21$316.00$360.9510,500
2002-11-20$317.50$362.669,000
2002-11-19$319.51$364.968,000
2002-11-18$315.00$359.813,600
2002-11-15$315.50$360.386,000
2002-11-14$312.50$356.956,000
2002-11-13$310.75$354.959,100
2002-11-12$309.50$353.527,500
2002-11-11$313.00$357.52200
2002-11-08$313.50$358.091,200
2002-11-07$314.00$358.665,700
2002-11-06$315.00$359.8112,600
2002-11-05$316.95$362.033,600
2002-11-04$318.50$363.8011,100
2002-11-01$323.51$369.5310,100
2002-10-31$322.01$367.816,300
2002-10-30$315.00$359.815,600
2002-10-29$321.50$367.233,300
2002-10-28$320.01$365.538,300
2002-10-25$318.51$363.815,900
2002-10-24$316.50$361.526,100
2002-10-23$325.00$371.234,100
2002-10-22$320.25$365.802,600
2002-10-21$320.00$365.526,700
2002-10-18$319.00$364.379,200
2002-10-17$323.00$368.942,900
2002-10-16$316.50$361.523,100
2002-10-15$319.25$364.664,900
2002-10-14$305.00$348.384,300
2002-10-11$313.00$357.523,100
2002-10-10$305.01$348.397,800
2002-10-09$284.50$324.976,900
2002-10-08$288.50$329.543,200
2002-10-07$289.01$330.123,800
2002-10-04$289.00$330.118,300
2002-10-03$292.50$334.1120,100
2002-10-02$294.00$335.8214,600
2002-10-01$297.00$339.254,500
2002-09-30$294.50$336.394,100
2002-09-27$298.00$340.391,500
2002-09-26$298.00$340.394,900
2002-09-25$292.50$334.115,000
2002-09-24$289.50$330.686,900
2002-09-23$294.50$336.397,300
2002-09-20$301.00$343.814,800
2002-09-19$302.50$345.534,800
2002-09-18$304.00$347.2410,100
2002-09-17$305.00$348.382,800
2002-09-16$313.56$358.165,900
2002-09-13$316.75$361.801,100
2002-09-12$308.25$352.101,500
2002-09-11$305.00$348.38800
2002-09-10$304.00$347.241,100
2002-09-09$303.02$346.1217,700
2002-09-06$304.00$347.242,900
2002-09-05$305.00$348.384,100
2002-09-04$305.50$348.952,100
2002-09-03$303.00$346.104,800
2002-08-30$311.00$355.24600
2002-08-29$314.75$359.521,200
2002-08-28$315.00$359.813,300
2002-08-27$320.00$365.524,200
2002-08-26$324.00$370.09300
2002-08-23$323.00$368.943,700
2002-08-22$321.50$367.231,000
2002-08-21$319.50$364.953,200
2002-08-20$318.50$363.802,500
2002-08-19$318.25$363.5214,200
2002-08-16$315.50$360.387,400
2002-08-15$314.00$358.662,400
2002-08-14$316.00$360.956,400
2002-08-13$317.00$362.091,100
2002-08-12$317.52$362.68800
2002-08-09$316.50$361.5210,300
2002-08-08$301.00$343.815,600
2002-08-07$301.90$344.844,600
2002-08-06$302.50$345.5317,900
2002-08-05$303.10$346.2113,600
2002-08-02$322.90$368.833,500
2002-08-01$339.00$387.224,400
2002-07-31$340.00$388.366,200
2002-07-30$325.00$371.2318,100
2002-07-29$316.50$361.529,400
2002-07-26$298.00$340.394,700
2002-07-25$289.50$330.686,100
2002-07-24$285.00$325.547,100
2002-07-23$285.00$325.546,800
2002-07-22$286.00$326.688,700
2002-07-19$288.00$328.9629,900
2002-07-18$292.50$334.1113,500
2002-07-17$301.00$343.817,000
2002-07-16$304.00$347.2411,100
2002-07-15$314.05$358.729,800
2002-07-12$315.00$359.814,200
2002-07-11$313.90$358.5514,500
2002-07-10$318.00$363.235,900
2002-07-09$323.25$369.234,800
2002-07-08$322.50$368.372,000
2002-07-05$321.75$367.522,600
2002-07-03$322.00$367.804,400
2002-07-02$320.50$366.093,400
2002-07-01$322.00$367.809,100
2002-06-28$316.50$361.529,300
2002-06-27$321.75$367.529,800
2002-06-26$326.00$372.376,600
2002-06-25$327.00$373.516,400
2002-06-24$337.00$384.938,600
2002-06-21$341.00$389.502,500
2002-06-20$340.00$388.365,800
2002-06-19$340.00$388.363,700
2002-06-18$344.90$393.963,900
2002-06-17$333.50$380.943,200
2002-06-14$330.00$376.943,500
2002-06-13$337.00$384.934,700
2002-06-12$339.75$388.0815,400
2002-06-11$343.05$391.855,000
2002-06-10$346.00$395.211,800
2002-06-07$337.75$385.792,400
2002-06-06$334.50$382.083,200
2002-06-05$337.00$384.932,700
2002-06-04$339.75$388.0817,700
2002-06-03$342.50$391.224,500
2002-05-31$355.00$405.494,100
2002-05-30$352.51$402.659,800
2002-05-29$353.01$403.222,600
2002-05-28$356.00$406.6412,100
2002-05-24$358.70$409.724,400
2002-05-23$363.01$414.641,600
2002-05-22$364.00$415.7810,800
2002-05-21$364.75$416.635,200
2002-05-20$373.00$426.063,600
2002-05-17$376.50$430.054,100
2002-05-16$378.00$431.776,600
2002-05-15$372.00$424.912,400
2002-05-14$370.26$422.93800
2002-05-13$367.00$419.20600
2002-05-10$365.50$417.491,500
2002-05-09$368.00$420.342,000
2002-05-08$369.75$422.341,300
2002-05-07$367.00$419.203,000
2002-05-06$370.00$422.632,300
2002-05-03$369.01$421.50600
2002-05-02$370.00$422.633,300
2002-05-01$370.00$422.635,500
2002-04-30$358.50$409.492,600
2002-04-29$355.50$406.072,600
2002-04-26$353.64$403.942,800
2002-04-25$351.00$400.931,900
2002-04-24$350.00$399.7814,900
2002-04-23$361.00$412.357,300
2002-04-22$363.00$414.632,400
2002-04-19$361.21$412.59500
2002-04-18$360.50$411.788,000
2002-04-17$361.15$412.5212,100
2002-04-16$358.50$409.4912,900
2002-04-15$359.00$410.066,600
2002-04-12$362.00$413.492,700
2002-04-11$353.00$403.217,100
2002-04-10$356.50$407.216,400
2002-04-09$356.50$407.219,000
2002-04-08$352.00$402.07500
2002-04-05$353.00$403.211,200
2002-04-04$350.50$400.356,000
2002-04-03$344.00$392.932,800
2002-04-02$343.50$392.364,500
2002-04-01$341.00$389.501,700
2002-03-28$345.40$394.538,000
2002-03-27$341.50$390.071,500
2002-03-26$334.00$381.514,900
2002-03-25$336.00$383.799,000
2002-03-22$347.50$396.931,400
2002-03-21$350.00$399.782,000
2002-03-20$347.00$396.366,300
2002-03-19$350.01$399.801,000
2002-03-18$352.98$403.197,600
2002-03-15$352.00$402.0713,800
2002-03-14$335.00$382.655,100
2002-03-13$330.50$376.3710,800
2002-03-12$330.50$376.372,100
2002-03-11$328.50$374.098,800
2002-03-08$330.00$375.804,400
2002-03-07$330.02$375.826,500
2002-03-06$329.00$374.6620,900
2002-03-05$326.50$371.818,100
2002-03-04$326.50$371.816,500
2002-03-01$330.00$375.8025,100
2002-02-28$328.00$373.526,400
2002-02-27$330.80$376.715,100
2002-02-26$329.00$374.661,300
2002-02-25$329.00$374.668,000
2002-02-22$330.50$376.3710,800
2002-02-21$331.10$377.053,800
2002-02-20$333.50$379.789,300
2002-02-19$332.00$378.082,700
2002-02-15$332.00$378.086,100
2002-02-14$337.00$383.7721,300
2002-02-13$330.25$376.0810,200
2002-02-12$330.00$375.805,800
2002-02-11$329.95$375.749,400
2002-02-08$326.90$372.2715,700
2002-02-07$330.00$375.804,900
2002-02-06$330.00$375.809,100
2002-02-05$337.00$383.773,000
2002-02-04$335.50$382.065,100
2002-02-01$336.00$382.635,600
2002-01-31$333.50$379.789,800
2002-01-30$332.00$378.085,100
2002-01-29$332.00$378.08300
2002-01-28$334.00$380.356,400
2002-01-25$332.98$379.1917,000
2002-01-24$330.00$375.804,700
2002-01-23$332.75$378.938,200
2002-01-22$333.00$379.212,000
2002-01-18$333.00$379.216,200
2002-01-17$336.50$383.207,500
2002-01-16$334.00$380.354,500
2002-01-15$335.00$381.4923,700
2002-01-14$340.00$387.196,000
2002-01-11$334.50$380.9212,700
2002-01-10$337.00$383.7713,200
2002-01-09$338.50$385.489,700
2002-01-08$340.00$387.192,500
2002-01-07$340.00$387.196,500
2002-01-04$340.00$387.1917,200
2002-01-03$346.90$395.0413,000
2002-01-02$350.00$398.577,000