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 — 2008

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2008-12-31$267.11$322.8033,700
2008-12-30$260.00$314.2119,900
2008-12-29$247.98$299.6813,900
2008-12-26$243.25$293.969,800
2008-12-24$252.00$304.546,900
2008-12-23$249.00$300.9117,600
2008-12-22$253.40$306.2316,100
2008-12-19$269.00$325.0830,600
2008-12-18$260.50$314.8124,400
2008-12-17$274.10$331.2423,900
2008-12-16$272.00$328.7144,300
2008-12-15$251.00$303.3316,600
2008-12-12$258.50$312.3928,800
2008-12-11$241.00$291.2490,100
2008-12-10$250.10$302.2421,000
2008-12-09$259.86$314.0442,900
2008-12-08$260.00$314.2140,000
2008-12-05$265.00$320.2536,500
2008-12-04$250.50$302.7227,400
2008-12-03$262.00$316.6255,700
2008-12-02$256.00$309.3742,900
2008-12-01$237.05$286.4750,100
2008-11-28$270.00$326.2926,000
2008-11-26$264.55$319.7045,800
2008-11-25$264.50$319.6487,800
2008-11-24$258.00$311.7964,800
2008-11-21$211.75$255.9067,300
2008-11-20$212.50$256.8071,800
2008-11-19$243.90$294.7535,600
2008-11-18$273.42$330.4242,100
2008-11-17$280.00$338.3862,700
2008-11-14$319.00$385.5130,600
2008-11-13$348.00$420.5541,400
2008-11-12$308.00$372.2122,300
2008-11-11$321.30$388.2918,200
2008-11-10$323.00$390.3418,000
2008-11-07$335.00$404.8429,900
2008-11-06$330.00$398.8034,000
2008-11-05$347.00$419.3431,000
2008-11-04$354.00$427.8029,900
2008-11-03$345.00$416.9319,800
2008-10-31$344.50$416.3216,900
2008-10-30$331.50$400.6138,700
2008-10-29$320.05$386.7738,800
2008-10-28$312.63$377.8139,600
2008-10-27$288.00$348.0411,200
2008-10-24$304.00$367.3817,500
2008-10-23$306.00$369.8028,900
2008-10-22$303.00$366.1733,700
2008-10-21$332.15$401.4015,300
2008-10-20$340.10$411.0038,600
2008-10-17$334.00$403.6351,100
2008-10-16$317.05$383.1545,100
2008-10-15$315.00$380.6734,900
2008-10-14$357.25$431.7358,100
2008-10-13$358.00$432.6425,300
2008-10-10$297.00$358.9276,300
2008-10-09$310.00$374.6373,400
2008-10-08$347.00$419.3422,300
2008-10-07$375.25$453.4819,100
2008-10-06$391.00$472.5218,800
2008-10-03$415.10$501.6417,600
2008-10-02$415.01$501.5316,600
2008-10-01$452.00$546.2322,600
2008-09-30$469.75$567.6831,900
2008-09-29$405.00$489.4415,700
2008-09-26$462.00$558.3214,600
2008-09-25$482.00$582.4910,200
2008-09-24$480.38$580.536,000
2008-09-23$471.95$570.348,400
2008-09-22$476.00$575.2411,900
2008-09-19$510.00$616.3350,100
2008-09-18$495.00$598.2052,400
2008-09-17$458.00$553.4847,200
2008-09-16$483.00$583.7065,200
2008-09-15$463.80$560.4941,900
2008-09-12$474.26$573.1313,800
2008-09-11$464.91$561.8416,900
2008-09-10$476.25$575.5424,000
2008-09-09$468.50$566.1731,300
2008-09-08$481.50$581.8827,600
2008-09-05$476.49$575.8328,200
2008-09-04$461.13$557.2731,800
2008-09-03$476.50$575.8415,300
2008-09-02$475.00$574.0333,300
2008-08-29$472.90$571.4921,700
2008-08-28$472.50$571.0122,700
2008-08-27$466.13$563.3118,800
2008-08-26$458.96$554.6437,900
2008-08-25$451.35$545.4530,000
2008-08-22$453.00$547.4421,300
2008-08-21$445.00$537.7711,600
2008-08-20$434.00$524.4811,800
2008-08-19$436.00$526.9017,300
2008-08-18$436.50$527.5017,700
2008-08-15$448.33$541.8010,500
2008-08-14$443.90$536.4524,700
2008-08-13$426.01$514.8333,100
2008-08-12$442.55$534.8141,500
2008-08-11$445.85$538.8019,100
2008-08-08$443.43$535.8826,900
2008-08-07$417.50$504.5429,900
2008-08-06$425.00$513.6021,800
2008-08-05$429.90$519.5335,500
2008-08-04$431.50$521.4621,100
2008-08-01$441.80$533.9116,700
2008-07-31$436.50$527.509,700
2008-07-30$441.00$532.9417,900
2008-07-29$436.05$526.9630,100
2008-07-28$427.05$516.0821,800
2008-07-25$429.35$518.8615,300
2008-07-24$422.10$510.1026,900
2008-07-23$435.00$525.6925,400
2008-07-22$433.27$523.6024,000
2008-07-21$409.90$495.3632,900
2008-07-18$420.00$507.5633,000
2008-07-17$427.00$516.0228,400
2008-07-16$414.24$500.6043,700
2008-07-15$404.01$488.2415,700
2008-07-14$420.00$507.5623,800
2008-07-11$416.00$502.7321,600
2008-07-10$432.00$522.0623,400
2008-07-09$440.00$531.7331,800
2008-07-08$439.20$530.7719,000
2008-07-07$430.01$519.6615,200
2008-07-03$433.04$523.326,300
2008-07-02$431.01$520.8723,900
2008-07-01$428.30$517.5915,200
2008-06-30$429.00$518.4418,600
2008-06-27$434.80$525.4540,300
2008-06-26$431.00$520.8622,700
2008-06-25$440.00$531.7310,500
2008-06-24$435.75$526.6013,000
2008-06-23$430.60$520.3716,300
2008-06-20$440.25$532.0314,900
2008-06-19$442.00$534.156,500
2008-06-18$442.00$534.1512,300
2008-06-17$447.80$541.1614,000
2008-06-16$448.25$541.706,300
2008-06-13$447.64$540.9614,400
2008-06-12$451.17$545.237,000
2008-06-11$446.95$537.716,400
2008-06-10$460.60$554.1413,000
2008-06-09$457.00$549.8012,500
2008-06-06$460.00$553.4111,300
2008-06-05$473.68$569.8714,100
2008-06-04$466.75$561.5416,100
2008-06-03$483.50$581.6928,000
2008-06-02$463.80$557.9920,100
2008-05-30$477.00$573.87100,500
2008-05-29$484.00$582.2935,900
2008-05-28$484.99$583.4850,300
2008-05-27$479.00$576.2747,100
2008-05-23$467.96$562.9922,100
2008-05-22$477.60$574.5917,800
2008-05-21$467.00$561.8412,100
2008-05-20$472.50$568.4511,900
2008-05-19$470.22$565.716,000
2008-05-16$467.00$561.8413,500
2008-05-15$473.00$569.0510,600
2008-05-14$474.84$571.2718,500
2008-05-13$473.34$569.4610,000
2008-05-12$464.50$558.8318,600
2008-05-09$466.87$561.6814,200
2008-05-08$460.03$553.4517,600
2008-05-07$455.50$548.0019,000
2008-05-06$463.07$557.1120,400
2008-05-05$470.00$565.4421,700
2008-05-02$485.00$583.4910,000
2008-05-01$483.50$581.697,900
2008-04-30$476.10$572.7816,700
2008-04-29$477.00$573.8714,500
2008-04-28$467.53$562.479,500
2008-04-25$471.00$566.6510,100
2008-04-24$478.50$575.6718,800
2008-04-23$461.45$555.167,400
2008-04-22$466.00$560.6312,000
2008-04-21$469.00$564.2444,000
2008-04-18$475.50$572.067,400
2008-04-17$480.00$577.4813,800
2008-04-16$479.00$576.2739,600
2008-04-15$472.00$567.8510,500
2008-04-14$469.50$564.849,400
2008-04-11$476.00$572.6612,400
2008-04-10$477.00$573.878,600
2008-04-09$472.00$567.8513,700
2008-04-08$460.00$553.4118,200
2008-04-07$459.75$553.1121,800
2008-04-04$461.50$555.2220,100
2008-04-03$466.70$561.4720,700
2008-04-02$470.05$565.5136,700
2008-04-01$481.00$578.6825,600
2008-03-31$480.00$577.4826,200
2008-03-28$477.90$574.9511,600
2008-03-27$475.00$571.4616,300
2008-03-26$475.02$571.4813,700
2008-03-25$478.90$576.1523,100
2008-03-24$472.10$567.9721,100
2008-03-20$480.00$577.4813,300
2008-03-19$461.00$554.6221,800
2008-03-18$467.50$562.4429,200
2008-03-17$460.00$553.4121,000
2008-03-14$480.10$577.6016,800
2008-03-13$476.46$573.2218,900
2008-03-12$463.00$554.6243,300
2008-03-11$480.00$574.9830,900
2008-03-10$452.93$542.5541,300
2008-03-07$478.00$572.599,000
2008-03-06$478.00$572.5910,800
2008-03-05$480.25$575.288,000
2008-03-04$478.00$572.597,100
2008-03-03$482.21$577.6316,600
2008-02-29$493.40$591.039,600
2008-02-28$495.01$592.9610,400
2008-02-27$499.83$598.7414,400
2008-02-26$500.00$598.9412,200
2008-02-25$494.99$592.9415,700
2008-02-22$499.00$597.748,500
2008-02-21$497.50$595.9416,200
2008-02-20$499.99$598.9312,900
2008-02-19$486.00$582.176,700
2008-02-15$485.00$580.977,400
2008-02-14$483.00$578.579,400
2008-02-13$485.00$580.979,500
2008-02-12$482.40$577.8614,100
2008-02-11$471.00$564.2023,600
2008-02-08$470.00$563.0024,300
2008-02-07$489.63$586.528,800
2008-02-06$480.38$575.4418,200
2008-02-05$481.00$576.1817,100
2008-02-04$488.00$584.5628,100
2008-02-01$495.50$593.5510,800
2008-01-31$485.00$580.9718,800
2008-01-30$469.00$561.8016,300
2008-01-29$474.00$567.7916,700
2008-01-28$480.00$574.9817,800
2008-01-25$462.00$553.4217,500
2008-01-24$460.00$551.0217,700
2008-01-23$465.01$557.0313,500
2008-01-22$463.44$555.1414,000
2008-01-18$461.00$552.2223,200
2008-01-17$460.20$551.2615,600
2008-01-16$470.00$563.0025,100
2008-01-15$473.30$566.9621,600
2008-01-14$481.00$576.1844,800
2008-01-11$485.00$580.9719,900
2008-01-10$502.28$601.6719,900
2008-01-09$498.51$597.1519,100
2008-01-08$500.00$598.9422,900
2008-01-07$500.00$598.9411,000
2008-01-04$508.00$608.5225,100
2008-01-03$508.00$608.5226,200
2008-01-02$509.00$609.7216,400