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 — 2006

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2006-12-29$579.43$684.009,200
2006-12-28$572.00$675.235,200
2006-12-27$579.01$683.517,300
2006-12-26$575.03$678.814,600
2006-12-22$571.68$674.869,800
2006-12-21$578.00$682.328,900
2006-12-20$584.00$689.4010,600
2006-12-19$581.59$686.555,400
2006-12-18$583.01$688.2314,000
2006-12-15$587.00$692.944,000
2006-12-14$592.00$698.845,100
2006-12-13$586.76$690.305,200
2006-12-12$595.00$699.999,100
2006-12-11$593.03$697.674,600
2006-12-08$594.90$699.875,800
2006-12-07$594.90$699.8710,700
2006-12-06$597.00$702.3412,600
2006-12-05$599.90$705.7514,500
2006-12-04$595.50$700.5814,200
2006-12-01$602.25$708.5226,400
2006-11-30$599.75$705.5823,400
2006-11-29$597.00$702.3411,500
2006-11-28$584.90$688.118,200
2006-11-27$590.00$694.117,200
2006-11-24$592.00$696.461,100
2006-11-22$594.91$699.884,600
2006-11-21$598.50$704.113,300
2006-11-20$599.00$704.707,800
2006-11-17$601.98$708.2029,100
2006-11-16$571.54$672.394,500
2006-11-15$575.51$677.0612,700
2006-11-14$574.10$675.409,500
2006-11-13$579.50$681.765,300
2006-11-10$575.00$676.465,500
2006-11-09$566.29$666.2120,600
2006-11-08$577.00$678.819,600
2006-11-07$575.50$677.0514,300
2006-11-06$573.90$675.1711,400
2006-11-03$574.75$676.1711,800
2006-11-02$576.00$677.6415,100
2006-11-01$563.00$662.3413,500
2006-10-31$567.75$667.939,500
2006-10-30$572.00$672.9323,600
2006-10-27$570.46$671.1216,400
2006-10-26$575.00$676.4632,300
2006-10-25$574.00$675.2813,400
2006-10-24$577.00$678.8145,000
2006-10-23$547.50$644.1135,300
2006-10-20$536.50$631.1718,200
2006-10-19$534.00$628.2331,900
2006-10-18$528.00$621.1714,800
2006-10-17$522.64$614.8612,800
2006-10-16$523.50$615.875,800
2006-10-13$524.50$617.055,200
2006-10-12$523.90$616.3420,300
2006-10-11$517.00$608.238,700
2006-10-10$519.00$610.5826,300
2006-10-09$511.00$601.175,900
2006-10-06$510.75$600.8714,300
2006-10-05$510.25$600.2911,800
2006-10-04$505.75$594.9910,400
2006-10-03$502.00$590.5814,500
2006-10-02$497.67$585.4913,200
2006-09-29$496.96$584.6520,600
2006-09-28$498.75$586.7613,600
2006-09-27$498.75$586.7628,600
2006-09-26$507.50$597.0511,400
2006-09-25$507.68$597.2635,800
2006-09-22$508.75$598.5212,600
2006-09-21$516.16$607.247,800
2006-09-20$520.00$611.7610,100
2006-09-19$520.00$611.7616,100
2006-09-18$518.00$609.407,700
2006-09-15$529.99$623.5110,800
2006-09-14$514.15$604.8717,000
2006-09-13$520.26$609.719,100
2006-09-12$525.00$615.2610,800
2006-09-11$525.00$615.2613,700
2006-09-08$523.00$612.927,600
2006-09-07$528.00$618.788,800
2006-09-06$523.00$612.9220,800
2006-09-05$530.00$621.125,800
2006-09-01$534.25$626.108,100
2006-08-31$529.00$619.9518,700
2006-08-30$529.75$620.837,800
2006-08-29$527.00$617.6119,800
2006-08-28$517.75$606.775,100
2006-08-25$517.50$606.476,000
2006-08-24$521.51$611.1713,200
2006-08-23$523.99$614.0812,900
2006-08-22$517.01$605.9013,400
2006-08-21$518.00$607.0612,200
2006-08-18$511.75$599.749,600
2006-08-17$503.00$589.4810,500
2006-08-16$498.00$583.629,200
2006-08-15$491.00$575.4223,100
2006-08-14$483.00$566.0412,200
2006-08-11$490.00$574.2582,600
2006-08-10$488.00$571.90131,400
2006-08-09$487.22$570.9948,100
2006-08-08$481.01$563.7120,400
2006-08-07$482.26$565.1816,500
2006-08-04$493.50$578.3512,100
2006-08-03$476.00$557.845,600
2006-08-02$478.86$561.1912,300
2006-08-01$486.56$570.2218,500
2006-07-31$490.50$574.8328,900
2006-07-28$472.00$553.1528,700
2006-07-27$457.00$535.579,000
2006-07-26$453.00$530.8910,000
2006-07-25$454.51$532.656,900
2006-07-24$463.50$543.193,300
2006-07-21$458.99$537.904,100
2006-07-20$458.46$537.2814,800
2006-07-19$456.00$534.4026,200
2006-07-18$450.30$527.7229,000
2006-07-17$458.18$536.9624,700
2006-07-14$470.00$550.817,000
2006-07-13$465.00$544.953,600
2006-07-12$473.50$554.915,600
2006-07-11$474.40$555.9612,400
2006-07-10$476.00$557.8415,600
2006-07-07$476.50$558.438,700
2006-07-06$479.50$561.9415,600
2006-07-05$490.00$574.2511,400
2006-07-03$487.97$571.873,600
2006-06-30$487.00$570.7327,800
2006-06-29$485.25$568.688,100
2006-06-28$490.47$574.8013,700
2006-06-27$492.98$577.7416,600
2006-06-26$487.00$570.7312,400
2006-06-23$485.75$569.2726,800
2006-06-22$474.75$556.3738,100
2006-06-21$468.75$549.3431,600
2006-06-20$476.40$558.3144,200
2006-06-19$478.00$560.1827,800
2006-06-16$489.00$573.0743,900
2006-06-15$516.50$605.308,800
2006-06-14$492.50$574.8346,000
2006-06-13$499.50$583.0021,700
2006-06-12$507.00$591.768,100
2006-06-09$522.00$609.265,400
2006-06-08$519.50$606.3515,900
2006-06-07$512.00$597.5914,600
2006-06-06$510.50$595.8413,800
2006-06-05$529.00$617.4310,200
2006-06-02$530.75$619.488,800
2006-06-01$535.20$624.676,300
2006-05-31$532.56$621.5912,200
2006-05-30$537.00$626.7717,100
2006-05-26$527.00$615.1014,100
2006-05-25$511.58$597.107,100
2006-05-24$505.10$589.543,300
2006-05-23$515.50$601.6811,400
2006-05-22$510.00$595.266,300
2006-05-19$512.00$597.5924,300
2006-05-18$506.00$590.598,200
2006-05-17$520.00$606.9332,900
2006-05-16$530.00$618.6025,700
2006-05-15$530.00$618.607,900
2006-05-12$529.99$618.598,500
2006-05-11$523.69$611.2424,800
2006-05-10$530.50$619.196,300
2006-05-09$529.00$617.4330,200
2006-05-08$518.50$605.1816,100
2006-05-05$526.50$614.5213,200
2006-05-04$521.50$608.6810,500
2006-05-03$522.90$610.3111,700
2006-05-02$527.50$615.687,000
2006-05-01$536.00$625.6012,300
2006-04-28$521.50$608.6817,800
2006-04-27$501.00$584.7567,300
2006-04-26$517.00$603.4326,400
2006-04-25$525.00$612.7712,200
2006-04-24$525.00$612.7710,700
2006-04-21$526.50$614.527,200
2006-04-20$530.00$618.6016,900
2006-04-19$540.00$630.2731,400
2006-04-18$528.00$616.2717,800
2006-04-17$534.75$624.1510,300
2006-04-13$536.00$625.6015,400
2006-04-12$547.00$638.4413,200
2006-04-11$553.20$645.6810,700
2006-04-10$567.00$661.7911,100
2006-04-07$575.00$671.126,400
2006-04-06$576.65$673.056,300
2006-04-05$578.44$675.145,900
2006-04-04$578.00$674.6313,100
2006-04-03$581.50$678.7113,600
2006-03-31$594.50$693.8819,200
2006-03-30$559.00$652.4512,300
2006-03-29$546.47$637.825,600
2006-03-28$548.86$640.617,000
2006-03-27$556.40$649.413,200
2006-03-24$560.50$654.205,500
2006-03-23$563.75$657.999,000
2006-03-22$574.00$669.9616,500
2006-03-21$579.31$676.156,900
2006-03-20$579.00$675.798,200
2006-03-17$571.00$666.466,800
2006-03-16$574.00$669.964,500
2006-03-15$574.00$669.9615,600
2006-03-14$569.00$664.1214,000
2006-03-13$559.01$652.469,300
2006-03-10$559.01$652.466,400
2006-03-09$555.00$647.7811,200
2006-03-08$542.00$630.277,500
2006-03-07$548.26$637.559,300
2006-03-06$551.50$641.328,600
2006-03-03$538.50$626.2010,300
2006-03-02$542.26$630.5814,700
2006-03-01$555.01$645.4018,600
2006-02-28$552.01$641.9117,000
2006-02-27$549.00$638.4116,600
2006-02-24$549.95$639.529,300
2006-02-23$552.00$641.9022,800
2006-02-22$541.94$630.205,900
2006-02-21$535.00$622.137,600
2006-02-17$537.01$624.475,800
2006-02-16$545.00$633.7622,200
2006-02-15$545.00$633.7618,400
2006-02-14$543.00$631.4423,200
2006-02-13$534.00$620.976,400
2006-02-10$533.03$619.8410,800
2006-02-09$542.00$630.2720,200
2006-02-08$530.25$616.619,400
2006-02-07$526.01$611.6818,900
2006-02-06$527.26$613.1315,900
2006-02-03$539.50$627.378,100
2006-02-02$545.97$634.899,400
2006-02-01$538.00$625.6212,800
2006-01-31$531.00$617.4832,300
2006-01-30$548.00$637.2542,900
2006-01-27$525.19$610.7351,700
2006-01-26$519.45$604.0530,400
2006-01-25$518.15$602.5429,300
2006-01-24$535.99$623.2817,600
2006-01-23$539.02$626.8122,900
2006-01-20$546.60$635.627,600
2006-01-19$551.28$641.069,200
2006-01-18$554.00$644.2316,800
2006-01-17$565.30$657.3715,700
2006-01-13$566.50$658.7626,000
2006-01-12$557.00$647.7249,800
2006-01-11$558.75$649.7545,800
2006-01-10$553.75$643.9438,500
2006-01-09$553.70$643.8883,600
2006-01-06$562.50$654.1127,600
2006-01-05$568.00$660.5122,500
2006-01-04$569.00$661.6739,700
2006-01-03$555.10$645.5136,100