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 — 2004

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2004-12-31$646.00$741.753,800
2004-12-30$651.00$747.498,600
2004-12-29$659.00$756.689,100
2004-12-28$647.50$743.474,200
2004-12-27$644.50$740.037,900
2004-12-23$637.00$731.422,700
2004-12-22$639.00$733.716,200
2004-12-21$640.00$734.8610,100
2004-12-20$629.75$723.0911,300
2004-12-17$624.00$716.4911,900
2004-12-16$605.00$694.674,700
2004-12-15$598.00$686.644,500
2004-12-14$600.00$688.938,400
2004-12-13$602.60$691.928,100
2004-12-10$602.03$691.267,200
2004-12-09$604.50$694.1010,100
2004-12-08$608.72$698.956,400
2004-12-07$610.00$700.4222,500
2004-12-06$598.90$687.6722,300
2004-12-03$595.25$683.486,900
2004-12-02$607.75$697.8316,800
2004-12-01$608.75$698.9813,800
2004-11-30$617.00$708.4533,000
2004-11-29$622.75$715.066,700
2004-11-26$607.00$696.972,600
2004-11-24$599.00$687.7924,000
2004-11-23$595.00$683.1939,800
2004-11-22$602.00$691.2364,300
2004-11-19$629.00$722.2395,700
2004-11-18$558.00$640.7135,800
2004-11-17$542.10$622.4513,900
2004-11-16$539.90$619.936,000
2004-11-15$539.95$619.985,000
2004-11-12$535.00$614.303,500
2004-11-11$539.50$619.472,600
2004-11-10$539.00$618.894,600
2004-11-09$545.00$625.789,700
2004-11-08$525.50$603.391,600
2004-11-05$530.00$608.565,100
2004-11-04$527.00$605.111,300
2004-11-03$526.00$603.974,000
2004-11-02$523.50$601.094,500
2004-11-01$524.57$602.3211,200
2004-10-29$510.20$585.825,700
2004-10-28$510.30$585.9413,300
2004-10-27$510.10$585.716,500
2004-10-26$509.25$584.7310,300
2004-10-25$505.60$580.542,700
2004-10-22$501.00$575.268,100
2004-10-21$508.00$583.3011,700
2004-10-20$507.00$582.154,000
2004-10-19$502.00$576.4126,100
2004-10-18$510.20$585.8213,200
2004-10-15$508.60$583.9915,300
2004-10-14$511.00$586.7425,200
2004-10-13$518.12$594.923,500
2004-10-12$525.70$603.624,800
2004-10-11$525.50$603.396,800
2004-10-08$523.00$600.523,800
2004-10-07$520.50$597.652,900
2004-10-06$521.00$598.227,100
2004-10-05$525.00$602.821,600
2004-10-04$521.50$598.802,800
2004-10-01$525.00$602.8217,500
2004-09-30$526.00$603.9715,600
2004-09-29$525.00$602.8215,400
2004-09-28$512.00$587.892,200
2004-09-27$513.01$589.053,900
2004-09-24$513.90$590.0718,200
2004-09-23$512.00$587.8912,700
2004-09-22$510.00$585.59700
2004-09-21$510.75$586.454,100
2004-09-20$513.50$589.614,300
2004-09-17$510.00$585.593,900
2004-09-16$510.65$586.343,500
2004-09-15$507.00$582.152,200
2004-09-14$509.00$584.454,300
2004-09-13$506.50$581.573,000
2004-09-10$506.82$581.941,100
2004-09-09$508.50$583.873,100
2004-09-08$508.00$583.303,500
2004-09-07$508.50$583.871,300
2004-09-03$507.75$583.012,800
2004-09-02$506.50$581.579,200
2004-09-01$501.50$575.835,400
2004-08-31$502.93$577.481,800
2004-08-30$502.60$577.101,400
2004-08-27$501.60$575.954,200
2004-08-26$500.00$574.114,500
2004-08-25$500.49$574.677,900
2004-08-24$500.90$575.1420,500
2004-08-23$500.00$574.11109,900
2004-08-20$467.00$536.2281,300
2004-08-19$498.50$572.3916,100
2004-08-18$521.50$598.805,600
2004-08-17$514.00$590.192,400
2004-08-16$516.00$592.482,400
2004-08-13$509.00$584.452,800
2004-08-12$509.26$584.742,700
2004-08-11$505.00$579.854,800
2004-08-10$510.25$585.881,100
2004-08-09$512.00$587.895,500
2004-08-06$522.00$599.376,100
2004-08-05$526.00$603.972,400
2004-08-04$525.00$602.825,100
2004-08-03$522.25$599.664,800
2004-08-02$515.00$591.333,000
2004-07-30$505.50$580.4312,200
2004-07-29$504.01$578.7215,700
2004-07-28$505.00$579.8514,100
2004-07-27$505.50$580.433,700
2004-07-26$505.47$580.392,300
2004-07-23$505.50$580.432,500
2004-07-22$507.55$582.782,800
2004-07-21$513.12$589.184,100
2004-07-20$519.00$595.937,400
2004-07-19$512.00$587.894,100
2004-07-16$517.00$593.631,200
2004-07-15$512.00$587.894,100
2004-07-14$513.50$589.615,800
2004-07-13$514.00$590.192,000
2004-07-12$516.00$592.485,100
2004-07-09$507.50$582.726,900
2004-07-08$508.26$583.606,800
2004-07-07$521.75$599.097,200
2004-07-06$514.50$590.765,100
2004-07-02$514.00$590.192,300
2004-07-01$519.00$595.9312,000
2004-06-30$510.00$585.5913,800
2004-06-29$510.00$585.5916,000
2004-06-28$501.51$575.851,700
2004-06-25$502.00$576.415,500
2004-06-24$506.51$581.5910,000
2004-06-23$498.00$571.825,500
2004-06-22$490.00$562.6312,400
2004-06-21$493.02$566.1010,000
2004-06-18$494.50$567.8012,400
2004-06-17$500.50$574.6913,000
2004-06-16$499.10$573.0822,400
2004-06-15$502.00$576.4115,800
2004-06-14$500.51$574.7014,700
2004-06-10$501.00$575.267,400
2004-06-09$511.02$586.764,100
2004-06-08$517.00$593.6327,600
2004-06-07$518.00$594.785,600
2004-06-04$524.00$601.674,600
2004-06-03$532.75$611.721,200
2004-06-02$535.50$614.8711,100
2004-06-01$525.00$602.827,900
2004-05-28$512.50$588.467,000
2004-05-27$520.01$597.0916,000
2004-05-26$502.99$577.549,700
2004-05-25$502.00$576.414,400
2004-05-24$500.03$574.154,800
2004-05-21$506.00$581.0016,100
2004-05-20$498.75$572.6810,700
2004-05-19$487.28$559.512,800
2004-05-18$484.00$555.748,900
2004-05-17$476.10$546.674,400
2004-05-14$484.00$555.742,400
2004-05-13$486.50$558.618,600
2004-05-12$485.00$556.895,200
2004-05-11$499.50$573.548,100
2004-05-10$488.00$560.337,000
2004-05-07$506.00$581.00800
2004-05-06$506.50$581.5711,300
2004-05-05$515.00$591.33300
2004-05-04$517.10$593.755,000
2004-05-03$516.00$592.485,700
2004-04-30$515.00$591.334,000
2004-04-29$514.50$590.765,300
2004-04-28$510.00$585.594,300
2004-04-27$527.00$605.114,900
2004-04-26$515.75$592.201,900
2004-04-23$519.07$596.011,200
2004-04-22$526.00$603.974,100
2004-04-21$516.00$592.483,200
2004-04-20$530.00$608.564,700
2004-04-19$531.50$610.283,300
2004-04-16$529.75$608.275,400
2004-04-15$521.00$598.225,600
2004-04-14$526.02$603.993,000
2004-04-13$536.75$616.314,600
2004-04-12$543.50$624.062,400
2004-04-08$539.00$618.898,000
2004-04-07$536.50$616.023,400
2004-04-06$553.80$635.894,400
2004-04-05$550.74$632.377,800
2004-04-02$539.45$619.416,000
2004-04-01$535.50$614.8710,500
2004-03-31$524.50$602.2413,100
2004-03-30$510.00$585.596,900
2004-03-29$497.00$570.672,100
2004-03-26$505.00$579.8510,600
2004-03-25$492.40$565.394,800
2004-03-24$493.00$566.074,200
2004-03-23$494.99$568.367,100
2004-03-22$492.00$564.936,900
2004-03-19$493.03$566.114,300
2004-03-18$496.00$569.521,600
2004-03-17$493.97$567.195,800
2004-03-16$487.50$559.766,700
2004-03-15$478.00$548.852,500
2004-03-12$482.50$554.024,800
2004-03-11$476.00$546.553,500
2004-03-10$484.75$555.452,500
2004-03-09$482.00$552.306,300
2004-03-08$496.01$568.362,900
2004-03-05$494.00$566.056,400
2004-03-04$487.79$558.944,700
2004-03-03$482.50$552.872,400
2004-03-02$490.51$562.052,100
2004-03-01$492.25$564.054,700
2004-02-27$488.03$559.215,000
2004-02-26$475.00$544.281,500
2004-02-25$469.00$537.413,100
2004-02-24$469.00$537.411,700
2004-02-23$476.86$546.412,500
2004-02-20$472.00$540.842,400
2004-02-19$477.07$546.652,900
2004-02-18$475.00$544.281,800
2004-02-17$473.80$542.912,800
2004-02-13$471.50$540.2717,500
2004-02-12$465.00$532.8210,500
2004-02-11$460.49$527.656,700
2004-02-10$458.50$525.375,500
2004-02-09$459.50$526.523,400
2004-02-06$460.00$527.093,400
2004-02-05$461.00$528.243,600
2004-02-04$458.00$524.80700
2004-02-03$460.00$527.093,100
2004-02-02$461.70$529.049,300
2004-01-30$453.50$519.644,300
2004-01-29$455.00$521.364,200
2004-01-28$462.00$529.383,900
2004-01-27$468.51$536.844,100
2004-01-26$480.25$550.307,500
2004-01-23$464.00$531.685,200
2004-01-22$472.50$541.424,500
2004-01-21$469.00$537.413,600
2004-01-20$467.00$535.113,500
2004-01-16$461.00$528.243,200
2004-01-15$460.45$527.615,300
2004-01-14$462.00$529.386,000
2004-01-13$460.50$527.677,600
2004-01-12$464.25$531.964,500
2004-01-09$465.01$532.834,000
2004-01-08$463.00$530.533,800
2004-01-07$461.85$529.214,600
2004-01-06$460.50$527.678,800
2004-01-05$462.96$530.487,400
2004-01-02$454.00$520.222,800