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 — 2012

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2012-12-31$515.00$631.244,900——
2012-12-28$512.26$627.883,800——
2012-12-27$512.10$627.693,200——
2012-12-26$513.00$628.793,500——
2012-12-24$513.44$629.331,000——
2012-12-21$514.65$630.817,700——
2012-12-20$522.90$640.9311,700——
2012-12-19$524.68$643.1112,100——
2012-12-18$520.02$637.4010,000——
2012-12-17$519.60$636.885,100——
2012-12-14$518.49$635.522,900——
2012-12-13$515.00$631.243,000——
2012-12-12$519.41$636.653,600——
2012-12-11$520.00$637.375,400——
2012-12-10$519.92$637.275,200——
2012-12-07$520.00$637.372,000——
2012-12-06$519.01$636.166,200——
2012-12-05$517.35$634.126,500——
2012-12-04$516.97$633.663,900——
2012-12-03$517.12$633.847,100——
2012-11-30$515.26$631.5640,700——
2012-11-29$512.06$627.643,700——
2012-11-28$511.19$626.574,700——
2012-11-27$517.87$634.763,400——
2012-11-26$514.90$631.124,300——
2012-11-23$516.69$633.311,200——
2012-11-21$514.18$630.243,400——
2012-11-20$509.50$624.502,500——
2012-11-19$508.76$623.593,200——
2012-11-16$508.66$623.474,700——
2012-11-15$513.73$629.698,100——
2012-11-14$510.80$626.096,800——
2012-11-13$510.18$625.336,300——
2012-11-12$513.40$629.281,300——
2012-11-09$517.67$634.512,200——
2012-11-08$514.75$630.945,900——
2012-11-07$508.99$623.882,600——
2012-11-06$516.50$633.081,600——
2012-11-05$511.50$626.956,400——
2012-11-02$514.00$630.028,000——
2012-11-01$514.34$630.432,400——
2012-10-31$512.70$628.426,700——
2012-10-26$512.30$627.931,600——
2012-10-25$514.00$630.024,200——
2012-10-24$514.66$630.834,000——
2012-10-23$513.01$628.802,400——
2012-10-22$512.50$628.185,500——
2012-10-19$514.11$630.156,500——
2012-10-18$519.13$636.3012,700——
2012-10-17$510.98$626.3123,100——
2012-10-16$513.26$629.1110,900——
2012-10-15$516.25$632.776,100——
2012-10-12$514.50$630.632,800——
2012-10-11$513.53$629.444,400——
2012-10-10$517.02$633.7210,500——
2012-10-09$511.94$627.494,600——
2012-10-08$523.32$641.44500——
2012-10-05$524.90$643.385,200——
2012-10-04$522.70$640.683,800——
2012-10-03$513.99$630.004,700——
2012-10-02$515.95$632.414,100——
2012-10-01$514.59$630.743,900——
2012-09-28$513.34$629.214,000——
2012-09-27$516.50$633.082,500——
2012-09-26$509.60$624.624,500——
2012-09-25$515.61$631.994,000——
2012-09-24$520.00$637.373,700——
2012-09-21$521.25$638.908,300——
2012-09-20$525.00$643.503,500——
2012-09-19$527.26$646.273,100——
2012-09-18$533.55$653.983,900——
2012-09-17$530.14$649.802,800——
2012-09-14$529.00$648.404,300——
2012-09-13$522.59$640.558,300——
2012-09-12$534.63$655.309,000——
2012-09-11$534.58$655.245,200——
2012-09-10$527.46$646.515,800——
2012-09-07$528.93$648.323,400——
2012-09-06$529.75$649.325,900——
2012-09-05$527.61$646.703,300——
2012-09-04$528.37$647.634,000——
2012-08-31$520.34$637.794,100——
2012-08-30$516.55$633.141,500——
2012-08-29$512.37$628.023,800——
2012-08-28$511.89$627.432,000——
2012-08-27$513.48$629.384,100——
2012-08-24$511.76$627.274,300——
2012-08-23$515.48$631.831,200——
2012-08-22$520.00$637.372,100——
2012-08-21$522.08$639.922,800——
2012-08-20$530.00$649.636,700——
2012-08-17$523.00$641.058,200——
2012-08-16$517.88$634.772,800——
2012-08-15$515.43$631.771,100——
2012-08-14$516.52$633.111,400——
2012-08-13$523.69$641.893,500——
2012-08-10$523.00$641.055,600——
2012-08-09$513.58$629.504,700——
2012-08-08$515.45$631.793,100——
2012-08-07$516.96$633.645,400——
2012-08-06$516.50$633.082,300——
2012-08-03$510.80$626.094,400——
2012-08-02$512.99$628.784,400——
2012-08-01$513.18$629.012,100——
2012-07-31$510.59$625.847,000——
2012-07-30$510.69$625.9614,200——
2012-07-27$527.93$647.096,600——
2012-07-26$532.94$653.234,800——
2012-07-25$525.37$643.954,500——
2012-07-24$522.48$640.418,300——
2012-07-23$530.94$650.787,400——
2012-07-20$529.00$648.402,300——
2012-07-19$534.00$654.536,900——
2012-07-18$535.00$655.7610,900——
2012-07-17$534.70$655.39800——
2012-07-16$531.03$650.896,200——
2012-07-13$534.69$655.3810,500——
2012-07-12$533.87$654.3711,500——
2012-07-11$535.05$655.828,700——
2012-07-10$522.63$640.594,500——
2012-07-09$520.85$638.412,500——
2012-07-06$521.63$639.373,100——
2012-07-05$520.55$638.045,500——
2012-07-03$523.11$641.182,900——
2012-07-02$525.04$643.555,800——
2012-06-29$521.75$639.5221,900——
2012-06-28$507.64$622.222,900——
2012-06-27$508.08$622.765,300——
2012-06-26$500.60$613.593,600——
2012-06-25$495.05$606.795,200——
2012-06-22$501.00$614.088,300——
2012-06-21$500.54$613.524,400——
2012-06-20$509.00$623.895,400——
2012-06-19$509.91$625.003,200——
2012-06-18$503.80$617.515,300——
2012-06-15$502.38$615.7710,200——
2012-06-14$501.30$614.454,900——
2012-06-13$505.92$620.1111,500——
2012-06-12$513.05$628.855,400——
2012-06-11$507.32$621.835,700——
2012-06-08$512.02$627.598,400——
2012-06-07$514.70$630.873,000——
2012-06-06$518.00$634.926,500——
2012-06-05$512.32$627.964,300——
2012-06-04$512.55$628.247,700——
2012-06-01$513.50$629.406,500——
2012-05-31$515.02$631.2721,200——
2012-05-30$517.15$633.886,900——
2012-05-29$523.96$642.224,800——
2012-05-25$521.27$638.936,100——
2012-05-24$530.00$649.638,300——
2012-05-23$519.00$636.1412,000——
2012-05-22$526.10$644.8511,000——
2012-05-21$523.42$641.5612,300——
2012-05-18$525.10$643.6211,000——
2012-05-17$533.31$653.684,500——
2012-05-16$538.98$660.636,700——
2012-05-15$538.37$659.8911,000——
2012-05-14$535.01$655.776,600——
2012-05-11$539.02$660.686,000——
2012-05-10$547.67$671.2914,400——
2012-05-09$539.55$661.3314,000——
2012-05-08$541.00$663.1121,700——
2012-05-07$529.27$648.7312,000——
2012-05-04$523.74$641.959,500——
2012-05-03$523.45$641.6011,000——
2012-05-02$523.32$641.446,200——
2012-05-01$526.13$644.884,700——
2012-04-30$523.00$641.0516,000——
2012-04-27$530.72$650.5114,700——
2012-04-26$522.67$640.645,100——
2012-04-25$518.60$635.6518,100——
2012-04-24$521.93$639.7417,300——
2012-04-23$518.00$634.9225,900——
2012-04-20$517.77$634.6413,700——
2012-04-19$519.70$637.006,400——
2012-04-18$524.55$642.9522,100——
2012-04-17$523.00$641.057,700——
2012-04-16$521.55$639.276,900——
2012-04-13$515.25$631.5510,500——
2012-04-12$515.33$631.655,600——
2012-04-11$510.94$626.2714,200——
2012-04-10$505.28$619.3310,500——
2012-04-09$510.04$625.1611,100——
2012-04-05$509.50$624.5016,600——
2012-04-04$501.06$614.1621,300——
2012-04-03$508.00$622.6626,500——
2012-04-02$511.25$626.6520,700——
2012-03-30$501.72$614.9660,300——
2012-03-29$502.50$615.929,300——
2012-03-28$510.25$625.4223,800——
2012-03-27$502.50$615.9223,700——
2012-03-26$511.63$627.116,100——
2012-03-23$505.40$619.483,200——
2012-03-22$498.50$611.026,400——
2012-03-21$499.12$610.553,400——
2012-03-20$498.71$610.0515,400——
2012-03-19$499.90$611.518,100——
2012-03-16$498.70$610.047,600——
2012-03-15$498.85$610.224,700——
2012-03-14$499.07$610.4917,100——
2012-03-13$499.80$611.3818,400——
2012-03-12$497.17$608.1712,300——
2012-03-09$498.78$610.1411,400——
2012-03-08$498.00$609.187,800——
2012-03-07$498.50$609.798,100——
2012-03-06$496.31$607.1110,600——
2012-03-05$498.20$609.435,200——
2012-03-02$496.95$607.903,800——
2012-03-01$498.63$609.954,200——
2012-02-29$496.22$607.0011,000——
2012-02-28$496.06$606.8111,100——
2012-02-27$498.32$609.574,800——
2012-02-24$498.45$609.739,000——
2012-02-23$496.15$606.9234,500——
2012-02-22$481.76$589.3210,500——
2012-02-21$483.87$591.9010,700——
2012-02-17$481.00$588.3912,500——
2012-02-16$478.57$585.419,300——
2012-02-15$470.70$575.7911,900——
2012-02-14$465.67$569.638,900——
2012-02-13$468.00$572.4813,500——
2012-02-10$467.03$571.3014,000——
2012-02-09$474.86$580.8810,000——
2012-02-08$468.10$572.618,600——
2012-02-07$472.71$578.2510,200——
2012-02-06$472.51$578.005,500——
2012-02-03$472.50$577.9918,300——
2012-02-02$458.48$560.845,300——
2012-02-01$453.38$554.608,300——
2012-01-31$451.24$551.989,300——
2012-01-30$454.64$556.146,100——
2012-01-27$457.16$559.229,100——
2012-01-26$453.75$555.059,200——
2012-01-25$446.61$546.3213,600——
2012-01-24$448.55$548.694,000——
2012-01-23$449.00$549.243,600——
2012-01-20$450.30$550.837,400——
2012-01-19$449.67$550.068,600——
2012-01-18$449.14$549.417,900——
2012-01-17$439.94$538.1617,400——
2012-01-13$453.47$554.7112,800——
2012-01-12$462.84$566.178,900——
2012-01-11$459.98$562.675,600——
2012-01-10$459.98$562.676,500——
2012-01-09$451.41$552.196,500——
2012-01-06$445.15$544.5311,000——
2012-01-05$452.74$553.827,700——
2012-01-04$452.71$553.789,100——
2012-01-03$455.84$557.6112,100——