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.

View year

Historical Stock Price — 1991

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1991-12-31$69.88$75.8329,400
1991-12-30$70.13$76.1056,800
1991-12-27$68.38$74.2043,500
1991-12-26$68.50$74.3437,100
1991-12-24$67.25$72.9851,600
1991-12-23$66.50$72.1723,600
1991-12-20$66.63$72.3150,900
1991-12-19$66.00$71.636,600
1991-12-18$66.25$71.9015,600
1991-12-17$66.00$71.6313,800
1991-12-16$65.38$70.9522,800
1991-12-13$65.75$71.3615,700
1991-12-12$66.13$71.7610,800
1991-12-11$65.25$70.8191,300
1991-12-10$65.63$71.2211,300
1991-12-09$65.50$71.0836,700
1991-12-06$65.88$71.49386,600
1991-12-05$65.88$71.4912,400
1991-12-04$65.88$71.497,800
1991-12-03$66.13$71.7623,900
1991-12-02$66.50$72.1713,800
1991-11-29$66.75$72.4417,200
1991-11-27$67.00$72.718,300
1991-11-26$67.00$72.7113,900
1991-11-25$67.00$72.7115,800
1991-11-22$67.00$72.7112,600
1991-11-21$66.75$72.447,400
1991-11-20$67.00$72.536,200
1991-11-19$66.63$72.1211,800
1991-11-18$67.00$72.536,500
1991-11-15$66.75$72.2627,500
1991-11-14$67.25$72.80127,600
1991-11-13$67.50$73.0710,500
1991-11-12$67.00$72.5340,100
1991-11-11$66.75$72.2610,900
1991-11-08$66.50$71.9935,000
1991-11-07$66.13$71.5818,300
1991-11-06$65.88$71.319,300
1991-11-05$65.75$71.177,000
1991-11-04$66.00$71.457,300
1991-11-01$65.75$71.1731,300
1991-10-31$65.88$71.3112,000
1991-10-30$65.75$71.1711,000
1991-10-29$65.63$71.0419,700
1991-10-28$65.50$70.9035,800
1991-10-25$65.50$70.9019,900
1991-10-24$65.88$71.312,800
1991-10-23$66.25$71.729,500
1991-10-22$67.00$72.537,000
1991-10-21$66.88$72.3943,500
1991-10-18$65.63$71.0417,900
1991-10-17$65.25$70.6313,800
1991-10-16$65.50$70.9019,700
1991-10-15$65.75$71.1756,700
1991-10-14$65.88$71.312,700
1991-10-11$65.63$71.0420,700
1991-10-10$65.25$70.632,300
1991-10-09$65.38$70.7736,600
1991-10-08$65.25$70.6322,400
1991-10-07$64.75$70.0931,800
1991-10-04$65.25$70.6322,500
1991-10-03$65.63$71.046,500
1991-10-02$65.88$71.3143,600
1991-10-01$65.25$70.6325,800
1991-09-30$65.38$70.7713,600
1991-09-27$65.38$70.7724,400
1991-09-26$65.50$70.9043,500
1991-09-25$64.75$70.0920,000
1991-09-24$64.38$69.6919,800
1991-09-23$64.25$69.554,600
1991-09-20$64.25$69.5514,900
1991-09-19$64.13$69.4217,000
1991-09-18$63.88$69.1417,300
1991-09-17$63.63$68.8741,000
1991-09-16$63.75$69.0116,500
1991-09-13$63.88$69.1422,400
1991-09-12$63.63$68.8722,300
1991-09-11$63.75$69.012,900
1991-09-10$64.00$69.2818,300
1991-09-09$63.75$69.0182,800
1991-09-06$63.75$69.0110,800
1991-09-05$64.00$69.28569,600
1991-09-04$64.00$69.2810,700
1991-09-03$64.00$69.2823,000
1991-08-30$64.00$69.2814,400
1991-08-29$63.88$69.1422,200
1991-08-28$64.00$69.2816,400
1991-08-27$64.13$69.429,600
1991-08-26$64.00$69.286,800
1991-08-23$63.75$69.011,500
1991-08-22$63.88$69.144,000
1991-08-21$64.13$69.2325,800
1991-08-20$63.25$68.2910,300
1991-08-19$62.75$67.7526,600
1991-08-16$64.00$69.1017,100
1991-08-15$64.25$69.371,000
1991-08-14$64.38$69.5012,100
1991-08-13$64.13$69.236,200
1991-08-12$64.25$69.376,900
1991-08-09$64.13$69.2329,900
1991-08-08$64.00$69.1037,300
1991-08-07$64.25$69.3719,800
1991-08-06$64.38$69.5019,500
1991-08-05$64.50$69.646,800
1991-08-02$64.50$69.644,300
1991-08-01$64.13$69.236,400
1991-07-31$64.63$69.779,700
1991-07-30$64.13$69.2337,100
1991-07-29$63.75$68.8310,100
1991-07-26$63.75$68.833,200
1991-07-25$63.88$68.9613,500
1991-07-24$63.75$68.8313,300
1991-07-23$63.75$68.8336,400
1991-07-22$63.50$68.5625,000
1991-07-19$63.13$68.15330,200
1991-07-18$62.25$67.2181,900
1991-07-17$62.13$67.0724,100
1991-07-16$62.13$67.0711,700
1991-07-15$62.00$66.9412,600
1991-07-12$62.13$67.0713,100
1991-07-11$62.13$67.072,500
1991-07-10$62.13$67.0722,300
1991-07-09$62.13$67.0715,500
1991-07-08$62.38$67.3425,100
1991-07-05$63.00$68.025,600
1991-07-03$62.75$67.7533,800
1991-07-02$63.00$68.029,500
1991-07-01$63.13$68.1514,200
1991-06-28$62.75$67.7523,800
1991-06-27$63.00$68.026,000
1991-06-26$63.00$68.0216,600
1991-06-25$63.00$68.0225,000
1991-06-24$63.00$68.02653,100
1991-06-21$63.50$68.5629,200
1991-06-20$63.13$68.1513,100
1991-06-19$63.25$68.2910,400
1991-06-18$63.75$68.838,100
1991-06-17$63.75$68.8318,500
1991-06-14$63.50$68.5623,600
1991-06-13$63.13$68.1510,900
1991-06-12$63.25$68.29103,600
1991-06-11$63.63$68.6914,600
1991-06-10$63.63$68.6975,800
1991-06-07$63.50$68.5671,400
1991-06-06$64.38$69.50128,200
1991-06-05$64.88$70.0457,200
1991-06-04$64.50$69.6430,000
1991-06-03$64.25$69.37100,900
1991-05-31$64.25$69.3759,100
1991-05-30$63.75$68.8396,200
1991-05-29$64.00$69.1017,600
1991-05-28$63.88$68.9614,100
1991-05-24$64.00$69.1066,000
1991-05-23$64.13$69.2314,900
1991-05-22$63.75$68.8310,800
1991-05-21$63.88$68.7839,600
1991-05-20$64.13$69.0525,900
1991-05-17$63.75$68.6421,100
1991-05-16$64.50$69.4581,600
1991-05-15$62.13$66.8938,800
1991-05-14$62.63$67.4316,600
1991-05-13$63.13$67.9725,100
1991-05-10$63.75$68.645,900
1991-05-09$64.25$69.1864,300
1991-05-08$63.00$67.844,600
1991-05-07$62.88$67.7079,900
1991-05-06$62.88$67.7078,100
1991-05-03$63.13$67.97167,200
1991-05-02$63.63$68.5178,100
1991-05-01$63.50$68.3774,900
1991-04-30$63.25$68.1035,500
1991-04-29$63.00$67.8459,800
1991-04-26$63.13$67.9741,600
1991-04-25$63.25$68.10348,300
1991-04-24$63.75$68.6413,200
1991-04-23$63.75$68.6414,900
1991-04-22$64.00$68.9115,300
1991-04-19$64.50$69.4522,100
1991-04-18$65.13$70.1222,300
1991-04-17$65.13$70.1259,200
1991-04-16$64.88$69.8587,100
1991-04-15$64.13$69.05120,100
1991-04-12$64.00$68.9128,900
1991-04-11$63.00$67.8469,100
1991-04-10$62.13$66.8954,700
1991-04-09$63.00$67.842,710,500
1991-04-08$63.00$67.842,266,100
1991-04-05$62.75$67.5712,300
1991-04-04$62.75$67.5764,000
1991-04-03$61.50$66.2235,500
1991-04-02$61.63$66.3623,200
1991-04-01$61.13$65.8261,400
1991-03-28$61.50$66.2213,600
1991-03-27$61.13$65.8210,000
1991-03-26$61.00$65.686,200
1991-03-25$61.13$65.825,900
1991-03-22$60.75$65.4178,400
1991-03-21$61.13$65.8236,500
1991-03-20$61.13$65.8251,100
1991-03-19$60.00$64.6129,600
1991-03-18$60.00$64.6128,600
1991-03-15$59.88$64.4744,800
1991-03-14$60.38$65.0199,900
1991-03-13$61.00$65.6847,900
1991-03-12$60.88$65.5555,800
1991-03-11$61.13$65.82131,100
1991-03-08$61.50$66.22110,800
1991-03-07$61.13$65.82452,400
1991-03-06$61.38$66.0942,200
1991-03-05$60.88$65.5536,000
1991-03-04$60.50$65.1415,500
1991-03-01$60.38$65.0133,100
1991-02-28$61.00$65.68124,600
1991-02-27$58.63$63.1225,200
1991-02-26$57.75$62.1819,300
1991-02-25$57.88$62.3219,600
1991-02-22$57.88$62.3245,900
1991-02-21$57.38$61.7886,300
1991-02-20$57.75$62.00105,600
1991-02-19$58.00$62.27106,900
1991-02-15$58.25$62.5490,200
1991-02-14$57.88$62.1360,700
1991-02-13$58.25$62.5468,500
1991-02-12$57.50$61.73226,300
1991-02-11$55.75$59.85286,900
1991-02-08$55.25$59.32171,900
1991-02-07$55.13$59.18176,600
1991-02-06$54.75$58.78172,800
1991-02-05$53.63$57.57552,100
1991-02-04$54.00$57.97125,400
1991-02-01$53.75$57.71137,500
1991-01-31$53.50$57.4451,500
1991-01-30$53.25$57.17153,200
1991-01-29$53.00$56.90103,100
1991-01-28$53.00$56.90176,200
1991-01-25$52.50$56.36137,300
1991-01-24$52.13$55.96389,900
1991-01-23$52.00$55.83837,800
1991-01-22$51.25$55.02131,700
1991-01-21$51.63$55.42100,300
1991-01-18$51.63$55.42114,000
1991-01-17$51.38$55.16121,100
1991-01-16$51.13$54.8937,500
1991-01-15$51.25$55.02162,800
1991-01-14$50.50$54.22140,700
1991-01-11$51.63$55.4284,000
1991-01-10$51.00$54.7581,500
1991-01-09$50.50$54.22175,400
1991-01-08$51.50$55.29142,800
1991-01-07$52.13$55.96224,900
1991-01-04$52.63$56.50391,800
1991-01-03$52.00$55.83182,300
1991-01-02$52.50$56.36161,900