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 — 1990

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1990-12-31$51.88$55.6937,600
1990-12-28$51.13$54.8970,600
1990-12-27$51.13$54.8930,000
1990-12-26$50.63$54.3546,000
1990-12-24$50.25$53.951,000
1990-12-21$50.00$53.68144,000
1990-12-20$50.25$53.95120,500
1990-12-19$50.25$53.95123,000
1990-12-18$50.25$53.9583,700
1990-12-17$49.63$53.2853,600
1990-12-14$49.50$53.1455,100
1990-12-13$49.75$53.4150,800
1990-12-12$49.63$53.2844,300
1990-12-11$49.75$53.4196,200
1990-12-10$49.00$52.6132,200
1990-12-07$49.25$52.8783,400
1990-12-06$49.13$52.74101,900
1990-12-05$49.00$52.61152,400
1990-12-04$48.63$52.20139,100
1990-12-03$49.00$52.61242,200
1990-11-30$48.00$51.5376,000
1990-11-29$48.00$51.5332,200
1990-11-28$48.63$52.2039,100
1990-11-27$48.63$52.2099,900
1990-11-26$47.75$51.2651,800
1990-11-23$47.88$51.4016,000
1990-11-21$47.13$50.59185,900
1990-11-20$45.63$48.80151,400
1990-11-19$45.50$48.67328,400
1990-11-16$45.25$48.4056,900
1990-11-15$45.75$48.9329,800
1990-11-14$45.75$48.9383,700
1990-11-13$45.50$48.6735,200
1990-11-12$45.88$49.0771,200
1990-11-09$45.38$48.5365,000
1990-11-08$45.38$48.5334,300
1990-11-07$45.75$48.9319,600
1990-11-06$45.88$49.0731,400
1990-11-05$45.75$48.9355,200
1990-11-02$45.00$48.1330,300
1990-11-01$44.25$47.3350,000
1990-10-31$43.75$46.7912,100
1990-10-30$43.63$46.6660,400
1990-10-29$43.50$46.5346,100
1990-10-26$43.88$46.9320,700
1990-10-25$45.00$48.1328,300
1990-10-24$44.63$47.7317,000
1990-10-23$44.50$47.6054,800
1990-10-22$44.38$47.4612,300
1990-10-19$44.00$47.06166,500
1990-10-18$43.25$46.26157,300
1990-10-17$43.63$46.6618,500
1990-10-16$42.75$45.72259,500
1990-10-15$44.13$47.2050,100
1990-10-12$43.88$46.9334,000
1990-10-11$43.25$46.26134,300
1990-10-10$44.50$47.6019,100
1990-10-09$44.50$47.60141,500
1990-10-08$45.25$48.4030,300
1990-10-05$45.50$48.67108,600
1990-10-04$45.63$48.8066,400
1990-10-03$45.50$48.6721,100
1990-10-02$45.13$48.27146,900
1990-10-01$45.13$48.27323,500
1990-09-28$43.13$46.13202,800
1990-09-27$42.25$45.19149,100
1990-09-26$43.25$46.26202,700
1990-09-25$44.00$47.06153,900
1990-09-24$43.50$46.5375,900
1990-09-21$44.63$47.73222,500
1990-09-20$43.50$46.53246,000
1990-09-19$44.88$48.00206,800
1990-09-18$46.63$49.8799,700
1990-09-17$46.25$49.47138,600
1990-09-14$46.75$50.0098,200
1990-09-13$47.25$50.54120,300
1990-09-12$47.63$50.9422,400
1990-09-11$47.75$51.0796,600
1990-09-10$47.75$51.0794,400
1990-09-07$47.75$51.07157,400
1990-09-06$47.63$50.94107,600
1990-09-05$47.88$51.2158,500
1990-09-04$47.50$50.8152,500
1990-08-31$47.88$51.2197,000
1990-08-30$48.00$51.34244,000
1990-08-29$47.75$51.07206,500
1990-08-28$48.00$51.34347,000
1990-08-27$48.00$51.3490,300
1990-08-24$46.75$50.00169,700
1990-08-23$45.88$49.07244,200
1990-08-22$47.88$51.02534,500
1990-08-21$48.13$51.29454,800
1990-08-20$49.38$52.6225,000
1990-08-17$49.50$52.762,345,400
1990-08-16$49.25$52.49162,200
1990-08-15$49.88$53.16201,200
1990-08-14$50.00$53.29181,700
1990-08-13$49.00$52.22234,100
1990-08-10$49.13$52.36359,100
1990-08-09$50.00$53.29406,100
1990-08-08$49.00$52.22282,400
1990-08-07$47.75$50.89346,700
1990-08-06$47.00$50.09642,300
1990-08-03$48.38$51.56961,400
1990-08-02$49.75$53.022,658,300
1990-08-01$38.13$40.63511,800
1990-07-31$36.50$38.90616,900
1990-07-30$36.38$38.7769,000
1990-07-27$35.00$37.30149,300
1990-07-26$35.25$37.5743,600
1990-07-25$35.00$37.30154,500
1990-07-24$35.25$37.57175,000
1990-07-23$34.25$36.50174,900
1990-07-20$34.88$37.17126,500
1990-07-19$34.75$37.0479,000
1990-07-18$35.00$37.30154,300
1990-07-17$35.25$37.57158,900
1990-07-16$35.88$38.24246,200
1990-07-13$35.25$37.57478,100
1990-07-12$34.38$36.6497,300
1990-07-11$34.50$36.7787,300
1990-07-10$34.88$37.17244,600
1990-07-09$33.75$35.97190,300
1990-07-06$33.13$35.3053,700
1990-07-05$33.38$35.5710,700
1990-07-03$33.50$35.7039,200
1990-07-02$34.00$36.2443,800
1990-06-29$33.13$35.3068,400
1990-06-28$32.88$35.0461,900
1990-06-27$32.75$34.9089,500
1990-06-26$33.13$35.30136,100
1990-06-25$34.00$36.2422,100
1990-06-22$34.25$36.5065,400
1990-06-21$34.38$36.6437,400
1990-06-20$34.00$36.2463,300
1990-06-19$34.00$36.24113,600
1990-06-18$33.75$35.9761,300
1990-06-15$34.00$36.2482,900
1990-06-14$33.38$35.5727,900
1990-06-13$33.88$36.1020,300
1990-06-12$33.88$36.10112,600
1990-06-11$33.88$36.1059,100
1990-06-08$33.63$35.84110,500
1990-06-07$34.38$36.6484,300
1990-06-06$35.00$37.30176,800
1990-06-05$34.00$36.24160,600
1990-06-04$33.50$35.70327,800
1990-06-01$32.25$34.37215,400
1990-05-31$31.88$33.97164,600
1990-05-30$31.63$33.7146,600
1990-05-29$31.88$33.9780,600
1990-05-25$31.63$33.7196,500
1990-05-24$31.50$33.57103,100
1990-05-23$31.88$33.9760,600
1990-05-22$31.50$33.39147,900
1990-05-21$31.63$33.5253,600
1990-05-18$31.25$33.13139,900
1990-05-17$31.88$33.7981,700
1990-05-16$32.13$34.0524,500
1990-05-15$32.38$34.32208,500
1990-05-14$32.75$34.72205,100
1990-05-11$32.50$34.45155,300
1990-05-10$31.00$32.8699,900
1990-05-09$31.75$33.66114,400
1990-05-08$31.75$33.66116,700
1990-05-07$31.38$33.26192,700
1990-05-04$31.50$33.39195,500
1990-05-03$31.00$32.86471,100
1990-05-02$30.50$32.33100,300
1990-05-01$29.75$31.5494,100
1990-04-30$29.88$31.6772,800
1990-04-27$30.25$32.0741,100
1990-04-26$30.63$32.4689,500
1990-04-25$31.13$32.9977,500
1990-04-24$31.00$32.8673,900
1990-04-23$31.50$33.39129,400
1990-04-20$31.88$33.7997,100
1990-04-19$31.75$33.667,400
1990-04-18$31.75$33.6679,700
1990-04-17$32.75$34.72159,400
1990-04-16$33.13$35.1170,800
1990-04-12$32.75$34.7253,000
1990-04-11$32.50$34.45131,200
1990-04-10$32.00$33.9282,200
1990-04-09$32.25$34.1931,200
1990-04-06$32.00$33.9299,300
1990-04-05$32.50$34.45188,000
1990-04-04$32.25$34.1970,700
1990-04-03$31.88$33.79130,100
1990-04-02$32.13$34.05113,700
1990-03-30$32.13$34.0576,400
1990-03-29$32.00$33.92108,600
1990-03-28$31.75$33.6612,800
1990-03-27$31.63$33.5255,400
1990-03-26$31.75$33.6625,000
1990-03-23$31.50$33.3987,200
1990-03-22$31.50$33.39292,400
1990-03-21$32.00$33.92135,800
1990-03-20$32.13$34.05170,600
1990-03-19$32.50$34.45376,100
1990-03-16$32.25$34.19249,000
1990-03-15$32.00$33.92161,500
1990-03-14$31.75$33.6653,600
1990-03-13$31.75$33.66246,500
1990-03-12$31.88$33.7919,500
1990-03-09$32.00$33.92446,700
1990-03-08$31.25$33.13560,800
1990-03-07$31.38$33.2638,600
1990-03-06$31.38$33.2617,300
1990-03-05$31.38$33.2671,300
1990-03-02$31.38$33.2659,900
1990-03-01$31.25$33.1363,100
1990-02-28$30.75$32.60399,700
1990-02-27$30.75$32.609,400
1990-02-26$30.75$32.6031,200
1990-02-23$30.75$32.60138,400
1990-02-22$31.00$32.8650,500
1990-02-21$31.25$32.95260,200
1990-02-20$31.38$33.08184,200
1990-02-16$31.75$33.47128,100
1990-02-15$31.38$33.08815,100
1990-02-14$30.75$32.4261,900
1990-02-13$30.63$32.2944,000
1990-02-12$30.63$32.2946,600
1990-02-09$31.00$32.6846,200
1990-02-08$31.13$32.81299,900
1990-02-07$31.00$32.68273,200
1990-02-06$31.00$32.68154,100
1990-02-05$31.50$33.2140,200
1990-02-02$31.38$33.08116,600
1990-02-01$30.88$32.5587,700
1990-01-31$31.13$32.8132,200
1990-01-30$30.50$32.1690,000
1990-01-29$30.88$32.5521,600
1990-01-26$30.50$32.16205,300
1990-01-25$31.25$32.9542,400
1990-01-24$32.00$33.7415,100
1990-01-23$32.38$34.13133,000
1990-01-22$32.25$34.0049,300
1990-01-19$32.50$34.2615,500
1990-01-18$32.25$34.0021,300
1990-01-17$32.50$34.26179,000
1990-01-16$33.63$35.4559,200
1990-01-15$34.00$35.8595,300
1990-01-12$34.88$36.77140,300
1990-01-11$35.75$37.6948,600
1990-01-10$36.25$38.22100,800
1990-01-09$37.00$39.0163,800
1990-01-08$36.00$37.9547,500
1990-01-05$35.63$37.5639,600
1990-01-04$36.00$37.9574,300
1990-01-03$35.75$37.6989,400
1990-01-02$35.25$37.1620,100