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 — 1989

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1989-12-29$34.75$36.6419,600——
1989-12-28$35.00$36.9028,500——
1989-12-27$34.50$36.37113,700——
1989-12-26$34.25$36.1114,700——
1989-12-22$33.75$35.5896,500——
1989-12-21$33.50$35.3248,400——
1989-12-20$33.25$35.0515,400——
1989-12-19$33.88$35.71137,900——
1989-12-18$34.63$36.5089,900——
1989-12-15$35.75$37.6979,300——
1989-12-14$36.38$38.35117,000——
1989-12-13$35.75$37.6949,400——
1989-12-12$35.13$37.0394,200——
1989-12-11$34.75$36.6480,600——
1989-12-08$34.63$36.5055,700——
1989-12-07$35.38$37.2918,700——
1989-12-06$34.88$36.7764,800——
1989-12-05$34.38$36.24126,900——
1989-12-04$34.38$36.2450,100——
1989-12-01$34.50$36.37338,000——
1989-11-30$33.75$35.58209,600——
1989-11-29$34.25$36.11128,100——
1989-11-28$34.50$36.37213,800——
1989-11-27$34.38$36.24115,600——
1989-11-24$34.38$36.2450,300——
1989-11-22$34.38$36.2448,800——
1989-11-21$34.38$36.0898,200——
1989-11-20$34.75$36.4850,200——
1989-11-17$35.63$37.3974,800——
1989-11-16$35.75$37.53159,600——
1989-11-15$36.00$37.7934,100——
1989-11-14$35.75$37.5359,900——
1989-11-13$35.88$37.6620,500——
1989-11-10$35.50$37.2628,000——
1989-11-09$35.63$37.39121,900——
1989-11-08$35.88$37.66140,900——
1989-11-07$35.50$37.2699,900——
1989-11-06$36.00$37.7912,400——
1989-11-03$36.25$38.05300,400——
1989-11-02$36.25$38.05114,000——
1989-11-01$36.50$38.3128,500——
1989-10-31$36.63$38.4420,800——
1989-10-30$36.50$38.3157,700——
1989-10-27$36.38$38.1891,500——
1989-10-26$36.50$38.31164,800——
1989-10-25$36.00$37.79198,000——
1989-10-24$35.50$37.26168,900——
1989-10-23$36.00$37.79367,000——
1989-10-20$36.38$38.18188,800——
1989-10-19$36.75$38.58274,700——
1989-10-18$36.50$38.31721,000——
1989-10-17$37.00$38.84511,900——
1989-10-16$36.00$37.79576,400——
1989-10-13$36.63$38.44161,200——
1989-10-12$38.88$40.8197,100——
1989-10-11$39.25$41.2050,400——
1989-10-10$40.25$42.25125,200——
1989-10-09$40.00$41.9968,900——
1989-10-06$39.38$41.33196,400——
1989-10-05$39.00$40.94119,900——
1989-10-04$38.50$40.41103,000——
1989-10-03$38.50$40.41149,300——
1989-10-02$38.25$40.1532,700——
1989-09-29$38.25$40.15300,200——
1989-09-28$37.38$39.2349,800——
1989-09-27$37.38$39.23136,600——
1989-09-26$37.13$38.9799,400——
1989-09-25$37.38$39.2349,900——
1989-09-22$37.88$39.7672,600——
1989-09-21$38.25$40.1553,000——
1989-09-20$38.38$40.28100,600——
1989-09-19$38.75$40.6736,400——
1989-09-18$38.50$40.4133,100——
1989-09-15$38.25$40.15116,600——
1989-09-14$38.75$40.6786,100——
1989-09-13$38.75$40.6754,600——
1989-09-12$38.75$40.6764,600——
1989-09-11$38.63$40.5423,700——
1989-09-08$39.00$40.94118,900——
1989-09-07$38.38$40.2847,600——
1989-09-06$38.13$40.0299,800——
1989-09-05$38.75$40.6767,900——
1989-09-01$38.75$40.6729,300——
1989-08-31$39.00$40.9488,300——
1989-08-30$38.38$40.2880,600——
1989-08-29$37.75$39.631,970,600——
1989-08-28$37.50$39.3652,900——
1989-08-25$37.63$39.49121,300——
1989-08-24$36.63$38.44110,600——
1989-08-23$36.00$37.6342,000——
1989-08-22$35.38$36.9836,300——
1989-08-21$35.63$37.2483,300——
1989-08-18$36.00$37.6331,100——
1989-08-17$36.63$38.2839,800——
1989-08-16$36.63$38.2825,600——
1989-08-15$36.25$37.8935,500——
1989-08-14$36.75$38.4143,200——
1989-08-11$37.00$38.6867,300——
1989-08-10$38.00$39.7234,200——
1989-08-09$38.00$39.7220,200——
1989-08-08$37.75$39.4679,200——
1989-08-07$37.88$39.5923,800——
1989-08-04$37.75$39.4689,700——
1989-08-03$37.63$39.33171,400——
1989-08-02$37.25$38.9448,000——
1989-08-01$37.50$39.20119,200——
1989-07-31$38.00$39.72252,600——
1989-07-28$36.75$38.4145,400——
1989-07-27$36.88$38.55277,700——
1989-07-26$35.63$37.24315,700——
1989-07-25$35.00$36.59187,200——
1989-07-24$34.13$35.6795,600——
1989-07-21$34.25$35.80180,100——
1989-07-20$35.00$36.59199,700——
1989-07-19$35.13$36.72278,000——
1989-07-18$35.13$36.7295,800——
1989-07-17$35.25$36.85163,700——
1989-07-14$35.63$37.24110,700——
1989-07-13$34.88$36.4516,200——
1989-07-12$34.75$36.3276,800——
1989-07-11$34.75$36.32113,400——
1989-07-10$34.75$36.3238,000——
1989-07-07$34.88$36.4577,400——
1989-07-06$34.63$36.19166,200——
1989-07-05$33.88$35.4170,800——
1989-07-03$33.88$35.4129,800——
1989-06-30$34.25$35.8013,700——
1989-06-29$34.38$35.93109,200——
1989-06-28$34.50$36.06126,300——
1989-06-27$34.63$36.1919,500——
1989-06-26$34.13$35.6794,500——
1989-06-23$33.25$34.7690,000——
1989-06-22$33.38$34.8935,300——
1989-06-21$33.63$35.1512,700——
1989-06-20$33.75$35.28254,200——
1989-06-19$34.13$35.6744,800——
1989-06-16$34.38$35.93120,600——
1989-06-15$34.75$36.3232,700——
1989-06-14$35.00$36.59242,100——
1989-06-13$35.13$36.7219,400——
1989-06-12$35.25$36.858,700——
1989-06-09$35.13$36.7253,600——
1989-06-08$35.50$37.1148,900——
1989-06-07$35.38$36.9895,800——
1989-06-06$34.75$36.32237,400——
1989-06-05$35.00$36.5983,400——
1989-06-02$35.75$37.3752,600——
1989-06-01$34.75$36.3286,900——
1989-05-31$33.75$35.2849,300——
1989-05-30$33.13$34.6347,600——
1989-05-26$33.00$34.4977,300——
1989-05-25$32.88$34.3638,400——
1989-05-24$33.00$34.49168,400——
1989-05-23$32.88$34.21145,900——
1989-05-22$32.25$33.56195,200——
1989-05-19$32.63$33.9551,200——
1989-05-18$32.00$33.3093,300——
1989-05-17$31.88$33.17167,300——
1989-05-16$32.63$33.9559,300——
1989-05-15$33.25$34.6087,300——
1989-05-12$33.38$34.7355,200——
1989-05-11$33.00$34.3488,100——
1989-05-10$32.75$34.0880,600——
1989-05-09$32.38$33.69135,800——
1989-05-08$32.75$34.08100,600——
1989-05-05$33.00$34.34244,200——
1989-05-04$33.63$34.99290,000——
1989-05-03$34.25$35.6468,000——
1989-05-02$34.38$35.7783,600——
1989-05-01$34.63$36.0372,700——
1989-04-28$34.25$35.6475,000——
1989-04-27$34.50$35.9071,200——
1989-04-26$34.75$36.16106,600——
1989-04-25$33.50$34.8672,900——
1989-04-24$33.13$34.4762,800——
1989-04-21$32.88$34.2169,600——
1989-04-20$32.63$33.9568,900——
1989-04-19$32.88$34.21154,300——
1989-04-18$33.00$34.34121,500——
1989-04-17$32.75$34.0869,100——
1989-04-14$33.25$34.6096,100——
1989-04-13$32.50$33.8244,700——
1989-04-12$32.38$33.6938,100——
1989-04-11$33.25$34.6047,500——
1989-04-10$33.50$34.8632,200——
1989-04-07$33.88$35.2547,400——
1989-04-06$33.75$35.12189,200——
1989-04-05$33.88$35.2542,900——
1989-04-04$33.50$34.8639,900——
1989-04-03$33.63$34.9934,400——
1989-03-31$33.50$34.8653,400——
1989-03-30$33.38$34.739,200——
1989-03-29$33.00$34.3411,700——
1989-03-28$33.13$34.475,300——
1989-03-27$32.88$34.2127,700——
1989-03-23$32.88$34.2116,800——
1989-03-22$33.25$34.6033,100——
1989-03-21$33.13$34.47146,300——
1989-03-20$33.00$34.3444,500——
1989-03-17$33.00$34.34162,700——
1989-03-16$34.00$35.3859,900——
1989-03-15$33.63$34.9970,500——
1989-03-14$33.50$34.86192,700——
1989-03-13$33.75$35.12142,400——
1989-03-10$33.63$34.99149,200——
1989-03-09$33.88$35.2533,300——
1989-03-08$33.88$35.2528,600——
1989-03-07$33.88$35.2565,700——
1989-03-06$33.00$34.3445,500——
1989-03-03$32.88$34.2113,400——
1989-03-02$33.00$34.3489,300——
1989-03-01$32.63$33.95152,400——
1989-02-28$32.50$33.82115,700——
1989-02-27$32.63$33.95141,100——
1989-02-24$32.38$33.6945,000——
1989-02-23$32.75$34.086,800——
1989-02-22$32.63$33.7956,000——
1989-02-21$32.88$34.0538,500——
1989-02-17$33.38$34.5735,200——
1989-02-16$33.00$34.1862,500——
1989-02-15$32.75$33.9243,100——
1989-02-14$32.75$33.9275,700——
1989-02-13$31.75$32.88111,500——
1989-02-10$31.50$32.6385,600——
1989-02-09$32.50$33.6681,600——
1989-02-08$33.00$34.18102,700——
1989-02-07$32.88$34.0554,300——
1989-02-06$33.13$34.3196,000——
1989-02-03$33.13$34.3183,600——
1989-02-02$32.75$33.9286,200——
1989-02-01$32.63$33.7996,100——
1989-01-31$33.00$34.1859,100——
1989-01-30$33.13$34.3192,100——
1989-01-27$32.38$33.53257,400——
1989-01-26$31.63$32.76269,700——
1989-01-25$30.75$31.85157,600——
1989-01-24$31.13$32.2467,900——
1989-01-23$30.63$31.7282,800——
1989-01-20$30.88$31.9890,900——
1989-01-19$31.25$32.3781,300——
1989-01-18$31.13$32.2414,000——
1989-01-17$31.13$32.24240,500——
1989-01-16$30.88$31.9845,700——
1989-01-13$30.38$31.4699,500——
1989-01-12$30.00$31.0745,700——
1989-01-11$30.13$31.2090,900——
1989-01-10$30.38$31.4645,500——
1989-01-09$30.00$31.0790,200——
1989-01-06$29.50$30.5534,400——
1989-01-05$29.00$30.0442,300——
1989-01-04$29.50$30.5536,000——
1989-01-03$29.13$30.1722,300——