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 — 1997

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1997-12-31$121.00$132.869,900
1997-12-30$119.69$131.423,800
1997-12-29$119.63$131.35700
1997-12-26$119.00$130.672,200
1997-12-24$119.88$131.63900
1997-12-23$119.75$131.491,700
1997-12-22$120.06$131.841,200
1997-12-19$120.50$132.323,400
1997-12-18$121.50$133.411,600
1997-12-17$122.50$134.513,400
1997-12-16$122.13$134.103,200
1997-12-15$121.50$133.411,500
1997-12-12$122.00$133.960
1997-12-11$122.00$133.96300
1997-12-10$122.50$134.513,200
1997-12-09$124.00$136.163,500
1997-12-08$122.13$134.102,600
1997-12-05$122.25$134.24300
1997-12-04$122.25$134.24900
1997-12-03$122.50$134.291,900
1997-12-02$123.13$134.9811,000
1997-12-01$123.50$135.3925,400
1997-11-28$122.63$134.431,800
1997-11-26$122.75$134.573,300
1997-11-25$122.00$133.741,800
1997-11-24$120.69$132.315,900
1997-11-21$120.00$131.559,700
1997-11-20$119.31$130.8017,300
1997-11-19$119.81$131.354,900
1997-11-18$119.81$131.3510,900
1997-11-17$120.69$132.312,100
1997-11-14$120.06$131.622,500
1997-11-13$120.13$131.6910,400
1997-11-12$119.88$131.4115,300
1997-11-11$119.69$131.212,100
1997-11-10$119.75$131.283,300
1997-11-07$119.00$130.464,900
1997-11-06$120.13$131.691,900
1997-11-05$120.25$131.833,700
1997-11-04$120.25$131.833,200
1997-11-03$120.25$131.834,700
1997-10-31$119.50$131.0012,300
1997-10-30$108.13$118.538,600
1997-10-29$109.50$120.046,400
1997-10-28$107.00$117.308,300
1997-10-27$106.13$116.344,100
1997-10-24$109.00$119.491,600
1997-10-23$109.25$119.774,600
1997-10-22$110.50$121.148,800
1997-10-21$108.44$118.882,600
1997-10-20$108.25$118.672,100
1997-10-17$108.19$118.6011,500
1997-10-16$110.06$120.663,400
1997-10-15$110.56$121.213,000
1997-10-14$111.00$121.69700
1997-10-13$111.00$121.691,200
1997-10-10$110.75$121.416,300
1997-10-09$112.00$122.781,700
1997-10-08$111.75$122.51100
1997-10-07$111.75$122.51600
1997-10-06$111.00$121.692,700
1997-10-03$110.50$121.144,700
1997-10-02$109.50$120.043,400
1997-10-01$108.00$118.4012,300
1997-09-30$107.25$117.575,000
1997-09-29$107.00$117.304,600
1997-09-26$105.63$115.792,100
1997-09-25$105.00$115.1117,600
1997-09-24$107.75$118.12600
1997-09-23$107.63$117.992,900
1997-09-22$107.00$117.3015,800
1997-09-19$106.44$116.682,900
1997-09-18$106.50$116.752,300
1997-09-17$106.69$116.96800
1997-09-16$106.75$117.033,200
1997-09-15$106.13$116.345,400
1997-09-12$105.75$115.931,100
1997-09-11$105.00$115.113,500
1997-09-10$106.56$116.82600
1997-09-09$106.63$116.891,000
1997-09-08$105.88$116.073,500
1997-09-05$106.44$116.684,700
1997-09-04$106.06$116.27500
1997-09-03$106.19$116.194,300
1997-09-02$106.50$116.538,700
1997-08-29$105.50$115.4414,900
1997-08-28$105.31$115.2310,000
1997-08-27$105.06$114.967,400
1997-08-26$104.25$114.073,300
1997-08-25$104.25$114.07600
1997-08-22$104.25$114.079,800
1997-08-21$103.00$112.702,700
1997-08-20$104.00$113.801,000
1997-08-19$103.00$112.708,300
1997-08-18$102.25$111.887,100
1997-08-15$105.00$114.894,900
1997-08-14$105.50$115.44600
1997-08-13$106.00$115.99600
1997-08-12$106.75$116.812,400
1997-08-11$106.00$115.994,000
1997-08-08$105.50$115.442,900
1997-08-07$107.00$117.087,500
1997-08-06$105.00$114.891,300
1997-08-05$106.25$116.265,300
1997-08-04$106.50$116.537,100
1997-08-01$106.94$117.012,200
1997-07-31$106.25$116.265,600
1997-07-30$107.00$117.081,500
1997-07-29$105.50$115.442,300
1997-07-28$105.50$115.444,700
1997-07-25$104.00$113.802,800
1997-07-24$104.50$114.346,000
1997-07-23$104.00$113.802,700
1997-07-22$105.00$114.897,800
1997-07-21$104.25$114.078,800
1997-07-18$103.00$112.701,100
1997-07-17$102.50$112.162,500
1997-07-16$101.88$111.472,500
1997-07-15$100.88$110.389,500
1997-07-14$101.00$110.5129,200
1997-07-11$105.00$114.894,400
1997-07-10$105.00$114.893,400
1997-07-09$105.75$115.7114,600
1997-07-08$104.50$114.341,900
1997-07-07$104.50$114.343,100
1997-07-03$104.00$113.807,200
1997-07-02$105.06$114.961,700
1997-07-01$106.00$115.995,600
1997-06-30$105.00$114.896,100
1997-06-27$105.50$115.449,000
1997-06-26$105.75$115.715,800
1997-06-25$104.50$114.347,100
1997-06-24$105.94$115.925,200
1997-06-23$106.50$116.533,700
1997-06-20$106.75$116.8114,400
1997-06-19$110.50$120.913,600
1997-06-18$109.50$119.813,600
1997-06-17$108.50$118.723,400
1997-06-16$107.00$117.082,100
1997-06-13$108.00$118.171,000
1997-06-12$106.88$116.94600
1997-06-11$106.38$116.402,800
1997-06-10$105.63$115.574,700
1997-06-09$105.13$115.033,300
1997-06-06$103.13$112.843,200
1997-06-05$102.75$112.43257,300
1997-06-04$102.25$111.666,600
1997-06-03$103.38$112.891,300
1997-06-02$103.00$112.4845,500
1997-05-30$101.50$110.842,500
1997-05-29$101.25$110.571,400
1997-05-28$100.75$110.022,600
1997-05-27$99.75$108.933,300
1997-05-23$99.88$109.074,200
1997-05-22$100.00$109.213,000
1997-05-21$100.50$109.75152,400
1997-05-20$100.13$109.34800
1997-05-19$100.50$109.751,400
1997-05-16$100.75$110.021,500
1997-05-15$101.63$110.985,300
1997-05-14$101.50$110.841,800
1997-05-13$102.25$111.662,700
1997-05-12$100.50$109.751,000
1997-05-09$100.13$109.3435,100
1997-05-08$99.25$108.394,000
1997-05-07$99.88$109.073,100
1997-05-06$100.50$109.753,700
1997-05-05$101.75$111.127,300
1997-05-02$101.50$110.846,300
1997-05-01$102.75$112.214,000
1997-04-30$99.88$109.071,400
1997-04-29$101.00$110.304,600
1997-04-28$98.00$107.024,000
1997-04-25$99.25$108.394,400
1997-04-24$99.50$108.665,500
1997-04-23$100.50$109.75400
1997-04-22$100.25$109.482,400
1997-04-21$99.63$108.804,000
1997-04-18$102.00$111.393,400
1997-04-17$100.25$109.481,900
1997-04-16$100.13$109.341,500
1997-04-15$100.25$109.484,000
1997-04-14$100.00$109.212,500
1997-04-11$99.75$108.932,600
1997-04-10$101.25$110.57400
1997-04-09$101.75$111.1233,200
1997-04-08$102.00$111.391,900
1997-04-07$101.75$111.122,000
1997-04-04$101.50$110.8410,300
1997-04-03$100.75$110.021,700
1997-04-02$101.63$110.983,800
1997-04-01$102.13$111.536,800
1997-03-31$102.13$111.533,000
1997-03-27$104.00$113.576,800
1997-03-26$104.50$114.124,600
1997-03-25$106.00$115.761,900
1997-03-24$105.13$114.802,700
1997-03-21$105.00$114.676,900
1997-03-20$103.38$112.8919,900
1997-03-19$107.25$117.128,000
1997-03-18$109.00$119.032,100
1997-03-17$108.88$118.907,300
1997-03-14$109.00$119.034,400
1997-03-13$109.25$119.313,200
1997-03-12$108.75$118.761,600
1997-03-11$109.75$119.853,900
1997-03-10$108.50$118.49900
1997-03-07$107.38$117.262,300
1997-03-06$106.00$115.544,600
1997-03-05$105.88$115.4012,000
1997-03-04$107.63$117.315,000
1997-03-03$107.63$117.313,500
1997-02-28$106.50$116.081,600
1997-02-27$105.75$115.272,800
1997-02-26$104.88$114.316,500
1997-02-25$105.00$114.454,300
1997-02-24$103.25$112.542,400
1997-02-21$103.25$112.5425,400
1997-02-20$102.75$112.003,800
1997-02-19$101.75$110.917,400
1997-02-18$104.38$113.77700
1997-02-14$103.75$113.096,000
1997-02-13$102.00$111.181,000
1997-02-12$101.50$110.636,300
1997-02-11$102.38$111.591,800
1997-02-10$102.50$111.722,000
1997-02-07$102.50$111.723,000
1997-02-06$101.50$110.632,200
1997-02-05$100.50$109.541,000
1997-02-04$100.00$109.008,400
1997-02-03$100.50$109.543,900
1997-01-31$100.00$109.004,100
1997-01-30$99.88$108.86400
1997-01-29$99.75$108.73400
1997-01-28$99.25$108.181,400
1997-01-27$98.25$107.091,400
1997-01-24$97.63$106.413,400
1997-01-23$98.88$107.772,000
1997-01-22$98.00$106.822,900
1997-01-21$97.13$105.871,900
1997-01-20$96.50$105.181,500
1997-01-17$96.75$105.461,500
1997-01-16$96.63$105.325,000
1997-01-15$96.88$105.5911,400
1997-01-14$97.00$105.733,300
1997-01-13$96.50$105.181,300
1997-01-10$96.00$104.644,300
1997-01-09$97.25$106.001,700
1997-01-08$96.50$105.184,400
1997-01-07$95.38$103.966,500
1997-01-06$95.00$103.552,100
1997-01-03$96.13$104.783,900
1997-01-02$95.75$104.376,100