White Mountains Insurance Group, Ltd. (WTM) NYSE

Currency In USD

WTM Historical Return

If you invested $1000 in White Mountains Insurance Group, Ltd. (WTM) 10 years ago, it would be worth $2,587.08 as of August 23, 2026, based on a reinvested dividends scenario. Over the same period, a $1000 investment made 5 years ago would be worth $1,873.72, while $1000 invested 1 year ago would be worth $1,155.29. This corresponds to total returns of 158.71%, 87.37%, 15.53%, respectively, with annualized returns of 9.97%, 13.37%, 15.53%.

Custom investment amounts or purchase dates can also be explored using the Stoculator calculator. Past performance does not guarantee future results.

WTM Historical Data

Date Range:

Date	Open	Close	Adj Close	High	Low	Volume
August 21, 2026	2,101.86	2,110.95	2,110.95	2,140.3	2,101.86	28,886
August 20, 2026	2,123.9	2,117.7	2,117.7	2,131.84	2,095.01	21,207
August 19, 2026	2,130.79	2,129.2	2,129.2	2,150.84	2,107.66	20,037
August 18, 2026	2,125.49	2,145.46	2,145.46	2,157.7	2,090	22,584
August 17, 2026	2,130.23	2,113.4	2,113.4	2,145.48	2,107.78	17,006
August 14, 2026	2,137.82	2,137.12	2,137.12	2,145	2,121.09	14,309
August 13, 2026	2,115.01	2,141.42	2,141.42	2,141.76	2,096.72	28,680
August 12, 2026	2,134.01	2,119.46	2,119.46	2,152.19	2,094.04	27,107
August 11, 2026	2,112.16	2,112.01	2,112.01	2,126.99	2,093.63	21,080
August 10, 2026	2,148.61	2,109.68	2,109.68	2,172.18	2,107.87	27,210
August 07, 2026	2,132	2,149.44	2,149.44	2,168.31	2,112.6	30,152
August 06, 2026	2,137.73	2,141.09	2,141.09	2,151.2	2,112.92	28,924
August 05, 2026	2,136.5	2,111.91	2,111.91	2,136.5	2,095.43	19,313
August 04, 2026	2,098.3	2,117.86	2,117.86	2,127.88	2,070	23,711
August 03, 2026	2,119.19	2,101.47	2,101.47	2,136	2,086.77	19,945
July 31, 2026	2,105.57	2,097.73	2,097.73	2,129.32	2,084.99	12,684
July 30, 2026	2,151.3	2,118.61	2,118.61	2,151.3	2,087.2	13,781
July 29, 2026	2,186.21	2,150.34	2,150.34	2,211	2,125.64	21,155
July 28, 2026	2,175.6	2,202.61	2,202.61	2,218.61	2,171.3	17,249
July 27, 2026	2,201.75	2,193.94	2,193.94	2,231	2,182.58	18,596
July 24, 2026	2,178.36	2,208.05	2,208.05	2,233.66	2,158.61	11,795
July 23, 2026	2,176.75	2,176.85	2,176.85	2,208	2,146.51	11,350
July 22, 2026	2,192	2,182.32	2,182.32	2,211.04	2,161.29	16,141
July 21, 2026	2,201.51	2,193.26	2,193.26	2,222.5	2,167.98	13,536
July 20, 2026	2,214.5	2,211.22	2,211.22	2,249.05	2,209.73	16,079
July 17, 2026	2,198.24	2,211.52	2,211.52	2,239.95	2,198.24	12,572
July 16, 2026	2,126.1	2,196.48	2,196.48	2,203.64	2,126.1	21,218
July 15, 2026	2,162.6	2,139.73	2,139.73	2,173.75	2,125.84	15,267
July 14, 2026	2,162.51	2,167.79	2,167.79	2,187.93	2,146.35	21,213
July 13, 2026	2,192.7	2,174.96	2,174.96	2,203.36	2,157.5	15,968
July 10, 2026	2,197.99	2,181.19	2,181.19	2,199.15	2,165.09	18,516
July 09, 2026	2,167.02	2,185.23	2,185.23	2,189.82	2,159.73	25,904
July 08, 2026	2,164.98	2,167.25	2,167.25	2,179.59	2,147.5	18,390
July 07, 2026	2,176	2,165.85	2,165.85	2,198.87	2,161.9	14,273
July 06, 2026	2,165.26	2,166.27	2,166.27	2,182.9	2,145.32	14,649
July 02, 2026	2,090	2,173.81	2,173.81	2,186.81	2,068.59	25,519
July 01, 2026	2,077.5	2,064.04	2,064.04	2,101.1	2,050	17,589
June 30, 2026	2,075.6	2,073.39	2,073.39	2,098.5	2,057.34	16,678
June 29, 2026	2,085.79	2,090.94	2,090.94	2,104.79	2,064.64	13,245
June 26, 2026	2,023.79	2,096.56	2,096.56	2,096.56	2,023.79	25,873
June 25, 2026	2,021.78	2,019.7	2,019.7	2,048.66	2,009.02	14,352
June 24, 2026	2,026.75	2,022.41	2,022.41	2,044.04	2,006.15	13,491
June 23, 2026	2,015.36	2,023.63	2,023.63	2,028.34	2,001.99	16,052
June 22, 2026	2,023.03	2,010.75	2,010.75	2,035	1,999.84	13,169
June 18, 2026	1,997.36	2,013.36	2,013.36	2,019.89	1,990.78	25,485
June 17, 2026	2,021.6	2,003.49	2,003.49	2,045.5	1,990	21,196
June 16, 2026	2,037.76	2,032.37	2,032.37	2,051.66	2,010	20,369
June 15, 2026	2,026.1	2,030.64	2,030.64	2,059.62	2,000.35	31,018
June 12, 2026	1,995.5	2,024.05	2,024.05	2,030	1,991.3	17,746
June 11, 2026	2,021.1	1,989.54	1,989.54	2,041.42	1,987	17,043
June 10, 2026	2,014.35	2,018.89	2,018.89	2,037.79	2,006.15	23,503
June 09, 2026	2,029.5	2,004.76	2,004.76	2,050	1,991.29	26,468
June 08, 2026	2,060	2,023.7	2,023.7	2,070	2,020.03	28,818
June 05, 2026	2,016.8	2,065.14	2,065.14	2,084.71	2,016.8	22,318
June 04, 2026	2,035	2,015.54	2,015.54	2,065	2,010.54	29,875
June 03, 2026	2,050.81	2,034.02	2,034.02	2,066.05	2,018.29	39,988
June 02, 2026	2,060.03	2,050.81	2,050.81	2,087.91	2,050.62	23,501
June 01, 2026	2,052.25	2,062.03	2,062.03	2,077.2	2,052.25	24,247
May 29, 2026	2,093.14	2,064.82	2,064.82	2,096.55	2,060.92	25,693
May 28, 2026	2,090.39	2,084.31	2,084.31	2,106.05	2,072.01	23,512