White Mountains Insurance Group, Ltd. Common Stock (WTM)

Market Cap

$5.31B

Current · Retrieved: Oct 25, 2026 · USD

WTM Market Cap

Current$5.31BretrievedOct 25, 2026

WTM Market Cap ($67.14M → $5.31B · CAGR +11.2%)

Latest values, visible window

High-resolution chart · PNG

WTM market cap history

Daily history. Dates identify market observations.

White Mountains Insurance Group, Ltd. Common Stock Market Cap — Daily history
Date	Market Cap
Jun 9, 1989	83,845,509
Jun 2, 1989	85,325,276
May 26, 1989	78,761,793
May 19, 1989	77,878,706
May 12, 1989	79,668,747
May 5, 1989	78,761,793
Apr 28, 1989	81,745,194
Apr 21, 1989	78,475,386
Apr 14, 1989	79,358,473
Apr 7, 1989	80,862,107
Mar 31, 1989	79,955,153
Mar 23, 1989	78,475,386
Mar 17, 1989	78,761,793
Mar 10, 1989	80,265,427
Mar 3, 1989	78,475,386
Feb 24, 1989	77,282,026
Feb 17, 1989	79,668,747
Feb 10, 1989	75,181,711
Feb 3, 1989	79,072,067
Jan 27, 1989	77,282,026
Jan 20, 1989	73,701,944
Jan 13, 1989	72,508,584
Jan 6, 1989	70,408,269
Dec 30, 1988	69,811,589
Dec 23, 1988	69,214,909
Dec 16, 1988	69,811,589
Dec 9, 1988	68,928,502
Dec 2, 1988	68,618,229
Nov 25, 1988	68,618,229
Nov 18, 1988	69,811,589
Nov 11, 1988	70,718,543
Nov 4, 1988	72,198,310
Oct 28, 1988	74,585,031
Oct 21, 1988	75,491,985
Oct 14, 1988	76,971,752
Oct 7, 1988	79,668,747
Sep 30, 1988	77,878,706
Sep 23, 1988	78,475,386
Sep 16, 1988	79,668,747
Sep 9, 1988	78,165,113
Sep 2, 1988	77,568,432
Aug 26, 1988	75,181,711
Aug 19, 1988	75,491,985
Aug 12, 1988	74,298,625
Aug 5, 1988	75,181,711
Jul 29, 1988	73,988,351
Jul 22, 1988	74,895,305
Jul 15, 1988	75,778,392
Jul 8, 1988	77,282,026
Jul 1, 1988	77,878,706
Jun 24, 1988	77,282,026
Jun 17, 1988	70,718,543
Jun 10, 1988	68,021,548
Jun 3, 1988	67,424,868
May 27, 1988	65,945,101
May 20, 1988	62,054,746
May 13, 1988	63,248,106
May 6, 1988	66,828,188
Apr 29, 1988	68,618,229
Apr 22, 1988	65,634,827
Apr 15, 1988	66,231,508
Apr 8, 1988	68,618,229
Mar 31, 1988	67,424,868
Mar 25, 1988	64,441,467
Mar 18, 1988	70,121,863
Mar 11, 1988	69,214,909
Mar 4, 1988	67,735,142
Feb 26, 1988	67,424,868
Feb 19, 1988	69,214,909
Feb 12, 1988	64,441,467
Feb 5, 1988	65,634,827
Jan 29, 1988	66,541,781
Jan 22, 1988	66,828,188
Jan 15, 1988	66,541,781
Jan 8, 1988	63,248,106
Dec 31, 1987	61,458,066
Dec 24, 1987	62,054,746
Dec 18, 1987	60,264,705
Dec 11, 1987	57,591,578
Dec 4, 1987	58,474,664
Nov 27, 1987	63,844,787
Nov 20, 1987	67,735,142
Nov 13, 1987	68,021,548
Nov 6, 1987	72,794,990
Oct 30, 1987	78,475,386
Oct 23, 1987	77,878,706
Oct 16, 1987	86,232,230
Oct 9, 1987	90,695,398
Oct 2, 1987	87,115,316
Sep 25, 1987	85,038,869
Sep 18, 1987	83,845,509
Sep 11, 1987	84,131,915
Sep 4, 1987	86,828,910
Aug 28, 1987	89,502,037
Aug 21, 1987	92,485,439
Aug 14, 1987	93,082,119
Aug 7, 1987	85,325,276
Jul 31, 1987	83,535,235
Jul 24, 1987	83,535,235
Jul 17, 1987	84,728,595