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
May 10, 1991	152,153,464
May 3, 1991	150,673,697
Apr 26, 1991	150,673,697
Apr 19, 1991	153,943,504
Apr 12, 1991	152,750,144
Apr 5, 1991	149,766,743
Mar 28, 1991	146,783,341
Mar 22, 1991	144,993,301
Mar 15, 1991	142,916,853
Mar 8, 1991	146,783,341
Mar 1, 1991	144,110,214
Feb 22, 1991	138,143,411
Feb 15, 1991	139,026,498
Feb 8, 1991	131,866,335
Feb 1, 1991	128,286,254
Jan 25, 1991	125,302,852
Jan 18, 1991	123,226,405
Jan 11, 1991	123,226,405
Jan 4, 1991	125,613,126
Dec 28, 1990	122,033,045
Dec 21, 1990	119,336,050
Dec 14, 1990	118,142,689
Dec 7, 1990	117,546,009
Nov 30, 1990	114,562,608
Nov 23, 1990	114,276,201
Nov 16, 1990	107,999,125
Nov 9, 1990	108,309,399
Nov 2, 1990	107,402,445
Oct 26, 1990	104,729,317
Oct 19, 1990	105,015,724
Oct 12, 1990	104,729,317
Oct 5, 1990	108,595,805
Sep 28, 1990	102,939,277
Sep 21, 1990	106,519,358
Sep 14, 1990	111,579,207
Sep 7, 1990	113,965,928
Aug 31, 1990	114,276,201
Aug 24, 1990	111,579,207
Aug 17, 1990	118,142,689
Aug 10, 1990	117,259,603
Aug 3, 1990	115,469,562
Jul 27, 1990	83,535,235
Jul 20, 1990	83,248,828
Jul 13, 1990	84,131,915
Jul 6, 1990	79,072,067
Jun 29, 1990	79,072,067
Jun 22, 1990	81,745,194
Jun 15, 1990	81,148,514
Jun 8, 1990	80,265,427
Jun 1, 1990	76,971,752
May 25, 1990	75,491,985
May 18, 1990	74,585,031
May 11, 1990	77,568,432
May 4, 1990	75,181,711
Apr 27, 1990	72,198,310
Apr 20, 1990	76,088,665
Apr 12, 1990	78,165,113
Apr 6, 1990	76,375,072
Mar 30, 1990	76,685,346
Mar 23, 1990	75,181,711
Mar 16, 1990	76,971,752
Mar 9, 1990	76,375,072
Mar 2, 1990	74,895,305
Feb 23, 1990	73,391,671
Feb 16, 1990	75,778,392
Feb 9, 1990	73,988,351
Feb 2, 1990	74,895,305
Jan 26, 1990	72,794,990
Jan 19, 1990	77,568,432
Jan 12, 1990	83,248,828
Jan 5, 1990	85,038,869
Dec 29, 1989	82,938,555
Dec 22, 1989	80,551,834
Dec 15, 1989	85,325,276
Dec 8, 1989	82,652,148
Dec 1, 1989	82,341,874
Nov 24, 1989	82,055,468
Nov 17, 1989	85,038,869
Nov 10, 1989	84,728,595
Nov 3, 1989	86,518,636
Oct 27, 1989	86,828,910
Oct 20, 1989	86,828,910
Oct 13, 1989	87,425,590
Oct 6, 1989	93,989,073
Sep 29, 1989	91,292,078
Sep 22, 1989	90,408,991
Sep 15, 1989	91,292,078
Sep 8, 1989	93,082,119
Sep 1, 1989	92,485,439
Aug 25, 1989	89,812,311
Aug 18, 1989	85,921,956
Aug 11, 1989	88,308,677
Aug 4, 1989	90,098,718
Jul 28, 1989	87,711,997
Jul 21, 1989	81,745,194
Jul 14, 1989	85,038,869
Jul 7, 1989	83,248,828
Jun 30, 1989	81,745,194
Jun 23, 1989	79,358,473
Jun 16, 1989	82,055,468