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

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WTM market cap history

Daily history. Dates identify market observations.

White Mountains Insurance Group, Ltd. Common Stock Market Cap — Daily history
Date	Market Cap
Jul 10, 1987	85,921,956
Jul 2, 1987	85,635,549
Jun 26, 1987	86,828,910
Jun 19, 1987	88,618,951
Jun 12, 1987	91,292,078
Jun 5, 1987	88,022,270
May 29, 1987	86,232,230
May 22, 1987	83,535,235
May 15, 1987	85,325,276
May 8, 1987	84,728,595
May 1, 1987	85,921,956
Apr 24, 1987	84,728,595
Apr 16, 1987	82,938,555
Apr 10, 1987	88,618,951
Apr 3, 1987	88,308,677
Mar 27, 1987	90,695,398
Mar 20, 1987	97,855,561
Mar 13, 1987	100,242,282
Mar 6, 1987	96,375,794
Feb 27, 1987	95,468,840
Feb 20, 1987	95,468,840
Feb 13, 1987	89,502,037
Feb 6, 1987	90,098,718
Jan 30, 1987	88,308,677
Jan 23, 1987	84,442,189
Jan 16, 1987	83,535,235
Jan 9, 1987	90,408,991
Jan 2, 1987	83,535,235
Dec 26, 1986	85,325,276
Dec 19, 1986	87,115,316
Dec 12, 1986	83,535,235
Dec 5, 1986	85,325,276
Nov 28, 1986	80,551,834
Nov 21, 1986	80,862,107
Nov 14, 1986	81,745,194
Nov 7, 1986	85,635,549
Oct 31, 1986	87,115,316
Oct 24, 1986	90,098,718
Oct 17, 1986	89,812,311
Oct 10, 1986	90,098,718
Oct 3, 1986	84,131,915
Sep 26, 1986	85,325,276
Sep 19, 1986	79,668,747
Sep 12, 1986	81,745,194
Sep 5, 1986	90,098,718
Aug 29, 1986	94,585,753
Aug 22, 1986	94,585,753
Aug 15, 1986	95,182,433
Aug 8, 1986	88,618,951
Aug 1, 1986	90,408,991
Jul 25, 1986	91,005,672
Jul 18, 1986	88,308,677
Jul 11, 1986	87,425,590
Jul 3, 1986	90,695,398
Jun 27, 1986	84,131,915
Jun 20, 1986	79,955,153
Jun 13, 1986	83,248,828
Jun 6, 1986	84,131,915
May 30, 1986	92,199,032
May 23, 1986	88,905,357
May 16, 1986	86,518,636
May 9, 1986	88,905,357
May 2, 1986	90,098,718
Apr 25, 1986	93,082,119
Apr 18, 1986	99,048,921
Apr 11, 1986	99,645,602
Apr 4, 1986	95,468,840
Mar 27, 1986	99,048,921
Mar 21, 1986	101,435,642
Mar 14, 1986	94,275,479
Mar 7, 1986	94,275,479
Feb 28, 1986	93,678,799
Feb 21, 1986	88,905,357
Feb 14, 1986	88,308,677
Feb 7, 1986	90,695,398
Jan 31, 1986	87,425,590
Jan 24, 1986	82,341,874
Jan 17, 1986	77,568,432
Jan 10, 1986	77,878,706
Jan 3, 1986	73,988,351
Dec 27, 1985	74,585,031
Dec 20, 1985	77,878,706
Dec 13, 1985	77,878,706
Dec 6, 1985	76,685,346
Nov 29, 1985	76,088,665
Nov 22, 1985	76,375,072
Nov 15, 1985	72,198,310
Nov 8, 1985	73,701,944
Nov 1, 1985	70,718,543
Oct 25, 1985	67,138,462