No.2
Disclosure
2026/11/05 22:17
四半期報告書（10-Q）
WTM WHITE MOUNTAINS INSURANCE GROUP LTDUS-listed
2 posts
WHITE MOUNTAINS INSURANCE GROUP LTD (WTM) at a glance
Prices are from Yahoo! Finance and may be delayed. Always check the latest price before trading.
WHITE MOUNTAINS INSURANCE GROUP LTD (WTM) Stock Price HistoryAt an all-time high
WHITE MOUNTAINS INSURANCE GROUP LTD closed at $2,241.12 on Nov 6, 2026, +10.0% over 1 month, +17.4% over 1 year.
Price5-day MA25-day MAS&P 500Disclosures
1-Month High$2,376.30Nov 4
1-Month Low$2,031.50Oct 7
1-Week Change−1.3%vs Oct 30
1-Month Change+10.0%vs Oct 6
If you had invested $1,000 1 month ago, it would be worth $1,100 today (+10.0%).Price change only; dividends and fees are not included.
Over the same period the S&P 500 moved −5.7%, while this stock moved +10.0%.
Last 10 Trading Days
| Date | Close | Change | % Change |
|---|---|---|---|
| Nov 6 (Fri) | $2,241.12 | −53.04 | −2.31% |
| Nov 5 (Thu) | $2,294.16 | −82.14 | −3.46% |
| Nov 4 (Wed) | $2,376.30 | +89.77 | +3.93% |
| Nov 3 (Tue) | $2,286.53 | −30.89 | −1.33% |
| Nov 2 (Mon) | $2,317.42 | +47.43 | +2.09% |
| Oct 30 (Fri) | $2,269.99 | +24.53 | +1.09% |
| Oct 29 (Thu) | $2,245.46 | +36.88 | +1.67% |
| Oct 28 (Wed) | $2,208.58 | −3.62 | −0.16% |
| Oct 27 (Tue) | $2,212.20 | −15.14 | −0.68% |
| Oct 26 (Mon) | $2,227.34 | +2.10 | +0.09% |
Price5-day MA25-day MAS&P 500Disclosures
3-Month High$2,376.30Nov 4
3-Month Low$2,006.49Sep 30
1-Month Change+10.0%vs Oct 6
3-Month Change+4.7%vs Aug 6
If you had invested $1,000 3 months ago, it would be worth $1,047 today (+4.7%).Price change only; dividends and fees are not included.
Over the same period the S&P 500 moved −4.3%, while this stock moved +4.7%.
Last 10 Trading Days
| Date | Close | Change | % Change |
|---|---|---|---|
| Nov 6 (Fri) | $2,241.12 | −53.04 | −2.31% |
| Nov 5 (Thu) | $2,294.16 | −82.14 | −3.46% |
| Nov 4 (Wed) | $2,376.30 | +89.77 | +3.93% |
| Nov 3 (Tue) | $2,286.53 | −30.89 | −1.33% |
| Nov 2 (Mon) | $2,317.42 | +47.43 | +2.09% |
| Oct 30 (Fri) | $2,269.99 | +24.53 | +1.09% |
| Oct 29 (Thu) | $2,245.46 | +36.88 | +1.67% |
| Oct 28 (Wed) | $2,208.58 | −3.62 | −0.16% |
| Oct 27 (Tue) | $2,212.20 | −15.14 | −0.68% |
| Oct 26 (Mon) | $2,227.34 | +2.10 | +0.09% |
Price25-day MA75-day MAS&P 500Disclosures
6-Month High$2,376.30Nov 4
6-Month Low$1,989.54Jun 11
3-Month Change+4.7%vs Aug 6
6-Month Change+7.7%vs May 6
If you had invested $1,000 6 months ago, it would be worth $1,077 today (+7.7%).Price change only; dividends and fees are not included.
Over the same period the S&P 500 moved +0.2%, while this stock moved +7.7%.
Monthly Closes
| Month | Month-End Close | Monthly % |
|---|---|---|
| Nov 2026 | $2,241.12 | −1.3% |
| Oct 2026 | $2,269.99 | +13.1% |
| Sep 2026 | $2,006.49 | −4.5% |
| Aug 2026 | $2,102.01 | +0.2% |
| Jul 2026 | $2,097.73 | +1.2% |
| Jun 2026 | $2,073.39 | +0.4% |
| May 2026 | $2,064.82 | −7.5% |
Price25-day MA75-day MAS&P 500Disclosures
52-Week High$2,376.30Nov 4
52-Week Low$1,881.61Nov 20
Year to Date+7.8%vs Dec 31
From 52-Week High−5.7%Nov 4
If you had invested $1,000 1 year ago, it would be worth $1,174 today (+17.4%).Price change only; dividends and fees are not included.
Over the same period the S&P 500 moved +9.6%, while this stock moved +17.4%.
Monthly Closes
| Month | Month-End Close | Monthly % |
|---|---|---|
| Nov 2026 | $2,241.12 | −1.3% |
| Oct 2026 | $2,269.99 | +13.1% |
| Sep 2026 | $2,006.49 | −4.5% |
| Aug 2026 | $2,102.01 | +0.2% |
| Jul 2026 | $2,097.73 | +1.2% |
| Jun 2026 | $2,073.39 | +0.4% |
| May 2026 | $2,064.82 | −7.5% |
| Apr 2026 | $2,231.99 | +1.6% |
| Mar 2026 | $2,196.96 | −1.1% |
| Feb 2026 | $2,220.51 | +8.6% |
| Jan 2026 | $2,044.93 | −1.6% |
| Dec 2025 | $2,078.03 | +2.7% |
| Nov 2025 | $2,024.25 | ― |
Price13-week MA26-week MAS&P 500
3-Year High$2,319.41Apr 17, 2026
3-Year Low$1,437.78Dec 11, 2023
Annualized Return+14.1%
Max Drawdown−14.6%
If you had invested $1,000 3 years ago, it would be worth $1,484 today (+48.4%).Price change only; dividends and fees are not included.
Over the same period the S&P 500 moved +67.1%, while this stock moved +48.4%.
Yearly Closes
| Year | Year-End Close | Yearly % |
|---|---|---|
| 2026 (YTD) | $2,241.12 | +7.8% |
| 2025 | $2,078.03 | ― |
Price13-week MA26-week MAS&P 500
5-Year High$2,319.41Apr 17, 2026
5-Year Low$986.90Nov 29, 2021
Annualized Return+15.0%
Max Drawdown−15.0%
If you had invested $1,000 5 years ago, it would be worth $2,013 today (+101.3%).Price change only; dividends and fees are not included.
Over the same period the S&P 500 moved +57.5%, while this stock moved +101.3%.
Yearly Closes
| Year | Year-End Close | Yearly % |
|---|---|---|
| 2026 (YTD) | $2,241.12 | +7.8% |
| 2025 | $2,078.03 | ― |
Price1-year MA2-year MAS&P 500
All-Time High$2,241.12Oct 2026
All-Time Low$25.75Oct 1987
Total Change+7,158.7%vs Oct 1985
Annualized Return+11.0%
If you had invested $1,000 in Oct 1985, it would be worth $72,587 today (+7,158.7%).Price change only; dividends and fees are not included.
Over the same period the S&P 500 moved +3,548.8%, while this stock moved +7,158.7%.
Yearly Closes
| Year | Year-End Close | Yearly % |
|---|---|---|
| 2026 (YTD) | $2,241.12 | +7.8% |
| 2025 | $2,078.03 | +6.8% |
| 2024 | $1,945.06 | +29.2% |
| 2023 | $1,505.01 | +6.4% |
| 2022 | $1,414.33 | +39.5% |
| 2021 | $1,013.90 | +1.3% |
| 2020 | $1,000.66 | −10.3% |
| 2019 | $1,115.51 | +30.1% |
| 2018 | $857.69 | +0.8% |
| 2017 | $851.28 | +1.8% |
| 2016 | $836.05 | +15.0% |
| 2015 | $726.81 | +15.3% |
| 2014 | $630.11 | +4.5% |
| 2013 | $603.08 | +17.1% |
| 2012 | $515.00 | +13.6% |
| 2011 | $453.46 | +35.1% |
| 2010 | $335.60 | +0.9% |
| 2009 | $332.66 | +24.5% |
| 2008 | $267.11 | −48.0% |
| 2007 | $514.05 | −11.3% |
| 2006 | $579.43 | +3.7% |
| 2005 | $558.55 | −13.5% |
| 2004 | $646.00 | +40.5% |
| 2003 | $459.95 | +42.4% |
| 2002 | $323.00 | −7.2% |
| 2001 | $348.00 | +9.1% |
| 2000 | $319.00 | +164.7% |
| 1999 | $120.50 | −14.0% |
| 1998 | $140.06 | +15.8% |
| 1997 | $121.00 | +26.4% |
| 1996 | $95.75 | +28.5% |
| 1995 | $74.50 | +3.1% |
| 1994 | $72.25 | −8.0% |
| 1993 | $78.50 | +9.0% |
| 1992 | $72.00 | +3.0% |
| 1991 | $69.88 | +34.7% |
| 1990 | $51.88 | +49.3% |
| 1989 | $34.75 | +18.8% |
| 1988 | $29.25 | +13.6% |
| 1987 | $25.75 | −26.7% |
| 1986 | $35.13 | +13.8% |
| 1985 | $30.88 | ― |
Daily, weekly and monthly closes (Yahoo! Finance, split-adjusted, dividends excluded). "All" covers the range Yahoo provides (from Oct 1985). Please check the latest prices before trading.
Recent SEC filings (EDGAR)
- 11/05 08:13 8-K 決算発表（経営成績・財政状態）（Item 2.02）／財務諸表および添付資料（Item 9.01）
- 11/05 10-Q
- 11/05 SCHEDULE 13D/A
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No.1
Disclosure
2026/11/05 22:13
臨時報告（重要事象）（8-K）
決算発表（経営成績・財政状態）（Item 2.02）／財務諸表および添付資料（Item 9.01）
決算発表（経営成績・財政状態）（Item 2.02）／財務諸表および添付資料（Item 9.01）
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