Common Stock, Shares, Outstanding of WHITE MOUNTAINS INSURANCE GROUP LTD from 30 Jun 2010 to 31 Dec 2025

Taxonomy & unit
us-gaap: shares
Description
Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.
Summary
WHITE MOUNTAINS INSURANCE GROUP LTD quarterly Common Stock, Shares, Outstanding in shares history and change rate from 30 Jun 2010 to 31 Dec 2025.
  • WHITE MOUNTAINS INSURANCE GROUP LTD Common Stock, Shares, Outstanding for the quarter ending 31 Dec 2025 was 2,479,677, a 3.4% decline year-over-year.
Source SEC data
View on sec.gov
Common Stock, Shares, Outstanding, Quarterly (shares)
Common Stock, Shares, Outstanding, YoY Quarterly Change (%)

WHITE MOUNTAINS INSURANCE GROUP LTD Quarterly Common Stock, Shares, Outstanding (shares)

Period Value YoY Chg Change % Date Report Filed Fiscal Year Fiscal Period
Q4 2025 2,479,677 -88,471 -3.4% 31 Dec 2025 10-K 27 Feb 2026 2025 FY
Q3 2025 2,575,161 +7,013 +0.27% 30 Sep 2025 10-Q 06 Nov 2025 2025 Q3
Q2 2025 2,575,136 +6,853 +0.27% 30 Jun 2025 10-Q 07 Aug 2025 2025 Q2
Q1 2025 2,573,726 +7,993 +0.31% 31 Mar 2025 10-Q 07 May 2025 2025 Q1
Q4 2024 2,568,148 +7,696 +0.3% 31 Dec 2024 10-K 27 Feb 2026 2025 FY
Q3 2024 2,568,148 +7,696 +0.3% 30 Sep 2024 10-Q 06 Nov 2024 2024 Q3
Q2 2024 2,568,283 +7,831 +0.31% 30 Jun 2024 10-Q 07 Aug 2024 2024 Q2
Q1 2024 2,565,733 +1,249 +0.05% 31 Mar 2024 10-Q 09 May 2024 2024 Q1
Q4 2023 2,560,452 -11,704 -0.46% 31 Dec 2023 10-K 28 Feb 2025 2024 FY
Q3 2023 2,560,452 -15,780 -0.61% 30 Sep 2023 10-Q 06 Nov 2023 2023 Q3
Q2 2023 2,560,452 -382,425 -13% 30 Jun 2023 10-Q 07 Aug 2023 2023 Q2
Q1 2023 2,564,484 -429,678 -14% 31 Mar 2023 10-Q 09 May 2023 2023 Q1
Q4 2022 2,572,156 -445,616 -15% 31 Dec 2022 10-K 26 Feb 2024 2023 FY
Q3 2022 2,576,232 -453,388 -15% 30 Sep 2022 10-Q 07 Nov 2022 2022 Q3
Q2 2022 2,942,877 -166,305 -5.3% 30 Jun 2022 10-Q 08 Aug 2022 2022 Q2
Q1 2022 2,994,162 -113,105 -3.6% 31 Mar 2022 10-Q 06 May 2022 2022 Q1
Q4 2021 3,017,772 -84,239 -2.7% 31 Dec 2021 10-K 27 Feb 2023 2022 FY
Q3 2021 3,029,620 -72,391 -2.3% 30 Sep 2021 10-Q 08 Nov 2021 2021 Q3
Q2 2021 3,109,182 30 Jun 2021 10-Q 06 Aug 2021 2021 Q2
Q1 2021 3,107,267 +5,506 +0.18% 31 Mar 2021 10-Q 10 May 2021 2021 Q1
Q4 2020 3,102,011 -83,342 -2.6% 31 Dec 2020 10-K 28 Feb 2022 2021 FY
Q3 2020 3,102,011 -83,342 -2.6% 30 Sep 2020 10-Q 06 Nov 2020 2020 Q3
Q1 2020 3,101,761 -79,438 -2.5% 31 Mar 2020 10-Q 07 Aug 2020 2019 Q2
Q4 2019 3,185,353 +12,238 +0.39% 31 Dec 2019 10-K 26 Feb 2021 2020 FY
Q3 2019 3,185,353 +4,813 +0.15% 30 Sep 2019 10-Q 06 Nov 2019 2019 Q3
Q2 2019 3,185,353 +4,995 +0.16% 30 Jun 2019 10-Q 06 Aug 2019 2019 Q2
Q1 2019 3,181,199 -572,206 -15% 31 Mar 2019 10-Q 06 May 2019 2019 Q1
Q4 2018 3,173,115 -577,056 -15% 31 Dec 2018 10-K 02 Mar 2020 2019 FY
Q3 2018 3,180,540 -569,431 -15% 30 Sep 2018 10-Q 05 Nov 2018 2018 Q3
Q2 2018 3,180,358 -1,391,267 -30% 30 Jun 2018 10-Q 07 Aug 2018 2018 Q2
Q1 2018 3,753,405 -819,387 -18% 31 Mar 2018 10-Q 02 May 2018 2018 Q1
Q4 2017 3,750,171 -813,643 -18% 31 Dec 2017 10-K 27 Feb 2019 2018 FY
Q3 2017 3,749,971 -828,727 -18% 30 Sep 2017 10-Q 08 Nov 2017 2017 Q3
Q2 2017 4,571,625 -392,296 -7.9% 30 Jun 2017 10-Q 04 Aug 2017 2017 Q2
Q1 2017 4,572,792 -842,670 -16% 31 Mar 2017 10-Q 02 May 2017 2017 Q1
Q4 2016 4,563,814 -1,059,921 -19% 31 Dec 2016 10-K 28 Feb 2018 2017 FY
Q3 2016 4,578,698 -1,166,304 -20% 30 Sep 2016 10-Q 02 Nov 2016 2016 Q3
Q2 2016 4,963,921 -996,621 -17% 30 Jun 2016 10-Q 03 Aug 2016 2016 Q2
Q1 2016 5,415,462 -576,122 -9.6% 31 Mar 2016 10-Q 02 May 2016 2016 Q1
Q4 2015 5,623,735 -362,479 -6.1% 31 Dec 2015 10-K 27 Feb 2017 2016 FY
Q3 2015 5,745,002 -283,249 -4.7% 30 Sep 2015 10-Q 02 Nov 2015 2015 Q3
Q2 2015 5,960,542 -189,973 -3.1% 30 Jun 2015 10-Q 03 Aug 2015 2015 Q2
Q1 2015 5,991,584 -182,802 -3% 31 Mar 2015 10-Q 04 May 2015 2015 Q1
Q4 2014 5,986,214 -190,525 -3.1% 31 Dec 2014 10-K 29 Feb 2016 2015 FY
Q3 2014 6,028,251 -148,488 -2.4% 30 Sep 2014 10-Q 29 Oct 2014 2014 Q3
Q2 2014 6,150,515 -25,974 -0.42% 30 Jun 2014 10-Q 29 Jul 2014 2014 Q2
Q1 2014 6,174,386 -1,824 -0.03% 31 Mar 2014 10-Q 28 Apr 2014 2014 Q1
Q4 2013 6,176,739 -114,225 -1.8% 31 Dec 2013 10-K 27 Feb 2015 2014 FY
Q3 2013 6,176,739 -406,914 -6.2% 30 Sep 2013 10-Q 28 Oct 2013 2013 Q3
Q2 2013 6,176,489 -453,829 -6.8% 30 Jun 2013 10-Q 30 Jul 2013 2013 Q2
Q1 2013 6,176,210 -462,663 -7% 31 Mar 2013 10-Q 29 Apr 2013 2013 Q1
Q4 2012 6,290,964 -1,286,891 -17% 31 Dec 2012 10-K 28 Feb 2014 2013 FY
Q3 2012 6,583,653 -1,047,064 -14% 30 Sep 2012 10-Q 30 Oct 2012 2012 Q3
Q2 2012 6,630,318 -1,328,271 -17% 30 Jun 2012 10-Q 27 Jul 2012 2012 Q2
Q1 2012 6,638,873 -1,336,579 -17% 31 Mar 2012 10-Q 27 Apr 2012 2012 Q1
Q4 2011 7,577,855 -617,070 -7.5% 31 Dec 2011 10-K 01 Mar 2013 2012 FY
Q3 2011 7,630,717 -712,333 -8.5% 30 Sep 2011 10-Q 28 Oct 2011 2011 Q3
Q2 2011 7,958,589 -573,853 -6.7% 30 Jun 2011 10-Q 29 Jul 2011 2011 Q2
Q1 2011 7,975,452 31 Mar 2011 10-Q 29 Apr 2011 2011 Q1
Q4 2010 8,194,925 31 Dec 2010 10-K 28 Feb 2012 2011 FY
Q3 2010 8,343,050 30 Sep 2010 10-Q 29 Oct 2010 2010 Q3
Q2 2010 8,532,442 30 Jun 2010 10-Q 30 Jul 2010 2010 Q2
* An asterisk sign (*) next to the value indicates that the value is likely invalid.