Entity Common Stock, Shares Outstanding of WHITE MOUNTAINS INSURANCE GROUP LTD from 28 Jul 2010 to 23 Feb 2026

Taxonomy & unit
dei: shares
Description
Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument.
Summary
WHITE MOUNTAINS INSURANCE GROUP LTD quarterly Entity Common Stock, Shares Outstanding in shares history and change rate from 28 Jul 2010 to 23 Feb 2026.
  • WHITE MOUNTAINS INSURANCE GROUP LTD Entity Common Stock, Shares Outstanding for the quarter ending 23 Feb 2026 was 2,467,055, a 4.1% decline year-over-year.
Source SEC data
View on sec.gov
Entity Common Stock, Shares Outstanding, Quarterly (shares)
Entity Common Stock, Shares Outstanding, YoY Quarterly Change (%)

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

Period Value YoY Chg Change % Date Report Filed Fiscal Year Fiscal Period
Q1 2026 2,467,055 -106,671 -4.1% 23 Feb 2026 10-K 27 Feb 2026 2025 FY
Q3 2025 2,553,106 -15,042 -0.59% 03 Nov 2025 10-Q 06 Nov 2025 2025 Q3
Q2 2025 2,575,161 +6,878 +0.27% 01 Aug 2025 10-Q 07 Aug 2025 2025 Q2
Q1 2025 2,573,726 +7,993 +0.31% 02 May 2025 10-Q 07 May 2025 2025 Q1
Q3 2024 2,568,148 +7,696 +0.3% 01 Nov 2024 10-Q 06 Nov 2024 2024 Q3
Q2 2024 2,568,283 +7,831 +0.31% 02 Aug 2024 10-Q 07 Aug 2024 2024 Q2
Q1 2024 2,565,733 +2,349 +0.09% 06 May 2024 10-Q 09 May 2024 2024 Q1
Q3 2023 2,560,452 -15,780 -0.61% 02 Nov 2023 10-Q 06 Nov 2023 2023 Q3
Q2 2023 2,560,452 -346,542 -12% 03 Aug 2023 10-Q 07 Aug 2023 2023 Q2
Q1 2023 2,563,384 -418,320 -14% 05 May 2023 10-Q 09 May 2023 2023 Q1
Q3 2022 2,576,232 -441,540 -15% 03 Nov 2022 10-Q 07 Nov 2022 2022 Q3
Q2 2022 2,906,994 -199,136 -6.4% 04 Aug 2022 10-Q 08 Aug 2022 2022 Q2
Q1 2022 2,981,704 -114,125 -3.7% 05 May 2022 10-Q 06 May 2022 2022 Q1
Q3 2021 3,017,772 -84,239 -2.7% 05 Nov 2021 10-Q 08 Nov 2021 2021 Q3
Q2 2021 3,106,130 +4,369 +0.14% 04 Aug 2021 10-Q 06 Aug 2021 2021 Q2
Q1 2021 3,095,829 -97,680 -3.1% 24 Feb 2021 10-K/A 30 Mar 2021 2020 FY
Q3 2020 3,102,011 -83,342 -2.6% 05 Nov 2020 10-Q 06 Nov 2020 2020 Q3
Q2 2020 3,101,761 -83,592 -2.6% 05 Aug 2020 10-Q 07 Aug 2020 2019 Q2
Q1 2020 3,193,509 +12,310 +0.39% 28 Feb 2020 10-K/A 30 Mar 2020 2019 FY
Q3 2019 3,185,353 +4,813 +0.15% 05 Nov 2019 10-Q 06 Nov 2019 2019 Q3
Q2 2019 3,185,353 +4,995 +0.16% 05 Aug 2019 10-Q 06 Aug 2019 2019 Q2
Q1 2019 3,181,199 -572,206 -15% 02 May 2019 10-Q 06 May 2019 2019 Q1
Q3 2018 3,180,540 -569,431 -15% 02 Nov 2018 10-Q 05 Nov 2018 2018 Q3
Q2 2018 3,180,358 -1,156,267 -27% 06 Aug 2018 10-Q 07 Aug 2018 2018 Q2
Q1 2018 3,753,405 -819,387 -18% 01 May 2018 10-Q 02 May 2018 2018 Q1
Q3 2017 3,749,971 -815,269 -18% 07 Nov 2017 10-Q 08 Nov 2017 2017 Q3
Q2 2017 4,336,625 -594,313 -12% 02 Aug 2017 10-Q 04 Aug 2017 2017 Q2
Q1 2017 4,572,792 -491,247 -9.7% 28 Apr 2017 10-Q 02 May 2017 2017 Q1
Q3 2016 4,565,240 -1,120,925 -20% 31 Oct 2016 10-Q 02 Nov 2016 2016 Q3
Q2 2016 4,930,938 -1,029,604 -17% 31 Jul 2016 10-Q 03 Aug 2016 2016 Q2
Q1 2016 5,064,039 -927,510 -15% 02 May 2016 10-Q 02 May 2016 2016 Q1
Q3 2015 5,686,165 -318,611 -5.3% 02 Nov 2015 10-Q 02 Nov 2015 2015 Q3
Q2 2015 5,960,542 -180,159 -2.9% 03 Aug 2015 10-Q 03 Aug 2015 2015 Q2
Q1 2015 5,991,549 -182,837 -3% 27 Feb 2015 10-K 27 Feb 2015 2014 FY
Q3 2014 6,004,776 -171,963 -2.8% 29 Oct 2014 10-Q 29 Oct 2014 2014 Q3
Q2 2014 6,140,701 -35,788 -0.58% 29 Jul 2014 10-Q 29 Jul 2014 2014 Q2
Q1 2014 6,174,386 -1,824 -0.03% 28 Apr 2014 10-Q 28 Apr 2014 2014 Q1
Q3 2013 6,176,739 -406,914 -6.2% 31 Oct 2013 10-Q 28 Oct 2013 2013 Q3
Q2 2013 6,176,489 -408,229 -6.2% 30 Jul 2013 10-Q 30 Jul 2013 2013 Q2
Q1 2013 6,176,210 -462,663 -7% 29 Apr 2013 10-Q 29 Apr 2013 2013 Q1
Q3 2012 6,583,653 -1,047,064 -14% 30 Oct 2012 10-Q 30 Oct 2012 2012 Q3
Q2 2012 6,584,718 -1,373,871 -17% 26 Jul 2012 10-Q 27 Jul 2012 2012 Q2
Q1 2012 6,638,873 -1,317,284 -17% 26 Apr 2012 10-Q 27 Apr 2012 2012 Q1
Q3 2011 7,630,717 -668,230 -8.1% 28 Oct 2011 10-Q 28 Oct 2011 2011 Q3
Q2 2011 7,958,589 -505,910 -6% 29 Jul 2011 10-Q 29 Jul 2011 2011 Q2
Q1 2011 7,956,157 28 Apr 2011 10-Q 29 Apr 2011 2011 Q1
Q3 2010 8,298,947 26 Oct 2010 10-Q 29 Oct 2010 2010 Q3
Q2 2010 8,464,499 28 Jul 2010 10-Q 30 Jul 2010 2010 Q2
* An asterisk sign (*) next to the value indicates that the value is likely invalid.