White Mountains has retired 78.0% of its shares since 2007, from 10,833,788 to 2,386,721.
| Fiscal year | Date | Shares outstanding | Filing | |
|---|---|---|---|---|
| 1999 | 1999-03-22 | 5,843,731 | 10-K | cover page |
| 2000 | 2000-03-24 | 5,904,534 | 10-K | cover page |
| 2001 | 2001-03-23 | 5,880,115 | 10-K | cover page |
| 2002 | 2002-03-31 | 8,284,181 | 10-K | cover page |
| 2003 | 2003-05-08 | 8,326,087 | 10-K/A | cover page |
| 2004 | 2004-02-27 | 9,001,795 | 10-K | cover page |
| 2005 | 2005-03-01 | 10,774,589 | 10-K | cover page |
| 2006 | 2006-03-03 | 10,780,053 | 10-K | cover page |
| 2007 | 2007-02-28 | 10,833,788 | 10-K | cover page |
| 2008 | 2008-02-28 | 10,547,334 | 10-K | cover page |
| 2009 | 2009-12-31 | 8,860,150 | 10-K | |
| 2010 | 2011-02-24 | 8,025,200 | 10-K | |
| 2011 | 2012-02-29 | 7,454,585 | 10-K | |
| 2012 | 2013-02-28 | 6,316,210 | 10-K | |
| 2013 | 2014-02-28 | 6,179,986 | 10-K | |
| 2014 | 2015-02-27 | 5,991,549 | 10-K | |
| 2015 | 2016-02-25 | 5,553,407 | 10-K | |
| 2016 | 2017-02-24 | 4,561,057 | 10-K | |
| 2017 | 2018-02-26 | 3,742,408 | 10-K | |
| 2018 | 2019-02-25 | 3,167,436 | 10-K | |
| 2019 | 2020-02-28 | 3,193,509 | 10-K/A | |
| 2020 | 2021-02-24 | 3,095,829 | 10-K/A | |
| 2021 | 2022-02-23 | 3,000,849 | 10-K | |
| 2022 | 2023-02-21 | 2,567,527 | 10-K | |
| 2023 | 2024-02-21 | 2,555,183 | 10-K | |
| 2024 | 2025-02-24 | 2,563,051 | 10-K | |
| 2025 | 2026-02-23 | 2,467,055 | 10-K |
Source: all 10-K filings of White Mountains on EDGAR. Download this series as CSV. Licence CC BY 4.0, credit Buyback Radar.
Part of every buyback only replaces shares handed to employees. That part costs money and retires nothing, so the cost per share that disappeared is higher than the average price the company paid.
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