WHITE MOUNTAINS INSURANCE GROUP LTD — 13F-HR Filings
69 13F-HR filings on record
This page lists all 13F-HR filings submitted to the SEC by WHITE MOUNTAINS INSURANCE GROUP LTD (WTM), sorted by most recent first. Each row links to the full filing on EdgarLookup. WHITE MOUNTAINS INSURANCE GROUP LTD has filed 69 13F-HR documents with the SEC since 2009. To view all SEC filings by WHITE MOUNTAINS INSURANCE GROUP LTD, see the full filings list.
All
10-K
10-K/A
10-K405
10-Q
10-Q/A
11-K
13F-HR
13F-NT
3
3/A
4
4/A
424B3
5
8-A12B
8-K
8-K/A
ARS
CORRESP
DEF 14A
DEFA14A
DEFM14A
DEFR14A
N-PX
NT 11-K
PRE 14A
S-3
S-3/A
S-8
S-8 POS
SC 13D
SC 13D/A
SC 13E4
SC 13E4/A
SC 13G
SC 13G/A
SC TO-C
SC TO-I
SC TO-I/A
SC TO-T
SC TO-T/A
SCHEDULE 13D/A
SCHEDULE 13G
SCHEDULE 13G/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| 13F-HR | — | 0001104659-26-014432 | Feb 12, 2026 | Dec 31, 2025 |
| 13F-HR | — | 0001104659-25-110906 | Nov 13, 2025 | Sep 30, 2025 |
| 13F-HR | — | 0001104659-25-076169 | Aug 11, 2025 | Jun 30, 2025 |
| 13F-HR | — | 0001104659-25-047309 | May 12, 2025 | Mar 31, 2025 |
| 13F-HR | — | 0001104659-25-012202 | Feb 12, 2025 | Dec 31, 2024 |
| 13F-HR | — | 0001104659-24-116806 | Nov 12, 2024 | Sep 30, 2024 |
| 13F-HR | — | 0001104659-24-087260 | Aug 8, 2024 | Jun 30, 2024 |
| 13F-HR | — | 0001104659-24-059389 | May 9, 2024 | Mar 31, 2024 |
| 13F-HR | — | 0001104659-24-019920 | Feb 13, 2024 | Dec 31, 2023 |
| 13F-HR | — | 0001104659-23-115989 | Nov 9, 2023 | Sep 30, 2023 |
| 13F-HR | — | 0001104659-23-089581 | Aug 10, 2023 | Jun 30, 2023 |
| 13F-HR | — | 0001104659-23-058759 | May 11, 2023 | Mar 31, 2023 |
| 13F-HR | — | 0001104659-23-019698 | Feb 13, 2023 | Dec 31, 2022 |
| 13F-HR | — | 0001104659-22-116476 | Nov 9, 2022 | Sep 30, 2022 |
| 13F-HR | — | 0001104659-22-089729 | Aug 12, 2022 | Jun 30, 2022 |
| 13F-HR | — | 0001104659-22-059416 | May 12, 2022 | Mar 31, 2022 |
| 13F-HR | — | 0001104659-22-020471 | Feb 11, 2022 | Dec 31, 2021 |
| 13F-HR | — | 0001104659-21-137569 | Nov 12, 2021 | Sep 30, 2021 |
| 13F-HR | — | 0001104659-21-104158 | Aug 12, 2021 | Jun 30, 2021 |
| 13F-HR | — | 0001104659-21-066440 | May 14, 2021 | Mar 31, 2021 |
| 13F-HR | — | 0001104659-21-021926 | Feb 12, 2021 | Dec 31, 2020 |
| 13F-HR | — | 0001104659-16-097037 | Feb 16, 2016 | Dec 31, 2015 |
| 13F-HR | — | 0001104659-15-078365 | Nov 12, 2015 | Sep 30, 2015 |
| 13F-HR | — | 0001104659-15-058884 | Aug 12, 2015 | Jun 30, 2015 |
| 13F-HR | — | 0001104659-15-037914 | May 14, 2015 | Mar 31, 2015 |
| 13F-HR | — | 0001104659-15-010870 | Feb 17, 2015 | Dec 31, 2014 |
| 13F-HR | — | 0001104659-14-080391 | Nov 13, 2014 | Sep 30, 2014 |
| 13F-HR | — | 0001104659-14-058557 | Aug 8, 2014 | Jun 30, 2014 |
| 13F-HR | — | 0001104659-14-037631 | May 12, 2014 | Mar 31, 2014 |
| 13F-HR | — | 0001104659-14-009764 | Feb 13, 2014 | Dec 31, 2013 |
| 13F-HR | — | 0001104659-13-084235 | Nov 13, 2013 | Sep 30, 2013 |
| 13F-HR | — | 0001104659-13-061992 | Aug 9, 2013 | Jun 30, 2013 |
| 13F-HR | 13F-HR | 0001047469-13-005994 | May 14, 2013 | Mar 31, 2013 |
| 13F-HR | 13F-HR | 0001047469-13-000934 | Feb 13, 2013 | Dec 31, 2012 |
| 13F-HR | 13F-HR | 0001047469-12-010511 | Nov 14, 2012 | Sep 30, 2012 |
| 13F-HR | 13F-HR | 0001047469-12-008197 | Aug 13, 2012 | Jun 30, 2012 |
| 13F-HR | 13F-HR | 0001047469-12-005890 | May 14, 2012 | Mar 31, 2012 |
| 13F-HR | 13F-HR | 0001047469-12-000908 | Feb 13, 2012 | Dec 31, 2011 |
| 13F-HR | 13F-HR | 0001047469-11-009543 | Nov 14, 2011 | Sep 30, 2011 |
| 13F-HR | 13F-HR | 0001047469-11-007340 | Aug 12, 2011 | Jun 30, 2011 |
| 13F-HR | 13F-HR | 0001047469-11-005150 | May 13, 2011 | Mar 31, 2011 |
| 13F-HR | 13F-HR | 0001047469-11-000923 | Feb 14, 2011 | Dec 31, 2010 |
| 13F-HR | 13F-HR | 0001047469-10-009685 | Nov 12, 2010 | Sep 30, 2010 |
| 13F-HR | 13F-HR | 0001047469-10-007403 | Aug 12, 2010 | Jun 30, 2010 |
| 13F-HR | 13F-HR | 0001047469-10-005195 | May 12, 2010 | Mar 31, 2010 |
| 13F-HR | 13F-HR | 0001047469-10-000899 | Feb 16, 2010 | Dec 31, 2009 |
| 13F-HR | 13F-HR | 0001047469-09-010067 | Nov 13, 2009 | Sep 30, 2009 |
| 13F-HR | 13F-HR | 0001047469-09-007710 | Aug 13, 2009 | Jun 30, 2009 |
| 13F-HR | 13F-HR | 0001047469-08-009268 | Aug 13, 2008 | Jun 30, 2008 |
| 13F-HR | SCHEDULE 13F-HR | 0001047469-04-017277 | May 14, 2004 | Mar 31, 2004 |