WTM - Company ID 0000776867
WHITE MOUNTAINS INSURANCE GROUP LTD has filed 1,716 public company documents between 1994 and 2026. The most frequent type is insider trade (634 filings), alongside the regular cadence of annual reports, quarterly reports, and event disclosures every public company must make. Use the filters to focus on one filing type, or flip the sort to trace the company's history from its earliest paperwork.
Data parsed from SEC EDGAR XBRL filings. See the full market cap rankings.
| Type | Filing | Filed | Period covered | Open |
|---|---|---|---|---|
| SC 13G/A | Passive ownership stake (update) | 13y ago2013-02-13 | - | View filing |
| 13F-HR | Institutional holdings | 13y ago2013-02-13 | 2012-12-31 | View filing |
| 3 | New insider ownership | 13y ago2013-02-06 | 2013-02-05 | View filing |
| 5 | Annual insider summary | 13y ago2013-02-06 | 2012-12-31 | View filing |
| 8-K | Major company event | 13y ago2013-02-05 | 2013-02-05 | View filing |
| SC 13G/A | Passive ownership stake (update) | 13y ago2013-01-30 | - | View filing |
| CORRESP | Company correspondence | 13y ago2013-01-18 | - | View filing |
| 4 | Insider trade | 13y ago2013-01-02 | 2012-12-31 | View filing |
| 4 | Insider trade | 13y ago2013-01-02 | 2012-12-31 | View filing |
| 4 | Insider trade | 13y ago2013-01-02 | 2012-12-31 | View filing |
| 4 | Insider trade | 13y ago2013-01-02 | 2012-12-31 | View filing |
| 4 | Insider trade | 13y ago2013-01-02 | 2012-12-31 | View filing |