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 13E4/A | SC 13E4/A | 28y ago1997-12-08 | - | View filing |
| SC 13E4/A | SC 13E4/A | 28y ago1997-12-03 | - | View filing |
| SC 13E4/A | SC 13E4/A | 28y ago1997-11-12 | - | View filing |
| SC 13E4/A | SC 13E4/A | 30y ago1996-06-07 | - | View filing |
| SC 13E4/A | SC 13E4/A | 30y ago1996-01-12 | - | View filing |
| SC 13E4/A | SC 13E4/A | 30y ago1995-12-27 | - | View filing |
| SC 13E4/A | SC 13E4/A | 31y ago1995-03-21 | - | View filing |
| SC 13E4/A | SC 13E4/A | 31y ago1995-02-22 | - | View filing |