WHITE MOUNTAINS INSURANCE GROUP LTD (WTM) Form 10-K Annual Reports
WHITE MOUNTAINS INSURANCE GROUP LTD (WTM) is a publicly traded company on the NYSE, categorized under SIC 6331 (Fire, Marine & Casualty Insurance). Access real-time SEC filings, 10-K annual reports, 10-Q quarterlies, 8-K current reports, PCAOB auditor history, and executive compensation disclosures.
Ticker: WTM
CIK: 776867
Exchange: NYSE
SIC 6331: Fire, Marine & Casualty Insurance
Fiscal Year End: 12/31
State: D0
Independent PCAOB Auditor
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Audit Firm
PricewaterhouseCoopers LLP
Auditor SinceSince 12/31/2016 12:00:00 AM
Lead Engagement PartnerKostadin Doukov
Audit LocationAtlanta, Georgia, United States
Latest SEC EDGAR Filings
Showing 10-K, 10-Q, 8-K, Form 4, and other SEC submissions| Form | Filing Date | Reporting Period | Description | Accession Number | Actions |
|---|---|---|---|---|---|
| 4 | 2026-08-31 | 2026-08-31 | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 0000776867-26-000051 | View SEC Doc Filr Page |
| 4 | 2026-08-27 | 2026-08-26 | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 0000776867-26-000049 | View SEC Doc Filr Page |
| 3 | 2026-08-27 | 2026-08-26 | INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES | 0000776867-26-000047 | View SEC Doc Filr Page |
| 8-K | 2026-08-27 | 2026-08-26 | 8-K | 0001628280-26-059191 | View SEC Doc Filr Page |
| N-PX | 2026-08-26 | 2026-06-30 | N-PX Filing | 0001104659-26-101494 | View SEC Doc Filr Page |
| 13F-HR | 2026-08-12 | 2026-06-30 | 13F-HR Filing | 0001104659-26-094905 | View SEC Doc Filr Page |
| 10-Q | 2026-08-06 | 2026-06-30 | 10-Q | 0001628280-26-053932 | View SEC Doc Filr Page |
| 8-K | 2026-08-06 | 2026-08-06 | 8-K | 0001628280-26-053913 | View SEC Doc Filr Page |
| 11-K | 2026-06-30 | 2025-12-31 | 11-K | 0001628280-26-046118 | View SEC Doc Filr Page |
| 8-K | 2026-06-05 | 2026-06-05 | 8-K | 0001628280-26-041051 | View SEC Doc Filr Page |
| 4 | 2026-05-22 | 2026-05-21 | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 0000776867-26-000045 | View SEC Doc Filr Page |
| 4 | 2026-05-22 | 2026-05-21 | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 0000776867-26-000044 | View SEC Doc Filr Page |
| 4 | 2026-05-22 | 2026-05-21 | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 0000776867-26-000043 | View SEC Doc Filr Page |
| 4 | 2026-05-22 | 2026-05-21 | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 0000776867-26-000042 | View SEC Doc Filr Page |
| 4 | 2026-05-22 | 2026-05-21 | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 0000776867-26-000041 | View SEC Doc Filr Page |
| 4 | 2026-05-22 | 2026-05-21 | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 0000776867-26-000040 | View SEC Doc Filr Page |
| 3 | 2026-05-22 | 2026-05-21 | INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES | 0000776867-26-000039 | View SEC Doc Filr Page |
| 4 | 2026-05-22 | 2026-05-21 | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 0000776867-26-000038 | View SEC Doc Filr Page |
| 4 | 2026-05-22 | 2026-05-21 | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 0000776867-26-000037 | View SEC Doc Filr Page |
| 4 | 2026-05-22 | 2026-05-21 | STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 0000776867-26-000036 | View SEC Doc Filr Page |
| 8-K | 2026-05-21 | 2026-05-21 | 8-K | 0001628280-26-037284 | View SEC Doc Filr Page |
| 8-K | 2026-05-15 | 2026-05-14 | 8-K | 0001628280-26-035349 | View SEC Doc Filr Page |
| 13F-HR | 2026-05-12 | 2026-03-31 | 13F-HR Filing | 0001104659-26-059351 | View SEC Doc Filr Page |
| SCHEDULE 13G/A | 2026-05-07 | — | SCHEDULE 13G/A Filing | 0001465109-26-000020 | View SEC Doc Filr Page |
| 10-Q | 2026-05-06 | 2026-03-31 | 10-Q | 0001628280-26-030935 | View SEC Doc Filr Page |