White Mountains Insurance Group Ltd
WTMNYSECIK 776867FinancialsFiscal year ends Dec 31
Reports and events: 310 filings
Newest first, by EDGAR acceptance time (Eastern). Each filing’s page lists its documents on sec.gov and, for 10-K and 10-Q reports, the extracted sections.
What the forms are: 10-K, 10-Q, 8-K, Form 4, DEF 14A, Schedule 13D, Schedule 13G, amendments, accession numbers.
| Filed | Form | What it is | Accession number |
|---|---|---|---|
| 2026-08-2708:11 ET | 8-K | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001628280-26-059191 |
| 2026-08-0608:50 ET | 10-Q | Quarterly reportPeriod 2026-06-30 | 0001628280-26-053932 |
| 2026-08-0608:14 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001628280-26-053913 |
| 2026-06-0508:17 ET | 8-K | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001628280-26-041051 |
| 2026-05-2116:21 ET | 8-K | 5.02 Departure or appointment of officers or directors; 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0001628280-26-037284 |
| 2026-05-1509:02 ET | 8-K | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 9.01 Financial statements and exhibits | 0001628280-26-035349 |
| 2026-05-0608:31 ET | 10-Q | Quarterly reportPeriod 2026-03-31 | 0001628280-26-030935 |
| 2026-05-0608:20 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001628280-26-030930 |
| 2026-05-0117:30 ET | SCHEDULE 13D/A | Ownership report, active investor, amended | 0000950157-26-000566 |
| 2026-04-0116:21 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0001628280-26-022818 |
| 2026-04-0116:00 ET | DEF 14A | Proxy statementPeriod 2026-05-21 | 0001104659-26-038487 |
| 2026-02-2709:21 ET | 10-K | Annual reportPeriod 2025-12-31 | 0001628280-26-012603 |
| 2026-02-2617:19 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0001628280-26-012417 |
| 2026-02-0608:21 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001628280-26-005947 |
| 2026-01-0708:02 ET | 8-K | 8.01 Other events | 0001628280-26-001102 |
| 2025-12-0808:10 ET | 8-K | 2.01 Completion of an acquisition or disposition; 8.01 Other events; 9.01 Financial statements and exhibits | 0001628280-25-055702 |
| 2025-11-0609:07 ET | 10-Q | Quarterly reportPeriod 2025-09-30 | 0001628280-25-049910 |
| 2025-11-0608:18 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001628280-25-049888 |
| 2025-10-0316:20 ET | 8-K | 1.01 Entry into a material agreement; 9.01 Financial statements and exhibits | 0001628280-25-044062 |
| 2025-09-0308:06 ET | 8-K | 8.01 Other events | 0000776867-25-000016 |
| 2025-09-0208:19 ET | 8-K | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0000776867-25-000015 |
| 2025-08-0816:22 ET | SCHEDULE 13D/A | Ownership report, active investor, amended | 0000950157-25-000649 |
| 2025-08-0708:28 ET | 10-Q | Quarterly reportPeriod 2025-06-30 | 0000776867-25-000014 |
| 2025-08-0708:03 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000776867-25-000013 |
| 2025-07-1809:25 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0000776867-25-000012 |
| 2025-07-1616:29 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0000776867-25-000011 |
| 2025-07-0708:58 ET | 8-K | 1.01 Entry into a material agreement; 9.01 Financial statements and exhibits | 0000776867-25-000009 |
| 2025-06-0607:59 ET | 8-K | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0000776867-25-000008 |
| 2025-05-2216:18 ET | 8-K | 5.07 Shareholder vote results | 0000776867-25-000007 |
| 2025-05-0708:16 ET | 10-Q | Quarterly reportPeriod 2025-03-31 | 0000776867-25-000006 |
| 2025-05-0708:14 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000776867-25-000005 |
| 2025-04-1008:02 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0000776867-25-000004 |
| 2025-04-0216:01 ET | DEF 14A | Proxy statementPeriod 2025-05-22 | 0001104659-25-031124 |
| 2025-02-2808:47 ET | 10-K | Annual reportPeriod 2024-12-31 | 0000776867-25-000003 |
| 2025-02-0708:12 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000776867-25-000002 |
| 2025-01-0808:06 ET | 8-K | 8.01 Other events | 0000776867-25-000001 |
| 2024-11-0608:17 ET | 10-Q | Quarterly reportPeriod 2024-09-30 | 0000776867-24-000019 |
| 2024-11-0608:09 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000776867-24-000018 |
| 2024-08-0708:48 ET | 10-Q | Quarterly reportPeriod 2024-06-30 | 0000776867-24-000015 |
| 2024-08-0708:26 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000776867-24-000014 |
| 2024-06-0708:06 ET | 8-K | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0000776867-24-000013 |
| 2024-05-2316:08 ET | 8-K | 5.07 Shareholder vote results | 0000776867-24-000011 |
| 2024-05-0919:44 ET | SC 13D/A | Ownership report, active investor, amended | 0000950157-24-000731 |
| 2024-05-0916:17 ET | 10-Q | Quarterly reportPeriod 2024-03-31 | 0000776867-24-000010 |
| 2024-05-0916:13 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000776867-24-000009 |
| 2024-05-0317:10 ET | SC 13D/A | Ownership report, active investor, amended | 0000776867-24-000008 |
| 2024-04-1016:10 ET | 8-K | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0000776867-24-000006 |
| 2024-04-0406:04 ET | DEF 14A | Proxy statementPeriod 2024-05-23 | 0001104659-24-043314 |
| 2024-02-2608:58 ET | 10-K | Annual reportPeriod 2023-12-31 | 0000776867-24-000005 |
| 2024-02-2308:19 ET | 8-K | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0000776867-24-000004 |
Source: SEC EDGAR, the company’s filing index. Last ingested by Listed: Oct 30, 2026, 21:03 ET. Listed shows no prices and gives no investment advice.