Form 8-K - Current report:
SEC Accession No. 0000776867-25-000009
Filing Date
2025-07-07
Accepted
2025-07-07 08:58:41
Documents
14
Period of Report
2025-07-04
Items
Item 1.01: Entry into a Material Definitive Agreement
Item 9.01: Financial Statements and Exhibits

Document Format Files

Seq Description Document Type Size
1 8-K wtm-20250704.htm   iXBRL 8-K 40689
2 EX-99.1 wtmdppressrelease2025.htm EX-99.1 23992
6 image1a.jpg GRAPHIC 65797
  Complete submission text file 0000776867-25-000009.txt   281579

Data Files

Seq Description Document Type Size
3 XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT wtm-20250704.xsd EX-101.SCH 1872
4 XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT wtm-20250704_lab.xml EX-101.LAB 21629
5 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT wtm-20250704_pre.xml EX-101.PRE 12590
17 EXTRACTED XBRL INSTANCE DOCUMENT wtm-20250704_htm.xml XML 3656
Mailing Address 23 SOUTH MAIN STREET SUITE 3B HANOVER NH 03755
Business Address 23 SOUTH MAIN STREET SUITE 3B HANOVER NH 03755 603 640 2200
WHITE MOUNTAINS INSURANCE GROUP LTD (Filer) CIK: 0000776867 (see all company filings)

EIN.: 942708455 | State of Incorp.: D0 | Fiscal Year End: 1231
Type: 8-K | Act: 34 | File No.: 001-08993 | Film No.: 251107077
SIC: 6331 Fire, Marine & Casualty Insurance
(CF Office: 02 Finance)