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Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0000776867-24-000005
Filing Date
2024-02-26
Accepted
2024-02-26 08:58:07
Documents
156
Period of Report
2023-12-31

Document Format Files

Seq Description Document Type Size
1 10-K wtm-20231231.htm   iXBRL 10-K 7152997
2 EX-4 wtm10-k2023exhibit4.htm EX-4 15492
3 EX-21 wtm10-k2023exhibit21.htm EX-21 25935
4 EX-23.1 wtm10-k2023exhibit231.htm EX-23.1 1721
5 EX-23.2 wtm10-k2023exhibit232.htm EX-23.2 1846
6 EX-24 wtm10-k2023exhibit24.htm EX-24 32442
7 EX-31.1 wtm10-k2023exhibit311.htm EX-31.1 9148
8 EX-31.2 wtm10-k2023exhibit312.htm EX-31.2 9081
9 EX-32.1 wtm10-k2023exhibit321.htm EX-32.1 6683
10 EX-32.2 wtm10-k2023exhibit322.htm EX-32.2 6898
11 EX-97.1 wtm10-k2023exhibit971.htm EX-97.1 16907
17 wtm-20231231_g1.jpg GRAPHIC 101390
  Complete submission text file 0000776867-24-000005.txt   31874863

Data Files

Seq Description Document Type Size
12 XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT wtm-20231231.xsd EX-101.SCH 173501
13 XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT wtm-20231231_cal.xml EX-101.CAL 220365
14 XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT wtm-20231231_def.xml EX-101.DEF 1184540
15 XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT wtm-20231231_lab.xml EX-101.LAB 1760654
16 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT wtm-20231231_pre.xml EX-101.PRE 1414891
157 EXTRACTED XBRL INSTANCE DOCUMENT wtm-20231231_htm.xml XML 6548096
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)

IRS No.: 942708455 | State of Incorp.: D0 | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 001-08993 | Film No.: 24673767
SIC: 6331 Fire, Marine & Casualty Insurance
(CF Office: 02 Finance)