Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0000776867-21-000004
Filing Date
2021-02-26
Accepted
2021-02-26 09:20:48
Documents
152
Period of Report
2020-12-31

Document Format Files

Seq Description Document Type Size
1 10-K wtm-20201231.htm   iXBRL 10-K 6657137
2 EX-4 wtm10-k2020exhibit4.htm EX-4 15312
3 EX-10.13 wtm10-k2020exhibit1013.htm EX-10.13 88383
4 EX-10.14 wtm10-k2020exhibit1014.htm EX-10.14 89257
5 EX-21 wtm10-k2020exhibit21.htm EX-21 28870
6 EX-23 wtm10-k2020exhibit23.htm EX-23 2079
7 EX-24 wtm10-k2020exhibit24.htm EX-24 21622
8 EX-31.1 wtm10-k2020ex311.htm EX-31.1 10196
9 EX-31.2 wtm10-k2020ex312.htm EX-31.2 10304
10 EX-32.1 wtm10-k2020exhibit321.htm EX-32.1 6843
11 EX-32.2 wtm10-k2020exhibit322.htm EX-32.2 7002
17 wtm-20201231_g1.jpg GRAPHIC 95218
  Complete submission text file 0000776867-21-000004.txt   29461119

Data Files

Seq Description Document Type Size
12 XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT wtm-20201231.xsd EX-101.SCH 146984
13 XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT wtm-20201231_cal.xml EX-101.CAL 203249
14 XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT wtm-20201231_def.xml EX-101.DEF 1227804
15 XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT wtm-20201231_lab.xml EX-101.LAB 1504759
16 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT wtm-20201231_pre.xml EX-101.PRE 1401243
18 EXTRACTED XBRL INSTANCE DOCUMENT wtm-20201231_htm.xml XML 6511864
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: 10-K | Act: 34 | File No.: 001-08993 | Film No.: 21684147
SIC: 6331 Fire, Marine & Casualty Insurance