Form 10-Q - Quarterly report [Sections 13 or 15(d)]:
SEC Accession No. 0000776867-25-000006
Filing Date
2025-05-07
Accepted
2025-05-07 08:16:40
Documents
122
Period of Report
2025-03-31

Document Format Files

Seq Description Document Type Size
1 10-Q wtm-20250331.htm   iXBRL 10-Q 3447109
2 EX-10.1 wtm10-q2025exhibit101.htm EX-10.1 17556
3 EX-10.2 wtm10-q2025exhibit102.htm EX-10.2 7266
4 EX-31.1 wtmq12025ex311.htm EX-31.1 9105
5 EX-31.2 wtmq12025ex312.htm EX-31.2 9199
6 EX-32.1 wtmq12025ex321.htm EX-32.1 6326
7 EX-32.2 wtmq12025ex322.htm EX-32.2 6262
13 wtm10-q2025exhibit101001.jpg GRAPHIC 263416
14 wtm10-q2025exhibit101002.jpg GRAPHIC 247043
15 wtm10-q2025exhibit101003.jpg GRAPHIC 270840
16 wtm10-q2025exhibit101004.jpg GRAPHIC 271530
17 wtm10-q2025exhibit101005.jpg GRAPHIC 45377
18 wtm10-q2025exhibit101006.jpg GRAPHIC 71641
19 wtm10-q2025exhibit101007.jpg GRAPHIC 46418
20 wtm10-q2025exhibit101008.jpg GRAPHIC 45135
  Complete submission text file 0000776867-25-000006.txt   20086609

Data Files

Seq Description Document Type Size
8 XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT wtm-20250331.xsd EX-101.SCH 120783
9 XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT wtm-20250331_cal.xml EX-101.CAL 136959
10 XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT wtm-20250331_def.xml EX-101.DEF 803002
11 XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT wtm-20250331_lab.xml EX-101.LAB 1154472
12 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT wtm-20250331_pre.xml EX-101.PRE 977496
124 EXTRACTED XBRL INSTANCE DOCUMENT wtm-20250331_htm.xml XML 3723678
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-Q | Act: 34 | File No.: 001-08993 | Film No.: 25919418
SIC: 6331 Fire, Marine & Casualty Insurance
(CF Office: 02 Finance)