# Filing Detail

Form 8-K - Current report:
SEC Accession No. 0000776867-25-000008
Filing Date
2025-06-06
Accepted
2025-06-06 07:59:51
Documents
83
Period of Report
2025-06-06
Items
Item 7.01: Regulation FD Disclosure
Item 9.01: Financial Statements and Exhibits

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | 8-K | wtm-20250606.htm iXBRL | 8-K | 23213
2 | EX-99.1 | wtm8-k2025exhibit991.htm | EX-99.1 | 78559
6 |  | wtm8-k2025exhibit991001.jpg | GRAPHIC | 49518
7 |  | wtm8-k2025exhibit991002.jpg | GRAPHIC | 208692
8 |  | wtm8-k2025exhibit991003.jpg | GRAPHIC | 105860
9 |  | wtm8-k2025exhibit991004.jpg | GRAPHIC | 29834
10 |  | wtm8-k2025exhibit991005.jpg | GRAPHIC | 29995
11 |  | wtm8-k2025exhibit991006.jpg | GRAPHIC | 66492
12 |  | wtm8-k2025exhibit991007.jpg | GRAPHIC | 66513
13 |  | wtm8-k2025exhibit991008.jpg | GRAPHIC | 31986
14 |  | wtm8-k2025exhibit991009.jpg | GRAPHIC | 87864
15 |  | wtm8-k2025exhibit991010.jpg | GRAPHIC | 59244
16 |  | wtm8-k2025exhibit991011.jpg | GRAPHIC | 31006
17 |  | wtm8-k2025exhibit991012.jpg | GRAPHIC | 70085
18 |  | wtm8-k2025exhibit991013.jpg | GRAPHIC | 104576
19 |  | wtm8-k2025exhibit991014.jpg | GRAPHIC | 71683
20 |  | wtm8-k2025exhibit991015.jpg | GRAPHIC | 70881
21 |  | wtm8-k2025exhibit991016.jpg | GRAPHIC | 75798
22 |  | wtm8-k2025exhibit991017.jpg | GRAPHIC | 109566
23 |  | wtm8-k2025exhibit991018.jpg | GRAPHIC | 69662
24 |  | wtm8-k2025exhibit991019.jpg | GRAPHIC | 64040
25 |  | wtm8-k2025exhibit991020.jpg | GRAPHIC | 89914
26 |  | wtm8-k2025exhibit991021.jpg | GRAPHIC | 95452
27 |  | wtm8-k2025exhibit991022.jpg | GRAPHIC | 83771
28 |  | wtm8-k2025exhibit991023.jpg | GRAPHIC | 73938
29 |  | wtm8-k2025exhibit991024.jpg | GRAPHIC | 75702
30 |  | wtm8-k2025exhibit991025.jpg | GRAPHIC | 72750
31 |  | wtm8-k2025exhibit991026.jpg | GRAPHIC | 86013
32 |  | wtm8-k2025exhibit991027.jpg | GRAPHIC | 101689
33 |  | wtm8-k2025exhibit991028.jpg | GRAPHIC | 79496
34 |  | wtm8-k2025exhibit991029.jpg | GRAPHIC | 100858
35 |  | wtm8-k2025exhibit991030.jpg | GRAPHIC | 95588
36 |  | wtm8-k2025exhibit991031.jpg | GRAPHIC | 75224
37 |  | wtm8-k2025exhibit991032.jpg | GRAPHIC | 98404
38 |  | wtm8-k2025exhibit991033.jpg | GRAPHIC | 73899
39 |  | wtm8-k2025exhibit991034.jpg | GRAPHIC | 101411
40 |  | wtm8-k2025exhibit991035.jpg | GRAPHIC | 128646
41 |  | wtm8-k2025exhibit991036.jpg | GRAPHIC | 100818
42 |  | wtm8-k2025exhibit991037.jpg | GRAPHIC | 93730
43 |  | wtm8-k2025exhibit991038.jpg | GRAPHIC | 80570
44 |  | wtm8-k2025exhibit991039.jpg | GRAPHIC | 94951
45 |  | wtm8-k2025exhibit991040.jpg | GRAPHIC | 85734
46 |  | wtm8-k2025exhibit991041.jpg | GRAPHIC | 91247
47 |  | wtm8-k2025exhibit991042.jpg | GRAPHIC | 91142
48 |  | wtm8-k2025exhibit991043.jpg | GRAPHIC | 92504
49 |  | wtm8-k2025exhibit991044.jpg | GRAPHIC | 85838
50 |  | wtm8-k2025exhibit991045.jpg | GRAPHIC | 100046
51 |  | wtm8-k2025exhibit991046.jpg | GRAPHIC | 29568
52 |  | wtm8-k2025exhibit991047.jpg | GRAPHIC | 74591
53 |  | wtm8-k2025exhibit991048.jpg | GRAPHIC | 82797
54 |  | wtm8-k2025exhibit991049.jpg | GRAPHIC | 94598
55 |  | wtm8-k2025exhibit991050.jpg | GRAPHIC | 30190
56 |  | wtm8-k2025exhibit991051.jpg | GRAPHIC | 69179
57 |  | wtm8-k2025exhibit991052.jpg | GRAPHIC | 91798
58 |  | wtm8-k2025exhibit991053.jpg | GRAPHIC | 112620
59 |  | wtm8-k2025exhibit991054.jpg | GRAPHIC | 33382
60 |  | wtm8-k2025exhibit991055.jpg | GRAPHIC | 266540
61 |  | wtm8-k2025exhibit991056.jpg | GRAPHIC | 162906
62 |  | wtm8-k2025exhibit991057.jpg | GRAPHIC | 97822
63 |  | wtm8-k2025exhibit991058.jpg | GRAPHIC | 98206
64 |  | wtm8-k2025exhibit991059.jpg | GRAPHIC | 82505
65 |  | wtm8-k2025exhibit991060.jpg | GRAPHIC | 127707
66 |  | wtm8-k2025exhibit991061.jpg | GRAPHIC | 129599
67 |  | wtm8-k2025exhibit991062.jpg | GRAPHIC | 86158
68 |  | wtm8-k2025exhibit991063.jpg | GRAPHIC | 116584
69 |  | wtm8-k2025exhibit991064.jpg | GRAPHIC | 112049
70 |  | wtm8-k2025exhibit991065.jpg | GRAPHIC | 56927
71 |  | wtm8-k2025exhibit991066.jpg | GRAPHIC | 124201
72 |  | wtm8-k2025exhibit991067.jpg | GRAPHIC | 130265
73 |  | wtm8-k2025exhibit991068.jpg | GRAPHIC | 105053
74 |  | wtm8-k2025exhibit991069.jpg | GRAPHIC | 122059
75 |  | wtm8-k2025exhibit991070.jpg | GRAPHIC | 54730
| Complete submission text file | 0000776867-25-000008.txt |  | 8849354

Data Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
3 | XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT | wtm-20250606.xsd | EX-101.SCH | 1872
4 | XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT | wtm-20250606_lab.xml | EX-101.LAB | 21629
5 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT | wtm-20250606_pre.xml | EX-101.PRE | 12590
86 | EXTRACTED XBRL INSTANCE DOCUMENT | wtm-20250606_htm.xml | XML | 3646

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.: 251028912
SIC: 6331 Fire, Marine & Casualty Insurance
(CF Office: 02 Finance)