# Filing Detail

Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0001193125-26-060983
Filing Date
2026-02-20
Accepted
2026-02-20 13:43:12
Documents
142
Period of Report
2025-12-31

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | 10-K | thg-20251231.htm iXBRL | 10-K | 12988247
2 | EX-4.14 | thg-ex4_14.htm | EX-4.14 | 30424
3 | EX-10.2 | thg-ex10_2.htm | EX-10.2 | 2026951
4 | EX-10.3 | thg-ex10_3.htm | EX-10.3 | 661158
5 | EX-21 | thg-ex21.htm | EX-21 | 22210
6 | EX-23 | thg-ex23.htm | EX-23 | 4435
7 | EX-24 | thg-ex24.htm | EX-24 | 55356
8 | EX-31.1 | thg-ex31_1.htm | EX-31.1 | 16098
9 | EX-31.2 | thg-ex31_2.htm | EX-31.2 | 15831
10 | EX-32.1 | thg-ex32_1.htm | EX-32.1 | 10482
11 | EX-32.2 | thg-ex32_2.htm | EX-32.2 | 11524
12 | GRAPHIC | gfx96133587_0.gif | GRAPHIC | 1021
13 | GRAPHIC | gfx95210066_0.gif | GRAPHIC | 1021
| Complete submission text file | 0001193125-26-060983.txt |  | 58198769

Data Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
14 | XBRL TAXONOMY EXTENSION SCHEMA WITH EMBEDDED LINKBASES DOCUMENT | thg-20251231.xsd | EX-101.SCH | 3270284
145 | EXTRACTED XBRL INSTANCE DOCUMENT | thg-20251231_htm.xml | XML | 17111326

Mailing Address 440 LINCOLN ST WORCESTER MA 01653
Business Address 440 LINCOLN ST WORCESTER MA 01653 5088551000
HANOVER INSURANCE GROUP, INC. (Filer) CIK: 0000944695 (see all company filings)

EIN.: 043263626 | State of Incorp.: DE | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 001-13754 | Film No.: 26658484
SIC: 6331 Fire, Marine & Casualty Insurance
(CF Office: 02 Finance)