Hanover Insurance Group, Inc. SEC filings THG
Hanover Insurance Group, Inc. has 1,000 filings in SEC EDGAR's recent list, going back to Aug 28, 2017. Its latest annual report, Form ARS, was filed on Mar 26, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Oct 29, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Oct 28, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 10-Q/A | Amended quarterly report | Nov 5, 2026 | Sep 30, 2026 |
| 4 | Insider transaction | Nov 5, 2026 | Nov 4, 2026 |
| 4 | Insider transaction | Nov 5, 2026 | Nov 4, 2026 |
| 144 | Notice of proposed sale | Nov 4, 2026 | — |
| 10-Q | Quarterly report | Oct 29, 2026 | Sep 30, 2026 |
| 8-K |
Current report
Results of operations
|
Oct 28, 2026 | Oct 28, 2026 |
| 4 | Insider transaction | Sep 28, 2026 | Sep 25, 2026 |
| 4 | Insider transaction | Sep 28, 2026 | Sep 25, 2026 |
| 4 | Insider transaction | Sep 28, 2026 | Sep 25, 2026 |
| 4 | Insider transaction | Sep 28, 2026 | Sep 25, 2026 |
| 4 | Insider transaction | Sep 28, 2026 | Sep 25, 2026 |
| 4 | Insider transaction | Sep 28, 2026 | Sep 25, 2026 |
| 4 | Insider transaction | Sep 28, 2026 | Sep 25, 2026 |
| 4 | Insider transaction | Sep 28, 2026 | Sep 25, 2026 |
| 4 | Insider transaction | Sep 28, 2026 | Sep 25, 2026 |
| 4 | Insider transaction | Sep 28, 2026 | Sep 25, 2026 |
| 4 | Insider transaction | Sep 28, 2026 | Sep 25, 2026 |
| 4 | Insider transaction | Sep 28, 2026 | Sep 25, 2026 |
| 4 | Insider transaction | Sep 28, 2026 | Sep 25, 2026 |
| 4 | Insider transaction | Sep 28, 2026 | Sep 25, 2026 |
| 4 | Insider transaction | Sep 28, 2026 | Sep 25, 2026 |
| 4 | Insider transaction | Sep 28, 2026 | Sep 25, 2026 |
| 4 | Insider transaction | Sep 28, 2026 | Sep 25, 2026 |
| 4 | Insider transaction | Sep 28, 2026 | Sep 25, 2026 |
| 144 | Notice of proposed sale | Sep 16, 2026 | — |
| 4 | Insider transaction | Aug 21, 2026 | Aug 19, 2026 |
| 144 | Notice of proposed sale | Aug 20, 2026 | — |
| 144 | Notice of proposed sale | Aug 19, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 14, 2026 | — |
| 13F-NT | Filing | Aug 12, 2026 | Jun 30, 2026 |
| 144 | Notice of proposed sale | Aug 10, 2026 | — |
| 4 | Insider transaction | Aug 7, 2026 | Aug 5, 2026 |
| 4 | Insider transaction | Aug 4, 2026 | Aug 3, 2026 |
| 144 | Notice of proposed sale | Aug 3, 2026 | — |
| 4 | Insider transaction | Jul 31, 2026 | Jul 29, 2026 |
| 10-Q | Quarterly report | Jul 29, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations
|
Jul 28, 2026 | Jul 28, 2026 |
| 8-K |
Current report
Officer or director change
|
Jul 15, 2026 | Jul 15, 2026 |
| 4 | Insider transaction | Jun 30, 2026 | Jun 26, 2026 |
| 4 | Insider transaction | Jun 30, 2026 | Jun 26, 2026 |
| 4 | Insider transaction | Jun 30, 2026 | Jun 26, 2026 |
| 4 | Insider transaction | Jun 30, 2026 | Jun 26, 2026 |
| 4 | Insider transaction | Jun 30, 2026 | Jun 26, 2026 |
| 4 | Insider transaction | Jun 30, 2026 | Jun 26, 2026 |
| 4 | Insider transaction | Jun 30, 2026 | Jun 26, 2026 |
| 4 | Insider transaction | Jun 30, 2026 | Jun 26, 2026 |
| 4 | Insider transaction | Jun 30, 2026 | Jun 26, 2026 |
| 4 | Insider transaction | Jun 30, 2026 | Jun 26, 2026 |
| 4 | Insider transaction | Jun 30, 2026 | Jun 26, 2026 |
| 4 | Insider transaction | Jun 30, 2026 | Jun 26, 2026 |
| 4 | Insider transaction | Jun 30, 2026 | Jun 26, 2026 |
| 4 | Insider transaction | Jun 30, 2026 | Jun 26, 2026 |
| 4 | Insider transaction | Jun 30, 2026 | Jun 26, 2026 |
| 4 | Insider transaction | Jun 30, 2026 | Jun 26, 2026 |
| 4 | Insider transaction | Jun 30, 2026 | Jun 26, 2026 |
| 4 | Insider transaction | Jun 30, 2026 | Jun 26, 2026 |
| 4 | Insider transaction | Jun 4, 2026 | Jun 3, 2026 |
| 144 | Notice of proposed sale | Jun 3, 2026 | — |
| 4 | Insider transaction | May 26, 2026 | May 21, 2026 |
| 4 | Insider transaction | May 21, 2026 | May 19, 2026 |
| 4 | Insider transaction | May 21, 2026 | May 20, 2026 |
| 144 | Notice of proposed sale | May 21, 2026 | — |
| 144 | Notice of proposed sale | May 20, 2026 | — |
| 144 | Notice of proposed sale | May 20, 2026 | — |
| 4 | Insider transaction | May 19, 2026 | May 15, 2026 |
| 144 | Notice of proposed sale | May 18, 2026 | — |
| 4 | Insider transaction | May 15, 2026 | May 14, 2026 |
| 144 | Notice of proposed sale | May 14, 2026 | — |
| 4 | Insider transaction | May 13, 2026 | May 12, 2026 |
| 4 | Insider transaction | May 13, 2026 | May 12, 2026 |
| 4 | Insider transaction | May 13, 2026 | May 12, 2026 |
| 4 | Insider transaction | May 13, 2026 | May 12, 2026 |
| 4 | Insider transaction | May 13, 2026 | May 12, 2026 |
| 4 | Insider transaction | May 13, 2026 | May 12, 2026 |
| 4 | Insider transaction | May 13, 2026 | May 12, 2026 |
| 4 | Insider transaction | May 13, 2026 | May 12, 2026 |
| 8-K |
Current report
Officer or director change, Shareholder vote results, Other events
|
May 13, 2026 | May 12, 2026 |
| 4 | Insider transaction | May 13, 2026 | May 12, 2026 |
| 4 | Insider transaction | May 13, 2026 | May 12, 2026 |
| 3 | Initial insider ownership | May 13, 2026 | May 13, 2026 |
| 13F-NT | Filing | May 13, 2026 | Mar 31, 2026 |
| 4 | Insider transaction | May 11, 2026 | May 8, 2026 |
| 144 | Notice of proposed sale | May 8, 2026 | — |
| 4 | Insider transaction | May 5, 2026 | May 4, 2026 |
| 4 | Insider transaction | May 4, 2026 | May 1, 2026 |
| 144 | Notice of proposed sale | May 4, 2026 | — |
| 144 | Notice of proposed sale | May 1, 2026 | — |
| 10-Q | Quarterly report | Apr 30, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations
|
Apr 29, 2026 | Apr 29, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 29, 2026 | — |
| 4 | Insider transaction | Mar 31, 2026 | Mar 27, 2026 |
| 4 | Insider transaction | Mar 31, 2026 | Mar 27, 2026 |
| 4 | Insider transaction | Mar 31, 2026 | Mar 27, 2026 |
| 4 | Insider transaction | Mar 31, 2026 | Mar 27, 2026 |
| 4 | Insider transaction | Mar 31, 2026 | Mar 27, 2026 |
| 4 | Insider transaction | Mar 31, 2026 | Mar 27, 2026 |
| 4 | Insider transaction | Mar 31, 2026 | Mar 27, 2026 |
| 4 | Insider transaction | Mar 31, 2026 | Mar 27, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 27, 2026 | — |
| ARS | Annual report to shareholders | Mar 26, 2026 | Dec 31, 2025 |
| DEFA14A | Additional proxy material | Mar 26, 2026 | — |
| DEF 14A | Proxy statement | Mar 26, 2026 | May 12, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Feb 26, 2026 | Feb 24, 2026 |
| 4 | Insider transaction | Feb 26, 2026 | Feb 24, 2026 |
| 4 | Insider transaction | Feb 26, 2026 | Feb 24, 2026 |
| 4 | Insider transaction | Feb 26, 2026 | Feb 24, 2026 |
| 4 | Insider transaction | Feb 26, 2026 | Feb 24, 2026 |
| 4 | Insider transaction | Feb 26, 2026 | Feb 24, 2026 |
| 4 | Insider transaction | Feb 26, 2026 | Feb 24, 2026 |
| 4 | Insider transaction | Feb 26, 2026 | Feb 24, 2026 |
| 10-K | Annual report | Feb 20, 2026 | Dec 31, 2025 |
| 13F-NT | Filing | Feb 12, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Feb 6, 2026 | Feb 5, 2026 |
| 144 | Notice of proposed sale | Feb 5, 2026 | — |
| 8-K |
Current report
Results of operations
|
Feb 4, 2026 | Feb 3, 2026 |
| 4 | Insider transaction | Jan 27, 2026 | Jan 23, 2026 |
| 4 | Insider transaction | Dec 29, 2025 | Dec 26, 2025 |
| 4 | Insider transaction | Dec 29, 2025 | Dec 26, 2025 |
| 4 | Insider transaction | Dec 29, 2025 | Dec 26, 2025 |
| 4 | Insider transaction | Dec 29, 2025 | Dec 26, 2025 |
| 4 | Insider transaction | Dec 29, 2025 | Dec 26, 2025 |
| 4 | Insider transaction | Dec 29, 2025 | Dec 26, 2025 |
| 4 | Insider transaction | Dec 29, 2025 | Dec 26, 2025 |
| 4 | Insider transaction | Dec 29, 2025 | Dec 26, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Dec 16, 2025 | Dec 16, 2025 |
| 4 | Insider transaction | Dec 3, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Dec 3, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Dec 3, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Dec 3, 2025 | Dec 1, 2025 |
| 4 | Insider transaction | Nov 13, 2025 | Nov 12, 2025 |
| 144 | Notice of proposed sale | Nov 12, 2025 | — |
| 13F-NT | Filing | Nov 10, 2025 | Sep 30, 2025 |
| 4 | Insider transaction | Nov 6, 2025 | Nov 5, 2025 |
| 4 | Insider transaction | Nov 5, 2025 | Nov 4, 2025 |
| 10-Q | Quarterly report | Oct 30, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations
|
Oct 29, 2025 | Oct 29, 2025 |
| 25-NSE | Delisting notice | Oct 15, 2025 | — |
| 4 | Insider transaction | Sep 30, 2025 | Sep 26, 2025 |
| 4 | Insider transaction | Sep 30, 2025 | Sep 26, 2025 |
| 4 | Insider transaction | Sep 30, 2025 | Sep 26, 2025 |
| 4 | Insider transaction | Sep 30, 2025 | Sep 26, 2025 |
| 4 | Insider transaction | Sep 30, 2025 | Sep 26, 2025 |
| 4 | Insider transaction | Sep 30, 2025 | Sep 26, 2025 |
| 4 | Insider transaction | Sep 30, 2025 | Sep 26, 2025 |
| 4 | Insider transaction | Sep 30, 2025 | Sep 26, 2025 |
| 8-K |
Current report
New debt, Other events
|
Aug 21, 2025 | Aug 19, 2025 |
| 424B2 | Prospectus | Aug 20, 2025 | — |
| FWP | Free writing prospectus | Aug 19, 2025 | — |
| 424B2 | Prospectus | Aug 19, 2025 | — |
| S-3ASR | Automatic shelf registration | Aug 18, 2025 | — |
| 13F-NT | Filing | Aug 12, 2025 | Jun 30, 2025 |
| 4 | Insider transaction | Aug 5, 2025 | Aug 1, 2025 |
| 144 | Notice of proposed sale | Aug 1, 2025 | — |
| 10-Q | Quarterly report | Jul 31, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations
|
Jul 31, 2025 | Jul 30, 2025 |
| 4 | Insider transaction | Jun 30, 2025 | Jun 27, 2025 |
| 4 | Insider transaction | Jun 30, 2025 | Jun 27, 2025 |
| 4 | Insider transaction | Jun 30, 2025 | Jun 27, 2025 |
| 4 | Insider transaction | Jun 30, 2025 | Jun 27, 2025 |
| 4 | Insider transaction | Jun 30, 2025 | Jun 27, 2025 |
| 4 | Insider transaction | Jun 30, 2025 | Jun 27, 2025 |
| 4 | Insider transaction | Jun 30, 2025 | Jun 27, 2025 |
| 4 | Insider transaction | Jun 30, 2025 | Jun 27, 2025 |
| 4 | Insider transaction | May 23, 2025 | May 23, 2025 |
| 4 | Insider transaction | May 15, 2025 | May 14, 2025 |
| 4 | Insider transaction | May 15, 2025 | May 14, 2025 |
| 4 | Insider transaction | May 15, 2025 | May 14, 2025 |
| 4 | Insider transaction | May 15, 2025 | May 14, 2025 |
| 4 | Insider transaction | May 15, 2025 | May 14, 2025 |
| 4 | Insider transaction | May 15, 2025 | May 14, 2025 |
| 4 | Insider transaction | May 15, 2025 | May 14, 2025 |
| 4 | Insider transaction | May 15, 2025 | May 14, 2025 |
| 4 | Insider transaction | May 15, 2025 | May 14, 2025 |
| 4 | Insider transaction | May 15, 2025 | May 14, 2025 |
| 3 | Initial insider ownership | May 15, 2025 | May 13, 2025 |
| 8-K |
Current report
Shareholder vote results
|
May 14, 2025 | May 13, 2025 |
| 13F-NT | Filing | May 14, 2025 | Mar 31, 2025 |
| 4 | Insider transaction | May 8, 2025 | May 7, 2025 |
| 144 | Notice of proposed sale | May 7, 2025 | — |
| 10-Q | Quarterly report | May 1, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations
|
Apr 30, 2025 | Apr 30, 2025 |
| 8-K |
Current report
Officer or director change
|
Apr 3, 2025 | Mar 31, 2025 |
| 4 | Insider transaction | Apr 2, 2025 | Apr 1, 2025 |
| 144 | Notice of proposed sale | Apr 1, 2025 | — |
| 4 | Insider transaction | Apr 1, 2025 | Mar 28, 2025 |
| 4 | Insider transaction | Apr 1, 2025 | Mar 28, 2025 |
| 4 | Insider transaction | Apr 1, 2025 | Mar 28, 2025 |
| 4 | Insider transaction | Apr 1, 2025 | Mar 28, 2025 |
| 4 | Insider transaction | Apr 1, 2025 | Mar 28, 2025 |
| 4 | Insider transaction | Apr 1, 2025 | Mar 28, 2025 |
| 4 | Insider transaction | Apr 1, 2025 | Mar 28, 2025 |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Fire, Marine & Casualty Insurance (SIC 6331)
- Listed as
- THG (NYSE)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Worcester, MA
- SEC filer status
- Large accelerated filer
- SEC CIK
- 944695
- Former names
- ALLMERICA FINANCIAL CORP (until Nov 14, 2005)
Other Fire, Marine & Casualty Insurance companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.