Exhibit 21
Direct and Indirect Subsidiaries of the Registrant
I. The Hanover Insurance Group, Inc. (Delaware)
| A. | Opus Investment Management, Inc. (Massachusetts) |
| a. | The Hanover Insurance Company (New Hampshire) |
| 1. | Citizens Insurance Company of America (Michigan) |
| 2. | Allmerica Financial Benefit Insurance Company (Michigan) |
| 3. | Allmerica Plus Insurance Agency, Inc. (Massachusetts) |
| 4. | The Hanover American Insurance Company (New Hampshire) |
| 5. | Citizens Insurance Company of Ohio (Ohio) |
| 6. | Citizens Insurance Company of The Midwest (Indiana) |
| 7. | The Hanover New Jersey Insurance Company (New Hampshire) |
| 8. | Massachusetts Bay Insurance Company (New Hampshire) |
| 9. | Allmerica Financial Alliance Insurance Company (New Hampshire) |
| 10. | Professionals Direct, Inc. (Michigan) |
| (i) | Professionals Direct Insurance Services, Inc. (Michigan) |
| 11. | Verlan Fire Insurance Company (New Hampshire) |
| 12. | The Hanover National Insurance Company (New Hampshire) |
| 13. | AIX, Inc. (Delaware) |
| (i) | AIX Insurance Services of California, Inc. (California) |
| 14. | NOVA Casualty Company (New York) |
| (i)AIX Specialty Insurance Company (Delaware) |
| (ii)AIXHI LLC (Massachusetts) |
| 1. NAG MERGER LLC (Massachusetts) |
| 15. | 440 Lincoln Street Holding Company LLC (Massachusetts) |
| 16. | Campmed Casualty & Indemnity Company, Inc. (New Hampshire) |
| 17. | CitySquare II Investment Company LLC (Massachusetts) |
| (i) | Front Street Financing LLC (Massachusetts) |
| 18 | The Hanover Atlantic Insurance Company Ltd. (Bermuda) |
| 19. | The Hanover Casualty Company (Texas) |
| b. | Citizens Insurance Company of Illinois (Illinois) |
| c. | CitySquare II Development Co. LLC (Massachusetts) |
| B. | VeraVest Investments, Inc. (Massachusetts) |
| C. | Verlan Holdings, Inc. (Maryland) |
| a. | Hanover Specialty Insurance Brokers, Inc. (Virginia) |
| D. | Campania Holding Company, Inc. (Virginia) |
| E. | Educators Insurance Agency, Inc. (Massachusetts) |