Group Companies
| BERMUDA | US | UK |
| Sirius International Limited (Bermuda) | Citadel Risk Services, Inc. | Citadel Risk Services UK, Limited |
| Citadel Reinsurance Company Limited (Bermuda) | Citadel Risk Management, Inc. | Citadel Underwriting Limited |
| Citadel International Reinsurance Company Limited (Bermuda) | Great Falls Insurance Company (64.4% share owned) | |
| American Millennium Insurance Company |