| Calven Co., Limited | Private company limited by shares | Live |
| CALVEN SHIPPING LIMITED | Private company limited by shares | Dissolved |
| CALVERBRIGHT COMPANY LIMITED | Private company limited by shares | Live |
| CALVERHILL LIMITED | Private company limited by shares | Live |
| CALVERT INSURANCE AGENCIES LIMITED | Private company limited by shares | Dissolved |
| RUTH CALVERT LIMITED | | Live |
| CALVERTON LIMITED | Private company limited by shares | Dissolved |
| CALVERTON LIMITED | Private company limited by shares | Live |
| CALVETTI HOLDINGS LIMITED | Private company limited by shares | Dissolved |