| CASTO LIMITED | Private company limited by shares | Dissolved |
| CASTON COMPANY LIMITED | Private company limited by shares | Dissolved |
| CASTON TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| CASTON GROUP CORPORATION LIMITED | Private company limited by shares | Live |
| CASTON DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| FRANCE CASTON GRAPE MANOR LIMITED | Private company limited by shares | Live |
| HONGKONG CASTON TRADING CO., LIMITED | Private company limited by shares | Live |
| CASTON HOTEL CO., LIMITED | Private company limited by shares | Live |
| CASTON INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| CASTON INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| CASTON INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| HONG KONG CASTON INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| CASTON INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| CASTON INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| CASTONA INVESTMENT LIMITED | Private company limited by shares | Live |
| CASTONE ENTERPRISE CO., LIMITED | Private company limited by shares | Dissolved |
| Castone Technology (HK) Co., Limited | Private company limited by shares | Live |
| CASTOP COMPANY LIMITED | Private company limited by shares | Dissolved |
| Castopia Limited | | Live |
| CASTOR COMPANY LIMITED | Private company limited by shares | Dissolved |
| Castor Limited | Private company limited by shares | Live |
| CASTOR LIMITED | Private company limited by shares | Live |
| CASTOR HOLDING LIMITED | Private company limited by shares | Live |
| CASTOR INVESTMENTS LIMITED | Private company limited by shares | Live |
| HONGKONG CASTOR AND POLLUX MARINE & OFFSHORE TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Castor Advanced Solutions Limited | Private company limited by shares | Dissolved |
| CASTORES MAGI (HONG KONG) LIMITED | Private company limited by shares | Live |
| CASTORES MAGI ASIA LIMITED | Private company limited by shares | Live |
| CASTORP LIMITED | Private company limited by shares | Dissolved |
| British Castors Limited | Private company limited by shares | Live |