| CASW GEOTECHNIC CONSULTING ENGINEERS LIMITED | Private company limited by shares | Dissolved |
| CASWAY LIMITED | Private company limited by shares | Live |
| CASWELL COMPANY LIMITED | Private company limited by shares | Dissolved |
| CASWELL DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| Caswell Development Limited | Private company limited by shares | Live |
| CASWELL INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| Caswell International Trading Co., Limited | | Live |
| CASWELL-MASSEY (ASIA) LIMITED | Private company limited by shares | Dissolved |
| CASWER WATER INDUSTRY (HONGKONG) HOLDING GROUP LIMITED | Private company limited by shares | Live |
| CASWER PHARMACY LIMITED | Private company limited by shares | Live |
| CASWICK LIMITED | Private company limited by shares | Dissolved |
| CASWICK INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| CASWIER LIMITED | Private company limited by shares | Live |
| CASWIN LIMITED | Private company limited by shares | Live |