| SART CASUALTY LIMITED | Private company limited by shares | Live |
| HELLO CASUALWEAR LIMITED | Private company limited by shares | Dissolved |
| EXCELSIOR CASUALWEAR MANUFACTORY LIMITED | Private company limited by shares | Dissolved |
| J. & B. CASUALWEARS LIMITED | Private company limited by shares | Dissolved |
| CASUARINA TRADE & INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| CASUI INDUSTRIAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| CASUKI COMPANY LIMITED | Private company limited by shares | Dissolved |
| CASUM LIMITED | Private company limited by shares | Dissolved |
| CASUM CAPITAL LIMITED | Private company limited by shares | Live |
| CASUNDA ELECTRONICS LIMITED | Private company limited by shares | Live |
| Casunda Tech Limited | Private company limited by shares | Live |
| CASUNY (HK) ELECTRONICS CO., LIMITED | Private company limited by shares | Live |
| CASURINA COMPANY LIMITED | Private company limited by shares | Dissolved |
| CASUS ALLEY SPORTS LIMITED | | Live |
| CASUS ASIA LIMITED | Private company limited by shares | Live |
| Casveate Limited | Private company limited by shares | Live |
| 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 |
| CASYEA LIMITED | Private company limited by shares | Live |