| CALLA COMPANY LIMITED | Private company limited by shares | Dissolved |
| Calla Company Limited | Private company limited by shares | Live |
| CALLA LIMITED | | Live |
| CALLA NETWORKS LIMITED | Private company limited by shares | Live |
| CALLABLE TELECOM LIMITED | Private company limited by shares | Live |
| CALLABONNA LIMITED | Private company limited by shares | Dissolved |
| CALLADINE COMPANY LIMITED | Private company limited by shares | Dissolved |
| CALLAGHAM (CAR-HIRING) LIMITED | Private company limited by shares | Dissolved |
| CALLAHAN & COMPANY LIMITED | Private company limited by shares | Live |
| CALLALOO LIMITED | | Live |
| CALLAMUS LIMITED | Private company limited by shares | Live |
| CALLAN LIMITED | Private company limited by shares | Dissolved |
| CALLAN (CHINA) LIMITED | Private company limited by shares | Live |
| CALLAN GROUP LIMITED | Private company limited by shares | Live |
| CALLAN INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| CALLANCE INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| CALLAND LIMITED | Private company limited by shares | Dissolved |
| CALLANY LIMITED | Private company limited by shares | Live |
| CALLAO TRADING CO. LIMITED | Private company limited by shares | Dissolved |
| Callapin Creative Limited | | Live |
| CALLASTOCK COMPANY LIMITED | Private company limited by shares | Dissolved |
| CALLAWAY LIMITED | Private company limited by shares | Dissolved |
| Callaway HK Ben 1 Limited | Private company limited by shares | Live |
| Callaway HK Ben 2 Limited | Private company limited by shares | Live |
| Callaway HK OpCo Limited | Private company limited by shares | Live |