| COCE LIMITED | Private company limited by shares | Live |
| C-OCEAN (HONGKONG) LIMITED | Private company limited by shares | Live |
| COCEAN TECHNOLOGY (HONGKONG) CO., LIMITED | Private company limited by shares | Live |
| Co-Cell Co., Limited | Private company limited by shares | Live |
| HONGKONG COCELL BIOTECH CO., LIMITED | Private company limited by shares | Live |
| Co-Cell Technology Limited | Private company limited by shares | Live |
| COCEN ELECTRONICS (HONGKONG) CO., LIMITED | Private company limited by shares | Live |
| CO-CENTRE LIMITED | Private company limited by shares | Dissolved |
| CO-CENTRE DEVELOPMENTS LIMITED | Private company limited by shares | Dissolved |
| CO-CENTRE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| CO-CENTURY LIMITED | Private company limited by shares | Dissolved |