| COTEC COMPANY LIMITED | Private company limited by shares | Dissolved |
| COTEC CO., LIMITED | Private company limited by shares | Live |
| Cotec Vietnam Limited | Private company limited by shares | Live |
| COTECH COMPANY LIMITED | Private company limited by shares | Dissolved |
| CHINA COTECH GROUP LIMITED | Private company limited by shares | Dissolved |
| CO-TECHNIC INTERNATIONAL ADVERTISING LIMITED | Private company limited by shares | Dissolved |
| Cote&Ciel Limited | Private company limited by shares | Live |
| Cote&Ciel China Limited | Private company limited by shares | Live |
| Cotecna Inspection Hong Kong Limited | Private company limited by shares | Live |
| cotecour798 Limited | Private company limited by shares | Live |