| CTEC LIMITED | Private company limited by shares | Dissolved |
| CTEC LIMITED | Private company limited by shares | Dissolved |
| CTEC LIMITED | Private company limited by shares | Live |
| CTEC Communication Limited | | Live |
| CTEC ELECTRONICS (HK) CO., LIMITED | Private company limited by shares | Dissolved |
| C-TEC ELECTRONICS HONG KONG LIMITED | Private company limited by shares | Live |
| CTEC GROUP CORPORATION LIMITED | Private company limited by shares | Dissolved |
| CTEC INDUSTRIAL SOLUTION LIMITED | Private company limited by shares | Dissolved |
| C-TEC PRECISION COMPANY LIMITED | Private company limited by shares | Dissolved |
| CTEC TRADING GROUP LIMITED | Private company limited by shares | Dissolved |
| C-TECH LIMITED | Private company limited by shares | Live |
| GLZ C-Tech HK Limited | Private company limited by shares | Live |
| C-TECH ASIA LIMITED | Private company limited by shares | Dissolved |
| C-TECH SOLUTIONS CO., LIMITED | Private company limited by shares | Live |
| C-TECH DEVELOP LIMITED | Private company limited by shares | Live |
| Ctech Electronic Limited | Private company limited by shares | Live |
| C-Tech Elevations Limited | Private company limited by shares | Live |
| C-TECH ENGINEERING LIMITED | Private company limited by shares | Live Commenced dormancy on 05-May-2005 |
| C-Tech (Finance) Limited | Private company limited by shares | Live |
| C-TECH GLOBAL HK LIMITED | Private company limited by shares | Live |
| Ctech Global Limited | | Live |
| C-Tech Elevations (Hollywood) Limited | | Live |
| CTECH INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| C-Tech Laundry Investment Company Limited | Private company limited by shares | Live |
| C-Tech Laundry (0003) Investment Company Limited | Private company limited by shares | Live |
| CTECHI GROUP LIMITED | Private company limited by shares | Live |
| C-TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |