| D-TEC MANAGEMENT (HK) LIMITED | Private company limited by shares | Dissolved |
| DTEC CASA INTERNATIONAL LIMITED | Private company limited by shares | Live |
| D-Tec International Trading Co., Limited | Private company limited by shares | Live |
| D-TEC SOLUTIONS CO. LIMITED | Private company limited by shares | Live |
| D-Tech Limited | Private company limited by shares | Live |
| D-TECH CIRCUIT CO., LIMITED | Private company limited by shares | Live |
| D-TECH INTERNATIONAL CORPORATION LIMITED | Private company limited by shares | Live |
| DTECH Electronic Limited | Private company limited by shares | Live |
| D-TECH HONGKONG ELECTRONICS LIMITED | Private company limited by shares | Live |
| D-TECH ENGINEERING CO. LIMITED | Private company limited by shares | Dissolved |
| D-TECH ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| DTECH ENVIRONMENTAL AND ENGINEERING CO. LIMITED | Private company limited by shares | Live |
| DTECH ENVIRONMENTAL LIMITED | Private company limited by shares | Live |
| DTECH INTERNATIONAL GROUP LIMITED | Private company limited by shares | Live |
| DTECH (H.K.) LIMITED | Private company limited by shares | Live |
| DTECH AUDIO (HONG KONG) COMPANY LIMITED | Private company limited by shares | Live |
| D-TECH INNOVATIONS LIMITED | Private company limited by shares | Dissolved |
| D-TECH INTERNATIONAL LIMITED | Private company limited by shares | Live |
| HK JIMMY DTECH CO., LIMITED | | Live |
| Dtech Solution Limited | Private company limited by shares | Live |
| D-tech Technology Company Limited | Private company limited by shares | Dissolved |
| DTECH TECHNOLOGY HK LIMITED | Private company limited by shares | Live |
| DTECH INTERNATIONAL TECHNOLOGY LIMITED | | Live |
| YUHAN DTECH (HK) LIMITED | Private company limited by shares | Live |