| ARCHTECH LIMITED | Private company limited by shares | Dissolved |
| ArchTech IT Consultancy Limited | Private company limited by shares | Live |
| E WISTAR ARCHTECH DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| ARCHTECH ELECTRONIC LIMITED | Private company limited by shares | Dissolved |
| ARCHTECH GROUP (ASIA) LIMITED | Private company limited by shares | Live |
| HARMONY ARCHTECH GROUP LIMITED | Private company limited by shares | Dissolved |
| ARCHTECH HONG KONG LIMITED | Private company limited by shares | Live |
| ARCHTECH PROFESSIONAL SYSTEM LIMITED | Private company limited by shares | Dissolved |