| MICROTRON LIMITED | Private company limited by shares | Live |
| ADVANCED MICROTRON COMPANY LIMITED | Private company limited by shares | Dissolved |
| Microtron-HK Limited | Private company limited by shares | Live |
| SMC MICROTRONIC COMPANY LIMITED | Private company limited by shares | Dissolved |
| MICROTRONIC ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| MICROTRONIC SECURITY SYSTEMS LIMITED | Private company limited by shares | Live |
| AMS MICROTRONICS LIMITED | Private company limited by shares | Live |
| INTEGRATED MICROTRONICS LIMITED | Private company limited by shares | Dissolved |