| AMPTEC LIMITED | Private company limited by shares | Dissolved |
| AMPTEC LIMITED | Private company limited by shares | Live |
| AMPTEC CENTURY LIMITED | Private company limited by shares | Live |
| Amptech International Limited | | Live |
| AMPTEK COMPANY LIMITED | Private company limited by shares | Dissolved |
| AMPTEK LIMITED | Private company limited by shares | Dissolved |
| AMPTHILL LIMITED | Private company limited by shares | Dissolved |
| AMPTOM LIMITED | Private company limited by shares | Live |
| AMPTON HK LIMITED | Private company limited by shares | Live |
| Ampton Marine Limited | Private company limited by shares | Live |
| AMPTS Investment Limited | Private company limited by shares | Dissolved |
| AMPTYCO CO., LIMITED | Private company limited by shares | Live |