| ESTEC LIMITED | Private company limited by shares | Dissolved |
| ESTEC LIMITED | Private company limited by shares | Live |
| ESTEC ELECTRONICS COMPANY LIMITED | Private company limited by shares | Dissolved |
| ESTEC GROUP LIMITED | Private company limited by shares | Live |
| ESTEC INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| ESTEC INFORMATION COMPANY LIMITED | Private company limited by shares | Live |
| ESTEC INTERNATIONAL LIMITED | Private company limited by shares | Live |
| ESTEC INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| ESTech LIMITED | Private company limited by shares | Live |
| Estech Engineering Co., Limited | Private company limited by shares | Live |
| ES-TECH INDUSTRIAL LIMITED | Private company limited by shares | Live Commenced dormancy on 12-Mar-2014 |
| ES-TECH PRODUCTION LIMITED | Private company limited by shares | Live |