| SENTECH LIMITED | Private company limited by shares | Dissolved |
| SENTECH LIMITED | Private company limited by shares | Live |
| SENTECH CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| SENTECH DESIGN & CONTRACTING CO., LIMITED | Private company limited by shares | Live |
| SenTech Electronic Company Limited | Private company limited by shares | Live |
| SENTECH ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| SENTECH GROUP LIMITED | Private company limited by shares | Live |
| Sentech (HK) Limited | Private company limited by shares | Live |
| SENTECH Instruments (HK) Limited | Private company limited by shares | Dissolved |
| SENTECH INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| SENTECH INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| SENTECH PROPERTIES LIMITED | Private company limited by shares | Live Commenced dormancy on 18-Apr-2005 |
| SENTECH SYSTEM LIMITED | Private company limited by shares | Live |
| SENTECH TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| SENTECHS CO., LIMITED | Private company limited by shares | Live |