| SINTEC LIMITED | Private company limited by shares | Live |
| SINTEC HK Limited | Private company limited by shares | Live |
| SINTEC ASIA COMPANY LIMITED | Private company limited by shares | Dissolved |
| SINTEC HOLDING CO., LIMITED | Private company limited by shares | Live |
| SINTEC CONSTRUCTION LIMITED | Private company limited by shares | Live |
| SINTEC CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| SINTEC DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| SINTEC FINANCE LIMITED | Private company limited by shares | Dissolved |
| SINTEC GLASS MACHINERY CO., LIMITED | | Live |
| Sintec (HK) Investment Development Limited | Private company limited by shares | Dissolved |
| Hong Kong Sintec Trading Limited | Private company limited by shares | Live |
| Sintec Electronics Technology (Hongkong) Co., Limited | Private company limited by shares | Live |
| Sintec Industrial Co., Limited | Private company limited by shares | Live |
| SINTEC INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| SINTEC INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| Sintec International Co., Limited | Private company limited by shares | Live |
| SINTEC INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SINTEC METAL FABRICATION LIMITED | Private company limited by shares | Live |
| NISHIMATSU SINTEC CONSTRUCTION LIMITED | Private company limited by shares | Dissolved |
| SINTEC PIPE REVIVING LIMITED | Private company limited by shares | Dissolved |
| SINTEC TECHNOLOGY LIMITED | Private company limited by shares | Live |
| SINTEC UPVC WINDOWS AND DOORS COMPANY LIMITED | Private company limited by shares | Dissolved |
| SINTECH ECC LIMITED | Private company limited by shares | Dissolved |
| SINTECH ASIA LIMITED | Private company limited by shares | Dissolved |
| SINTECH (ASIA) LIMITED | Private company limited by shares | Dissolved |
| AL SINTECH CAPITAL LIMITED | Private company limited by shares | Live |