| TRI-TECH LIMITED | Private company limited by shares | Dissolved |
| TRITECH LIMITED | Private company limited by shares | Dissolved |
| TRITECH AUTOMATION LIMITED | Private company limited by shares | Live |
| Tri-Tech Chem Company Limited | Private company limited by shares | Live |
| TRITECH COMPUTERS LIMITED | Private company limited by shares | Dissolved |
| TRI-TECH CORPORATION LIMITED | Private company limited by shares | Dissolved |
| TRITECH DISTRIBUTION LIMITED | Private company limited by shares | Live |
| TRITECH ELECTRONICS CO. LIMITED | Private company limited by shares | Live |
| TRITECH ELECTRONICS MFY LIMITED | Private company limited by shares | Live |
| TRITECH ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| TRITECH ENGINEERING LIMITED | Private company limited by shares | Live |
| TRITECH ENGINEERING (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| Tritech Environment Technology Company Limited | Private company limited by shares | Live |
| TRITECH MEDICAL EQUIPMENT COMPANY LIMITED | Private company limited by shares | Live |
| TRITECH (HK) COMPANY LIMITED | Private company limited by shares | Dissolved |
| Tri-Tech Industrial (HK) Limited | Private company limited by shares | Live |
| TRITECH COMPANY SHARE (HK) CO., LIMITED | Private company limited by shares | Live |
| TRITECH TECHNOLOGIES (HK) CO., LIMITED | Private company limited by shares | Live |
| TRITECH HOLDINGS LIMITED | Private company limited by shares | Live |
| TRITECH INDUSTRIAL LIMITED | Private company limited by shares | Live |
| TRI-TECH INTERNATIONAL LIMITED | Private company limited by shares | Live |
| TRITECH INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| TRITECH INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| TRI-TECH INTERNATIONAL PACKAGING (PRC) LIMITED | Private company limited by shares | Dissolved |
| TRI-TECH RESOURCES INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Tri-Tech Systems International Limited | Private company limited by shares | Live |
| TRI-TECH METALS COMPANY LIMITED | Private company limited by shares | Dissolved |
| Tri-Tech Ocean Limited | | Live |
| TRITECH ORIENTAL LIMITED | Private company limited by shares | Live |
| TRI-TECH RESOURCES LIMITED | Private company limited by shares | Dissolved |
| TRI-TECH SOLUTIONS LIMITED | Private company limited by shares | Dissolved |
| TRI-TECH SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| TRITECH TECHNOLOGIES CO., LIMITED | Private company limited by shares | Dissolved |
| TRITECH TECHNOLOGY LIMITED | Private company limited by shares | Live |
| TRITECHNI LIMITED | Private company limited by shares | Live |