| TRIO-PROFIT (HEALTH CARE) COMPANY LIMITED | Private company limited by shares | Dissolved |
| Trioptics Hong Kong Limited | Private company limited by shares | Live |
| TriOrca Limited | Private company limited by shares | Live |
| TRIORICH LIMITED | Private company limited by shares | Dissolved |
| TRIORICH INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| TRI-ORIENT INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| TRI-ORIENT SHIPPING LIMITED | Private company limited by shares | Live |
| TRI-ORIENT TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| TRI-ORIGIN PAPER PRODUCTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| TRIORING LIMITED | Private company limited by shares | Dissolved |
| TRIORTHO LIMITED | | Live |
| CHINA TRIOS AGRI-DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| Triosapience Company Limited | Private company limited by shares | Live |
| TRIOSCENTS LIMITED | Private company limited by shares | Live |
| TRIOSIGMA LIMITED | Private company limited by shares | Live |
| TRIOSTARS TRADING LIMITED | Private company limited by shares | Live |
| TRIOSUN INVESTMENT LIMITED | Private company limited by shares | Live |
| Triosun Technology Limited | | Live |
| TRIOTECH LIMITED | Private company limited by shares | Live |
| Triotech Asia (Hong Kong) Limited | Private company limited by shares | Live |
| TRIOTEK LIMITED | Private company limited by shares | Live |
| TRIOTEX COMPANY LIMITED | Private company limited by shares | Dissolved |
| TRIOTEX LIMITED | Private company limited by shares | Dissolved |
| TRIOTEX EMBROIDERY & DESIGN COMPANY LIMITED | Private company limited by shares | Dissolved |
| TRIOTRONIK HK LIMITED | Private company limited by shares | Live |
| TRIOVATION SURGICAL COMPANY LIMITED | Private company limited by shares | Live |
| TRIOWAY LIMITED | Private company limited by shares | Dissolved |
| TRIOWELL LIMITED | Private company limited by shares | Dissolved |
| TRIOWELL AUTOMATIC SYSTEM LIMITED | Private company limited by shares | Live |
| TRIOWILL LIMITED | Private company limited by shares | Dissolved |
| TRIOY COMPANY LIMITED | Private company limited by shares | Live |
| TRIOYORK LIMITED | Private company limited by shares | Dissolved |
| Trioz Limited | Private company limited by shares | Live |