| TOPAS ELECTRONICS (HONG KONG) LIMITED | Private company limited by shares | Live |
| TOPAS GROUP LIMITED | | Live |
| TOPAS INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| TOPASIA LIMITED | Private company limited by shares | Live |
| TOP-ASIA INVESTMENT HOLDING LIMITED | Private company limited by shares | Dissolved |
| TOPASIA INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| ORIENTAL TOPASIA INVESTMENTS LIMITED | Private company limited by shares | Live |
| TOPASIA PACIFIC LIMITED | Private company limited by shares | Dissolved |
| TOPASIA PACIFIC LIMITED | Private company limited by shares | Live |
| TOPASIA RESOURCES LIMITED | Private company limited by shares | Dissolved |
| TOPASIA SHIPPING LIMITED | Private company limited by shares | Dissolved |
| TOPASIA SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| TopAsiaTops Limited | Private company limited by shares | Live |
| TOPASS INDUSTRIAL LIMITED | Private company limited by shares | Live |
| TOPASS TECHNOLOGY LIMITED | Private company limited by shares | Live |