| TOPJET LIMITED | Private company limited by shares | Dissolved |
| TOPJET AVIATION LIMITED | Private company limited by shares | Live |
| TOPJET SHIPPING CO., LIMITED | Private company limited by shares | Live |
| Topjet Technology Co., Limited | Private company limited by shares | Live |
| TOPJET DEVELOPMENT LIMITED | Private company limited by shares | Live |
| TOPJET ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| TOPJET ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| TOPJET ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| TOPJET HONG KONG LIMITED | Private company limited by shares | Dissolved |
| TOPJET INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| TOPJET INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| TOPJET Optoelectronic International Limited | | Live |
| TOPJET INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| TOPJET INVESTMENTS LIMITED | Private company limited by shares | Live |
| TOPJET OPTOELECTRONIC CO LIMITED | Private company limited by shares | Live |
| TOPJET SCIENCE & TECHNOLOGY (H.K.) COMPANY LIMITED | Private company limited by shares | Live |