| FIRSTON LIMITED | Private company limited by shares | Dissolved |
| FIRSTON ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| FIRSTONE LIMITED | Private company limited by shares | Dissolved |
| FIRSTONE SKY LIMITED | Private company limited by shares | Live |
| FIRSTONE CHINA INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| FIRSTONE ELECTRIC CO., LIMITED | Private company limited by shares | Dissolved |
| FIRSTONE CORPORATE LIMITED | Private company limited by shares | Live |
| FIRSTONE ELECTRONICS COMPANY LIMITED | Private company limited by shares | Dissolved |
| FIRSTONIC TRADE INTERNATIONAL LIMITED | Private company limited by shares | Live |
| FIRSTONPOINT CONSULTANCY LIMITED | Private company limited by shares | Live |