| FOSE ENTERPRISE COMPANY LIMITED | Private company limited by shares | Live |
| FOSEC LIMITED | Private company limited by shares | Live |
| FOSEC HK Limited | Private company limited by shares | Live |
| FO-SEE LIMITED | Private company limited by shares | Live |
| FOSEN LIMITED | Private company limited by shares | Dissolved |
| FOSEN LIMITED | Private company limited by shares | Dissolved |
| FOSEN ELECTRONICS (HONG KONG) LIMITED | Private company limited by shares | Live |
| FOSEN (HK) COMPANY LIMITED | | Live |
| Fosen HongKong International Trade Co., Limited | Private company limited by shares | Live |
| FOSEN VALVE INDUSTRIES CO., LIMITED | Private company limited by shares | Live |
| FOSEN INDUSTRY COMPANY LIMITED | Private company limited by shares | Live |
| FOSEN INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| FOSEN TECHNOLOGY LIMITED | Private company limited by shares | Live |
| FOSEN TRADE (H. K.) LIMITED | Private company limited by shares | Dissolved |
| Fosend HK Limited | | Live |
| FOSENON (HONGKONG) ELECTRONICS CO., LIMITED | Private company limited by shares | Live |
| FOSETTA LIMITED | Private company limited by shares | Live |