| Fosi Limited | Private company limited by shares | Live |
| Fosi International Co., Limited | Private company limited by shares | Live |
| Hong Kong Fosi Technology Co., Limited | | Live |
| FOSIL HK LIMITED | Private company limited by shares | Live |
| HK FOSIN LIMITED | Private company limited by shares | Dissolved |
| FOSING CATERING LIMITED | | Live |
| Guangzhou Fosion Trading Limited | | Live |
| Fosion (hk) Group Limited | Private company limited by shares | Live |
| Fosion Holding Limited | Private company limited by shares | Live |
| FOSION INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Fosion Steel Material Co., Limited | | Live |
| FOSIONWORLD TECHNOLOGY (HK) CO., LIMITED | Private company limited by shares | Dissolved |
| FOSITAN INTERNATIONAL LIMITED | Private company limited by shares | Live |
| FOSIZZA INDUSTRIAL LIMITED | | Live |