| FUSIONER LIMITED | Private company limited by shares | Dissolved |
| Fusionex Limited | Private company limited by shares | Live |
| Fusionex IOT Limited | Private company limited by shares | Live |
| FUSIONFLY LIMITED | Private company limited by shares | Live |
| FUSIONHUB CO-FACTORYING SPACE LIMITED | 擔保有限公司 | Live |
| Fusion-io Limited | Private company limited by shares | Live |
| Fusions Biotechnology Limited -The- | Private company limited by shares | Live |
| FUSIONS TECHNOLOGY CO., LIMITED | Private company limited by shares | Dissolved |
| FUSIONSILICON LIMITED | Private company limited by shares | Live |
| Fusionsky Technology Limited | | Live |
| Fusionstep Limited | Private company limited by shares | Live |
| Fusion-tech Limited | Private company limited by shares | Live |
| FusionX Trading Limited | | Live |
| FUSIT (HONGKONG) COMPANY LIMITED | Private company limited by shares | Dissolved |