| POWERSTONE LIMITED | Private company limited by shares | Live |
| Powerstone Engineering Service Limited | Private company limited by shares | Live |
| Powerstone (Hong Kong) Limited | Private company limited by shares | Dissolved |
| Powerstone Industrial Co., Limited | Private company limited by shares | Live |
| NEW POWERSTONE INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| Powerstone Capital International Limited | Private company limited by shares | Live |
| POWERSTONE INTERNATIONAL GROUP LIMITED | Private company limited by shares | Live |
| Powerstone Marketing Limited | | Live |