| TOSTA ENTERPRISE CO., LIMITED | Private company limited by shares | Live |
| Tosta Trade Limited | | Live |
| Tosta Trading Company Limited | Private company limited by shares | Live |
| TOSTAR LIMITED | Private company limited by shares | Live |
| TOSTAR INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| TOSTAR MARINE LIMITED | Private company limited by shares | Live |
| TOSTAR TECH (HK) LIMITED | | Live |
| TOSTAR TECHNOLOGY (HK) CO., LIMITED | Private company limited by shares | Live |
| Tostar International Trade Limited | Private company limited by shares | Live |
| TOSTAR INTERNATIONAL TRADING LIMITED | Private company limited by shares | Dissolved |