| Company Name | Type | Status |
|---|---|---|
| SAN TOSI TRADE COMPANY LIMITED | Private company limited by shares | Dissolved |
| HK TOSIA INDUSTRIAL LIMITED | Private company limited by shares | Live |
| Tosia Trading Co., Limited | Live | |
| TOSIEGER CO., LIMITED | Private company limited by shares | Live |
| TOSILON AUTOMATION CO LIMITED | Live | |
| TOSIM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| TOSINCE COMPANY LIMITED | Private company limited by shares | Live |
| TOSING INT'L (HK) DIGITAL PHOTOELECTRIC LIMITED | Private company limited by shares | Dissolved |