| SURTAT LIMITED | Private company limited by shares | Dissolved |
| SURTEC HONG KONG LIMITED | Private company limited by shares | Live |
| SURTEC INDUSTRIES LIMITED | Private company limited by shares | Live |
| SURTEES ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| SURTEK INVESTMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| SURTEST LIMITED | Private company limited by shares | Dissolved |
| SURTON LIMITED | Private company limited by shares | Live |
| SHENZHEN SURTOP TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| SURTSEY LIMITED | Private company limited by shares | Dissolved |