| SERF Electronics Co., Limited | Private company limited by shares | Live |
| SERFAIR LIMITED | Private company limited by shares | Live |
| Serfay Tech Co., Limited | | Live |
| SERFAY INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| Serfert (China) Co., Limited | Private company limited by shares | Live |
| SERFFICES COMPANY LIMITED | Private company limited by shares | Live |
| SERFIELD ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| SERFILCO-SOLAR COMPANY LIMITED | Private company limited by shares | Dissolved |
| Serfirst Enterprise Limited | Private company limited by shares | Live |
| SERFORD LIMITED | Private company limited by shares | Dissolved |
| SERFORD ENGINEERING LIMITED | Private company limited by shares | Dissolved |