| ELECTROCOM COMPANY LIMITED | Private company limited by shares | Dissolved |
| ELECTROCOM ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| ELECTROCOM GLOBAL SCIENCE & TECHNOLOGY LIMITED | Private company limited by shares | Live |
| ELECTROCOM SALES LIMITED | Private company limited by shares | Live |
| Electrocom Systems Limited | Private company limited by shares | Live |
| WAYSUN ELECTROCOM LIMITED | Private company limited by shares | Dissolved |
| ELECTROCOMPONENTS LIMITED | Private company limited by shares | Live |
| HK GAINER ELECTROCOMPONENTS CO., LIMITED | Private company limited by shares | Live |
| KEY OPERATION & ELECTROCOMPONENTS (HK) LIMITED | Private company limited by shares | Live |