| ZENITH E.C.S LIMITED | Private company limited by shares | Live |
| ECS7 LIMITED | Private company limited by shares | Live |
| ECSA Global Limited | Private company limited by shares | Live Commenced dormancy on 28-Oct-2015 |
| ecSAFE Holding Company Limited | Private company limited by shares | Live |
| ECSCENT LIMITED | Private company limited by shares | Live |
| ECSCO LIMITED | Private company limited by shares | Dissolved |
| ECSEM INDUSTRIAL CO., LIMITED | Private company limited by shares | Dissolved |
| ECSEND SERVICES LIMITED | Private company limited by shares | Live |
| ECSHIRT LIMITED | Private company limited by shares | Live |
| ECSHK Limited | Private company limited by shares | Live |
| ECSINONET.COM LIMITED | Private company limited by shares | Live |
| ECSK Investments Limited | | Live |
| ECSM Asia (HKG) Limited | Private company limited by shares | Dissolved |
| Ecsmobi Limited | Private company limited by shares | Live |
| ECSOFT LIMITED | Private company limited by shares | Live |
| ECSoft Technology (Hong Kong) Limited | Private company limited by shares | Live |
| ECSOURCE COMPONENTS CO., LIMITED | Private company limited by shares | Dissolved |
| ECSOURCE COMPONENTS CO., LIMITED | | Live |
| ECSports Limited | Private company limited by shares | Live |
| ECS-Print Limited | Private company limited by shares | Dissolved |
| ECSS Hong Kong Limited | Private company limited by shares | Live |
| ECSSL LIMITED | Private company limited by shares | Dissolved |
| ECST ASIA HOLDING LIMITED | Private company limited by shares | Dissolved |
| ECSTASY COMPANY LIMITED | Private company limited by shares | Dissolved |
| EVER ECSTASY LIMITED | Private company limited by shares | Live |
| ECSTASY INTERNATIONAL GROUP LIMITED | Private company limited by shares | Dissolved |
| ECSTATIC COMPANY LIMITED | Private company limited by shares | Live |
| ECSTATIC PARADISE LIMITED | Private company limited by shares | Dissolved |
| Ecstem International HK Limited | Private company limited by shares | Live |
| ECSTORM GROUP (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| ECSTUDY LIMITED | Private company limited by shares | Dissolved |
| ECSURE LIMITED | | Live |
| ECSY INTERNATIONAL LIMITED | Private company limited by shares | Live |
| ECSYSTEM LIMITED | Private company limited by shares | Live |