| ec-heat Limited | | Live |
| E-Check Service Company Limited | | Live |
| eCheck-In Company Limited | Private company limited by shares | Live |
| ECHEERS HK COMPANY LIMITED | Private company limited by shares | Live |
| ECHELER LIMITED | Private company limited by shares | Live |
| ECHELON LIMITED | Private company limited by shares | Live |
| Echelon App Limited | | Live |
| Echem Incorporation Limited | Private company limited by shares | Live |
| ECHEM TECH LIMITED | Private company limited by shares | Live |
| Echemi Holding Company Limited | Private company limited by shares | Live |
| E-CHEMICAL (HONG KONG) LIMITED | Private company limited by shares | Live |
| HK Echen Limited | | Live |
| ECHEN TECH CO., LIMITED | Private company limited by shares | Live |
| ECHEN TECHNOLOGY DEVELOPMENT LIMITED | Private company limited by shares | Live |
| Echen trading (HK) CO., Limited | Private company limited by shares | Live |
| HONGKONG ECHEN INDUSTRIAL LIMITED | | Live |
| Jiangxi Echen Industry Co., Limited | Private company limited by shares | Live |
| ECHEN INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| ECHEN INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Live |
| E-CHEN INTERNATIONAL (HK) LIMITED | Private company limited by shares | Live |
| E-CHEN INTERNATIONAL (HK) HOLDING LIMITED | Private company limited by shares | Live |
| Echen Asia Pacific Limited | Private company limited by shares | Live |
| ECHEN SOURCING CO., LIMITED | | Live |