| Efficient Electronic Technology Limited | Private company limited by shares | Live |
| HK EFFICIENT INTELLIGENT SORTING TECHNOLOGY LIMITED | Private company limited by shares | Live |
| EFFICIENT TRADING LIMITED | Private company limited by shares | Dissolved |
| EFFICIENT TRADING LIMITED | Private company limited by shares | Dissolved |
| EFFICIENT TRADING LIMITED | Private company limited by shares | Live |
| EFFICIENT TRAVEL COMPANY LIMITED | Private company limited by shares | Dissolved |
| EFFICIENT TYCOON LIMITED | | Live |
| EFFICIENT UNIFORM COMPANY LIMITED | Private company limited by shares | Live |
| A.ADVANTAGE EFFICIENT WORLD LIMITED | Private company limited by shares | Dissolved |
| Efficient World Trade Limited | Private company limited by shares | Dissolved |
| E-fficient Technology Worldwide Limited | Private company limited by shares | Live |
| EFFICIENTASK LIMITED | Private company limited by shares | Live |
| EfficientEnergy Technology Limited | Private company limited by shares | Dissolved |
| Efficientor Limited | Private company limited by shares | Live |