| BIO EFFICIENCY LIMITED | Private company limited by shares | Dissolved |
| IT EFFICIENCY LIMITED | Private company limited by shares | Live |
| EFFICIENCY LIMITED | Private company limited by shares | Live |
| Efficiency Aesthetics Limited | | Live |
| Efficiency Aggregators Limited | Private company limited by shares | Live |
| POWER EFFICIENCY ASIA LIMITED | Private company limited by shares | Dissolved |
| Asian Efficiency Limited | Private company limited by shares | Live |
| BELLING EFFICIENCY TESTING LAB LIMITED | Private company limited by shares | Live |
| BUSINESS EFFICIENCY LIMITED | Private company limited by shares | Live |
| Business Efficiency (H.K.) Limited | Private company limited by shares | Dissolved |
| EFFICIENCY INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| Easy and Efficiency Commercial Company Limited | Private company limited by shares | Live |
| EFFICIENCY CONCEPT LIMITED | Private company limited by shares | Dissolved |
| EFFICIENCY MATTERS CORPORATION LIMITED | Private company limited by shares | Live |
| EFFICIENCY CREATION LIMITED | Private company limited by shares | Live |
| Electronic Efficiency Limited | Private company limited by shares | Live Ceased dormancy on 22-Apr-2016 |
| ENERGY EFFICIENCY COMPANY (ASIA) LIMITED | Private company limited by shares | Live |
| EEM ENERGY EFFICIENCY MANAGEMENT CONSULTING CO., LIMITED | Private company limited by shares | Dissolved |
| ENGINEERED ENERGY EFFICIENCY MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| PANDA POWER ENERGY EFFICIENCY CONSULTANT LIMITED | Private company limited by shares | Live |
| SHIELD ENERGY EFFICIENCY LIMITED | Private company limited by shares | Live |
| SUPERB ENERGY EFFICIENCY LIMITED | Private company limited by shares | Live |
| ENERGY EFFICIENCY TECHNOLOGIES (HK) LIMITED | Private company limited by shares | Dissolved |
| EFFICIENCY ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| Export Efficiency Co., Limited | Private company limited by shares | Live |
| GLOBAL EFFICIENCY LIMITED | Private company limited by shares | Live |
| GLORY EFFICIENCY LIMITED | Private company limited by shares | Dissolved |
| GRAND EFFICIENCY LIMITED | Private company limited by shares | Dissolved |
| GREAT EFFICIENCY GLOBAL LIMITED | Private company limited by shares | Live |
| Great Efficiency International Limited | Private company limited by shares | Live |
| GreenStream Energy Efficiency Investments Limited | Private company limited by shares | Live |
| EFFICIENCY GROUP CO., LIMITED | Private company limited by shares | Live |
| EFFICIENCY INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| JunDu Efficiency Holding Group Limited | Private company limited by shares | Live |
| FKFM Management Efficiency Group Limited | Private company limited by shares | Live |
| Top Efficiency Management Investment Limited | | Live |
| MAXI EFFICIENCY LIMITED | Private company limited by shares | Dissolved |
| EFFICIENCY MEDICAL PRODUCTS COMPANY LIMITED | Private company limited by shares | Live |
| MEGA EFFICIENCY INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| National Wealth Energy Efficiency Fund Limited | Private company limited by shares | Live |
| ONLINE EFFICIENCY LIMITED | Private company limited by shares | Live |
| EFFICIENCY BUSINESS PRINTING CO., LIMITED | Private company limited by shares | Dissolved |
| EFFICIENCY PROPERTY INVESTMENT COMPANY LIMITED | Private company limited by shares | Live |
| EIS Efficiency International Solution Limited | Private company limited by shares | Live |
| EFFICIENCY SYSTEM & COMPANY LIMITED | Private company limited by shares | Dissolved |
| EFFICIENCY INTERNATIONAL TRADE LIMITED | Private company limited by shares | Live |
| EFFICIENCY TRADING CO., LIMITED | Private company limited by shares | Live |
| EFFICIENCY TRANSPORTATION COMPANY LIMITED | Private company limited by shares | Live |
| EFFICIENCY UNDERWRITING AGENCIES LIMITED | Private company limited by shares | Dissolved |