| 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 |
| Efficienergy Limited | Private company limited by shares | Live |
| EFFICIENT LIMITED | Private company limited by shares | Dissolved |
| EFFICIENT LIMITED | Private company limited by shares | Dissolved |
| EFFICIENT LIMITED | Private company limited by shares | Dissolved |
| Efficient Limited | Private company limited by shares | Dissolved |
| EFFICIENT LIMITED | Private company limited by shares | Live |
| EFFICIENT WAY LIMITED | | Live |
| EFFICIENT CONSOLIDATOR ALLIANCE COMPANY LIMITED | Private company limited by shares | Live |
| Efficient In Asset Limited | | Live |
| EFFICIENT ENERGY TECHNOLOGIES AUSTRALASIA LIMITED | Private company limited by shares | Live |
| EFFICIENT TRADE BROKERS LIMITED | Private company limited by shares | Live |
| EFFICIENT BUSINESS LIMITED | Private company limited by shares | Live |
| CHINA INTERNET EFFICIENT FINANCE HOLDING LIMITED | Private company limited by shares | Live |
| HK EFFICIENT INDUSTRY GROUP CO., LIMITED | Private company limited by shares | Live |
| HK Efficient Technology Co., Limited | Private company limited by shares | Live |
| Efficient trading co., Limited | Private company limited by shares | Live |
| EFFICIENT COMMUNICATION CO., LIMITED | Private company limited by shares | Live |
| EFFICIENT CONSTRUCTION COMPANY LIMITED | Private company limited by shares | Dissolved |
| EFFICIENT CONSULTING LIMITED | Private company limited by shares | Live |
| EFFICIENT CONTRACTOR LIMITED | Private company limited by shares | Live |
| Efficient Power Conversion Limited | Private company limited by shares | Live |
| EFFICIENT DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| Efficient Development Limited | | Live |
| EFFICIENT PERFECTION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| EFFICIENT DISH WASHING LIMITED | Private company limited by shares | Live |
| Efficient Electronics Limited | Private company limited by shares | Live |
| Smart & Efficient Energy Group Co. Limited | Private company limited by shares | Live |
| ENERGY EFFICIENT & ECO SOLUTIONS LIMITED | Private company limited by shares | Live |
| EFFICIENT ENERGY SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| Energy Efficient Technologies Limited | Private company limited by shares | Live |
| EFFICIENT ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| EFFICIENT ENGINEERING CO., LIMITED | Private company limited by shares | Dissolved |
| EFFICIENT ELECTRONIC ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| EFFICIENT ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| HUDGENS ENERGY EFFICIENT EQUIPMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| VERDANT EFFICIENT FARMING LIMITED | Private company limited by shares | Live |
| Efficient Finance Holding Limited | Private company limited by shares | Live |
| EFFICIENT FORCE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| GLOBAL EFFICIENT LIMITED | Private company limited by shares | Live |
| Efficient Global Limited | Private company limited by shares | Live |
| Global Efficient Lighting Centre Limited | Private company limited by shares | Live |
| Efficient Global Projects Limited | Private company limited by shares | Live |
| Efficient Global Service Limited | Private company limited by shares | Live |
| EFFICIENT INNOVATION INVESTMENTS GROUP LIMITED | Private company limited by shares | Live |
| EFFICIENT SECURITY & GUARDS SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| EFFICIENT ENGINEERING (HK) LIMITED | Private company limited by shares | Live |
| EFFICIENT INDUSTRIAL (HK) LIMITED | | Live |
| EFFICIENT (HK) INDUSTRY LIMITED | Private company limited by shares | Live |
| EFFICIENT TECHNOLOGY (HK) Company Limited | Private company limited by shares | Live |
| G-CITY EFFICIENT ENERGY HOLDINGS LIMITED | Private company limited by shares | Live |
| HONEST & EFFICIENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| HONG KONG EFFICIENT CONSULTING LIMITED | Private company limited by shares | Live |
| EFFICIENT FRONTIER HONG KONG LIMITED | Private company limited by shares | Dissolved |
| EFFICIENT OFFICE (HONG KONG) LIMITED | Private company limited by shares | Live |
| HONGKONG EFFICIENT DELIVERY INTERNATIONAL CO. LIMITED | Private company limited by shares | Dissolved |
| HONGKONG POLY EFFICIENT FINANCE HOLDING LIMITED | Private company limited by shares | Live |
| HE Efficient Industry Group Limited | Private company limited by shares | Live |
| EFFICIENT INFORMATION SECURITY LIMITED | Private company limited by shares | Live |
| EFFICIENT INSTITUTE LIMITED | Private company limited by shares | Dissolved |