| MAGIC UNION LIMITED | Private company limited by shares | Live |
| UNION FAITH TECHNOLOGY DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION WINNER DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNIQUE GROWTH INVESTMENTS LIMITED | Private company limited by shares | Live |
| UNION HILL LIMITED | Private company limited by shares | Dissolved |
| UNION SHIPS YARDS SERVICES LIMITED | Private company limited by shares | Live |
| VANTAGE UNION LIMITED | Private company limited by shares | Dissolved |
| ON UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION ON DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION WEALTH DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION GAIN ENTERPRISES LIMITED | Private company limited by shares | Live |
| UNION GREAT ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| Emperor Universal Trading Limited | Private company limited by shares | Dissolved |
| UNITED WEALTH INC. LIMITED | Private company limited by shares | Live |
| UNION WELL TRADING LIMITED | Private company limited by shares | Live |
| UNION MARK INTERNATIONAL LIMITED | Private company limited by shares | Live |
| ON UNION INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| NEW UNION LIMITED | Private company limited by shares | Dissolved |
| UNITED ASIA TRADING LIMITED | Private company limited by shares | Live |
| UNION PLANET LIMITED | Private company limited by shares | Live |
| UNION TACTIC LIMITED | Private company limited by shares | Live |
| UNION BEST INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION PROFIT INTERNATIONAL LIMITED | Private company limited by shares | Live |
| ALLIED UNION (H.K.) LIMITED | Private company limited by shares | Live |
| HONG KONG UNIVERSE INDUSTRIAL LIMITED | Private company limited by shares | Live |
| UNION EXCEL INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Unity Capital Limited | Private company limited by shares | Live |
| Universe Renewable Energy Limited | Private company limited by shares | Live |
| HONGKONG HEBEI COMMERCIAL UNION LIMITED | Private company limited by shares | Live |
| LITTLE UNIVERSE INTERNATIONAL EDUCATION MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL ACCORD LIMITED | Private company limited by shares | Dissolved |
| CHINESE UNION OF COMMERCE LIMITED | Private company limited by shares | Live |
| International Buddhist Union Limited | Company limited by guarantee | Live |
| United LC Limited | Private company limited by shares | Dissolved |
| UNION POWER TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| UNION INTERNATIONAL LOGISTICS (ASIA) LIMITED | Private company limited by shares | Dissolved |
| UNIQUE JOY LIMITED | Private company limited by shares | Dissolved |
| UNION GLOBE INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNIFIED OUTDOOR PRODUCTS LIMITED | Private company limited by shares | Live |
| UNION FORTUNE (ASIA) LIMITED | Private company limited by shares | Dissolved |
| UNION SUCCESS (ASIA) LIMITED | Private company limited by shares | Live |
| ACE UNIVERSE INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Uninno Limited | Private company limited by shares | Live |
| UNIQOX LIMITED | Private company limited by shares | Live |
| GREAT UNIVERSE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| TROIKA UNION INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| UNIVERSAL ENTERTAINMENT LIMITED | Private company limited by shares | Live |
| IDEA UNIVERSAL LIMITED | Private company limited by shares | Live |
| AR-SC UNION CO., LIMITED | Private company limited by shares | Dissolved |
| UNITRANS CORP LIMITED | Private company limited by shares | Live |
| UNIVERSAL ENTERTAINMENT GROUP LIMITED | Private company limited by shares | Live |
| UNI-NAVIGATION MANAGEMENT CONSULTING LIMITED | Private company limited by shares | Dissolved |
| Uni-Supreme HK Limited | Private company limited by shares | Dissolved |
| DRAGON UNITED TRADING LIMITED | Private company limited by shares | Live |
| HTM UNION CO., LIMITED | Private company limited by shares | Live |
| UNITED BUSINESS ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| UNION CENTURY CONSULTANTS LIMITED | Private company limited by shares | Live |
| Uniquebelts Limited | Private company limited by shares | Dissolved |
| UNIVERSAL JADE LIMITED | Private company limited by shares | Dissolved |
| World uniqueen International Trade Co., Limited | Private company limited by shares | Live |
| UNIQUENESS FASHION (HONG KONG) LIMITED | Private company limited by shares | Live |
| CHINA UNION SPUNK LIMITED | Private company limited by shares | Live |
| B&R UNIVERSAL LIMITED | Private company limited by shares | Dissolved |
| CHINA UNITED EQUITY EXCHANGE AND INVEST GROUP LIMITED | Private company limited by shares | Dissolved |
| TALENT UNION (HONG KONG) INVESTMENTS LIMITED | Private company limited by shares | Live |
| CWZ Metal Union Limited | Private company limited by shares | Dissolved |
| UNION ENERGY INVESTMENT LIMITED | Private company limited by shares | Live |
| UNI-IMAGE INDUSTRIAL LIMITED | Private company limited by shares | Live |
| HCA UNITED LIMITED | Private company limited by shares | Live |
| ADshare Union HK Limited | Private company limited by shares | Live |
| Universal Property Investment Limited | Private company limited by shares | Live |
| Union Rich Property Investment Limited | Private company limited by shares | Live |
| CHINA MICE INDUSTRY UNION LIMITED | Private company limited by shares | Dissolved |
| GULF UNION MINERAL RESOURCES CO., LIMITED | Private company limited by shares | Dissolved |
| Universal Trade Link Limited | Private company limited by shares | Live |
| UNION RISE INTERNATIONAL HONGKONG CO., LIMITED | Private company limited by shares | Live |
| UNIBANCA MEDIA HONGKONG LIMITED | Private company limited by shares | Live |
| UNIVERSAL E-BUSINESS SOLUTIONS LIMITED | Private company limited by shares | Dissolved |
| Unified Trading Group, Limited | Private company limited by shares | Dissolved |
| KnK Universal Limited | Private company limited by shares | Dissolved |
| NEW UNION POWER LIMITED | Private company limited by shares | Dissolved |
| CHINA AUTOMOTIVE INDUSTRY UNION RESEARCH LIMITED | Private company limited by shares | Dissolved |
| INJAZ UNIVERSAL COMPANY LIMITED | Private company limited by shares | Live |
| UNION REPAIR TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Swift Union International Commerce Limited | Private company limited by shares | Live |
| UNIHANK OPTICS-ELECTRICAL TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| UNIVERSE BUSINESS COMPANY LIMITED | Private company limited by shares | Live |
| CHINA UNIPIPE COMPANY LIMITED | Private company limited by shares | Live |
| Union Wealth Technology Limited | Private company limited by shares | Dissolved |
| Wai Union Engineering & Trading Company Limited | Private company limited by shares | Live |
| AFRICAN UNION FOR EXPORT AND TRADING CO., LIMITED | Private company limited by shares | Dissolved |
| JAPAN UNION OIL (CHINA) LIMITED | Private company limited by shares | Live |
| Buddhism Cultural Foundation Union Limited | Private company limited by shares | Dissolved |
| UNIVERSAL-UNITE DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION CREATION INTERNATIONAL DEVELOPMENT LIMITED | Private company limited by shares | Live |
| WORLD UNION VISION GROUP LIMITED | Private company limited by shares | Live |
| STEM UNION INTERNATIONAL GROUP LIMITED | Private company limited by shares | Dissolved |
| GERMANY DERATON UNITED TECHNOLOGIES GROUP CO., LIMITED | Private company limited by shares | Live |
| KALMAR UNION DENMARK HOME CO., LIMITED | Private company limited by shares | Live |
| China Union Industrial (Asia) Limited | Private company limited by shares | Live |