| INTERNATIONAL UNION OF AGARRATTAN ASSOCIATION LIMITED | Private company limited by shares | Live |
| CARE UNION COMPANY LIMITED | Private company limited by shares | Live |
| Happy Unique Health Investment Limited | Private company limited by shares | Live |
| Kong Lung Union Company Limited | Private company limited by shares | Live |
| RT UNI-SELECT COMPANY LIMITED | Private company limited by shares | Live |
| Union Exceet Investment and Trading Company Limited | Private company limited by shares | Live |
| UNIVERSAL KUI KEE ELECTRICAL COMPANY LIMITED | Private company limited by shares | Live |
| UNIQUE DESTINATIONS LIMITED | Private company limited by shares | Live |
| UNION BOILER WORKS CO., LIMITED | Private company limited by shares | Live |
| CHINA LANDROVER UNION LIMITED | Private company limited by shares | Live |
| Ruihai Union (HK) Co., Limited | Private company limited by shares | Live |
| UNIFIED INDUSTRIAL (HK) LIMITED | Private company limited by shares | Live |
| EASTER UNION TRADE LIMITED | Private company limited by shares | Live |
| TOP UNION INVESTMENTS (HK) LIMITED | Private company limited by shares | Live |
| UNION TRADE & LOGISTICS LIMITED | Private company limited by shares | Live |
| Asia Pacific Security Technology Innovation Union Limited | Private company limited by shares | Live |
| Union Capital Holding Limited | Private company limited by shares | Live |
| BAITIAN UNIVERSAL LIMITED | Private company limited by shares | Live |
| UNITED NATIONS RESEARCH PARK FOR HUMAN SURVIVAL LIMITED | Private company limited by shares | Live |
| Union Best Factory Limited | Private company limited by shares | Live |
| ONE BELT ONE ROAD UNION LIMITED | Private company limited by shares | Live |
| UNIFLYING FASHION APPARELS CO., LIMITED | Private company limited by shares | Live |
| China Nutrition Security Egg Union Co., Limited | Private company limited by shares | Live |
| UnionMed Trade Limited | Private company limited by shares | Live |
| HK UNION GOAL TRADING LIMITED | Private company limited by shares | Live |
| UNION KINGDOM ENGINEERING LIMITED | Private company limited by shares | Live |
| CHINA UNITED PETROLEUM CHEMICALS INTERNATIONAL TRADING COMPANY LIMITED | Private company limited by shares | Live |
| INTERNATIONAL GRAND UNION GROUP LIMITED | Private company limited by shares | Live |
| Uniplaza International Limited | Private company limited by shares | Live |
| Uniplaza Holdings Limited | Private company limited by shares | Live |
| United Infinity Limited | Private company limited by shares | Live |
| UNION PEACE INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION DYNAMIC LIMITED | Private company limited by shares | Live |
| UNIMAX SEALS COMPANY LIMITED | Private company limited by shares | Live |
| LaiChi United Limited | Private company limited by shares | Live |
| Smart Union Properties Limited | Private company limited by shares | Live |
| SKYLINK UNIVERSAL COMPANY LIMITED | Private company limited by shares | Live |
| Union Textile Development Limited | Private company limited by shares | Live |
| HONGKONG UNION THRIVE INDUSTRIAL LIMITED | Private company limited by shares | Live |
| CHINA ENERGY UNION HOLDINGS (H.K.) LIMITED | Private company limited by shares | Live |
| UNIROAM LIMITED | Private company limited by shares | Live |
| Universe Star Trading Company Limited | Private company limited by shares | Live |
| SUCCESS UNION ACCOUNTING SERVICES COMPANY LIMITED | Private company limited by shares | Live |
| HUGE UNION LIMITED | Private company limited by shares | Live |
| UNION JOINT LIMITED | Private company limited by shares | Live |
| UNIQUE FIRST LIMITED | Private company limited by shares | Live |
| UNI-SUCCESS INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION MARK ELECTRONICS LIMITED | Private company limited by shares | Live |
| UNITED INC. LIMITED | Private company limited by shares | Live |
| Eastern Union International Holding Limited | Private company limited by shares | Live |
| Cableplus Unionbridge Electronics Co., Limited | Private company limited by shares | Live |
| Sino Union Technologies International Limited | Private company limited by shares | Live |
| WISDOM UNITED TECHNOLOGY LIMITED | Private company limited by shares | Live |
| JIANGSHAN UNION CHEMICAL CO., LIMITED | Private company limited by shares | Live |
| UNION NEUROLOGY AND ORTHOLOGY LIMITED | Private company limited by shares | Live |
| Zobon United Investments Limited | Private company limited by shares | Live |
| UNION OASIS LIMITED | Private company limited by shares | Live |
| United Libro Gen Trade Co., Limited | Private company limited by shares | Live |
| NEW UNION SUCCESS LIMITED | Private company limited by shares | Live |
| UNION FLOW LIMITED | Private company limited by shares | Live |
| UNION BRIGHT CORPORATION LIMITED | Private company limited by shares | Live |
| MARK UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNIFYEX LIMITED | Private company limited by shares | Live |
| Union (H.K.) Capital Market Limited | Private company limited by shares | Live |
| Vast Universe Co., Limited | Private company limited by shares | Live |
| VEGA UNION LIMITED | Private company limited by shares | Live |
| Hong Kong Glory Universe Technology Company Limited | Private company limited by shares | Live |
| COSCO SHIPPING UNIVERSE LIMITED | Private company limited by shares | Live |
| HONGKONG GALAXY UNION COMPANY LIMITED | Private company limited by shares | Live |
| Global University Alumni Association Limited | Private company limited by shares | Live |
| ASHDALE UNIVERSAL LIMITED | Private company limited by shares | Live |
| UNITED WEALTH (ASIA) LIMITED | Private company limited by shares | Live |
| ELEMENTS UNIVERSAL LIMITED | Private company limited by shares | Live |
| UNIFY MOTOR LIMITED | Private company limited by shares | Live |
| HK UNION CREDIT LIMITED | Private company limited by shares | Live |
| UNION FIDELITY CONSTRUCTION ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| SANXIN UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Hong Kong Beauty Industry Union Limited | Company limited by guarantee | Live |
| Ultra Universe Fashion Limited | Private company limited by shares | Live |
| Ultra Universe Tourism Limited | Private company limited by shares | Live |
| UNIQUE SPEED LIMITED | Private company limited by shares | Live |
| SMARTEN UNION CO., LIMITED | Private company limited by shares | Live |
| HEALTH UNION (HONG KONG) LIMITED | Private company limited by shares | Live |
| SUN UNITED MOTOR LIMITED | Private company limited by shares | Live |
| UNION HOPE (HK) LIMITED | Private company limited by shares | Live |
| UNIMED COMPANY LIMITED | Private company limited by shares | Live |
| Unicompex Limited | Private company limited by shares | Live |
| Unique Art Studio Limited | Private company limited by shares | Live |
| UNIVERSAL HORIZON LIMITED | Private company limited by shares | Live |
| UNIFRAME LIMITED | Private company limited by shares | Live |
| UNITED GROUP HOLDING COMPANY LIMITED | Private company limited by shares | Live |
| 101 Uniform Company Limited | Private company limited by shares | Live |
| UNION ZHONGRUN (INTERNATIONAL) FOOD LIMITED | Private company limited by shares | Live |
| Unity (VHHH) Limited | Private company limited by shares | Dissolved |
| MONTROSE UNIVERSAL LIMITED | Private company limited by shares | Live |
| OCEAN UNITED CAPITAL LIMITED | Private company limited by shares | Live |
| Universal Solution Service Limited | Private company limited by shares | Live |
| UNION CARBON CO., LIMITED | Private company limited by shares | Live |
| China Riders Mutual Aid Union Group Limited | Private company limited by shares | Live |
| Universal Interactive Technology Limited | Private company limited by shares | Live |