| CHINESE UNION CULTURAL EXCHANGE LIMITED | Private company limited by shares | Live |
| UNION FIELD TRADING DEVELOP LIMITED | Private company limited by shares | Live |
| Rising Union Asia Limited | Private company limited by shares | Live |
| Unitas Group Company Limited | Private company limited by shares | Live |
| Unibeam Limited | Private company limited by shares | Live |
| FIRST UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNITRONTECH CHINA COMPANY LIMITED | Private company limited by shares | Live |
| HK GLORY UNION TRADING LIMITED | Private company limited by shares | Live |
| Unicon Vision Technology Co., Limited | Private company limited by shares | Live |
| GREAT UNDERTAKING INFORMATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Underlyne Limited | Private company limited by shares | Live |
| NEW TRILLION UNION GLOBAL HOLDINGS LIMITED | Private company limited by shares | Live |
| UNI-TEAM INVESTMENTS LIMITED | Private company limited by shares | Live |
| Universal Investigation Engineering Limited | Private company limited by shares | Live |
| INTERNATIONAL EXTREME STUNTS UNION LIMITED | Private company limited by shares | Live |
| Leader Uni-Tech (HK) Co., Limited | Private company limited by shares | Live |
| OSHER UNIVERSAL LIMITED | Private company limited by shares | Live |
| CHINA FINANCIAL LEASING UNION DEVELOPMENT COMPANY LIMITED | Private company limited by shares | Live |
| GRAND UNION CREATION LIMITED | Private company limited by shares | Live |
| UNION CAPITAL INVESTMENT LIMITED | Private company limited by shares | Live |
| UNVERSAL SURPLUS TRADING DEVELOP LIMITED | Private company limited by shares | Live |
| UNION SPORTS CO., LIMITED | Private company limited by shares | Live |
| UNION DEVELOPMENT INTERNATIONAL TRADE LIMITED | Private company limited by shares | Live |
| ASIA PACIFIC SPORTS UNION FOUNDATION LIMITED | Private company limited by shares | Live |
| ASIA PACIFIC EDUCATION UNION FOUNDATION LIMITED | Private company limited by shares | Live |
| Universal United Supply Chain Limited | Private company limited by shares | Live |
| UNIVERSAL NICE LIMITED | Private company limited by shares | Live |
| UNIQUE CHAMP LIMITED | Private company limited by shares | Live |
| UniD Limited | Private company limited by shares | Live |
| UNITY WINNER ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| UNIPAT TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Neo Sino Union Consultant Limited | Private company limited by shares | Live |
| UNITECH INTERNATIONAL TRADING LIMITED | Private company limited by shares | Live |
| RICH UNION INTERNATIONAL CAPITAL LIMITED | Private company limited by shares | Live |
| TOP UNION ENTERPRISE LIMITED | Private company limited by shares | Live |
| UNIQUE JOY LIMITED | Private company limited by shares | Live |
| United AG Limited | Private company limited by shares | Live |
| UNION HONOR CORPORATE LIMITED | Private company limited by shares | Live |
| UNIQUE SERVICE CARE LIMITED | Private company limited by shares | Live |
| SURPLUS UNION TRADING DEVELOP LIMITED | Private company limited by shares | Live |
| UNITED HEALTH GOODS CO. LIMITED | Private company limited by shares | Live |
| Union Smart Technology Co., Limited | Private company limited by shares | Live |
| Universal SpaEquip (Asia) Limited | Private company limited by shares | Live |
| Universe Cloud Technology Limited | Private company limited by shares | Live |
| UNIVERSE HORIZON LIMITED | Private company limited by shares | Live |
| ENERGY UNION LIMITED | Private company limited by shares | Live |
| CREATIVE CENTURY UNION LIMITED | Private company limited by shares | Live |
| UNION STRONG CORPORATION LIMITED | Private company limited by shares | Live |
| CHINA UNION JEWELRY APPRAISAL LIMITED | Private company limited by shares | Live |
| UNIQUE KEY LIMITED | Private company limited by shares | Live |
| UNISON DIGITAL ENTERTAINMENT SYSTEM COMPANY LIMITED | Private company limited by shares | Live |
| JM UNIVERSAL CO., LIMITED | Private company limited by shares | Live |
| UNIVERSAL 21 CENTURY LIMITED | Private company limited by shares | Live |
| UNION SEA LIMITED | Private company limited by shares | Live |
| Union Sky Trading Co., Limited | Private company limited by shares | Live |
| Union Win Food Industry Co., Limited | Private company limited by shares | Live |
| UNITED MACHINING COMPANY LIMITED | Private company limited by shares | Live |
| United Finance Holding Group Limited | Private company limited by shares | Live |
| France Wine Union Holdings Group Limited | Private company limited by shares | Live |
| United Sense Group Limited | Private company limited by shares | Live |
| UNITED DRY CLEANING LIMITED | Private company limited by shares | Live |
| WORLD PROFESSIONAL BOXING UNION LIMITED | Private company limited by shares | Live |
| UNIWO TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| Ever Union Group Limited | Private company limited by shares | Live |
| UNIQUE TIRE CO., LIMITED | Private company limited by shares | Live |
| UNITED GLORY ENTERPRISES LIMITED | Private company limited by shares | Live |
| FAME UNION INVESTMENT LIMITED | Private company limited by shares | Live |
| JIANG SU TRIPLE SUN UNITED SCIENCE TECHNOLOGIES CO., LIMITED | Private company limited by shares | Live |
| UNICORP Limited | Private company limited by shares | Live |
| Union Pacific Aviation International Group Limited | Private company limited by shares | Live |
| KINGFORD UNIVERSAL LIMITED | Private company limited by shares | Live |
| JD Universal Co., Limited | Private company limited by shares | Live |
| Vantage Union Limited | Private company limited by shares | Live |
| Hong Kong Aviation Christian Union Limited | Company limited by guarantee | Live |
| UNION BRIGHTEN TRADING DEVELOP LIMITED | Private company limited by shares | Live |
| UNION VANTAGE LIMITED | Private company limited by shares | Live |
| EVER UNION LIMITED | Private company limited by shares | Live |
| UNION SENSE INVESTMENTS LIMITED | Private company limited by shares | Live |
| PT UNION LIMITED | Private company limited by shares | Live |
| STRONG UNION TRADING DEVELOP LIMITED | Private company limited by shares | Live |
| UN-FOUND FREIGHT SERVICE (HK) CO., LIMITED | Private company limited by shares | Live |
| LUCKY LINK UNITED HK LIMITED | Private company limited by shares | Live |
| DIGITAL MEDIA UNION GROUP LIMITED | Private company limited by shares | Live |
| UNION SHINE LIMITED | Private company limited by shares | Live |
| UNISON DEVELOPMENT LIMITED | Private company limited by shares | Live |
| New Union Textile Co., Limited | Private company limited by shares | Live |
| UNIMED PTY LIMITED | Private company limited by shares | Live Commenced dormancy on 08-Dec-2016 |
| FRIENDS UNION TRADING CO., LIMITED | Private company limited by shares | Live |
| Union Express Tax Rebates Services Limited | Private company limited by shares | Live |
| Union Bright International Limited | Private company limited by shares | Live |
| BEST UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| UNIVERSAL SUCCESS LIMITED | Private company limited by shares | Live |
| China Universe Construction Co., Limited | Private company limited by shares | Live |
| UNIVERSE TRADING CO., LIMITED | Private company limited by shares | Live |
| Thomson Union Academic Press Limited | Private company limited by shares | Live |
| UNIVERSAL OPT HK LIMITED | Private company limited by shares | Live |
| UNION SURPLUS DEVELOPMENT INTERNATIONAL LIMITED | Private company limited by shares | Live |
| US UNION DATA (CHINA) LIMITED | Private company limited by shares | Live |
| UNICHEM INDUSTRY LIMITED | Private company limited by shares | Live |
| UNIVERSE CASTLE TECHNOLOGY LIMITED | Private company limited by shares | Live |