| A.P. UNION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION TREND ENGINEERING LIMITED | Private company limited by shares | Live |
| UNION METAL PRODUCTS INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Live |
| Creativity Unlimited Limited | Private company limited by shares | Dissolved |
| CHINESE CHRISTIAN UNIVERSITIES ALUMNI ASSOCIATION (HONG KONG) LIMITED | Company limited by guarantee | Live |
| VIVENDI UNIVERSAL PUBLISHING LIMITED | Private company limited by shares | Dissolved |
| UNIVERSE ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL TOURS HONG KONG LIMITED | Private company limited by shares | Dissolved |
| UNIVERSUM COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNITED ARM INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION MOTORS LIMITED | Private company limited by shares | Live |
| UNION HERO (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNION ALLIANCE LIMITED | Private company limited by shares | Dissolved |
| UNION TOP ENTERPRISES LIMITED | Private company limited by shares | Live |
| UNITED STAR PAPER & PLASTIC PRODUCTS FACTORY LIMITED | Private company limited by shares | Live |
| UNION HERO HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| MAIN UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| UNION WORLD INDUSTRIES LIMITED | Private company limited by shares | Live |
| UNION BASE INVESTMENTS LIMITED | Private company limited by shares | Live |
| SUCCESS UNIVERSE LIMITED | Private company limited by shares | Dissolved |
| UNITED VENTURE LIMITED | Private company limited by shares | Live |
| FIRST UNITED LIMITED | Private company limited by shares | Dissolved |
| UNITED GROUP (HK) IMP. & EXP. CO., LIMITED | Private company limited by shares | Live |
| TAK FRANCE UNDERGARMENT LIMITED | Private company limited by shares | Dissolved |
| EVER UNION GARMENTS LIMITED | Private company limited by shares | Dissolved |
| Uni-Concept (Apparel) Limited | Private company limited by shares | Dissolved |
| BEST UNION GROUP LIMITED | Private company limited by shares | Dissolved |
| WORLD SAGA OF BRITAIN & CHINESE UNITED COMM. ASSOCIATION CAPITAL LIMITED | Private company limited by shares | Dissolved |
| GREAT UNION CAP & BAG LIMITED | Private company limited by shares | Dissolved |
| UNION BROAD HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNICREAT INTERNATIONAL GROUP LIMITED | Private company limited by shares | Live |
| KK UNITED COMPANY LIMITED | Private company limited by shares | Live |
| Union Global Finance Management Company Limited | Private company limited by shares | Dissolved |
| MEGA UNION INTERNATIONAL INDUSTRIAL LIMITED | Private company limited by shares | Live |
| Unusual Productions (China) Limited | Private company limited by shares | Live |
| SINO UNION GARMENT LIMITED | Private company limited by shares | Live |
| UNION BASIC TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION HONEST (CHINA) LIMITED | Private company limited by shares | Live |
| MAIN UNION LIMITED | Private company limited by shares | Live |
| UNITED STRONG LIMITED | Private company limited by shares | Dissolved |
| SINGAPORE MAXIS UNIVERSAL CO., LIMITED | Private company limited by shares | Dissolved |
| UNISTAR (ASIA) LIMITED | Private company limited by shares | Live |
| UNIVERSE RESOURCES LIMITED | Private company limited by shares | Live |
| UNIKONG INVESTMENT CO., LIMITED | Private company limited by shares | Dissolved |
| Uni-Partners Holdings Limited | Private company limited by shares | Dissolved |
| WELL UNION INDUSTRIES COMPANY LIMITED | Private company limited by shares | Dissolved |
| HONGKONG TOP UNION TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| GREAT UNION LIMITED | Private company limited by shares | Live |
| H.W.H. UNITED CO. HK LIMITED | Private company limited by shares | Live |
| PACIFIC UNION MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| UNION CREATIVE INVESTMENT (HK) LIMITED | Private company limited by shares | Live |
| UNLIMITED INNOVATION LIMITED | Private company limited by shares | Live |
| UNION PROFIT TRADING LIMITED | Private company limited by shares | Dissolved |
| GLOBAL UNION INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SUPERB UNION INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| KIDS UNIVERSE ENTERPRISES LIMITED | Private company limited by shares | Live |
| SMART UNITED (ASIA) LIMITED | Private company limited by shares | Dissolved |
| GREENWOOD COSMETIC UNION CORPORATION LIMITED | Private company limited by shares | Dissolved |
| Union Electrical Works (Kwan Hoi) Limited | Private company limited by shares | Dissolved |
| UNIVERSAL CAPITAL (ASIA) LIMITED | Private company limited by shares | Dissolved |
| LONG UNITED INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNI-FAITH LIMITED | Private company limited by shares | Dissolved |
| UNITECH TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| UNIONWAY SHIPPING LIMITED | Private company limited by shares | Dissolved |
| UNITED ASIA PACIFIC LIMITED | Private company limited by shares | Dissolved |
| UNIQUE TRANSPORTATION LIMITED | Private company limited by shares | Live |
| CHINA UNITED ASSETS AND EQUITY EXCHANGE LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL STANDARD (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNION SKY HOLDINGS LIMITED | Private company limited by shares | Live |
| JS COMMODITY UNION LIMITED | Private company limited by shares | Live |
| UNISON INTERNATIONAL RESOURCES LIMITED | Private company limited by shares | Dissolved |
| UNITED CHANNEL LIMITED | Private company limited by shares | Live |
| UNIWING (HK) ELECTRONIC CO., LIMITED | Private company limited by shares | Dissolved |
| SILVER UNION ASIA LIMITED | Private company limited by shares | Live |
| UNION CHEST LIMITED | Private company limited by shares | Live |
| MEGE UNION (HONGKONG) INTERNATIONAL GROUP LIMITED | Private company limited by shares | Live |
| UNITED FOODSERVICE GROUP LIMITED | Private company limited by shares | Live |
| UNITAC INTERNATIONAL (HONG KONG) COMPANY LIMITED | Private company limited by shares | Live |
| PATRICK YUEN UNDERGROUND DETECTION COMPANY LIMITED | Private company limited by shares | Live |
| UNITED OIL (CHINA) COMPANY LIMITED | Private company limited by shares | Live |
| UNIVERSAL DRAGON INDUSTRIAL LIMITED | Private company limited by shares | Live |
| UNION INDUSTRIAL INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Unique Group (Asia) Limited -The- | Private company limited by shares | Live |
| WINNING UNIVERSAL LIMITED | Private company limited by shares | Dissolved |
| UNION FORTUNE INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNITED GAIN ASIA LIMITED | Private company limited by shares | Dissolved |
| UNION CHAMP ENGINEERING LIMITED | Private company limited by shares | Live |
| UNION GAIN TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| ORIENTAL UNISON LIMITED | Private company limited by shares | Live |
| UNISON CHEMICAL INDUSTRIAL CO., LIMITED | Private company limited by shares | Dissolved |
| UNION ENTERPRISE LIMITED | Private company limited by shares | Live |
| TARGET UNIVERSAL LIMITED | Private company limited by shares | Dissolved |
| MANCHESTER INTERNATIONAL UNION LIMITED | Private company limited by shares | Live |
| BAILIHUA UNDERWEAR CO., LIMITED | Private company limited by shares | Live |
| DELIGENT UNION SERVICES HOLDINGS LIMITED | Private company limited by shares | Live |
| UNION GROUP DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNIVERSAL TRADING AND INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| HONGKONG UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| KEEN UNION (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNION TRUTH LIMITED | Private company limited by shares | Dissolved |