| SINO UNION LOGISTICS LIMITED | Private company limited by shares | Live |
| UNIVERSAL STANDARD LIMITED | Private company limited by shares | Dissolved |
| UNISON PROJECT SOLUTIONS LIMITED | Private company limited by shares | Dissolved |
| PACIFIC UNION (HK) LIMITED | Private company limited by shares | Dissolved |
| UNI-1 TECHNOLOGY LIMITED | Private company limited by shares | Live |
| HONG KONG UNION PROPERTIES LIMITED | Private company limited by shares | Live |
| RIGHT UNION INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Live |
| RIGHT UNION ENTERPRISE LIMITED | Private company limited by shares | Live |
| TRINITY UNIVERSAL CO., LIMITED | Private company limited by shares | Dissolved |
| UNITED HERO INVESTMENT LIMITED | Private company limited by shares | Live |
| CHINA KENNEL UNION COMPANY LIMITED | Private company limited by shares | Live |
| PARK UNION (CHINA) LIMITED | Private company limited by shares | Live |
| SINO UNION INVESTMENT DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| World Ewriter Union Limited | Private company limited by shares | Dissolved |
| NOYA UNION CO., LIMITED | Private company limited by shares | Live |
| TEAM UNIVERSAL LIMITED | Private company limited by shares | Live |
| HK UNION (CHINA) ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| AJ UNITED CO., LIMITED | Private company limited by shares | Live |
| UNIVERSAL RIVER GROUP LIMITED | Private company limited by shares | Live |
| UNITED SHIPPING LINES LIMITED | Private company limited by shares | Live |
| UNITED FASHION LAB LIMITED | Private company limited by shares | Dissolved |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |