| UNION CROWN (HK) LIMITED | Private company limited by shares | Live |
| OCEAN UNION (CHINA) LIMITED | Private company limited by shares | Live |
| NEW UNION FAR EAST LIMITED | Private company limited by shares | Live |
| GLORY UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| ALLIED UNION INTERNATIONAL INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNIPHARM (HONG KONG) LIMITED | Private company limited by shares | Live |
| UNI-WIN INC. LIMITED | Private company limited by shares | Dissolved |
| GLORY UNION ELECTRONIC (H.K.) CO., LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL HOUSING CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Live |
| UNION GOOD INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNIVERSAL JET LIMITED | Private company limited by shares | Dissolved |
| UNION EAST LIMITED | Private company limited by shares | Dissolved |
| GRAND UNION (H.K.) LIMITED | Private company limited by shares | Live |
| BEST UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION BASE (FAR EAST) LIMITED | Private company limited by shares | Dissolved |
| MAX UNION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| SILVER UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION BRIGHT DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION COSMOS DEVELOPMENT LIMITED | Private company limited by shares | Live |
| HK UNION INTERNATIONAL DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION HONEST INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| GUIZHOU XIFENG WIDEPHOS UNITED FERTILIZER (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNIVERSE INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNIX CHINA COMPANY LIMITED | Private company limited by shares | Live |
| UNITED AEROTECH LIMITED | Private company limited by shares | Dissolved |
| LEADER UNION LIMITED | Private company limited by shares | Dissolved |
| WIN STONE UNION METAL LOGISTIC LIMITED | Private company limited by shares | Dissolved |
| SUPERB UNION LIMITED | Private company limited by shares | Dissolved |
| UNIQUE WISDOM LIMITED | Private company limited by shares | Live |
| UNITED PORT INVESTMENT LIMITED | Private company limited by shares | Live |
| UNIONSTAR INTERNATIONAL DEVELOPMENT LIMITED | Private company limited by shares | Live |
| GLOBAL BUDDHISM BUSINESSMEN UNION LIMITED | Company limited by guarantee | Dissolved |
| CHINA SPORTSMAN (HONGKONG) UNION LIMITED | Company limited by guarantee | Live |
| UNIQUE CAPITAL LIMITED | Private company limited by shares | Dissolved |
| UNION GOOD INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNION ASIA TRADING LIMITED | Private company limited by shares | Dissolved |
| BEL AIR UNION LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL LIGHTING LIMITED | Private company limited by shares | Dissolved |
| UNITED GROUP FOR BUSINESS LIMITED | Private company limited by shares | Live |
| UNI-LEADER SHIPPING CO., LIMITED | Private company limited by shares | Dissolved |
| CHINA UNITY INVESTMENT LIMITED | Private company limited by shares | Live |
| BM UNION COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| CHAMP UNION ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| ITALY YI BEI ER UNION DEVELOPMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| GROUP UNION CORPORATION LIMITED | Private company limited by shares | Live |
| UNION FIELD INTERNATIONAL INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL SECURITY PRODUCTS LIMITED | Private company limited by shares | Live |
| UNIVERSAL EXPRESS (HONG KONG) COMPANY LIMITED | Private company limited by shares | Live |
| UNION CHOICE CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| UNION TEAM INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL MAGIC LIMITED | Private company limited by shares | Live |
| UNISPEC LIMITED | Private company limited by shares | Live |
| EXCELLENT UNITED LIMITED | Private company limited by shares | Dissolved |
| UNION MACHINERY & ENGINEERING (ASIA) LIMITED | Private company limited by shares | Live |
| WELL UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNIQUE CARE PLUS COMPANY LIMITED | Private company limited by shares | Live |
| GOOD UNIVERSE LIMITED | Private company limited by shares | Dissolved |
| UNIQUE WEALTH LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL SOLUTIONS LIMITED | Private company limited by shares | Dissolved |
| UNITECH ELECTRIC GROUP LIMITED | Private company limited by shares | Live |
| FINE UNIVERSE ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| UNION GAIN (H.K.) LIMITED | Private company limited by shares | Live |
| OCEAN UNION (H.K.) LIMITED | Private company limited by shares | Live |
| UNION JADE LIMITED | Private company limited by shares | Live |
| CROWN UNION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNIP LIMITED | Private company limited by shares | Live |
| ANGLO UNIVERSE COMPANY LIMITED | Private company limited by shares | Live |
| SEA UNION SHIPPING & TRADING CO., LIMITED | Private company limited by shares | Live |
| UNION BEST MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| UNITECH INC. LIMITED | Private company limited by shares | Live |
| UNION CHOICE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION CHINESE LIMITED | Private company limited by shares | Live |
| UNION BRIGHT INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION BRIGHT TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION BRIGHT INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNION BRIGHT INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION SUPPO BATTERY (HONG KONG) COMPANY LIMITED | Private company limited by shares | Dissolved |
| CHINA PUBLIC WELFARE UNION LIMITED | Private company limited by shares | Dissolved |
| UNITED BUSINESS OPERATING SYSTEMS LIMITED | Private company limited by shares | Live |
| UNION CHOICE LIMITED | Private company limited by shares | Live |
| UNION VANTAGE LIMITED | Private company limited by shares | Dissolved |
| UNION WISE ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNION WISE INTERNATIONAL LIMITED | Private company limited by shares | Live |
| ABLE UNION ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| TOP UNION INVESTMENTS LIMITED | Private company limited by shares | Live |
| STAR UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| HONG KONG TOURISM PROFESSIONALS UNION LIMITED | Private company limited by shares | Dissolved |
| UNION PACIFIC MANUFACTURING LIMITED | Private company limited by shares | Live |
| SILVER UNION ENTERPRISES LIMITED | Private company limited by shares | Live |
| UNION INTERNATIONAL INDUSTRY CO., LIMITED | Private company limited by shares | Dissolved |
| DRAGON UNION LIMITED | Private company limited by shares | Dissolved |
| UNITED SPARKLE (HK) FILM & VIDEO PRODUCTION LIMITED | Private company limited by shares | Live |
| UNITED VICTOR LIMITED | Private company limited by shares | Dissolved |
| UNION PEAK HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNIQUE STAR LIMITED | Private company limited by shares | Live |
| PROSPER UNION LIMITED | Private company limited by shares | Dissolved |
| UNISON ARTIC GALLERY LIMITED | Private company limited by shares | Live |
| CHINA UNIVERSE GROUP LIMITED | Private company limited by shares | Dissolved |
| BEST UNITY INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION CONCEPT INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |