| YUAN JING UNION LIMITED | Private company limited by shares | Dissolved |
| UNITED SKY TRADING LIMITED | Private company limited by shares | Dissolved |
| GREAT UNION TRADING LIMITED | Private company limited by shares | Live |
| UNITED CHAMPION INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNI-WELL TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| UNI-WELL TRADING LIMITED | Private company limited by shares | Dissolved |
| RICH UNIVERSE LIMITED | Private company limited by shares | Dissolved |
| UNION ACTION LIMITED | Private company limited by shares | Dissolved |
| UNION FRIEND INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION TEAM SHIPPING LIMITED | Private company limited by shares | Dissolved |
| SIGMA UNIVERSAL COMPANY LIMITED | Private company limited by shares | Live |
| UNION SKY INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| HEALTH UNITED COMPANY LIMITED | Private company limited by shares | Live |
| UNION HOTEL MANAGEMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNIVERSE DRAGON ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| UNICO SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| UNINET INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL NAVIGATION (ASIA) LIMITED | Private company limited by shares | Dissolved |
| ASIA UNION INFORMATION CO., LIMITED | Private company limited by shares | Live |
| BEST UNION (HONG KONG) TRADING LIMITED | Private company limited by shares | Live |
| UNIVERSAL ELECTRICAL APPLIANCES CO. LIMITED | Private company limited by shares | Dissolved |
| UNITED WISDOM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| CYBER UNIQUE LIMITED | Private company limited by shares | Dissolved |
| UNOTEX LIMITED | Private company limited by shares | Dissolved |
| GLOBAL UNIVERSAL STANDARD CO., LIMITED | Private company limited by shares | Dissolved |
| JOIN UNIVERSAL LIMITED | Private company limited by shares | Live |
| UNILIFE JV LIMITED | Private company limited by shares | Dissolved |
| UNITED KEY LIMITED | Private company limited by shares | Live |
| FULLYGOLD UNIVERSAL LIMITED | Private company limited by shares | Dissolved |
| UNMIN SHIPPING AGENCY LIMITED | Private company limited by shares | Dissolved |
| UNITY APPLIANCES MANUFACTORY LIMITED | Private company limited by shares | Dissolved |
| UNION CHINA INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| NICE UNION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| CHAMP UNION INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| HK UNION INT'L GROUP LIMITED | Private company limited by shares | Dissolved |
| UNI-TOP ASP LIMITED | Private company limited by shares | Dissolved |
| UNION BEST SHIPPING LIMITED | Private company limited by shares | Live |
| UNITED TRANSPORTATION & SERVICE LIMITED | Private company limited by shares | Live |
| UNIVERSAL CELLULAR ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| UNION COMFORT ADVERTISING LIMITED | Private company limited by shares | Dissolved |
| SMART UNION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION ALPHA CORPORATE ADVISORY LIMITED | Private company limited by shares | Live |
| UNIMEX MANUFACTURING LIMITED | Private company limited by shares | Live |
| UNION SEA TRANSPORTATION (HONG KONG) COMPANY LIMITED | Private company limited by shares | Live |
| UNION INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Live |
| FORTUNE UNION (HONG KONG) LIMITED | Private company limited by shares | Live |
| UNITED LIGHTING ENTERPRISE COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNITED HORIZON LIMITED | Private company limited by shares | Dissolved |
| HONG KONG UNION FOOD PRODUCTS LIMITED | Private company limited by shares | Live |
| UNITED SMART ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL HEALTH CARE LIMITED | Private company limited by shares | Live |
| UNITED TECHNICA LIMITED | Private company limited by shares | Dissolved |
| UNITED J TEXTILES LIMITED | Private company limited by shares | Dissolved |
| UNION LOGISTICS (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNI-WELL PACIFIC LIMITED | Private company limited by shares | Dissolved |
| FORTRESS UNION LIMITED | Private company limited by shares | Dissolved |
| ZHONG MEI UNITED INTERNATIONAL MONETARY INVESTMENT HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| NEW UNIVERSE FUTURES (HK) LIMITED | Private company limited by shares | Live |
| UNI-LAB LIMITED | Private company limited by shares | Live |
| UNITED PACIFIC FINANCE & INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| FAITH UNION ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| UNION FORTUNE ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL MEDICAL ELITE LIMITED | Private company limited by shares | Live |
| UNITED LEADER LIMITED | Private company limited by shares | Dissolved |
| UNION ALPHA LIMITED | Private company limited by shares | Dissolved |
| UNION LAND INVESTMENTS LIMITED | Private company limited by shares | Live |
| UNION KINGDOM INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION C-BUTTON CO., LIMITED | Private company limited by shares | Live |
| UNIQUE KENT LIMITED | Private company limited by shares | Live |
| UNIQUE CLASS LIMITED | Private company limited by shares | Live |
| UNIQUE WEALTH INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| ASIA UNITED HELICOPTER GENERAL AERONAUTICAL ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| GO TECH (UNITED) LIMITED | Private company limited by shares | Dissolved |
| UNISTAR SALES COMPANY LIMITED | Private company limited by shares | Live |
| UNION PROFIT HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| GREAT UNIVERSE INTERNATIONAL TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION BEAUTY CENTRE LIMITED | Private company limited by shares | Dissolved |
| U-NET ENTERPRISE LIMITED | Private company limited by shares | Live |
| SINO UNION INTERNATIONAL INVESTMENTS LIMITED | Private company limited by shares | Live |
| UNION FAITH ACCOUNTING AND SECRETARIAL LIMITED | Private company limited by shares | Dissolved |
| UNION WIN INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| REALLY PARK UNIVERSAL LIMITED | Private company limited by shares | Dissolved |
| UNION INFO COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNITED ESTATE EXCHANGE CO. LIMITED | Private company limited by shares | Live |
| UNICARE HEALTHCARE LIMITED | Private company limited by shares | Dissolved |
| UNGERBOECK SYSTEMS INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNIVERSAL BASE TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION HERALD LIMITED | Private company limited by shares | Dissolved |
| ENGLISH-SPEAKING UNION (HONG KONG) LIMITED -THE- | Company limited by guarantee | Live |
| GRAND UNIVERSE INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| BRIGHT UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| NEW UNIVERSE TECHNOLOGY (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| SUN UNION (CHINA) LIMITED | Private company limited by shares | Live |
| UNIC INTERNATIONAL GROUP LIMITED | Private company limited by shares | Live |
| UNI-HONG TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| SINO UNION INVESTMENT HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| PARALLEL UNIVERSE LIMITED | Private company limited by shares | Dissolved |
| Universal Champion Trading Limited | Private company limited by shares | Live |
| UNIVERSE VICTORY LIMITED | Private company limited by shares | Dissolved |
| UNI-FAMOUS LIMITED | Private company limited by shares | Dissolved |