| UNION ETERNAL ELECTRONICS COMPANY LIMITED | Private company limited by shares | Dissolved |
| SINO UNION TRANSPORTATION LIMITED | Private company limited by shares | Dissolved |
| CENTURY UNIVERSAL LIMITED | Private company limited by shares | Dissolved |
| UNDERLINES (ASIA) MFG CO. LIMITED | Private company limited by shares | Dissolved |
| UNI-TALENT LIMITED | Private company limited by shares | Dissolved |
| WIN UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| WEAL UNION LIMITED | Private company limited by shares | Dissolved |
| UNION FALCON LIMITED | Private company limited by shares | Live |
| UNITED HOPE LIMITED | Private company limited by shares | Live |
| BIG UNION MOTORS (GROUP) LIMITED | Private company limited by shares | Live |
| UNION FIELD ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| GLORY UNITED ENTERPRISES LIMITED | Private company limited by shares | Live Commenced dormancy on 26-Aug-2014 |
| TOP UNITED ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| CHINA UNION (FAR EAST) LIMITED | Private company limited by shares | Live |
| UNION GOOD HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| LION UNION ENTERPRISES LIMITED | Private company limited by shares | Live |
| BOSPHORUS UNISON LIMITED | Private company limited by shares | Live |
| CHARTER UNION MANAGEMENT LIMITED | Private company limited by shares | Live |
| LUCAS UNIVERSAL LIMITED | Private company limited by shares | Dissolved |
| UNION JOINT (HONG KONG) LIMITED | Private company limited by shares | Live |
| WING LEE INTERNATIONAL (H.K.) FUND UNION LIMITED | Private company limited by shares | Dissolved |
| UNION GROUP ELECTRONIC COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION CHANCE GROUP (MANUFACTURING) LIMITED | Private company limited by shares | Live |
| OVERSEAS UNION TRADING COMPANY LIMITED | Private company limited by shares | Live |
| UNION TREND HOLDINGS LIMITED | Private company limited by shares | Live |
| WINTOP UNIVERSAL LIMITED | Private company limited by shares | Dissolved |
| UNION CREATION CONSTRUCTION (H.K.) LIMITED | Private company limited by shares | Dissolved |
| U.N.I. TRANSPORTATION CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| VICTORY UNION LIMITED | Private company limited by shares | Dissolved |
| UNICENTURY LIMITED | Private company limited by shares | Live |
| UNIGOLD LIMITED | Private company limited by shares | Dissolved |
| UNIGOLDEN LIMITED | Private company limited by shares | Live |
| UNION TRANSPORTATION (FAR EAST) COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL CONSULTING COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNISTRUT SERVICE CENTRE (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNITED ASIA SHIPPING LIMITED | Private company limited by shares | Dissolved |
| CITY UNION (GROUP) LIMITED | Private company limited by shares | Dissolved |
| UNITED AIR SYSTEMS COMPANY LIMITED | Private company limited by shares | Live |
| UNIVERSE PROPERTY INVESTMENT LIMITED | Private company limited by shares | Live |
| UNITED SMART ASIA LIMITED | Private company limited by shares | Dissolved |
| GOLD UNION INDUSTRIAL LIMITED | Private company limited by shares | Live |
| UNION RANK LIMITED | Private company limited by shares | Live |
| SINO UNION INTERNATIONAL ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| UNION LIFE LIMITED | Private company limited by shares | Live |
| UNITAC LIMITED | Private company limited by shares | Dissolved |
| UNITED HOPE INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| WORLD UNION TRADING LIMITED | Private company limited by shares | Dissolved |
| SKY UNIVERSE TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Dissolved |
| EXCEL UNION ENTERPRISES LIMITED | Private company limited by shares | Live |
| UNION INVESTMENT HOLDINGS LIMITED | Private company limited by shares | Live |
| BEST UNION (HK) INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION BOND DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNIVERSE CITY LIMITED | Private company limited by shares | Dissolved |
| UNITED BOARD LIMITED | Private company limited by shares | Dissolved |
| O & YH UNION FOOTBALL CLUB LIMITED | Company limited by guarantee | Dissolved |
| UNICO (ASIA) LIMITED | Private company limited by shares | Dissolved |
| GRANT UNION LIMITED | Private company limited by shares | Live |
| SMART UNION TRANSPORTATION LIMITED | Private company limited by shares | Dissolved |
| BEST UNION TRANSPORTATION LIMITED | Private company limited by shares | Dissolved |
| FIRST UNION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| GLOBE UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| WEALTH UNION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| SPEED UNION INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| GMR UNITED TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| WIN UNION INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| ASIA UNION TRANSPORTATION SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| UNITEN LIMITED | Private company limited by shares | Dissolved |
| UNION TRUTH (PACIFIC) LIMITED | Private company limited by shares | Dissolved |
| UNION GRANDE ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| UNION FAVOUR LIMITED | Private company limited by shares | Dissolved |
| GREAT UNION CORPORATION LIMITED | Private company limited by shares | Live |
| UNION WISE HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| GIANT UNION (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| RIGHT UNION (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| POLY UNION (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNI-CONCEPT (TEXTILE) LIMITED | Private company limited by shares | Live |
| WELL UNION INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| SINO UNION PETRO-CHEMICAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION WORKS LIMITED | Private company limited by shares | Live |
| BRIGHT UNION (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNI-TALENT TRADING LIMITED | Private company limited by shares | Dissolved |
| SINO UNION ENTERPRISE LIMITED | Private company limited by shares | Live Commenced dormancy on 31-Dec-2014 |
| NEW FOCUS UNDERWEAR FACTORY LIMITED | Private company limited by shares | Dissolved |
| EXPRESS UNION LIMITED | Private company limited by shares | Dissolved |
| UNION SUN INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| CYBER UNION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| CENTRAL UNION LIMITED | Private company limited by shares | Live |
| TETLY UNDERGARMENT COMPANY LIMITED | Private company limited by shares | Live |
| UNION KING INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNITECH EDUCATION CENTRE LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL SIGN LIMITED | Private company limited by shares | Dissolved |
| UNICAN TRADING LIMITED | Private company limited by shares | Live |
| ABLE UNION LIMITED | Private company limited by shares | Dissolved |
| UNION STATE LIMITED | Private company limited by shares | Live |
| UNIVERSE (HK) PRECAST CONCRETE PRODUCTS LIMITED | Private company limited by shares | Dissolved |
| UNIVERSITY OF KNOWLEDGE CO., LIMITED | Private company limited by shares | Dissolved |
| UNION TIME TRADING LIMITED | Private company limited by shares | Dissolved |
| SILVER UNION LIMITED | Private company limited by shares | Dissolved |
| UNION PLASTIC ENTERPRISE (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| OCEAN UNIONS LIMITED | Private company limited by shares | Dissolved |