| JOIN UNION LIMITED | Private company limited by shares | Live |
| UNION TEXTILE OF CHINA (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNION REGENT INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNIVERSAL SINDA MULTIMEDIA COMPANY LIMITED | Private company limited by shares | Dissolved |
| BEST UNION INTERNATIONAL INVESTMENT CO., LIMITED | Private company limited by shares | Dissolved |
| UNITY PRECISION ELECTRICAL LIMITED | Private company limited by shares | Dissolved |
| UNITED PACIFIC SHIPPING LIMITED | Private company limited by shares | Live |
| USA UNION AUTO PARTS GROUP COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION STAR INDUSTRIES LIMITED | Private company limited by shares | Live |
| UNIQUE SPORTS AGENCY LIMITED | Private company limited by shares | Dissolved |
| UNION SHEEN INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNI-SKY (CHINA) LIMITED | Private company limited by shares | Dissolved |
| UNI-FINE INVESTMENT LIMITED | Private company limited by shares | Live |
| UNITRANS INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| ITALY UNIVERSE APPLIANCES (INT'L) GROUP LIMITED | Private company limited by shares | Dissolved |
| UNION BEST ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| WIN UNION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| UNITED GAIN INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION BRIDGE CHINA LIMITED | Private company limited by shares | Live |
| UNION (H.K.) CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| UNITED MIND LIMITED | Private company limited by shares | Live |
| UNITED MILLION INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| JOIN UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| FORTUNE UNION TRADING LIMITED | Private company limited by shares | Dissolved |
| UNISOLUTION LIMITED | Private company limited by shares | Dissolved |
| UNITED ENTERPRISES (GROUP) LIMITED | Private company limited by shares | Dissolved |
| UNISTEEL LIMITED | Private company limited by shares | Dissolved |
| SUPER GOAL UNIVERSAL LIMITED | Private company limited by shares | Live |
| UNISON MANAGEMENT LIMITED | Private company limited by shares | Live |
| UNITECH TECHNOLOGY (HK) CO., LIMITED | Private company limited by shares | Dissolved |
| UNION FORCE (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| ORIENTAL UNION LIMITED | Private company limited by shares | Dissolved |
| UNION TEAM ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| GOLDEN UNION FAREAST LIMITED | Private company limited by shares | Dissolved |
| U.K. DIZTIE UNDERWEAR GROUP LIMITED | Private company limited by shares | Dissolved |
| UNITED VICTORY INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNLY BUSINESS LIMITED | Private company limited by shares | Dissolved |
| UNION CONSTRUCTION & ENGINEERING CO. LIMITED | Private company limited by shares | Live |
| UNITRON ELECTRONICS COMPANY LIMITED | Private company limited by shares | Live |
| UNITEX LIMITED | Private company limited by shares | Dissolved |
| UNION DEVELOPMENT INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION WEALTHY INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL ENERGY TRADING LIMITED | Private company limited by shares | Dissolved |
| UNIYET COMPANY LIMITED | Private company limited by shares | Dissolved |
| WELL UNITED ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNION PUBLIC CARS MANAGEMENT & INVESTMENT LIMITED | Private company limited by shares | Live |
| UNIWELL (H.K.) LIMITED | Private company limited by shares | Live |
| INTERNATIONAL MANAGERS UNION LIMITED | Private company limited by shares | Dissolved |
| UNITED EXCEL LIMITED | Private company limited by shares | Live |
| UNITED BROKERS LIMITED | Private company limited by shares | Live |
| UNIVERSITY EYE TECHNOLOGIES NETWORK LIMITED | Private company limited by shares | Live |
| UNION FINANCE LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL TALENT (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| LUCKY UNION INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNICREST LIMITED | Private company limited by shares | Live |
| FARRI UNITED LIMITED | Private company limited by shares | Live |
| CHANDRA UNIVERSAL LIMITED | Private company limited by shares | Live |
| UNIVERSAL UNIT NETWORK LIMITED | Private company limited by shares | Dissolved |
| UNIVERSE FORTUNES PUBLISHING LIMITED | Private company limited by shares | Dissolved |
| UNI-TOP HOLDING CO LIMITED | Private company limited by shares | Live |
| UNITED FIBERNET LIMITED | Private company limited by shares | Dissolved |
| UNITY ENTERTAINMENT WORKSHOP LIMITED | Private company limited by shares | Dissolved |
| UNITED CHAMPION FREIGHT LIMITED | Private company limited by shares | Dissolved |
| UNOMIA INTERNATIONAL GROUP (H.K.) LIMITED | Private company limited by shares | Dissolved |
| HEART UNION TRANSPORTATION LIMITED | Private company limited by shares | Live |
| UNITED TARGET TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Live |
| HILL UNION (HONG KONG) LIMITED | Private company limited by shares | Live |
| UNITED FORCE ENTERPRISES COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNITED CENTURY LIMITED | Private company limited by shares | Dissolved |
| CAPITAL UNITED LIMITED | Private company limited by shares | Dissolved |
| INTERNATIONAL ENTERPRISES' RIGHTS SECURITY UNION LIMITED -THE- | Private company limited by shares | Live |
| QUEEN'S UNIVERSITY OF BRIGHTON (QUB) LIMITED -THE- | Private company limited by shares | Dissolved |
| MYANMAR OVERSEAS UNION LIMITED | Private company limited by shares | Live |
| OCEAN UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| NEW UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNITECH INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| GOLD UNITED INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| GOLD UNION INTERNATIONAL INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| ON UNION CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| UNION CHOICE HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION SUNNY INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNITECH ELECTRIC & LIGHTNING TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| JAC UNION TECHNOLOGY DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNE-HONEST LIMITED | Private company limited by shares | Dissolved |
| UNIFOUNDATION LIMITED | Private company limited by shares | Dissolved |
| UNION CYBER TECHNOLOGIES (H.K.) LIMITED | Private company limited by shares | Dissolved |
| TWIN UNION INT'L GROUP (HK) CO. LIMITED | Private company limited by shares | Dissolved |
| UNITED CHAMP ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| MEGA UNITED LIMITED | Private company limited by shares | Live |
| UNISON ADVERTISING WORKS LIMITED | Private company limited by shares | Live |
| UNIVERSE TECHNOLOGY INVESTMENT (CHINA) COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION CHAMPION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION MEDICARE COMPANY LIMITED | Private company limited by shares | Dissolved |
| WORLD BEAUTY ELITE UNION FOUNDATION LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL STAR LIMITED | Private company limited by shares | Dissolved |
| UNION GAIN INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SINO UNION MOTORS LIMITED | Private company limited by shares | Dissolved |
| FIRST UNIVERSE LIMITED | Private company limited by shares | Dissolved |
| UNITED FRONTIER LIMITED | Private company limited by shares | Live |
| PREMIER UNIVERSAL LIMITED | Private company limited by shares | Dissolved |