| UNI-ENERGY LIMITED | Private company limited by shares | Live |
| UNI-GLITTER LIMITED | Private company limited by shares | Dissolved |
| UNI-FORCE COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNIGLOBE INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| FRANK UNION LIMITED | Private company limited by shares | Live |
| MANCHESTER UNION LIMITED | Private company limited by shares | Dissolved |
| ALLIED UNION PROPERTIES CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| ALLIED UNION ENGINEERING LIMITED | Private company limited by shares | Live |
| FORE UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| KENT UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| TINY FILM UNIT LIMITED | Private company limited by shares | Live |
| UNI-UNITED COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION HONG KONG PETROCHEMICALS COMPANY LIMITED | Private company limited by shares | Live |
| TOP UNION HONG KONG LIMITED | Private company limited by shares | Live |
| WELL UNION (VIETNAM) LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL SQUARE LIMITED | Private company limited by shares | Dissolved |
| ALLIED UNION TRADING LIMITED | Private company limited by shares | Dissolved |
| CREATE UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNITED WAY PRODUCTIONS LIMITED | Private company limited by shares | Dissolved |
| UNITED CENTRE TRADING LIMITED | Private company limited by shares | Dissolved |
| UNISTAR INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNIGRAND LIMITED | Private company limited by shares | Dissolved |
| UNIGROUP LIMITED | Private company limited by shares | Dissolved |
| CHINA UNION (HK) LIMITED | Private company limited by shares | Dissolved |
| SKY UNICORN LIMITED | Private company limited by shares | Dissolved |
| UNION MATERIALS ASSOCIATED LIMITED | Private company limited by shares | Dissolved |
| UNICOMP SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| B & L UNION DEVELOPMENT COMPANY, LIMITED | Private company limited by shares | Dissolved |
| UNIVERSE (P & A) TRAVEL COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION LINE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION ASIA INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION TOP CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| UNION INJECTION MOULDING MACHINE FACTORY LIMITED | Private company limited by shares | Dissolved |
| GREAT UNION INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| STRONG UNION LIMITED | Private company limited by shares | Dissolved |
| UNION TRADE TRANSPORTATION LIMITED | Private company limited by shares | Dissolved |
| RICH UNION CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| UNITED PERSPECTIVES GROUP LIMITED | Private company limited by shares | Dissolved |
| SUN EMBASSY UNION ENTERPRISE COMPANY LIMITED | Private company limited by shares | Dissolved |
| HONG UNION INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| MAGUCHI UNICON FREIGHT (H.K.) LIMITED | Private company limited by shares | Live |
| UNITED ORIENT SHIPPING COMPANY LIMITED | Private company limited by shares | Dissolved |
| WORLD UNION FOUNDATION (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNION POWER INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| ASIA UNION (HK) ENTERPRISES LIMITED | Private company limited by shares | Live |
| TSUEN WAN WAI CHOW MAIN UNION LIMITED | Company limited by guarantee | Live |
| UNIC INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| HONOUR UNION LIMITED | Private company limited by shares | Dissolved |
| GOLD CENTURY UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| SHEEN UNIVERSE LIMITED | Private company limited by shares | Dissolved |
| UNITED WAVE TRADING LIMITED | Private company limited by shares | Dissolved |
| EVER UNIVERSAL LIMITED | Private company limited by shares | Live |
| SHEEN UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| TONKING UNITED ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNION CHINA LIMITED | Private company limited by shares | Dissolved |
| UNION WIN LIMITED | Private company limited by shares | Dissolved |
| UNIONEER LIMITED | Private company limited by shares | Dissolved |
| UNIONIX LIMITED | Private company limited by shares | Dissolved |
| UNION KING METALS AND MINERALS COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL SAIL LIMITED | Private company limited by shares | Dissolved |
| UNISON ENTERPRISES CORPORATION LIMITED | Private company limited by shares | Dissolved |
| UNION INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNICON LIMITED | Private company limited by shares | Dissolved |
| DIAMOND UNIVERSE LIMITED | Private company limited by shares | Dissolved |
| GREAT UNION INTERNATIONAL DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNISON INSURANCE AGENCY LIMITED | Private company limited by shares | Dissolved |
| LIGHT UNION LIMITED | Private company limited by shares | Live |
| HUANG UNIVERSAL ENTERPRISE COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION TRADE LIMITED | Private company limited by shares | Live |
| UNION MARINE SHIPPING CO., LIMITED | Private company limited by shares | Dissolved |
| UNITED MARBLE COMPANY LIMITED | Private company limited by shares | Live |
| RICH UNION PROPERTIES LIMITED | Private company limited by shares | Live |
| UNION FORD PROPERTIES LIMITED | Private company limited by shares | Live |
| UNION FORTUNE PROPERTIES LIMITED | Private company limited by shares | Live |
| UNION LAND PROPERTIES LIMITED | Private company limited by shares | Live |
| UNION GOOD PROPERTIES LIMITED | Private company limited by shares | Live |
| UNION WELL SHIPPING LIMITED | Private company limited by shares | Dissolved |
| DIRECT UNIVERSAL LIMITED | Private company limited by shares | Dissolved |
| WELL UNION (ASIA) INVESTMENT LIMITED | Private company limited by shares | Live |
| SILVER UNITY LIMITED | Private company limited by shares | Dissolved |
| UNION FAIR DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION ASIA LIMITED | Private company limited by shares | Dissolved |
| UNION TIME INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| ALLIED UNION GARMENTS LIMITED | Private company limited by shares | Dissolved |
| MAX UNION CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| UNICROSS INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNITECH (TECHNOLOGY) LIMITED | Private company limited by shares | Dissolved |
| UNIGAIN LIMITED | Private company limited by shares | Dissolved |
| CHARTER UNION HONG KONG LIMITED | Private company limited by shares | Dissolved |
| UNION COURSE LIMITED | Private company limited by shares | Dissolved |
| UNIVERSE PROPERTIES LIMITED | Private company limited by shares | Dissolved |
| MATE UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNI-STAR SHIPPING LIMITED | Private company limited by shares | Live |
| GREEN UNION INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNION LASER CONTRACTING AND DESIGN LIMITED | Private company limited by shares | Live |
| NICE UNITY INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| POLY UNIT LIMITED | Private company limited by shares | Dissolved |
| UNICORE LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL HOPE LIMITED | Private company limited by shares | Dissolved |
| UNION FINE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |