| KING UNION ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| KING UNION ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| SPLENDID UNION LIMITED | Private company limited by shares | Live |
| CROSS UNION INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNION RICH INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION GOOD CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| UNION WELL CONSULTANTS LIMITED | Private company limited by shares | Live |
| UNION WIN INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION LUXE DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION TOP INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| SINO UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| SINO UNION ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| GRAND UNION LIMITED | Private company limited by shares | Dissolved |
| OTTO UNION LIMITED | Private company limited by shares | Dissolved |
| WELL UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION WAY CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| UNION SYSTEM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| DISK UNION LIMITED | Private company limited by shares | Live |
| ALLIED UNION INTERNATIONAL 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 |
| 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 |
| ALLIED UNION TRADING LIMITED | Private company limited by shares | Dissolved |
| CREATE UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| CHINA UNION (HK) LIMITED | Private company limited by shares | Dissolved |
| UNION MATERIALS ASSOCIATED LIMITED | Private company limited by shares | Dissolved |
| B & L UNION DEVELOPMENT 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 |
| SUN EMBASSY UNION ENTERPRISE COMPANY LIMITED | Private company limited by shares | Dissolved |
| HONG UNION INDUSTRIAL 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 |
| HONOUR UNION LIMITED | Private company limited by shares | Dissolved |
| GOLD CENTURY UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| SHEEN UNION DEVELOPMENT 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 |
| UNION INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| GREAT UNION INTERNATIONAL DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| LIGHT UNION LIMITED | Private company limited by shares | Live |
| UNION TRADE LIMITED | Private company limited by shares | Live |
| UNION MARINE SHIPPING CO., LIMITED | Private company limited by shares | Dissolved |
| 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 |
| WELL UNION (ASIA) INVESTMENT LIMITED | Private company limited by shares | Live |
| 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 |
| CHARTER UNION HONG KONG LIMITED | Private company limited by shares | Dissolved |
| UNION COURSE LIMITED | Private company limited by shares | Dissolved |
| MATE UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| GREEN UNION INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNION LASER CONTRACTING AND DESIGN LIMITED | Private company limited by shares | Live |
| UNION FINE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION GAIN INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| NICE UNION SERVICE LIMITED | Private company limited by shares | Live Commenced dormancy on 22-Feb-1995 |
| ALLIED UNION ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| EASE UNION LIMITED | Private company limited by shares | Dissolved |
| EASE UNION INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| WONDER UNION LIMITED | Private company limited by shares | Dissolved |
| NEW UNION ESTATES (CHINA) LIMITED | Private company limited by shares | Live |
| WORLD UNION CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| GIANT UNION COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION LUCK LIMITED | Private company limited by shares | Dissolved |
| SOUTH UNION FASHIONS LIMITED | Private company limited by shares | Dissolved |
| UNION FOUNDATE LIMITED | Private company limited by shares | Dissolved |
| UNION ENGINEERING & TRADING CO. LIMITED | Private company limited by shares | Dissolved |
| UNION & FOOK ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| UNION KING DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| NEW UNION INVESTMENTS (CHINA) LIMITED | Private company limited by shares | Live |
| SPARK UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION JACK GARMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| SUN UNION PROPERTY LIMITED | Private company limited by shares | Dissolved |
| UNION ARTS ALUMINIUM WORKS LIMITED | Private company limited by shares | Live |
| UNION ART TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| SUPER UNION INVESTMENTS LIMITED | Private company limited by shares | Dissolved |