| UNION EXPRESS INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION LEGEND LIMITED | Private company limited by shares | Dissolved |
| UNION ACCORD INTERNATIONAL LIMITED | Private company limited by shares | Live |
| SMART UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNITACK COMPANY LIMITED | Private company limited by shares | Dissolved |
| HONG KONG UNDERGROUND ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL CHAMPION ELECTRIC CO., LIMITED | Private company limited by shares | Dissolved |
| NEW UNIVERSE ENTERPRISES (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNITED MERCANTILE COMPANY LIMITED | Private company limited by shares | Dissolved |
| MARK UNION LIMITED | Private company limited by shares | Dissolved |
| UNION FUND INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION FEDELITY LIMITED | Private company limited by shares | Dissolved |
| UNITED STRONG LIMITED | Private company limited by shares | Dissolved |
| WELL UNION MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| EAST UNITY COMPANY LIMITED | Private company limited by shares | Live |
| UNION LORD LIMITED | Private company limited by shares | Dissolved |
| UNIDEX LIMITED | Private company limited by shares | Live |
| UNION ASIA ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNITECH ELECTRICAL LIMITED | Private company limited by shares | Live |
| UNION MAX INDUSTRIAL LIMITED | Private company limited by shares | Live |
| WISE UNITY LIMITED | Private company limited by shares | Dissolved |
| UNION PIONEER DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNI-TRAN LIMITED | Private company limited by shares | Dissolved |
| UNION CONCORD INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNITED SUCCESS TRANSPORTATION LIMITED | Private company limited by shares | Dissolved |
| UNIFIRST LIMITED | Private company limited by shares | Dissolved |
| UNITY SENSE LIMITED | Private company limited by shares | Dissolved |
| HOPE UNION ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNISON GLORY GROUP LIMITED | Private company limited by shares | Dissolved |
| UNIONA ASIA LIMITED | Private company limited by shares | Dissolved |
| UNION VENTURE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| INTERNATIONAL DISTANCE UNIVERSITIES ASSOCIATION LIMITED | Private company limited by shares | Dissolved |
| UNIPACIFIC INDUSTRIAL LIMITED | Private company limited by shares | Live |
| UNITED BEST INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| INTER UNION SECURITY SYSTEM LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL PRODUCTS (ASIA) LIMITED | Private company limited by shares | Dissolved |
| UNITED NON-FERROUS TRADING LIMITED | Private company limited by shares | Live |
| UNIVERSAL WATCH COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION LOYAL LIMITED | Private company limited by shares | Dissolved |
| UNION HINT LIMITED | Private company limited by shares | Dissolved |
| UNION BLESS LIMITED | Private company limited by shares | Live |
| NEW UNITED HOLDING COMPANY LIMITED | Private company limited by shares | Live |
| UNION GENESIS LIMITED | Private company limited by shares | Dissolved |
| UNION EASY LIMITED | Private company limited by shares | Dissolved |
| UNION AMPLE LIMITED | Private company limited by shares | Dissolved |
| UNION ADVANCE LIMITED | Private company limited by shares | Dissolved |
| UNION SUCCESS LIMITED | Private company limited by shares | Live |
| NICE TRADING UNION LIMITED | Private company limited by shares | Dissolved |
| RICH BOSS UNITED GROUP LIMITED | Private company limited by shares | Dissolved |
| UNI-ACE MARITIME LIMITED | Private company limited by shares | Dissolved |
| UNION CLASS LIMITED | Private company limited by shares | Dissolved |
| HONG KONG UNDERWATER ASSOCIATION LIMITED | Company limited by guarantee | Live |
| UNION SPACE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNI-PRO (HONG KONG) COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION BUSINESS INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION BUSINESS FORMS LIMITED | Private company limited by shares | Dissolved |
| UNION INDUSTRIAL SERVICES LIMITED | Private company limited by shares | Dissolved |
| UNION LINK (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNION LINK HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION EASY HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| CONCORD UNIVERSAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION ASIA CORPORATION LIMITED | Private company limited by shares | Dissolved |
| UNION WORLD CORPORATION LIMITED | Private company limited by shares | Live |
| GOLD UNION HOLDING LIMITED | Private company limited by shares | Live |
| GOLD UNION ASIA LIMITED | Private company limited by shares | Live |
| UNITED NETWORK LIMITED | Private company limited by shares | Live |
| WORLD UNION (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNION LASER SECURITY CONSULTANTS CO., LIMITED | Private company limited by shares | Live |
| UNION ASIA AIRFREIGHT LIMITED | Private company limited by shares | Dissolved |
| UNION HEAVEN LIMITED | Private company limited by shares | Dissolved |
| UNION (HK) INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNIQUEVER INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNISON FAR EAST TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| UNION CHOICE INTERNATIONAL INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNION CONSTRUCTION (GROUP) LIMITED | Private company limited by shares | Live |
| WELL UNITY INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| B P UNITED LIMITED | Private company limited by shares | Dissolved |
| SUPREME UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION LINK MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| UNION LINK TRANSPORTATION LIMITED | Private company limited by shares | Dissolved |
| UNION FOND LIMITED | Private company limited by shares | Dissolved |
| UNITECH ELECTRONICS CORPORATION LIMITED | Private company limited by shares | Dissolved |
| TAI UNIVERSAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNCLE LIMITED | Private company limited by shares | Dissolved |
| SHEEN UNITY LIMITED | Private company limited by shares | Dissolved |
| UNION SOUND & LIGHTING CONSTRUCTION COMPANY LIMITED | Private company limited by shares | Dissolved |
| R A C UNITED ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNITED ASIA SAWMILL LIMITED | Private company limited by shares | Dissolved |
| NEW UNIVERSE NAVIGATION LIMITED | Private company limited by shares | Live |
| UNIONIX FINANCE CONSULTANCY LIMITED | Private company limited by shares | Dissolved |
| SUN FLOWER UNIVERSAL LIMITED | Private company limited by shares | Dissolved |
| UNI-WAY RESOURCES LIMITED | Private company limited by shares | Dissolved |
| UNISPORT INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION KING SING DECORATION ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| UNION FINANCE INTERNATIONAL (HK) LIMITED | Private company limited by shares | Live |
| UNION ASSET DEVELOPMENT LIMITED | Private company limited by shares | Live |
| SHEEN UNIVERSE ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| ORIENTAL UNIVERSAL LIMITED -THE- | Private company limited by shares | Dissolved |
| BAG UNIVERSE LIMITED | Private company limited by shares | Dissolved |
| UNITECH (HONG KONG) INDUSTRIAL LIMITED | Private company limited by shares | Live |