| U.S.A. UNICOM ELECTRIC CO., LIMITED | Private company limited by shares | Dissolved |
| PAN ASIA UNITED LIMITED | Private company limited by shares | Dissolved |
| UNION (CHINA) PURCHASING CO., LIMITED | Private company limited by shares | Dissolved |
| UNILANE PETROLEUM LIMITED | Private company limited by shares | Live |
| UNI-GLOBAL (HONG KONG) LIMITED | Private company limited by shares | Live |
| AN SOON UNITY LIMITED | Private company limited by shares | Live |
| UNISON (HONG KONG) COMPANY LIMITED | Private company limited by shares | Live |
| ROYAL UNIVERSAL LIMITED | Private company limited by shares | Live |
| SUNWAY UNION LOGISTICS LIMITED | Private company limited by shares | Dissolved |
| UNIGREAT LIMITED | Private company limited by shares | Live |
| UNION LAND DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION MANUFACTURING & CO., LIMITED | Private company limited by shares | Dissolved |
| UNION WORLD ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| CHINA UNIQUE INVESTMENTS LIMITED | Private company limited by shares | Live |
| HONGKONG UNION ARCHITECTURE INSTITUTE LIMITED | Private company limited by shares | Live |
| UNISON HOPE CHARITABLE FOUNDATION LIMITED | Company limited by guarantee | Live |
| UNESCO Hong Kong Association Limited | Company limited by guarantee | Live |
| STAR UNIVERSE CORPORATION LIMITED | Private company limited by shares | Live |
| UNISON GROUP HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| HARVEST UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| CHINA INDUSTRIAL INTEGRITY UNION CORPORATION LIMITED | Private company limited by shares | Live |
| UNIMATRIX ASIA LIMITED | Private company limited by shares | Live |
| UNIVERSAL NET TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION CITY LIMITED | Private company limited by shares | Dissolved |
| UNION MFG GROUP LIMITED | Private company limited by shares | Dissolved |
| UNIX LIMITED | Private company limited by shares | Live |
| UNION BIO-CHEM PHARMACEUTICAL LIMITED | Private company limited by shares | Dissolved |
| GOLDEN UNION (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNION CHEER LIMITED | Private company limited by shares | Dissolved |
| UNION LOGISTICS INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Live |
| UNION PROFIT LOGISTICS SERVICES LIMITED | Private company limited by shares | Live |
| UNION LAND (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| TECHNIC STAR UNIVERSAL LIMITED | Private company limited by shares | Live |
| BEST UNIVERSAL PRODUCTS LIMITED | Private company limited by shares | Live |
| UNITED CENTURY INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNITED FINANCE AND INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNITED ENGLISH PUBLISHING LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL HUIFENG ELECTRONIC LIMITED | Private company limited by shares | Dissolved |
| UNION FASHIONS HONG KONG LIMITED | Private company limited by shares | Dissolved |
| UNION TARGET TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| UNION GARMENT FACTORY LIMITED | Private company limited by shares | Dissolved |
| UNIHANS SHIPPING COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNICON INTERNATIONAL GROUP LIMITED | Private company limited by shares | Live |
| UNIVERSAL ELECTRICAL COMPANY LIMITED | Private company limited by shares | Live |
| UNION ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNIKITAS & CO., LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL EXPORTS TRADE LIMITED | Private company limited by shares | Live |
| UNI-PROFIT LIMITED | Private company limited by shares | Dissolved |
| UNION FORCE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION COMMUNITY LIMITED | Private company limited by shares | Dissolved |
| UNITED SOUTHERN COMPANY LIMITED | Private company limited by shares | Dissolved |
| TOP UNION (FAR EAST) LIMITED | Private company limited by shares | Dissolved |
| UNION ASIA TRANSPORTATION COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNIVERSE PRINTING COMPANY LIMITED | Private company limited by shares | Live |
| CHINA UNION DEVELOPMENT HOLDING LIMITED | Private company limited by shares | Dissolved |
| NEO UNIFORM LIMITED | Private company limited by shares | Live |
| WELL UNION LOGISTICS LIMITED | Private company limited by shares | Live |
| GIANT UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| UNITED CENTURY GROUP COMPANY LIMITED | Private company limited by shares | Live |
| UNITED PROPERTIES LIMITED | Private company limited by shares | Dissolved |
| UNITED SHIPPING LIMITED | Private company limited by shares | Dissolved |
| GREAT UNION COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| UNION ASIA CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| UNI-PACK ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| UNI-WELL CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL VICTORY INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION SMARTER LIMITED | Private company limited by shares | Live |
| UNIVERSE PUBLISHING GROUP LIMITED | Private company limited by shares | Dissolved |
| XIN YI UNDERWEAR (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| ON UNION MANAGEMENT LIMITED | Private company limited by shares | Live |
| EVER UNION TRADING LIMITED | Private company limited by shares | Dissolved |
| CENTURY 21 UNION PROPERTIES LIMITED | Private company limited by shares | Dissolved |
| UNITED POWER LIMITED | Private company limited by shares | Live |
| SMART PRINCE UNIVERSAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL A.B.C. FOOTWEARS CO., LIMITED | Private company limited by shares | Dissolved |
| PROFIELD UNIVERSAL LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL PROPERTIES FINANCE LIMITED | Private company limited by shares | Live |
| NEW UNITED LIMITED | Private company limited by shares | Live |
| UNION METAL CORPORATION LIMITED | Private company limited by shares | Dissolved |
| CHINA UNION CONSTRUCTION (HONG KONG) COMPANY LIMITED | Private company limited by shares | Dissolved |
| CHINA UNION INTERNATIONAL INDUSTRIAL LIMITED | Private company limited by shares | Live |
| WISE UNION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| WORLD UNION LIMITED | Private company limited by shares | Live |
| UNITED HARVEST INVESTMENT LIMITED | Private company limited by shares | Live |
| SMART UNION LIMITED | Private company limited by shares | Live |
| UNITED GAINER LIMITED | Private company limited by shares | Dissolved |
| UNION WEALTH DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION FAME ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNION SMART HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| RICH UNION LIMITED | Private company limited by shares | Live |
| UNION MACHINERY INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| N S UNITED CO. LIMITED | Private company limited by shares | Dissolved |
| UNIDISC LIMITED | Private company limited by shares | Dissolved |
| UNIRON (H.K.) LIMITED | Private company limited by shares | Live |
| UNION PROFITS LIMITED | Private company limited by shares | Live |
| UNION WEALTH (ASIA) LIMITED | Private company limited by shares | Dissolved |
| UNISON DECOR ENTERPRISE COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNIQUE BEST LIMITED | Private company limited by shares | Live |
| UNIQUE PLANNER LIMITED | Private company limited by shares | Live |
| UNION TYRE BATTERY COMPANY LIMITED | Private company limited by shares | Live |