| TOP UNION TRADING LIMITED | Private company limited by shares | Live |
| UNION SINO DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION CAPITAL HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL BRAND INC LIMITED | Private company limited by shares | Live |
| UNION ALLIED LIMITED | Private company limited by shares | Dissolved |
| UNION CLASSIC LIMITED | Private company limited by shares | Dissolved |
| ASIA UNITED TRADING LIMITED | Private company limited by shares | Dissolved |
| SURPLUS UNION (HK) LIMITED | Private company limited by shares | Dissolved |
| CHINA GOLDEN UNION HOLDING LIMITED | Private company limited by shares | Live |
| UNIKIM METAL PRODUCTS CO., LIMITED | Private company limited by shares | Live |
| UNION METRO DEVELOPMENT LIMITED | Private company limited by shares | Live |
| KEEN UNION ENTERPRISE LIMITED | Private company limited by shares | Live |
| WELL UNION ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNION GREAT INVESTMENT LIMITED | Private company limited by shares | Live |
| Unihotel Systems Limited | Private company limited by shares | Live |
| UNITED SOLUTIONS GROUP LIMITED | Private company limited by shares | Live |
| UNION ON INVESTMENT LIMITED | Private company limited by shares | Live |
| Union Well International Group Limited | Private company limited by shares | Live |
| United Truth Investment Limited | Private company limited by shares | Dissolved |
| China United International Media Group Co., Limited | Private company limited by shares | Live |
| WISE UNION (HK) LIMITED | Private company limited by shares | Live |
| UNISON STRATEGY AND ASSOCIATE LIMITED | Private company limited by shares | Live |
| Trender Universal Limited | Private company limited by shares | Live |
| UNITED TECH LIMITED | Private company limited by shares | Live |
| CHARM UNION INC LIMITED | Private company limited by shares | Live |
| WIN UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| WORLD UNION (H.K.) LIMITED | Private company limited by shares | Dissolved |
| MAIN UNION TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION METRO TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION MAX LIMITED | Private company limited by shares | Live |
| UPPER UNION LIMITED | Private company limited by shares | Live |
| TOP UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION STARS LOYAL INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| UNIVERSE INDUSTRIAL TRADE CO., LIMITED | Private company limited by shares | Live |
| HK DACHENG UNION INT'L LIMITED | Private company limited by shares | Live |
| COAST UNION (HK) PETROCHEMICAL GROUP LIMITED | Private company limited by shares | Live |
| UNION POWER IMPORT AND EXPORT CO., LIMITED | Private company limited by shares | Live |
| UNION VISION ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| Unionboost Limited | Private company limited by shares | Live |
| UNION SKY JET LIMITED | Private company limited by shares | Live |
| Original Balance Of Universe (OBU) Co., Limited | Private company limited by shares | Live |
| JING UNION INTERNACIONAL (HK) LIMITED | Private company limited by shares | Live |
| UNIVERSAL CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Live |
| UNIVERSAL SOMERSET INC. LIMITED | Private company limited by shares | Live |
| UNION-POWERS LIGHTING TECHNOLOGY LIMITED | Private company limited by shares | Live |
| SMART UNITED ASIA LIMITED | Private company limited by shares | Live |
| FREE UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| GOLDEN UNION CONSULTANTS LIMITED | Private company limited by shares | Live |
| UNION PROMISE LIMITED | Private company limited by shares | Dissolved |
| MASTER UNION NETWORK (H.K.) LIMITED | Private company limited by shares | Live |
| TOP UNION CONSULTANTS LIMITED | Private company limited by shares | Live |
| GLOBAL UNION LOGISTICS CO., LIMITED | Private company limited by shares | Live |
| UNION SCORE INVESTMENTS LIMITED | Private company limited by shares | Live |
| UNIVERSE ELECTRONIC GROUP COMPANY LIMITED | Private company limited by shares | Live |
| CHINA FURNITURE INDUSTRIAL BRAND UNION LIMITED | Private company limited by shares | Live |
| UNION WISE DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION GLORY FOOTWEAR CO., LIMITED | Private company limited by shares | Live |
| Forde Union International Trading Co., Limited | Private company limited by shares | Live |
| UNITED NATURE AND HEALTH LIMITED | Company limited by guarantee | Live |
| Verdant Universe Limited | Private company limited by shares | Live |
| Unique Expo Service Limited | Private company limited by shares | Live |
| UNITED ENGLISH EDUCATION LIMITED | Private company limited by shares | Live |
| UNIVERSE INTERNATIONAL (HK) LIMITED | Private company limited by shares | Live |
| MASS UNITY LIMITED | Private company limited by shares | Live |
| UNITED BASE TRADING LIMITED | Private company limited by shares | Live |
| TOTAL UNION LIMITED | Private company limited by shares | Live |
| UNION RICH INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION STAR INTERNATIONAL (HK) LIMITED | Private company limited by shares | Live |
| WEALTH UNION INTERNATIONAL INDUSTRIAL LIMITED | Private company limited by shares | Live |
| Weida Union Group (Hongkong) Co., Limited | Private company limited by shares | Dissolved |
| UNION BOND ASIA PACIFIC LIMITED | Private company limited by shares | Live |
| FIRST UNITED LIMITED | Private company limited by shares | Live |
| WISDOM UNION ENTERPRISE LIMITED | Private company limited by shares | Live |
| Creation Union Development Limited | Private company limited by shares | Live |
| UNION TRADING DEVELOP LIMITED | Private company limited by shares | Live |
| GOLDEN UNION INTERNATIONAL ENTERPRISES LIMITED | Private company limited by shares | Live |
| GOLDEN UNION INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Live |
| UNION LEADER INTERNATIONAL LIMITED | Private company limited by shares | Live |
| CROWN UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| NOBLE UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION WEALTH INVESTMENTS LIMITED | Private company limited by shares | Live |
| WORLD UNION (ASIA) LIMITED | Private company limited by shares | Live |
| UNIGLOBE INTERNATIONAL PVT LIMITED | Private company limited by shares | Live |
| UNIVERSAL WISDOM INC LIMITED | Private company limited by shares | Live |
| UNITED GLORY INC LIMITED | Private company limited by shares | Live |
| SLK&GA UNITED LIMITED | Private company limited by shares | Live |
| WEALTH UNIVERSE INVESTMENTS LIMITED | Private company limited by shares | Live |
| THERAPEDIC (UNITED) COMPANY LIMITED | Private company limited by shares | Live |
| UNIPRO (SHANDONG) TECHNOLOGY GROUP CO., LIMITED | Private company limited by shares | Live |
| WORLD UNION INTERNATIONAL TRADING LIMITED | Private company limited by shares | Live |
| UNIFIED GLOBAL LIMITED | Private company limited by shares | Dissolved |
| ISRAEL HAIFA UNION MINING LIMITED | Private company limited by shares | Live |
| Aura Universal Limited | Private company limited by shares | Live |
| MASTER UNION ENTERPRISE LIMITED | Private company limited by shares | Live |
| UNITY FUTURE OPTIMIZER (UFO) COMPANY LIMITED | Private company limited by shares | Live |
| HONG KONG GREAT UNION LIMITED | Private company limited by shares | Live |
| UNION POWER & LIGHTING TECHNOLOGY LIMITED | Private company limited by shares | Live |
| SINO CHINESE UNION (INTERNATIONAL) LIMITED | Private company limited by shares | Live |
| UNIVERSAL CREATIONS CO., LIMITED | Private company limited by shares | Live |
| Osman Star Universal Company Limited | Private company limited by shares | Live |