| STAR UNION TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION HOSPITAL CHARITY PROGRAM LIMITED | Company limited by guarantee | Live |
| CHINA UNION INTERNATIONAL IMP&EXP LIMITED | Private company limited by shares | Live |
| UNION ACCESS LIMITED | Private company limited by shares | Live |
| UN ARTIST & COLLECTOR UNION LIMITED | Private company limited by shares | Dissolved |
| OCEAN UNION CREATION LIMITED | Private company limited by shares | Live |
| MEGA UNION HONG KONG GROUP LIMITED | Private company limited by shares | Dissolved |
| UNITECH ENERGY SYSTEM LIMITED | Private company limited by shares | Live |
| HONG KONG UNION PROPERTY HOLDINGS LIMITED | Private company limited by shares | Live |
| UNITED ORIENT LIMITED | Private company limited by shares | Live |
| UNITED TIME INVESTMENT LIMITED | Private company limited by shares | Live |
| UNIGOLD RESOURCE LIMITED | Private company limited by shares | Live |
| UNION REGENT INVESTMENTS LIMITED | Private company limited by shares | Live |
| UNIC EVENT HONG KONG LIMITED | Private company limited by shares | Dissolved |
| Advanced Union Limited | Private company limited by shares | Dissolved |
| KING UNION (RESOURCES) LIMITED | Private company limited by shares | Live |
| HE TONG UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Uni-Electronic International (Hong Kong) Limited | Private company limited by shares | Live |
| SUPER UNION INTERNATIONAL TRADE CO., LIMITED | Private company limited by shares | Live |
| UNISON SITE SERVICES LIMITED | Private company limited by shares | Live |
| ASIA UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| SUN UNION INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| IGW United Investment Limited | Private company limited by shares | Dissolved |
| UNIONLEVER INTERNATIONAL INDUSTRY GROUP LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL DISTRIBUTION LIMITED | Private company limited by shares | Live |
| UNIND GLIDE CO., LIMITED | Private company limited by shares | Dissolved |
| Universal Assets Limited | Private company limited by shares | Dissolved |
| Union Petroleum Technology Development Co., Limited | Private company limited by shares | Dissolved |
| APOLLO UNIVERSAL LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL UNION CONSULTING CO., LIMITED | Private company limited by shares | Live |
| CENTRE UNION LIMITED | Private company limited by shares | Live |
| UNION ETERNAL DYEING FACTORY LIMITED | Private company limited by shares | Dissolved |
| SHINING UNION LIMITED | Private company limited by shares | Live |
| Union Mind Technology Co., Limited | Private company limited by shares | Dissolved |
| Liberal Union Limited | Private company limited by shares | Live |
| UNIVERSAL STAR EDUCATION LIMITED | Private company limited by shares | Live |
| UNION BEST INTERNATIONAL CORPORATION LIMITED | Private company limited by shares | Live |
| UNI-STARLIGHT INVESTMENT (HOLDING) LIMITED | Private company limited by shares | Live |
| STAR UNITY LIMITED | Private company limited by shares | Live |
| CHAMPION UNITED LIMITED | Private company limited by shares | Dissolved |
| HARMONY UNITED LIMITED | Private company limited by shares | Live |
| FLY UNIVERSAL GROUP LIMITED | Private company limited by shares | Live |
| NEW UNIVERSE RECYCLABLES LIMITED | Private company limited by shares | Live |
| SEVUITTON (YUANDONG) BRAND UNION ASSOCIATION LIMITED | Private company limited by shares | Live |
| GOLD UNION TECHNOLOGY CO., LIMITED | Private company limited by shares | Dissolved |
| CHINA ZJJG UNITED DEVELOP ACCELERATE ASSOCIATION GROUP LIMITED | Private company limited by shares | Dissolved |
| UNION PCB DEVELOPMENT CO., LIMITED | Private company limited by shares | Live |
| UNION-ARAB COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION SPORT CLUB YOUTH DEVELOPMENT LIMITED | Company limited by guarantee | Live |
| UNITED NATIONS EMERGENCY ASSITANCE CENTRE LIMITED | Private company limited by shares | Dissolved |
| UNI-TREE TRADING LIMITED | Private company limited by shares | Dissolved |
| SK UNION LIMITED | Private company limited by shares | Dissolved |
| ASIA UNION OIL SYSTEM HONG KONG LIMITED | Private company limited by shares | Live |
| UNION INDUSTRIAL DESIGN LIMITED | Private company limited by shares | Dissolved |
| Union Automatization Group Limited | Private company limited by shares | Dissolved |
| UNITED PINE LIMITED | Private company limited by shares | Dissolved |
| HANSRPBR UNITED CO., LIMITED | Private company limited by shares | Dissolved |
| International Yoga Exchange Union Limited | Private company limited by shares | Live |
| GOLDEN UNION PRO LIMITED | Private company limited by shares | Live |
| UNITED BLOOM INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION SUCCESS INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION LINK (ASIA) LIMITED | Private company limited by shares | Dissolved |
| UNI-TEAM LIMITED | Private company limited by shares | Dissolved |
| MEGA UNION GRAND PROFIT LIMITED | Private company limited by shares | Live |
| WIN UNION GRAND PROFIT LIMITED | Private company limited by shares | Dissolved |
| SPRING UNION LIMITED | Private company limited by shares | Live |
| UNITED WELL LIMITED | Private company limited by shares | Dissolved |
| UNITED ASIA PACIFIC INVESTMENT LIMITED | Private company limited by shares | Live |
| ASIA UNION INDUSTRIAL LIMITED | Private company limited by shares | Live |
| KING UNION (H.K.) LIMITED | Private company limited by shares | Live |
| GOLDEN UNION (H.K.) LIMITED | Private company limited by shares | Dissolved |
| GOLD UNIVERSAL ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNIGLORY CENTURY LIMITED | Private company limited by shares | Dissolved |
| KING UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| BIG UNION INVESTMENT LIMITED | Private company limited by shares | Live |
| GRAND UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION CITIZEN LIMITED | Private company limited by shares | Live |
| UNION GLORY INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION DIAMOND FOOD MACHINERY CO., LIMITED | Private company limited by shares | Live |
| SKY UNION INDUSTRIES LIMITED | Private company limited by shares | Live |
| UNION SPEED DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| CHINA NET COMMUNICATION UNION LIMITED | Private company limited by shares | Dissolved |
| UNITED TACT LIMITED | Private company limited by shares | Dissolved |
| BEST UNITED TECHNOLOGY LIMITED | Private company limited by shares | Live |
| UNICARE MEDIQUIP COMPANY LIMITED | Private company limited by shares | Live |
| GLOBAL WEALTH UNIVERSAL LIMITED | Private company limited by shares | Dissolved |
| UNION DATA SYSTEM (CHINA) CO., LIMITED | Private company limited by shares | Live |
| Union Straffic Intelligent System Co., Limited | Private company limited by shares | Live |
| HONG KONG UNION INFORMATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| UNION JIEYUN (HK) INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Universal Textiles Group Limited | Private company limited by shares | Dissolved |
| Union Talent Establishment Limited | Private company limited by shares | Live |
| FULL UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| FOUNDER UNISPLENDOR LIMITED | Private company limited by shares | Dissolved |
| UNION BRIGHT CREATION LIMITED | Private company limited by shares | Live |
| UNION GREAT INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNION CROWN DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION DYNASTY INTERNATIONAL LIMITED | Private company limited by shares | Live |
| SMART UNITED TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION MAX HOLDINGS LIMITED | Private company limited by shares | Live |