| HEADSPRING UNION TARGET TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| EAST UNION INTERNATIONAL (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNION BUSINESS INT'L INDUSTRY LIMITED | Private company limited by shares | Dissolved |
| LAND UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION GRAND DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION FRIENDSHIP INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION FORTUNE (ASIA) LIMITED | Private company limited by shares | Dissolved |
| FAIR UNION (H.K.) LIMITED | Private company limited by shares | Live |
| JOIN UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION GREAT DEVELOPMENT LIMITED | Private company limited by shares | Live |
| OCEANIC UNION SHIPPING CO., LIMITED | Private company limited by shares | Dissolved |
| CHINA UNION EQUITY CO., LIMITED | Private company limited by shares | Live |
| SEA UNION SHIPPING COMPANY LIMITED | Private company limited by shares | Live |
| NEW UNION CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| MAX UNION CORPORATION LIMITED | Private company limited by shares | Live |
| UNION FAME INVESTMENT LIMITED | Private company limited by shares | Live |
| EVERBRIGHT UNION INTERNATIONAL CO., LIMITED | Private company limited by shares | Dissolved |
| NEW UNION LIMITED | Private company limited by shares | Dissolved |
| UNION BASE LIMITED | Private company limited by shares | Dissolved |
| UNION WELL INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION TOP TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| UNION BRIGHT TECHNOLOGY (CHINA) LIMITED | Private company limited by shares | Live |
| WORLD UNION PLASTIC MANUFACTURING LIMITED | Private company limited by shares | Dissolved |
| UNIONUP ELECTRONICS (HK) COMPANG LIMITED | Private company limited by shares | Live |
| UNION FORTUNE LIMITED | Private company limited by shares | Live |
| WORLD ZHEJIANG BUSINESS UNION GENERAL LIMITED | Private company limited by shares | Live |
| WORLD WENZHOU BUSINESS UNION GENERAL LIMITED | Private company limited by shares | Live |
| Metro Sham Shui Commerce Union Limited | Private company limited by shares | Live |
| SINO UNION ENTERPRISES LIMITED | Private company limited by shares | Live |
| SUCCESS UNION INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| NEW UNION INVESTMENT DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| TOP UNION INTERNATIONAL INDUSTRIAL LIMITED | Private company limited by shares | Live |
| CHINA UNION INVESTMENT SHARE CO., LIMITED | Private company limited by shares | Dissolved |
| LEADING UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION TRADE WORLDWIDE LIMITED | Private company limited by shares | Dissolved |
| EAST UNION (CHINA) METAL CO., LIMITED | Private company limited by shares | Live |
| Union Packaging and Printing Limited | Private company limited by shares | Live |
| UNION BROS. TRADING COMPANY LIMITED | Private company limited by shares | Live |
| MIRACLE UNION (GLOBAL) CO., LIMITED | Private company limited by shares | Live |
| UNION TONE INVESTMENT DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION METAL COOPERATION LIMITED | Private company limited by shares | Live |
| METRO UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| TRADING UNION LIMITED | Private company limited by shares | Dissolved |
| UNION RISING LIMITED | Private company limited by shares | Live |
| UNION EXPO LIMITED | Private company limited by shares | Dissolved |
| ADVANCE UNION LIMITED | Private company limited by shares | Dissolved |
| CHINESE ONLINE ANTI-PIRACY UNION LIMITED | Private company limited by shares | Dissolved |
| WEALTHY UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| Hong Kong Union Business Service Limited | Private company limited by shares | Live |
| UNION CREATION INVESTMENTS LIMITED | Private company limited by shares | Live |
| UNION CARGO INTERNATIONAL FORWARDER CO., LIMITED | Private company limited by shares | Live |
| UNION CONCEPT INDUSTRIAL LIMITED | Private company limited by shares | Live |
| METRO UNION LIMITED | Private company limited by shares | Dissolved |
| UNION PROFIT ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNION TEAM INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION SCORE HOLDINGS LIMITED | Private company limited by shares | Live |
| UNION SENSE INDUSTRIES LIMITED | Private company limited by shares | Live |
| UNION CENTURY TRADING LIMITED | Private company limited by shares | Live |
| Union Technology Development Co., Limited | Private company limited by shares | Dissolved |
| UNION TEAM (H.K.) LIMITED | Private company limited by shares | Live |
| UNION WATER HOLDING CO., LIMITED | Private company limited by shares | Dissolved |
| TRIPLE UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| FOREVER UNION INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| U.S.A UNION GROUP (CHINA) INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION HONEST PROPERTIES AGENCY LIMITED | Private company limited by shares | Live |
| South Union Holding Limited | Private company limited by shares | Live |
| UNION KING INTERNATIONAL (H.K.) DEVELOPMENT LIMITED | Private company limited by shares | Live |
| WIN UNION LIMITED | Private company limited by shares | Dissolved |
| UNION GLOBAL DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| EVER UNION LIMITED | Private company limited by shares | Dissolved |
| South Union Corporation Limited | Private company limited by shares | Live |
| South Union International (HK) Limited | Private company limited by shares | Live |
| UNION LINKER INDUSTRIAL LIMITED | Private company limited by shares | Live |
| SINO-US UNION TRADE GROUP CO., LIMITED | Private company limited by shares | Dissolved |
| UNION PRODUCTIONS LIMITED | Private company limited by shares | Live |
| CROWN UNION TRADING LIMITED | Private company limited by shares | Dissolved |
| HONGKONG LEFIE UNION CO., LIMITED | Private company limited by shares | Live |
| KINDLY UNION CO., LIMITED | Private company limited by shares | Dissolved |
| UNION LEADER (HONG KONG) LIMITED | Private company limited by shares | Live |
| UNION BROADBAND TELECOMMUNICATION GROUP LIMITED | Private company limited by shares | Dissolved |
| UNION EVER INVESTMENTS LIMITED | Private company limited by shares | Live |
| UNION HONEST DEVELOPMENT LIMITED | Private company limited by shares | Live |
| HONGKONG UNION CREDIT MANAGEMENT CORPORATION LIMITED | Private company limited by shares | Dissolved |
| ASIAN RUGBY FOOTBALL UNION LIMITED | Company limited by guarantee | Live |
| LUCKY UNION TRADING LIMITED | Private company limited by shares | Live |
| TRANS UNION EXPRESS LIMITED | Private company limited by shares | Live |
| YEE SHING (UNION) ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| RIGHT UNION INTERNATIONAL DEVELOPMENT LIMITED | Private company limited by shares | Live |
| CHINA ANIMATION COMMERCE INTERACTIVE UNION LIMITED | Private company limited by shares | Dissolved |
| UNION TARGET INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNION FOOD STUFF (INTERNATIONAL) COMPANY LIMITED | Private company limited by shares | Live |
| MEGA UNION HONG KONG INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION LINK ASIA GROUP LIMITED | Private company limited by shares | Live |
| FRIEND UNION LIMITED | Private company limited by shares | Live |
| UNION TRADE CORPORATION LIMITED | Private company limited by shares | Live |
| MATE UNION LIMITED | Private company limited by shares | Live |
| NEW UNION INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION RESOURCE GROUP LIMITED | Private company limited by shares | Live |
| GREAT UNION GLOBAL EXPRESS AGENCY LIMITED | Private company limited by shares | Live |
| UNION WEALTH INTERNATIONAL INVESTMENT GROUP LIMITED | Private company limited by shares | Dissolved |