| UNION SMART ENGINEERING LIMITED | Private company limited by shares | Live |
| UNION TECH HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION STAR HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION STAR ENGINEERING LIMITED | Private company limited by shares | Live |
| UNION PACIFIC (H.K.) LIMITED | Private company limited by shares | Live |
| UNION TECHNOLOGY ASIA LIMITED | Private company limited by shares | Dissolved |
| NEW UNION TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION BELT COMPANY LIMITED | Private company limited by shares | Dissolved |
| POLY UNION ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| BEST UNION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| NEW UNION PHARMACY LIMITED | Private company limited by shares | Live |
| SMART UNION ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNION RICH HOLDINGS LIMITED | Private company limited by shares | Live |
| UNION MAX INTERNATIONAL DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION SOUND ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| UNION STYLE DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION SHINE INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION KEEN INTERNATIONAL DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| GUARD UNION TELECOM LIMITED | Private company limited by shares | Dissolved |
| SINO UNION LIMITED | Private company limited by shares | Dissolved |
| UNION PRIDE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| EVER UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| KING UNION PRODUCTS LIMITED | Private company limited by shares | Dissolved |
| BEST UNION INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| UNION COMMUNICATION ASSOCIATION LIMITED | Private company limited by shares | Dissolved |
| GOOD UNION TRADING LIMITED | Private company limited by shares | Live |
| FAMOUS UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION TOP (CHINA) LIMITED | Private company limited by shares | Live |
| FORTUNE UNION INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION FORTUNE INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| WORLD UNION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION WISE HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION FORTUNE HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION FAITH INSURANCE AGENCY LIMITED | Private company limited by shares | Live |
| UNION HONOUR HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| GLORY UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| LOYAL UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION TOWER INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| CHINA UNION TRANSPORTATION LIMITED | Private company limited by shares | Dissolved |
| INTERNATIONAL UNION PROPERTY MANAGEMENT GROUP LIMITED | Private company limited by shares | Dissolved |
| ASIAN UNION INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| FORTUNE UNION (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNION BEST (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNION ASIA (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNION EXPRESS CONSULTANTS LIMITED | Private company limited by shares | Live |
| UNION RANGE FREIGHT FORWARDERS LIMITED | Private company limited by shares | Dissolved |
| MEGA UNION INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| MEGA UNION ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNION SMART ENTERPRISES LIMITED | Private company limited by shares | Live |
| MEGA UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION CHINA LEATHER GOODS CO. LIMITED | Private company limited by shares | Dissolved |
| MEGA UNION LIMITED | Private company limited by shares | Live |
| TZU CHI CHINESE HERB UNION POLYCLINIC LIMITED | Private company limited by shares | Dissolved |
| UNION CAPITAL FINANCE LIMITED | Private company limited by shares | Dissolved |
| JADE UNION ENTERPRISE LIMITED | Private company limited by shares | Live |
| ASIA UNION TRADING LIMITED | Private company limited by shares | Dissolved |
| ASIA UNION ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| ASIA UNION INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| CHINA UNION INTERNATIONAL SHIPPING LIMITED | Private company limited by shares | Live |
| CITY UNION LIMITED | Private company limited by shares | Dissolved |
| UNION MASTER LIMITED | Private company limited by shares | Live |
| GLOBAL UNION TRADING LIMITED | Private company limited by shares | Live |
| UNION PIONEER (ASIA) LIMITED | Private company limited by shares | Live |
| CHEER UNION ENTERPRISE LIMITED | Private company limited by shares | Live |
| HONGKONG UNION INTERNATIONAL INVESTMENT CO. LIMITED | Private company limited by shares | Dissolved |
| UNION FINE TRANSPORTATION LIMITED | Private company limited by shares | Live |
| UNION ORIENTAL DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION MARKETING SERVICES LIMITED | Private company limited by shares | Dissolved |
| UNION MARK ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNION MAKE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION BLESS INVESTMENTS LIMITED | Private company limited by shares | Live |
| UNION BLESS DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| WINNING UNION LIMITED | Private company limited by shares | Dissolved |
| UNION FINE PROPERTIES LIMITED | Private company limited by shares | Dissolved |
| KEEN UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| CHINESE UNION TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION PRECISION TOOLS LIMITED | Private company limited by shares | Dissolved |
| UNION WELL GARMENT MANUFACTURING LIMITED | Private company limited by shares | Dissolved |
| FORTUNE UNION INDUSTRIAL LIMITED | Private company limited by shares | Live |
| WELL UNION SERVICES LIMITED | Private company limited by shares | Live |
| UNION SMART DESIGN & ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| GENERAL UNION (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNION CHARTER INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNION (HONG KONG) TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| FAIR UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION LUCK HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION FUNDS INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION STAR (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNION WISE TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION LEADER LIMITED | Private company limited by shares | Live |
| UNION ENTERPRISE HOLDINGS (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNION FOOD INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| RIGHT UNION LIMITED | Private company limited by shares | Dissolved |
| UNION FAITH ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| NATION UNION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION INTERNATIONAL AWARD (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNION WISE TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| UNION TRUMP LIMITED | Private company limited by shares | Dissolved |
| UNION STAR REALTY LIMITED | Private company limited by shares | Dissolved |
| SOUTH UNION HONG KONG LIMITED | Private company limited by shares | Live |