| UNION KING WORLDWIDE LIMITED | Private company limited by shares | Live |
| UNION FORTUNE FAR EAST LIMITED | Private company limited by shares | Live |
| CAPITAL UNION TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION WAY INTERNATIONAL ENTERPRISES LIMITED | Private company limited by shares | Live |
| UNION CENTURY HOLDINGS LIMITED | Private company limited by shares | Live |
| SHININGHORSE UNION LIMITED | Private company limited by shares | Live |
| UNION BROTHER (CHINA) LIMITED | Private company limited by shares | Live |
| UNION BROTHER HOLDINGS (CHINA) LIMITED | Private company limited by shares | Live |
| UNION NUCLEAR ENTERPRISE LIMITED | Private company limited by shares | Live |
| UNION NELSI FASHION HONG KONG LIMITED | Private company limited by shares | Dissolved |
| UNION CENTURY INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| GRAND UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION STAR WORLDWIDE LIMITED | Private company limited by shares | Dissolved |
| AP UNION INVESTMENT (HK) COMPANY LIMITED | Private company limited by shares | Live |
| UNION SHINE ASIA LIMITED | Private company limited by shares | Dissolved |
| UNION SAILING METAL ALLOYS CO., LIMITED | Private company limited by shares | Live |
| ELITE UNION MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| WEST UNION GROUP LIMITED | Private company limited by shares | Live |
| SOCIAL ENTERPRISES UNION LIMITED | Private company limited by shares | Dissolved |
| UNION HARBOUR DEVELOPMENT LIMITED | Private company limited by shares | Live |
| Union Communication Technology Limited | Private company limited by shares | Dissolved |
| ASIAN UNION INVESTMENTS LIMITED | Private company limited by shares | Live |
| UNION OCEAN (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNION PACIFIC GROUP HOLDINGS LIMITED | Private company limited by shares | Live |
| UNION CHOICE INC. LIMITED | Private company limited by shares | Dissolved |
| UNION MICRO-ELECTRONIC LIMITED | Private company limited by shares | Dissolved |
| CYBER UNION TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Live |
| UNION WAY ASIA PACIFIC LIMITED | Private company limited by shares | Dissolved |
| WELL UNION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION (E & M) ENGINEERING CO., LIMITED | Private company limited by shares | Live |
| UNION OCEAN INDUSTRIAL (HK) LIMITED | Private company limited by shares | Dissolved |
| JET UNION (HK) LIMITED | Private company limited by shares | Live |
| UNION SKY CORPORATION LIMITED | Private company limited by shares | Dissolved |
| UNION LINK INVESTMENT DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION SYSTEM H.K LIMITED | Private company limited by shares | Dissolved |
| ALUMINUM UNION TRADING LIMITED | Private company limited by shares | Dissolved |
| NINGBO KORRECT UNION CO., LIMITED | Private company limited by shares | Live |
| UNION RICH MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| UNION ENVIRONMENT SERVICES LIMITED | Private company limited by shares | Dissolved |
| HOME-TECH UNION MANUFACTORY LIMITED | Private company limited by shares | Live |
| UNION PROFIT INTERNATIONAL DEVELOPMENT LIMITED | Private company limited by shares | Live |
| XINYI UNION COMPANY LIMITED | Private company limited by shares | Live |
| UNION ELITE LIMITED | Private company limited by shares | Dissolved |
| GLORY UNION LIMITED | Private company limited by shares | Dissolved |
| UNION STAR PROPERTIES LIMITED | Private company limited by shares | Live |
| UNION PROFIT HONG KONG INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| CHINA NON-GOVERNMENTAL ENTERPRISES UNION LIMITED | Private company limited by shares | Live |
| JUN UNION TRADE LIMITED | Private company limited by shares | Dissolved |
| HOPE UNION LIMITED | Private company limited by shares | Live |
| UNION ADVANCE LIMITED | Private company limited by shares | Dissolved |
| UNION KING INTERNATIONAL SHIPPING CO., LIMITED | Private company limited by shares | Dissolved |
| UNION A & A LIMITED | Private company limited by shares | Live |
| UNION KINETIC LIMITED | Private company limited by shares | Live |
| GREAT UNION CYCLONE GLOBAL LOGISTICS LIMITED | Private company limited by shares | Dissolved |
| HONGKONG CHINA UNION CO., LIMITED | Private company limited by shares | Dissolved |
| UNION BILLION PROPERTY AGENCY LIMITED | Private company limited by shares | Live |
| UNION POWER ENGINEERING TRADING LIMITED | Private company limited by shares | Live |
| UNION GAIN DEVELOPMENT (H.K.) LIMITED | Private company limited by shares | Live |
| GLOBAL UNION CONSULTANTS LIMITED | Private company limited by shares | Live |
| EVER UNION GROUP HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION SUCCESS ASIA PACIFIC LIMITED | Private company limited by shares | Dissolved |
| UNION INTERNATIONAL GROUP HOLDING LIMITED | Private company limited by shares | Dissolved |
| GLOBAL COMMERCIAL NEWSPAPERS UNION COMPANY LIMITED | Private company limited by shares | Live |
| LONG UNION INDUSTRIAL LIMITED | Private company limited by shares | Live |
| UNION WORLD ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| ORIENTAL INTERNATIONAL EDUCATION UNION LIMITED | Private company limited by shares | Dissolved |
| MEGA UNION INTERNATIONAL ENTERPRISE LIMITED | Private company limited by shares | Live |
| UNION OF WORLD LIU ASSOCIATION LIMITED | Company limited by guarantee | Live |
| Union Chemicals Company Limited | Private company limited by shares | Live |
| Union Chemicals (China) Company Limited | Private company limited by shares | Live |
| GREAT UNION ENVIRONMENTAL INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| TALENT UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION FIELD DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION NEW (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNION INTERNET TRADE HOLDING LIMITED | Private company limited by shares | Dissolved |
| HONG KONG MAT UNION INVESTMENT LIMITED | Private company limited by shares | Live |
| GLOBAL UNION ASIA PACIFIC LIMITED | Private company limited by shares | Dissolved |
| UNION SUN TRADING & DEVELOPMENT CO., LIMITED | Private company limited by shares | Live |
| MEGA UNION LOGISTICS LIMITED | Private company limited by shares | Live |
| UNION WALL HOLDINGS LIMITED | Private company limited by shares | Live |
| UNION CENTURY PROPERTIES LIMITED | Private company limited by shares | Dissolved |
| UNION BASE HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION SMART CORPORATION LIMITED | Private company limited by shares | Live |
| UNION CENTURY CHINA LIMITED | Private company limited by shares | Live |
| UNION CENTURY GROUP LIMITED | Private company limited by shares | Dissolved |
| UNION BASE HONG KONG GROUP LIMITED | Private company limited by shares | Live |
| RICH UNION INTERNATIONAL INDUSTRY LIMITED | Private company limited by shares | Live |
| UNION PROFIT DEVELOPMENT (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNION TECH TRADING CO., LIMITED | Private company limited by shares | Live |
| TACTFUL UNION COMPANY LIMITED | Private company limited by shares | Dissolved |
| ASIA (CHINA) INTERNATIONAL SPORT MODELING UNION LIMITED | Private company limited by shares | Dissolved |
| UNION INTERNATIONAL INVESTMENT HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION FORTUNE TRADING DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| SINO UNION TRADING DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| CHINASIA UNION CO., LIMITED | Private company limited by shares | Dissolved |
| GOLDEN UNION (H.K) INDUSTRY CO., LIMITED | Private company limited by shares | Dissolved |
| SINO UNION DEVELOP LIMITED | Private company limited by shares | Live |
| UNION SPIRIT ENTERPRISES LIMITED | Private company limited by shares | Live |
| LUCKY UNION INTERNATIONAL GROUP CO., LIMITED | Private company limited by shares | Live |
| UNION GLEAM COMPANY LIMITED | Private company limited by shares | Dissolved |