| 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 |
| 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 |
| Union Talent Establishment Limited | Private company limited by shares | Live |
| FULL UNION INTERNATIONAL 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 |
| UNION MAX HOLDINGS LIMITED | Private company limited by shares | Live |
| FAST UNION INVESTMENT LIMITED | Private company limited by shares | Live |
| HONGKONG PERMANENT UNION INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Imagine Union Limited | Private company limited by shares | Live |
| HONGKONG UNION GROUP INVESTMENT DEVELOPMENT LIMITED | Private company limited by shares | Live |
| BROKERS UNION LIMITED | Private company limited by shares | Live |
| UNION SQUARE HOLDINGS LIMITED | Private company limited by shares | Live |
| OCEAN UNION WORLDWIDE LIMITED | Private company limited by shares | Live |
| UNION WORLD INTERNATIONAL CAPITAL LIMITED | Private company limited by shares | Live |
| UNION CENTURY (HONG KONG) LIMITED | Private company limited by shares | Live |
| UNION (ASIA) LIMITED | Private company limited by shares | Dissolved |
| CHINA UNION CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| UNION TOP PROPERTIES LIMITED | Private company limited by shares | Live |
| CHINA UNION PROPERTIES LIMITED | Private company limited by shares | Live |
| SKY UNION CORPORATION LIMITED | Private company limited by shares | Dissolved |
| SKY UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| BEST UNION PROPERTIES LIMITED | Private company limited by shares | Live |
| HONGKONG UNION CHEMICAL LIMITED | Private company limited by shares | Dissolved |
| UNION EAST HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION GRAND PROFIT LIMITED | Private company limited by shares | Dissolved |
| UNION CENTURY CONSTRUCTION HOLDINGS INT'L LIMITED | Private company limited by shares | Live |
| BEST UNIONS LIMITED | Company limited by guarantee | Live |
| RIGHT UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION ALPHA CAAP CERTIFIED PUBLIC ACCOUNTANTS LIMITED | Private company limited by shares | Live |
| SAN UNION INTERNATIONAL (HONGKONG) HOLDINGS LIMITED | Private company limited by shares | Live |
| UNION BEST INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| BEST UNION TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| FOREVER UNION INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION TOP INTERNATIONAL TRADING LIMITED | Private company limited by shares | Live |
| UNION WORLD GROUP HOLDINGS LIMITED | Private company limited by shares | Live |
| INTERNATIONAL UNION GROUP CO., LIMITED | Private company limited by shares | Live |
| ASEAN HUASHANG UNION (CHINA) CO., LIMITED | Private company limited by shares | Dissolved |
| MEGA UNION GROUP LIMITED | Private company limited by shares | Live |
| WORLD PEOPLE UNION LIMITED | Private company limited by shares | Live |
| LEAD UNION LIMITED | Private company limited by shares | Dissolved |
| UNION TOUR BUS LIMITED | Private company limited by shares | Dissolved |
| GOLD UNION INTERNATIONAL DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION GLORY INTERNATIONAL TRADING LIMITED | Private company limited by shares | Live |
| UNION RICH DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION VICTORY PROPERTIES LIMITED | Private company limited by shares | Live |
| OCEAN UNION TRADING (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNION RUBBER CO., LIMITED | Private company limited by shares | Live |
| HONOUR UNION LIMITED | Private company limited by shares | Live |
| UNION GRACE LIMITED | Private company limited by shares | Dissolved |
| UNION BEST INTERNATIONAL TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION ONE RESOURCES CO., LIMITED | Private company limited by shares | Live |
| UNION WORLD CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| EVER UNION CORPORATION LIMITED | Private company limited by shares | Live |
| M & A UNION LOGISTICS (H.K.) CO., LIMITED | Private company limited by shares | Live |
| SUPER TRI UNION ENTERPRISE COMPANY LIMITED | Private company limited by shares | Live |
| UNION WELL (H.K.) LIMITED | Private company limited by shares | Live |
| UNION POWERIC GROUP LIMITED | Private company limited by shares | Live |
| CENTRAL UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| HONGKONG WORLD UNION INTERNATIONAL TRADE LIMITED | Private company limited by shares | Dissolved |
| UNION FORTUNE INTERNATIONAL MINERAL RESOURCES LIMITED | Private company limited by shares | Dissolved |
| UNION FINE DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION TACT LIMITED | Private company limited by shares | Live |
| ACE UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| INTERNATIONAL UNION EXPRESS LIMITED | Private company limited by shares | Live |
| China Innovation Enterprise Unions Limited | Private company limited by shares | Dissolved |
| GAIN UNION ENTERPRISES LIMITED | Private company limited by shares | Live |
| COHERENT UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| MILLION UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| KINGWAY UNION ELECTRONIC GROUP CO., LIMITED | Private company limited by shares | Dissolved |
| UNION STOCK COMPANY LIMITED | Private company limited by shares | Live |
| UNION LEADER TRADING LIMITED | Private company limited by shares | Live |
| HARMONIOUS UNION LIMITED | Private company limited by shares | Live |
| ASIAN UNION INT'L BUSINESS CO., LIMITED | Private company limited by shares | Dissolved |
| UNION FAITH (H.K.) LIMITED | Private company limited by shares | Live |
| STAR UNION INVESTMENTS LIMITED | Private company limited by shares | Live |
| UNION BRIGHT INTERNATIONAL GROUP LIMITED | Private company limited by shares | Live |
| HONG KONG WONDER UNION TRADING LIMITED | Private company limited by shares | Dissolved |
| BONEX UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION SUCCESS GARMENT LIMITED | Private company limited by shares | Dissolved |
| UNION BEST INDUSTRIAL (HK) COMPANY LIMITED | Private company limited by shares | Dissolved |
| YIDE (UNION) INDUSTRIAL COMPANY LIMITED | Private company limited by shares | Live |
| UNION RISE HK CORPORATE LIMITED | Private company limited by shares | Live |
| AP's UNION LIMITED | Private company limited by shares | Dissolved |
| UNION BRIGHT INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| OCEAN UNION (ASIA) LIMITED | Private company limited by shares | Live |
| UNION TREND LIMITED | Private company limited by shares | Live |