| CROWN UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION BASE CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| UNIONBEST HONG KONG LIMITED | Private company limited by shares | Live |
| UNION GROUP INTERNATIONAL ENTERPRISE CO., LIMITED | Private company limited by shares | Live |
| LAND UNION LIMITED | Private company limited by shares | Live |
| UNION CHOICE INTERNATIONAL CREATION LIMITED | Private company limited by shares | Dissolved |
| WINNING UNION LIMITED | Private company limited by shares | Dissolved |
| UNION WIDE INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNION ON INTERNATIONAL INDUSTRIAL LIMITED | Private company limited by shares | Live |
| TOP AND UNION SOURCING COMPANY LIMITED | Private company limited by shares | Dissolved |
| HK UNION EXPORTING LIMITED | Private company limited by shares | Live |
| WORLD WIDE UNION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| HERO UNION LIMITED | Private company limited by shares | Live |
| ORIENTAL UNION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| LONG UNION LIMITED | Private company limited by shares | Dissolved |
| UNION ACHIEVED LIMITED | Private company limited by shares | Live |
| UNION WORLD SHIPPING LIMITED | Private company limited by shares | Live |
| WORLD UNION HONG KONG INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION BRIGHT HONG KONG GROUP LIMITED | Private company limited by shares | Live |
| UNION MASTER DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION INTERNATIONAL INDUSTRY (HK) LIMITED | Private company limited by shares | Dissolved |
| DE (EUROPEAN UNION) EXHIBITION SERVICE CO., LIMITED | Private company limited by shares | Live |
| UNION SUNSHINE GROUP LIMITED | Private company limited by shares | Dissolved |
| UNION TEAM CORPORATION LIMITED | Private company limited by shares | Dissolved |
| HK UNION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| WIN UNION ENTERPRISES LIMITED | Private company limited by shares | Live |
| UNION GLORY MINING LIMITED | Private company limited by shares | Dissolved |
| CROWN UNION INTERNATIONAL TRADING LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Union Energy Group Limited | Private company limited by shares | Dissolved |
| UNION FIELD ENTERPRISES LIMITED | Private company limited by shares | Live |
| UNION GLORY (HK) INT'L TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION GLORY MINING EXPLORATION LIMITED | Private company limited by shares | Live |
| CY UNION HK CO., LIMITED | Private company limited by shares | Dissolved |
| HONGKONG CHINESE UNION GROUP CO., LIMITED | Private company limited by shares | Live |
| SUN UNION INT'L CHRONIC DISEASE MANAGEMENT LIMITED | Private company limited by shares | Live |
| UNION REALTY COMPANY LIMITED | Private company limited by shares | Live |
| SUN UNION BIODEGRADABLE PLASTIC LIMITED | Private company limited by shares | Live |
| GLORY UNION GLOBAL LIMITED | Private company limited by shares | Dissolved |
| ACE UNION INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION WELL ASIA GROUP LIMITED | Private company limited by shares | Live |
| UNION FINE LUBRICATION TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| MELODY IMAGE INTERNATIONAL UNION CO., LIMITED | Private company limited by shares | Dissolved |
| UNION TREASURE INTERNATIONAL INVESTMENT COMPANY LIMITED | Private company limited by shares | Live |
| WISE UNION CORPORATION LIMITED | Private company limited by shares | Live |
| LUCKY UNION INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNION INTERNATIONAL GROUP (HK) LIMITED | Private company limited by shares | Live |
| UNION KING PACIFIC LIMITED | Private company limited by shares | Live |
| UNION LINK INTERNATIONAL INDUSTRIAL LIMITED | Private company limited by shares | Live |
| GLOBAL EDUCATION UNION CULTURE MEDIA LIMITED | Private company limited by shares | Live |
| QUEEN UNION LIMITED | Private company limited by shares | Dissolved |
| Union Morris Holdings Limited | Private company limited by shares | Live |
| CHINA UNION STEEL HOLDING CO., LIMITED | Private company limited by shares | Dissolved |
| UNION INTERNATIONAL CORPORATION LIMITED | Private company limited by shares | Dissolved |
| SINIC UNION BUSINESS CONSULTANT (HK) LIMITED | Private company limited by shares | Live |
| MEGA UNION HONG KONG DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION WELL GROUP HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| MULTI UNION FAR EAST LIMITED | Private company limited by shares | Dissolved |
| SMART UNION ENTERPRISES LIMITED | Private company limited by shares | Live |
| FOCUS MARKET UNION LIMITED | Private company limited by shares | Dissolved |
| LEGEND UNION GRAND PROFIT LIMITED | Private company limited by shares | Dissolved |
| GALA UNION GRAND PROFIT LIMITED | Private company limited by shares | Dissolved |
| UNION WELL GRAND PROFIT LIMITED | Private company limited by shares | Dissolved |
| UNION BEST GRAND PROFIT LIMITED | Private company limited by shares | Dissolved |
| UNION SUCCESS GRAND PROFIT LIMITED | Private company limited by shares | Dissolved |
| UNION CHOICE GRAND PROFIT LIMITED | Private company limited by shares | Dissolved |
| UNION LINK GRAND PROFIT LIMITED | Private company limited by shares | Dissolved |
| MEGA UNION CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| ARK UNION LIMITED | Private company limited by shares | Dissolved |
| SUPREME UNION MANAGEMENT LIMITED | Private company limited by shares | Live |
| ABLE UNION TRADING LIMITED | Private company limited by shares | Dissolved |
| TARGET UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION WORLD INTERNATIONAL SHIPPING LIMITED | Private company limited by shares | Live |
| BRIGHT UNION HONG KONG CPA LIMITED | Private company limited by shares | Live |
| UNION EXPO LIMITED | Private company limited by shares | Live |
| BRITISH UNION GROUP LIMITED | Private company limited by shares | Live |
| NATION UNION ENTERPRISES LIMITED | Private company limited by shares | Live |
| UNION VISION ENTERPRISE (INTERNATIONAL) LIMITED | Private company limited by shares | Dissolved |
| HONG KONG UNION CONTROL COMPANY LIMITED | Private company limited by shares | Live |
| SMART UNION TRADING LIMITED | Private company limited by shares | Live |
| Union Funds Credit Entertainment Limited | Private company limited by shares | Dissolved |
| Union Color Printing Limited | Private company limited by shares | Live |
| UNION GLOBAL MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| GOLDEN UNION INTERNATIONAL INVESTMENTS LIMITED | Private company limited by shares | Live |
| ASIAN UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| UNION MASTER INDUSTRIES LIMITED | Private company limited by shares | Live |
| GOLD UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| PROSPEROUS UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| International Social Union Global Mission Limited | Private company limited by shares | Live |
| EAST UNION GIFT COMPANY LIMITED | Private company limited by shares | Live |
| ASIAN TABLE TENNIS UNION LIMITED | Private company limited by shares | Live |
| UNION GAINER LIMITED | Private company limited by shares | Live |
| UNION FAITH ENTERPRISES LIMITED | Private company limited by shares | Live |
| SINO UNION (CHINA) LIMITED | Private company limited by shares | Live |
| POLY UNION LIMITED | Private company limited by shares | Dissolved |
| GLORIOUS UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| CHINA UNION STEEL CO., LIMITED | Private company limited by shares | Live |
| EVEREST UNION LIMITED | Private company limited by shares | Dissolved |
| LUCKY UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| ASIA UNION (HK) SHIPPING CO., LIMITED | Private company limited by shares | Dissolved |
| NEW UNION INTERNATIONAL TRADING LIMITED | Private company limited by shares | Live |