| NORTH BAY UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| UNION GLOBAL INVESTMENT (HK) LIMITED | Private company limited by shares | Live |
| UNION CREATION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| HFF UNION (HK) LIMITED | Private company limited by shares | Dissolved |
| ADVANCE UNION HOLDING LIMITED | Private company limited by shares | Dissolved |
| SHINETSU UNION HONG KONG LIMITED | Private company limited by shares | Live |
| UNION SQUARE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION STRONG MARINE GROUP LIMITED | Private company limited by shares | Live |
| Union Capital Group Limited | Private company limited by shares | Live |
| Union Seafood Trading Company Limited | Private company limited by shares | Dissolved |
| Union of Chinese Confucian Entrepreneurs Co., Limited | Private company limited by shares | Live |
| Mega Union Technology Corporation Limited | Private company limited by shares | Live |
| SINO UNION INTERNATIONAL EXCHANGE LIMITED | Private company limited by shares | Dissolved |
| PEACE UNION HOLDING (HK) LIMITED | Private company limited by shares | Live |
| CHINESE COLLECTORS UNION LIMITED | Private company limited by shares | Live |
| SOUTH UNION INDUSTRY DEVELOPMENT CO., LIMITED | Private company limited by shares | Live |
| BUSINESS UNION FINANCE SERVICE HOLDING LIMITED | Private company limited by shares | Live |
| Y&H UNION TECH GROUP LIMITED | Private company limited by shares | Live |
| UNION BRIGHT CONSULTANTS LIMITED | Private company limited by shares | Live |
| WORLD ECOSYSTEM ENVIRONMENTAL PROTECTION UNION LIMITED | Private company limited by shares | Dissolved |
| UNION POWER ENERGY COMPANY LIMITED | Private company limited by shares | Live |
| BEST UNION CORPORATION LIMITED | Private company limited by shares | Live |
| UNION CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| CHINA UNION INTERNATIONAL HOLDING CO., LIMITED | Private company limited by shares | Live |
| Hong Kong Architectural Design Union Limited | Company limited by guarantee | Live |
| SMART UNION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| UNION ENTERPRISES LIMITED | Private company limited by shares | Live |
| International Slow Life Union Co., Limited | Private company limited by shares | Live |
| Expert Union Engineering Limited | Private company limited by shares | Dissolved |
| JC UNION SHIPPING CO., LIMITED | Private company limited by shares | Dissolved |
| VIRTUE UNION COMPANY LIMITED | Private company limited by shares | Live |
| UNION VILLE LIMITED | Private company limited by shares | Live |
| Union Charm Investment Holding Limited | Private company limited by shares | Dissolved |
| EXTREME UNION COMPANY LIMITED | Private company limited by shares | Live |
| EAST UNION ENERGY GROUP LIMITED | Private company limited by shares | Live |
| CHINA MINMERCHANT UNION CO., LIMITED | Private company limited by shares | Live |
| INTERNATIONAL UNION CORPORATION LIMITED | Private company limited by shares | Dissolved |
| UNION DRAGON INTERNATIONAL LIMITED | Private company limited by shares | Live |
| CHINA BUSINESS UNION DEVELOPMENT CO., LIMITED | Private company limited by shares | Live |
| I-tech Union Limited | Private company limited by shares | Live |
| FANCY UNION LIMITED | Private company limited by shares | Live |
| NINGBO AJ UNION IMP &EXP CORPORATION LIMITED | Private company limited by shares | Live |
| UNION GRACE CORPORATION LIMITED | Private company limited by shares | Live |
| UNION FLOW INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| SKY UNION INVESTMENTS LIMITED | Private company limited by shares | Live |
| UNION CROWN INVESTMENTS LIMITED | Private company limited by shares | Live |
| TOP UNION TECHNIQUE (HK) CO., LIMITED | Private company limited by shares | Live |
| MIGHTY UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Golden Union Smart Card Co., Limited | Private company limited by shares | Live |
| Champion Union Trading Limited | Private company limited by shares | Live |
| SPIRIT OF THE UNION LIMITED | Private company limited by shares | Live |
| WORLD UNION GROUP HONGKONG LIMITED | Private company limited by shares | Live |
| WISDOM UNION INTERNATIONAL ENTERPRISE LIMITED | Private company limited by shares | Live |
| EASY UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION CYBER TECHNOLOGIES (ASIA) LIMITED | Private company limited by shares | Live |
| UNION EASTERN INTERNATIONAL ENTERPRISE LIMITED | Private company limited by shares | Live |
| UNION LUCKY SHIPPING LIMITED | Private company limited by shares | Dissolved |
| Union Trade Holdings Limited | Private company limited by shares | Live |
| UNION E-CIG GROUP CO., LIMITED | Private company limited by shares | Live |
| DONGGUAN HHH UNION LIMITED | Private company limited by shares | Live |
| ID UNION INTERNATIONAL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| AUSTRIAN UNION INTERNATIONAL TRADING CO., LIMITED | Private company limited by shares | Live |
| CHINA SIXIANGJIA FAMOUS WINE COLLECTION UNION INSTITUTIONS LIMITED | Private company limited by shares | Live |
| Z.X.W UNION INTERNATIONAL CO, LIMITED | Private company limited by shares | Live |
| UNION TECH HOLDING LIMITED | Private company limited by shares | Live |
| DA JING ZHU SHI UNION GROUP LIMITED | Private company limited by shares | Dissolved |
| INFORICH UNION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Nice Union & Associates Limited | Private company limited by shares | Dissolved |
| UNION POWER-TECH HOLDINGS CO., LIMITED | Private company limited by shares | Live |
| LUCKY UNION (HONG KONG) LIMITED | Private company limited by shares | Live |
| BENEFIT UNION LIMITED | Private company limited by shares | Live |
| ABLE UNION CORPORATION LIMITED | Private company limited by shares | Live |
| UNION WEALTHY INVESTMENT LIMITED | Private company limited by shares | Live |
| Union Science and Technology Co., Limited | Private company limited by shares | Dissolved |
| BRIGHT UNION INVESTMENT LIMITED | Private company limited by shares | Live |
| SPECIAL UNIONS LIMITED | Private company limited by shares | Live |
| CHEER UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION CHANGJIANG INVESTMENT (HK) LIMITED | Private company limited by shares | Live |
| HAPPY UNION CORPORATION LIMITED | Private company limited by shares | Live |
| UNION DOMINANT LIMITED | Private company limited by shares | Dissolved |
| INTERNATIONAL CHINESE BUSINESS UNION STOCK LIMITED | Private company limited by shares | Live |
| UNION PROSPER INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION PICTURES LIMITED | Private company limited by shares | Live |
| FULL UNION CORPORATION LIMITED | Private company limited by shares | Live |
| UNION GOOD CORPORATION LIMITED | Private company limited by shares | Dissolved |
| PUBLIC UNION INTERNATIONAL TRADING CO., LIMITED | Private company limited by shares | Live |
| HONGKONG 7 UNION LIMITED | Private company limited by shares | Live |
| UNION GROUP HK INT'L TRADING CO., LIMITED | Private company limited by shares | Live |
| UNION TANKERS COMPANY LIMITED | Private company limited by shares | Live |
| FANTASTIC UNION LIMITED | Private company limited by shares | Live |
| UNION LINKS COMPANY LIMITED | Private company limited by shares | Live |
| CHINA UNION ASIA PACIFIC LIMITED | Private company limited by shares | Live |
| SMART UNION CONSULTANTS LIMITED | Private company limited by shares | Live |
| CHINA ENERGY ENTERPRISE UNION LIMITED | Private company limited by shares | Dissolved |
| Asia Union International Motor Company Limited | Private company limited by shares | Live |
| EAST UNION TRADE GROUP LIMITED | Private company limited by shares | Live |
| Artman Union Co., Limited | Private company limited by shares | Live |
| CHAT UNION SICON HONG KONG COMPANY LIMITED | Private company limited by shares | Live |
| GLORY UNION CORPORATION LIMITED | Private company limited by shares | Live |
| UNION MEGA LIMITED | Private company limited by shares | Dissolved |