| Highland Union Industry Limited | Private company limited by shares | Live |
| SIFANG UNION CO., LIMITED | Private company limited by shares | Live |
| UNION YT HOLDINGS CO., LIMITED | Private company limited by shares | Live |
| Union Part Supplies Limited | Private company limited by shares | Live |
| UNION MEGA LIMITED | Private company limited by shares | Live |
| H.K. PINGTAN UNION ASSOCIATION (GENERAL) LIMITED | Company limited by guarantee | Live |
| UNION TEXTILES DYEING LIMITED | Private company limited by shares | Live |
| Union Network Worldwide Co., Limited | Private company limited by shares | Live |
| UNION (HONGKONG) INTERNATIONAL TRADE LIMITED | Private company limited by shares | Live |
| New Union ShenZhen Limited | Private company limited by shares | Live |
| UnionHive Limited | Private company limited by shares | Live |
| International Union Of Scientists Limited | Private company limited by shares | Live |
| HUB UNION (HK) CO., LIMITED | Private company limited by shares | Live |
| Union AIT Limited | Private company limited by shares | Live |
| UNION SKYWAY LIMITED | Private company limited by shares | Live |
| SINO UNION GROUP HOLDING LIMITED | Private company limited by shares | Live |
| EVER UNION CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Live |
| RAY UNION LIMITED | Private company limited by shares | Live |
| FAME UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| MAIN UNION LIMITED | Private company limited by shares | Live |
| HARBOUR UNION INVESTMENTS LIMITED | Private company limited by shares | Live |
| Alph Union (HK) Co., Limited | Private company limited by shares | Live |
| TY Union Company Limited | Private company limited by shares | Live |
| SUPREME UNION TRADING DEVELOP LIMITED | Private company limited by shares | Live |
| UNION UNIVERSE TRADING DEVELOP LIMITED | Private company limited by shares | Live |
| UNION CATERING GROUP LIMITED | Private company limited by shares | Live |
| Leopard Union Limited | Private company limited by shares | Live |
| CLOUD UNION INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| UNION MOTION GREAT CROSS GROUP LIMITED | Private company limited by shares | Live |
| CHEERING UNION LIMITED | Private company limited by shares | Live |
| GLOBAL UNION (HONG KONG) DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION TRAVEL LIMITED | Private company limited by shares | Live |
| UNION WEDDING & CELEBRATION LIMITED | Private company limited by shares | Live |
| UNION CENTRAL COMPANY LIMITED | Private company limited by shares | Live |
| LEAD UNION LIMITED | Private company limited by shares | Live |
| ALLIED UNION CORPORATION LIMITED | Private company limited by shares | Live |
| WENDY UNION LIMITED | Private company limited by shares | Live |
| Union Technology Shares Co., Limited | Private company limited by shares | Live |
| Asia Union Oceaneering Co., Limited | Private company limited by shares | Live |
| Union ICM Technology (HK) Co., Limited | Private company limited by shares | Live |
| Elite Union Consultancy Limited | Private company limited by shares | Live |
| hong kong Union Medical Limited | Private company limited by shares | Live |
| GENESIS UNION ELECTRICAL MANUFACTURING COMPANY LIMITED | Private company limited by shares | Live |
| Union Huge HK Co., Limited | Private company limited by shares | Live |
| GLOBAL UNION GROUP INVESTMENT LIMITED | Private company limited by shares | Live |
| TIME UNION TRADING DEVELOP LIMITED | Private company limited by shares | Live |
| UNION EXPRESS TRADING DEVELOP LIMITED | Private company limited by shares | Live |
| HK Sea Union International Trade Co., Limited | Private company limited by shares | Live |
| Global Union Credit Management Limited | Private company limited by shares | Live |
| Union Plus Investment Holding Co., Limited | Private company limited by shares | Live |
| UNION INDUSTRIAL TRADE CO., LIMITED | Private company limited by shares | Live |
| 3L Unions Company Limited | Private company limited by shares | Live |
| UNION DEVELOPMENT GROUP LIMITED | Private company limited by shares | Live |
| UNION WORLD GROUP LIMITED | Private company limited by shares | Live |
| UNION MAX TECHNOLOGY LIMITED | Private company limited by shares | Live |
| UNION SMOOTH TRADING DEVELOP LIMITED | Private company limited by shares | Live |
| UNION SUCCESS TRADING DEVELOP LIMITED | Private company limited by shares | Live |
| UNION FINE TRADING DEVELOP LIMITED | Private company limited by shares | Live |
| HARMONY UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION RESOURCE INTERNATIONAL LIMITED | Private company limited by shares | Live |
| ONE UNION LOGISTICS LIMITED | Private company limited by shares | Live |
| UNION GLOBAL TRADING DEVELOP LIMITED | Private company limited by shares | Live |
| UNION RICH TRADING DEVELOP LIMITED | Private company limited by shares | Live |
| China Footwear Designers Union Co., Limited | Private company limited by shares | Live |
| Union Sino AMC Limited | Private company limited by shares | Live |
| HONG KONG PAY UNION FINANCIAL SERVICES LIMITED | Private company limited by shares | Live |
| RIGHT UNION TRADING LIMITED | Private company limited by shares | Live |
| WEALTH UNION CAPITAL LIMITED | Private company limited by shares | Live |
| UNIONUP INTERNATIONAL TRAVEL LIMITED | Private company limited by shares | Live |
| UNION WONDER LIMITED | Private company limited by shares | Live |
| Union (HK) Industrial Co., Limited | Private company limited by shares | Live |
| ELITE UNION LIMITED | Private company limited by shares | Live |
| PORT UNION (H.K.) INTERNATIONAL TRADING LIMITED | Private company limited by shares | Live |
| Hongkong Union Marketing Consultation Limited | Private company limited by shares | Live |
| UNION BENEFIT LIMITED | Private company limited by shares | Live |
| EVER UNION CREATION LIMITED | Private company limited by shares | Live |
| WEALTH UNION PROPERTY CONSULTANTS LIMITED | Private company limited by shares | Live |
| VALUE UNION TRADING CO., LIMITED | Private company limited by shares | Live |
| CLAW UNION LIMITED | Private company limited by shares | Live |
| UNION FIDELITY CATERING LIMITED | Private company limited by shares | Live |
| UNION TECH INC. LIMITED | Private company limited by shares | Live |
| Asian Fitness Education Union Co., Limited | Private company limited by shares | Live |
| HK WIN UNION TECHNOLOGY GROUP LIMITED | Private company limited by shares | Live |
| WORLD TAOIST UNION LIMITED -THE- | Company limited by guarantee | Live |
| UNION COMMUNICATION CO., LIMITED | Private company limited by shares | Live |
| Excellent Quality Maid Agency Union Limited | Private company limited by shares | Live |
| UNION TREND LIMITED | Private company limited by shares | Live |
| UNION BLOOM CAPITAL LIMITED | Private company limited by shares | Live |
| Union Trust Hong Kong Limited | Public company limited by shares | Live |
| HISCO UNION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Union Smart Home Chain Co., Limited | Private company limited by shares | Live |
| Union Standard Group Limited | Private company limited by shares | Live |
| GALAXY UNION LIMITED | Private company limited by shares | Live |
| CITY UNION (HK) LIMITED | Private company limited by shares | Live |
| HONGKONG UNION INDUSTRIAL DEVELOPMENT CO., LIMITED | Private company limited by shares | Live |
| Wisdom Union Group Limited | Private company limited by shares | Live |
| HK WEST UNION ELECTRONIC TECH ENTERTAINMENT LIMITED | Private company limited by shares | Live |
| UNION WALL INTERNATIONAL GROUP LIMITED | Private company limited by shares | Live |
| Good Union Capital Co., Limited | Private company limited by shares | Live |
| ORIENT UNION TRADING DEVELOP LIMITED | Private company limited by shares | Live |