| UNION SPACE SERVICES COMPANY LIMITED | Private company limited by shares | Live |
| MARITIME UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| BIG UNION TRADING LIMITED | Private company limited by shares | Live |
| UNION SOURCE TECHNOLOGY (HK) LIMITED | Private company limited by shares | Live |
| KONG HING UNION CONSTRUCTION CONSULTANTS LIMITED | Private company limited by shares | Live |
| Union Printing & Imaging Company Limited | Private company limited by shares | Live |
| Union Display Technology Limited | Private company limited by shares | Live |
| FREE UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| J & H UNION-TRANSPORT CO., LIMITED | Private company limited by shares | Live |
| UNION GRACE INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Dayang Talent International Union Group Limited | Private company limited by shares | Live |
| NINGBO UNION APPAREL FACTORY LIMITED | Private company limited by shares | Live |
| SKYWARD UNION LIMITED | Private company limited by shares | Live |
| LINYI ENOOY UNION INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| UNION GAMING SECURITIES ASIA LIMITED | Private company limited by shares | Live |
| FRENCH BAIYI UNION (HK) DRESS LIMITED | Private company limited by shares | Live |
| NEW MOON UNION LIMITED | Private company limited by shares | Dissolved |
| UNION CAPITAL MANAGEMENT (ASIA) CO., LIMITED | Private company limited by shares | Live |
| Med Union Express Co., Limited | Private company limited by shares | Live |
| FORTUNE UNION INC LIMITED | Private company limited by shares | Live |
| WORLD EDUCATION CULTURE ADVANCE UNION LIMITED | Private company limited by shares | Live |
| UNION NETWORK DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION CITY INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION EXCEL (HONG KONG) LIMITED | Private company limited by shares | Live |
| Zhuoyue Union International Group Co., Limited | Private company limited by shares | Live |
| Union Currency Exchange Co. Limited | Private company limited by shares | Live |
| GOLDCITY INTERNATIONAL TRADE UNION GROUP LIMITED | Private company limited by shares | Live |
| UNION COMMERCIAL LIMITED | Private company limited by shares | Live |
| MHT UNION LIMITED | Private company limited by shares | Dissolved |
| Union Sky Industry Co., Limited | Private company limited by shares | Live |
| UNION CROWN GROUP LIMITED | Private company limited by shares | Dissolved |
| UNION CODE LIMITED | Private company limited by shares | Live |
| OCEAN UNION AIR CONDITIONING & ENGINEERING LIMITED | Private company limited by shares | Live |
| HUAYI UNION (CHINA) INVESTMENT LIMITED | Private company limited by shares | Live |
| JET UNION TRANSPORT LIMITED | Private company limited by shares | Live |
| UNION RICH FOOTWEAR LIMITED | Private company limited by shares | Live |
| UNION RICH CRANE TRUCK TRANSPORTATION LIMITED | Private company limited by shares | Live |
| JOINT UNION INC LIMITED | Private company limited by shares | Live |
| UNION GIANT INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION WINNER (HONG KONG) LIMITED | Private company limited by shares | Live |
| UNION DENTAL LIMITED | Private company limited by shares | Live |
| RISING UNION (HK) LIMITED | Private company limited by shares | Live |
| GOLDEN UNION WORLDWIDE LIMITED | Private company limited by shares | Live |
| STONE CARE VD UNION LIMITED | Private company limited by shares | Live |
| UNION MOBILE LIMITED | Private company limited by shares | Live |
| UNION STRENGTH DEVELOPMENT (HONG KONG) LIMITED | Private company limited by shares | Live |
| UNION KEEN LIMITED | Private company limited by shares | Live |
| UNION WELL CORPORATION LIMITED | Private company limited by shares | Dissolved |
| Eurasian International Union (Italy) Limited | Private company limited by shares | Live |
| BEENAT UNION BEARING INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| EVER UNION LIMITED | Private company limited by shares | Dissolved |
| HONG KONG HEALTH UNION CO., LIMITED | Private company limited by shares | Live |
| EAST UNION TRADING LIMITED | Private company limited by shares | Live |
| EASTERN UNION LIMITED | Private company limited by shares | Live |
| MODERN UNION LIMITED | Private company limited by shares | Live |
| Excellent Union Technology (HongKong) Co., Limited | Private company limited by shares | Dissolved |
| Shenzhen Top Union Technology Co., Limited | Private company limited by shares | Live |
| UNION HOPE DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION OCEAN ENTERPRISES LIMITED | Private company limited by shares | Live |
| China Union Energy Limited | Private company limited by shares | Live |
| CITY UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| SKY UNION CONSULTANTS LIMITED | Private company limited by shares | Live |
| HARBOUR UNION INDUSTRIAL LIMITED | Private company limited by shares | Live |
| UNION LINK GARMENT LIMITED | Private company limited by shares | Live |
| Green China Construction Engineering Union Limited | Private company limited by shares | Live |
| WELL UNION INDUSTRIES LIMITED | Private company limited by shares | Live |
| RICH UNION ENTERPRISES DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION CASTLE INTERNATIONAL LIMITED | Private company limited by shares | Live |
| ACE UNION LIMITED | Private company limited by shares | Live |
| TURBO UNION LIMITED | Private company limited by shares | Live |
| HAPPY UNION TRADING LIMITED | Private company limited by shares | Live |
| WORLD UNION TRADING LIMITED | Private company limited by shares | Live |
| GPH Union (Hongkong) Co., Limited | Private company limited by shares | Live |
| CHINA DRAGON BOAT UNION CO., LIMITED | Private company limited by shares | Live |
| UNION TRADE (GLOBAL) LIMITED | Private company limited by shares | Live |
| UNION AIR CARGO LIMITED | Private company limited by shares | Live |
| UNION GALAXY ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNION FIELD INTERNATIONAL DEVELOPMENT LIMITED | Private company limited by shares | Live |
| Union Resource (HongKong) Co., Limited | Private company limited by shares | Live |
| UNION AUTO PARTS (HK) LIMITED | Private company limited by shares | Live |
| Speed Union Hong Kong Limited | Private company limited by shares | Live |
| TONG TAI UNION LIMITED | Private company limited by shares | Live |
| AGILE UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| WORLD UNION OF NURTURE LIFE ENTERPRISE LIMITED | Private company limited by shares | Live |
| New Rui Union Limited | Private company limited by shares | Dissolved |
| UNION BASE INTERNATIONAL ENTERPRISES LIMITED | Private company limited by shares | Live |
| SINO UNION MARITIME LIMITED | Private company limited by shares | Live |
| HOME UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION TOP LIMITED | Private company limited by shares | Live |
| GOOD DAY UNION LIMITED | Private company limited by shares | Live |
| UNION POWER PTY LIMITED | Private company limited by shares | Live |
| UNIONCOVER COMPANY LIMITED | Private company limited by shares | Live |
| MEGA UNION INVESTMENT HOLDINGS CO., LIMITED | Private company limited by shares | Live Commenced dormancy on 12-May-2016 |
| HOLD UNION INDUSTRIAL LIMITED | Private company limited by shares | Live |
| Union Bag Industrial Co., Limited | Private company limited by shares | Live |
| China Cardspay Union Network Co. Limited | Private company limited by shares | Live |
| Union Express Aviation Limited | Private company limited by shares | Live |
| HK YOUNG&MIDDLE-AGED BUSINESS UNION OF CHINA, LIMITED | Private company limited by shares | Live |
| UNION CHANGJIANG TRADING (HK) LIMITED | Private company limited by shares | Live |
| UNION CATERING CONCEPTS LIMITED | Private company limited by shares | Live |