| VICTOR UNION INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION DIGITAL (INTERNATIONAL) COMPANY LIMITED | Private company limited by shares | Live |
| UNION STEP LIMITED | Private company limited by shares | Live |
| GB UNION CO., LIMITED | Private company limited by shares | Live |
| UNITED MORAL INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION FAITH GROUP HOLDINGS LIMITED | Private company limited by shares | Live |
| UNIDIS FOOD INTERNATIONAL LIMITED | Private company limited by shares | Live |
| HONG KONG UNION INDUSTRIAL DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION CENTRAL PROPERTIES LIMITED | Private company limited by shares | Live |
| CREATION UNION LIMITED | Private company limited by shares | Live |
| UNION RESOURCES LIMITED | Private company limited by shares | Live |
| MODERN UNITY LIMITED | Private company limited by shares | Live |
| UNION COLOUR INDUSTRIAL LIMITED | Private company limited by shares | Live |
| PURE UNITED LIMITED | Private company limited by shares | Live |
| Union Catalysts Co., Limited | Private company limited by shares | Dissolved |
| UNI-PROFIT RESOURCES LIMITED | Private company limited by shares | Dissolved |
| P&C United for Trade Limited | Private company limited by shares | Dissolved |
| A&C United Limited | Private company limited by shares | Dissolved |
| UNITED UNIVERSAL LIMITED | Private company limited by shares | Dissolved |
| WEALTHY UNION TRADING LIMITED | Private company limited by shares | Dissolved |
| UNITED CROWN ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNION PARTNERS LIMITED | Private company limited by shares | Dissolved |
| RICH UNION INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION SUCCEED LIMITED | Private company limited by shares | Live |
| PACIFIC UNION INTERNATIONAL INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| Global Design Union Limited | Private company limited by shares | Live |
| UNIVERSAL CENTURY INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION SINO INTERNATIONAL LIMITED | Private company limited by shares | Live |
| M & J UNITED LIMITED | Private company limited by shares | Live |
| UNION SINO HOLDINGS LIMITED | Private company limited by shares | Live |
| LOYAL UNION CORPORATION LIMITED | Private company limited by shares | Live |
| UNION BAGS CO., LIMITED | Private company limited by shares | Live |
| WEAL UNION LIMITED | Private company limited by shares | Live |
| UNITED FORTUNE LIMITED | Private company limited by shares | Live |
| UNION FIELD LIMITED | Private company limited by shares | Live |
| CROWN UNION ENTERPRISES LIMITED | Private company limited by shares | Live |
| POWER UNITED ASIA LIMITED | Private company limited by shares | Live |
| UNION OCEAN INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION BASE ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNION PROFIT CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| MEGA UNIT SOLUTIONS LIMITED | Private company limited by shares | Live |
| UNIFIELD LIMITED | Private company limited by shares | Live |
| UNION GREAT (HONG KONG) LIMITED | Private company limited by shares | Live |
| BIG UNION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL VICTORY LIMITED | Private company limited by shares | Live |
| RN UNION TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| EVER UNION SHIPPING LIMITED | Private company limited by shares | Live |
| UNION LINK LIMITED | Private company limited by shares | Live |
| BIG UNION (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| BIG UNION TRADING LIMITED | Private company limited by shares | Dissolved |
| HUGE UNION (ASIA) LIMITED | Private company limited by shares | Live |
| RICH UNION CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Live |
| UNION STAR TRADING LIMITED | Private company limited by shares | Live |
| UNION STAR (HONGKONG) CO., LIMITED | Private company limited by shares | Live |
| HONGKONG EASTERN UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Hong Kong Union Business Co., Limited | Private company limited by shares | Dissolved |
| EXCEL UNITY LIMITED | Private company limited by shares | Dissolved |
| HUA UNION LOGISTICS (HK) CO., LIMITED | Private company limited by shares | Live |
| UNIGLOBAL INDUSTRIAL TRADING LIMITED | Private company limited by shares | Live |
| CHINA UNION HUIJIN INVESTMENT LIMITED | Private company limited by shares | Live |
| UNIVERSAL HOROLOGY INCORPORATED LIMITED | Private company limited by shares | Live Commenced dormancy on 30-Apr-2014 |
| UNI-SOURCE ELECTRONIC (HK) LIMITED | Private company limited by shares | Live |
| UNION CHINA MINERAL RESOURCES LIMITED | Private company limited by shares | Dissolved |
| UNIENCE CO., LIMITED | Private company limited by shares | Dissolved |
| PORT UNION (H.K.) INTERNATIONAL TRADING LIMITED | Private company limited by shares | Dissolved |
| CHINA UNITED WORLD ENTERPRISE GROUP CO., LIMITED | Private company limited by shares | Dissolved |
| AUSTRALIA UNION YONGSHENG BIOTECHNOLOGY GROUP LIMITED | Private company limited by shares | Dissolved |
| UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNI-VANTAGE ASIA LIMITED | Private company limited by shares | Live |
| UNISON UNIVERSALS TRAVEL LIMITED | Private company limited by shares | Live |
| UNITED FAMILY MEDICARE LIMITED | Private company limited by shares | Live |
| UNIVERSAL CHINESE COMPANY LIMITED | Private company limited by shares | Live |
| MAN UNITED TRANSPORTATION LIMITED | Private company limited by shares | Live |
| UNION TEXTILE & GARMENT CO., LIMITED | Private company limited by shares | Dissolved |
| SOUTH UNITED CO., LIMITED | Private company limited by shares | Live |
| Hong Kong Union Investment Holdings Limited | Private company limited by shares | Live |
| UNION HAIR PRODUCTS CO., LIMITED | Private company limited by shares | Live |
| UNIQUE ABLE LIMITED | Private company limited by shares | Live |
| UNION WELL INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| TECH UNION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| UNI-VICTORY LIMITED | Private company limited by shares | Live |
| UNITED LIGHTING LIMITED | Private company limited by shares | Live |
| Union City Property Agency Limited | Private company limited by shares | Live |
| Uni-Pillars Limited | Private company limited by shares | Live |
| RAINBOW UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNITED WAVE LIMITED | Private company limited by shares | Dissolved |
| SOUTHWESTERN UNION LOGISTICS COMPANY LIMITED | Private company limited by shares | Live |
| UNION GARDENING COMPANY LIMITED | Private company limited by shares | Dissolved |
| Unique Trading Service Limited | Private company limited by shares | Live |
| WIDE UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| UNION INDUSTRIAL LIMITED | Private company limited by shares | Live |
| Royal Union Hong Kong Limited | Private company limited by shares | Live |
| UNION STEEL LIMITED | Private company limited by shares | Live |
| WORLD CHINESE COLLECTORS UNION CORPORATION LIMITED | Private company limited by shares | Live |
| UNION BASE TECHNICAL SERVICES LIMITED | Private company limited by shares | Live |
| Uni-capital Group Holding Limited | Private company limited by shares | Live |
| QINGDAO UNITED UNIVERSAL LIMITED | Private company limited by shares | Live |
| CHINA UNITED CONTINENT TAX NETWORK LIMITED | Private company limited by shares | Live |
| THREE UNION PROPERTIES LIMITED | Private company limited by shares | Live |
| UNIVERSE METAL CAN COMPANY LIMITED | Private company limited by shares | Dissolved |