| SUNSTAR UNION LIMITED | Private company limited by shares | Dissolved |
| DOMAIN UNION LIMITED | Private company limited by shares | Dissolved |
| WORLD CHINESE CULTURE & ART UNION LIMITED | Private company limited by shares | Dissolved |
| NATIONAL UNION INDUSTRIAL LIMITED | Private company limited by shares | Live |
| FRANCE UNION LIHUA (H.K) LIMITED | Private company limited by shares | Dissolved |
| ORIENTAL UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| MEGA UNION ENGINEERING LIMITED | Private company limited by shares | Live |
| Oriental Union Int'l Industrial Limited | Private company limited by shares | Live |
| UNION KING (HONG KONG) LIMITED | Private company limited by shares | Live |
| CHINAWAY UNION LIMITED | Private company limited by shares | Dissolved |
| UNION DEVELOPMENT ENGINEERING INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION ACE DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| SUNLIGHT UNION INDUSTRIAL LIMITED | Private company limited by shares | Live |
| HONG KONG UNION INTERNATIONAL FURNITURE COMPANY LIMITED | Private company limited by shares | Dissolved |
| INTERNATIONAL UNION FOUNDATION LIMITED | Private company limited by shares | Dissolved |
| SINO-RESOURCE UNION TECH. COMPANY LIMITED | Private company limited by shares | Live |
| UNION GROUP LIMITED | Private company limited by shares | Live |
| UNION GROUP ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| WORLD UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION FAVOUR INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| PAN UNION LOGISTICS LIMITED | Private company limited by shares | Dissolved |
| UNION WIDE MARKET MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| UNION WIDE INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Total Union PCB Recycle Limited | Private company limited by shares | Live |
| UNION SEMICONDUCTOR (HK) LIMITED | Private company limited by shares | Live |
| UNION INT'L (HONGKONG) GROUP CO., LIMITED | Private company limited by shares | Live |
| WIDE UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION NATION INVESTMENTS LIMITED | Private company limited by shares | Live |
| SOUTH UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| HOST UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION SINO TRADING LIMITED | Private company limited by shares | Live |
| UNION LUCKY DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION WEALTHY (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| Union Consolidated Transport (Hong Kong) Limited | Private company limited by shares | Dissolved |
| UNION ENERGY SOURCES ENGINEERING TECHNOLOGY LIMITED | Private company limited by shares | Live |
| FORT UNION LIMITED | Private company limited by shares | Live |
| SINO UNION HONG KONG INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| CHINA INTERNATIONAL WINE INDUSTRY UNION LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL UNION INCORPORATION LIMITED | Private company limited by shares | Dissolved |
| STAR UNION SKYKEE INTERNATIONAL MEDIA LIMITED | Private company limited by shares | Live |
| UNION MOMENTUM (HONG KONG) INTERNATIONAL LIMITED | Private company limited by shares | Live |
| MAIN UNION (H.K.) LIMITED | Private company limited by shares | Live |
| UNION LINKS HONG KONG COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION PERFECT LIMITED | Private company limited by shares | Live |
| UNION TREASURE LIMITED | Private company limited by shares | Dissolved |
| Union Electric Steel (Hong Kong) Limited | Private company limited by shares | Live |
| UNION GOOD ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| GLOBAL UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| EASE UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Xinmei Union Hong Kong Limited | Private company limited by shares | Dissolved |
| UNION PROPERTIES LIMITED | Private company limited by shares | Live |
| UNION HOPE LIMITED | Private company limited by shares | Live Commenced dormancy on 25-Apr-2014 |
| PROGRESS UNION LIMITED | Private company limited by shares | Live |
| STRONG UNION GROUP LIMITED | Private company limited by shares | Live |
| UNION HONG KONG INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| BIG UNION LIMITED | Private company limited by shares | Live |
| JOY UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| SINO UNION WORLDWIDE LIMITED | Private company limited by shares | Dissolved |
| BEST UNION INVESTMENT DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION STAR INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Live |
| UNION OCEAN INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| NEW UNION INTERNATIONAL INVESTMENTS LIMITED | Private company limited by shares | Live |
| UNITED WELFARE UNION HONG KONG LIMITED | Company limited by guarantee | Live |
| MODERN UNION LIMITED | Private company limited by shares | Dissolved |
| FIRST UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION VICTOR INVESTMENT LIMITED | Private company limited by shares | Live |
| LINK UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION WELL ENTERPRISE LIMITED | Private company limited by shares | Live |
| UNION FIELD (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| POWER UNION LIMITED | Private company limited by shares | Live |
| UNION PARK GROUP LIMITED | Private company limited by shares | Dissolved |
| UNION RISING (HONG KONG) LIMITED | Private company limited by shares | Live |
| UNION PATH ENTERPRISES LIMITED | Private company limited by shares | Live |
| UNION PATH DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION FORTUNE INTERNATIONAL TRADING GROUP LIMITED | Private company limited by shares | Dissolved |
| UNION STEEL RESOURCES CO., LIMITED | Private company limited by shares | Dissolved |
| SUN UNION RIVER COMPANY LIMITED | Private company limited by shares | Live |
| 3N UNION CO., LIMITED | Private company limited by shares | Dissolved |
| MODERN UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Team Union Limited | Private company limited by shares | Live |
| UNION RICH ASIA PACIFIC LIMITED | Private company limited by shares | Live |
| PROGRESS UNION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| ORIENTAL UNION HOLDINGS DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| G.M.L UNION ENTERPRISE LIMITED | Private company limited by shares | Live |
| SHANGHAI CHINA UNION FUN EQUIPMENT CO., LIMITED | Private company limited by shares | Live |
| UNION NATURAL HOLDINGS LIMITED | Private company limited by shares | Live |
| Empire Union (ASIA) Limited | Private company limited by shares | Dissolved |
| UNION CORPORATION (HONG KONG) LIMITED | Private company limited by shares | Live |
| UNION ROCK LIMITED | Private company limited by shares | Dissolved |
| FINE UNION INTERNATIONAL DEVELOPMENT LIMITED | Private company limited by shares | Live Commenced dormancy on 02-Jun-2009 |
| UNION WORLD (CHINA) LIMITED | Private company limited by shares | Dissolved |
| UNION WORLD INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| CENTURY UNION LIMITED | Private company limited by shares | Dissolved |
| UNION GLOBE LIMITED | Private company limited by shares | Dissolved |
| COSMOS UNION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| GENESIS UNION DEVELOPMENT (HK) COMPANY LIMITED | Private company limited by shares | Dissolved |
| CHEER UNION AGRICULTURAL DEVELOPMENT (GUANGXI) LIMITED | Private company limited by shares | Dissolved |
| MEGA UNION GROUP HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| ZHUHAI UNION LEASING COMPANY LIMITED | Private company limited by shares | Dissolved |
| Union Development Asia Limited | Private company limited by shares | Live |