| UNION STAR SURVEYORS LIMITED | Private company limited by shares | Live |
| FOCUS UNION LIMITED | Private company limited by shares | Dissolved |
| UNION PEAK LIMITED | Private company limited by shares | Dissolved |
| A & A UNION (H.K.) LIMITED | Private company limited by shares | Live |
| GRAND UNION GARMENTS FACTORY LIMITED | Private company limited by shares | Live |
| Hong Kong Union of Visual Artists Limited | Company limited by guarantee | Live |
| UNION CHINA INTERNATIONAL LIMITED | Private company limited by shares | Live |
| POWER UNION LIMITED | Private company limited by shares | Dissolved |
| UNION ACE LIMITED | Private company limited by shares | Dissolved |
| 3 UNIONS PRECISION PRODUCTS COMPANY LIMITED | Private company limited by shares | Live |
| UNION ASIA ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| UNION STATE TECHNOLOGY LIMITED | Private company limited by shares | Live Commenced dormancy on 20-Aug-2010 |
| UNION HARVEST INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| STAR UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION CITY TELECOM LIMITED | Private company limited by shares | Dissolved |
| UNION GRAND (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNION TRUMP ENTERPRISES LIMITED | Private company limited by shares | Live |
| CENTURY 21 BRIGHT UNION PROPERTY CONSULTANTS LIMITED | Private company limited by shares | Live |
| GLORY UNION CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| UNION LEASING LIMITED | Private company limited by shares | Live |
| JOINT UNION LIMITED | Private company limited by shares | Live |
| WEAL UNION INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNION ELECTRONICS INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION ASIAN INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION WAY LIMITED | Private company limited by shares | Live |
| UNIONWAY (CHINA) LIMITED | Private company limited by shares | Live |
| UNION FIELD INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNION HONEST INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNION WEAL LIMITED | Private company limited by shares | Dissolved |
| UNION DYNAMIC LIMITED | Private company limited by shares | Live |
| UNION WELL INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION FORTUNE SHIPPING LIMITED | Private company limited by shares | Dissolved |
| SUMMIT UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| SOUTH UNION INVESTMENT LIMITED | Private company limited by shares | Live |
| WORLD UNION CLEARWATER LIMITED | Private company limited by shares | Dissolved |
| JOYFUL UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| SOUTHERN UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| GOLD UNION FOOTWEAR LIMITED | Private company limited by shares | Live |
| UNION MASS DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION WORLD TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION PROFIT INTERNATIONAL INDUSTRIES CO. LIMITED | Private company limited by shares | Dissolved |
| UNION FRIENDSHIP TRADE DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION APPAREL INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNION PRESTIGE LIMITED | Private company limited by shares | Dissolved |
| UNION PACIFIC CAPITAL LIMITED | Private company limited by shares | Dissolved |
| UNION FAME HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION EFFORT LIMITED | Private company limited by shares | Live |
| UNION TREASURE LIMITED | Private company limited by shares | Dissolved |
| CAN UNION LIMITED | Private company limited by shares | Live |
| UNION RAY LIMITED | Private company limited by shares | Dissolved |
| UNION CAMERA LIMITED | Private company limited by shares | Live |
| CHINA UNION CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| UNION GAIN PROPERTY SERVICE COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION SMART FOODS LIMITED | Private company limited by shares | Dissolved |
| UNION ACHIEVE DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION ACHIEVE INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| LIGHT UNION CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| UNION CITY INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| ACE UNION LIMITED | Private company limited by shares | Dissolved |
| UNION FAME (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNION EFFORT ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| UNION GALAXY LIMITED | Private company limited by shares | Dissolved |
| UNION WAY INDUSTRIAL LIMITED | Private company limited by shares | Live |
| UNION WORLD CONSTRUCTION MATERIALS COMPANY LIMITED | Private company limited by shares | Dissolved |
| BEST UNION INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| WORLD CULTURE MEDICAL UNION LIMITED | Private company limited by shares | Dissolved |
| UNION BRIGHT (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNION LIGHT INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION PLUS DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| FOCUS UNION INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| TEAM UNION INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| UNION PLUS INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| PEARL UNION INVESTMENT LIMITED | Private company limited by shares | Live |
| PINE UNION INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| PROSPER UNION LIMITED | Private company limited by shares | Dissolved |
| OCEAN UNION SEAFOOD HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION CAPITAL HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION GRAND LIMITED | Private company limited by shares | Live |
| UNION CONCORD HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| CHINA UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| SURVEY UNION ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION WISE (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| GRAND UNION (ASIA) LIMITED | Private company limited by shares | Dissolved |
| UNION PLACE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION GLORY E & M CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| UNION GLORY E & M ENGINEERING LIMITED | Private company limited by shares | Live |
| UNION FANTASY LIMITED | Private company limited by shares | Live |
| UNION STATES INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| EXPRESS UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| EVER UNION (PO YUEN) COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION TOOL HONG KONG LIMITED | Private company limited by shares | Live |
| UNION PACIFIC DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION PACIFIC INSURANCE AGENCY LIMITED | Private company limited by shares | Live |
| UNION SKY (HONG KONG) LIMITED | Private company limited by shares | Live Commenced dormancy on 06-Jan-2012 |
| UNION FORD (ASIA) LIMITED | Private company limited by shares | Dissolved |
| T. C. UNION (CHINA) LIMITED | Private company limited by shares | Live |
| UNION CATHAY TRADING LIMITED | Private company limited by shares | Live |
| UNION EARTH LIMITED | Private company limited by shares | Dissolved |
| JOYFUL UNION LIMITED | Private company limited by shares | Dissolved |
| WISE UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |