| UNION GULF RESOURCES, LIMITED | Private company limited by shares | Live |
| CHAMP UNION LIMITED | Private company limited by shares | Dissolved |
| UNION SUCCESS (ASIA) LIMITED | Private company limited by shares | Dissolved |
| UNIONSTAR CHEMICALS COMPANY LIMITED | Private company limited by shares | Dissolved |
| EVER UNION ENTERPRISE LIMITED | Private company limited by shares | Live |
| UNION CHAMPION ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNION TECH TRADING LIMITED | Private company limited by shares | Dissolved |
| NATION UNION INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| NOBLE UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION VANTAGE HOLDINGS LIMITED | Private company limited by shares | Live |
| UNION CREATIVE LIMITED | Private company limited by shares | Dissolved |
| GAIN UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| CHEER UNION AGRICULTURAL DEVELOPMENT (YUNNAN) LIMITED | Private company limited by shares | Dissolved |
| ASIA UNION SATELLITE TV COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION QUARRY 101 LIMITED | Private company limited by shares | Dissolved |
| YUAN JING UNION LIMITED | Private company limited by shares | Dissolved |
| GREAT UNION TRADING LIMITED | Private company limited by shares | Live |
| UNION ACTION LIMITED | Private company limited by shares | Dissolved |
| UNION FRIEND INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION TEAM SHIPPING LIMITED | Private company limited by shares | Dissolved |
| UNION SKY INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION HOTEL MANAGEMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| ASIA UNION INFORMATION CO., LIMITED | Private company limited by shares | Live |
| BEST UNION (HONG KONG) TRADING LIMITED | Private company limited by shares | Live |
| UNION CHINA INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| NICE UNION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| CHAMP UNION INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| HK UNION INT'L GROUP LIMITED | Private company limited by shares | Dissolved |
| UNION BEST SHIPPING LIMITED | Private company limited by shares | Live |
| UNION COMFORT ADVERTISING LIMITED | Private company limited by shares | Dissolved |
| SMART UNION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION ALPHA CORPORATE ADVISORY LIMITED | Private company limited by shares | Live |
| UNION SEA TRANSPORTATION (HONG KONG) COMPANY LIMITED | Private company limited by shares | Live |
| UNION INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Live |
| FORTUNE UNION (HONG KONG) LIMITED | Private company limited by shares | Live |
| HONG KONG UNION FOOD PRODUCTS LIMITED | Private company limited by shares | Live |
| UNION LOGISTICS (H.K.) LIMITED | Private company limited by shares | Dissolved |
| FORTRESS UNION LIMITED | Private company limited by shares | Dissolved |
| FAITH UNION ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| UNION FORTUNE ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNION ALPHA LIMITED | Private company limited by shares | Dissolved |
| UNION LAND INVESTMENTS LIMITED | Private company limited by shares | Live |
| UNION KINGDOM INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION C-BUTTON CO., LIMITED | Private company limited by shares | Live |
| UNION PROFIT HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION BEAUTY CENTRE LIMITED | Private company limited by shares | Dissolved |
| SINO UNION INTERNATIONAL INVESTMENTS LIMITED | Private company limited by shares | Live |
| UNION FAITH ACCOUNTING AND SECRETARIAL LIMITED | Private company limited by shares | Dissolved |
| UNION WIN INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNION INFO COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION HERALD LIMITED | Private company limited by shares | Dissolved |
| ENGLISH-SPEAKING UNION (HONG KONG) LIMITED -THE- | Company limited by guarantee | Live |
| BRIGHT UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| SUN UNION (CHINA) LIMITED | Private company limited by shares | Live |
| SINO UNION INVESTMENT HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| STRONG UNION LIMITED | Private company limited by shares | Live |
| UNION INSTRUMENTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| MAX UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION CHAMPION LIMITED | Private company limited by shares | Live |
| SUN UNION INDUSTRIAL (HK) LIMITED | Private company limited by shares | Dissolved |
| UNION PLAZA DEVELOPMENT LIMITED | Private company limited by shares | Live |
| RICH UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| GAIN UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION PROFIT METAL PRODUCTS LIMITED | Private company limited by shares | Dissolved |
| UNION WAYS LIMITED | Private company limited by shares | Dissolved |
| EASY UNION ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| BEST UNION ENGINEERING CO., LIMITED | Private company limited by shares | Live |
| RIGHT UNION TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION RIGHT (HK) LIMITED | Private company limited by shares | Dissolved |
| CHARM UNION LIMITED | Private company limited by shares | Dissolved |
| UNION KING INTERNATIONAL HOLDING LIMITED | Private company limited by shares | Dissolved |
| SHEEN UNION INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| ASIA UNION GLOBAL LIMITED | Private company limited by shares | Live |
| UNION WAY BEAUTY LIMITED | Private company limited by shares | Dissolved |
| SHEEN UNION INVESTMENT LIMITED | Private company limited by shares | Live |
| NEW UNION SCREEN PRINTING SUPPLIES LIMITED | Private company limited by shares | Live |
| TRI UNION MERCHANDISE COMPANY LIMITED | Private company limited by shares | Dissolved |
| GRACE UNION LOGISTICS LIMITED | Private company limited by shares | Dissolved |
| UNION FOCUS TRADING LIMITED | Private company limited by shares | Live |
| UNION DECORATION & ENGINEERING CO., LIMITED | Private company limited by shares | Live |
| UNION INTERNATIONAL TRADING LIMITED | Private company limited by shares | Live |
| UNION MART LIMITED | Private company limited by shares | Dissolved |
| UNION CREATION INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNION INTERNATIONAL GROUP LIMITED | Private company limited by shares | Dissolved |
| UNION (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNION CAPITAL INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION OVERSEAS LIMITED | Private company limited by shares | Dissolved |
| UNION STAR DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| CHINA UNION INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION SHING METALS LIMITED | Private company limited by shares | Dissolved |
| GREATER UNION INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| METRO UNION INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION TEXTILE RAW MATERIALS LIMITED | Private company limited by shares | Live |
| INT'L BRAND RESEARCH DEV. UNION LIMITED | Private company limited by shares | Dissolved |
| STAR UNION WATCH INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| EUROPEAN CLOTHING GROUP (ASIAN UNION) LIMITED | Private company limited by shares | Live |
| GRAND UNION FIRE ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| TOP UNION MARITIME CO., LIMITED | Private company limited by shares | Dissolved |
| UNION MIND INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| HONG KONG UNION OUSLAN HOLDINGS LIMITED | Private company limited by shares | Live |