| 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 |
| TREASURE UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| JET UNION TRANSPORTATION LIMITED | Private company limited by shares | Dissolved |
| CHINA SEA INTERNATIONAL (UNION) COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION HOLDING LIMITED | Private company limited by shares | Live |
| EURASIA & AMERICA ENTERPRISES UNION LIMITED | Private company limited by shares | Dissolved |
| UNION BRIGHT ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNION CORPORATE HK LIMITED | Private company limited by shares | Dissolved |
| UNION FINANCIAL SERVICES CORPORATION (H.K.) LIMITED | Private company limited by shares | Dissolved |
| WINNER UNION INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| TOP CLIMBING UNION (HK) LIMITED | Private company limited by shares | Dissolved |
| UNION CHANNEL LIMITED | Private company limited by shares | Dissolved |
| UNION TRADERS LIMITED | Private company limited by shares | Dissolved |
| GLOBAL UNION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION TEXTILES LIMITED | Private company limited by shares | Live |
| UNION KINETIC LIMITED | Private company limited by shares | Dissolved |
| UNION TECK ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| FAR EAST UNION INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION TARGET CORPORATION LIMITED | Private company limited by shares | Dissolved |
| UNION FINE TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| UNION SYSTEM LIMITED | Private company limited by shares | Live Commenced dormancy on 17-Feb-2015 |
| PAL UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION EAST INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| GREAT UNION FREIGHT LOGISTICS LIMITED | Private company limited by shares | Dissolved |
| UNION GAIN DEVELOPMENT ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| LONG UNION INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| GLOBE UNION LIMITED | Private company limited by shares | Dissolved |
| UNION WIN LIMITED | Private company limited by shares | Live |
| UNION SHINE TECHNOLOGY LIMITED | Private company limited by shares | Live |
| GOLDEN UNION ENGINEERING PLASTIC CO. LIMITED | Private company limited by shares | Dissolved |
| WEST UNION COMPANY LIMITED | Private company limited by shares | Live |
| CHINA EAST UNION INDUSTRY GROUP LIMITED | Private company limited by shares | Dissolved |
| GOLD UNION TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| UNION LAND PROPERTY MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| NEW UNION TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| UNION EAST ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| CHINA UNION INTERNATIONAL GROUP LIMITED | Private company limited by shares | Dissolved |
| UNION ALPHA BUSINESS SERVICES LIMITED | Private company limited by shares | Live |
| SMART UNION INTERNATIONAL (HOLDING) LIMITED | Private company limited by shares | Live |
| UNION TOP CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| UNION INTERNATIONAL INVESTMENT (HK) CO., LIMITED | Private company limited by shares | Live |
| UNION OF GARMENT MANUFACTURER COMPANY LIMITED -THE- | Private company limited by shares | Dissolved |
| WELL UNION (H.K.) LIMITED | Private company limited by shares | Live |
| UNION REHAB-TECH LIMITED | Private company limited by shares | Dissolved |
| OVERSEAS UNION LIMITED | Private company limited by shares | Live Commenced dormancy on 02-Dec-2011 |
| NEW UNION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| UNION FIRST HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| ORIENT UNION (H.K.) LIMITED | Private company limited by shares | Dissolved |
| SMART UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION HONOUR INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION CHINA TECHNOLOGY LIMITED | Private company limited by shares | Live |
| CHINA UNION GROUP (ASIA) LIMITED | Private company limited by shares | Live |
| ABBA ORIENTAL UNION LOGISTICS LIMITED | Private company limited by shares | Dissolved |
| UNION ABRASIVE (H.K.) LIMITED | Private company limited by shares | Live |
| UNION INDUSTRY (ASIA) CO., LIMITED | Private company limited by shares | Live |
| UNION SKY INDUSTRIAL LIMITED | Private company limited by shares | Live |
| UNION COMFORT ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| TOP UNION TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| UNION EAST INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION SHEEN INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION PROSPER HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| HOPE UNION ASIA LIMITED | Private company limited by shares | Dissolved |
| UNION WEALTH (CHINA) LIMITED | Private company limited by shares | Dissolved |
| ASCENT UNION LIMITED | Private company limited by shares | Dissolved |
| UNION ASCENT INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| FAME UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| SURE UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Silver Union International Holdings Limited | Private company limited by shares | Live |
| STAR UNION INVESTMENT (CHINA) COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION FIRST (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNION INTERNATIONAL INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| UNION MANAGEMENT & CLEANING COMPANY LIMITED | Private company limited by shares | Live |
| GOLD SOURCE UNION LIMITED | Private company limited by shares | Dissolved |
| UNION GROUP (HONG KONG) COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION SKY ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| TOP UNION ENGINEERING LIMITED | Private company limited by shares | Live |
| UNION GROWTH DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| HOPE UNION (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNION TALENT (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| ASIA UNION NETWORK TECHNOLOGY LIMITED | Private company limited by shares | Live |
| PAINTBALL UNION (HONG KONG) LIMITED | Private company limited by shares | Live |
| ASIA UNION LIMITED | Private company limited by shares | Dissolved |
| MARK UNION LIMITED | Private company limited by shares | Live |
| UNION MILLENNIUM TRADING DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION STAR (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNION LINK FINANCE LIMITED | Private company limited by shares | Live |
| UNION LINK LOGISTICS LIMITED | Private company limited by shares | Dissolved |
| UNION LINK (CHINA) LIMITED | Private company limited by shares | Live |
| FULL UNION LOGISTICS LIMITED | Private company limited by shares | Dissolved |
| UNION PROFIT GARMENTS LIMITED | Private company limited by shares | Live |
| SINO UNION INVESTMENT (HK) LIMITED | Private company limited by shares | Dissolved |
| SINO UNION INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Live |
| TECH UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| SILVER UNION ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| EVER UNION INTERNATIONAL DEVELOPMENT LIMITED | Private company limited by shares | Live |
| EVER UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| RONGSHENG UNION INVESTMENT (HONG KONG) LIMITED | Private company limited by shares | Dissolved |