| BRIGHT UNION LIMITED | Private company limited by shares | Live |
| UNION FORCE FORWARDING (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNION RISE TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION COME (HONG KONG) LIMITED | Private company limited by shares | Live |
| UNION ENTERPRISES HOLDINGS LIMITED | Private company limited by shares | Live |
| UNION LINK GROUP HOLDINGS LIMITED | Private company limited by shares | Live |
| UNION GROUP HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION TALENT HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| SINO UNION INC. LIMITED | Private company limited by shares | Dissolved |
| STD UNION NETWORK GROUP LIMITED | Private company limited by shares | Dissolved |
| MEGA UNION INVESTMENT DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| EXPRESS UNION LIMITED | Private company limited by shares | Live |
| SOUTH UNION DEVELOPMENT HOLDING COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION FROZEN FOOD CO., LIMITED | Private company limited by shares | Dissolved |
| FUNG YING UNION LIMITED | Private company limited by shares | Live |
| MULTI UNION MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| MARK UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION HARVEST INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| FAR UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION MAX INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| POWER UNION SERVICES LIMITED | Private company limited by shares | Dissolved |
| UNION DIGITAL LIMITED | Private company limited by shares | Dissolved |
| UNION GLORY CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| UNION GLORY ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNION GLORY ENGINEERING LIMITED | Private company limited by shares | Live |
| UNION WAY (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNION SUN DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION INTERNATIONAL FINANCE (CHINA) LIMITED | Private company limited by shares | Live |
| UNION (GROUP) INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION TECH INTERNATIONAL INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| INTERNATIONAL BEAUTICIAN ASSOCIATION (ASIA PACIFIC) UNION LIMITED | Private company limited by shares | Live |
| UNION-GLORY SHIPPING CO., LIMITED | Private company limited by shares | Dissolved |
| UNION DUTY LIMITED | Private company limited by shares | Live |
| UNION STANDARD LIMITED | Private company limited by shares | Dissolved |
| DRAGON UNION CONSTRUCTION LIMITED | Private company limited by shares | Dissolved |
| UNION FIVE PRINTING PRODUCT COMPANY LIMITED | Private company limited by shares | Live |
| JET UNION ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| UNION WEALTH (H.K.) LIMITED | Private company limited by shares | Dissolved |
| WELL UNION TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION FAME (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNION HARVEST (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNION RICH INDUSTRIAL LIMITED | Private company limited by shares | Live |
| UNION HARVEST TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION WAY DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION FAME HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION RICH TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| POWER UNION JEWELLERY LIMITED | Private company limited by shares | Dissolved |
| SOUTH UNION INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION ELECTRONICS LIMITED | Private company limited by shares | Dissolved |
| UNION HIGHWAY GROUP LIMITED | Private company limited by shares | Live |
| UNION LEGEND LIMITED | Private company limited by shares | Dissolved |
| SINO UNION LIMITED | Private company limited by shares | Live |
| CITY UNION LIMITED | Private company limited by shares | Dissolved |
| HONG KONG COMMUNICATION UNION INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION PETRO EQUIPMENT LIMITED | Private company limited by shares | Dissolved |
| HONG KONG SPORT CLIMBING UNION LIMITED | Company limited by guarantee | Dissolved |
| CHINA UNION CORPORATION LIMITED | Private company limited by shares | Dissolved |
| OCEAN UNION GARMENT LIMITED | Private company limited by shares | Dissolved |
| UNION SUCCESS TRADING LIMITED | Private company limited by shares | Dissolved |
| WORLD UNIVERSITY UNION TECHNOLOGY ZONE LIMITED | Private company limited by shares | Dissolved |
| CHAMPION UNION LIMITED | Private company limited by shares | Live |
| HONGKONG TOP UNION DECORATION ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| UNION HERO INVESTMENT LIMITED | Private company limited by shares | Live Commenced dormancy on 30-May-2014 |
| CHINA UNION DAILY MEDIUM GROUP LIMITED | Private company limited by shares | Dissolved |
| UNION FULL TRADING LIMITED | Private company limited by shares | Live |
| BEST UNION CHILLED MEAT COMPANY LIMITED | Private company limited by shares | Live |
| SINO UNION FAR EAST LIMITED | Private company limited by shares | Dissolved |
| EAST UNION TRADING LIMITED | Private company limited by shares | Dissolved |
| TOTAL UNION LIMITED | Private company limited by shares | Dissolved |
| STAR UNION REALTY GROUP (HOLDING) LIMITED | Private company limited by shares | Dissolved |
| USA DEALERS UNION INTERNATIONAL GROUP LIMITED | Private company limited by shares | Live |
| UNION BRIGHT INTERNATIONAL TRADING LIMITED | Private company limited by shares | Dissolved |
| MEGA UNION INC. LIMITED | Private company limited by shares | Live |
| SINO UNION ASIA GROUP LIMITED | Private company limited by shares | Live |
| AMPLE UNION LIMITED | Private company limited by shares | Live |
| OCEAN UNION INTERNATIONAL LOGISTICS CO., LIMITED | Private company limited by shares | Live |
| UNION JOIN INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| SINO UNION LOGISTICS LIMITED | Private company limited by shares | Live |
| PACIFIC UNION (HK) LIMITED | Private company limited by shares | Dissolved |
| HONG KONG UNION PROPERTIES LIMITED | Private company limited by shares | Live |
| RIGHT UNION INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Live |
| RIGHT UNION ENTERPRISE LIMITED | Private company limited by shares | Live |
| CHINA KENNEL UNION COMPANY LIMITED | Private company limited by shares | Live |
| PARK UNION (CHINA) LIMITED | Private company limited by shares | Live |
| SINO UNION INVESTMENT DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| World Ewriter Union Limited | Private company limited by shares | Dissolved |
| NOYA UNION CO., LIMITED | Private company limited by shares | Live |
| HK UNION (CHINA) ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| A.P. UNION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION TREND ENGINEERING LIMITED | Private company limited by shares | Live |
| UNION METAL PRODUCTS INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Live |
| UNION MOTORS LIMITED | Private company limited by shares | Live |
| UNION HERO (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNION ALLIANCE LIMITED | Private company limited by shares | Dissolved |
| UNION TOP ENTERPRISES LIMITED | Private company limited by shares | Live |
| UNION HERO HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| MAIN UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| UNION WORLD INDUSTRIES LIMITED | Private company limited by shares | Live |
| UNION BASE INVESTMENTS LIMITED | Private company limited by shares | Live |
| EVER UNION GARMENTS LIMITED | Private company limited by shares | Dissolved |