| FAITH UNION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION PIONEER LIMITED | Private company limited by shares | Dissolved |
| UNIVOLT (HK) LIMITED | Private company limited by shares | Live |
| YIP UNION TRADING COMPANY LIMITED | Private company limited by shares | Live |
| UNIVOX TECHNOLOGY LIMITED | Private company limited by shares | Live |
| SINO UNION ELECTRONICS LIMITED | Private company limited by shares | Dissolved |
| UNITED FIVE CONTINENTS LIMITED | Private company limited by shares | Live |
| UNIDIGIT TECHNOLOGY CO., LIMITED | Private company limited by shares | Dissolved |
| UNION CHANCE (HONG KONG) LIMITED | Private company limited by shares | Live |
| UNION PROSPECT LIMITED | Private company limited by shares | Dissolved |
| JOIN UNITED LIMITED | Private company limited by shares | Dissolved |
| UNITED GAIN INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNION COFFEE COMPANY LIMITED | Private company limited by shares | Live |
| Unibright Contractors Limited | Private company limited by shares | Live |
| UNION VEHICLE TRADING CO., LIMITED | Private company limited by shares | Live |
| MILLION UNION (HK) INTERNATIONAL CO., LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL INC. LIMITED | Private company limited by shares | Live |
| UNIONOLE INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| CHINA UNITED FORTUNE INVESTMENT MANAGEMENT GROUP (HONGKONG) LIMITED | Private company limited by shares | Dissolved |
| RISE UNION LIMITED | Private company limited by shares | Live |
| AUTO UNION LIMITED | Private company limited by shares | Live |
| UNION GAIN INVESTMENT LIMITED | Private company limited by shares | Live |
| PARK UNION (HK) LIMITED | Private company limited by shares | Dissolved |
| INTERNATIONAL BRAND BUSINESS & INDUSTRIAL UNION LIMITED | Private company limited by shares | Live |
| ASIA WISDOM FEMALE UNION LIMITED | Private company limited by shares | Live |
| LEAGUE UNION LIMITED | Private company limited by shares | Dissolved |
| TOP UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNIVERSE ENGINEERING (HONG KONG) LIMITED | Private company limited by shares | Live |
| UNICASE (HK) CO., LIMITED | Private company limited by shares | Dissolved |
| UNION TOP INVESTMENT LIMITED | Private company limited by shares | Live |
| GLOBAL UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNIVERSAL ENERGY RESOURCES (HONG KONG) COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION ACE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION LIGHT DEVELOPMENT LIMITED | Private company limited by shares | Live |
| Unison Osaka Limited | Private company limited by shares | Dissolved |
| UNIONSTAR ELECTRONICS CO., LIMITED | Private company limited by shares | Dissolved |
| UNION CN INTERNATIONAL CO., LIMITED | Private company limited by shares | Dissolved |
| UNION HOPE HOLDINGS LIMITED | Private company limited by shares | Live |
| RUSSIA UNION CHEMICAL INDUSTRY GROUP LIMITED | Private company limited by shares | Dissolved |
| UNIVERSITY OF CHINA LIMITED -THE- | Private company limited by shares | Dissolved |
| SEA UNION INTERNATIONAL DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| KOREAN BEST UNION LIMITED | Private company limited by shares | Dissolved |
| UNION FRIEND TELECOM CO., LIMITED | Private company limited by shares | Dissolved |
| SINO UNION (ASIA) LIMITED | Private company limited by shares | Dissolved |
| UNION POINT LIMITED | Private company limited by shares | Dissolved |
| UNION ASIA PACIFIC LIMITED | Private company limited by shares | Dissolved |
| WIDE UNION INDUSTRIAL LIMITED | Private company limited by shares | Live |
| UNION ASIA ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| UNION WIN DEVELOPMENT LIMITED | Private company limited by shares | Live Commenced dormancy on 17-Feb-2009 |
| UNION LIGHT LIMITED | Private company limited by shares | Live |
| BRIGHT UNION LIMITED | Private company limited by shares | Live |
| UNILUX LIMITED | Private company limited by shares | Live |
| UNION FORCE FORWARDING (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNISSON MEDICAL LIMITED | Private company limited by shares | Live |
| WISDOM UNIVERSE LIMITED | Private company limited by shares | Live |
| UNIVERSAL RESOURCES ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| U.N.I. ELECTRONICS CO., LIMITED | Private company limited by shares | Live |
| UNI-ELEGANT 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 |
| UNIVERSAL SCIENTIFIC SOLUTIONS 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 |
| UNI. & CO. (HK) INDUSTRY COMPANY LIMITED | Private company limited by shares | Live |
| UNION TALENT HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| SINO UNION INC. LIMITED | Private company limited by shares | Dissolved |
| UNI-TRADE (ASIA) LIMITED | Private company limited by shares | Dissolved |
| UNISON CORPORATION LIMITED | Private company limited by shares | Live |
| UNITED COSMETIC HK LIMITED | Private company limited by shares | Live |
| STD UNION NETWORK GROUP LIMITED | Private company limited by shares | Dissolved |
| YING MING UNIVERSAL LIMITED | Private company limited by shares | Dissolved |
| MEGA UNION INVESTMENT DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| Sd. Universal Limited | Private company limited by shares | Live |
| EXPRESS UNION LIMITED | Private company limited by shares | Live |
| SOUTH UNION DEVELOPMENT HOLDING COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNIQ LIMITED | Private company limited by shares | Live |
| 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 |
| UNITED SUPER LIMITED | Private company limited by shares | Live |
| UNITED MOTOR SERVICE LIMITED | Private company limited by shares | Live |
| UNITED STAR INVESTMENT LIMITED | Private company limited by shares | Live |
| 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 |
| AB United Company Limited | Private company limited by shares | Live |
| POWER UNION SERVICES LIMITED | Private company limited by shares | Dissolved |
| UNION DIGITAL LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL EAST COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNI-MEGA LIMITED | Private company limited by shares | Dissolved |
| WEAL UNITY LIMITED | Private company limited by shares | Live |
| UNITED PLUS LIMITED | Private company limited by shares | Live Commenced dormancy on 20-Dec-2011 |
| CHINA UNITED INVESTMENT HOLDINGS GROUP (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNION GLORY CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| YALAN UNDERWEAR TRADING LIMITED | Private company limited by shares | Live |
| UNION GLORY ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNION GLORY ENGINEERING LIMITED | Private company limited by shares | Live |