| UNISOFT IT LIMITED | Private company limited by shares | Live |
| Union Environmental Logistic Company Limited | Private company limited by shares | Dissolved |
| HL UNION INTERNATIONAL DEV. (H.K.) LIMITED | Private company limited by shares | Live |
| CHAT UNION CLIMAVENETA COMPANY LIMITED | Private company limited by shares | Live |
| JU CAI UNITED ENTERPRISE LIMITED | Private company limited by shares | Live |
| UNIQUE LINK COMPANY LIMITED | Private company limited by shares | Live |
| UNION (HONG KONG) TRADING CO. LIMITED | Private company limited by shares | Live |
| UNION BRIGHT TECHNOLOGY LIMITED | Private company limited by shares | Live |
| UNION EAST TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| SHARP UNION ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNION AHEAD INVESTMENT LIMITED | Private company limited by shares | Live |
| GENIUS UNION LIMITED | Private company limited by shares | Dissolved |
| SUCCESS UNION INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION CREATOR LIMITED | Private company limited by shares | Dissolved |
| WELL UNION ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| TIME UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| UNION BUILDING MATERIAL LIMITED | Private company limited by shares | Dissolved |
| ELITE UNION (HONG KONG) LIMITED | Private company limited by shares | Live |
| HONG KONG FLY UNIVERSE COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION GLORY INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| CHIU YIN CHINA & U.S.A. UNION EDUCATION LIMITED | Private company limited by shares | Dissolved |
| UNITED ADVERTISING AND EXHIBITION LIMITED | Private company limited by shares | Live |
| UNITED TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| ZHONG HAI CHEER UNION ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL EXPRESS LIMITED | Private company limited by shares | Live |
| UNION-A WORKSHOP LIMITED | Private company limited by shares | Live |
| UNIVERSAL HEALTH ASSOCIATES LIMITED | Private company limited by shares | Live |
| UNION SOLUTIONS LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL BIO-MEDICAL GROUP LIMITED | Private company limited by shares | Dissolved |
| UNITED EASTERN LIMITED | Private company limited by shares | Live |
| FRANKI UNION REMITTANCE LIMITED | Private company limited by shares | Dissolved |
| NICE UNIVERSAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| EVER UNION GARMENT TRADING (HONGKONG) LIMITED | Private company limited by shares | Live |
| UNION PLAZA (SHANGHAI) INVESTMENT LIMITED | Private company limited by shares | Live |
| AFRICA UNION INTERNATIONAL DEVELOPMENT CO., LIMITED | Private company limited by shares | Dissolved |
| UNICCA COMPANY LIMITED | Private company limited by shares | Live |
| UNION NETWORK SHIPPING CO., LIMITED | Private company limited by shares | Live |
| HONG KONG CHINESE MEDICINE PRACTITIONERS UNIFIED ASSOCIATION LIMITED | Private company limited by shares | Dissolved |
| ALL HONG KONG MARCHING BAND UNION LIMITED | Company limited by guarantee | Live |
| UNISON ELECTRONIC TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| UNION BROKER LIMITED | Private company limited by shares | Live |
| EXCEL UNITED COMPANY LIMITED | Private company limited by shares | Live Ceased dormancy on 20-Oct-2015 |
| MEGA UNIVERSAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNITED METAL MANUFACTURING COMPANY LIMITED | Private company limited by shares | Live |
| GREAT UNION METALWARE MANUFACTURER (HK) LIMITED | Private company limited by shares | Dissolved |
| UNITAR INDUSTRIAL (HONG KONG) LIMITED | Private company limited by shares | Live |
| UNION FASHION GARMENT LIMITED | Private company limited by shares | Dissolved |
| UNIVERSITY MEDICAL GROUP LIMITED | Private company limited by shares | Live |
| UNITRANS COMPANY LIMITED | Private company limited by shares | Live |
| FIRST UNIQUE LIMITED | Private company limited by shares | Dissolved |
| HONG KONG HONG CHAU UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION PLAZA (SHENZHEN) INVESTMENT LIMITED | Private company limited by shares | Live |
| UNI-ESSENCE LIMITED | Private company limited by shares | Dissolved |
| UNITY ENTERTAINMENT GROUP LIMITED | Private company limited by shares | Dissolved |
| UNITY ENTERTAINMENT & PRODUCTION LIMITED | Private company limited by shares | Dissolved |
| TOP UNION ELECTRIC LIMITED | Private company limited by shares | Dissolved |
| SMART UNION CORPORATE SERVICES LIMITED | Private company limited by shares | Dissolved |
| UNION ENTERPRISES (GROUP) LIMITED | Private company limited by shares | Dissolved |
| M-W UNIVERSE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION PRODUCTS & ENG. CO., LIMITED | Private company limited by shares | Live |
| GLOBE UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNOTRON LIMITED | Private company limited by shares | Live |
| UNIVERSAL PAKCO HOLDING LIMITED | Private company limited by shares | Dissolved |
| FORTUNE DRAGON UNIVERSAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| WELL UNITED MARITIME LIMITED | Private company limited by shares | Live |
| UNIZEX UNIVERSAL LIMITED | Private company limited by shares | Dissolved |
| UNION FIELD ENERGY & PETROCHEMICAL LIMITED | Private company limited by shares | Dissolved |
| CHINA UNION LIMITED | Private company limited by shares | Dissolved |
| INTERNATIONAL CLOUD FINANCE UNION GROUP LIMITED | Private company limited by shares | Live |
| WIN UNITED LIMITED | Private company limited by shares | Live |
| EASTERN UNION INTERNATIONAL SHIPPING CO., LIMITED | Private company limited by shares | Live |
| UNIRESGUROE CO. LIMITED | Private company limited by shares | Live |
| FORTUNE UNION INTERNATIONAL HOLDING LIMITED | Private company limited by shares | Dissolved |
| UNITED CREATIVE AGENCY LIMITED | Private company limited by shares | Dissolved |
| H.K. UNION EDUCATION LIMITED | Private company limited by shares | Dissolved |
| UNI-LINK LIMITED | Private company limited by shares | Dissolved |
| GRAND UNITED LIMITED | Private company limited by shares | Dissolved |
| UNI-FULL LIMITED | Private company limited by shares | Live |
| UNITY CHEMICALS COMPANY LIMITED | Private company limited by shares | Live |
| UNITED.COM LIMITED | Private company limited by shares | Live |
| NEW UNIVERSALS BRASS WARE FACTORY COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL ALUMINIUM ENGINEERING LIMITED | Private company limited by shares | Live |
| UNION MILLION CONSTRUCTION LIMITED | Private company limited by shares | Live |
| UNION BILLION LIMITED | Private company limited by shares | Dissolved |
| POWER UNIVERSE TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| CHINA INTERNATIONAL UNION INVESTMENT LIMITED | Private company limited by shares | Live Ceased dormancy on 02-Sep-2004 |
| UNI-WAY CONSULTANTS LIMITED | Private company limited by shares | Live |
| UNIQUE ASSET LIMITED | Private company limited by shares | Dissolved |
| UNIFYSOFT LIMITED | Private company limited by shares | Live |
| E-TRADE UNITED LIMITED | Private company limited by shares | Dissolved |
| UNION ART PRINTING INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| DONGGUAN UNIVERSAL CONSULTING COMPANY LIMITED | Private company limited by shares | Live |
| TUNG'S UNION ENGINEERING LIMITED | Private company limited by shares | Live |
| UNION POWER ENTERPRISE MANAGEMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNIMC AND COMPANY LIMITED | Private company limited by shares | Dissolved |
| CHINA ARTIST UNION GROUP LIMITED | Private company limited by shares | Live |
| ON UNION TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| ON UNION ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNITON TRADING LIMITED | Private company limited by shares | Live |
| SKY UNION (FAR EAST) LIMITED | Private company limited by shares | Live |