| DRAGON UNION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| CLEVER UNION LIMITED | Private company limited by shares | Live |
| UNI-SKY CREATION LIMITED | Private company limited by shares | Live |
| CHN UNIVERSITY GLOBAL CAMPUS CHINA LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL PROTECH LIMITED | Private company limited by shares | Live |
| UNIVERSAL TRADE FAR EAST LIMITED | Private company limited by shares | Dissolved |
| UNISAT ELECTRONICS CO., LIMITED | Private company limited by shares | Dissolved |
| UNION LEADING LIMITED | Private company limited by shares | Dissolved |
| SRG UNITED ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNITED TASK IN MOVEMENT EDUCATION COMPANY LIMITED | Private company limited by shares | Dissolved |
| BEST UNIQUE LIMITED | Private company limited by shares | Dissolved |
| UNION STEP LIMITED | Private company limited by shares | Dissolved |
| UNITED WAVE LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL ROBOT TECH. LIMITED | Private company limited by shares | Live |
| UNION LUBRICANT INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| UNION PACIFIC LIMITED | Private company limited by shares | Dissolved |
| UNION ACCESS LIMITED | Private company limited by shares | Dissolved |
| GOTONE UNION PAY LIMITED | Private company limited by shares | Live |
| UNITRANS GROUP LIMITED | Private company limited by shares | Dissolved |
| UNION SINO INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNISON ASIA GROUP LIMITED | Private company limited by shares | Live |
| UNION WIN INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| UNITED LUCKY LIMITED | Private company limited by shares | Live |
| UNIQUE GLORY LIMITED | Private company limited by shares | Live |
| UNION TREASURE INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION RUBBER INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNITEELECTRON LIMITED | Private company limited by shares | Dissolved |
| UNION EXCHANGE LIMITED | Private company limited by shares | Live |
| Sun Union Watch Limited | Private company limited by shares | Live |
| UNION WORLD TECHNOLOGY DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| GLOBAL UNION TRADE & INVESTMENT CO., LIMITED | Private company limited by shares | Live |
| UNIVERSE INDUSTRY LIMITED | Private company limited by shares | Dissolved |
| UNION CONSULTANT CO. LIMITED | Private company limited by shares | Dissolved |
| GRAND UNION GARMENT WORKS LIMITED | Private company limited by shares | Live |
| HK WORLD UNION COMMUNICATION COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION WINNER INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| EAST UNION (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNICON LOGISTICS ASIA LIMITED | Private company limited by shares | Live |
| TRILLION UNION LIMITED | Private company limited by shares | Live |
| SURE UNION LIMITED | Private company limited by shares | Live |
| SPREAD UNION LIMITED | Private company limited by shares | Dissolved |
| UNION ELECTRONICS INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| TOP UNION CORPORATION LIMITED | Private company limited by shares | Live |
| ASIA PACIFIC UNITED MEDICAL GROUP (HK) LIMITED | Private company limited by shares | Dissolved |
| UNION LEATHER HOLDING LIMITED | Private company limited by shares | Live |
| UNION BRIGHT HONG KONG DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION LINK PROPERTIES LIMITED | Private company limited by shares | Live |
| UNION EXCEL MANAGEMENT LIMITED | Private company limited by shares | Live |
| BRAIN UNION LIMITED | Private company limited by shares | Live |
| UNITED TOP INVESTMENT LIMITED | Private company limited by shares | Live |
| UNIONLINK (HONG KONG) INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNION GRAND INVESTMENT LIMITED | Private company limited by shares | Live |
| ORIENTAL UNION INTERNATIONAL TRADING LIMITED | Private company limited by shares | Dissolved |
| CHINA UNION INTERNATIONAL TRADE PROMOTION COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION PACIFIC GROUP LIMITED | Private company limited by shares | Dissolved |
| HONET UNITED LIMITED | Private company limited by shares | Live |
| KLC UNDERWEAR MANUFACTURING LIMITED | Private company limited by shares | Dissolved |
| UNION WIN ELECTRONICS INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION GROUP (ASIA) LIMITED | Private company limited by shares | Dissolved |
| JETCO UNIVERSAL LIMITED | Private company limited by shares | Dissolved |
| UNISON FAR EAST LIMITED | Private company limited by shares | Dissolved |
| UNIPHARM LIMITED | Private company limited by shares | Live Commenced dormancy on 02-Jul-2015 |
| UNIQUE TALENT LIMITED | Private company limited by shares | Live |
| UNIQUE ACHIEVE LIMITED | Private company limited by shares | Dissolved |
| SOUTHERN UNITED ENTERPRISE LIMITED | Private company limited by shares | Live |
| UNION PAY ONLINE SOLOTOUR COMPANY LIMITED | Private company limited by shares | Dissolved |
| Union Scientific Co., Limited | Private company limited by shares | Dissolved |
| HONG KONG HEALTH AND BEAUTY UNION LIMITED | Company limited by guarantee | Live |
| UNION RENHE (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNIWAY ENTERPRISE (HK) LIMITED | Private company limited by shares | Dissolved |
| UNIWAY INTERNATIONAL (HK) LIMITED | Private company limited by shares | Dissolved |
| UNI-SMART ASIA PACIFIC LIMITED | Private company limited by shares | Dissolved |
| SINO-EUROPEAN (UNION) ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| UNION WIN CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| GOLD UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION YOHO LIMITED | Private company limited by shares | Dissolved |
| UNICON BUILDING MATERIALS LIMITED | Private company limited by shares | Live |
| UNION SKY TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| FORTUNE UNION ENTERPRISES (HK) LIMITED | Private company limited by shares | Live |
| HIGHLAND UNION INDUSTRY LIMITED | Private company limited by shares | Dissolved |
| UNION OCEAN INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNIVERSE ENGINEERING CONTRACTORS LIMITED | Private company limited by shares | Dissolved |
| UNION INC. LIMITED | Private company limited by shares | Dissolved |
| UNI-BUSINESS LIMITED | Private company limited by shares | Live |
| BEAUTY UNION LIMITED | Private company limited by shares | Dissolved |
| UNITED HORIZON HOLDING COMPANY LIMITED | Private company limited by shares | Dissolved |
| OPTIMUM UNIVERSE CO. LIMITED | Private company limited by shares | Dissolved |
| NICE UNION LIMITED | Private company limited by shares | Live |
| FAST UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNI-PLUS TRADING LIMITED | Private company limited by shares | Dissolved |
| FRANCE ARTWEAR UNDERWEAR AND APPAREL (HONG KONG) LIMITED | Private company limited by shares | Live |
| UNI-GAIN SHIPPING (ASIA) LIMITED | Private company limited by shares | Live |
| UNION OCEAN TEXTILE LIMITED | Private company limited by shares | Live |
| HK UNION IMPORT & EXPORT LIMITED | Private company limited by shares | Dissolved |
| 3A UNITECH INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| ASIA UNION ENTERPRISES LIMITED | Private company limited by shares | Live |
| NINGBO UNITED COUPLING CO., LIMITED | Private company limited by shares | Dissolved |
| UNION TALENT INVESTMENT LIMITED | Private company limited by shares | Live Commenced dormancy on 10-Feb-2012 |
| UNIVERSAL DISPLAY TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Dissolved |
| SOUTH UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |