| UNION KIN WAH ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION TREASURE LIMITED | Private company limited by shares | Dissolved |
| UNITED PLUS LIMITED | Private company limited by shares | Dissolved |
| UNION KIND LIMITED | Private company limited by shares | Live |
| UNION ACE INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNILUCK LIMITED | Private company limited by shares | Live |
| UNI-TALENT INVESTMENTS LIMITED | Private company limited by shares | Live |
| UNI-DUTY INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNION SPARK INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION TOP INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNI-TAKE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNICRAFT COMPANY LIMITED | Private company limited by shares | Live |
| UNI-COURSE LIMITED | Private company limited by shares | Dissolved |
| UNIDEC CAD-CAM LIMITED | Private company limited by shares | Dissolved |
| UNI-ELEMENT LIMITED | Private company limited by shares | Live |
| UNI-ENVOY LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL LEAD INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI PUDAW ECONOMIC UNION LIMITED | Private company limited by shares | Dissolved |
| CHINA SHANGHAI INDUSTRY UNION LIMITED | Private company limited by shares | Dissolved |
| HEAD UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION LANE INTERNATIONAL EXCHANGE (HOLDINGS) LIMITED | Private company limited by shares | Dissolved |
| HONEST UNION INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL BOSS LIMITED | Private company limited by shares | Live |
| UNIFOODS LIMITED | Private company limited by shares | Dissolved |
| UNIYORK INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION STRONG DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNICORP PLASCHEM COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL EXHIBITION COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL DADA TOYS MANUFACTURING LIMITED | Private company limited by shares | Dissolved |
| UNION PEACE TRADING LIMITED | Private company limited by shares | Dissolved |
| UNITED SYSTEM LIMITED | Private company limited by shares | Dissolved |
| UNIQUE PLAN LIMITED | Private company limited by shares | Live |
| UNISON MELODY LIMITED | Private company limited by shares | Dissolved |
| UNISON TIMBER AGENCIES CO. LIMITED | Private company limited by shares | Dissolved |
| UNIQUE TYPESETTING LIMITED | Private company limited by shares | Dissolved |
| EVER UNION SERVICES LIMITED | Private company limited by shares | Dissolved |
| UNION STAR POLYMER COMPANY LIMITED | Private company limited by shares | Dissolved |
| CHEER UNION INVESTMENT LIMITED | Private company limited by shares | Live |
| SILVER UNION (CHINA) LIMITED | Private company limited by shares | Dissolved |
| UNION STEP LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL MARCH INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNIDEC ENTERPRISES COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNIONTEX COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNICOT LIMITED | Private company limited by shares | Live |
| UNITED KIT LIMITED | Private company limited by shares | Dissolved |
| CENTURY UNION LIMITED | Private company limited by shares | Dissolved |
| UNIONUP INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| PROUD UNION LIMITED | Private company limited by shares | Dissolved |
| UNIPRIME LIMITED | Private company limited by shares | Live |
| UNISTRONG ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| UNISTRONG INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNIDEN ELECTRONIC COMPONENTS HONG KONG LIMITED | Private company limited by shares | Dissolved |
| HEALTH UNION LIMITED | Private company limited by shares | Dissolved |
| UNION WIDE INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNI-SOURCE DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| MASS UNION INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| UNION MATE INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNION INTERIOR DESIGN & DECORATION COMPANY LIMITED | Private company limited by shares | Live |
| ELECT UNION LIMITED | Private company limited by shares | Dissolved |
| UNION HARVEST DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION FOREST LIMITED | Private company limited by shares | Dissolved |
| UNION (INTERNATIONAL) KNITTING FACTORY LIMITED | Private company limited by shares | Live |
| ASIATIC UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| MASS UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION PROFIT INVESTMENTS LIMITED | Private company limited by shares | Live |
| UNITED TEAMS LIMITED | Private company limited by shares | Dissolved |
| RJ UNIFOODS LIMITED | Private company limited by shares | Dissolved |
| UNICHEM CONSTRUCTION PRODUCTS LIMITED | Private company limited by shares | Dissolved |
| KING UNISON LIMITED | Private company limited by shares | Dissolved |
| MAIN UNION INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNION RISING DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION HOME DEVELOPMENT LIMITED | Private company limited by shares | Live |
| TSUEN WAN WAI CHOW MAIN UNION (SCHOOL) LIMITED | Company limited by guarantee | Dissolved |
| STRONG UNION INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNION COSMOS (H.K.) LIMITED | Private company limited by shares | Dissolved |
| LUCKY UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| LUCKY UNION INVESTMENT LIMITED | Private company limited by shares | Live |
| UNIBASE LIMITED | Private company limited by shares | Live |
| POC UNITED ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNION GATE DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION GATE KNITTING FACTORY LIMITED | Private company limited by shares | Live |
| UNION SCHEME INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| UNIS RESEARCH LIMITED | Private company limited by shares | Dissolved |
| UNISON FOREIGN EXCHANGE LIMITED | Private company limited by shares | Live |
| UNIQUE SENSE LIMITED | Private company limited by shares | Dissolved |
| UNION LINK INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION FORD INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNIONCHARM INDUSTRIES LIMITED | Private company limited by shares | Live |
| UNISTAG COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNIQUE SKY LIMITED | Private company limited by shares | Dissolved |
| UNIWELL ELECTRONIC LIMITED | Private company limited by shares | Live |
| JUST UNION LIMITED | Private company limited by shares | Live |
| CHARMING UNION INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| DOUBLE UNION PROMOTION LIMITED | Private company limited by shares | Dissolved |
| UNION JET INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNION PEARL DEVELOPMENT LIMITED | Private company limited by shares | Live |
| GREAT UNION FREIGHT SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| UNIHALE INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNIFIT INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| VIC UNITY COMPANY LIMITED | Private company limited by shares | Dissolved |