| UNION SQUARE CORPORATION LIMITED | Private company limited by shares | Dissolved |
| UNION OCEAN INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNION WATCH (H.K.) LIMITED | Private company limited by shares | Live |
| UNION PROPERTY (ASIA) HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNITED STRATEGY LIMITED | Private company limited by shares | Live |
| UNION FORTUNE TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| JET UNION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION (GLOBAL) LOGISTICS LIMITED | Private company limited by shares | Live |
| FORD UNION LIMITED | Private company limited by shares | Live |
| UNION WINNING LIMITED | Private company limited by shares | Dissolved |
| UNINEWS STRATEGIC INVESTMENT LIMITED | Private company limited by shares | Live |
| CROWN UNION ELECTRONICS LIMITED | Private company limited by shares | Dissolved |
| GOODKING JUNHUA INTERNATIONAL AUCTION UNITED GROUP LIMITED | Private company limited by shares | Dissolved |
| UNITED CERAMICS MANUFACTORY LIMITED | Private company limited by shares | Dissolved |
| PACIFIC UNICON LIMITED | Private company limited by shares | Dissolved |
| UNISOURCE LIMITED | Private company limited by shares | Dissolved |
| EVER UNION INTERNATIONAL TRADING LIMITED | Private company limited by shares | Dissolved |
| UNIVERSE INTELLECTUAL PROPERTY LIMITED | Private company limited by shares | Live |
| ART UNION ENVIRONMENTAL LIMITED | Private company limited by shares | Dissolved |
| UNION MEDIA ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNI-PLUS ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| UNITED BEST COMPANY LIMITED | Private company limited by shares | Live |
| HK UNIVERSE INT'L DRESS LIMITED | Private company limited by shares | Dissolved |
| SOUTH UNION BROTHERS COMPANY LIMITED | Private company limited by shares | Live |
| UNION FAITH TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| RICH UNION INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION LINK INTERNATIONAL MOVERS (HK) LIMITED | Private company limited by shares | Live |
| WINMARK - UNION CHANCE HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION POWER HK CPA LIMITED | Private company limited by shares | Live |
| TOP UNION INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNION FAIR HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNITED TECH ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| RADIO UNISON COMPANY LIMITED | Private company limited by shares | Live |
| UNION PROSPER INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNITED VISION LIMITED | Private company limited by shares | Dissolved |
| HK UNION INVESTMENTS LIMITED | Private company limited by shares | Live |
| UNION FIELD INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNION MASTER INTERNATIONAL LIMITED | Private company limited by shares | Live |
| SINO UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| USA UNION AUMEIA TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| UNION CREATIVE INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| UNION CASTINGS COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNITEDWOOD INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| GAINFUL UNIVERSAL FOODS LIMITED | Private company limited by shares | Live |
| CHINA TRADE UNION LIMITED | Private company limited by shares | Dissolved |
| UNIVERSE MUSIC LIMITED | Private company limited by shares | Live |
| UNIVISION LIMITED | Private company limited by shares | Dissolved |
| UNION TECHNOLOGY DEV., LIMITED | Private company limited by shares | Live |
| SHEEN UNIVERSAL LIMITED | Private company limited by shares | Dissolved |
| UNITED ASSET LIMITED | Private company limited by shares | Dissolved |
| UNION DRAGON LIMITED | Private company limited by shares | Dissolved |
| UNION SENSE LIMITED | Private company limited by shares | Dissolved |
| UNITED LUCK LIMITED | Private company limited by shares | Dissolved |
| TRI UNION INTERNATIONAL CO. LIMITED | Private company limited by shares | Dissolved |
| UNION ASSETS HOLDINGS LIMITED | Private company limited by shares | Live |
| UNION SECURITIES LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL RAYS LIMITED | Private company limited by shares | Live |
| BRIGHT START UNION COMMUNICATION LIMITED | Private company limited by shares | Live |
| UNION GEM LIMITED | Private company limited by shares | Dissolved |
| SUNNY UNITED LIMITED | Private company limited by shares | Live |
| UNI-WELL TRANSPORTATION LIMITED | Private company limited by shares | Live |
| EAST UNION CONSTRUCTION FIRM LIMITED | Private company limited by shares | Live |
| UNIWELL ELECTRONICS (INTERNATIONAL) CO., LIMITED | Private company limited by shares | Dissolved |
| CY UNIVERSAL TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| RICHLY (UNION) ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL MAGNETISM LIMITED | Private company limited by shares | Dissolved |
| SEA UNION TELECOM LIMITED | Private company limited by shares | Dissolved |
| UNION SUN INTERNATIONAL GROUP LIMITED | Private company limited by shares | Live |
| RIGHT UNION INVESTMENT LIMITED | Private company limited by shares | Live |
| HERO UNION LIMITED | Private company limited by shares | Dissolved |
| UNIC TECHNOLOGY (HK) LIMITED | Private company limited by shares | Live |
| ROOM UNION LIMITED | Private company limited by shares | Dissolved |
| UNION EAST (H.K.) LIMITED | Private company limited by shares | Live |
| UNITED STAR MANUFACTURING COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNITECH ELECTRONIC TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Dissolved |
| GARUDA UNION GROUP HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| ITALY UNION KANGAROO (H.K.) INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION BRIDGE INTERNATIONAL LIMITED | Private company limited by shares | Live |
| KONG SHUM UNION (CHINA) LIMITED | Private company limited by shares | Live |
| UNITED MANUFACTURING LIMITED | Private company limited by shares | Dissolved |
| UNION WISE APPLIED TECHNOLOGY HOLDING LIMITED | Private company limited by shares | Dissolved |
| FEI YEUNG UNION (HOLDINGS) LIMITED | Private company limited by shares | Live |
| UNI-WAY ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| CHINA UNION CHEMICAL INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL PIGEON LIMITED | Private company limited by shares | Dissolved |
| NAM SHUM (UNIVERSAL) COMPANY LIMITED | Private company limited by shares | Live |
| UNION GRAND CARGO (HK) COMPANY LIMITED | Private company limited by shares | Live |
| KENT UNION LIMITED | Private company limited by shares | Dissolved |
| KONG HO UNION ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| UNITED DISTRIBUTORS (ASIA) LIMITED | Private company limited by shares | Dissolved |
| UNIDRAGON COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNITED SKY ENTERPRISES LIMITED | Private company limited by shares | Live |
| UNION ENTERPRISE INTERNATIONAL LIMITED | Private company limited by shares | Live |
| WING TAI UNION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| ASIAN UNITED LIMITED | Private company limited by shares | Dissolved |
| RED UNIVERSE MACHINERY CO., LIMITED | Private company limited by shares | Dissolved |
| SAM UNIVERSE LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL ENTERPRISE GROUP LIMITED | Private company limited by shares | Live |
| UNION TOUGH ADVERTISEMENT LIMITED | Private company limited by shares | Live |
| AMERICA EURO UNION GROUP HONGKONG LIMITED | Private company limited by shares | Dissolved |