| UNION CONTACT LIMITED | Private company limited by shares | Dissolved |
| UNION ENTERPRISE INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNION COURSE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| FULL UNION LIMITED | Private company limited by shares | Dissolved |
| UNITY INVESTMENT LIMITED | Private company limited by shares | Live |
| TECH UNIVERSAL ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNITED FLY LIMITED | Private company limited by shares | Dissolved |
| UNION INTERNATIONAL TRANSPORTATION CO. LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL METAL WORKS LIMITED | Private company limited by shares | Dissolved |
| UNIFIBER MANUFACTURING LIMITED | Private company limited by shares | Live |
| UNION LABEL PRINTING COMPANY LIMITED -THE- | Private company limited by shares | Live |
| SOUTH UNION LIMITED | Private company limited by shares | Live |
| NEW UNION TRANSPORTATION LIMITED | Private company limited by shares | Dissolved |
| WELL UNITED SUPPLY LIMITED | Private company limited by shares | Dissolved |
| WELL UNION ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| KEY UNION COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL PRODUCER LIMITED | Private company limited by shares | Dissolved |
| WELL UNITED SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| NEW UNIVERSE LIMITED | Private company limited by shares | Dissolved |
| UNION PACIFIC CONSULTANTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNIC TRADING (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| TEEM UNITY LIMITED | Private company limited by shares | Dissolved |
| GRAND UNITED INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| SOUTH UNITED LIMITED | Private company limited by shares | Dissolved |
| CHINA UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| CHINA UNION TRADING LIMITED | Private company limited by shares | Dissolved |
| SILVER UNION TRADING LIMITED | Private company limited by shares | Dissolved |
| HUGE UNION COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNI-WEALTH COMPANY LIMITED | Private company limited by shares | Dissolved |
| V. UNION CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| UNION GAS & ENGINEERING CORPORATION LIMITED -THE- | Private company limited by shares | Live |
| UNION GAS APPLIANCES (CHINA) LIMITED -THE- | Private company limited by shares | Live |
| UNION COMPUTER LABEL FACTORY LIMITED | Private company limited by shares | Live |
| UNISON INVESTMENT LIMITED | Private company limited by shares | Live |
| GOOD UNION LIMITED | Private company limited by shares | Live |
| JET UNIVERSE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNITECH CONSTRUCTION LIMITED | Private company limited by shares | Dissolved |
| UNITED HARVEST ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNITED VENTURE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNITED HARVEST INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNITED WEALTH PROPERTIES LIMITED | Private company limited by shares | Live |
| UNION BRIGHT INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNITRACT DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| JET UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| BEST UNION LIMITED | Private company limited by shares | Live |
| UNEMAC (H.K.) CO., LIMITED | Private company limited by shares | Dissolved |
| EVER UNION INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Unified Software Limited | Private company limited by shares | Live |
| UNISON RESEARCH AND DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| LONG UNITY LIMITED | Private company limited by shares | Dissolved |
| WELL UNITED INVESTMENTS LIMITED | Private company limited by shares | Live |
| ALLIED UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| ALLIED UNION LIMITED | Private company limited by shares | Live |
| ALLIED UNION INVESTMENT LIMITED | Private company limited by shares | Live |
| ALLIED UNION INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNIVERSE PLASTIC MANUFACTORY LIMITED | Private company limited by shares | Live |
| PACIFIC UNION ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNISON SILK COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNIFAST TRANSPORTATION CO LIMITED | Private company limited by shares | Live |
| MIGHT UNITED LIMITED | Private company limited by shares | Dissolved |
| UNION SIGNAL LIMITED | Private company limited by shares | Dissolved |
| NICE UNITED LIMITED | Private company limited by shares | Dissolved |
| HIN UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| CHAT UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| MAT UNION INVESTMENT LIMITED | Private company limited by shares | Live |
| CHIEF UNION INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| KEEN UNION INVESTMENT LIMITED | Private company limited by shares | Live |
| CHIEF UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| OVERSEAS UNION INTERNATIONAL TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNISUN COMPANY LIMITED | Private company limited by shares | Dissolved |
| VANDA UNION INDUSTRIAL (H.K.) COMPANY LIMITED | Private company limited by shares | Dissolved |
| ORIENTAL UNIVERSE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| LIFE UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNIPRO ASIA LIMITED | Private company limited by shares | Dissolved |
| UNITED INTERNET PRODUCTS LIMITED | Private company limited by shares | Dissolved |
| HAPPY UNITED INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| FORTUNE UNION COMPANY LIMITED | Private company limited by shares | Live |
| FIRST UNITED INVESTMENTS LIMITED | Private company limited by shares | Live |
| UNITED CAUSE LIMITED | Private company limited by shares | Dissolved |
| UNION GOLD LIMITED | Private company limited by shares | Dissolved |
| UNI-WITS INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNION BRIGHT ELECTRONIC LIMITED | Private company limited by shares | Dissolved |
| UNITED GAIN LIMITED | Private company limited by shares | Live |
| UNIVERSAL SILVER PLATED METAL FACTORY LIMITED | Private company limited by shares | Dissolved |
| GOOD UNION MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| OVERSEAS UNION (CHINA) LIMITED | Private company limited by shares | Dissolved |
| GOLDEN UNION INDUSTRIES LIMITED | Private company limited by shares | Live |
| SUN UNION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| UNITECH COMPUTER SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| HILL UNITED LIMITED | Private company limited by shares | Dissolved |
| UNION TIME INDUSTRIES LIMITED | Private company limited by shares | Live Commenced dormancy on 30-Mar-2006 |
| WORLD UNION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| SUPER UNION ENTERPRISES LIMITED | Private company limited by shares | Live |
| YIU WAH (UNITED) ENTERPRISES COMPANY LIMITED | Private company limited by shares | Dissolved |
| SUPER UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION DAY LIMITED | Private company limited by shares | Dissolved |
| MARVEL UNION LIMITED | Private company limited by shares | Dissolved |
| OVERSEAS UNION TELECOMMUNICATION COMPANY LIMITED | Private company limited by shares | Live |
| GRAND UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| FULL UNION ENTERPRISES CO. LIMITED | Private company limited by shares | Dissolved |