| UNIFIED CHOICE COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL HIGHER EDUCATIONAL INSTITUTIONS LIMITED | Private company limited by shares | Dissolved |
| FIRST UNION (WATCH) COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION TALENT INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| GREAT UNION LINNA (FAR EAST) LIMITED -THE- | Private company limited by shares | Dissolved |
| HUGH UNITY INDUSTRIAL LIMITED | Private company limited by shares | Live |
| UNIQUE CLIFF INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNI-VICTORY INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNION GRADE LIMITED | Private company limited by shares | Live |
| UNION SHINE INDUSTRIAL LIMITED | Private company limited by shares | Live |
| UNION CRYSTAL INDUSTRIAL LIMITED | Private company limited by shares | Live |
| SUN'S UNION WATCH MANUFACTURER LIMITED | Private company limited by shares | Live |
| SET UNION INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| SET UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION FAITH SUPPLIES LIMITED | Private company limited by shares | Live |
| UNION CHEER COMPUTER LIMITED | Private company limited by shares | Dissolved |
| UNION GOOD TRADING LIMITED | Private company limited by shares | Dissolved |
| UNITREND TRADING LIMITED | Private company limited by shares | Dissolved |
| U P I UNITED PACIFIC INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNIONTELE INVESTMENTS LIMITED | Private company limited by shares | Live |
| UNIONAM TRADING LIMITED | Private company limited by shares | Dissolved |
| AQUILA UNIVERSAL DEVELOPMENTS CO., LIMITED | Private company limited by shares | Live |
| HUGH UNION INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| HUGH UNION INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNISON DIAZO SUPPLIES COMPANY LIMITED | Private company limited by shares | Live |
| HUGH UNION (INTERNATIONAL) LIMITED | Private company limited by shares | Dissolved |
| UNICON INTERNATIONAL (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNION TAILOR LIMITED | Private company limited by shares | Live |
| UNION PERFECT INVESTMENT LIMITED | Private company limited by shares | Live |
| UNITSKY INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION WORD LIMITED | Private company limited by shares | Dissolved |
| UNION CROWD LIMITED | Private company limited by shares | Dissolved |
| UNION CROWD INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNION GLORY INSURANCE (AGENTS) LIMITED | Private company limited by shares | Dissolved |
| UNIGRACE ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| Uniea Limited | Private company limited by shares | Live |
| UNION PHONE HOLDING LIMITED | Private company limited by shares | Dissolved |
| UNIQUE FASHION JEWELLERY LIMITED | Private company limited by shares | Live |
| UNION DITTY COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION PROSPER COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION CONNECTION LIMITED | Private company limited by shares | Dissolved |
| UNION REGENT COMPANY LIMITED | Private company limited by shares | Live |
| UNION KENETIC LIMITED | Private company limited by shares | Dissolved |
| UNION LEO COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL HOPE INVESTMENTS LIMITED | Private company limited by shares | Live |
| GRASS UNION LIMITED | Private company limited by shares | Dissolved |
| GOLD UNION RESOURCES LIMITED | Private company limited by shares | Dissolved |
| UNITED CHANNEL COMPANY LIMITED | Private company limited by shares | Dissolved |
| GOLD UNION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| GREAT UNION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| GREAT UNION CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| UNIKI LIMITED | Private company limited by shares | Dissolved |
| RICH UNION ELECTRONIC LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Rugby Union | Company limited by guarantee | Live |
| RICH UNION CARGO LIMITED | Private company limited by shares | Live |
| RICH UNION ENGINEERING LIMITED | Private company limited by shares | Live |
| UNION CODE INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNIHIGH LIMITED | Private company limited by shares | Live |
| UNIHORSE LIMITED | Private company limited by shares | Dissolved |
| UNICO COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNITED TECH INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNIHONOUR LIMITED | Private company limited by shares | Dissolved |
| GREAT UNION CARGO LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL ESTHETIC PRODUCTS LIMITED | Private company limited by shares | Dissolved |
| UNISS COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION GREENS COMPANY, LIMITED | Private company limited by shares | Dissolved |
| UNICONCEPT INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| JIANGSU UNISON SILK COMPANY, LIMITED | Private company limited by shares | Dissolved |
| UNIXPRESS COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNITEFACT INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNIONSTIN LIMITED | Private company limited by shares | Dissolved |
| UNIONSRICH LIMITED | Private company limited by shares | Dissolved |
| UNITED SUCCESS MANUFACTURER LIMITED | Private company limited by shares | Live |
| UNION FAITH FASHION GARMENTS LIMITED | Private company limited by shares | Dissolved |
| UNIGLOBE CONSULTANTS LIMITED | Private company limited by shares | Live |
| UNICON INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL CHART LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL BOAT LIMITED | Private company limited by shares | Dissolved |
| UNISON RIDGE LIMITED | Private company limited by shares | Live |
| UNION SIX DYEING WORKS LIMITED | Private company limited by shares | Dissolved |
| UNION RICH PLASTIC FACTORY LIMITED | Private company limited by shares | Live |
| TAI UNION INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| UNITED ART COMPUTER EMBROIDERY FACTORY LIMITED | Private company limited by shares | Dissolved |
| JETCROSS UNIVERSAL LIMITED | Private company limited by shares | Dissolved |
| UNION POWER PLASTIC LIMITED | Private company limited by shares | Live |
| SMART UNIVERSE TECHNOLOGY (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| PACIFIC UNIDATA LIMITED | Private company limited by shares | Dissolved |
| EAST CHINA UNIVERSITY OF CHEMICAL TECHNOLOGY ALUMNI ASSOCIATION LIMITED | Company limited by guarantee | Dissolved |
| UNION SPARK LIMITED | Private company limited by shares | Dissolved |
| UNION GLORY DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION PITH INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| PAN UNION INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| SOUTH UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| CROWN UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION VAST LIMITED | Private company limited by shares | Dissolved |
| UPM UNIQUE PRODUCTS MANUFACTURING LIMITED | Private company limited by shares | Live |
| UNISCIENCE LIMITED | Private company limited by shares | Dissolved |
| INCOME UNION LIMITED | Private company limited by shares | Dissolved |
| UNIONLINK SERVICES LIMITED | Private company limited by shares | Dissolved |
| UNIONEWS CONSULTANTS LIMITED | Private company limited by shares | Dissolved |