| SPLENDOUR UNIVERSAL LIMITED | Private company limited by shares | Dissolved |
| UNITED NATIONS EMERGENCY RESCUE ASIA CENTER LIMITED | Private company limited by shares | Live |
| UNICON INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNITECH Asia Technologies Pvt. Limited | Private company limited by shares | Live |
| UNITECH ENGINEERING (HONG KONG) LIMITED | Private company limited by shares | Live |
| HISEA UNION SHIPPING (HK) CO., LIMITED | Private company limited by shares | Dissolved |
| SPARK UNIVERSE CO., LIMITED | Private company limited by shares | Live |
| UNIVERSE TECHNOLOGIES CO., LIMITED | Private company limited by shares | Dissolved |
| UNITED AVENUE LIMITED | Private company limited by shares | Live |
| UNION ENGINEERING MACHINERY CO., LIMITED | Private company limited by shares | Live |
| UNIVERSAL FORTUNE LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL RICH GLOBAL LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL INDUSTRY LIMITED | Private company limited by shares | Dissolved |
| UNION FAMOUS DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNIS INTERNATIONAL (H.K.) CO., LIMITED | Private company limited by shares | Dissolved |
| UNIMC & COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION ACTION LIMITED | Private company limited by shares | Dissolved |
| UNION CATHAY UPM HOLDING LIMITED | Private company limited by shares | Dissolved |
| UNION JOY INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION BASE INVESTMENT (GROUP) LIMITED | Private company limited by shares | Dissolved |
| UNION HONOR INTERNATIONAL ENTERPRISE LIMITED | Private company limited by shares | Live |
| UNION PROJECT SERVICE COMPANY LIMITED | Private company limited by shares | Live |
| UNISTAR LIMITED | Private company limited by shares | Dissolved |
| ORIENTAL SINO UNION OE TEK LIMITED | Private company limited by shares | Dissolved |
| UNION DEVELOP LIMITED | Private company limited by shares | Dissolved |
| UNI-HARVEST LIMITED | Private company limited by shares | Dissolved |
| UNION FAITH INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| UNION SINO LIMITED | Private company limited by shares | Live |
| GOLD UNITED LIMITED | Private company limited by shares | Live |
| ORIENTAL UNITED LIMITED | Private company limited by shares | Dissolved |
| UNION LAND TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION PACIFIC TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION HONEST ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL ENLIGHTENMENT BUDDHIST ASSOCIATION | Company limited by guarantee | Live |
| UNION EXTENSION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNIVERSE TECHNOLOGY (HK) CORPORATION LIMITED | Private company limited by shares | Dissolved |
| UNION TECH LIMITED | Private company limited by shares | Dissolved |
| UNION INTERNATIONAL TRADING (HK) LIMITED | Private company limited by shares | Dissolved |
| Union Finance Investment Group Co., Limited | Private company limited by shares | Dissolved |
| UNIVERSAL BRIGHT ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNITECHEM INDUSTRIAL LIMITED | Private company limited by shares | Live |
| UNIVERSAL GEOMANTIC OMEN GROUP LIMITED | Private company limited by shares | Dissolved |
| UNION STATE (H.K.) LIMITED | Private company limited by shares | Live |
| UNIVERSAL FINANCE LIMITED | Private company limited by shares | Dissolved |
| UNION LINK TECHNOLOGY DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNIWELL HIGH-TECH LIMITED | Private company limited by shares | Dissolved |
| FOREVER UNION LIMITED | Private company limited by shares | Live |
| UNION ELECTRONICS TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL MOTOR MANUFACTURING LIMITED | Private company limited by shares | Live |
| UNITED WEALTH INVESTMENTS LIMITED | Private company limited by shares | Live |
| Union Warehouse Co., Limited | Private company limited by shares | Live |
| UNION LANDUSE PLANMASTERS (HK) LIMITED | Private company limited by shares | Dissolved |
| VIGOROUS UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| NEW ART UNION LIMITED | Private company limited by shares | Live |
| GOLDEN OCEAN UNION LIMITED | Private company limited by shares | Dissolved |
| RICH UNITED LIMITED | Private company limited by shares | Dissolved |
| WONDERFUL TIME UNION ENERGY LIMITED | Private company limited by shares | Dissolved |
| Unique Manufacturing Limited | Private company limited by shares | Live |
| UNION BEST DEVELOP LIMITED | Private company limited by shares | Dissolved |
| UNION MATE DEVELOP LIMITED | Private company limited by shares | Dissolved |
| UNITED DEVELOP LIMITED | Private company limited by shares | Dissolved |
| UNION ON DEVELOP LIMITED | Private company limited by shares | Dissolved |
| JOINT UNION DEVELOP LIMITED | Private company limited by shares | Dissolved |
| UNION CONCEPT GLOBAL LIMITED | Private company limited by shares | Dissolved |
| UNION GLOBAL WORLDWIDE LIMITED | Private company limited by shares | Live |
| ALL UNITY LIMITED | Private company limited by shares | Dissolved |
| UNI-RISE LIMITED | Private company limited by shares | Live |
| J & F UNION INVESTMENTS LIMITED | Private company limited by shares | Live |
| UNITED PETROLEUM HOLDING LIMITED | Private company limited by shares | Dissolved |
| ADVANCE UNION ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| Unisource International Limited | Private company limited by shares | Live |
| UNITED MORTGAGE LIMITED | Private company limited by shares | Dissolved |
| UNISON PROPERTY LIMITED | Private company limited by shares | Live |
| UNI-TECH PRODUCTIONS LIMITED | Private company limited by shares | Live |
| UNION ASIAN INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNICOLOR MOSAIC LIMITED | Private company limited by shares | Live |
| Uni-Well Metals Co., Limited | Private company limited by shares | Live |
| UNIQUE SPICE LIMITED | Private company limited by shares | Dissolved |
| Unitech Multimedia Limited | Private company limited by shares | Dissolved |
| UNION MATE INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNITY ONE LIMITED | Private company limited by shares | Live |
| UNITED HAPPY LIMITED | Private company limited by shares | Live |
| UNIVERSAL MEDICAL SOLUTIONS LIMITED | Private company limited by shares | Live |
| UNION STANLEY LIMITED | Private company limited by shares | Dissolved |
| UNITED FANCY FUR LIMITED | Private company limited by shares | Live |
| UNION TRADING GROUP CO., LIMITED | Private company limited by shares | Dissolved |
| Unitech Toys Corporation Limited | Private company limited by shares | Live |
| UNITEX LIMITED | Private company limited by shares | Live |
| TRIPLE WELL UNION LIMITED | Private company limited by shares | Dissolved |
| UNI-RIGHT LIMITED | Private company limited by shares | Dissolved |
| UNIWAY INDUSTRY COMPANY LIMITED | Private company limited by shares | Dissolved |
| GREAT UNION OIL INVESTMENTS LIMITED | Private company limited by shares | Live |
| GREAT UNION GROUP LIMITED | Private company limited by shares | Live |
| SHANGHAI UNITY ELECTRICAL LIMITED | Private company limited by shares | Live |
| UNION WORLD HONG KONG DEVELOPMENT LIMITED | Private company limited by shares | Live |
| PORTROAD UNIVERSAL LIMITED | Private company limited by shares | Live |
| UNIVERSAL SHIPPING (CHINA HK) LIMITED | Private company limited by shares | Live |
| CENTRAL UNION (ASIA) HOLDING LIMITED | Private company limited by shares | Live |
| UNITED GRACE ASIA LIMITED | Private company limited by shares | Dissolved |
| FIRST UNITED CAPITAL CO., LIMITED | Private company limited by shares | Live |