| UNION JOY LIMITED | Private company limited by shares | Live |
| UNION FORD INVESTMENTS LIMITED | Private company limited by shares | Live |
| UNION TIME INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNI-CHANNEL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| JOY UNITED INVESTMENTS LIMITED | Private company limited by shares | Live |
| POWER UNIVERSE TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| UNISONIC LIMITED | Private company limited by shares | Dissolved |
| UNITED FIRST PACIFIC CREDIT SERVICE (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNITRI LIMITED | Private company limited by shares | Dissolved |
| UNITED TRUMP TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION LINK INVESTMENTS LIMITED | Private company limited by shares | Live |
| UNIVERSAL INVESTMENTS LIMITED | Private company limited by shares | Live |
| UNION TECHNOLOGY (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNION GAIN INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| SKY UNION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| CN UNION (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNION INTERNATIONAL (CHINA) CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| UNION PLANNING COMPANY LIMITED | Private company limited by shares | Live |
| UNIPLUX LIMITED | Private company limited by shares | Live |
| SKY UNION INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| SURPLUS UNITED LIMITED | Private company limited by shares | Live |
| UNION GARMENT LIMITED | Private company limited by shares | Dissolved |
| HK UNION TRADING LIMITED | Private company limited by shares | Live |
| STRONG UNION INTERNATIONAL (HK) LIMITED | Private company limited by shares | Dissolved |
| UNITED GROUP LIMITED | Private company limited by shares | Dissolved |
| UNION TEAM INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNITY DCT LIMITED | Private company limited by shares | Dissolved |
| HANSAM UNION ENTERPRISES ACOUSTICS INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| CARE UNION LIMITED | Private company limited by shares | Dissolved |
| SKY UNION ASIA LIMITED | Private company limited by shares | Dissolved |
| EXCEL UNION (CHINA) LIMITED | Private company limited by shares | Live |
| UNION GROWTH LIMITED | Private company limited by shares | Dissolved |
| UNION SOUND LIMITED | Private company limited by shares | Live |
| UNITED SOLUTIONS & TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| UNICARE TECHNOLOGY (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNION DEVELOPER COMPANY LIMITED | Private company limited by shares | Live |
| AUSTO UNIVERSAL LIMITED | Private company limited by shares | Live |
| GRAND UNION (HK) INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNION CARBON GROUP (HK) CO. LIMITED | Private company limited by shares | Dissolved |
| UNITED SYSTEM LIMITED | Private company limited by shares | Dissolved |
| CAPITAL UNIVERSAL LIMITED | Private company limited by shares | Dissolved |
| CHINA UNION INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| MAX UNITED LIMITED | Private company limited by shares | Live |
| UNITED CYBERWORKS LIMITED | Private company limited by shares | Dissolved |
| L & L UNION CO., LIMITED | Private company limited by shares | Dissolved |
| UNION CONTINENTAL HONG KONG LIMITED | Private company limited by shares | Live |
| UNICAM INTERNATIONAL CORPORATION LIMITED | Private company limited by shares | Dissolved |
| CHAMP UNION INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| CHAMP UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION TRADE MATERIALS SUPPLIES LIMITED | Private company limited by shares | Dissolved |
| UNITED MICROWAVE LIMITED | Private company limited by shares | Live |
| CHINA UNION INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNICORP INDUSTRIAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION FRIENDS IMPORT AND EXPORT COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION GROW LIMITED | Private company limited by shares | Live |
| TOP UNION INTERNATIONAL ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| ACHIEVE UNITED LIMITED | Private company limited by shares | Dissolved |
| GLOBAL UNION ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNI-PLASTIC COMPANY LIMITED | Private company limited by shares | Live |
| JOIN UNION LIMITED | Private company limited by shares | Live |
| UNION TEXTILE OF CHINA (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNION REGENT INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNIVERSAL SINDA MULTIMEDIA COMPANY LIMITED | Private company limited by shares | Dissolved |
| BEST UNION INTERNATIONAL INVESTMENT CO., LIMITED | Private company limited by shares | Dissolved |
| UNITY PRECISION ELECTRICAL LIMITED | Private company limited by shares | Dissolved |
| UNITED PACIFIC SHIPPING LIMITED | Private company limited by shares | Live |
| USA UNION AUTO PARTS GROUP COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION STAR INDUSTRIES LIMITED | Private company limited by shares | Live |
| UNIQUE SPORTS AGENCY LIMITED | Private company limited by shares | Dissolved |
| UNION SHEEN INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNI-SKY (CHINA) LIMITED | Private company limited by shares | Dissolved |
| UNI-FINE INVESTMENT LIMITED | Private company limited by shares | Live |
| UNITRANS INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| ITALY UNIVERSE APPLIANCES (INT'L) GROUP LIMITED | Private company limited by shares | Dissolved |
| UNION BEST ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| WIN UNION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| UNITED GAIN INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION BRIDGE CHINA LIMITED | Private company limited by shares | Live |
| UNION (H.K.) CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| UNITED MIND LIMITED | Private company limited by shares | Live |
| UNITED MILLION INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| JOIN UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| FORTUNE UNION TRADING LIMITED | Private company limited by shares | Dissolved |
| UNISOLUTION LIMITED | Private company limited by shares | Dissolved |
| UNITED ENTERPRISES (GROUP) LIMITED | Private company limited by shares | Dissolved |
| UNISTEEL LIMITED | Private company limited by shares | Dissolved |
| SUPER GOAL UNIVERSAL LIMITED | Private company limited by shares | Live |
| UNISON MANAGEMENT LIMITED | Private company limited by shares | Live |
| UNITECH TECHNOLOGY (HK) CO., LIMITED | Private company limited by shares | Dissolved |
| UNION FORCE (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| ORIENTAL UNION LIMITED | Private company limited by shares | Dissolved |
| UNION TEAM ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| GOLDEN UNION FAREAST LIMITED | Private company limited by shares | Dissolved |
| UNITED VICTORY INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNION CONSTRUCTION & ENGINEERING CO. LIMITED | Private company limited by shares | Live |
| UNITRON ELECTRONICS COMPANY LIMITED | Private company limited by shares | Live |
| UNITEX LIMITED | Private company limited by shares | Dissolved |
| UNION DEVELOPMENT INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION WEALTHY INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL ENERGY TRADING LIMITED | Private company limited by shares | Dissolved |