| HONG KONG GOLDEN UNION LIMITED | Private company limited by shares | Live |
| UNION POWERMAGNETS CO., LIMITED | Private company limited by shares | Live |
| UNITED CREST LIMITED | Private company limited by shares | Live |
| OCEAN UNIVERSE LIMITED | Private company limited by shares | Live |
| GOLD UNION INTERNATIONAL INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| ACE UNION INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| WORLD UNION INDUSTRIES LIMITED | Private company limited by shares | Live |
| TECH UNION LIMITED | Private company limited by shares | Live |
| UNIVERSAL ASIA GROUP LIMITED | Private company limited by shares | Dissolved |
| INTERNATIONAL BUSINESS UNION CO., LIMITED | Private company limited by shares | Live |
| CHINESE CHRISTIAN ASSEMBLIES OF GOD UNION LIMITED | Company limited by guarantee | Live |
| UNION VISION INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION FANCY LIMITED | Private company limited by shares | Live |
| UNITED FOUNTAIN INVESTMENT LIMITED | Private company limited by shares | Live |
| UNITED VISION ENTERPRISES LIMITED | Private company limited by shares | Live |
| NEW UNION INTERNATIONAL INDUSTRIAL LIMITED | Private company limited by shares | Live |
| UNIQUELINK ENTERPRISES CO., LIMITED | Private company limited by shares | Live |
| UNIVERSAL EXPORTS (ASIA) LIMITED | Private company limited by shares | Live |
| UNI-GROUP HK CO., LIMITED | Private company limited by shares | Dissolved |
| JET UNITED (ASIA) LIMITED | Private company limited by shares | Dissolved |
| UNION INTERNATIONAL PROPERTIES LIMITED | Private company limited by shares | Live |
| ACCESSORIZE UNLIMITED LIMITED | Private company limited by shares | Dissolved |
| UNION EAST ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNION EAST INVESTMENT LIMITED | Private company limited by shares | Live |
| Union Fishing Thai-Sing Limited | Private company limited by shares | Live Commenced dormancy on 14-Sep-2015 |
| UNION FORCE LIMITED | Private company limited by shares | Live |
| UNION OF GREEN PURCHASING CO., LIMITED -THE- | Private company limited by shares | Dissolved |
| UNION PROFIT CORPORATION LIMITED | Private company limited by shares | Live |
| UNION RICHWAY LIMITED | Private company limited by shares | Live |
| UNION MAXWELL LIMITED | Private company limited by shares | Live |
| UNION SUPER STAR LIMITED | Private company limited by shares | Live |
| CHART UNION LIMITED | Private company limited by shares | Live |
| Unita Group Holding Inc. Limited | Private company limited by shares | Live |
| HONGKONG SEANA UNION CO., LIMITED | Private company limited by shares | Dissolved |
| UNEED LIMITED | Private company limited by shares | Dissolved |
| UNOVOL TRADING CO., LIMITED | Private company limited by shares | Dissolved |
| GRAND GOLDEN UNION LIMITED | Private company limited by shares | Dissolved |
| UNION GLORY (HK) INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION TARGET (CHINA) LIMITED | Private company limited by shares | Live |
| NEW UNITY LIMITED | Private company limited by shares | Live |
| Union Trade (Shanghai) Limited | Private company limited by shares | Dissolved |
| WISE UNITED LIMITED | Private company limited by shares | Live |
| CON & WIN UNION CORPORATION LIMITED | Private company limited by shares | Dissolved |
| CENTRAL UNION DECO CO. LIMITED | Private company limited by shares | Dissolved |
| Universal System Limited | Private company limited by shares | Dissolved |
| Mingfai Union Limited | Private company limited by shares | Live |
| UNILUMIN GROUP LIMITED | Private company limited by shares | Dissolved |
| UPPER UNION LIMITED | Private company limited by shares | Dissolved |
| AMERICAN WEST UNION INT'L HK LIMITED | Private company limited by shares | Dissolved |
| UNITED GENE LIMITED | Private company limited by shares | Live |
| WELL UNION (CHINA) LIMITED | Private company limited by shares | Live |
| UNION ROCK (HK) LIMITED | Private company limited by shares | Live |
| HONGKONG UNION INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| MEGA UNION FAR EAST LIMITED | Private company limited by shares | Dissolved |
| MIGHTY UNION ONLINE LLC CO., LIMITED | Private company limited by shares | Dissolved |
| EURO ASIA UNION INTERNATIONAL TRADING COMPANY LIMITED | Private company limited by shares | Live |
| UNIVERSAL TIMEPIECE LIMITED | Private company limited by shares | Live |
| UNION POINT.JO LIMITED | Private company limited by shares | Dissolved |
| MASS UNION TECHNOLOGY DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNION ASIAN DEVELOPMENT LIMITED | Private company limited by shares | Live |
| CHINA UNITED ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNION RISE INTERNATIONAL DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION FOCUS ENTERPRISES LIMITED | Private company limited by shares | Live |
| UNION KINGDOM INTERNATIONAL LIMITED | Private company limited by shares | Live |
| SKY UNIVERSE GROUP INDUSTRY LIMITED | Private company limited by shares | Live |
| DISCOVER UNDERWEAR IMPORT&EXPORT CO., LIMITED | Private company limited by shares | Live |
| UNIVERSE ASIA GROUP LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL ELECTRONICS TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| UNIEQUITY TECHNOLOGY LIMITED | Private company limited by shares | Live |
| UNIVERSAL MINING INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION SIGHT LIMITED | Private company limited by shares | Live |
| CRYSTAL UNION LIMITED | Private company limited by shares | Dissolved |
| UNION RICHEST (HONG KONG) LIMITED | Private company limited by shares | Live |
| ASIA UNION TOBACCO LIMITED | Private company limited by shares | Live |
| GREAT UNION (H.K.) LIMITED | Private company limited by shares | Dissolved |
| Uni-touch Optronics Co., Limited | Private company limited by shares | Live |
| CHINA UNION ENTERPRISE LIMITED | Private company limited by shares | Live |
| GREAT UNION MINING INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNLOCK STRATEGY LIMITED | Private company limited by shares | Dissolved |
| WELL UNION INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION HERO (HK) LIMITED | Private company limited by shares | Live |
| UNISUCCESS INTERNATIONAL LIMITED | Private company limited by shares | Live |
| CHINA UNION INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Live |
| HIGHTECH UNIVERS LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL SHIP MANAGEMENT COMPANY LIMITED | Private company limited by shares | Live |
| UNITED GROUP CO LIMITED | Private company limited by shares | Live |
| POWER UNION INVESTMENTS LIMITED | Private company limited by shares | Live |
| UNION PROSPEROUS INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Union Power Mortars Company Limited | Private company limited by shares | Live |
| Unifame International Trade Co., Limited | Private company limited by shares | Dissolved |
| HONG KONG UNION FORTUNE LIMITED | Private company limited by shares | Live |
| UNLIPOT GLOBAL LIMITED | Private company limited by shares | Live Commenced dormancy on 09-May-2011 |
| UNION LASHING CO., LIMITED | Private company limited by shares | Live |
| EUROPEAN UNION INTERNATIONAL TRADING INVESTMENT (HOLDINGS) LIMITED | Private company limited by shares | Dissolved |
| UNITED CHARM LIMITED | Private company limited by shares | Live |
| GOLD STATURE UNDERWEAR GLOBAL CHAIN GROUP (HK) LIMITED | Private company limited by shares | Dissolved |
| HONGKONG UNISON CULTURE CO., LIMITED | Private company limited by shares | Live |
| RICH UNITED LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL (D.P.) PROPERTY AGENCY LIMITED | Private company limited by shares | Live |
| RISE UNION ENTERPRISES LIMITED | Private company limited by shares | Live |