| RICH UNION ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNION RICH INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNION WORLD INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION FINEVIEW INDUSTRIAL LIMITED | Private company limited by shares | Live |
| UNI-FLEX (ASIA) LIMITED | Private company limited by shares | Live |
| K & L UNION INDUSTRY COMPANY LIMITED | Private company limited by shares | Live |
| TREASURE UNION INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNICOTECH COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION STAR INTERNATIONAL ENTERPRISE LIMITED | Private company limited by shares | Live |
| UNITED LINKER LIMITED | Private company limited by shares | Live |
| MEGA UNION PROPERTIES LIMITED | Private company limited by shares | Dissolved |
| UNI-WELLBORN COMPANY LIMITED | Private company limited by shares | Dissolved |
| CHINESE UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNISON DIGITAL LIMITED | Private company limited by shares | Dissolved |
| EVER UNIQUE LIMITED | Private company limited by shares | Live |
| UNICHAMPION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION SMART INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION KINGDOM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION BOARD TRADING LIMITED | Private company limited by shares | Dissolved |
| UNIFRONT ASIA LIMITED | Private company limited by shares | Dissolved |
| UNDERGROUND SOLUTIONS INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| TALENT UNION LIMITED | Private company limited by shares | Live |
| UNI-GLOBAL PACIFIC LIMITED | Private company limited by shares | Live |
| UNION WIN INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION SKY INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION TOP TRADING LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL PETROLEUM COMPANY LIMITED | Private company limited by shares | Dissolved |
| WISE UNION LOGISTICS TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| EVER UNION ELECTRONIC (H.K.) LIMITED | Private company limited by shares | Live |
| UNIFLYING INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| UNION EXPRESS TRANSPORTATION LIMITED | Private company limited by shares | Dissolved |
| WINNING UNITY LIMITED | Private company limited by shares | Dissolved |
| UNISURGICAL LIMITED | Private company limited by shares | Live |
| UNION ACE LIMITED | Private company limited by shares | Dissolved |
| UNION TOWN LIMITED | Private company limited by shares | Dissolved |
| UNION EMPIRE LIMITED | Private company limited by shares | Dissolved |
| UNION POWER LOGISTICS LIMITED | Private company limited by shares | Dissolved |
| UNION CRICKET ASSOCIATION LIMITED | Company limited by guarantee | Live |
| UNITGEM LIMITED | Private company limited by shares | Dissolved |
| WELL UNIQUE ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNION PACIFIC HOLDINGS LIMITED | Private company limited by shares | Live |
| UNITEC APPLIANCES LIMITED | Private company limited by shares | Dissolved |
| UNIQUE ACE LIMITED | Private company limited by shares | Live |
| FAITH UNION PROPERTIES LIMITED | Private company limited by shares | Dissolved |
| UNIVERSE PROPERTIES LIMITED | Private company limited by shares | Dissolved |
| MULTI UNION PROPERTIES LIMITED | Private company limited by shares | Live |
| TECH UNION INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNI-WEALTH TRADING (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNION VICTOR LIMITED | Private company limited by shares | Live |
| UNIVERSAL PRODUCTS LIMITED | Private company limited by shares | Dissolved |
| TECH UNION LIMITED | Private company limited by shares | Dissolved |
| ENGLISH UNLIMITED, LIMITED | Private company limited by shares | Dissolved |
| UNITRON INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNICAL INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| JOINT UNION INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| GREAT UNISON LIMITED | Private company limited by shares | Live |
| UNI-ELECTRONICS (HONG KONG) LIMITED | Private company limited by shares | Live |
| UNION GLOBAL INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION GLOBAL TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL TRADER INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION POWER TRADING LIMITED | Private company limited by shares | Live |
| CROWN UNION INDUSTRIAL LIMITED | Private company limited by shares | Live |
| HONG KONG UNION GROUP LIMITED | Private company limited by shares | Dissolved |
| UNION GLOBAL INVESTMENT LIMITED | Private company limited by shares | Live |
| WINNING UNITY PRINTING LIMITED | Private company limited by shares | Dissolved |
| UNIQUE HARVEST LIMITED | Private company limited by shares | Live |
| UNLIMITED ADVERTISING LIMITED | Private company limited by shares | Live |
| UNION (CONSTRUCTION) ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| CHRISTIAN CHINESE BOOK (UNITED) DISTRIBUTORS CO., LIMITED | Private company limited by shares | Live |
| UNION GLOBE TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION OVERSEAS LIMITED | Private company limited by shares | Live |
| TIME UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| STATE UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| UNICESS LIMITED | Private company limited by shares | Dissolved |
| GOLDEN UNION INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UniServity Limited | Private company limited by shares | Dissolved |
| ALLIED UNIVERSAL LIMITED | Private company limited by shares | Dissolved |
| UNION MILLION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION HONOR LIMITED | Private company limited by shares | Live |
| ROYAL UNION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| UNION TIME ENTERPRISES LIMITED | Private company limited by shares | Live |
| HK UNIVERSEA LIMITED | Private company limited by shares | Dissolved |
| WEALTHY UNIVERSAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNISUN LIMITED | Private company limited by shares | Dissolved |
| INTERNATIONAL UNION FAR EAST LIMITED | Private company limited by shares | Live |
| NANJING UNIVERSITY CAPITAL MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| SMART UNITED INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION RISE CORPORATION LIMITED | Private company limited by shares | Dissolved |
| UNION RISE ENTERPRISES LIMITED | Private company limited by shares | Live |
| UNION RISE HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION CONTROL COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNI-TECH INTERNATIONAL TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION SOURCE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNITED SHOES ASIA LIMITED | Private company limited by shares | Dissolved |
| GRAND UNION INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNIONFORTUNE ELECTRONIC CO., LIMITED | Private company limited by shares | Live |
| NEW UNION INTERNATIONAL PROPERTIES LIMITED | Private company limited by shares | Live |
| UNIVERSAL ASIA PRODUCTION LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL PENTECOSTAL CHURCH LIMITED | Company limited by guarantee | Live |
| VISION UNIVERSAL LIMITED | Private company limited by shares | Live |