| POWER UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| STAR UNION INVESTMENTS (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| CHINA UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| MULTI UNION (HK) LIMITED | Private company limited by shares | Dissolved |
| UNION WAY FAR EAST LIMITED | Private company limited by shares | Dissolved |
| UNION SENSE HOLDINGS LIMITED | Private company limited by shares | Live |
| INTERNATIONAL ACCOUNTANCY STUDIES UNION LIMITED | Private company limited by shares | Dissolved |
| CMC UNION COMPANY LIMITED | Private company limited by shares | Live |
| UNION PEARL INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION FORD INTERNATIONAL LIMITED | Private company limited by shares | Live |
| SUN UNION ENTERPRISES LIMITED | Private company limited by shares | Live |
| UNION INTERNATIONAL ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| UNION LINK TECHNOLOGY LIMITED | Private company limited by shares | Live |
| UNION BAY LIMITED | Private company limited by shares | Dissolved |
| EAST UNION INVESTMENTS LIMITED | Private company limited by shares | Live |
| UNION STAR TECHNOLOGY LIMITED | Private company limited by shares | Live |
| UNION STAR GIFTS & CRAFTS COMPANY LIMITED | Private company limited by shares | Live |
| GREAT UNION INT'L (HK) LIMITED | Private company limited by shares | Dissolved |
| UNION BRIGHT GARMENT LIMITED | Private company limited by shares | Dissolved |
| UNION TEXTILES WEAVING FACTORY LIMITED | Private company limited by shares | Live |
| UNION SUCCESS (HONG KONG) LIMITED | Private company limited by shares | Live |
| UNION CITY INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| CAPITAL UNION (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNION REGENT DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION SMART MANAGEMENT CONSULTANTS LIMITED | Private company limited by shares | Live |
| MAX UNION TRADING LIMITED | Private company limited by shares | Live |
| VIEW UNION LIMITED | Private company limited by shares | Dissolved |
| CHINA UNION LOGISTICS CO., LIMITED | Private company limited by shares | Dissolved |
| UNION FORTUNE TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION PLASTIC CO. LIMITED | Private company limited by shares | Dissolved |
| LUCK UNION LIMITED | Private company limited by shares | Dissolved |
| JOINT UNION CORPORATION LIMITED | Private company limited by shares | Live |
| UNION LINK INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| OCEAN UNION INTERNATIONAL TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION BRIGHTER LIMITED | Private company limited by shares | Live |
| UNION HOPE ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| UNION EASE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION WISE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION LUXE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION INTERNATIONAL GIFT CO., LIMITED | Private company limited by shares | Live |
| UNION SENIOR HEADING (H.K) HOLDING LIMITED | Private company limited by shares | Dissolved |
| OCEAN UNION HOLDINGS LIMITED | Private company limited by shares | Live |
| UNION WORLD HOLDINGS LIMITED | Private company limited by shares | Live |
| GOLDEN UNION EXCHANGE LIMITED | Private company limited by shares | Dissolved |
| CITY UNION INTERNATIONAL (HK) LIMITED | Private company limited by shares | Dissolved |
| JOINT UNION INVESTMENT LIMITED | Private company limited by shares | Live |
| KANDA UNION INTERNATIONAL HOLDING CO., LIMITED | Private company limited by shares | Dissolved |
| SOURCE UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| DRAGON UNION CORP. LIMITED | Private company limited by shares | Dissolved |
| UNION BASIC LIMITED | Private company limited by shares | Dissolved |
| UNION BASIC INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| UNION INTERNATIONAL LOGISTICS CO. LIMITED | Private company limited by shares | Dissolved |
| SUNNY UNION LIMITED | Private company limited by shares | Live |
| MEGA UNION MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| MEGA UNION INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| ASIA UNION HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| UNION VIEW ENTERPRISES LIMITED | Private company limited by shares | Live |
| EASTERN UNION LIMITED | Private company limited by shares | Dissolved |
| UNION SCORE LIMITED | Private company limited by shares | Live |
| UNION POWER ELECTRONICS & TECHNOLOGY LIMITED | Private company limited by shares | Live |
| UNION TRUTH (HONG KONG) LIMITED | Private company limited by shares | Live |
| WIN UNION CONSTRUCTION ENGINEERING LIMITED | Private company limited by shares | Live |
| UNION FORCE INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION MIND (HONG KONG) LIMITED | Private company limited by shares | Live |
| SKY UNION TECHNOLOGIES (HK) LIMITED | Private company limited by shares | Dissolved |
| OCEAN UNION LIMITED | Private company limited by shares | Live |
| UNIONLINK CORPORATION LIMITED | Private company limited by shares | Dissolved |
| BEST & BEST UNION (HONG KONG) LIMITED | Private company limited by shares | Live |
| UNION RICH LOGISTICS CO., LIMITED | Private company limited by shares | Live |
| 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 |
| K & L UNION INDUSTRY COMPANY LIMITED | Private company limited by shares | Live |
| TREASURE UNION INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| UNION STAR INTERNATIONAL ENTERPRISE LIMITED | Private company limited by shares | Live |
| MEGA UNION PROPERTIES LIMITED | Private company limited by shares | Dissolved |
| CHINESE UNION 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 |
| TALENT UNION 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 |
| WISE UNION LOGISTICS TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| EVER UNION ELECTRONIC (H.K.) LIMITED | Private company limited by shares | Live |
| UNION EXPRESS TRANSPORTATION LIMITED | Private company limited by shares | Dissolved |
| 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 |
| UNION PACIFIC HOLDINGS LIMITED | Private company limited by shares | Live |
| FAITH UNION 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 |
| UNION VICTOR LIMITED | Private company limited by shares | Live |
| TECH UNION LIMITED | Private company limited by shares | Dissolved |