| UNION CRYSTAL INDUSTRIAL LIMITED | Private company limited by shares | Live |
| SUN'S UNION WATCH MANUFACTURER LIMITED | Private company limited by shares | Live |
| SET UNION INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| SET UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION FAITH SUPPLIES LIMITED | Private company limited by shares | Live |
| UNION CHEER COMPUTER LIMITED | Private company limited by shares | Dissolved |
| UNION GOOD TRADING LIMITED | Private company limited by shares | Dissolved |
| UNIONTELE INVESTMENTS LIMITED | Private company limited by shares | Live |
| UNIONAM TRADING LIMITED | Private company limited by shares | Dissolved |
| HUGH UNION INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| HUGH UNION INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| HUGH UNION (INTERNATIONAL) LIMITED | Private company limited by shares | Dissolved |
| UNION TAILOR LIMITED | Private company limited by shares | Live |
| UNION PERFECT INVESTMENT LIMITED | Private company limited by shares | Live |
| UNION WORD LIMITED | Private company limited by shares | Dissolved |
| UNION CROWD LIMITED | Private company limited by shares | Dissolved |
| UNION CROWD INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNION GLORY INSURANCE (AGENTS) LIMITED | Private company limited by shares | Dissolved |
| UNION PHONE HOLDING LIMITED | Private company limited by shares | Dissolved |
| UNION DITTY COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION PROSPER COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION CONNECTION LIMITED | Private company limited by shares | Dissolved |
| UNION REGENT COMPANY LIMITED | Private company limited by shares | Live |
| UNION KENETIC LIMITED | Private company limited by shares | Dissolved |
| UNION LEO COMPANY LIMITED | Private company limited by shares | Dissolved |
| GRASS UNION LIMITED | Private company limited by shares | Dissolved |
| GOLD UNION RESOURCES LIMITED | Private company limited by shares | Dissolved |
| GOLD UNION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| GREAT UNION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| GREAT UNION CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| RICH UNION ELECTRONIC LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Rugby Union | Company limited by guarantee | Live |
| RICH UNION CARGO LIMITED | Private company limited by shares | Live |
| RICH UNION ENGINEERING LIMITED | Private company limited by shares | Live |
| UNION CODE INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| GREAT UNION CARGO LIMITED | Private company limited by shares | Dissolved |
| UNION GREENS COMPANY, LIMITED | Private company limited by shares | Dissolved |
| UNIONSTIN LIMITED | Private company limited by shares | Dissolved |
| UNIONSRICH LIMITED | Private company limited by shares | Dissolved |
| UNION FAITH FASHION GARMENTS LIMITED | Private company limited by shares | Dissolved |
| UNION SIX DYEING WORKS LIMITED | Private company limited by shares | Dissolved |
| UNION RICH PLASTIC FACTORY LIMITED | Private company limited by shares | Live |
| TAI UNION INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| UNION POWER PLASTIC LIMITED | Private company limited by shares | Live |
| UNION SPARK LIMITED | Private company limited by shares | Dissolved |
| UNION GLORY DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION PITH INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| PAN UNION INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| SOUTH UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| CROWN UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION VAST LIMITED | Private company limited by shares | Dissolved |
| INCOME UNION LIMITED | Private company limited by shares | Dissolved |
| UNIONLINK SERVICES LIMITED | Private company limited by shares | Dissolved |
| UNIONEWS CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| UNION FINE MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| UNION OCEAN CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| MILLION UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION CAN INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| KAISER UNION INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| YON UNION DEVELOPMENT LIMITED | Private company limited by shares | Live |
| YON UNION LIMITED | Private company limited by shares | Dissolved |
| UNION SOURCE DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION POND DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION DEVELOPMENT INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| GET NICE (UNION) FINANCE COMPANY LIMITED | Private company limited by shares | Live |
| GEE UNION LIMITED | Private company limited by shares | Dissolved |
| SUN UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| CHINA UNION PROPERTY LIMITED | Private company limited by shares | Dissolved |
| UNION FAIR CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| FORE UNION INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| DENSE UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| DON UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION FARE LIMITED | Private company limited by shares | Dissolved |
| UNION KAMBO TOYS MFG CO., LIMITED | Private company limited by shares | Dissolved |
| MAIN UNION INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| UNION ONE DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION HEALTH INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| WELL UNION CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| UNIQUE UNION INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| UNION HING WAI BUTTONS, LIMITED | Private company limited by shares | Dissolved |
| UNION WAVE DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| HOLLY UNION LIMITED | Private company limited by shares | Dissolved |
| CROWN UNION CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| COMMERCIAL UNION LIMITED | Private company limited by shares | Live |
| UNION POOL LIMITED | Private company limited by shares | Dissolved |
| UNION POOL DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| CHEER UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION FINANCIAL ADVISORS LIMITED | Private company limited by shares | Live |
| HAPPY UNION LIMITED | Private company limited by shares | Live |
| UNION ZIPPER MANUFACTORY LIMITED | Private company limited by shares | Dissolved |
| BLOOM UNION LIMITED | Private company limited by shares | Dissolved |
| SOON UNION PRODUCTION LIMITED | Private company limited by shares | Dissolved |
| VAST UNION DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| UNION CROWN SERVICES LIMITED | Private company limited by shares | Dissolved |
| UNION FORCE TRANSPORTATION LIMITED | Private company limited by shares | Dissolved |
| UNION WAY TRANSPORTATION LIMITED | Private company limited by shares | Dissolved |
| UNION BRIGHT TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| UNION TOWN TRANSPORTATION LIMITED | Private company limited by shares | Dissolved |
| UNION WAY TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| UNION RICH TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |