| PERMANENT UNION LIMITED | Private company limited by shares | Dissolved |
| PARRY UNION ENGINEERING AND CONSTRUCTION COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION TAXI & P.L.B. LIMITED | Private company limited by shares | Live |
| THAMES UNION (FAR EAST) LIMITED | Private company limited by shares | Dissolved |
| UNION PHOTO SUPPLIES LIMITED | Private company limited by shares | Dissolved |
| PLAN UNION LIMITED | Private company limited by shares | Dissolved |
| UNION LEATHER WARE HANDBAGS COMPANY LIMITED | Private company limited by shares | Dissolved |
| WELL HONG (UNION) CONSTRUCTION COMPANY LIMITED | Private company limited by shares | Dissolved |
| REPUBLIC UNION OF BURMA TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION SQUARE INDUSTRIAL AND COMMERCIAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION MOULDING LIMITED | Private company limited by shares | Dissolved |
| UNION SILK EXPORT COMPANY LIMITED | Private company limited by shares | Dissolved |
| BROAD UNION COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION HYDROCARBON COMPANY LIMITED | Private company limited by shares | Dissolved |
| Brand Union Limited -The- | Private company limited by shares | Live |
| SELF UNION LIMITED | Private company limited by shares | Dissolved |
| BEIJING UNION (H.K.) LIMITED | Private company limited by shares | Dissolved |
| WISE UNION COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION TERMINALS LIMITED | Private company limited by shares | Dissolved |
| WELL UNION COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION TOWER INVESTMENT EXIM LIMITED | Private company limited by shares | Dissolved |
| UNION ELECTRIC (H.K.) COMPANY LIMITED | Private company limited by shares | Dissolved |
| SUPER UNION COMPANY LIMITED | Private company limited by shares | Dissolved |
| AMERIN UNION LIMITED | Private company limited by shares | Dissolved |
| UNION FAITH INVESTMENT MANAGEMENT LIMITED | Private company limited by shares | Live |
| UNION GAS APPLIANCES TRADING LIMITED -THE- | Private company limited by shares | Live |
| UNION FUNDS COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION FORCE COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION SYSTEM COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION CLASP JEWELLERY MANUFACTURER LIMITED | Private company limited by shares | Live |
| UNION POWER LIMITED | Private company limited by shares | Dissolved |
| UNION BRAVE LIMITED | Private company limited by shares | Live |
| OCEAN UNION INSURANCE AGENTS LIMITED | Private company limited by shares | Dissolved |
| PACIFIC UNION ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| PARK UNION ENTERPRISE COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION LANDING COMPANY, LIMITED | Private company limited by shares | Live |
| UNION PAGING COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION GIFTWARE (HONG KONG) LIMITED | Private company limited by shares | Live |
| HONS UNION JEWELLERY CO. (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNION RAISING LIMITED | Private company limited by shares | Live |
| UNION KAI YIP SUPERMARKET COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION INDUSTRIAL SUPPLIES LIMITED | Private company limited by shares | Dissolved |
| WIDE UNION COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION STAR SERVICES COMPANY LIMITED | Private company limited by shares | Dissolved |
| SOUTH UNION TRADING LIMITED | Private company limited by shares | Dissolved |
| UNION MOTION COMPANY LIMITED | Private company limited by shares | Live |
| UNION BRIGHT LIMITED | Private company limited by shares | Live |
| UNION P C B LIMITED | Private company limited by shares | Dissolved |
| UNION GLORY LIMITED | Private company limited by shares | Live Commenced dormancy on 30-Aug-2016 |
| UNION TRIDANT CO. LIMITED | Private company limited by shares | Dissolved |
| G & W UNION DEVELOPMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION BRIGHT DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| JEIPAL UNION LIMITED | Private company limited by shares | Dissolved |
| KAM UNION COMPANY LIMITED | Private company limited by shares | Dissolved |
| SKY UNION LIMITED | Private company limited by shares | Dissolved |
| UNION HARDWARE MATERIAL SUPPLY LIMITED | Private company limited by shares | Dissolved |
| UNION PRECISION METAL WORKS LIMITED | Private company limited by shares | Dissolved |
| HEAD UNION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| HEROIC UNION LIMITED | Private company limited by shares | Dissolved |
| JN UNION LIMITED | Private company limited by shares | Dissolved |
| MORE UNION COMPANY LIMITED | Private company limited by shares | Live |
| UNION HERO LIMITED | Private company limited by shares | Live |
| UNION FORTUNE LIMITED | Private company limited by shares | Dissolved |
| UNION BASE LIMITED | Private company limited by shares | Dissolved |
| UNION BUTTON FACTORY LIMITED | Private company limited by shares | Live |
| UNION VIEW LIMITED | Private company limited by shares | Live |
| UNION TREASURE FILM LIMITED | Private company limited by shares | Dissolved |
| SELECTIVE TRADEMARK UNION LIMITED | Private company limited by shares | Live |
| UNION HARVEST COMPANY LIMITED | Private company limited by shares | Live |
| EARN UNION COMPANY LIMITED | Private company limited by shares | Dissolved |
| E & M (UNION) SUPPLY CENTRE LIMITED | Private company limited by shares | Dissolved |
| HONS UNION PROPERTIES LIMITED | Private company limited by shares | Live |
| UNION CHASE (HK) COMPANY LIMITED | Private company limited by shares | Live |
| OPEN UNION LIMITED | Private company limited by shares | Dissolved |
| UNION BAY SPORTWEAR (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNIONTOWN LIMITED | Private company limited by shares | Dissolved |
| JADE UNION COMPANY LIMITED | Private company limited by shares | Dissolved |
| CROWN UNION COMPANY LIMITED | Private company limited by shares | Dissolved |
| ASIA UNION SURVEY SERVICES LIMITED | Private company limited by shares | Live |
| CHINA UNION INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| KONG SHUM UNION PROPERTY MANAGEMENT COMPANY LIMITED | Private company limited by shares | Live |
| UNION STRONG LIMITED | Private company limited by shares | Live |
| UNION MARKET COMPANY LIMITED | Private company limited by shares | Dissolved |
| YORSTON UNION COMPANY LIMITED | Private company limited by shares | Dissolved |
| CHARTER UNION COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION SCIENTIFIC LIMITED | Private company limited by shares | Dissolved |
| ORIENTAL UNION AIRCARGO LIMITED | Private company limited by shares | Live |
| SOUTHGOOD UNION LIMITED | Private company limited by shares | Dissolved |
| AIR & SEA UNION HOLDING LIMITED | Private company limited by shares | Live Ceased dormancy on 21-Aug-2002 |
| UNIONWEST MACHINERY LIMITED | Private company limited by shares | Live |
| REASONIC UNION LIMITED | Private company limited by shares | Live |
| JOIN UNION LIMITED | Private company limited by shares | Dissolved |
| UNION TYPESETTING COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION PROSPEROUS PLASTIC MANUFACTORY LIMITED | Private company limited by shares | Dissolved |
| WIN UNION COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION WEALTHY COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION TROPICAL FISH FARM LIMITED | Private company limited by shares | Live |
| UNION OCEAN ENGINEERING SERVICES COMPANY LIMITED | Private company limited by shares | Dissolved |
| ART UNION COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNION TREASURE DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |