| DUCA COMPANY LIMITED | Private company limited by shares | Live |
| Dal Duca Limited | Private company limited by shares | Live |
| Dal Duca Limited | Private company limited by shares | Live |
| DUCALE LIMITED | Private company limited by shares | Dissolved |
| H.K. DU-CAN FOOD & BEVERAGE CHAIN-LIKE GROUP LIMITED | Private company limited by shares | Live |
| DUCAPITAL HOLDING COMPANY LIMITED | Private company limited by shares | Live |
| DUCAT COMPANY LIMITED | Private company limited by shares | Dissolved |
| Ducat Limited | Private company limited by shares | Live |
| DUCATI AGENCY LIMITED | Private company limited by shares | Dissolved |
| DUCATI ALLIANCE LIMITED | | Live |
| DUCATI (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| DUCATO HQ Limited | Private company limited by shares | Live |
| DUCATO HK Limited | | Live |
| Ducatong Limited | Private company limited by shares | Dissolved |
| DUCATS TRADING LIMITED | Private company limited by shares | Dissolved |
| DUCCAN ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| ITALY DUCCIO ELECTRO ACOUSTIC CO., LIMITED | Private company limited by shares | Live |
| Ducens Limited | | Live |
| DUC&GUL GROUP LIMITED | Private company limited by shares | Live |
| DUCHALEY CONSULTANCY COMPANY LIMITED | Private company limited by shares | Live |
| DUCHAMP LIMITED | Private company limited by shares | Dissolved |
| HK Ducheng Limited | | Live |
| DUCHENG.HK LIMITED | | Live |
| DUCHESS LIMITED | | Live |
| Duchess Capital Limited | | Live |
| DUCHESS CONSULTANT COMPANY LIMITED | Private company limited by shares | Live |
| DUCHESS OF HONG KONG LIMITED | Private company limited by shares | Dissolved |
| HONGKONG DRUID DUCHESS GROUP LIMITED | Private company limited by shares | Live |
| Duchesse Anne Consulting Limited | Private company limited by shares | Live |
| DUCHOY INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| DUCHY HEADWEAR MANUFACTORY LIMITED | Private company limited by shares | Live |
| DUCHY HEADWEAR MANUFACTORY LIMITED | | Live |
| ROYAL GRAND DUCHY INVESTMENT GROUP LIMITED | Private company limited by shares | Dissolved |
| DUCIE TRADING LIMITED | Private company limited by shares | Dissolved |
| ECO DUCK LIMITED | Private company limited by shares | Live |
| Duck Limited | Private company limited by shares | Live |
| Dog and Duck Limited -The- | Private company limited by shares | Live |
| So So Duck Company Limited | Private company limited by shares | Live |
| Tao Duc Duck Limited | | Live |
| Duck La Limited | | Live |
| Kam Do Duck Limited | | Live |
| LILING CITY XIANDU SPICY DUCK LIMITED | Private company limited by shares | Live |
| Koda Duck Games Company Limited | | Live |
| HK Happy Duck Network Limited | Private company limited by shares | Live |
| Space Duck Limited | Private company limited by shares | Live |
| YALEME SPICY DUCK (CHANGSHA) LIMITED | Private company limited by shares | Live |
| DUCKBILL COMPANY LIMITED | Private company limited by shares | Live |
| Duckburg Ctt Limited | | Live |
| DUCKCROWN INVESTMENTS LIMITED | Private company limited by shares | Live |
| Duckduck Limited | Private company limited by shares | Live |
| GERMANY DUCKER AWES POWER TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| Ducker Edmiston Hong Kong Limited | Private company limited by shares | Live |
| Ducker Storage Limited | Private company limited by shares | Live |
| Ducketts Limited | | Live |
| Duckham Enterprises Limited | Private company limited by shares | Dissolved |
| DUCKIE ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| DUCKIE LEARNING CENTRE LIMITED | | Live |
| Ducking Trading Company Limited | Private company limited by shares | Live |
| DUCKLINGTON LIMITED | Private company limited by shares | Dissolved |
| DUCKLINGTON SHIPPING COMPANY LIMITED | Private company limited by shares | Dissolved |
| DucklinHK Limited | Private company limited by shares | Live |
| DUCKLY PROPERTY LIMITED | Private company limited by shares | Dissolved |
| DUCKNEY COMPANY LIMITED | Private company limited by shares | Dissolved |
| DUCKNOK COMPANY LIMITED | Private company limited by shares | Dissolved |
| DUCKON ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| Old Ducks Limited | | Live |
| DUCKSENIC COMPANY LIMITED | Private company limited by shares | Live |
| Duckweed Limited | Private company limited by shares | Live |
| DUCKWORTH HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| DUCKWORTH INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Duckworth Publishing Limited | Private company limited by shares | Live |
| DUCKY CO. LIMITED | Private company limited by shares | Dissolved |
| Ducky B Limited | Private company limited by shares | Dissolved |
| DUCKZILLA LIMITED | Private company limited by shares | Dissolved |
| DUCLAIR LIMITED | Private company limited by shares | Dissolved |
| Duco Properties Limited | Private company limited by shares | Live |
| DUCO TECHNOLOGY LIMITED | Private company limited by shares | Live |
| HK Ducson Limited | Private company limited by shares | Live |
| Sun Lee Air Duct Limited | Private company limited by shares | Live |
| ON KONG ALUMINIUM DUCT CO. LIMITED | Private company limited by shares | Live |
| DURA DUCT (CHINA) LIMITED | Private company limited by shares | Dissolved |
| XIAMEN UNT DUCT MATERIAL CO., LIMITED | Private company limited by shares | Live |
| WIN POWER DUCT ENGINEERING LIMITED | Private company limited by shares | Live |
| INTERLOCK FLEXIBLE DUCT (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| SUN LEE AIR DUCT (HK) LIMITED | | Live |
| SKYLANE PACIFIC AIR DUCT (H.K.) LIMITED | Private company limited by shares | Dissolved |
| Hong Kong ABB Bus Duct Co., Limited | Private company limited by shares | Live |
| DURA DUCT HONG KONG LIMITED | Private company limited by shares | Dissolved |
| HONG KONG SPIRAL DUCT LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI HUATE DUCT INDUSTRY GROUP LIMITED | Private company limited by shares | Dissolved |
| DUCT IMPORT & EXPORT CO., LIMITED | Private company limited by shares | Dissolved |
| HK PIERSA DUCT INDUSTRY GROUP LIMITED | Private company limited by shares | Live |
| SHANGHAI PIERSA DUCT INDUSTRY GROUP LIMITED | Private company limited by shares | Live |
| SHANGHAI PIERSA DUCT INDUSTRY GROUP LIMITED | | Live |
| HK TIANDE DUCT INDUSTRY LIMITED | Private company limited by shares | Dissolved |
| DURA DUCT INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| PLATO AIR DUCT CLEANING LIMITED | Private company limited by shares | Live |
| FO SHAN NAN HAI FORTIS DUCT LIMITED | Private company limited by shares | Live |
| PACIFIC WING SHING AIR DUCT COMPANY LIMITED | Private company limited by shares | Live |
| DELTA DUCT SYSTEMS LIMITED | Private company limited by shares | Live |