| CROWN CASTLE LIMITED | Private company limited by shares | Live |
| CROWN CASTLE (HONG KONG) LIMITED | Private company limited by shares | Live |
| CYBER CASTLE LIMITED | Private company limited by shares | Dissolved |
| CYBER CASTLE LIMITED | Private company limited by shares | Live |
| DELUXE CASTLE LIMITED | Private company limited by shares | Live |
| J. CASTLE DESIGN LIMITED | Private company limited by shares | Live |
| Castle Design Limited | Private company limited by shares | Live |
| CASTLE DIAMOND HONG KONG LIMITED | | Live |
| DIAMOND CASTLE INVESTMENTS LIMITED | Private company limited by shares | Live |
| CASTLE DISTRIBUTION LIMITED | Private company limited by shares | Live |
| CASTLE DOUGLAS LIMITED | Private company limited by shares | Dissolved |
| DRAGON CASTLE COMPANY LIMITED | Private company limited by shares | Dissolved |
| DRAGON CASTLE LIMITED | Private company limited by shares | Live |
| DREAM CASTLE LIMITED | Private company limited by shares | Live |
| DREAM CASTLE LIMITED | Private company limited by shares | Live |
| DYNAMIC CASTLE INVESTMENTS LIMITED | Private company limited by shares | Live |
| CASTLE EASE LIMITED | Private company limited by shares | Live |
| EAST CASTLE LIMITED | Private company limited by shares | Dissolved |
| CASTLE EAST LIMITED | Private company limited by shares | Dissolved |
| EAST CASTLE LIMITED | Private company limited by shares | Live |
| EAST CASTLE ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| EAST CASTLE PROPERTIES LIMITED | Private company limited by shares | Live |
| EAST CASTLE TRADING LIMITED | Private company limited by shares | Dissolved |
| WEALTH CASTLE FAR EAST LIMITED | Private company limited by shares | Dissolved |
| EASTERN CASTLE LIMITED | Private company limited by shares | Dissolved |
| EASY CASTLE COMPANY LIMITED | Private company limited by shares | Live |
| CASTLE EDUCATION CONSULTANCY LIMITED | Private company limited by shares | Live |
| Castle Rock Education Limited | Private company limited by shares | Live |
| CASTLE ELECTRONICS LIMITED | Private company limited by shares | Dissolved |
| ELEPHANT AND CASTLE LIMITED | Private company limited by shares | Live |
| ELITE CASTLE LIMITED | Private company limited by shares | Dissolved |
| ELITE CASTLE LIMITED | Private company limited by shares | Live |
| Castle Elite Investments Limited | | Live |
| CASTLE OF HOSS AND EMPEROR LIMITED -THE- | Private company limited by shares | Live |
| CASTLE EMPIRE LIMITED | Private company limited by shares | Live |
| CASTLE ENERGY LIMITED | Private company limited by shares | Live |
| NEW CASTLE ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| CASTLE ENGINEERING LIMITED | Private company limited by shares | Live |
| SUN CASTLE ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| SKY CASTLE ENGINEERING LIMITED | Private company limited by shares | Live |
| ONE CASTLE ENGINEERING LIMITED | Private company limited by shares | Live |
| CASTLE BUSINESS ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| EASY CASTLE ENGINEERING LIMITED | Private company limited by shares | Live |
| GOLD CASTLE ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| GRAND CASTLE ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| RICH CASTLE ENGINEERING LIMITED | | Live |
| CASTLE WIN ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| RED CASTLE ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| NEW CASTLE ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| WIN CASTLE ENTERPRISES LIMITED | Private company limited by shares | Live |
| CASTLE ENTERPRISES LIMITED | Private company limited by shares | Live |
| BIG CASTLE ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| SKY CASTLE ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| NEW CASTLE ENTERPRISES LIMITED | Private company limited by shares | Live |
| DRAGON CASTLE ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| DRAGON CASTLE ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| GRAND CASTLE ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| NICE CASTLE ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| CASTLE ESTATES & INVESTMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| ETERNAL CASTLE LIMITED | Private company limited by shares | Dissolved |
| ETERNAL CASTLE ENTERPRISE LIMITED | Private company limited by shares | Live |
| EVER CASTLE LIMITED | Private company limited by shares | Live |
| EVER CASTLE ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| EVER CASTLE ENTERPRISE LIMITED | Private company limited by shares | Live |
| EVER CASTLE INVESTMENT LIMITED | Private company limited by shares | Live |
| EXCEL CASTLE LIMITED | Private company limited by shares | Live |
| CASTLE EXPRESS LIMITED | Private company limited by shares | Live |
| EXPRESS CASTLE LIMITED | Private company limited by shares | Live |
| CASTLE EXPRESS LIMITED | Private company limited by shares | Live |
| CASTLE FAIR LIMITED | Private company limited by shares | Dissolved |
| FAIR CASTLE LIMITED | Private company limited by shares | Live |
| FAIR CASTLE ENTERPRISES LIMITED | Private company limited by shares | Live Commenced dormancy on 15-Dec-2017 |
| Fairlane Castle Limited | Private company limited by shares | Live |
| CASTLE FAME LIMITED | Private company limited by shares | Dissolved |
| FAME CASTLE LIMITED | Private company limited by shares | Dissolved |
| FAME CASTLE LIMITED | Private company limited by shares | Live |
| FAME CASTLE LIMITED | | Live |
| FAME CASTLE INVESTMENTS LIMITED | Private company limited by shares | Live |
| FANCY CASTLE LIMITED | Private company limited by shares | Live |
| SEA CASTLE FASHION LIMITED | Private company limited by shares | Live |
| CASTLE FASHION CO., LIMITED | Private company limited by shares | Dissolved |
| FAST CASTLE LIMITED | Private company limited by shares | Live |
| CASTLE FINANCE INC LIMITED | Private company limited by shares | Live |
| FINE CASTLE LIMITED | Private company limited by shares | Live |
| CASTLE FINE LIMITED | Private company limited by shares | Live |
| FLOURISH CASTLE LIMITED | Private company limited by shares | Dissolved |
| FLOWERS CASTLE LIMITED | | Live |
| FORCE CASTLE LIMITED | Private company limited by shares | Live Ceased dormancy on 09-Jan-2018 |
| FORD CASTLE LIMITED | Private company limited by shares | Dissolved |
| CASTLE FORT LIMITED | Private company limited by shares | Live |
| FORTRESS CASTLE LIMITED | Private company limited by shares | Live |
| FORTUNE CASTLE LIMITED | Private company limited by shares | Dissolved |
| FORTUNE CASTLE (ASIA) LIMITED | Private company limited by shares | Dissolved |
| FORTUNE CASTLE (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| FORTUNE CASTLE INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| FORTUNE CASTLE INVESTMENTS LIMITED | Private company limited by shares | Live |
| CASTLE FRANCO LIMITED | Private company limited by shares | Dissolved |
| CASTLE FRASER LIMITED | Private company limited by shares | Live |
| FRUIT CASTLE COMPANY LIMITED | Private company limited by shares | Dissolved |
| FRUIT CASTLE LIMITED | Private company limited by shares | Live |