| HONOR CASTLE LIMITED | Private company limited by shares | Dissolved |
| Hosting Castle Limited | Private company limited by shares | Live |
| Hotel COZi (Castle Peak Road) Limited | Private company limited by shares | Live |
| Gold Castle Hotel Limited | Private company limited by shares | Live |
| CASTLE PEAK HOTEL COMPANY, LIMITED | Private company limited by shares | Dissolved |
| HUGH CASTLE INVESTMENTS LIMITED | Private company limited by shares | Live |
| CASTLE INDUSTRIAL HK LIMITED | Private company limited by shares | Live |
| CASTLE INDUSTRIAL LIMITED | | Live |
| SEA CASTLE INDUSTRIAL (CHINA) LIMITED | Private company limited by shares | Live |
| GOLD CASTLE (CHINA) INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| CROWN CASTLE INDUSTRIAL LIMITED | Private company limited by shares | Live |
| GOLD CASTLE INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| GRAND CASTLE INDUSTRIAL LIMITED | Private company limited by shares | Live |
| POWER CASTLE INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| RICH CASTLE INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| RICH CASTLE INDUSTRIAL LIMITED | Private company limited by shares | Live |
| Intelligent Castle Enterprises Limited | Private company limited by shares | Live |
| NEW CASTLE INVESTMENT COMPANY LIMITED -THE- | Private company limited by shares | Dissolved |
| DAY CASTLE INVESTMENT LIMITED | Private company limited by shares | Live |
| CASTLE ROY INVESTMENT LIMITED | Private company limited by shares | Live |
| CASTLE ONE INVESTMENT LIMITED | Private company limited by shares | Live |
| TOP CASTLE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| CASTLE SUN INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| TOP CASTLE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| JOY CASTLE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| JOY CASTLE INVESTMENT LIMITED | Private company limited by shares | Live |
| IP CASTLE INVESTMENT LIMITED | Private company limited by shares | Live |
| BIG CASTLE INVESTMENT LIMITED | Private company limited by shares | Live |
| CASTLE INVESTMENT LIMITED | Private company limited by shares | Live |
| CASTLE WAY INVESTMENT LIMITED | Private company limited by shares | Live |
| ASIA CASTLE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| ASIA CASTLE INVESTMENT LIMITED | Private company limited by shares | Live |
| BEST CASTLE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| BIRCH CASTLE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| CASTLE CAPITAL INVESTMENT LIMITED | Private company limited by shares | Live |
| DRAGON CASTLE INVESTMENT LIMITED | Private company limited by shares | Live |
| FANCY CASTLE INVESTMENT LIMITED | Private company limited by shares | Live |
| GLORY CASTLE INVESTMENT LIMITED | Private company limited by shares | Live |
| GOLD CASTLE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| GOLD CASTLE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| GOLD CASTLE CAPITAL INVESTMENT LIMITED | Private company limited by shares | Live |
| GRAND CASTLE INVESTMENT LIMITED | Private company limited by shares | Live |
| HAPPY CASTLE INVESTMENT LIMITED | Private company limited by shares | Live |
| HARBOUR CASTLE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| LUCK CASTLE INVESTMENT LIMITED | Private company limited by shares | Live |
| MEGA CASTLE INVESTMENT LIMITED | Private company limited by shares | Live |
| NICE CASTLE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| NICE CASTLE INVESTMENT LIMITED | Private company limited by shares | Live |
| NICE CASTLE INVESTMENT LIMITED | Private company limited by shares | Live |
| OCEAN CASTLE INVESTMENT LIMITED | Private company limited by shares | Live |
| PACIFIC CASTLE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| PLENTY CASTLE INVESTMENT LIMITED | Private company limited by shares | Live |
| RICH CASTLE INVESTMENT LIMITED | Private company limited by shares | Live |
| SMART CASTLE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SMART CASTLE INVESTMENT LIMITED | Private company limited by shares | Live |
| TRIUMPH CASTLE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| WILDCAT CASTLE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| CASTLE INVESTMENTS LIMITED | Private company limited by shares | Live |
| NEW CASTLE INVESTMENTS LIMITED | Private company limited by shares | Live |
| SEA CASTLE INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| TOP CASTLE INVESTMENTS LIMITED | Private company limited by shares | Live |
| SKY CASTLE INVESTMENTS LIMITED | Private company limited by shares | Live |
| CHARMING CASTLE INVESTMENTS LIMITED | Private company limited by shares | Live |
| DYNASTY CASTLE INVESTMENTS LIMITED | Private company limited by shares | Live |
| EASY CASTLE INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| GOLD CASTLE INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| KENT CASTLE INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| LONG CASTLE INVESTMENTS LIMITED | Private company limited by shares | Live |
| OCEAN CASTLE INVESTMENTS LIMITED | Private company limited by shares | Live |
| POWER CASTLE INVESTMENTS LIMITED | Private company limited by shares | Live |
| RICH CASTLE INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| RICH CASTLE INVESTMENTS LIMITED | Private company limited by shares | Live |
| SPACE CASTLE INVESTMENTS LIMITED | Private company limited by shares | Live |
| ZURICH CASTLE INVESTMENTS LIMITED | Private company limited by shares | Live |
| ITALIAN CASTLE LIMITED | Private company limited by shares | Live |
| CASTLE JEWELLERY LIMITED | Private company limited by shares | Live |
| JOIN CASTLE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| JOYCE CASTLE LIMITED | Private company limited by shares | Live |
| JOYFUL CASTLE LIMITED | Private company limited by shares | Live |
| KIDDIZ CASTLE COMPANY LIMITED -THE- | Private company limited by shares | Dissolved |
| Kids Castle Limited | Private company limited by shares | Live |
| Fun Kids Castle Co., Limited | Private company limited by shares | Live |
| KONG CASTLE LIMITED | Private company limited by shares | Live |
| DAZZLING CASTLE (HONG KONG) LIMITED | Private company limited by shares | Live |
| Castle Luck Hong Kong Limited | Private company limited by shares | Live |
| NATURE'S CASTLE (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| SLIVER CASTLE (HONG KONG) LIMITED | | Live |
| EZE CASTLE INTEGRATION (HONG KONG) LIMITED | Private company limited by shares | Live |
| Castle Investment (Hong Kong) Co. Limited | Private company limited by shares | Dissolved |
| LUCKY CASTLE (HONG KONG) LIMITED | Private company limited by shares | Live |
| SILVER CASTLE (HONG KONG) LIMITED | Private company limited by shares | Live |
| KYLIN CASTLE LIMITED | Private company limited by shares | Dissolved |
| CASTLE LAKE LIMITED | Private company limited by shares | Live |
| CASTLE LAND LIMITED | Private company limited by shares | Live |
| CASTLE LAND LIMITED | Private company limited by shares | Live |
| LAND CASTLE LIMITED | Private company limited by shares | Live |
| Laundry Castle Limited | | Live |
| LEADER CASTLE LIMITED | Private company limited by shares | Live |
| CASTLE LEADER LIMITED | Private company limited by shares | Live |
| LEADER CASTLE LIMITED | Private company limited by shares | Live |