| 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 |
| LEADER CASTLE LIMITED | Private company limited by shares | Live |
| LEADER CASTLE INVESTMENTS LIMITED | Private company limited by shares | Live |
| CASTLE LEAP LIMITED | Private company limited by shares | Live |
| CASTLE LEGACY LIMITED | Private company limited by shares | Live |
| CASTLE LINK LIMITED | Private company limited by shares | Live |
| LINK CASTLE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| CASTLE LINKAGE LIMITED | Private company limited by shares | Live |
| CASTLE LION LIMITED | Private company limited by shares | Live |
| LONG CASTLE LIMITED | Private company limited by shares | Dissolved |
| LONG CASTLE LIMITED | Private company limited by shares | Live |
| LONG CASTLE ENTERPRISES LIMITED | Private company limited by shares | Live |
| CASTLE LOYAL LIMITED | Private company limited by shares | Live |
| CASTLE LOYAL LIMITED | Private company limited by shares | Live |
| CASTLE LUCK LIMITED | Private company limited by shares | Live |
| LUCKY CASTLE LIMITED | Private company limited by shares | Dissolved |
| LUCKY CASTLE LIMITED | Private company limited by shares | Live |
| LUCKY CASTLE LIMITED | Private company limited by shares | Live |
| LUCKY CASTLE INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| LUCKY CASTLE INVESTMENTS LIMITED | Private company limited by shares | Live |
| LUXURIANT CASTLE LIMITED | Private company limited by shares | Live |
| Magic Castle Limited | Private company limited by shares | Dissolved |
| MAGIC CASTLE LIMITED -THE- | Private company limited by shares | Live |
| MAGIC CASTLE INVESTMENTS LIMITED | Private company limited by shares | Live |
| MAIN CASTLE LIMITED | Private company limited by shares | Dissolved |
| Castle Management Limited | Private company limited by shares | Live |
| CASTLE 2800 MANAGEMENT LIMITED | Private company limited by shares | Live |
| Castle Concord Management Limited | Private company limited by shares | Dissolved |
| GOLD CASTLE MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| Oriental Castle Management Limited | Private company limited by shares | Live |
| Castle Peak Capital Management Limited | Private company limited by shares | Dissolved |
| Castle Manager Company Limited | Private company limited by shares | Live |
| CASTLE TECH MANUFACTUREING LIMITED | Private company limited by shares | Dissolved |
| CASTLE TECH MANUFACTUREING LIMITED | | Live |
| CASTLE MANUFACTURER LIMITED | Private company limited by shares | Dissolved |
| CASTLE MAPLE LIMITED | Private company limited by shares | Live |
| Marble Castle Limited | Private company limited by shares | Live |
| CASTLE MARBLE ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| MARCO CASTLE LIMITED | Private company limited by shares | Live |
| CASTLE MARK LIMITED | Private company limited by shares | Live |
| MASTER CASTLE LIMITED | Private company limited by shares | Dissolved |
| CASTLE MASTER LIMITED | Private company limited by shares | Live |
| MASTER CASTLE ASIA LIMITED | Private company limited by shares | Live |
| CASTLE MASTER ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| CASTLE PEAK METAL MATERIALS HK LIMITED | Private company limited by shares | Live |
| Castle Meadows Co Limited | | Live |
| MEGA CASTLE LIMITED | Private company limited by shares | Live |
| CASTLE MERIT LIMITED | Private company limited by shares | Dissolved |
| MERIT CASTLE LIMITED | Private company limited by shares | Live |
| METRO CASTLE LIMITED | Private company limited by shares | Live |
| MIGHTY CASTLE LIMITED | Private company limited by shares | Live |
| Mile Castle Enterprises Limited | Private company limited by shares | Live |
| MILLION CASTLE LIMITED | Private company limited by shares | Dissolved |
| MILLION CASTLE LIMITED | Private company limited by shares | Live |
| MINK CASTLE PROPERTIES LIMITED | Private company limited by shares | Live |
| MINT CASTLE HK LIMITED | Private company limited by shares | Live |
| MIRACLE CASTLE LIMITED | Private company limited by shares | Live |
| MODERN CASTLE LIMITED | Private company limited by shares | Dissolved |
| MODERN CASTLE LIMITED | Private company limited by shares | Live |
| MOON CASTLE LIMITED | Private company limited by shares | Live |
| MORAL CASTLE LIMITED | Private company limited by shares | Live |
| New Moral Castle Company Limited | Private company limited by shares | Live |
| MORE CASTLE LIMITED | Private company limited by shares | Live |
| GOLD CASTLE MOTORS LIMITED | Private company limited by shares | Dissolved |
| CASTLE PEAK MOTORS COMPANY LIMITED | Private company limited by shares | Dissolved |
| MOVING CASTLE COMPANY LIMITED | Private company limited by shares | Live |
| MUSIC CASTLE LIMITED | Private company limited by shares | Live |
| NATURAL CASTLE LIMITED | Private company limited by shares | Live |
| NETWORK CASTLE COMPANY LIMITED | Private company limited by shares | Dissolved |
| NEWRICH CASTLE LIMITED | Private company limited by shares | Dissolved |
| NICE CASTLE LIMITED | Private company limited by shares | Live |
| CASTLE NICE LIMITED | Private company limited by shares | Live |
| CASTLE OASIS LIMITED | Private company limited by shares | Live |
| OCEAN CASTLE LIMITED | Private company limited by shares | Dissolved |
| OCEAN CASTLE LIMITED | Private company limited by shares | Dissolved |