| CKSA FAMILY LIMITED | Private company limited by shares | Dissolved |
| CKSC HONG KONG ALUMNI ASSOCIATION LIMITED | Company limited by guarantee | Live |
| CKSC & PARTNERS LIMITED | Private company limited by shares | Dissolved |
| C.K.S.H. INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| HONG KONG CKSIN TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| CKSKY Trading HK Company Limited | Private company limited by shares | Live |
| CKSS TRAVEL LIMITED | Private company limited by shares | Live |
| Cksy Limited | Private company limited by shares | Live |
| CKSYSTEM LIMITED | Private company limited by shares | Live |