| C.I.E. Limited | Private company limited by shares | Live |
| C.I.E Company Limited | Private company limited by shares | Live |
| CIEAURA GREATER CHINA LIMITED | Private company limited by shares | Live |
| CIEC CO., LIMITED | Private company limited by shares | Dissolved |
| CIEC LUCENCY CO., LIMITED | Private company limited by shares | Live |
| CIEC China Industry Engineering Consultant Limited | Private company limited by shares | Dissolved |
| CIEC EXHIBITION COMPANY (H.K.) LIMITED | Private company limited by shares | Live |
| CIEC (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| CIEC INTERNATIONAL EXHIBITION CO., LIMITED | Private company limited by shares | Live |
| CIEC INTERNATIONAL (HONG KONG) LIMITED | Private company limited by shares | Live |
| CIEC PUBLIC RELATIONS LIMITED | Private company limited by shares | Dissolved |
| Ciecoo International Co., Limited | Private company limited by shares | Live |
| CIEC-PACIFIC LIMITED | Private company limited by shares | Dissolved |
| CIEL BLU LIMITED | Private company limited by shares | Live |
| CIEL LIMITED | Private company limited by shares | Live |
| L'art en Ciel Limited | Private company limited by shares | Live |
| CIELITO LIMITED | Private company limited by shares | Dissolved |
| CIELMAX INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| Cielo Blu Limited | Private company limited by shares | Live |
| El Cielo Limited | Private company limited by shares | Live |
| MI CIELO COMPANY LIMITED | | Live |
| CIELO AZZURRO LIMITED | Private company limited by shares | Live |
| CIELO CO., LIMITED | Private company limited by shares | Live |
| CIELO DEVELOPMENTS LIMITED | Private company limited by shares | Dissolved |
| Cielo Digital Limited | Private company limited by shares | Live |
| CIELO GROUP LIMITED | Private company limited by shares | Live |
| CIELO Art Group Limited | Private company limited by shares | Live |
| CIELO STELLATO LIMITED | | Live |
| CIELO STELLATO AG LIMITED | | Live |
| Cielo Talent Limited | Private company limited by shares | Live |
| CieloUno Limited | Private company limited by shares | Live |
| Cielshine International Hong Kong Limited | | Live |
| CIEM MORGES LIMITED | Private company limited by shares | Dissolved |
| Cieman Limited | | Live |
| CIEMME LIMITED | Private company limited by shares | Dissolved |
| CIEN ONE LIMITED | Private company limited by shares | Live |
| CIEN F&B LIMITED | Private company limited by shares | Live |
| CIENDA LIMITED | Private company limited by shares | Dissolved |
| Cienega Limited | Private company limited by shares | Live |
| CIENJ HK LIMITED | Private company limited by shares | Live |
| HK CIENZE INTERNATIONAL INVESTMENT CO., LIMITED | Private company limited by shares | Live |
| CIER COMPANY LIMITED | Private company limited by shares | Dissolved |
| CIERA HK LIMITED | Private company limited by shares | Dissolved |
| Ciergo Limited | Private company limited by shares | Live |
| CIERRA HK LIMITED | Private company limited by shares | Live |
| CIERRA ASIA LIMITED | Private company limited by shares | Live |
| CIERRE ASIA LIMITED | Private company limited by shares | Dissolved |
| CIERVA COMPANY LIMITED | Private company limited by shares | Dissolved |
| CIES Limited | Private company limited by shares | Dissolved |
| CE CIES LIMITED | Private company limited by shares | Live |
| CIES Asia Limited | Private company limited by shares | Dissolved |
| CIES (H.K.) LIMITED | Private company limited by shares | Dissolved |
| Hong Kong CIES Properties Agency Limited | Private company limited by shares | Dissolved |
| Hong Kong CIES Limited | Private company limited by shares | Live |
| CHINA CIES MERCHANTS' ASSOCIATION LIMITED | Company limited by guarantee | Live |
| HK CIES Financial Professional Association Limited | | Live |
| Cieux Co., Limited | Private company limited by shares | Live |