| Key&C Co. Limited | Private company limited by shares | Live |
| Keycai Hongkong Limited | Private company limited by shares | Live |
| KEYCAN LIMITED | Private company limited by shares | Live |
| Hive Keychain Limited | Private company limited by shares | Live |
| Keychain Innovation Limited | | Live |
| KEI HING KEYCHAIN WORKS LIMITED | Private company limited by shares | Dissolved |
| KEYCHAMP LIMITED | Private company limited by shares | Dissolved |
| KEYCHASE INVESTMENT LIMITED | Private company limited by shares | Live |
| KEYCHENG COMPANY LIMITED | Private company limited by shares | Dissolved |
| KEYCHIP ELECTRONICS CO., LIMITED | Private company limited by shares | Live |
| KEYCHIP INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| Keychip Technology Limited | Private company limited by shares | Live |
| Keychron (HK) Innovation Limited | | Live |
| Keychron Tech Limited | Private company limited by shares | Live |
| KEYCITY LIMITED | Private company limited by shares | Dissolved |
| KEYCO LIMITED | Private company limited by shares | Dissolved |
| KEYCODE INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| Keycom Intellectual Property Limited | Private company limited by shares | Live |
| SERVICE SUPPLIER KEYCOMPONENT INTERNATIONAL TECHNOLOGY CO., LIMITED | Private company limited by shares | Dissolved |
| KEYCORE ENTERPRISE CO LIMITED | Private company limited by shares | Live |
| KEYCORE INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| KEYCORP LIMITED | Private company limited by shares | Live |
| Keycraft (HK) Limited | Private company limited by shares | Live |
| KeyCreate Limited | Private company limited by shares | Live |
| KEYCROP LIMITED | Private company limited by shares | Live |