| Company Name | Type | Status |
|---|---|---|
| CIRCO ONE LIMITED | Private company limited by shares | Live |
| CIRCO CONSULTANCY (ASIA) LIMITED | Private company limited by shares | Dissolved |
| Circolos (Hong Kong) Limited | Private company limited by shares | Dissolved |
| CIRCOM TRADING LIMITED | Private company limited by shares | Dissolved |
| Circon Technology (HK) Limited | Private company limited by shares | Live |
| CIRCONAMICS LIMITED | Private company limited by shares | Live |
| CIRCOOP LIMITED | Private company limited by shares | Live |