| CARDIA LIMITED | Private company limited by shares | Dissolved |
| One Cardiac Limited | Private company limited by shares | Live |
| ADVANCED CARDIAC CARE LIMITED | Private company limited by shares | Live |
| CARDIAC ASIA LIMITED | Private company limited by shares | Dissolved |
| Cardiac Care Limited | Private company limited by shares | Live |
| Locke Cardiac Centre Limited | Private company limited by shares | Live |
| ASIA CARDIAC CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| Cardiac Excel Limited | Private company limited by shares | Live |
| GIANT CARDIAC DIAGNOSTIC CENTER COMPANY LIMITED -THE- | Private company limited by shares | Dissolved |
| CARDIAC HEALTH HEART CENTRE LIMITED | Private company limited by shares | Live |
| HONG KONG CARDIAC CENTER LIMITED | Private company limited by shares | Live |
| Hong Kong College of Cardiac Nursing Limited | Company limited by guarantee | Live |
| Hong Kong Cardiac Nursing Association Limited | Company limited by guarantee | Live |
| MicroPort Cardiac Rhythm Management Limited | Private company limited by shares | Live |
| CARDIAC RHYTHM LIMITED | Private company limited by shares | Dissolved |
| CARDIAC GUIDANCE SERVICES LIMITED | Private company limited by shares | Live |
| Specialist Cardiac Care Limited | | Live |
| Cardiac Technology Limited | | Live |
| HKP Cardiac Thoracic Limited | Private company limited by shares | Live |
| Cardiag HK Limited | Private company limited by shares | Live |
| CARDIAN COMPANY LIMITED | Private company limited by shares | Dissolved |
| CARDIAN UNDERWRITERS LIMITED | Private company limited by shares | Dissolved |
| Cardiax AI Limited | Private company limited by shares | Live |
| Cardiax Lab (Asia) Limited | Private company limited by shares | Live |