| Novum Limited | Private company limited by shares | Live |
| NOVUM CLEANING COMPANY LIMITED | Private company limited by shares | Dissolved |
| PRE-SCHOOL HABITAT (NOVUM EAST) CO. LIMITED | Private company limited by shares | Live |
| Novum Engineering Company Limited | Private company limited by shares | Live |
| Novum Group Limited | | Live |
| NOVUM PHARMA LIMITED | Private company limited by shares | Live |
| NovumC Consulting Limited | Private company limited by shares | Live |
| NovuMedical Co., Limited | Private company limited by shares | Live |
| NovuMind HK Limited | Private company limited by shares | Live |