| HELSA LIMITED | Private company limited by shares | Live |
| HELSA (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| HELSEN LIMITED | Private company limited by shares | Dissolved |
| HELSEN ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| HELSEN INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| Van Helsing Limited | Private company limited by shares | Live |
| HELSINGDALE LIMITED | Private company limited by shares | Dissolved |
| Helsinn (Hong Kong) Industry Co., Limited | Private company limited by shares | Live |
| HELSMAN LIMITED | Private company limited by shares | Dissolved |
| HELSON LIMITED | Private company limited by shares | Dissolved |
| HELSON HOLDING LIMITED | Private company limited by shares | Live |
| HELSTON CAPITAL LIMITED | Private company limited by shares | Live |
| HELSTON ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| HELSUN INDUSTRY CO., LIMITED | Private company limited by shares | Dissolved |
| HELSUN TECHNOLOGY (HK) CO., LIMITED | Private company limited by shares | Live |