| Mems HK Limited | | Live |
| MEMSEO ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| MEMSIC SEMICONDUCTION (HK) CO., LIMITED | Private company limited by shares | Live |
| MEMSIE LIMITED | Private company limited by shares | Dissolved |
| MEMSIS ELECTRONICS LIMITED | Private company limited by shares | Live |
| MEMSky Limited | | Live |
| MEMSTAR BEAUTY LIMITED | Private company limited by shares | Live |
| MEMSTAR TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Memstar Water (Hong Kong) Limited | Private company limited by shares | Dissolved |
| Memsun Limited | Private company limited by shares | Dissolved |
| Memsun Technology Limited | Private company limited by shares | Dissolved |
| Memsun Universal Limited | Private company limited by shares | Dissolved |
| Memsun World Wide Limited | Private company limited by shares | Dissolved |
| Memsys Asia Limited | Private company limited by shares | Live |