| MEGASON LIMITED | Private company limited by shares | Live |
| Megason Technology (Hong Kong) Co., Limited | | Live |
| MEGASON INTERNATIONAL LIMITED | Private company limited by shares | Live |
| MEGASONIC LIMITED | Private company limited by shares | Dissolved |
| MEGASONIC ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| MEGASONIC INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Megasonic Technology Limited | Private company limited by shares | Live |
| MEGASONIC TRADING LIMITED | Private company limited by shares | Dissolved |