| AMETHYST COMPANY LIMITED | Private company limited by shares | Dissolved |
| AMETHYST COMPANY LIMITED | Private company limited by shares | Dissolved |
| AMETHYST COMPANY LIMITED | Private company limited by shares | Live |
| AMETHYST 44 LIMITED | | Live |
| Amethyst Creative Limited | | Live |
| GRAND AMETHYST LIMITED | | Live |
| AMETHYST INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Amethyst Service Limited | Private company limited by shares | Live |
| Amethystum Optoelectronics Group Limited | Private company limited by shares | Live |
| Amethystum Storage Technology (HK) Co., Limited | Private company limited by shares | Live |