| TACHYON LIMITED | Private company limited by shares | Dissolved |
| Tachyon Light Co., Limited | Private company limited by shares | Live |
| Tachyon Consulting & Management Company Limited | Private company limited by shares | Live |
| TACHYON INDUSTRIAL INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| TACHYON INTERNATIONAL LIMITED | | Live |
| Tachyon Asset Management Limited | Private company limited by shares | Live |
| Tachyon Media Limited | Private company limited by shares | Live |
| TACHYON MOTORSPORTS LIMITED | Private company limited by shares | Live |
| TACHYON RESEARCH LIMITED | Private company limited by shares | Dissolved |
| TACHYON SCIENTIFIC LIMITED | Private company limited by shares | Live |
| Tachyon Talent Solutions Limited | | Live |
| Tachyon Technologies Limited | Private company limited by shares | Dissolved |
| Tachyons Science & Technology Co., Limited | Private company limited by shares | Live |