| ATC Semitec Limited | Private company limited by shares | Live |
| SEMITECH LIMITED | Private company limited by shares | Live |
| SEMITECH ENG LIMITED | Private company limited by shares | Live |
| Semi-tech Limited | | Live |
| Semitech Innovations Limited | Private company limited by shares | Live |
| SEMITEK LIMITED | Private company limited by shares | Dissolved |
| HC SemiTek Limited | Private company limited by shares | Live |
| SEMi-Tel Limited | Private company limited by shares | Live |
| SEMITEL ELECTRONICS CO., LIMITED | Private company limited by shares | Live |
| SEMITEREO CO., LIMITED | Private company limited by shares | Live |
| SEMITEX LIMITED | Private company limited by shares | Dissolved |