| FIRSTEAM LIMITED | Private company limited by shares | Dissolved |
| FIRSTEAM INVESTMENT LIMITED | Private company limited by shares | Live |
| FIRSTEC ASIAPAC LIMITED | Private company limited by shares | Live |
| FIRSTEC MARITIME LIMITED | Private company limited by shares | Live |
| FIRSTECH LIMITED | Private company limited by shares | Dissolved |
| Firstech Limited | Private company limited by shares | Live |
| FIRSTEIGHT INTERNATIONAL TRADING CO., LIMITED | Private company limited by shares | Live |
| FIRSTELECOM.COM LIMITED | Private company limited by shares | Dissolved |
| FIRSTEN INDUSTRIAL LIMITED | Private company limited by shares | Live |
| FIRSTEP LIMITED | Private company limited by shares | Dissolved |
| Firstep Innovation Limited | | Live |
| Firstepbio Co., Limited | Private company limited by shares | Live |
| FirstEShop.net Limited | Private company limited by shares | Live |
| FIRSTEURO INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| FIRSTEX COMPANY LIMITED | Private company limited by shares | Dissolved |