| MANTECH COMPANY LIMITED | Private company limited by shares | Dissolved |
| MANTECH COMPANY LIMITED | Private company limited by shares | Dissolved |
| MANTECH ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| MANTECH GROUP LIMITED | Private company limited by shares | Live |
| MANTECH INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| MANTECH INVESTMENT LIMITED | Private company limited by shares | Live |
| MANTECH STRATEGIC LIMITED | Private company limited by shares | Live |
| MANTECH SYSTEM TECHNOLOGY LIMITED | Private company limited by shares | Live |
| MANTECH TRADING LIMITED | Private company limited by shares | Live |