| MARCON LIMITED | Private company limited by shares | Dissolved |
| MARCON LIMITED | Private company limited by shares | Live |
| MARCON INVESTMENT LIMITED | Private company limited by shares | Live |
| MARCON TRADING LIMITED | Private company limited by shares | Dissolved |
| MARCONA LIMITED | Private company limited by shares | Dissolved |
| MARCONI LIMITED | Private company limited by shares | Dissolved |
| MARCONI (CHINA) LIMITED | Private company limited by shares | Dissolved |
| MARCONI CHINA LIMITED | Private company limited by shares | Dissolved |
| MARCONI ELECTRONICS MANUFACTURER COMPANY LIMITED | Private company limited by shares | Dissolved |
| MARCONI HONG KONG LIMITED | Private company limited by shares | Dissolved |
| MARCONI TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| MARCONTROL LIMITED | Private company limited by shares | Live |
| MARCONY LIMITED | | Live |