| DIPLOM LIMITED | Private company limited by shares | Dissolved |
| DIPLOMA ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| DIPLOMA INVESTMENT LIMITED | Private company limited by shares | Live |
| Diplomat Limited | Private company limited by shares | Live |
| DIPLOMAT CLOTHIERS LIMITED | Private company limited by shares | Live |
| DIPLOMAT W.E. CO., LIMITED | Private company limited by shares | Live |
| DIPLOMATIC AGENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| DIPLOMATIC CORPS SERVICE LIMITED | Private company limited by shares | Dissolved |