| GRAMPUS LIMITED | Private company limited by shares | Live |
| Grampus Marine Co., Limited | | Live |
| GRAMPUS CONSULTANCY LIMITED -THE- | Private company limited by shares | Dissolved |
| GRAMPUS EDUCATION CENTRE LIMITED -THE- | Private company limited by shares | Dissolved |
| GRAMPUS ELECTRONICS LIMITED | Private company limited by shares | Live |
| GRAMPUS ENGINEERING COMPANY, LIMITED | Private company limited by shares | Dissolved |
| GRAMPUS INTERNATIONAL CO., LIMITED | Private company limited by shares | Dissolved |
| GRAMPUS SYSTEMS COMPANY LIMITED | Private company limited by shares | Dissolved |