| LAMSON LIMITED | Private company limited by shares | Dissolved |
| KOREA LAMSON BIOTECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| LAMSON ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| LAMSON INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| LAMSON INVESTMENTS LIMITED | Private company limited by shares | Live |
| LAMSON TRADING LIMITED | Private company limited by shares | Dissolved |
| LAMSONITE COMPANY LIMITED | Private company limited by shares | Live |
| LAMSONS COMPANY LIMITED | Private company limited by shares | Live |