| KOTAN LIMITED | Private company limited by shares | Live |
| KOTAN RESOURCES (CHINA) LIMITED | Private company limited by shares | Live |
| KOTAN ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| KOTAN (HONG KONG) COMPANY LIMITED | Private company limited by shares | Live |
| KOTAN SHIPPING & INVESTMENT COMPANY, LIMITED | Private company limited by shares | Dissolved |
| KOTAN PRO-TECH LIMITED | Private company limited by shares | Live |
| KOTAN RESOURCES LIMITED | Private company limited by shares | Dissolved |
| KOTAN TRADING LIMITED | Private company limited by shares | Dissolved |