| AACHEN LIMITED | Private company limited by shares | Dissolved |
| Aachen Metal Casting (Asia) Limited | Private company limited by shares | Live |
| AaChen Connect Co., Limited | Private company limited by shares | Live |
| Hong Kong Aachen Trading Co., Limited | Private company limited by shares | Live |
| AACHEN TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| Aachen Optoelectronic Technology Co., Limited | Private company limited by shares | Live |
| AACHEN COMMERCE LIMITED | Private company limited by shares | Live |
| AACHEN (ASIA PACIFIC) CONSULTANTS LIMITED | Private company limited by shares | Live |
| AaChen Technology Development Corporation Limited | Private company limited by shares | Live |
| AACHEN INTERNATIONAL TRADING LIMITED | Private company limited by shares | Live |