| Company Name | Type | Status |
|---|---|---|
| HDDMP INC. LIMITED | Private company limited by shares | Dissolved |
| HDDMP INC. LIMITED | Private company limited by shares | Dissolved |
| HDDNOA AMERICA ENGINE CO., LIMITED | Private company limited by shares | Live |
| HDDNOA TECHNOLOGY LIMITED | Private company limited by shares | Live |
| HDD-SEA Limited | Private company limited by shares | Live |
| HDDT International Limited | Private company limited by shares | Live |