| WESTONE COMPANY LIMITED | Private company limited by shares | Live |
| BEIJING WESTONE TECHNOLOGY CO. LIMITED | Private company limited by shares | Live |
| WESTONE (GERMANY) OIL CHEMICAL TECHNOLOGY DEVELOP CO., LIMITED | Private company limited by shares | Live |
| WESTONE (HK) TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| WESTONE HOLDINGS LIMITED | Private company limited by shares | Live |
| WESTONE (HONG KONG) LIMITED | Private company limited by shares | Live |
| WESTONE INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| WESTONE MACHINERY&ELECTRIC CO., LIMITED | Private company limited by shares | Live |
| Westone Marine Services Co., Limited | Private company limited by shares | Live |
| WESTONE TRADING TECH CO., LIMITED | Private company limited by shares | Live |