| Company Name | Type | Status |
|---|---|---|
| HILLSTON LIMITED | Private company limited by shares | Dissolved |
| Hillstone Limited | Live | |
| HILLSTONE (ASIA) CO., LIMITED | Private company limited by shares | Dissolved |
| HILLSTONE INCORPORATED LIMITED | Private company limited by shares | Live |
| HILLSTONE INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Hillstone Networks (HK) Limited | Private company limited by shares | Live |