| Company Name | Type | Status |
|---|---|---|
| Kastle Limited | Private company limited by shares | Live |
| ELLIOT & KASTLE HK LIMITED | Private company limited by shares | Dissolved |
| KASTLE MANUFACTURING COMPANY LIMITED | Private company limited by shares | Live |
| KASTLE TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Kastler Innovation Limited | Private company limited by shares | Live |