| Company Name | Type | Status |
|---|---|---|
| Hy-Ko Products (Asia) Company Limited | Private company limited by shares | Live |
| HYKOKO LIMITED | Private company limited by shares | Dissolved |
| Hykon Limited | Live | |
| HYKONG TRADE LIMITED | Private company limited by shares | Dissolved |
| Hykoont Limited | Live | |
| Hykop Limited | Private company limited by shares | Live |