| OSR KLASS LIMITED | Private company limited by shares | Live |
| KLASS COMPANY LIMITED | Private company limited by shares | Live |
| KLASS DIAMONDS LIMITED | Private company limited by shares | Live |
| TOP KLASSE LIMITED | Private company limited by shares | Live |
| PRIMA KLASSE COMPANY LIMITED | Private company limited by shares | Dissolved |
| Klassinco Technologies HK Limited | Private company limited by shares | Live |
| KLASSISCH ADVERTISING MEDIA GROUP (HONGKONG) LIMITED | Private company limited by shares | Dissolved |
| Klassisk Investment Limited | Private company limited by shares | Live |
| KLASSNO FOODS LIMITED | Private company limited by shares | Dissolved |