| YOW YOON COMPANY LIMITED | Private company limited by shares | Dissolved |
| YO-ON LIMITED | Private company limited by shares | Dissolved |
| JA YOON LIMITED | Private company limited by shares | Dissolved |
| YOON LIMITED | Private company limited by shares | Live |
| Su Yoon Co., Limited | Private company limited by shares | Live |
| YOON NETWORKS CO., LIMITED | Private company limited by shares | Live |
| SE YOON TELEMATICS CO., LIMITED | Private company limited by shares | Dissolved |
| LONG YOON GROUP LIMITED | Private company limited by shares | Live |
| NORMAN YOON LIMITED | Private company limited by shares | Dissolved |
| Sung Yoon Company Limited | Private company limited by shares | Live |
| YOON THUNG COMPANY LIMITED | Private company limited by shares | Dissolved |
| YOON TRADING LIMITED | Private company limited by shares | Live |
| Yoona Limited | | Live |
| Yoona Trading Co., Limited | | Live |
| YOONA TRAVEL HK COMPANY LIMITED | Private company limited by shares | Dissolved |
| HONG KONG YOONGZIN TRADING CO., LIMITED | Private company limited by shares | Live |
| YOONIYOONI Company Limited | Private company limited by shares | Live |
| YOONJIANG LIMITED | Private company limited by shares | Live |
| YOON'S INC LIMITED | Private company limited by shares | Live |