| HYUNDAI ELECTROMECHANICS LIMITED | Private company limited by shares | Live |
| HYUNDAI PACIFIC COMPANY LIMITED | Private company limited by shares | Dissolved |
| KOREA HYUNDAL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| HYUNDO INTERNATIONAL CO., LIMITED | Private company limited by shares | Dissolved |
| HAN HYUNG SUN COMPANY LIMITED | Private company limited by shares | Dissolved |
| HYUNGJUN LIMITED | Private company limited by shares | Live |
| HONG KONG HYUNION ELECTRONICS CO., LIMITED | Private company limited by shares | Live |
| HYUNJIN COM COMPANY LIMITED | Private company limited by shares | Dissolved |
| HYUNJIN TNI COMPANY LIMITED | Private company limited by shares | Live |
| HYUNJIN ELECTRONICS (H.K.) CO., LIMITED | Private company limited by shares | Live |
| HYUNJIN (HONGKONG) CO., LIMITED | Private company limited by shares | Dissolved |
| HYUNJU COMPUTER (CHINA) CO., LIMITED | Private company limited by shares | Dissolved |
| HYUNKING LIMITED | Private company limited by shares | Live |
| HYUNKOOK (HK) MACHINERY LIMITED | Private company limited by shares | Live |
| HYUNSANG MACHINERY (HONGKONG) LIMITED | Private company limited by shares | Live |
| Hyunshow Company Limited | | Live |
| Hyunwoo Co., Limited | | Live |
| HYUNWOO SHIPPING CO., LIMITED | Private company limited by shares | Dissolved |
| HYUNWOO INDUSTRIAL CO., LIMITED | | Live |
| DAI HYUP LIMITED | Private company limited by shares | Dissolved |
| HYUPSUNG TEX LIMITED | Private company limited by shares | Live |
| HYURONG (HK) CO., LIMITED | Private company limited by shares | Dissolved |
| HYUTTE INTERNATIONAL TRADING LIMITED | Private company limited by shares | Dissolved |
| Hyva Holding Hong Kong Limited | Private company limited by shares | Live |
| HYVALUE LIMITED | Private company limited by shares | Dissolved |
| Hyvarwey Technology HK Limited | | Live |
| HONGKONG HY-VOTECH CO., LIMITED | Private company limited by shares | Live |
| HYWAY COMPANY LIMITED | Private company limited by shares | Dissolved |
| Hywayland Commercial Co., Limited | Private company limited by shares | Dissolved |
| HYWEE TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| Hywel Hong Kong Group Limited | Private company limited by shares | Live |
| HYWEST INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| HYWH LIMITED | Private company limited by shares | Live |
| HYWILSON COMPANY LIMITED | Private company limited by shares | Dissolved |
| HYWIN INVESTMENT HOLDING COMPANY LIMITED | Private company limited by shares | Live |
| Hywind Watersport Limited | Private company limited by shares | Live |
| HYWING TECHNOLOGY LIMITED | Private company limited by shares | Live |
| HONG KONG HYWISDOM INVESTMENTS CO., LIMITED | Private company limited by shares | Live |
| HYWJ INVESTMENTS MANAGEMENT LIMITED | Private company limited by shares | Live |
| HYWOOD INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| HYxind Techno Trading Limited | | Live |
| HYXINR TRADE LIMITED | | Live |
| HYYF.HK. LIMITED | Private company limited by shares | Live |
| HYYH GROUP LIMITED | Private company limited by shares | Live |
| HYYH TRADE LIMITED | Private company limited by shares | Live |
| Hyyhhyy Limited | | Live |
| HYYI CO., LIMITED | Private company limited by shares | Live |
| HYY-MOLD CO., LIMITED | Private company limited by shares | Live |
| HYZC TRADE LIMITED | | Live |
| Hyzen International Limited | | Live |
| HYZING LIMITED | Private company limited by shares | Dissolved |
| HYZLYK CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| HYZLYK INTERNATIONAL LIMITED | Private company limited by shares | Live |
| HYZLYK MEMBRANCE TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| NE TKM HYZMAT LIMITED | Private company limited by shares | Live |
| HYZONA RESOURCES LIMITED | | Live |
| Hyzyuan Technology Co., Limited | Private company limited by shares | Live |