| HAYS LIMITED | Private company limited by shares | Dissolved |
| Hays Bio-Tech Company Limited | Private company limited by shares | Live |
| Hays Construction Limited | Private company limited by shares | Live |
| HAYS CONSULTING LIMITED | | Live |
| HAYS Consulting Engineers (HK) Limited | Private company limited by shares | Live |
| Hays Enterprise Corporation Limited | Private company limited by shares | Live |
| Hay's Engineering Limited | Private company limited by shares | Live |
| HAYS ENGINEERING (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| Walter Hays Fashion (HK) Limited | Private company limited by shares | Live |
| Hay's Fitness Limited | | Live |
| HAYS HOLDING LIMITED | | Live |
| HAYS HONG KONG LIMITED | Private company limited by shares | Live |
| Hays International Limited | | Live |
| HAYS ORIENTAL HOLDING LIMITED | | Live |
| Hays Studio Limited | | Live |
| HAYS TRADING LIMITED | | Live |
| Hays Professional Training Company Limited | | Live |
| HAYSAN DISTRIBUTION LIMITED | Private company limited by shares | Live |
| HAYSAN ELECTRICAL ENGINEERING LIMITED | Private company limited by shares | Live |
| HAYSAN ENTERPRISE LIMITED | Private company limited by shares | Live |
| HAYSAN INVESTMENT LIMITED | Private company limited by shares | Live |
| Haysboro Resources Co., Limited | Private company limited by shares | Live |
| HAYSELTON ENTERPRISES LIMITED | Private company limited by shares | Live |
| HAYSEN LIMITED | Private company limited by shares | Dissolved |
| HAYSEN LIMITED | Private company limited by shares | Live |
| HAYSIAN TRADE LIMITED | Private company limited by shares | Live |
| HAYSLEP INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| Hayslon Trading Company Limited | Private company limited by shares | Live |
| HAYSMILE LIMITED | Private company limited by shares | Live |
| HAYSON LIMITED | Private company limited by shares | Live |
| Hayson Brands Limited | Private company limited by shares | Live |
| HAYSON CO., LIMITED | Private company limited by shares | Dissolved |
| Hayson Inflight Co., Limited | Private company limited by shares | Live |
| HAYSON CONCEPT LIMITED | Private company limited by shares | Live |
| HAYSON DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| HAYSON DEVELOPMENT LIMITED | Private company limited by shares | Live |
| HAYSON ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| HAYSON ENGINEERING LIMITED | Private company limited by shares | Live |
| Hayson Engineering & Consulting Limited | | Live |
| HAYSON ENTERPRISES LIMITED | Private company limited by shares | Live |
| HAYSON GROUP LIMITED | Private company limited by shares | Dissolved |
| HAYSON (H.K.) ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| HONGKONG HAYSON LIMITED | Private company limited by shares | Dissolved |
| HAYSON INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Hayson International Services Company Limited | Private company limited by shares | Live |
| HAYSON INTERNATIONAL TRADING LIMITED | Private company limited by shares | Dissolved |
| HAYSON INVESTMENT LIMITED | Private company limited by shares | Live |
| HAYSON RECRUITMENT SERVICES LIMITED | Private company limited by shares | Live |
| HAYSON TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| HAYSTACK COMPANY LIMITED | Private company limited by shares | Dissolved |
| HAYSTAR LIMITED | Private company limited by shares | Live |
| HAYSTIN TRADING LIMITED | Private company limited by shares | Dissolved |
| HAYSTON LIMITED | Private company limited by shares | Dissolved |
| HAYSUN LIMITED | Private company limited by shares | Live |
| HAYSWHARF LIMITED | Private company limited by shares | Live |
| HAYSWING CO., LIMITED | Private company limited by shares | Live |
| HAYSYATE TRADING CO LIMITED | Private company limited by shares | Live |