| HYSAN COMPANY LIMITED | Private company limited by shares | Dissolved |
| Hysan Company Limited | Private company limited by shares | Live |
| HYSAN AVENUE PROPERTIES COMPANY LIMITED | Private company limited by shares | Dissolved |
| 33 Hysan Avenue Tenant Limited | Private company limited by shares | Live |
| BFF BURGER'S FRIEND FOREVER (HYSAN) LIMITED | | Live |
| HYSAN DEVELOPMENT COMPANY LIMITED | Public company limited by shares | Live |
| Hysan Technology Bio-Medical Development (HK) Limited | | Live |
| Hysan Engineer Limited | | Live |
| HYSAN ENGINEERING LIMITED | Private company limited by shares | Live |
| HYSAN ENTERPRISES LIMITED | Private company limited by shares | Live |
| LEE HYSAN ESTATE COMPANY, LIMITED | Private company limited by shares | Live |
| LEE HYSAN ESTATE COMPANY, LIMITED | Private company limited by shares | Live Commenced dormancy on 06-Sep-2018 |
| HYSAN FINANCE LIMITED | Private company limited by shares | Dissolved |
| LEE HYSAN FOUNDATION | Company limited by guarantee | Live |
| Hysan Investment (Fund) Limited | Private company limited by shares | Live |
| HYSAN GROUP LIMITED | Private company limited by shares | Dissolved |
| HYSAN HOLDING LIMITED | Private company limited by shares | Dissolved |
| Hysan (Hong Kong) Technology Limited | Private company limited by shares | Live |
| HYSAN INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| HYSAN LEASING COMPANY LIMITED | Private company limited by shares | Live |
| Hysan Max Management Limited | Private company limited by shares | Live |
| Hysan (China) Asset Management Limited | | Live |
| HYSAN PROPERTY MANAGEMENT LIMITED | Private company limited by shares | Live |
| HYSAN MARKETING SERVICES LIMITED | Private company limited by shares | Live |
| HYSAN TRADING MEDICINE LIMITED | Private company limited by shares | Live |
| HYSAN PHARMACEUTICAL COMPANY LIMITED | Private company limited by shares | Live |
| HYSAN PROJECT MANAGEMENT (PRC) LIMITED | Private company limited by shares | Dissolved |
| SUN CHIU KEE (HYSAN ROAD) COMPANY LIMITED | Private company limited by shares | Dissolved |
| HYSAN CORPORATE SERVICES LIMITED | Private company limited by shares | Live |
| HYSAN COMPANY SECRETARIAL SERVICES LIMITED | Private company limited by shares | Live |
| HYSAN TECHNOLOGY LIMITED | | Live |
| HYSAN TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| Hysan & Van Trading Limited | Private company limited by shares | Live |
| HYSAN TREASURY LIMITED | Private company limited by shares | Live |