| HKEX (China) Limited | Private company limited by shares | Live |
| HKEX Investment (China) Limited | Private company limited by shares | Live |
| HKEX Diamond Limited | | Live |
| HKEX Foundation Limited | Company limited by guarantee | Live |
| HKEX Investment (Hong Kong) Limited | Private company limited by shares | Live |
| HKEX Information Services Limited | Private company limited by shares | Live |
| HKEX Information Services (China) Limited | | Live |
| HKEX International Limited | Private company limited by shares | Live |
| HKEX Private Markets Limited | | Live |
| HKEX Property Limited | Private company limited by shares | Live |
| HKEX Hosting Services Limited | Private company limited by shares | Live |
| HKEX Post Trade Services Limited | Private company limited by shares | Live |
| HKEX (SINGAPORE) LIMITED | Private company limited by shares | Dissolved |
| HKExcel Education Limited | Private company limited by shares | Live |
| HKExcel Resources Limited | | Live |
| HKEXLIVE OVERSEAS PROPERTY LIMITED | | Live |
| HKEXPATS LIMITED | Private company limited by shares | Dissolved |
| HKexplace Limited | Private company limited by shares | Live |