| OCTAL LIMITED | Private company limited by shares | Dissolved |
| Octal Capital Limited | Private company limited by shares | Live |
| OCTAL ENGINEERING EQUIPMENT LIMITED | Private company limited by shares | Live |
| Octal Capital Holding Limited | Private company limited by shares | Live |
| Octal Holdings Limited | Private company limited by shares | Live |
| Octal International Limited | | Live |
| OCTAL KEERUN CO., LIMITED | Private company limited by shares | Live |
| Octal Capital Asset Management Limited | Private company limited by shares | Live |
| OCTAL TV NOVABASE LIMITED | Private company limited by shares | Live |
| Octal Securities Limited | Private company limited by shares | Live |
| Octal Services Limited | Private company limited by shares | Live |
| OCTAL WELLNESS LIMITED | | Live |
| OCTALAND HOLDINGS (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| OCTALINK LIMITED | Private company limited by shares | Dissolved |
| OCTALINK LIMITED | Private company limited by shares | Live |
| Octalix Asia Limited | Private company limited by shares | Dissolved |