| Onbo Co., Limited | Private company limited by shares | Live |
| ONBOARD LIMITED | Private company limited by shares | Live |
| OnBoard Asia Limited | Private company limited by shares | Live |
| On-Board Consultancy Limited | | Live |
| Onboard Global Limited | Private company limited by shares | Live |
| OnBoard for Good Limited | Private company limited by shares | Live |
| OnBoard Ship Management Limited | Private company limited by shares | Live |
| PILATES ONBOARD LIMITED | | Live |
| HONG KONG ONBOLE PCB CO., LIMITED | Private company limited by shares | Live |
| ONBON JEWELLERY TRADING LIMITED | Private company limited by shares | Live |
| ONBOND LIMITED | Private company limited by shares | Live |
| ONBONG LIMITED | Private company limited by shares | Dissolved |
| ONBOTH LIMITED | Private company limited by shares | Live Ceased dormancy on 23-Apr-1998 |