| ONSTABLE LIMITED | Private company limited by shares | Dissolved |
| ON-STAGE LIMITED | Private company limited by shares | Dissolved |
| Onstage Limited | Private company limited by shares | Live |
| ON-STAGE INVESTMENT LIMITED | Private company limited by shares | Live |
| ONSTAGE INVESTMENTS LIMITED | Private company limited by shares | Live Ceased dormancy on 19-Feb-2010 |
| ON-STAGE.HK LIMITED | Private company limited by shares | Dissolved |
| ONSTANDARD LIMITED | Private company limited by shares | Dissolved |
| ONSTAR COMPANY LIMITED | Private company limited by shares | Dissolved |
| ONSTAR (ASIA) LIMITED | Private company limited by shares | Live |
| Onstar (Asia) Limited | Private company limited by shares | Live |
| ONSTAR (CHINA) LIMITED | Private company limited by shares | Dissolved |
| ONSTAR CORPORATION LIMITED | Private company limited by shares | Live |
| ONSTAR ELECTRONICS LIMITED | Private company limited by shares | Dissolved |
| ONSTAR ELECTRONICS CO., LIMITED | Private company limited by shares | Live |
| ONSTAR ELECTRONICS GROUP CO., LIMITED | | Live |
| ONSTAR ENGINEERING LIMITED | Private company limited by shares | Live |
| ONSTAR ENTERPRISES LIMITED | Private company limited by shares | Live |
| ONSTAR ESTATE LIMITED | Private company limited by shares | Dissolved |
| ONSTAR INTERNATIONAL EXPRESS LIMITED | Private company limited by shares | Dissolved |
| ONSTAR GROUP LIMITED | Private company limited by shares | Dissolved |
| OnStar Advisory Group Limited | Private company limited by shares | Live |
| ONSTAR (H.K.) LIMITED | Private company limited by shares | Live |
| ONSTAR GARMENT H.K. LIMITED | Private company limited by shares | Dissolved |
| ONSTAR INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| ONSTAR INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| ONSTAR INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| ONSTAR INVESTMENTS LIMITED | Private company limited by shares | Live |
| ONSTAR (OVERSEAS) LIMITED | Private company limited by shares | Dissolved |
| ONSTAR INTERNATIONAL TECH LIMITED | | Live |
| ONSTAR TECHNOLOGY LIMITED | Private company limited by shares | Live |
| ONSTEP COMPANY LIMITED | Private company limited by shares | Dissolved |
| ONSTEP LIMITED | Private company limited by shares | Dissolved |
| ONSTILL LIMITED | Private company limited by shares | Dissolved |
| ONSTOCK LIMITED | Private company limited by shares | Dissolved |
| ONSTON INVESTMENT LIMITED | Private company limited by shares | Live |
| ONSTRIDE INVESTMENT LIMITED | Private company limited by shares | Live |
| ONSTRONG LIMITED | Private company limited by shares | Dissolved |