| OASYS CYBER LIMITED | Private company limited by shares | Live |
| O.A.T Technology Limited | | Live |
| OATA LIMITED | Private company limited by shares | Dissolved |
| OATA LIMITED | Private company limited by shares | Live |
| OATAR LIMITED | Private company limited by shares | Live Commenced dormancy on 01-Aug-2016 |
| OATDIAL LIMITED | Private company limited by shares | Dissolved |
| OATDIAL (SHENZHEN) TOYS MANUFACTORY LIMITED | Private company limited by shares | Dissolved |
| OATES COMPANY LIMITED | Private company limited by shares | Dissolved |
| OATES TECHNOLOGIES CO., LIMITED | Private company limited by shares | Live |
| Oatey Asia Co., Limited | Private company limited by shares | Live |
| OATH CAPITAL LIMITED | Private company limited by shares | Live |
| OATH SIGN LIMITED | | Live |
| Oath Venture Limited | Private company limited by shares | Live |
| OATHLEX LIMITED | Private company limited by shares | Dissolved |
| OATHLOVE LIMITED | | Live |
| OATIN LIMITED | Private company limited by shares | Live |
| OATLEY LIMITED | Private company limited by shares | Dissolved |
| OATLY DEVELOPMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| Oatly Hong Kong Holding Limited | Private company limited by shares | Live |
| OATMAN COMPANY LIMITED | Private company limited by shares | Dissolved |
| Oatson Enterprises Limited | Private company limited by shares | Live |
| OAVAA TRADING LIMITED | Private company limited by shares | Live |
| OAVIC CO., LIMITED | Private company limited by shares | Live |
| OAXACA INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| OAXIX CO. LIMITED | Private company limited by shares | Live |
| OAZON LIMITED | Private company limited by shares | Live |