| o.ki Limited | Private company limited by shares | Live |
| OKIAN INVENT COMPANY LIMITED | Private company limited by shares | Live |
| OKiBOOK Limited | Private company limited by shares | Live |
| OKIC LIMITED | Private company limited by shares | Dissolved |
| OKICE LIMITED | | Live |
| OKI&CO LIMITED | | Live |
| O-kids Performing Arts School Limited | Private company limited by shares | Live |
| BAKERSFIELD OKIE SALES AND LEASING LIMITED | Private company limited by shares | Dissolved |
| OKIE DOKIE LIMITED | Private company limited by shares | Dissolved |
| Okie Dokie Limited | Private company limited by shares | Live |
| OKIEA CO., LIMITED | Private company limited by shares | Live |
| OKIEA GROUP LIMITED | Private company limited by shares | Live |
| Okiedog Limited | Private company limited by shares | Live |
| Okienos Company Limited | Private company limited by shares | Live |
| OKIN CHINA LIMITED | Private company limited by shares | Live |
| OKIN TECHNOLOGY LIMITED | Private company limited by shares | Live |
| OKINA LIMITED | Private company limited by shares | Dissolved |
| OKINAWA LIMITED | Private company limited by shares | Dissolved |
| OKINAYA ENTERTAINMENT LIMITED | | Live |
| Okinet Co., Limited | Private company limited by shares | Live |
| OKINI (HK) LIMITED | Private company limited by shares | Live |
| OKINIL COMPANY LIMITED | | Live |
| OKINO LIMITED | Private company limited by shares | Dissolved |
| OKION FAR EAST LIMITED | Private company limited by shares | Live Commenced dormancy on 16-Feb-2015 |
| OKIT LIMITED | Private company limited by shares | Dissolved |
| O'KIT INTERNATIONAL TRADING CO. LIMITED | Private company limited by shares | Live |
| OKITANA COMPANY LIMITED | Private company limited by shares | Live |
| Okitech Electronic Limited | Private company limited by shares | Live |