| O.N.K. Mining & Construction (HK) Co. Limited | Private company limited by shares | Live |
| O.N.K TRADING LIMITED | Private company limited by shares | Live |
| Onka Trading Limited | | Live |
| ONKAAR LIMITED | | Live |
| ONKAI ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| ONKAI INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| ONKAI INTERNATIONAL LIMITED | Private company limited by shares | Live |
| ONKAK LIMITED | Private company limited by shares | Dissolved |
| ONKAMCHUEN COMPANY LIMITED | Private company limited by shares | Live |
| ONKAR GLOBAL TRADING COMPANY LIMITED | | Live |
| ONKAY CO. LIMITED | Private company limited by shares | Dissolved |
| ONKAY MOULDING LIMITED | Private company limited by shares | Dissolved |
| ONKEE MOTOR LIMITED | Private company limited by shares | Live |
| ONKEE (NZ) COMPANY LIMITED | Private company limited by shares | Dissolved |
| Shenzhen Onkee Technology Limited | Private company limited by shares | Live |
| ONKEEN LIMITED | Private company limited by shares | Dissolved |
| ONKEEN ENTERPRISE LIMITED | Private company limited by shares | Live |
| Onken Advanced Materials (Hong Kong) Company Limited | | Live |
| ONKENT LIMITED | Private company limited by shares | Dissolved |
| ONKEST PROPERTIES LIMITED | Private company limited by shares | Dissolved |
| HK ONKHUN TRADE LIMITED | Private company limited by shares | Live |
| ONKI ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| ONKI LIFESTYLE LIMITED | Private company limited by shares | Live |
| ONKI RESOURCES LIMITED | Private company limited by shares | Dissolved |
| ONKI SHIPPING LIMITED | Private company limited by shares | Dissolved |
| ONKI TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| ONKI TRANSPORTATION LIMITED | Private company limited by shares | Dissolved |
| ONKIND ENTERPRISES LIMITED | Private company limited by shares | Live |
| ONKING COMPANY LIMITED | Private company limited by shares | Dissolved |
| ONKING SHOES & APPAREL LIMITED | Private company limited by shares | Live |
| ON-KING HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| ONKINNS INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| ONKINS & ASSOCIATE LIMITED | Private company limited by shares | Dissolved |
| ONKIT INC LIMITED | Private company limited by shares | Live |
| ONKIT INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| ONKO LIMITED | Private company limited by shares | Dissolved |
| ONKOD ENTERPRISE CO., LIMITED | Private company limited by shares | Live |
| ONKOK LIMITED | Private company limited by shares | Dissolved |
| ONKOK INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| Onkon Group Limited | Private company limited by shares | Live |
| TOKYO ONKYO LIMITED | Private company limited by shares | Live |