| ONMAIN LIMITED | Private company limited by shares | Dissolved |
| ONMAN INVESTMENTS LIMITED | Private company limited by shares | Live |
| ONMARCH LIMITED | Private company limited by shares | Dissolved |
| ONMARK LIMITED | Private company limited by shares | Dissolved |
| ONMARK LIMITED | Private company limited by shares | Dissolved |
| ONMARK ENTERPRISES LIMITED | Private company limited by shares | Live |
| ONMARK METALS LIMITED | Private company limited by shares | Live |
| ON-MASSY LIMITED | Private company limited by shares | Dissolved |
| ON-MASSY CO., LIMITED | Private company limited by shares | Live |
| ONMATE LIMITED | Private company limited by shares | Live |
| ONMATE ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| ONMATE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| ONMATE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| ONMATE MANAGEMENT LIMITED | Private company limited by shares | Dissolved |
| ONMATE RESOURCES LIMITED | Private company limited by shares | Dissolved |
| ONMATE TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| ONMATE TRADING LIMITED | Private company limited by shares | Dissolved |
| ONMAX DEVELOPMENTS LIMITED | Private company limited by shares | Dissolved |
| ONMAX ENTERPRISES LIMITED | Private company limited by shares | Live |
| ONMAX INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| ON-MAX INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| ONMAX INVESTMENT LIMITED | Private company limited by shares | Live |
| ONMAX PROPERTIES LIMITED | Private company limited by shares | Live |
| ONMAX TRADING LIMITED | Private company limited by shares | Dissolved |
| ONMAX TRADING LIMITED | Private company limited by shares | Live |
| ONMAY LIMITED | Private company limited by shares | Live |