| OCTEK LIMITED | Private company limited by shares | Dissolved |
| OCTEK TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| OCTEL NETWORKS LIMITED | Private company limited by shares | Live |
| Octenation Limited | Private company limited by shares | Live |
| OCTER GROUP LIMITED | Private company limited by shares | Live |
| M OCTET LIMITED | Private company limited by shares | Live Commenced dormancy on 27-Jan-2016 |
| OCTEX LIMITED | Private company limited by shares | Dissolved |
| OCTEX HOLDINGS LIMITED | Private company limited by shares | Live |
| OCTEX PROPERTY AGENCY LIMITED | Private company limited by shares | Live |
| OCTEX SPORTSWEARS LIMITED | Private company limited by shares | Dissolved |