| Olta Strategic Management Limited | Private company limited by shares | Dissolved |
| OLTARS Limited | Private company limited by shares | Dissolved |
| OLTEN LIMITED | Private company limited by shares | Dissolved |
| OLTEN TIME CO LIMITED | Private company limited by shares | Live |
| OLTERON GROUP LIMITED | Private company limited by shares | Live |
| OLTEX LIMITED | Private company limited by shares | Live |
| Oltgs Limited | Private company limited by shares | Live |
| OLTREMARE ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| OLTREMARE ASIA INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| OLTREMARE PROPERTIES LIMITED | Private company limited by shares | Dissolved |