| IONI GROUP LIMITED | Private company limited by shares | Live |
| IONIA LIMITED | Private company limited by shares | Dissolved |
| Ionia Bag Co., Limited | Private company limited by shares | Live |
| IONIA SHIPPING LIMITED | Private company limited by shares | Dissolved |
| IONiaga Limited | Private company limited by shares | Live |
| Ionian Investments Limited | Private company limited by shares | Live |
| Ionian Spirit Shipping Limited | | Live |
| IONIC LIMITED | Private company limited by shares | Live |
| IONIC MERCANTILE LIMITED | Private company limited by shares | Dissolved |
| IONIC POWER LIMITED | Private company limited by shares | Live |
| IONICTECH LIMITED | Private company limited by shares | Live |
| IONIDES LIMITED | Private company limited by shares | Dissolved |
| IONION LIMITED | Private company limited by shares | Live |
| IONISAT ASIA LIMITED | Private company limited by shares | Dissolved |
| IONIX LIMITED | Private company limited by shares | Dissolved |
| IONIZAIR LIMITED | Private company limited by shares | Live |
| SEAWISE IONIZATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| IONIZED CO., LIMITED | Private company limited by shares | Live |
| IONIZED POWER COMPANY LIMITED | Private company limited by shares | Live |