| OTIC LIMITED | Private company limited by shares | Live |
| OTIC HEARING & SPEECH SERVICE CENTRE (CENTRAL) LIMITED | Private company limited by shares | Dissolved |
| OTIC HEARING & SPEECH SERVICE CENTRE LIMITED | Private company limited by shares | Live |
| OTIC DIGITECH LIMITED | Private company limited by shares | Live |
| OTIC FOUNDATION LIMITED | Company limited by guarantee | Live |
| OTIC HONG KONG COMPANY LIMITED | Private company limited by shares | Live |
| OTIC MEDIA LIMITED | Private company limited by shares | Live |
| OTIC TECH TIME CO. LIMITED | Private company limited by shares | Live Commenced dormancy on 03-Sep-2013 |
| OTIC TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Live Commenced dormancy on 03-Sep-2013 |
| OTICO LIMITED | Private company limited by shares | Dissolved |