| OTEC LIMITED | Private company limited by shares | Live |
| OTECH COMPANY LIMITED | Private company limited by shares | Dissolved |
| O-TECH LIMITED | Private company limited by shares | Dissolved |
| O-TECH LIMITED | Private company limited by shares | Live |
| Otechku Limited | | Live |
| OTECO ASIA LIMITED | Private company limited by shares | Live |
| Shenzhen Oteco Technology Co., Limited | Private company limited by shares | Live |
| OTEE CO. LIMITED | Private company limited by shares | Live |
| Oteegee X Limited | Private company limited by shares | Live |
| O'TEEN ENTERPRISES COMPANY LIMITED | Private company limited by shares | Dissolved |
| OTEFUL INVESTMENT LIMITED | Private company limited by shares | Live |
| Otel Fitness Limited | Private company limited by shares | Live |
| Otel Industrial Limited | Private company limited by shares | Live |
| OTELLO LIMITED | Private company limited by shares | Dissolved |
| OTELLO SHIPBROKERS LIMITED | Private company limited by shares | Live |
| OTELMS LIMITED | Private company limited by shares | Live |
| OTEM TELECOMMUNICATION CO., LIMITED | Private company limited by shares | Live |
| OTEN CHARITABLE EDUCATION FUND LIMITED | Company limited by guarantee | Dissolved |
| OTEN TECHNOLOGY (HK) CO., LIMITED | Private company limited by shares | Dissolved |
| OTEN (HONG KONG) LIMITED | Private company limited by shares | Live |
| Oten Trans (Hong Kong) Company Limited | | Live |
| Otendo Electronics Limited | Private company limited by shares | Live |
| Hong Kong Otengxin Technology Co., Limited | | Live |
| OTENNLUX LIGHTING (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| Hong Kong Otento Trading Co., Limited | Private company limited by shares | Live |
| Otequ (HK) Limited | Private company limited by shares | Live |
| OTER LIMITED | Private company limited by shares | Dissolved |
| OTER LIMITED | Private company limited by shares | Live Commenced dormancy on 09-Mar-2016 |
| Otera Limited | | Live |
| OTERO LIMITED | Private company limited by shares | Dissolved |
| Carlos Otero Design HK, Limited | Private company limited by shares | Dissolved |
| OTC (Otero Trading Company) Limited | Private company limited by shares | Live |
| Otero Wine Limited | Private company limited by shares | Live |
| OTERPRISE LIMITED | Private company limited by shares | Dissolved |
| SHENZHEN OTESUN ELECTRONIC COMPANY LIMITED | Private company limited by shares | Dissolved |
| Otex Company Limited | Private company limited by shares | Live |
| OTEX LIMITED | Private company limited by shares | Live |
| Otex Trade Limited | Private company limited by shares | Live |