| XMG (OT) Limited | Private company limited by shares | Live |
| O.T. CO., LIMITED | Private company limited by shares | Live |
| HardWin O.T. Company Limited | Private company limited by shares | Live |
| O.T.A. COMPANY LIMITED | Private company limited by shares | Dissolved |
| OTAGIZ LTG LIMITED | Private company limited by shares | Dissolved |
| OTAGO COMPANY LIMITED | Private company limited by shares | Dissolved |
| Otago Bay Limited | Private company limited by shares | Live |
| Otago Advisors Limited | Private company limited by shares | Live |
| OTAGO CO., LIMITED | Private company limited by shares | Live |
| Otago Harbour Limited | Private company limited by shares | Live |
| FRANCE OTAGO INT'L GROUP CO. LIMITED | Private company limited by shares | Dissolved |
| Otago Marketing Limited | Private company limited by shares | Live |
| OTAGO TRADING LIMITED | Private company limited by shares | Dissolved |
| OTAI TIRE CO., LIMITED | Private company limited by shares | Live |
| OTAISU (HONG KONG) LIMITED | | Live |
| OTAK LIMITED | Private company limited by shares | Live |
| OTAK INTERNATIONAL PTY LIMITED | Private company limited by shares | Live |
| ISRAEL OTAK NOBEL CHEMIC-INDUSTRIAL GROUP LIMITED | Private company limited by shares | Dissolved |
| OTAK TRADING PTY LIMITED | Private company limited by shares | Dissolved |
| Otaki Limited | Private company limited by shares | Live |
| Otaki Investment Limited | Private company limited by shares | Live |
| Otakuni Limited | | Live |
| OTAKUPAY LIMITED | Private company limited by shares | Live |
| Otall Limited | | Live |
| OTALY MANUFACTURING LIMITED | Private company limited by shares | Dissolved |
| Otamendi Limited | Private company limited by shares | Live |
| OTAMI.COM LIMITED | Private company limited by shares | Dissolved |
| OTANI COMPANY LIMITED | Private company limited by shares | Dissolved |
| OTANI INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| OtanOlogy Limited | | Live |
| Otanta Limited | Private company limited by shares | Live |
| O-TAPE COMPANY LIMITED | Private company limited by shares | Live |
| OTAR INTERNATIONAL NEW TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| OTARD COMPANY LIMITED | Private company limited by shares | Dissolved |
| OTARI LIMITED | Private company limited by shares | Dissolved |
| OTARLEY LIMITED | Private company limited by shares | Live |
| HK OTAS INTERNATIONAL IMPORT&EXPORT TRADE CO., LIMITED | Private company limited by shares | Live |
| OTAT IND COMPANY LIMITED | Private company limited by shares | Live |
| OTATRONIC LIMITED | Private company limited by shares | Dissolved |
| Otaty Limited | Private company limited by shares | Live |
| OTAX HONG KONG LIMITED | Private company limited by shares | Live |
| OTAX INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| OTAX METAL PARTS COMPANY LIMITED | Private company limited by shares | Live |
| OTAZU (ASIA) LIMITED | Private company limited by shares | Live |
| O.T.B. INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| OTB-KIDS COMPANY LIMITED | Private company limited by shares | Live |
| OTBO CO. LIMITED | Private company limited by shares | Live |
| O.T.C. RETAIL COMPANY LIMITED | Private company limited by shares | Live |
| OTCAH LIMITED | Private company limited by shares | Live |
| OTCEX GROUP LIMITED | Private company limited by shares | Live |
| OTCex Hong Kong Limited | Private company limited by shares | Live |
| Otcgate Co., Limited | Private company limited by shares | Live |
| CHINA OTCM INVESTMENT LEAGUE CO., LIMITED | Private company limited by shares | Live |
| OTCOS LIMITED | Private company limited by shares | Live |
| OTCPAY LIMITED | Private company limited by shares | Live |
| OTDI TRADING CO., LIMITED | Private company limited by shares | Live |
| 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 |
| OTFORD ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| OTFORD INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| Otfx Co., Limited | Private company limited by shares | Live |
| OTGEO INVESTMENT LIMITED | | Live |
| O.T.H. Limited | Private company limited by shares | Dissolved |
| OTHAM INVESTMENT LIMITED | Private company limited by shares | Dissolved |