| ONTECH SUPREME ENGINEERING LIMITED | Private company limited by shares | Live |
| Ontech Technology Co., Limited | Private company limited by shares | Live |
| ONTECH (HK) TECHNOLOGY LIMITED | Private company limited by shares | Live |
| ONTECH INTERNATIONAL TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| ONTECH TRADING LIMITED | Private company limited by shares | Live |
| OnTeck Limited | Private company limited by shares | Live |
| OnTeck Group Limited | Private company limited by shares | Live |
| ONTEGOS LIMITED | Private company limited by shares | Live |
| ONTEIC LIMITED | Private company limited by shares | Dissolved |
| ON-TEK COMPANY LIMITED | Private company limited by shares | Dissolved |
| ONTELE COMPANY LIMITED | Private company limited by shares | Dissolved |
| ONTELE COMPANY LIMITED | Private company limited by shares | Dissolved |
| ON-TEN LIMITED | Private company limited by shares | Live |
| ONTERRACE LIMITED | Private company limited by shares | Dissolved |
| ONTERY LIMITED | Private company limited by shares | Dissolved |
| ONTEX LIMITED | Private company limited by shares | Dissolved |
| ONTEX LIMITED | Private company limited by shares | Dissolved |
| ONTEX ENTERPRISES LIMITED | Private company limited by shares | Live |
| ONTEX INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| ONTEX RESERVE COMPANY LIMITED | Private company limited by shares | Live |
| ONTEX TRADING LIMITED | Private company limited by shares | Dissolved |
| ONTHEBLOOM LIMITED | Private company limited by shares | Live |
| QUEST ONTHEFRONTIER LIMITED | Private company limited by shares | Live |
| ONTHEGO COMPANY LIMITED | Private company limited by shares | Dissolved |
| OTG OnTheGo Limited | Private company limited by shares | Live |
| OnTheGoSystems Limited | Private company limited by shares | Live |
| ONTHELIST Limited | Private company limited by shares | Live |
| OnTheList SEA Limited | | Live |
| OnTheList Asia Limited | Private company limited by shares | Live |
| OnTheList China Limited | Private company limited by shares | Live |
| OnTheList Taiwan Limited | Private company limited by shares | Live |
| ONTHEMAT LIMITED | | Live |
| OnTheSofa Limited | | Live |
| ONTHING LIMITED | Private company limited by shares | Dissolved |
| SAFE ONTI INVESTMENTS LIMITED | Private company limited by shares | Live |
| HK ONTI TRADE LIMITED | | Live |
| ONTIC LIMITED | Private company limited by shares | Live Commenced dormancy on 28-Jun-1994 |
| ONTIDE INVESTMENTS LIMITED | Private company limited by shares | Live |
| ONTIEN INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Ontim Trade Limited | Private company limited by shares | Live |
| ONTIME LIMITED | Private company limited by shares | Dissolved |
| ONTIME LIMITED | Private company limited by shares | Dissolved |
| SUN ON-TIME COMPANY LIMITED | Private company limited by shares | Live |
| NEW ONTIME LIMITED | Private company limited by shares | Live |
| ONTIME ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| ONTIME ENTERPRISES LIMITED | Private company limited by shares | Live |
| ONTIME INC. LIMITED | Private company limited by shares | Live |
| ONTIMX TECHNOLOGY HK LIMITED | | Live |
| ONTIN CAPITAL LIMITED | | Live |
| ONTIX LIMITED | Private company limited by shares | Dissolved |
| ONTLIA LIMITED | Private company limited by shares | Live |
| ONTO ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| ONTO LOGISTIC LIMITED | Private company limited by shares | Live |
| ONTO SUCCESS LIMITED | Private company limited by shares | Dissolved |
| ONTOCAR SERVICE COMPANY LIMITED | Private company limited by shares | Live |
| Ontocaress Company Limited | Private company limited by shares | Live |
| ONTOES LIMITED | Private company limited by shares | Dissolved |
| Ontolo Finance Limited | Private company limited by shares | Live |
| Ontology Research Association Limited | Private company limited by shares | Live |
| OntologyNet Limited | | Live |
| ONTON LIMITED | Private company limited by shares | Dissolved |
| ONTON LIMITED | Private company limited by shares | Live |
| Onton Fintech Investment Limited | | Live |
| ONTON INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| ONTON TEXTILES LIMITED | Private company limited by shares | Dissolved |
| ONTON TRANSPORTATION LIMITED | Private company limited by shares | Dissolved |
| ONTONE LIMITED | Private company limited by shares | Live |
| ONTONE COMPUTER COMPANY LIMITED | Private company limited by shares | Dissolved |
| Ontone Creation Limited | Private company limited by shares | Live |
| ONTONE FINANCE COMPANY LIMITED | Private company limited by shares | Live |
| ONTONOMIA LIMITED | Private company limited by shares | Live |
| Ontoo Technology Limited | | Live |
| ONTOP COMPANY LIMITED | Private company limited by shares | Dissolved |
| ONTOP LIMITED | Private company limited by shares | Dissolved |
| ONTOP LIMITED | Private company limited by shares | Dissolved |
| ONTOP LIMITED | Private company limited by shares | Dissolved |
| ONTOP LIMITED | Private company limited by shares | Live |
| ONTOP 43 LIMITED | | Live |
| ONTOP ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| ONTOP ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| Ontop Finance Limited | Private company limited by shares | Live |
| ONTOP FURNITURE LIMITED | Private company limited by shares | Live |
| ONTOP INC. LIMITED | Private company limited by shares | Dissolved |
| ONTOP PROPERTIES LIMITED | Private company limited by shares | Live |
| Ontopoint Company Limited | Private company limited by shares | Live |
| ONTOR LIMITED | Private company limited by shares | Live |
| Ontour Company Limited | Private company limited by shares | Live |
| Ontour Air Ticketing Co. , Limited | | Live |
| ONTOWN COMPANY LIMITED | Private company limited by shares | Dissolved |
| ONTOZ COMPANY LIMITED | Private company limited by shares | Live |
| ONTRA LIMITED | Private company limited by shares | Dissolved |
| Ontra Limited | Private company limited by shares | Dissolved |
| ONTRACE Limited | Private company limited by shares | Live |
| ONTRADE LIMITED | Private company limited by shares | Dissolved |
| ONTRADE LIMITED | Private company limited by shares | Dissolved |
| ONTRADE LIMITED | Private company limited by shares | Live |
| ON-TRADE BUSINESS LIMITED | Private company limited by shares | Dissolved |
| ONTRADE (CHINA) LIMITED | Private company limited by shares | Dissolved |
| ONTRADE DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |
| ONTRADE PROPERTY & DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |