| ONGO CO. LIMITED | Private company limited by shares | Live |
| ONGO CARGO CO., LIMITED | Private company limited by shares | Live |
| ONGO TRANSPORTATION LIMITED | Private company limited by shares | Dissolved |
| Ongoal Technology HK Co., Limited | | Live |
| HONG KONG ONGOAL INTERNATIONAL INFORMATION PUBLISH LIMITED | Private company limited by shares | Dissolved |
| Ongoin Tech Limited | Private company limited by shares | Live Commenced dormancy on 21-Jun-2018 |
| ONGOING LIMITED | Private company limited by shares | Dissolved |
| ONGOING LIMITED | Private company limited by shares | Live |
| Ongoing Go Limited | Private company limited by shares | Live |
| MAN ONGOING LIMITED | | Live |
| JET ONGOING LIMITED | | Live |
| ONGOING ADVERTISING LIMITED | Private company limited by shares | Live |
| ONGOING ENTERPRISE LIMITED | Private company limited by shares | Live |
| Ongoing Holding Company Limited | | Live |
| ONGOING INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| MEGA ONGOING LIMITED | Private company limited by shares | Live |
| ONGOING SURPLUS LIMITED | Private company limited by shares | Dissolved |
| ONGOLD COMPANY LIMITED | Private company limited by shares | Dissolved |
| ONGOLE COMPANY LIMITED | Private company limited by shares | Dissolved |
| ONGOLF HONG KONG LIMITED | Private company limited by shares | Live |
| ONGOLINK LIMITED | Private company limited by shares | Live |
| ONGONE LIMITED | Private company limited by shares | Dissolved |
| ONGOOD LIMITED | Private company limited by shares | Live |
| ONGOOD INC LIMITED | Private company limited by shares | Dissolved |
| EVER ONGOOD LIMITED | Private company limited by shares | Live |
| GLOBAL ONGOOD LIMITED | Private company limited by shares | Live |
| ONGOOD INDUSTRIAL LIMITED | Private company limited by shares | Live |
| ONGOOD PROMOTION LIMITED | Private company limited by shares | Dissolved |
| ONGOOD TRADING LIMITED | Private company limited by shares | Dissolved |