| Asia Ontech Advisory Limited | Private company limited by shares | Live |
| ONTECH DIE CASTING COMPANY LIMITED | Private company limited by shares | Dissolved |
| ONTECH CO., LIMITED | Private company limited by shares | Live |
| ONTECH CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| ONTECH CORPORATION LIMITED | Private company limited by shares | Live |
| ONTECH FAR EAST LIMITED | Private company limited by shares | Live |
| ONTECH ELECTRONIC (HK) LIMITED | Private company limited by shares | Dissolved |
| ONTECH ELECTRONICS INTERNATIONAL LIMITED | Private company limited by shares | Live |
| ONTECH PLASTICS ELECTRONICS CO., LIMITED | Private company limited by shares | Live |
| ON-TECH ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| ONTECH EQUIPMENT ENGINEERING LIMITED | Private company limited by shares | Live |
| ONTECH ENTERPRISES LIMITED | Private company limited by shares | Live |
| ONTECH FINANCE LIMITED | Private company limited by shares | Live |
| ON-TECH (GLOBAL) LIMITED | | Live |
| ON-TECH (H.K.) LIMITED | Private company limited by shares | Live |
| HONG KONG ONTECH ELECTRONICS CO., LIMITED | Private company limited by shares | Dissolved |
| ONTECH TECHNOLOGY (HONG KONG) COMPANY LIMITED | Private company limited by shares | Dissolved |
| ONTECH INDUSTRIAL LIMITED | Private company limited by shares | Live |
| ONTECH INTERNATIONAL INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| Ontech Precision Industry (HK) Limited | Private company limited by shares | Live |
| ONTECH INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| ONTECH INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| ONTECH INTERNATIONAL SHIPPING LIMITED | Private company limited by shares | Dissolved |
| 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 |