| ULTRO COMPANY LIMITED | Private company limited by shares | Dissolved |
| Ultron Limited | Private company limited by shares | Live |
| Ultron HK Company Limited | Private company limited by shares | Live |
| Ultron Transaction Advisory Services Limited | | Live |
| ULTRON ASIA LIMITED | Private company limited by shares | Live |
| Ultron Circuits Limited | Private company limited by shares | Live |
| Ultron InT Design & Build Co., Limited | Private company limited by shares | Live |
| ULTRON TRADING CO., LIMITED | Private company limited by shares | Live |
| Ultron Construction Co. Limited | Private company limited by shares | Live |
| Ultron Development Limited | Private company limited by shares | Live |
| Ultron Fly Development Limited | Private company limited by shares | Live |
| Ultron Global Development Limited | Private company limited by shares | Live |
| Ultron Digital Company Limited | Private company limited by shares | Live |
| Ultron Electronics Co., Limited | Private company limited by shares | Live |
| ULTRON DESIGN ENGINEERING LIMITED | Private company limited by shares | Live |
| Ultron Group Limited | Private company limited by shares | Live |
| ULTRON ELECTRONICS CO. (H.K.) LIMITED | Private company limited by shares | Live Commenced dormancy on 02-Jan-2007 |
| HONGKONG ULTRON ENGINEERING MACHINERY CO., LIMITED | | Live |
| ULTRON INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| Ultron Moto Industry Co., Limited | Private company limited by shares | Live |
| Ultron Information Technology Co., Limited | Private company limited by shares | Live |
| ultron International Limited | Private company limited by shares | Live |
| New ultron International Co., Limited | | Live |
| Ultron International Commercial and Trade Co., Limited | Private company limited by shares | Live |
| ULTRON INTERNATIONAL (HONG KONG) TECHNOLOGY LIMITED | Private company limited by shares | Live |
| ULTRON INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Live |
| ULTRON INTERNATIONAL MEDIA LIMITED | Private company limited by shares | Live |
| Ultron International Trade Limited | | Live |
| ULTRON INTERNATIONAL TRADING CO. LIMITED | | Live |
| Ultron Investment Limited | Private company limited by shares | Live |
| Ultron Investment Consultancy Limited | Private company limited by shares | Live |
| Ultron Management Limited | Private company limited by shares | Live |
| ULTRON Management Limited | Private company limited by shares | Live |
| Ultron Motive Company Limited | | Live |
| ULTRON PACKAGING CO., LIMITED | Private company limited by shares | Live |
| ULTRON (CHINA) PROPERTY LIMITED | Private company limited by shares | Live |
| QUAD ULTRON LIMITED | Private company limited by shares | Live |
| Ultron Service Company Limited | Private company limited by shares | Live |
| Ultron Secretarial Services Limited | Private company limited by shares | Live |
| Ultron Research Standards Co., Limited | | Live |
| Ultron Technology Company Limited | Private company limited by shares | Live |
| ULTRON DIGITAL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| ULTRON ENTERTAINMENT TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Ultron Intelligent Technology (Hong Kong) Limited | | Live |
| ULTRON TELECOM COMPANY LIMITED | Private company limited by shares | Dissolved |
| ULTRON UNION MEDIA CO., LIMITED | Private company limited by shares | Live |
| ULTRONIC COMPANY LIMITED | Private company limited by shares | Live |
| ULTRONICS ENTERPRISE LIMITED | Private company limited by shares | Live |
| ULTROTEK (UK) LIMITED | | Live |