| SMARTO COMPANY LIMITED | Private company limited by shares | Dissolved |
| SMARTO LIMITED | | Live |
| SMARTO ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| SMARTO INDUSTRIAL COMPANY LIMITED | Private company limited by shares | Live |
| SMARTO INTERNATIONAL LIMITED | Private company limited by shares | Live |
| SMARTO DRAGON INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| SMARTO INTERNATIONAL TRADING CO., LIMITED | Private company limited by shares | Live |
| SMARTO INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SMARTO TECHNOLOGY LIMITED | Private company limited by shares | Live |
| SMARTOBJECT NETWORK LIMITED | Private company limited by shares | Live |
| SMARTOLINK CO LIMITED | Private company limited by shares | Live |
| SMARTOM (HK) TECHNOLOGY LIMITED | Private company limited by shares | Live |
| SMARTON LIMITED | Private company limited by shares | Dissolved |
| SMARTON LIMITED | Private company limited by shares | Live |
| SMARTON WAY LIMITED | Private company limited by shares | Dissolved |
| SMARTON INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| SMARTON PROPERTIES LIMITED | Private company limited by shares | Dissolved |
| SMARTON RESOURCES LIMITED | Private company limited by shares | Dissolved |
| SMARTON SOLUTIONS LIMITED | Private company limited by shares | Live |
| SMARTON TRADING LIMITED | Private company limited by shares | Live |
| Smartona Limited | Private company limited by shares | Dissolved |
| SMARTONE 3G LIMITED | Private company limited by shares | Live |
| SMARTONE COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| SMART-ONE ELECTRONICS (HK) LIMITED | | Live |
| SMARTONE CHARITABLE FUND LIMITED | Company limited by guarantee | Live |
| SMARTONE (HK) LIMITED | Private company limited by shares | Dissolved |
| SMARTONE (HK) CO. LIMITED | Private company limited by shares | Live |
| SMARTONE INDUSTRIAL (HK) LIMITED | Private company limited by shares | Live |
| SMARTONE INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SMARTONE INVESTMENT MANAGEMENT CO., LIMITED | Private company limited by shares | Dissolved |
| SMARTONE PUBLISHING LIMITED | Private company limited by shares | Live |
| SMARTONE TELECOMMUNICATIONS LIMITED | Private company limited by shares | Live |
| SMARTONE TRADING LIMITED | Private company limited by shares | Live |
| SMARTONER TECHNOLOGY HONG KONG LIMITED | Private company limited by shares | Dissolved |
| SMARTONER INDUSTRIAL LIMITED | Private company limited by shares | Dissolved |
| SMARTONIC LIMITED | Private company limited by shares | Live |
| SMARTOP LIMITED | Private company limited by shares | Dissolved |
| SMARTOP LIMITED | Private company limited by shares | Dissolved |
| NEW SMARTOP LIMITED | Private company limited by shares | Dissolved |
| SMARTOP LIMITED | Private company limited by shares | Live |
| SMARTOP BUSINESS LIMITED | Private company limited by shares | Live |
| SMARTOP ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| SMARTOP INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SMARTOP PROPERTIES LIMITED | Private company limited by shares | Live |
| SMARTOPTION LIMITED | Private company limited by shares | Live |
| SMARTOR LIMITED | Private company limited by shares | Live |
| SmartOrder Limited | Private company limited by shares | Live |
| SmartOrder Technology Limited | Private company limited by shares | Live |
| SMARTOSS HARDWARE MANUFACTURER CO., LIMITED | Private company limited by shares | Live |
| Hong Kong Smartou Technology Co., Limited | | Live |
| SmarTouch Group Company Limited | Private company limited by shares | Live |
| SMARTOWN LIMITED | Private company limited by shares | Dissolved |
| SMARTOWN COMMUNICATION LIMITED | Private company limited by shares | Live |
| SMARTOY COMPANY LIMITED | Private company limited by shares | Live |