| SINFON TECHNOLOGY (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| SINFON INTERNATIONAL TRADING CO., LIMITED | Private company limited by shares | Live |
| Sinfonia Limited | Private company limited by shares | Live |
| SINFONIA ASIA LIMITED | Private company limited by shares | Dissolved |
| HONG KONG SINFONIETTA LIMITED | Company limited by guarantee | Live |
| Sinfonietta Technology (HK) Limited | Private company limited by shares | Dissolved |
| SINFORD LIMITED | Private company limited by shares | Dissolved |
| SINFORD LIMITED | Private company limited by shares | Live |
| SINFORD ENTERPRISES LIMITED | Private company limited by shares | Live |
| SINFORD INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| SINFORD INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| SINFORD MANAGEMENT LIMITED | Private company limited by shares | Live |
| SINFORT ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| SINFORT ENTERPRISE COMPANY LIMITED | Private company limited by shares | Dissolved |
| SINFORT TRANSPORT LIMITED | Private company limited by shares | Dissolved |