| Company Name | Type | Status |
|---|---|---|
| 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 |