| Company Name | Type | Status |
|---|---|---|
| PRONOT SONOT LIMITED | Private company limited by shares | Dissolved |
| Sonotap Limited | Private company limited by shares | Live |
| SONOTEC FAR EAST LIMITED | Private company limited by shares | Live |
| SONOTECH Limited | Private company limited by shares | Live |
| SONOTEK INDUSTRIAL LIMITED | Private company limited by shares | Live |
| Sonotel O2 Limited | Private company limited by shares | Live |
| SONOTRI HK LIMITED | Private company limited by shares | Dissolved |
| SONOTRONIC HK LIMITED | Private company limited by shares | Live |