| ULTRASONIC COMPANY LIMITED | Private company limited by shares | Dissolved |
| ASIA ULTRASONIC LIMITED | Private company limited by shares | Live |
| DICKSON & ULTRASONIC PCB COMPANY LIMITED | Private company limited by shares | Dissolved |
| SANHO ULTRASONIC ENGINEERING LIMITED | Private company limited by shares | Live |
| ULTRASONIC INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| TUNG PO ULTRASONIC TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Live |
| ULTRASONICA LIMITED | Private company limited by shares | Live |
| SJP Ultrasonics Limited | Private company limited by shares | Live |
| Ultrasonics Limited | | Live |
| BRANSON ULTRASONICS (ASIA PACIFIC) CO. LIMITED | Private company limited by shares | Live |
| Cheersonic Ultrasonics Co., Limited | Private company limited by shares | Live |
| ULTRASONICS ENGINEERING CO., LIMITED | Private company limited by shares | Live |
| Pyrocks Ultrasonics Company Limited | | Live |
| PZFlex Ultrasonics Limited | Private company limited by shares | Live |
| RINCO ULTRASONICS (HONG KONG) LIMITED | Private company limited by shares | Live |