| Company Name | Type | Status |
|---|---|---|
| ITESE TECHNOLOGY (HK) CO., LIMITED | Private company limited by shares | Live |
| Itest Limited | Live | |
| HONGKONG ITEST TECHNOLOGY TRADE CO., LIMITED | Private company limited by shares | Live |
| HONGKONG ITEST TELECOMMUNICATION TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| ITEST TECHNOLOGIES CO., LIMITED | Private company limited by shares | Live |
| ITEST TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| ITESTMEASURE COMPANY LIMITED | Private company limited by shares | Live |