| Company Name | Type | Status |
|---|---|---|
| Speed Vast (YTT) Limited | Live | |
| Ytterby Creative Technology (China) Co., Limited | Private company limited by shares | Live |
| YTTRIUM KNOWLEDGE LIMITED | Private company limited by shares | Dissolved |
| YTTse Engineering Co., Limited | Live | |
| YTTSEMI SMART (HONG KONG) LIMITED | Live |