| Tytoon Company Limited | Private company limited by shares | Live |
| TYTRAX LIMITED | | Live |
| Hong Kong T-Yu Investment Limited | Private company limited by shares | Live |
| TYUAN TRADE LIMITED | | Live |
| TYUET TRADING LIMITED | Private company limited by shares | Live |
| TYUMEN LIMITED | Private company limited by shares | Dissolved |
| TYUMEN LIMITED | Private company limited by shares | Live |
| HONEST TYUSTWORTHY ELECTRIC HONGKONG CO., LIMITED | Private company limited by shares | Live |
| TYVI CAPITAL LIMITED | Public company limited by shares | Dissolved |
| TYVM Limited | | Live |
| Tyway Limited | Private company limited by shares | Live |
| TYWH COMPANY LIMITED | Private company limited by shares | Live |
| TYWIN LIMITED | Private company limited by shares | Dissolved |
| TYWIN ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| WORLDCOM TYWIN (HK) CO., LIMITED | Private company limited by shares | Live |
| TYWIN IMPORT AND EXPORT TRADING LIMITED | Private company limited by shares | Live |
| TYWOOD LIMITED | Private company limited by shares | Dissolved |
| TYWOOD LIMITED | Private company limited by shares | Live |
| TYY01 Limited | | Live |
| TYY02 Limited | | Live |
| TYY03 Limited | | Live |
| TYY04 Limited | | Live |
| TYY05 Limited | | Live |
| TYYF GROUP LIMITED | Private company limited by shares | Live |
| TYYT LIMITED | Private company limited by shares | Live |
| TYZANIC OPTIC CO., LIMITED | Private company limited by shares | Live |