| THREE'S COMPANY LIMITED | Private company limited by shares | Dissolved |
| THREE'S ARCHITECTS LIMITED | Private company limited by shares | Live |
| THREE'S ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| Threesep Limited | Private company limited by shares | Live |
| ThreeSides Limited | Private company limited by shares | Live |
| Threesis Limited | Private company limited by shares | Live |
| Threesome Limited | Private company limited by shares | Live |
| Threesome Technology Co, Limited | | Live |
| Threesome-thing Company Limited | Private company limited by shares | Live |
| HONG KONG THREE-STAR ELECTRON INDUSTRY LIMITED | Private company limited by shares | Dissolved |