| SINKI LIMITED | Private company limited by shares | Live |
| SINKIANG LIMITED | Private company limited by shares | Dissolved |
| SINKING DEVELOPMENT LIMITED | Private company limited by shares | Live |
| SINKING INDUSTRIES LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Sinking International Group Limited | Private company limited by shares | Live |
| SINKING INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| Sinkio Limited | Private company limited by shares | Live |
| SinkiTech Limited | Private company limited by shares | Live |