| SUMYAT LIMITED | Private company limited by shares | Live |
| SUMYEE FOODS LIMITED | Private company limited by shares | Live |
| HK SUMYEE TRADING LIMITED | Private company limited by shares | Live |
| SUMYI (LAMTIN) COMPANY LIMITED | Private company limited by shares | Live |
| SUMYIELD COMPANY LIMITED | Private company limited by shares | Dissolved |
| SumYin Limited | Private company limited by shares | Live |
| SUMYING TRADE CO., LIMITED | Private company limited by shares | Live |
| Sumyiptea Limited | | Live |
| SUMYI.YL Company Limited | Private company limited by shares | Live |
| Sumyth Trading Company Limited | | Live |
| SUMYUN TRADING CO., LIMITED | Private company limited by shares | Live |