| Company Name | Type | Status |
|---|---|---|
| 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 |