| SUMS LIMITED | Private company limited by shares | Live |
| Sum's Dumpling Limited | Private company limited by shares | Live |
| LADY SUM'S EDUCATION FOUNDATION LIMITED | Company limited by guarantee | Live |
| SUM'S FAMILY LIMITED | Private company limited by shares | Live |
| SUM'S FRIEND ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| SUMS MACHINERY LIMITED | Private company limited by shares | Live |
| Squared Sums Limited | Private company limited by shares | Live |
| SUMSAM INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| SUMSAVA TRADING LIMITED | Private company limited by shares | Dissolved |
| Sumscope Limited | Private company limited by shares | Live |
| Sumscope (Asia) Limited | Private company limited by shares | Live |
| SUMSHA LIMITED | Private company limited by shares | Live |
| SUMSHINE HOLDING LIMITED | Private company limited by shares | Live |
| AGIETEC SUMSHINE MANUFACTURING COMPANY LIMITED | Private company limited by shares | Live |
| Sumshow Limited | Private company limited by shares | Live |
| Sumsoar Supply Chain Co., Limited | Private company limited by shares | Live |
| Sumsource Limited | | Live |
| SUMSTRONG LIMITED | Private company limited by shares | Dissolved |
| SUMSTRONG INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| SUMSUI TECHNOLOGY (HK) LIMITED | Private company limited by shares | Live |
| SUMSUN LIMITED | Private company limited by shares | Dissolved |