| SIU'S P & M LIMITED | Private company limited by shares | Dissolved |
| SIU'S LIMITED | Private company limited by shares | Dissolved |
| SIU'S BROTHER INVESTMENT LIMITED | Private company limited by shares | Live |
| SIU'S BROTHERS LIMITED | Private company limited by shares | Dissolved |
| SIU'S GEM CORPORATION LIMITED | Private company limited by shares | Live |
| SIU'S ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| SIU'S ESTATE LIMITED | Private company limited by shares | Dissolved |
| SIU'S GARMENTS MANUFACTURING COMPANY LIMITED | Private company limited by shares | Dissolved |
| SIU'S GENERATION INVESTMENT LIMITED | Private company limited by shares | Live |
| SIUS GLOBAL LIMITED | Private company limited by shares | Dissolved |
| SIU'S (HON KEUNG) COMPANY LIMITED | Private company limited by shares | Dissolved |
| SIU'S INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| SIU'S INTERNATIONAL ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| SIU'S KING YIP PLASTICS LEATHER CO. LIMITED | Private company limited by shares | Dissolved |
| SIU'S MOTO LIMITED | | Live |
| SIU'S WATCH MANUFACTURER LIMITED | Private company limited by shares | Dissolved |
| Siusai Technology (HK) Co., Limited | Private company limited by shares | Live |
| SIUSHUNFA INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| Siusiu Limited | | Live |
| Siusiu's Kitchen Company Limited | | Live |
| SIUSONG COMPANY LIMITED | Private company limited by shares | Live |