| SEIC (HK) LIMITED | Private company limited by shares | Dissolved |
| SEICANE ELECTRONICS LIMITED | Private company limited by shares | Live |
| SEICHEUNGTONG PHARMACEUTICAL CO., LIMITED | Private company limited by shares | Live |
| Seicho Limited | Private company limited by shares | Live |
| SEICLE COMPANY LIMITED | Private company limited by shares | Dissolved |
| SeiClini Limited | Private company limited by shares | Live |
| SEICO COMPANY LIMITED | Private company limited by shares | Dissolved |
| SEICON ENTERPRISES (H.K.) LIMITED | Private company limited by shares | Dissolved |
| Seicosy (HK) Trade Co., Limited | Private company limited by shares | Live |
| SEICREDIT SHIPPING LIMITED | Private company limited by shares | Dissolved |
| HONGKONG SEICRONWEI TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |