| SEIGAKUDO LIMITED | Private company limited by shares | Live |
| Seige Communication Limited | Private company limited by shares | Live |
| SEIGEER LIMITED | | Live |
| DE SEIGNALT LIMITED | Private company limited by shares | Live |
| SEIGNIOR LIMITED | Private company limited by shares | Dissolved |
| SEIGNIOR (HK) DEVELOPMENT COMPANY LIMITED | Private company limited by shares | Dissolved |
| SEIGNIOR INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| Seigniorage Capital Limited | Private company limited by shares | Live |
| SEIGNIORY INTERNATIONAL (GROUP) CO., LIMITED | Private company limited by shares | Dissolved |
| Seigo Engineering Company Limited | Private company limited by shares | Live |