| TACI LIMITED | Private company limited by shares | Live |
| Taci Nal Limited | | Live |
| Taci Technology Co., Limited | Private company limited by shares | Live |
| TACINO LIMITED | Private company limited by shares | Dissolved |
| TACION TECHNICAL SERVICES COMPANY LIMITED | Private company limited by shares | Dissolved |
| Handler & Tacir Limited | Private company limited by shares | Live |
| TACIT LIMITED | Private company limited by shares | Live |
| Taciti Limited | Private company limited by shares | Live |
| Tacito (HongKong) Limited | Private company limited by shares | Live |
| TACITUS LIMITED | Private company limited by shares | Dissolved |
| HONGKONG TACITUS BIOLOGICAL TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Tacitus Investments Limited | Private company limited by shares | Live |