| TOPUN COMPUTER CO., LIMITED | Private company limited by shares | Dissolved |
| TOPUN INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| TOPUN TECHNOLOGIES CO., LIMITED | Private company limited by shares | Live |
| TOP-UNI LIMITED | Private company limited by shares | Live |
| TOP-UNIFORM COMPANY LIMITED | Private company limited by shares | Live |
| TOP-UNION LIMITED | Private company limited by shares | Dissolved |
| TOPUNIT COMPANY LIMITED | Private company limited by shares | Live |
| TOP-UNUM ELECTRONICS LIMITED | Private company limited by shares | Live |