| btob Limited | Private company limited by shares | Live |
| BTOB SOLUTIONS LIMITED | Private company limited by shares | Live |
| BTOBSTEAM LIMITED | | Live |
| BtoE Limited | Private company limited by shares | Dissolved |
| Btokit Co., Limited | Private company limited by shares | Live |
| B&TOM COMPANY LIMITED | Private company limited by shares | Dissolved |
| BTON GROUP LIMITED | Private company limited by shares | Live |
| HK BTONG TRADE LIMITED | | Live |
| BT-ONL LIMITED | Private company limited by shares | Live |
| B-TOP LIMITED | Private company limited by shares | Live |
| Btows Co., Limited | Private company limited by shares | Live |