| Atomic Tomb Technology Limited | Private company limited by shares | Live |
| TOMB TRADE LIMITED | Private company limited by shares | Live |
| TOMBAN ENTERPRISES (HK) LIMITED | Private company limited by shares | Live |
| TOMBAUGH ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| De Tombe Trading HK Limited | Private company limited by shares | Live |
| Tombeur Limited | Private company limited by shares | Live |
| TOMBO CO., LIMITED | Private company limited by shares | Live |
| TOMBO ELECTRONIC COMPANY LIMITED | Private company limited by shares | Live |
| Tombo Glass Limited | Private company limited by shares | Live |
| Tombo Technology Group Co., Limited | | Live |
| HK TOMBO HOLDINGS CO., LIMITED | Private company limited by shares | Dissolved |
| TOMBO INDUSTRIES COMPANY LIMITED | Private company limited by shares | Live |
| TOMBO INTERNATIONAL LIMITED | Private company limited by shares | Live |
| Tombo International Limited | Private company limited by shares | Live |
| Tombo Trade Limited | | Live |
| TOMBRO LIMITED | Private company limited by shares | Live |
| TOMBSTONE LIMITED | Private company limited by shares | Dissolved |