| TONA CO., LIMITED | Private company limited by shares | Live |
| LA TONA CONSULTING LIMITED | Private company limited by shares | Live |
| ANISON TONA CONSULTING LIMITED | Private company limited by shares | Live |
| TONA Management Consulting Limited | Private company limited by shares | Dissolved |
| TONA Group Limited | Private company limited by shares | Live |
| TONA (HONGKONG) SANITARY WARE CO., LIMITED | Private company limited by shares | Dissolved |
| TONA INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| TONA International Co., Limited | Private company limited by shares | Live |
| TONA INTERNATIONAL CARGO FORWARDING LIMITED | Private company limited by shares | Dissolved |
| TONA INTERNATIONAL SHIP SERVICE CO., LIMITED | Private company limited by shares | Live |
| TONA (ITALY) SANITARY WARE CO., LIMITED | Private company limited by shares | Dissolved |
| TONA QUALITY SUPPLIES COMPANY LIMITED | Private company limited by shares | Dissolved |
| Tonac Technology (Hong Kong) Limited | Private company limited by shares | Live |
| TONAGE AIR-CONDITION & ELECTRICAL ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| TONAGE ENGINEERING CO. LIMITED | Private company limited by shares | Dissolved |
| GRAND TONAHL LIMITED | | Live |
| TONAIR ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| TONAK (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| TONAKA LIMITED | Private company limited by shares | Dissolved |
| TONALD INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| TONANMAR ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| TONART COMPANY LIMITED | Private company limited by shares | Dissolved |
| H. TONART V. B. CO. LIMITED | Private company limited by shares | Dissolved |
| TONART ENTERPRISE LIMITED | Private company limited by shares | Dissolved |
| TONART INTERNATIONAL INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| Tonasa Technology Limited | Private company limited by shares | Live |
| TONATURE (HONG KONG) LIMITED | Private company limited by shares | Live |
| TONAWATER DEVELOPMENT LIMITED | Private company limited by shares | Live |
| TONAWATER FINANCE LIMITED | Private company limited by shares | Live |
| TONAWATER PROPERTY AGENCY LIMITED | Private company limited by shares | Live |