| JK IT&T CO., LIMITED | Private company limited by shares | Live |
| Lagom Kaffe (ITT) Limited | | Live |
| Postcollectionhk (itt) Limited | Private company limited by shares | Live |
| IT&T Production Limited | Private company limited by shares | Live |
| TRILLION IT&T CONSULTANCY LIMITED | Private company limited by shares | Dissolved |
| iTTa Capital Limited | Private company limited by shares | Dissolved |
| ITTAK COMIC & TECH CO., LIMITED | | Live |
| ITTALA LIMITED | Private company limited by shares | Dissolved |
| ITTC LIMITED | Private company limited by shares | Dissolved |
| IT-TECH SOLUTIONS LIMITED | Private company limited by shares | Live |
| ITTEL LIMITED | Private company limited by shares | Live |
| Ittelos Limited | Private company limited by shares | Live |
| ITTEN TRADING LIMITED | Private company limited by shares | Live |
| Ittenkai Limited | Private company limited by shares | Live |
| ITTI COMPANY LIMITED | Private company limited by shares | Live |
| ITTINO FURNITURE CO., LIMITED | Private company limited by shares | Live |
| ITTIZ LIMITED | Private company limited by shares | Live |
| OOMS, ITTNER ASIA LIMITED | Private company limited by shares | Dissolved |
| Itto Gyu Limited | Private company limited by shares | Live |
| ITTO Gallery Limited | | Live |
| Menya Itto Limited | Private company limited by shares | Live |
| Tonkotsu Itto Limited | Private company limited by shares | Live |
| Ittori Limited | Private company limited by shares | Live |
| ITT'S LIMITED | Private company limited by shares | Live |
| ittwwc Limited | Private company limited by shares | Live |
| ITTY HK LIMITED | Private company limited by shares | Live |
| ITTZO GROUP FRANCE LIMITED | Private company limited by shares | Live |