| ICTC Limited | Private company limited by shares | Live |
| ICTC ASIA LIMITED | Private company limited by shares | Dissolved |
| ICTC PVT. LIMITED | Private company limited by shares | Dissolved |
| ICTG LIMITED | Private company limited by shares | Live |
| ICTH MANAGE ASSOCIATION LIMITED | | Live |
| PENTE ARTOUS DUO ICTHUAS LIMITED | Private company limited by shares | Live |
| ICTI CARE Asia Limited | Private company limited by shares | Dissolved |
| ICTI CARE FOUNDATION ASIA LIMITED | Company limited by guarantee | Live |
| ICTION (HONG KONG) INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| ICTION (HONG KONG) TECHNOLOGY LIMITED | Private company limited by shares | Live |
| I.CTION (HONGKONG) INVESTMENT CO., LIMITED | Private company limited by shares | Dissolved |
| ICTjob Asia Limited | Private company limited by shares | Live |
| ICTK LIMITED | Private company limited by shares | Live |
| ICT-LANTO LIMITED | Private company limited by shares | Live |
| ICTO LIMITED | Private company limited by shares | Dissolved |
| ICTP LIMITED | Private company limited by shares | Live |
| ICTR ASIA LIMITED | Private company limited by shares | Live |
| IC-TRADE.COM LIMITED | Private company limited by shares | Live |
| ICTRUE LIMITED | Private company limited by shares | Live |
| ICTS Company Limited | Private company limited by shares | Dissolved |
| ICTS Asia Limited | Private company limited by shares | Live |
| ICTSI (Hong Kong) Limited | Private company limited by shares | Live |
| ICTS-INTERNATIONAL CONSULTANTS ON TARGETED SECURITY (HK) LIMITED | Private company limited by shares | Dissolved |
| SIR ROBERT BLACK COLLEGE OF EDUCATION STUDENTS' UNION (I.C.T.T.) ALUMNI ASSOCIATION LIMITED | Company limited by guarantee | Dissolved |