| IPR INVESTIGATION LIMITED | Private company limited by shares | Dissolved |
| ONE INVESTIGATION LIMITED | Private company limited by shares | Live |
| TIN YAT INVESTIGATION LIMITED | Private company limited by shares | Live |
| Pi Investigation Limited | Private company limited by shares | Live |
| BUSINESS INVESTIGATION ASIA LIMITED | Private company limited by shares | Live |
| CHINA FAMILY CONSUMPTION INVESTIGATION LIMITED | Private company limited by shares | Dissolved |
| CHINA MARKET INVESTIGATION COMPANY LIMITED | Private company limited by shares | Dissolved |
| Tianchao Business Investigation Co., Limited | Private company limited by shares | Live |
| GEOTECH INVESTIGATION & TESTING LIMITED | Private company limited by shares | Dissolved |
| Tianchao Business Investigation Group Limited | Private company limited by shares | Live |
| HANG TAI INVESTIGATION LIMITED | Private company limited by shares | Live |
| INGCAR INVESTIGATION LIMITED | Private company limited by shares | Dissolved |
| ORIENTAL INVESTMENT INVESTIGATION LIMITED | Private company limited by shares | Live |
| People Investigation Limited | Private company limited by shares | Live |
| YETSON INVESTIGATION LIMITED | Private company limited by shares | Dissolved |
| Claritas Investigations Limited | Private company limited by shares | Live |
| Corporate Research and Investigations Limited | Private company limited by shares | Live |
| PACIFIC OCEAN INVESTIGATIONS LIMITED | Private company limited by shares | Live |