| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ADVANCED CLINICAL SCIENCES CORPORATION LIMITED | 04391061 | 01/09/2014 | Dissolved |
| PREMIER RESEARCH INTERNATIONAL LIMITED | 02418119 | 01/09/2014 | Dissolved |
| PREMIER RESEARCH TRUSTEES LIMITED | 08290380 | 01/09/2014 | Dissolved |
| PROGRESSIVE ACCELERATION LIMITED | 10755625 | 03/10/2023 | Silver |
| TP3 GLOBAL EUROPE LIMITED | 09145526 | 25/06/2020 | Dissolved |
| TP3 GLOBAL MANUFACTURING LIMITED | 09331259 | 25/06/2020 | Dissolved |
| WALLBROOK HOLDINGS LIMITED | 11483433 | 26/05/2023 | Amber |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| PREMIER RESEARCH GERMANY LIMITED | 05639273 | 01/09/2014 | 31/03/2020 | One Red Flag |
| PREMIER RESEARCH GROUP LIMITED | 04671020 | 01/09/2014 | 31/03/2020 | One Red Flag |
| PREMIER RESEARCH INTERNATIONAL US LIMITED | 06606999 | 01/09/2014 | 31/03/2020 | Silver |
| PRGCO LIMITED | 07413958 | 01/09/2014 | 31/03/2020 | Silver |
| SOFTBOX (BIDCO) LIMITED | 09096186 | 25/06/2020 | 30/06/2022 | Dissolved |
| SOFTBOX (MIDCO) LIMITED | 09096127 | 25/06/2020 | 30/06/2022 | Dissolved |
| SOFTBOX (TOPCO) LIMITED | 09096092 | 14/12/2021 | 30/06/2022 | Dissolved |
| SOFTBOX SYSTEMS (COLDTECH) LIMITED | 11270206 | 25/06/2020 | 30/06/2022 | Dissolved |
| SOFTBOX SYSTEMS (TP3) LIMITED | 11078010 | 25/06/2020 | 30/06/2022 | Amber |
| SOFTBOX SYSTEMS HOLDINGS LIMITED | 08494918 | 25/06/2020 | 30/06/2022 | One Red Flag |
| SOFTBOX SYSTEMS LIMITED | 03112875 | 25/06/2020 | 30/06/2022 | Gold |
| TP3 GLOBAL HOLDINGS LIMITED | 08909241 | 25/06/2020 | 30/06/2022 | Gold |
| TP3 GLOBAL LIMITED | 08145224 | 25/06/2020 | 30/06/2022 | Gold |