| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ILLINGWORTH RESEARCH GROUP LIMITED | 03656301 | 17/12/2020 | One Red Flag |
| INC RESEARCH EUROPE HOLDINGS LIMITED | 07386252 | 23/07/2019 | Dissolved |
| INC RESEARCH HOLDING LIMITED | 06910205 | 23/07/2019 | Dissolved |
| KINAPSE LIMITED | 05393844 | 16/06/2021 | Silver |
| SYNEOS HEALTH BA LIMITED | 13084253 | 16/12/2020 | Bronze |
| SYNEOS HEALTH BRANCHES LIMITED | 03900753 | 05/02/2019 | Dissolved |
| SYNEOS HEALTH CLINICAL DEVELOPMENT SERVICES LIMITED | 02211403 | 05/02/2019 | Dissolved |
| SYNEOS HEALTH HOLDINGS UK LIMITED | 10460416 | 23/07/2019 | One Red Flag |
| SYNEOS HEALTH INTERNATIONAL HOLDINGS LIMITED | 02756939 | 23/07/2019 | Amber |
| SYNEOS HEALTH IVH UK LIMITED | 01772610 | 19/12/2017 | Bronze |
| SYNEOS HEALTH UK LIMITED | 04428083 | 07/04/2017 | Silver |
| SYNTERACT HCR LIMITED | 02582852 | 03/02/2021 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| INVENTIV EUROPEAN HOLDINGS LIMITED | 07292575 | 06/08/2019 | 04/03/2021 | One Red Flag |
| SHARPVIEW OPHTHALMOLOGY LIMITED | 09905584 | 23/07/2019 | 28/06/2021 | One Red Flag |
| SYNEOS HEALTH CLINICAL DEVELOPMENT SERVICES LIMITED | 02211403 | 14/06/2010 | 20/09/2010 | Dissolved |
| SYNEOS HEALTH HOLDINGS UK LIMITED | 10460416 | 24/10/2017 | 19/02/2019 | One Red Flag |