| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| MARCHMOUNT EXECUTIVE SERVICES LTD | 09715746 | 03/08/2015 | One Red Flag |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CAWOOD SCIENTIFIC LIMITED | 05655711 | 06/03/2006 | 31/12/2009 | Amber |
| CENTRE FOR POLICY STUDIES LIMITED | 01174651 | 28/06/1992 | 01/03/1993 | Bronze |
| Conservatives for Change Ltd | 04268239 | 02/11/2001 | 16/08/2006 | Dissolved |
| GENOME RESEARCH LIMITED | 02742969 | 06/11/2017 | 31/12/2019 | Silver |
| INNVOTEC CORPORATE VENTURES LIMITED | 02063651 | 23/02/1992 | 01/11/1994 | Not Trading |
| INSTITUTE FOR GOVERNMENT | 06480524 | 01/02/2009 | 08/12/2011 | Gold |
| KONIGSWINTER | 04626711 | 20/05/2005 | 20/12/2010 | Silver |
| NATIONAL CENTRE FOR UNIVERSITIES AND BUSINESS | 03465914 | 01/06/2015 | 15/03/2018 | Gold |
| POLICY EXCHANGE LIMITED | 04297905 | 02/11/2001 | 12/06/2002 | Silver |
| PROJECT BLUESKY INVESTMENTS LIMITED | 04185729 | 08/11/2003 | 24/07/2008 | Dissolved |
| RETIREMENT SECURITY (MILTON KEYNES) LIMITED | 02160268 | 06/12/1991 | 20/07/1994 | Silver |
| RETIREMENT SECURITY (READING) LIMITED | 02324219 | 31/10/1992 | 20/07/1994 | Bronze |
| RETIREMENT SECURITY LIMITED | 01612921 | 28/12/1991 | 20/07/1994 | Gold |
| SURREY SATELLITE TECHNOLOGY LIMITED | 01916260 | 01/09/2015 | 22/07/2022 | Amber |
| THE CENTRE FOR SOCIAL JUSTICE | 05137036 | 17/03/2006 | 12/09/2008 | Gold |
| THE FRANCIS CRICK INSTITUTE LIMITED | 06885462 | 18/12/2015 | 13/12/2018 | Silver |
| THE SOCIAL MARKET FOUNDATION | 02537035 | 31/08/1992 | 03/03/1994 | Gold |
| VANTIX LTD. | 02852569 | 30/12/2007 | 31/12/2009 | Dissolved |