| Name | Company Number | Date Appointed | Rating |
|---|
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ASSESSMENTS TOPCO LIMITED | 07964285 | 02/04/2012 | 08/06/2016 | Silver |
| BOOK AID INTERNATIONAL | 00880754 | 25/04/2002 | 27/03/2014 | Gold |
| CHAMBERS PUBLISHING LIMITED | SC002048 | 01/06/2006 | 03/12/2009 | Dissolved |
| ENCYCLOPAEDIA BRITANNICA (UK) LIMITED | 03830890 | 01/10/2011 | 31/01/2015 | Amber |
| HACHETTE UK (HOLDINGS) LIMITED | 03701589 | 16/03/2005 | 13/06/2007 | Gold |
| HACHETTE UK LIMITED | 02020173 | 01/01/1998 | 03/12/2009 | Gold |
| HARK LONDON LIMITED | 02983471 | 01/01/2018 | 30/09/2019 | Amber |
| HODDER & STOUGHTON LIMITED | 00651692 | 24/05/2006 | 03/12/2009 | Bronze |
| IMPERO HOLDINGS LIMITED | 08807382 | 21/09/2017 | 06/06/2024 | One Red Flag |
| IMPERO TRUSTEE LIMITED | 09820078 | 18/07/2022 | 10/06/2024 | Gold |
| JOHN MURRAY (PUBLISHERS) LIMITED | 00492627 | 10/05/2002 | 03/12/2009 | Dissolved |
| NELSONCROOM LIMITED | 03924989 | 14/07/2010 | 31/01/2018 | Gold |
| PHILIP ALLAN PUBLISHERS LIMITED | 01086222 | 06/03/2006 | 13/06/2007 | Dissolved |
| PUBLISHERS' LICENSING SERVICES LIMITED | 01575236 | 14/11/2005 | 31/12/2011 | Silver |
| RISING STARS UK LIMITED | 04246700 | 04/08/2009 | 31/12/2014 | Dissolved |
| ROBERT GIBSON & SONS GLASGOW, LIMITED | SC005175 | 30/08/2002 | 13/06/2007 | Dissolved |
| SCOTTISH BOOK SOURCE LIMITED | SC159052 | 09/02/2011 | 17/08/2017 | Bronze |