| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| British Newspaper Index Ltd | 02551301 | 05/06/2008 | Dissolved |
| Cengage Learning Services (Storage) Ltd | 00911222 | 14/07/2009 | Dissolved |
| Gale Research International | 02380446 | 05/06/2008 | Dissolved |
| Graham & Whiteside | 03031591 | 05/06/2008 | Dissolved |
| Harvester Press Microform Publications Ltd | 01378564 | 05/06/2008 | Dissolved |
| Information Access Uk Ltd | 02721203 | 05/06/2008 | Dissolved |
| Newspaper Archive Developments Ltd | 01517683 | 05/06/2008 | Dissolved |
| Research Publications Ltd | 03031087 | 05/06/2008 | Dissolved |
| SARATOGA LIMITED | 06035849 | 21/12/2006 | Dissolved |
| SPARX LIMITED | 07907042 | 27/01/2021 | Amber |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BLOOMSBURY PUBLISHING PLC | 01984336 | 23/07/2013 | 17/07/2019 | Silver |
| CENGAGE LEARNING (EMEA) LIMITED | 00903535 | 05/06/2008 | 06/07/2012 | Silver |
| CENGAGE LEARNING SERVICES | 00929655 | 30/06/2009 | 06/07/2012 | Dissolved |
| CENGAGE LEARNING UK HOLDINGS LIMITED | 01507017 | 05/06/2008 | 06/07/2012 | Bronze |
| GALE INTERNATIONAL UNLIMITED | 01035200 | 10/06/2003 | 15/06/2006 | Dissolved |
| MCGRAW-HILL EDUCATION (UK) LIMITED | 07989106 | 29/01/2014 | 01/01/2016 | Silver |
| OPEN INTERNATIONAL PUBLISHING LIMITED | 02210774 | 29/01/2014 | 01/01/2016 | Silver |
| THE PUBLISHERS ASSOCIATION LIMITED | 03282879 | 24/01/2014 | 26/11/2015 | Bronze |