| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| D M G I (Bateman Street) Ltd | 01886979 | 31/01/1997 | Dissolved |
| HARMSWORTH COMMUNICATIONS LIMITED | 01926727 | 08/12/1997 | Dissolved |
| HARMSWORTH VETERINARY INFORMATION PUBLISHING LIMITED | 03004383 | 05/01/1995 | Dissolved |
| Harmsworth Information Publishing Ltd | 02985445 | 30/01/1995 | Dissolved |
| Harmsworth Publications Ltd | 00898269 | 25/11/1991 | Dissolved |
| Hobsons Systems Ltd | 03849043 | 13/10/1999 | Dissolved |
| Old R M S Ltd | 03137663 | 06/12/2000 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| A&N MEDIA SERVICES LIMITED | 01210323 | 31/01/1997 | 16/04/2007 | Dissolved |
| Cromwell Road Brighton Investments Ltd | 03533814 | 06/06/2006 | 02/02/2008 | Dissolved |
| DAILY MAIL AND GENERAL INVESTMENTS LIMITED | 02251116 | 01/10/2008 | 31/05/2016 | Bronze |
| DMG INFORMATION LIMITED | 03708142 | 19/09/2011 | 31/05/2016 | Bronze |
| DMGI LAND & PROPERTY EUROPE LTD | 01163844 | 20/11/1992 | 10/05/2010 | Silver |
| EX EDR LTD | 03624832 | 22/06/1999 | 20/03/2008 | Dissolved |
| HARMSWORTH PRINTING LIMITED | 02208579 | 25/09/2008 | 24/09/2009 | Dissolved |
| LANDMARK INFORMATION GROUP LIMITED | 02892803 | 30/09/1998 | 10/05/2010 | Gold |
| PRODAT SYSTEMS PLC | 02849560 | 22/06/1999 | 10/05/2010 | Dissolved |
| PROPERTY & PORTFOLIO RESEARCH LIMITED | 03847408 | 13/10/1999 | 09/06/2006 | Dissolved |
| RMSI LIMITED | 04658340 | 14/02/2003 | 30/04/2009 | Silver |
| STUDY GROUP UK LIMITED | 03108030 | 15/08/1996 | 08/09/2006 | Gold |