| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| HAYMARKET GROUP PROPERTIES LIMITED | 01469098 | 19/12/2014 | Dissolved |
| Masterprize | 03260240 | 28/01/2002 | Dissolved |
| PROFESSIONAL PUBLISHERS ASSOCIATION LTD | 00132310 | 25/06/2009 | Bronze |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CARAVAN SITEFINDER UK LTD. | SC215216 | 09/03/2007 | 01/10/2008 | Dissolved |
| FRONTLINE LIMITED | 00329613 | 01/12/2003 | 28/10/2021 | Bronze |
| GRAMOPHONE PUBLICATIONS LIMITED | 00319998 | 07/07/1999 | 13/08/1999 | Dissolved |
| HAYMARKET BUSINESS MEDIA LTD. | 01358151 | 10/12/2009 | 24/06/2015 | Dissolved |
| HAYMARKET CONSUMER MEDIA LTD. | 01539034 | 01/09/1999 | 24/06/2015 | Not Trading |
| HAYMARKET EXHIBITIONS LIMITED | 02457048 | 04/01/2011 | 01/12/2014 | Dissolved |
| HAYMARKET NETWORK LIMITED | 00834207 | 06/11/2000 | 01/12/2014 | Dissolved |
| HAYMARKET WORLDWIDE LIMITED | 00855308 | 17/10/2001 | 01/03/2007 | Not Trading |
| Haymarket Autosport & Classic Publications Ltd | 00979380 | 09/06/2000 | 01/10/2007 | Dissolved |
| Haymarket Consumer Publications Ltd | 01020739 | 09/06/2000 | 01/10/2007 | Dissolved |
| Haymarket Interactive Ltd | 01911243 | 14/06/2001 | 16/09/2004 | Dissolved |
| Haymarket Motoring Publications Ltd | 00215720 | 15/12/2000 | 01/10/2007 | Dissolved |
| Haymarket Specialist Publications Ltd | 00111341 | 15/12/2000 | 01/10/2007 | Dissolved |
| PETROLHEADS LIMITED | 03758279 | 03/01/2007 | 01/10/2008 | Dissolved |
| RIVER STREET EVENTS LIMITED | 02708675 | 02/01/2010 | 12/08/2013 | One Red Flag |
| THINK TRAVEL MEDIA LIMITED | 02811057 | 31/10/2008 | 08/07/2013 | Amber |