| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| OXYGEN MARKET INTELLIGENCE LIMITED | 07968876 | 28/02/2012 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| HAYMARKET BUSINESS MEDIA LTD. | 01358151 | 01/03/2007 | 25/11/2011 | Dissolved |
| HAYMARKET MEDIA GROUP LTD. | 00267189 | 08/05/2009 | 25/11/2011 | Gold |
| HAYMARKET MEDICAL PUBLICATIONS LTD. | 01472289 | 30/05/2001 | 22/01/2008 | Gold |
| Haymarket Management Publications Ltd | 00801888 | 14/04/1997 | 01/11/2001 | Dissolved |
| ISTRUCTE LTD | 02444141 | 29/09/2014 | 01/11/2018 | Silver |