| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BURGHLEY PRODUCTION LIMITED | 06025240 | 10/11/2008 | Dissolved |
| DEE SALMON FISHERIES COMPANY LIMITED (THE) | SC008656 | 20/06/2017 | Not Trading |
| GRAYFIELD PRODUCTION LIMITED | 06025243 | 16/04/2008 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| 3I PLC | 00397156 | 26/09/2000 | 08/02/2002 | Silver |
| ACTEON GROUP LIMITED | 04231212 | 27/03/2003 | 09/11/2006 | Amber |
| C & M GROUP HOLDINGS LIMITED | SC308575 | 09/11/2006 | 01/02/2007 | Dissolved |
| DISCOVERY INDUSTRIAL SERVICES LIMITED | 01311980 | 10/10/2006 | 21/05/2007 | One Red Flag |
| INGENIOUS FILM PARTNERS 2 LLP | OC314069 | 13/02/2006 | 10/04/2012 | Bronze |
| INGENIOUS FILM PARTNERS LLP | OC308659 | 15/03/2005 | 06/04/2010 | Silver |
| ITHACA MA(NS) LIMITED | SC238015 | 28/01/2003 | 17/09/2003 | Not Trading |
| LIME ROCK MANAGEMENT LLP | SO300122 | 30/07/2002 | 20/02/2012 | Bronze |
| LRM UK ONE LIMITED | SC408293 | 28/09/2011 | 24/04/2014 | Amber |
| LRM UK TWO LIMITED | SC408300 | 28/09/2011 | 24/04/2014 | Amber |
| NEO ENERGY UPSTREAM UK LIMITED | SC279865 | 22/02/2005 | 29/04/2005 | Bronze |
| PRYME GROUP HOLDINGS LIMITED | SC484451 | 18/05/2015 | 17/11/2023 | Bronze |
| PSL ENERGY SERVICES LIMITED | SC243706 | 17/04/2003 | 31/07/2007 | Silver |
| RUBICON OILFIELD INTERNATIONAL UK LTD. | SC241828 | 06/02/2004 | 01/04/2010 | One Red Flag |