| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| SCOTT PICKFORD E.P.S. LIMITED | 02878625 | 23/02/1994 | Dissolved |
| Scott Pickford Seismic Technology Ltd | 02235962 | 22/10/1997 | Dissolved |
| Stim Lab Coresystems Ltd | SC168618 | 30/07/1998 | Dissolved |
| Stim-Lab (U K) Ltd | SC137952 | 30/07/1998 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ACECA LIMITED | 03672833 | 09/02/2006 | 12/09/2008 | Dissolved |
| ACECA LIMITED | 03672833 | 05/10/2000 | 15/02/2006 | Dissolved |
| CORE LABORATORIES (U.K.) LIMITED | 02924532 | 05/11/1997 | 10/10/2002 | Silver |
| CORETON LIMITED | 01302137 | 30/11/1993 | 10/10/2002 | Not Trading |
| CORETON LIMITED | 01302137 | 29/06/2000 | 18/12/2002 | Not Trading |
| Coherence Technology (U K) Ltd | SC169403 | 20/01/2000 | 10/10/2002 | Dissolved |
| Gaps Geological Consultants Ltd | 01676595 | 18/12/1992 | 10/10/2002 | Dissolved |
| Gaps Geological Consultants Ltd | 01676595 | 29/06/2000 | 18/12/2002 | Dissolved |
| LABTON LIMITED | 02502923 | 15/09/1993 | 10/10/2002 | Not Trading |
| LABTON LIMITED | 02502923 | 06/12/1994 | 22/10/1997 | Not Trading |
| MAGSURVEY LIMITED | 04568744 | 12/07/2006 | 12/09/2008 | Dissolved |
| Samuel Denison Ltd | 02340476 | 31/10/1997 | 19/08/1998 | Dissolved |
| Saybolt Services Ltd | 03321587 | 02/03/2000 | 16/12/2002 | Dissolved |
| W.H. Mayes & Son (U.K.) Ltd | 02869550 | 31/10/1997 | 19/08/1998 | Dissolved |