| Name | Company Number | Date Appointed | Rating |
|---|
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AMERICAN SCHOOL IN LONDON EDUCATIONAL TRUST LIMITED(THE) | 00784923 | 21/03/2007 | 30/06/2013 | Silver |
| SAFETY-KLEEN EUROPE LIMITED | 03686221 | 05/06/2000 | 18/01/2001 | Bronze |
| SAFETY-KLEEN EUROPE LIMITED | 03686221 | 17/12/1998 | 21/04/2005 | Bronze |
| SAFETY-KLEEN U.K. LIMITED | 01190039 | 26/05/2000 | 18/01/2001 | Bronze |
| SAFETY-KLEEN U.K. LIMITED | 01190039 | 12/07/1996 | 21/04/2005 | Bronze |
| SAFETY-KLEEN UK (EUROPE) LIMITED | 03673963 | 26/05/2000 | 18/01/2001 | Gold |
| SAFETY-KLEEN UK (EUROPE) LIMITED | 03673963 | 17/12/1998 | 21/04/2005 | Gold |
| SAFETY-KLEEN UK (FRANCE) LIMITED | 03673966 | 26/05/2000 | 18/01/2001 | Gold |
| SAFETY-KLEEN UK (FRANCE) LIMITED | 03673966 | 17/12/1998 | 21/04/2005 | Gold |
| Safety Micron Systems U.K. Ltd | 01782348 | 30/11/1998 | 21/04/2005 | Dissolved |
| THE AMERICAN SCHOOL IN LONDON FOUNDATION (UK) LIMITED | 04131404 | 14/05/2008 | 17/01/2011 | Bronze |
| WP SAFETY-KLEEN (CAYMAN) LIMITED | FC028602 | 16/08/2011 | 02/04/2015 | Bronze |
| WP SAFETY-KLEEN LIMITED | 06544225 | 28/08/2008 | 01/05/2009 | Silver |
| WP SK FRANCE LIMITED | 05134646 | 08/07/2004 | 21/04/2005 | Amber |
| WP SK HOLDINGS LIMITED | 05134411 | 08/07/2004 | 02/07/2008 | Gold |
| WP SK LIMITED | 05134639 | 08/07/2004 | 21/04/2005 | Gold |