| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| 56 BROMPTON SQUARE (RIGHT TO MANAGE) COMPANY LIMITED | 07128416 | 18/01/2010 | Dissolved |
| 56 BROMPTON SQUARE FREEHOLD LIMITED | 07126841 | 15/01/2010 | Not Trading |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| A Europe Middle East & Africa Ltd | 02571163 | 26/04/1993 | 21/02/1995 | Dissolved |
| A Europe Middle East & Africa Ltd | 02571163 | 26/04/1993 | 01/08/2002 | Dissolved |
| AT&T (UK) | 01774561 | 26/04/1993 | 06/09/1996 | Dissolved |
| AT&T (UK) | 01774561 | 26/04/1993 | 27/10/2003 | Dissolved |
| AT&T GLOBAL MARKETS (EMEA) | 03764804 | 31/05/2000 | 24/10/2003 | Dissolved |
| AT&T GLOBAL SERVICES | 03396030 | 31/01/2000 | 11/09/2003 | Dissolved |
| AT&T ISTEL | 03531467 | 17/08/2001 | 21/11/2002 | Silver |
| INSTITUTE OF LINGUISTS(THE) | 00601928 | 29/07/2009 | 31/12/2010 | Silver |
| INSTITUTE OF LINGUISTS(THE) | 00601928 | 04/03/2006 | 14/03/2009 | Silver |
| IOL EDUCATIONAL TRUST | 04297497 | 02/10/2001 | 30/09/2005 | One Red Flag |
| IOL EDUCATIONAL TRUST | 04297497 | 05/09/2006 | 11/01/2007 | One Red Flag |
| IOL LANGUAGE SERVICES LTD | 03697753 | 30/03/2007 | 24/12/2008 | Dissolved |
| IOL LANGUAGE SERVICES LTD | 03697753 | 25/04/2000 | 31/12/2010 | Dissolved |
| NRPSI 2000 LIMITED | 03906603 | 29/07/2009 | 31/12/2010 | Dissolved |
| NRPSI 2000 LIMITED | 03906603 | 29/07/2004 | 31/12/2010 | Dissolved |