| Name | Company Number | Date Appointed | Rating |
|---|
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AKZO NOBEL UK LTD | 00128124 | 31/07/1992 | 30/09/1998 | Gold |
| BIP INDUSTRIES LIMITED | 04134697 | 19/06/2001 | 04/12/2006 | Bronze |
| CORUS ENGINEERING STEELS HOLDINGS LIMITED | 02588085 | 01/08/1991 | 24/07/1992 | Dissolved |
| GKN ENTERPRISE LIMITED | 00984980 | 09/07/1991 | 31/12/1996 | Gold |
| GKN HOLDINGS LIMITED | 00066549 | 24/05/1992 | 05/10/2001 | Gold |
| GKN LIMITED | 04191106 | 19/06/2001 | 20/05/2004 | Silver |
| QINETIQ GROUP PLC | 04586941 | 01/08/2005 | 31/01/2012 | Silver |
| ROH ENDOWMENT FUND (NOMINEES) LIMITED | 04400460 | 21/03/2002 | 20/04/2019 | Not Trading |
| ROH PENSION TRUSTEE LIMITED | 01986347 | 17/04/1998 | 16/02/2006 | Gold |
| ROYAL BALLET SCHOOL | 00547018 | 14/05/2008 | 12/06/2013 | Silver |
| ROYAL OPERA HOUSE COVENT GARDEN FOUNDATION | 00480523 | 25/02/1998 | 31/08/2008 | Gold |
| ROYAL OPERA HOUSE COVENT GARDEN TRADING LIMITED | 04001450 | 31/05/2000 | 18/09/2008 | Dissolved |
| ROYAL OPERA HOUSE ENTERPRISES LIMITED | 04112266 | 24/05/2007 | 31/07/2016 | Bronze |
| TATE & LYLE PUBLIC LIMITED COMPANY | 00076535 | 01/10/1998 | 23/07/2009 | Gold |
| WESTLAND GROUP PLC | 00302632 | 26/04/1995 | 14/11/1996 | Amber |