| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| THE GENTECH 2 TECHNOLOGY PARTNERSHIP LLP | OC305674 | 25/03/2004 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AFS-COLAS LIGHTING LIMITED | 04014184 | 12/03/2001 | 13/09/2001 | Dissolved |
| ASSOCIATED ENVIRONMENTAL LIMITED | 03324694 | 16/05/2002 | 08/07/2020 | Silver |
| ASSOCIATED HOLDINGS LIMITED | 03286561 | 15/01/2001 | 15/01/2001 | One Red Flag |
| ASSOCIATED HOLDINGS LIMITED | 03286561 | 15/01/2001 | 08/07/2020 | One Red Flag |
| Associated Facilities Holdings Ltd | 03955335 | 15/01/2001 | 13/09/2001 | Dissolved |
| Associated Facilities Services Ltd | 03955333 | 15/01/2001 | 13/09/2001 | Dissolved |
| CHIEFSUM LIMITED | 02195194 | 30/11/1991 | 22/06/1995 | Dissolved |
| CREST NICHOLSON (HENLEY-ON-THAMES) LIMITED | 03828831 | 17/08/2001 | 28/01/2008 | Silver |
| DRINKWATER SABEY C.W.D. LIMITED | 02399050 | 28/06/1991 | 22/06/1995 | Dissolved |
| ECOVERT DLS LIMITED | 02844320 | 18/07/1996 | 17/01/2001 | Dissolved |
| ECOVERT LIMITED | 02308838 | 27/04/2000 | 17/01/2001 | Dissolved |
| Ecovert Services Ltd. | 03202537 | 27/04/2000 | 17/01/2001 | Dissolved |
| Ecovert Wycombe Ltd | 02807487 | 18/07/1996 | 08/12/2000 | Dissolved |
| F. AVANN LIMITED | 01229049 | 11/03/1993 | 22/06/1995 | Dissolved |
| Industrial & Environmental Services Ltd | 02697054 | 27/04/2000 | 17/01/2001 | Dissolved |
| Leco Developments Ltd | 03911406 | 06/03/2000 | 17/01/2001 | Dissolved |
| PRITCHARD INDUSTRIAL SERVICES LIMITED | 00907378 | 30/11/1991 | 22/06/1995 | Dissolved |
| SUEZ UK ENVIRONMENT LTD | 01373225 | 30/11/1991 | 22/06/1995 | Bronze |
| TASKMASTERS CLEANSING SERVICES LIMITED | 00753752 | 30/11/1991 | 22/06/1995 | Dissolved |
| TASKMASTERS HOLDINGS LIMITED | 02258061 | 30/11/1991 | 22/06/1995 | Dissolved |
| THE FOSSE GROUP LIMITED | 02372201 | 27/04/2000 | 17/01/2001 | Dissolved |
| TREHIR DEVELOPMENT COMPANY LIMITED | 02146992 | 13/12/1995 | 17/01/2001 | Dissolved |