| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| The Abbeyfield Cambridge Society Ltd | 00701224 | 16/07/2004 | Dissolved |
| The Ombudsman for Corporate Estate Agents Company Limited | 02524410 | 20/07/1992 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ADDENBROOKE'S KIDNEY PATIENTS ASSOCIATION LIMITED | 01393034 | 02/01/2014 | 23/04/2018 | Gold |
| B & B Financial Services Ltd | 01571026 | 29/10/1991 | 31/12/1991 | Dissolved |
| B B G New Homes Ltd | 01975801 | 29/10/1991 | 31/12/1991 | Dissolved |
| Baker & Collinson | 02078564 | 29/10/1991 | 31/12/1991 | Dissolved |
| Bradford & Bingley Dormant 3 | 01420898 | 29/10/1991 | 31/12/1991 | Dissolved |
| Bradford & Bingley Dormant 5 Ltd | 01625505 | 29/10/1991 | 31/12/1991 | Dissolved |
| Bradford & Bingley Dormant 9 | 01650939 | 29/10/1991 | 31/12/1991 | Dissolved |
| Buckell & Ballard | 01625503 | 29/10/1991 | 31/12/1991 | Dissolved |
| Burlings | 01966987 | 29/10/1991 | 31/12/1991 | Dissolved |
| Chailey Financial Services Ltd | 01917506 | 19/10/1991 | 31/12/1991 | Dissolved |
| Cooke & Arkwright Agricultural Ltd | 02146793 | 19/10/1991 | 31/12/1991 | Dissolved |
| Cooke & Arkwright Building Services Ltd | 02097630 | 19/10/1991 | 31/12/1991 | Dissolved |
| Cooke & Arkwright Commercial Ltd | 02146834 | 19/10/1991 | 31/12/1991 | Dissolved |
| Cooke & Arkwright Residential Ltd | 01997057 | 19/10/1991 | 31/12/1991 | Dissolved |
| Cooke & Arkwright Services Ltd | 02205529 | 19/10/1991 | 31/12/1991 | Dissolved |
| Entwistle Green | 01248606 | 29/10/1991 | 31/12/1991 | Dissolved |
| Fairlie Robertson Financial Services Ltd | 01793122 | 19/10/1991 | 31/12/1991 | Dissolved |
| NATIONAL KIDNEY FEDERATION | 05272349 | 09/04/2022 | 13/04/2024 | Silver |
| OCTAVIA HILL BIRTHPLACE MUSEUM TRUST | 02797996 | 06/04/1993 | 18/03/2010 | Amber |
| OCTAVIA HILL TRADING LIMITED | 06521538 | 03/03/2008 | 18/03/2010 | Amber |
| Renton & Renton | 01426403 | 29/10/1991 | 31/12/1991 | Dissolved |
| Rumsey & Rumsey | 01690778 | 29/10/1991 | 31/12/1991 | Dissolved |
| Storey Sons & Parker (1988) | 02257512 | 29/10/1991 | 31/12/1991 | Dissolved |
| Sykes Waterhouse | 01650940 | 29/10/1991 | 31/12/1991 | Dissolved |
| T P G Insurance Services Ltd | 01552694 | 18/05/1991 | 18/05/1993 | Dissolved |
| THE PROPERTY OMBUDSMAN LIMITED | 03339975 | 25/03/1997 | 31/12/2003 | Bronze |
| The Abbeyfield Cambridge Society Ltd | 00701224 | 28/09/2000 | 07/04/2003 | Dissolved |
| Tilley & Noad | 02079240 | 29/10/1991 | 31/12/1991 | Dissolved |