| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ADAMSCASTLE LIMITED | 02369949 | 31/07/2010 | Dissolved |
| ADAMSON NEWCASTLE LIMITED | 02570842 | 31/07/2010 | Dissolved |
| KINGS MANOR PROPERTIES LIMITED | 05560688 | 01/05/2015 | Dissolved |
| N.B.S. FINANCIAL SERVICES LIMITED | 02063867 | 31/07/2010 | Dissolved |
| NEWCASTLE CARD SOLUTIONS LIMITED | 06933684 | 31/07/2010 | Dissolved |
| NEWCASTLE DEVELOPMENTS LIMITED | 02712062 | 31/07/2010 | Dissolved |
| NEWCASTLE MORTGAGE CORPORATION LIMITED | 02583451 | 31/07/2010 | Dissolved |
| NEWCASTLE MORTGAGE SERVICES LIMITED | 05008580 | 31/07/2010 | Dissolved |
| NEWCASTLE UNIVERSITY HOLDINGS LIMITED | 03068111 | 08/09/2021 | One Red Flag |
| NEWTON FACILITIES COMPUTER LEASING LIMITED | 03513416 | 31/07/2010 | Dissolved |
| NEWTON FACILITIES COMPUTER PURCHASING LIMITED | 03512476 | 31/07/2010 | Dissolved |
| STRACHANS (NEWCASTLE) LIMITED | 02211993 | 31/07/2010 | Dissolved |
| UNIVERSAL LIMITED | 04901106 | 31/07/2010 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| NEWCASTLE FINANCIAL ADVISERS LIMITED | 04509702 | 23/11/2010 | 06/03/2018 | Silver |
| NEWCASTLE PORTLAND HOUSE LIMITED | 02296093 | 06/06/2011 | 27/04/2018 | Dissolved |
| NEWCASTLE STRATEGIC SOLUTIONS LIMITED | 04555739 | 20/09/2005 | 20/03/2006 | Silver |
| NEWCASTLE SYSTEMS MANAGEMENT LIMITED | 03353513 | 31/07/2010 | 01/11/2013 | Dissolved |
| NORTHERN HOMES AND ESTATES LIMITED | 00282391 | 15/10/2019 | 27/02/2024 | Not Trading |
| ST CUTHBERT'S CARE | 01645917 | 22/02/2002 | 31/03/2015 | Silver |
| THE PERCY HEDLEY FOUNDATION | 01855026 | 30/11/2016 | 30/09/2021 | Gold |
| WILLIAM LEECH (INVESTMENTS) LIMITED | 00518571 | 15/10/2019 | 27/02/2024 | Silver |
| WILLIAM LEECH FOUNDATION LIMITED(THE) | 00664118 | 15/10/2019 | 27/02/2024 | Bronze |