| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CORE CONSTRUCTION GROUP LIMITED | 05302851 | 02/12/2004 | Bronze |
| CORE CONSTRUCTION MANAGEMENT LIMITED | 08958110 | 16/11/2015 | One Red Flag |
| CORE ENGINEERING SERVICES LIMITED | 05302850 | 02/12/2004 | Bronze |
| GEKIN LIMITED | 04177118 | 12/03/2001 | Dissolved |
| GEKIN PROPERTY LIMITED | 05067037 | 10/03/2004 | Dissolved |
| GEO QUARRIES (LITTLE PONTON) LTD | 09408910 | 14/07/2015 | Amber |
| GO2023 REALISATIONS LTD | 09790057 | 26/01/2018 | Insolvent |
| HCE TRAINING LIMITED | 05303096 | 02/12/2004 | Dissolved |
| HEWLETT CIVIL ENGINEERING LIMITED | 02196045 | 17/09/1991 | Insolvent |
| HEWLETT CONSTRUCTION GROUP LIMITED | 05117806 | 06/05/2004 | One Red Flag |
| HEWLETT ENVIRONMENTAL LIMITED | 05302753 | 02/12/2004 | Dissolved |
| HEWLETT PLANT HIRE LIMITED | 02600937 | 12/04/1992 | Dissolved |
| HEWLETT RAIL LIMITED | 04715717 | 28/03/2003 | Dissolved |
| LINCTON LIMITED | 07180317 | 20/05/2010 | Dissolved |
| PACE PROPERTIES LIMITED | 11316687 | 18/04/2018 | Dissolved |
| PORTFORD HOMES LIMITED | 01627774 | 17/03/2004 | Dissolved |
| RAND TRAINING LIMITED | 04949671 | 27/05/2010 | Dissolved |
| ULLSWATER (BARNSLEY) LIMITED | 04177235 | 06/04/2001 | Dissolved |
| ULLSWATER ESTATES LIMITED | 04061199 | 29/08/2000 | Dissolved |
| Ullswater Birmingham Ltd | 04389491 | 20/03/2002 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CORE MINOR WORKS LIMITED | 05297430 | 26/11/2004 | 15/01/2013 | Silver |
| CORE SPECIAL PROJECTS LIMITED | 05012836 | 12/01/2004 | 15/01/2013 | Silver |
| Juggernaut (Birmingham) Ltd | 04144474 | 24/04/2002 | 12/11/2003 | Dissolved |
| TWOFOLD FIRST SERVICES LLP | OC366101 | 01/03/2012 | 22/02/2021 | Bronze |
| The Tara Suite Ltd | 02632240 | 19/04/1998 | 17/11/2002 | Dissolved |