| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CHERRYMAIN LIMITED | 02918760 | 20/04/1994 | Dissolved |
| McAlpine,Sir Robert,(Construction) Ltd | 00253836 | 07/05/1992 | Dissolved |
| McAlpine,Sir Robert,(North Eastern) Ltd | 00574064 | 06/06/1991 | Dissolved |
| McAlpine,Sir Robert,(Wales) Ltd | 00406302 | 06/06/1991 | Dissolved |
| McAlpine,Sir Robert,(Western) Ltd | 02641525 | 20/09/1991 | Dissolved |
| McAlpine,Sir Robert,(Yorkshire) Ltd | 00353252 | 06/06/1991 | Dissolved |
| Stockingstone Ltd | 01141250 | 06/06/1991 | Dissolved |
| Vertical Axis Wind Turbines Ltd | 01731163 | 05/09/1991 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CAFEFIRST LIMITED | 05366066 | 10/08/2005 | 30/01/2008 | One Red Flag |
| GLENDURHAM LIMITED | 00639472 | 06/06/1991 | 22/07/2010 | Dissolved |
| McAulay Developments Ltd | 02913068 | 20/04/1994 | 01/04/2008 | Dissolved |
| PARK LANE AMERICA HOLDINGS LIMITED | 01389155 | 06/06/1991 | 23/02/2024 | Silver |
| RENEWABLE ENERGY SYSTEMS HOLDINGS LIMITED | 04913497 | 04/11/2003 | 15/03/2017 | Silver |
| RENEWABLE ENERGY SYSTEMS LIMITED | 01589961 | 04/09/1998 | 25/02/2009 | Silver |
| RES-GEN LIMITED | 04913485 | 05/11/2003 | 01/07/2008 | Dissolved |
| SIR ROBERT MCALPINE (HOLDINGS) LIMITED | 02754943 | 18/01/1994 | 02/11/2015 | Bronze |
| SIR ROBERT MCALPINE LIMITED | 00566823 | 06/06/1992 | 02/11/2015 | Bronze |
| SIR ROBERT MCALPINE MANAGEMENT CONTRACTORS LIMITED | 01157770 | 06/06/1991 | 02/11/2015 | Not Trading |