| Name | Type | Sector | Country | Joined On |
|---|---|---|---|---|
| Sacyr, S.A. | Company | Construction & Materials | Spain | 14-Dec-2007 |
| ADASA | Small or Medium-sized Enterprise | Construction & Materials | Spain | 21-Jun-2007 |
| Fomento de Construcciones y Contratas, S.A. | Company | Construction & Materials | Spain | 07-May-2007 |
| TQ Tecnol, S.A | Small or Medium-sized Enterprise | Construction & Materials | Spain | 17-Jul-2006 |
| Orona, S. Coop | Company | Construction & Materials | Spain | 23-Mar-2006 |
| FCC Construccion, S.A | Company | Construction & Materials | Spain | 23-Mar-2005 |
| Grupo OHLA | Company | Construction & Materials | Spain | 17-Feb-2004 |
| Duro Felguera, S.A. | Company | Construction & Materials | Spain | 30-Sep-2002 |
| Grupo ACS | Company | Construction & Materials | Spain | 30-Sep-2002 |
| Ferrovial S.A. | Company | Construction & Materials | Spain | 03-Jul-2002 |
| Comsa Corporación | Company | Construction & Materials | Spain | 24-Jun-2002 |