Company constituted in 1989 dedicated to the construction of all kinds of work.

Company constituted in 1966 devoted to constructing all kinds of work. It operates in Guipúzcoa and Navarra.

Company constituted in 2005 devoted to general construction. It operates in the Autonomous Region of Cantabria.

Company constituted in 2005 devoted to the construction of subterranean work and bank stabilisation actions.

Company constituted in 2004 dedicated to general construction. It mainly operates in the province of Álava.