ACS Actividades de Construccion y Servicios is a holding company. Through its subsidiaries, Co.'s activities are divided into the following areas: Construction, engaged in the construction of civil works, and residential and non-residential building construction; industrial services, engaged in the development of applied engineering services, installations and the maintenance of industrial infrastructures in the energy, communications and control systems sectors; services, groups together environmental services, the outsourcing of building maintenance services, logistics and transport services; and concessions, mainly engaged in transport infrastructure concessions.

Ferrovial is a transportation company based in Spain. Co. is engaged in operations in the transportation sector. Co. specializes in the design, construction, management, administration and maintenance of transport infrastructures. Co.'s services range also includes the maintenance of parking lots, and land-, sea- and air-based transport networks. Co. is also engaged in the promotion and operation of short-stay parking lots, parking regulation and management services and promotion and sale of residents' parking.

Global Dominion Access SA is a Spain-based company primarily engaged in the construction and engineering sector. The Company's activities are divided into two segments: Multi-technological Services, which offers design, implementation and maintenance of fixed and mobile telecommunications networks, manages sales and distribution processes for telecommunications carriers, as well as renders of inspection, maintenance, repair and renovation services for industrial and energy firms, and Solutions and EPCs, which executes turnkey Engineering-Procurement-Construction (EPC) projects, provides construction, repair and renovation of industrial heating installations, as well as develops processes and other technological and business solutions in numerous sectors. Its services are provided in three areas: Technology and Telecommunications (T&T), Industry and Renewable energies. It operates worldwide in Europe, the Americas, Asia and Africa. The Company is a subsidiary of CIE Automotive SA.