Acciona is the parent company of a construction group. Co. is engaged in general construction activities in the areas of civil engineering and buildings, including railways, marine and hydraulic works, motorways and airports, town planning, conduits, pavements, parking lots, and industrial and urban buildings. In addition, Co. is engaged in the provision of real estate services, the operation of parking lots, telecommunications, services, ecology and alternative means of energy. Co.'s operations are organized in six business divisions: Infrastructures, Real Estate, Energy, Water, Environmental & Urban Services and Logistic & Transport Services.

Banco Santander is a holding company, providing a range of financial products. Co.'s products and services include: retail banking business that covers all customer banking businesses; wholesale banking business; as well as asset management and insurance business. Co.'s principal operations are in Spain, the U.K., Portugal, Germany, Italy and Latin America. As of Dec 31 2014, Co.'s total assets amounted to Euro1,266,296,000,000 and total customer deposits amounted to Euro647,627,000,000.

Cellnex Telecom SA is a Spain-based company engaged in the wireless telecommunications (telecom) business. Its activities are divided into three segments: Broadcasting infrastructure, Telecom site rental, as well as Network services and other. The Broadcasting infrastructure division comprises distribution and transmission of television (TV) and frequency modulation (FM) radio signals, operation and maintenance (O&M) of radio broadcasting network, as well as over-the-top (OTT) radio services, among others. The Telecom site rental division provides access to wireless infrastructure, primarily through infrastructure hosting and telecom equipment co-location, mainly for mobile network operators and other wireless and broadband telecom network operators. The Network services and other division offers connectivity services for a variety of telecom operators and radio communication, among others. The Company also develops 5th generation mobile networks (5G) through Alticom BV.

CIE Automotive is the parent company of an industrial group formed by several companies that are engaged in the design, manufacture and sale of automobile component and sub-units on the world market. In addition, Co. is also engaged in the bio-fuels business which is in the initial stages of development and is made up of various companies devoted to the production and distribution of bio-fuels.

Mapfre is an insurance company based in Spain. Co. is the parent company of a group engaged in the underwriting and provision of insurance in Spain and abroad. Insurance policies provided include: life, non-life, accident, home-owner, general and health. Through its subsidiaries, Co. is also engaged in the provision of reinsurance, the management of investment funds, pension funds and pension plans, real estate and related services. On the domestic market, Co.'s activities include managing investment funds, pension funds and pension plans, real estate and other service businesses.

Red Electrica is engaged in the transmission of electrical energy, the operation of the system and the management of the transmission network in the Spanish electricity system. In addition, through its subsidiaries, Co. is engaged in the acquisition, holding and management of foreign securities, co-ordination of international exchanges, provision of telecommunications services for third parties, provision of consultancy, engineering and construction services outside the Spanish electricity system, securing of funds, carrying out of financial transactions and provision of financial services.

Talgo is engaged in designing, manufacturing, repairing and maintaining the railway rolling stock, as well as the manufacturing, assembling, repairing and maintaining the engines, machinery and parts of the railway systems. Co. has an industrial presence in seven countries: Spain, Germany, Kazakhstan, Uzbekistan, Russia, Saudi Arabia and U.S.A. Co. has an active fleet in Europe, Asia and North America that comprises of 94 high-speed trains and more than 1,400 Talgo tilting passenger cars. Also, Co. purchases, redesigns, constructs, leases and sells all types of real estate.