Aena SME SA, formerly Aena SA, is a Spain-based company primarily engaged in the airports operation. Its activities are divided into four segments: Airports, which comprises Aeronautical subdivision, responsible for the management of airports, jetways, security, handling, cargo and fuel services, among others, as well as Commercial subdivision, including duty-free and specialty stores, restaurant services, car rental, as well as banking services and advertising; Services outside the terminal, which manages real estate assets, such as parking lots, warehouses and lands; International, which comprises operations of Company's subsidiary, Aena Desarrollo Internacional SA, that invests in other airport owners principally in Mexico, Colombia and the United Kingdom; and Others, encompassing corporate activities. It manages tourism, hub and regional airports, as well as heliports and general aviation areas. Furthermore, its destination range comprises Europe, the Americas, Asia and Africa.

Amper is the parent company of a group engaged in the telecommunications industry. Co. and its subsidiaries are engaged in the research, development, manufacture, sale, repair and maintenance of electronic systems and telecommunication equipment. Co.'s range of expertise includes network management systems, local loop technology, switching center modernization systems, data communications systems, combat radio sets, parking meter engineering, installation and maintenance services, vehicle localization and navigation systems, and energy systems. Products include private and public telephones, digital commutation systems, and cellular phone equipment.

Indra Sistemas is engaged in the design, development, manufacture, assembly, repair, and installation of computer software and applications. Through its subsidiaries, Co. is engaged in consulting, graphic design and multimedia, web design and marketing, internet development and electronic trade, systems integration and hosting geared business to business and business to consumer, as well as in internet financing and electronic marketing. Co. serves defense and security, transport and traffic, energy and industry, telecom and media, finance and insurance, and public administration and healthcare markets. Co. operates primarily in Europe, the United States, Canada, and Latin America.

International Airlines Group is an international scheduled airline and global premium airlines. Co.'s principal place of business is London with significant presence at Heathrow, Gatwick and London City airports.