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.

Aeroports de Paris is the airport authority that owns and manages the fourteen civil airports and airfields in the Ile-de-France (Paris) area. Co. owns and operates the three main airports of the Ile de France region (Paris-Charles de Gaulle, Paris-Orly and Paris-Le Bourget), 10 general aviation airfields and the Issy-les-Moulineaux heliport. In the three main airports, Co. provides facilities to accommodate passengers, airlines and cargo and postal services, and offers a range of services. Co.'s activities are divided into five business segments: Aviation, Retail and Services, Real Estate, Airport Investments and Other Activities.

Fraport AG Frankfurt Airport Services Worldwide is an airport operator. Co. is divided into four segments: aviation, which includes airside and terminal management as well as corporate safety and security at the Frankfurt site; retail and real estate, which consists of retailing activities, parking facility and real estate management at Frankfurt Airport; ground handling, which comprises services dealing with passengers, aircraft and cargo; and external activities and services, which comprises Co.'s companies outside the Frankfurt site and auxiliary services in Frankfurt, including information technology and facility management in particular.