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.

Atlantia is a holding company with subsidiaries and associates whose business is the construction and operation of motorways, airports and transport infrastructure, parking areas and intermodal systems, or who engage in activities related to the management of motorway or airport traffic.

CFE is engaged in civil engineering, buildings and industrial construction, dredging works and electrical installations. Co. is also engaged in property development, environmental protection and building management. Co.'s works carried on by Co.'s civil engineering group includes the following: hydraulic engineering, harbor works, bridges, and other engineering works, tunnels, road construction, dams, storage tanks, piping and drainage and caissons sunken soft soil. Co.'s buildings and industrial construction sector is active in the following fields: administrative buildings, industrial construction, public utility buildings, redevelopment, and residential buildings.

Eiffage is a construction and concessions group. Co.'s operations are organized into five divisions. The Concessions and PPPs division is engaged in construction and operating of infrastructures under concessions and public private partnerships. Through the Construction division, Co. is engaged in building design and construction, property development and building maintenance. Through the Public works division, Co. is engaged in civil engineering, road construction, infrastructure maintenance and material production. The Energy division specializes in electrical contracting and air conditioning. Through the Metal division, Co. is engaged in metallic construction and services to industry.

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.

Getlink SE, formerly known as Groupe Eurotunnel SE, is a France-based company, which brings together a group of companies active in the fields of infrastructure management and transport operations. Its various entities share the attention to quality and customer service, with priority given to safety. The Company manages and operates the Channel Tunnel between the United Kingdom and France and its railway infrastructure. The Company is also engaged in the passenger and freight transport between continental Europe and the United Kingdom. In addition, it provides ferry transport through the Channel. Getlink SE has direct and indirect stakes in a number of companies, including The Channel Tunnel Group Limited, France Manche SA and Europorte SAS, among others.

Hochtief is a holding company. Through its subsidiaries, Co. operates as a construction company engaged in projects in the transportation, energy, and social and urban infrastructure sectors as well as contract mining. Co. provides its services through three divisions: HOCHTIEF Americas, which encompasses the construction activities of operational units in the U.S and Canada; HOCHTIEF Asia Pacific, which includes the construction activities and contract mining in the Asia-Pacific region; and HOCHTIEF Europe, which designs, develops, builds, operates, and manages real estate and infrastructure, with primary business in Europe as well as selected other regions.

Hoffmann Green Cement Technologies SAS. Hoffmann Green Cement Technologies SAS is a France-based company, which manufactures cements. The Company mainly manufactures decarbonated cements for construction. Hoffmann Green Cement Technologies SAS is involved in the energy and ecological transition by manufacturing low carbon eco-materials.

Koninklijke Bam is a construction group based in the Netherlands. Co. is active in the sectors construction, property, civil engineering, public private partnerships, mechanical and electrical contracting, consultancy and engineering, and facilities management. Co. maintais market positions in the Netherlands, Belgium, the United Kingdom, Ireland and Germany. Co. undertakes specialist construction and civil engineering projects in niche markets worldwide. Co.'s consultancy and engineering company provides services to global clients with their international operations.

Royal Boskalis Westminster is a service provider operating in the dredging, dry and maritime infrastructure and maritime services sectors. Co. is involved in dredging activities and provides a range of maritime services for the offshore energy sector. In addition, Co. provides towage services as well as emergency response and salvage related services. Co.'s main clients are oil, gas and power companies, port operators, governments, shipping companies, international project developers, insurance companies and mining companies. Co. operates on behalf of its clients in over 75 countries across six continents.

Vinci is engaged in building, civil engineering and facilities management. Through its subsidiaries, Co. is engaged in five divisions comprising of: the Building division which provides retail solutions including construction and fit-out in both the retail and commercial sectors; the Civil Engineering division; the Air division which provides program management, engineering and construction services to customers with airport infrastructure requirements; the Technology division; and the VINCI Facilities division which provides facilities management, repair and maintenance and small works in both the private and public sectors.

Salini Impregilo is engaged in the water segment. Co. is organised according to the distribution of its activities into its various segments: Corporate, which is engaged in the coordination and supervision of Impregilo S.p.A.'s main investments; Construction, which consists of the business headed by Impregilo S.p.A.; Concessions, which consists of the business coordinated by Co.'s subsidiary, Impregilo International Infrastructures B.V. (the Netherlands) and carried out through subsidiaries, jointly controlled entities and associates; as well as Engineering & Plant Construction, which consists of the business headed by FISIA Italimpianti and FISIA Babcock Environment (Germany).