Companies based in the Community of Madrid

Repsol S.A. () is a Spanish multinational energy and petrochemical company based in Madrid. It is engaged in worldwide upstream and downstream activities. In the 2022 Forbes Global 2000, Repsol was ranked as the 320th-largest public company in the world. As of 2022, it has 24,000 employees worldwide.

central bank

thumb|right|Map of the Spanish rail network in 2019, with colour-coded track types. Renfe Operadora operates on conventional Iberian gauge (red), high speed (blue), and narrow gauge (green) lines. thumb|right|A Renfe train ticket Renfe (, ), officially Renfe-Operadora, is Spain's national state-owned railway company.

Agencia EFE, S.A. () is a Spanish international news agency, the major Spanish-language multimedia news agency and the world's fourth largest wire service after the Associated Press, Reuters, and Agence France-Presse. EFE was created in 1939 by Ramón Serrano Súñer, then Francoist faction's Interior Minister.

Spanish aerospace manufacturing, now subsidiary of Airbus SE

Swiftair S.A. is an airline whose headquarters are in Madrid, Spain. It operates scheduled and charter, passenger, and cargo flights in Europe, North Africa and the Middle East. Its main base is Madrid–Barajas Airport.

Movistar () is a major telecommunications provider owned by Telefónica, operating in Spain and Hispanic American countries. It is the largest provider of landline, broadband, mobile services, and pay television (Movistar Plus+) in Spain. Movistar is the second-largest wireless carrier in Mexico, with 25.8 million subscribers as of January 2020.

Tuenti Technologies, S.L.U is a mobile virtual network operator (MVNO) that operates with the Tuenti brand owned by Telefónica. It is a Spain-based tech company that focuses on providing a cloud-based services through its own application and its website to their customers.

Acciona, S.A. () is a Spanish multinational conglomerate dedicated to the development and management of infrastructure (construction, water, industrial and services) and renewable energy. The company, via subsidiary Acciona Energía, produces 21 terawatt-hours of renewable electricity a year.

Spanish defense and information tech company

Spanish supermarket chain

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Sociedad Estatal de Correos y Telégrafos, S.A., S.M.E. (), trading under the name Correos (, "packages"), is a state-owned postal service and courier for Spain and Andorra, the latter bilateral with French-equivalent La Poste. Based in Madrid, it is one of the largest postal services in the world. Across Spain, it has more than 53,000 employees, over 10,000 branches and sends 5.4 billion pieces of mail each year.

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Promotora de Informaciones, S.A. (PRISA) is a Spanish media conglomerate headquartered in Madrid, Spain. It is one of the largest media companies in Spain and in Latin America, producing a wide variety of educational, cultural and informative content. PRISA owns a portfolio of newspapers, magazines, radio stations, and television networks. The majority subsidiaries and brands of the company are El País, Los 40, and Santillana.

Spanish electricity transmission system operator

Mapfre, S.A. (, officially typeset MAPFRE) is a Spanish multinational insurance company, based in Majadahonda, Madrid. The name comes from the old mutual origin of the company (Mutualidad de la Agrupación de Propietarios de Fincas Rústicas de España), but the company now only refers to itself as Mapfre. It is the leading insurance company in Spain and the largest non-life insurance company in Latin America.

Atresmedia Corporación de Medios de Comunicación, S.A., previously Grupo Antena 3, is a Spanish media group, present in the television, radio and filmmaking industries. Significant shareholders include Grupo Planeta and Bertelsmann via RTL Group.

Spanish media company

former Spanish energy company

Hipercor S.A. is an upscale chain of hypermarkets in Spain, belonging to the same group as El Corte Inglés. It has its head office in the El Corte Inglés head office building in Madrid.

Spanish subscription television corporation, managing the Spanish branch of Canal+ in Spain

Mercury Steam Entertainment S.L., doing business as MercurySteam, is a Spanish video game developer based in San Sebastián de los Reyes, Madrid.

Xfera Móviles, S.A.U., d/b/a Yoigo, is a Spanish telecommunications company in Spain and a subsidiary of the Spanish telecommunications company Grupo MásMóvil, a subsidiary of MásOrange.

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Compañía Arrendataria del Monopolio del Petróleo, S.A. (Campsa) was the state-owned petroleum products company of Spain. Created in the 1920s during General Primo de Rivera's dictatorship, it was dissolved in 1992 owing to the demands of the European Union. Its assets were distributed to the largest private petroleum companies in the Spanish market at the time, which were mainly Repsol, Cepsa and BP. The rights to the Campsa brand were given to Repsol. thumb|Campsa service station in Valladolid

Spanish TV producer, distributor and licensing agent

Spanish jewelry company

Spanish food processing company

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Spanish television channel

Mobile and internet provider

Spanish water company

Trasmediterránea operates passengers and cargo ferries between mainland Spain and the Canary Islands, the Balearic Islands, and northern Africa's Spanish territories. Since 2017 the majority of the company belongs to Naviera Armas.

Spanish animation studio

Zeltia is a former Spanish pharmaceutical company which operated through a variety of subsidiaries in the pharmaceutical and chemical industries. As of 2007, Zeltia's research activities in the pharmaceutical area had not resulted in a marketed product. However, the company's majority shareholder and chairman are the same person, which has relieved the pressure which many CEOs have experienced to produce immediate returns.

Metrovacesa is one of the largest real estate developers in Spain. Its main activity focuses on the development and sale of residential properties, complemented by the execution of commercial projects and active land management. Metrovacesa offers a wide variety of new residential developments and commercial premises throughout the country, covering major cities, tourist destinations, and high-potential urban areas.

PharmaMar is a Spanish pharmaceutical company headquartered in Colmenar Viejo, Madrid, Spain. Founded in 1986 as a subsidiary of Zeltia, it absorbed its parent company and all its subsidiaries in a reverse merger takeover in 2015. The company is a component of the Madrid Stock Exchange General Index (IGBM) and the IBEX 35 since 2020, after being part of the Ibex Small Cap stock market index.

Spanish subsidiary of the British telecommunications company Zegona Communications

Spanish chain of department stores

Spanish subscription television channel

television channel

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