Juan Serrada Hierro

Sociedad Estatal de Participaciones Industriales (SEPI) operates as a holding group. It is a state owned industrial holding company whose holdings include airline, mining, power generation, marine transport, aerospace, information technology and engineering and construction sectors. SEPI was founded in 1995 and is headquartered in Madrid, Spain.

Transportes Azkar SA provides logistics services. It offers door-to-door transit services through the business division Azkar Overseas, which also offers port logistics, customs, air freight, and ancilliary technical services. The group operates a fleet of 2,400 vehicles and 73 distribution and logistics facilities. Transportes Azkar was founded in 1933 and is headquartered in Lazkao, Spain.

Part of Svenska Cellulosa AB SCA, Grupo Lantero SA is a Spanish company that manufactures cardboard for packaging through subsidiaries. The company is based in Madrid, Spain. The company was founded in 1950 by José Lantero.

Atento Holding Telecomunicaciones SA provides e-CRM solutions through the internet and call centers. It is a subsidiary of Telefonica SA. The company operates in the following countries: Brazil, Argentina, Chile, Peru, Guatemala, El Salvador, Puerto Rico, Colombia, Morocco, Spain and the United States of America. Atento was founded in 1999 and is headquartered in Madrid, Spain.

Instituto de Educación e Investigación operates as an investment company. The firm is based in Madrid.

MIBGAS SA engages in the distribution of natural gas, and management and operation of natural gas market. Its service portfolio includes management of products, agents, associated documents, price, volume, and trading report. The company was founded was founded on June 15, 2012 and is headquartered in Madrid, Spain.

Telxius Telecom SA operates as a international telecommunication infrastructure company. It owns and manages assets that offer services to multiple global telecommunications carriers, wholesale and retail telecommunications operators, and over-the-top content providers in several geographies. The firm operates through the following segments: Cable and Towers. The Cable segment provides whole Internet access to its customers worldwide via Telxius' submarine infrastructure and international circuits. The Towers segment offers co-location of space on multi-tenant telecommunication towers mainly to mobile network operators, both to Telefonica group companies and to third parties, through its portfolio of telecommunication towers. The company was founded on October 10, 2012 and is headquartered in Madrid, Spain.

Ellalink Ireland Ltd. deploy and operates submarine cable systems. It offers capacity services, ultra low latency and network configuration services. The company was founded in 2012 and is headquartered in Dublin, Ireland.