Tomás Arranz

Partner since 2021 ––– Madrid
Member no. 99355 of the Madrid Bar Association
Main practice areas
  • English



Tomás Arranz is a partner at the Competition and EU Law Practice Area. He has worked in the Brussels and Madrid offices and in 2013 he was seconded to the Dutch firm De Brauw Blackstone Westbroek as foreign associate.

His practice focuses on EU and Spanish Competition law and has been involved in a variety of national and international antitrust infringement cases, and is regularly asked to advise on complex mergers (including the coordination of international multi-jurisdictional filings) and on the drafting and negotiation of franchise and distribution agreements. He has also implemented antirust compliance programmes and delivered training sessions for numerous clients.

Tomás represents leading companies from different sectors, such as banking and insurance, pharma, daily consumer goods, energy, waste management, real estate, automotive parts and building materials.

He has been recognised by the directory Competition - Future Leaders,published by Global Competition Review and Who’s Who Legal, where he has been included as one of the most highly regarded practitioners in continental Europe aged 45 or under.

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  • Law Degree, Universidad Autónoma de Madrid, 2011
  • Business Administration Degree, Universidad Autónoma de Madrid, 2011
  • Postgraduate Diploma in European Union competition law, King’s College, London, 2014

Professional associations

  • Madrid Bar Association
  • Spanish Association for the Defence of Competition (AEDC)

Teaching activity

Tomás is the academic director of the Master’s Degree in International Legal Practice at the Instituto Superior de Derecho y Economía (ISDE), where he also lectures on competition law.

He is part of the faculty of the Master in Law of Regulated Markets, the Master in Legal Practice and the Program of Expert in Competition Law of the Carlos III University of Madrid, and also lectures in the Master in Energy Finance of the Spanish Energy Club and in the Program of Specialisation in Competition Law of the IEB.

He also participates as a speaker on competition law matters in conferences and seminars.

Recent publications