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Guillermo Cabanellas

He/Him/HisSenior Partner
"Seasoned practitioner Guillermo Cabanellas of DLA Piper comes highly recommended by interviewees for his longstanding practice in the field. A market observer reports: 'He is a renowned academic and professional,' while another states: 'Guillermo Cabanellas is one of the leading practitioners in the antitrust arena.'" –Chambers Latin America, 2023

Dr. Guillermo Cabanellas is a Senior Partner in Corporate Group and Managing Partner at DLA Piper Argentina. Dr. Cabanellas has held pre-eminent positions in Argentina for major project developments, restructurings, and financings during the past decades, both as private practitioner and advisor to the Federal Government.

He holds degrees in economics (1971) and law (1972) from the University of Buenos Aires. He also has a Master in Comparative Law and a Juridical Science Doctor degree from the University of Illinois. Dr. Cabanellas has been research fellow at the Max Planck Institute, Munich, in 1981, 1982 and 1987, and professor at the Universities of Illinois, Miami and Loyola of Los Angeles.

He is professor at the National University of Buenos Aires and at the Universidad de San Andrés. He has published more than 40 books and 100 articles in Argentina, United States, and different European countries.


  • Patent litigation (printing devices).
  • Antitrust litigation (Fehgra v. Sadaic, on copyright management
  • Antitrust litigation (Amfin v. Clarin, on predatory practices)
  • Antitrust litigation (Gerdau case, on predatory practices)
  • YPF expropriation litigation (expert witness for YPF)
  • Aguas Argentinas expropriation litigation expert witness for Aguas Argentinas)
  • Arbitrator in several sports cases for the Tribunal Arbitral du Sport (Switzerland)
  • Trademark litigation (Benegas v. Durigutti)
  • Distribution law litigation (in re Goodies)
  • Shareholders litigation (in re Dunlop Argentina
  • Spanish
  • English
  • French
  • Italian
  • German
  • J.S.D., University of Illinois, 1978 
  • Master in Corporate Law, University of Illinois, 1975

  • Degree, Law, Universidad de Buenos Aires, 1972

    Degree, Economics, Universidad de Buenos Aires, 1971


The Legal 500 Latin America

  • Recommended, Argentina Banking and Finance (2023 - 2024)

Chambers Latin America

  • Senior Statesperson, Argentina Competition/Antitrust (2020 - 2023)

Latin Lawyer 250

  • Highly Recommended Key Partner, Argentina Corporate and M&A (2023)

Guillermo Cabanellas was named the Best Lawyers 2020 Competition/Antitrust Law "Lawyer of the Year" in Argentina.

  • 2000-2001 University of Illinois College of Law. Distinguished Gradudate.

Insight Overview

Guillermo has authored over 40 books and more than 100 articles in several law reviews in Argentina, the United States and Europe.


Sociedades anónimas. Los accionistas. Derechos, obligaciones y responsabilidades (Editorial Heliasta, Buenos Aires, 2019)

Derecho de la distribución comercial (Thomson Reuters. La Ley, 2019) (with D.H.Serebrinsky).

Código Penal y normas complementarias (Hammurabi, Buenos Aires, 2022)

Compendio del Derecho de Autor (Editorial Heliasta, Buenos Aires, 2023)

Contratos de Franquicia (Thomson Reuters. La Ley, Buenos Aires, 2023) (with D. H. Serebrinsky).

Other Publications:

Fundamentos jurídicos y económicos del régimen de competencia desleal, in “Competencia desleal” (La Ley, Buenos Aires, 2019), p.3.

Marcas y competencia desleal en Internet, in “Revista Derecho y Nuevas Tecnologías” (2020), Nr. 2, p.19(with P.Palazzi).

El contenido económico de las sociedades y su incidencia sobre el análisis del Derecho Societario, in “Estudios de Derecho Comercial. Homenaje al Prof. Dr. José A. Ferro Astray (Montevideo, 2020), p.15.

El marco jurídico de la innovación, in “La Ley Suplemento Innovación y Derecho”, Nov. 2020, p. 1.

Grandezas y miserias del Derecho Comparadode la propiedad intelectual, in “Propiedad Intelectual. Contratacao e Sociedade da Informacao. Estudios de Homenaje a Manue Oehen Mendes “ (Coimbra, 2022), p. 23.


Guillermo has authored over 40 books and more than 100 articles in several law reviews in Argentina, the United States and Europe.

Guillermo has been a law professor for over 30 years at the Universidad de Buenos Aires and the University of Illinois. He served as Director of the Master of Business Law degree program at the Universidad de San Andrés until December 2008 and has also served as Director of the Banking Program at the Universidad Austral.

Memberships And Affiliations

Argentine Academy of Legal Science – Commercial Chapter

Member of the bars of the City of Buenos Aires and of the Province of Buenos Aires