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Guillermo Cabanellas

Senior Partner

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.

  • J.S.D., University of Illinois
  • Master in Corporate Law, University of Illinois
  • Degree, Law, Universidad de Buenos Aires 1972


  • Guillermo Cabanellas was named the Best Lawyers 2020 Competition/Antitrust Law "Lawyer of the Year" in Argentina
  • Chambers Latin America
    2023 - Senior Statesperson, Argentina Competition/Antitrust
    2022 - Senior Statesperson, Argentina Competition/Antitrust
    Chambers comments, "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.'"
    2020-21 - Senior Statesperson, Argentina Competition/Antitrust
  • Latin Lawyer 250
    2023 - Key Partner, Corporate and M&A

Insight Overview

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