Amadeu Ribeiro

Latam Practice Group Regional Co-Leader, Regulatory & Antitrust
Amadeu is a prominent figure in competition and antitrust area.
Chambers 2023, Competition/Antitrust

Amadeu has more than 25 years of experience advising clients on complex cross-border antitrust matters and investigations, including merger review cases, cartel, bid-rigging and abuse of dominance investigations. Over his career, Amadeu has advised clients from various sectors, including aviation, automotive, energy and natural resources, food and beverage, life sciences, and technology.

As a dual-licensed attorney active in both the United States and Brazil, Amadeu also serves as a trusted advisor to Brazilian companies with their cross-border legal matters in the Americas, advising them on matters ranging from complex transactions and market entry to compliance and regulatory issues.

Chambers 2023 ranks Amadeu as an "eminent antitrust practitioner." In 2021, the American Bar Association awarded him with the "Outstanding Performance Award." Amadeu is also ranked as a leading antitrust practitioner by virtually all other major legal publications, including Legal 500, Global Competition Review, Euromoney, LACCA, Latin Lawyer 250, and Who’s Who Legal.

Amadeu is part of the leadership of the American Bar Association - Antitrust Law Section and the Vice-President of the Brazilian-American Chamber of Commerce in New York. He is also an adjunct professor at the Fordham University School of Law in New York.

Bar admissionsNew YorkBrazil
  • LL.M., Fordham University, School of Law, cum laude
  • J.S.D., Universidade de Sao Paulo
  • LL.B., Universidade de Sao Paulo
  • German
  • Portuguese
  • Spanish


The Legal 500 Latin America

  • Recommended, Latin America: International Firms Corporate and M&A (2024)

Chambers Brazil

  • Brazil Competition & Antitrust (2012 – 2023)
Additional Recognitions
  • Antitrust & Competition, LACCA, 2015, 2021 – 2023
  • Antitrust, LACCA Thought Leaders, 2019 – 2020, 2023
  • Antitrust and Competition, Latin Lawyer 250, 2012 – 2023
  • Competition, Who's Who Legal Brazil, 2014 – 2023
  • Competition, Who's Who Legal Global, 2021 – 2022
  • Competition, Who's Who Legal Thought Leaders, Brazil: 2021, US: 2022
  • Outstanding Performance Award, American Bar Association, 2021

Publications and media

  • Co-Author, “Merger Control in Brazil - What to Have in Mind in the Context of a Multi-Jurisdictional Transaction,” June 2023
  • Co-Author, “Ethics Issues in Internal Antitrust Investigations in Brazil,” March 2023
  • Author, “Competition Law and Policy in Brazil: 2022 Retrospective and New Perspectives,” March 2023
  • Co-Author, “Competition Law Treatment of Joint Ventures - A Jurisdictional Guide,” November 2022
  • Co-Author, “Competition Law and Policy in Brazil: New Developments,” June 2022
  • Co-Author, “German Supply Chain Law Requires Companies to Adopt Due Diligence Procedures,” June 2022
  • Author, “Brazilian competition law: trends and perspectives for 2022,” February 2022


  • “Current Challenges in Multi-Jurisdictional Reviews,” Antitrust in the Americas, Rio de Janeiro, June 2023
  • “Canada Launches Employer cartel Offences; Who’s Next?,” American Bar Association - Antitrust Law Section, Toronto, May 2023   
  • “Ethics & Compliance in Global Investigations,” 71st Annual Antitrust Spring Meeting, American Bar Association - Antitrust Law Section, Washington, DC, March 2023

Media Mentions


Memberships and Affiliations

  • Co-chair of the Media & Technology Committee, Vice-chair of International Comments & Policy Committee, American Bar Association - Antitrust Law Section
  • Vice-President and member of the Executive Committee, Brazilian-American Chamber of Commerce in New York
  • Chair of the Investing in Brazil Committee, Brazilian-American Chamber of Commerce in New York