Amadeu Ribeiro

Amadeu Ribeiro

Partner

US-LatAm Practice Group Regional Co-Leader, Regulatory and Antitrust/Compliance

US-LatAm Practice Group Regional Co-Leader, US-Brazilian Initiative

Amadeu is a prominent figure in the competition and antitrust area.
— Competition/Antitrust, Chambers 2023
New YorkDLA Piper Brazil
About

Amadeu Ribeiro has more than 25 years of experience advising clients on complex cross-border antitrust matters, including multijurisdictional merger review cases, as well as cartel 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 Global 2026 ranks Amadeu for Competition/Antitrust, while Chambers 2023 acknowledges him as an "eminent antitrust practitioner." In 2021, the American Bar Association awarded Amadeu 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 co-chair of the Media & Technology Committee 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.

Areas of FocusLitigation, Arbitration and InvestigationsMergers and AcquisitionsRegulatory and Government AffairsEnergy and Natural ResourcesLife SciencesTechnology
Bar admissionsNew YorkBrazil

EXPERIENCE

  • Advised Silicon Labs, a leading low-power wireless connectivity company, in its acquisition by Texas Instruments
  • Advised Safety Insurance, a leading insurance company, in its acquisition by Mapfre
  • Advised Grupo Cox, a leading Spanish multinational water and energy company, in its acquisition of Iberdrola's power generation assets in Mexico for US$4.2 billion
  • Advised S&P Global in its agreement to acquire the Automatic Identification System (AIS) data services business of ORBCOMM Inc. The acquisition will strengthen S&P's supply chain and maritime offerings
Languages
  • German
  • Portuguese
  • Spanish

AWARDS

Chambers Global

  • Brazil: Competition/Antitrust (2004, 2006 – 2008, 2011 – 2014, 2026)

Chambers Brazil

  • Brazil: Competition & Antitrust, (2012 – 2023) 

The Legal 500 United States

  • Recommended, Antitrust: Cartel, (2024 – 2025)

The Legal 500 Latin America

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

Lexology Index

  • Thought Leader, USA, (2026 – 2027)
  • Recommended, Competition, (2025 – 2026)

Leaders League

  • Highly Recommended, Brazil: Capital Markets, Best International Law Firms, (2025 – 2026)
  • Recommended, Brazil: Mergers & Acquisitions, Best International Law Firms, (2025 – 2026)

Best Lawyers

  • Recognized, Antitrust Law (2020 – 2026)

Latin American Corporate Counsel Association (LACCA)

  • Approved, Antitrust & Competition, (2024, 2026)
  • Recognized, Antitrust & Competition, (2015, 2021 – 2023)
  • Thought Leader, Antitrust, (2019 – 2020, 2023)

Latin Lawyer 250

  • Recognized, Antitrust and Competition, (2012 – 2023)

Who's Who Legal Brazil

  • Recognized, Competition, (2014 – 2023)
  • Thought Leader, Competition, (2021)

Who's Who Legal US

  • Thought Leader, Competition, (2022)

Who's Who Legal Global

  • Recognized, Competition, (2021 – 2022)

American Bar Association

  • Recipient, Outstanding Performance Award, (2021)
Education
  • LL.M., Fordham University School of Law
    cum laude
  • J.S.D., University of São Paulo
  • LL.B., University of São Paulo

Publications

  • Co-author, "Next Gen Law Firm Management," West Academic, 2026
  • Co-author, "Navigating antitrust compliance under California’s SB 54: What producers, suppliers, and industry conveners need to know," DLA Piper Insight, July 7, 2026
  • Co-author, Juntos Newsletter (multiple editions), September 2024 – June 2026
  • Co-author, "US Designates Two Brazil-Based Transnational Criminal Organizations as Terrorist Entities," DLA Piper Insight, June 2, 2026
  • Co-author, "DOJ and FTC Leadership Discuss New Perspectives on Merger Enforcement," DLA Piper Insight, June 18, 2025 
  • Co-author, "DLA Piper Attorneys Co-author Article in The International Financial Law Review (IFLR)," May 27, 2025
  • Co-author, "Antitrust Litigation in Brazil: Framework and Key Developments," American Bar Association Antitrust Law Section, March 2025
  • Co-author, "Abuse of Dominance in Latin America: An Overview of Legal Frameworks in Argentina, Brazil, Chile, Mexico and Peru," American Bar Association Antitrust Law Section, March 2025
  • Co-author, "FTC Signals Continuation of Rigorous Approach to Merger Enforcement," DLA Piper Insight, February 27, 2025
  • Co-author, "Cartel Enforcement Is Evolving Across the Americas: Three Aspects to Consider," DLA Piper Insight, October 2, 2024
  • 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
     

Seminars

  • Speaker, "Geopolitical Shifts Translating into Compliance and Regulatory Risks," JOTA Global, September 23, 2026
  • Panelist, "Telecom M&A: Navigating the Evolving Landscape," April 29, 2026
  • Speaker, "Webinar: Merger Control in the Americas," March 13, 2025
  • Speaker, 2024 Chief Compliance Officer Virtual Summit, October 24, 2024
  • Moderator, "Financing the Energy Transition in Latin America," Brazil-American Chamber of Commerce, US-Mexico Chamber of Commerce, and the Andean American Associations, September 2025
  • Moderator, "Investing in Data Centers in Brazil," Brazilian-American Chamber of Commerce, September 2025
  • Moderator, "Rule of Law and Legal Certainty in Investments in Brazil," Brazil Summit, Brazilian-American Chamber of Commerce, April 2025
  • Panelist, "Merger Control in the Americas," DLA Piper Webinar, March 13, 2025
  • Speaker, "The Nuts & Bolts of Vertical Restraints in Latin America," International Committee of the Antitrust Law Section, American Bar Association, November 20, 2024
  • Speaker, "Current Challenges in Multi-Jurisdictional Reviews," Antitrust in the Americas, June 2023
  • Speaker, "Canada Launches Employer Cartel Offences; Who's Next?" Antitrust Law Section, American Bar Association, May 2023
  • Speaker, "Ethics & Compliance in Global Investigations," 71st Annual Antitrust Spring Meeting, Antitrust Law Section, American Bar Association, March 2023

Media Mentions

PODCASTS

Memberships

American Bar Association, Antitrust Law Section

  •  Co-chair, Media & Technology Committee

Brazilian-American Chamber of Commerce in New York

  • Vice-president and Member, Executive Committee
  • Chair, Investing in Brazil Committee

My latest insights

Podcast

Brazil: A conversation on the landscape of opportunities ahead

14 June 2024 .1 minute read

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Phone

+1 212 335 4880
(Work, New York)

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