Mr Leonardo Maniglia Duarte > Veirano Advogados > Brasilia, Brazil > Lawyer Profile

Veirano Advogados
SCS Qd. 9 Lt. C - Parque Cidade Corporate - 12º andar (1203)
70308-200 - Brasília - DF

Work Department

Antitrust & Competition and Government & Regulatory




Leonardo Duarte focuses his practice in the areas of competition and regulatory law. He provides legal advice and risk assessment on competition and regulatory matters related to contracts (distribution agreements, supply agreements, joint venture agreements, among others), general business practices, mergers and other types of economic concentration. He regularly represents Brazilian and foreign clients before the competition and regulatory authorities on merger notifications, challenges to merger notifications, investigations of/into anticompetitive practices (cartels, abuse of dominance, among others) and regulatory violations in general.

Mr. Duarte has broad experience handling complex merger control cases, including multijurisdictional merger notifications. He also advises on anticompetitive investigations, including cases involving abuses of dominance, national and international cartels, dawn-raids, leniency agreements and negotiations of settlements. Mr. Duarte represents clients in litigation cases involving competition and regulatory matters before the federal courts in Brasília.

Clients value Mr. Duarte’s international knowledge and experience, enabling him to provide foreign and Brazilian companies with consistent, high quality and efficient legal services related to Competition Law and Regulatory Law issues. He represents companies in several industries such as Energy, Telecommunications, Pharmaceutics, Transport, Higher Education Services, Electronics, among others, based on the United States, Europe and Asian countries.

From August 2008 through September 2009, Mr. Duarte was a visiting associate at the European, Competition and Regulatory Law Department of a leading European law firm based in Lisbon, Portugal. During this period, he provided legal advice and represented clients before the Portuguese Competition Authority and the Directorate General for Competition of the European Commission. He worked on several cases involving merger notifications, state aid notifications, agreements between competitors, abuses of dominant position, and other anticompetitive practices.


English and Portuguese


American Chamber of Commerce (AMCHAM), Federal District
American Bar Association (ABA), Section of Antitrust Law

International Bar Association (IBA), Antitrust Committee
Brazilian Bar Association (OAB-DF), Competition Law Committee
World Services Group (WSG)
Brazilian Bar Association (OAB) – Federal District (Brasília)
Portuguese Bar Association (OAP) (inactive)


LL.M, Comparative Law, University of Miami – School of Law, United States 2003

LL.B, Faculdade Municipal de Direito de Franca, Franca-São Paulo, Brazil, 2001

Competition and Regulatory Law Course, University of Lisbon, Portugal, 2009

Lawyer Rankings

Brazil > Competition and antitrust

(Next Generation Partners)

Leonardo Maniglia DuarteVeirano Advogados

Veirano Advogados‘ competition department is highlighted for its ‘ability to provide pragmatic and robust guidance based on in-depth knowledge of relevant legal practice in Brazil‘. The group has broad experience in both merger control and antitrust investigations before CADE, with 2021 and 2022 seeing the firm handling a large number of merger review proceedings. In this space, it is also equipped to assist companies as third parties in challenges to merger transactions. Leonardo Maniglia Duarte, who has over 18 years of experience, leads the team from Brasília; Alberto Monteiro, who was promoted to partner in January 2022, is a name to note in São Paulo.