Mattos Filho (Sao Paulo)

Marcio Soares

Mattos Filho (Sao Paulo)

Marcio Soares is a partner within the Antitrust Practice Group at Mattos Filho in Brazil. Marcio has extensive experience in competition matters, representing domestic and foreign clients from various sectors of the economy in approving corporate transactions before the Administrative Council for Economic Defense (Cade), as well as in investigations of anticompetitive conduct – especially cartels and abuse of dominant position –, negotiating leniency and cease-and-desist agreements (TCCs), antitrust lawsuits, competition compliance and general advice. Marcio serves as co-chair of the Working Group on International Cartels of the International Bar Association’s (IBA) Antitrust Committee and is also a board member of the Brazilian Institute for the Study of Competition, Consumption and International Trade (Ibrac). Marcio is a guest professor in Fundação Getúlio Vargas’s graduate program in Rio de Janeiro, and has written a number of articles on antitrust law published in Brazil and abroad.

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Mattos Filho (Sao Paulo)
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Mattos Filho (Sao Paulo)


1960 Bulletin

Lauro Celidonio Gomes dos Reis Neto, Renata Fonseca Zuccolo Giannella, Amadeu Ribeiro, Marcio Soares, Michelle Marques Machado The Brazilian Competition Authority implements measures in line with WHO recommendations against the spread of the COVID-19


The Brazilian antitrust authority has implemented measures in line with WHO recommendations against the spread of the COVID-19, and activities are being carried out without major impacts, although deadlines in conduct cases are now suspended and delays in certain matters cannot be altogether (...)

Amadeu Ribeiro, Marcio Soares, Felipe Rodrigues Caldas Feres, Giovani Loss, Nilton Mattos, Renata Fonseca Zuccolo Giannella The Brazilian Competition Authority enters into a settlement agreement with a major refining company for the sale of oil refineries (Petrobras)


During a hearing held on June 11, 2019, the Administrative Council for Economic Defense (CADE) entered into a Settlement Agreement with Petrobras for the sale of eight oil refineries and associated infrastructure. The agreement was approved by the majority of CADE’s Commissioners and has in (...)

Amadeu Ribeiro, Frederico Carrilho Donas, Marcio Soares The Brazilian Superior Court of Justice limits the confidentiality of the Brazilian Competition Authority’s leniency agreements (Εlectrolux)


The Brazilian Superior Court of Justice (“STJ”) has issued a ruling that seeks to limit the confidentiality of leniency agreements entered into with the Brazilian antitrust authority (“CADE”). Pursuant to the ruling, third parties may have access to such agreements and related materials (...)



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