Marcio Soares > Mattos Filho > Rio de Janeiro, Brazil > Lawyer Profile
Mattos Filho Offices

Praia do Flamengo, 200 11º andar
Rio de Janeiro, RJ , CEP 22210-901
Brazil
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Marcio Soares

Work Department
Antitrust / Corporate Investigations
Position
Partner
Career
Marcio has extensive experience in competition matters, representing domestic and foreign clients from various sectors of the economy in approving corporate transactions (mergers) 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 agreements 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 a member of the International Committee of the Antitrust Section of the American Bar Association (ABA). He 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.
Languages
Portuguese and English
Memberships
Co-Chair of the Cartels Working Group at the Antitrust Committee of the International Bar Association (IBA); Member of the Brazilian Institute of Competition, Consumer Affairs and International Trade Law Review (IBRAC)
Education
Bachelor of Laws – Universidade do Estado do Rio de Janeiro
Postgraduate Degree in Private Law – Universidade do Estado do Rio de Janeiro
Master of Laws (LL.M.) – Columbia Law School
Lawyer Rankings
Brazil > Competition and antitrust
(Leading partners)Noted for its ‘knowledge of the industry and recent decisions by CADE‘, the ‘highly qualified, objective and accessible‘ antitrust practice at Mattos Filho is a key port of call for domestic and international heavyweights from the worlds of energy, telecoms, technology, life sciences and financial services, among other sectors. Covering the entire spectrum of competition law matters, the team particularly stands out for its proficiency in complex merger control proceedings; conduct matters, including high-profile cartel and dominance investigations, as well as leniency negotiations, antitrust compliance and lawsuits involving competition issues are other key areas of activity for the department. Marcio Soares is a name to note in the Rio office who maintains a broad practice covering merger reviews, investigations into anti-competitive conduct, antitrust lawsuits and compliance. Based in São Paulo, Lauro Celidonio Neto and Renata Fonseca Zuccolo Giannella have negotiated hundreds of M&A transactions before CADE, and are also well placed to undertake behavioural work. In the same office, Michelle Machado often acts in merger control and leniency negotiations, while associate Ana Carolina Bittar is particularly skilled in unilateral conduct matters and cease-and-desist agreements (TCCs). A key driver behind the firm’s competition practice in Brasília, Eduardo Frade draws on his former experience at several public management agencies to advise clients on merger clearances, cartels, abuse of dominant position cases and antitrust compliance.
Lawyer Rankings
Top Tier Firm Rankings
- Banking and finance
- Capital markets
- Competition and antitrust
- Compliance
- Corporate and M&A: High-end
- Tax > Customs
- Dispute Resolution: Arbitration
- Dispute Resolution: Litigation
- Energy and natural resources > Electricity (and renewable energy)
- Tax > Tax litigation
- Energy and natural resources > Hydrocarbons
- Insurance
- Labour and employment
- Tax > Tax litigation
- City focus - Brasilia > Litigation
- Projects and infrastructure
- City focus - Brasilia > Public law and regulation
- Real estate
- City focus - Brasilia > Tax
- Tax > Tax advisory
- Tax > Tax litigation
- TMT: Cybersecurity and data privacy
- TMT: Tech, innovation and digital business
- Wealth and succession planning
- White-collar crime and investigations