Partner Profile

Marcel Medon Santos

TozziniFreire Advogados


LL 250


Practice areas

Antitrust and compliance and investigation.

Professional memberships

Member of the Competition Commission at the Brazilian Bar Association, São Paulo section.


Partner since 2014. Marcel has solid expertise in the private practice, assisting clients with risk assessment of business practices, investigation of conducts, merger review and implementation of corporate compliance programmes. He was director of the Secretariat of Economic Law for six years. He was one of the officials responsible for the implementation of the modern investigation techniques currently used by the Brazilian Competition Protection System.


Postgraduate antitrust law: FGV/SP. Graduate, Law School of PUC-SP (Pontifícia Universidade Católica de São Paulo).


Recognised as a leading antitrust lawyer in Brazil by Chambers Latin America, Who’s Who Legal, The Legal 500, Latin Lawyer 250 and Análise Advocacia 500, among other relevant international legal guides.


"Controle Externo e Franquias: O Caso Chilli Beans" (co-author). In Jurisprudência do CADE Comentada. São Paulo: Revista dos Tribunais, 2019.

"Brazil" chapter (co-author). In Getting the Deal Through - Merger Control. London: Global Competition Review, 2019.

"Competition Law in Brazil" chapter (co-author) in Competition Law in Latin America. Alphen aan den Rijn: Wolters Kluwer, 2016.

“Content and Logical Structure of the Article 20 of Statute 8.884/94 (Antitrust Law)”. Revista Direito GV, São Paulo, Jan–Jun 2008.

Language: English.

Office: São Paulo

[email protected]

Get unlimited access to all Latin Lawyer content