Charles Gruenberg

Charles Gruenberg

Practice Areas

Arbitration, Civil, Commercial, , Contracts, Banking Law.


Phone number: +55 11 3847 3915


Mr. Gruenberg is a lawyer with extensive experience in the areas of civil law, commercial, banking and compliance. He is responsible for the litigation practice of the firm Leito, Tosto e Barros, as well as the area of arbitration. He has participated as a lawyer in more than 35 national and/or international arbitration proceedings, and has acted as arbitrator in other cases. He was the CEO and CFO of Leite, Tosto e Barros for eight years. He was a member of the Credit Commission of Febraban, an assistant professor of Civil Procedure at PUC-SP, vice president of the Arbitration Committee of OAB/SP and is currently vice president of the Chamber of Mediation and Arbitration of the Chamber of Commerce and Industry Brazil-China. Mr. Gruenberg joined Leite, Tosto e Barros in 1999 as an intern and became a partner in 2003. He was recognized by international publications for this outstanding work on banking law and litigation.


Client Choice – Recognized as the best Brazilian lawyer in Banking Law, awarded by the International Law Office, ILO (2014).

The Legal 500 – Dispute resolution: Litigation.

Educational Background

Master’s Degree in Commercial Law from Pontifícia Universidade Católica

Post-graduation in Civil Procedural Law from na Faculdade Autônoma de Direito de São Paulo – Fadisp.

Graduation in Law from Universidade Paulista – UNIP.

Other Activities

He is Currently vice president of the Mediation and Arbitration Chamber of the Brazil-China Chamber of Commerce and Industry (CAMCCIBC).

He was vice-president of the Mediation and Arbitration Committee of the Brazilian Bar Association, São Paulo Section (OAB/SP). He’s Also a state advisor to the same institution.

He was a State councilor of the Brazilian Bar Association.

He was assistant professor at PUC/SP, in the area of Civil Procedural Law.

He was a member of Febraban’s credit recovery subcommittee.


Portuguese, English, Spanish and Hebrew.
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