Charles Gruenberg

Charles Gruenberg

Practice Areas


Agribussines, Banking and Finance, China Desk, Litigation and Conflict Resolution, Strategic Litigation in Higher Courts, Complex Contracts and Negotiations, Bankruptcy and Restructuring, Management of Legal and Arbitration Assets and Credit Rights, Infrastructure, Restructuring of Debts and Credits.


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.


Análise Advocacia 500 – Arbitration (2018 and 2019).

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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