LAWYER PROFILE
Grenfel S Calheiros

Grenfel S Calheiros

Global 2026

Chambers ranking badge
Share profile
Chambers ranking badge
Simpson Thacher & Bartlett LLP
 Simpson Thacher & Bartlett LLP

Ranked in 2 practice areas

Capital Markets (International Firms)

Brazil

4 years ranked

Corporate/M&A (International Firms)

Brazil

3 years ranked

About

Provided by Simpson Thacher & Bartlett LLP

Global

Practice Areas

Head of the Firm’s São Paulo office, Grenfel Calheiros advises clients on M&A and capital markets transactions, with a primary focus on Latin America and especially Brazil. His clients have included a range of leading companies, private equity sponsors and investment banks in cross-border acquisitions, securities offerings and other complex corporate matters. Grenfel spent the first nine years of his career in Simpson Thacher’s New York office. He is fluent in Portuguese.

Personal

LLM, University of Chicago (2003); JD Equivalent, University of São Paulo (2000).

Chambers Review

Provided by Chambers

Chambers Global Guide

Capital Markets (International Firms) - Brazil

Band 1
Individual Editorial

Brazilian partner Grenfel Calheiros maintains a widely respected capital markets practice advising on foreign law aspects of major equity deals in and outside Brazil. He leads the firm's São Paulo office and is admired by clients, who laud his deal-making talents and his extensive US experience, which allow him to overcome cultural and regulatory differences and work as a bridge for investors.

Learn more about this teamView ranking table

Corporate/M&A (International Firms) - Brazil

Band 3
Individual Editorial

Grenfel S Calheiros is sought after for his demonstrated skills assisting clients with cross-border M&A mandates. The São Paulo-based partner has additional capabilities in dealing with capital markets issues.

Learn more about this teamView ranking table

Strengths

Provided by Chambers

  • Grenfel Calheiros is well equipped, fast and assertive. We work well together.

    Capital Markets (International Firms)Chambers Global Guide

  • Grenfel is the name. We enjoy working with him – he’s highly technical and has a strong understanding of Brazil. He navigates the Brazilian market very well.

    Capital Markets (International Firms)Chambers Global Guide

  • Grenfel is the main point of reference of Simpson Thacher in Brazil. He is one of the best lawyers in the Brazilian market.

    Capital Markets (International Firms)Chambers Global Guide

  • Grenfel Calheiros is a gentleman and very sophisticated. He can solve any problem.

    Capital Markets (International Firms)Chambers Global Guide

  • Grenfel S Calheiros is very easy to work with as he is an aggregator. He has strong knowledge of Brazil and its market players.

    Corporate/M&A (International Firms)Chambers Global Guide

  • Grenfel is an excellent professional, who has good technical knowledge and experience.

    Corporate/M&A (International Firms)Chambers Global Guide

Ranked Individuals at Simpson Thacher & Bartlett LLP (111)

Belgium

Brazil

China

Japan

Latin America - International Counsel

What success is built on

Chambers is the leading data and intelligence partner for the legal sector.

Explore thought leadership