Anna Cecilia Rostworowski da Costa Buff

Anna Cecilia Rostworowski da Costa Buff


Portuguese, English and French


Practice focused on M&A, including as head of due diligence procedures, in the draw-up and negotiation of SPAs and asset purchase agreements, shareholders’ agreements and others. Anna Cecilia advises foreign clients in asset purchases in Brazil, including with respect to foreign investments, draw-up of business contracts and organization of structured transactions. Anna Cecilia has also been part of the Public Law team of law firm Baker & McKenzie, in Paris, having advised both government agencies and private companies. Anna Cecilia has been listed as one of the leading Capital Market and M&A by Legal 500 and Chambers Latin America, and as Foreign Expert for France by Chambers, in 2018.


Master’s degree in Public Law of Economics
University Paris II – Pantheón-Assas (2007 - 2008)
Administrative Law Course
Brazilian Society of Public Law –São Paulo (2004)
Bachelor of Laws
Mackenzie Presbyterian University – São Paulo (2002)


International Bar Association, IBA (2018)
Brazilian Bar Association (OAB)
– Rio de Janeiro Chapter (2011)
– São Paulo Chapter (2002)


Business Fraud and the Law in Brazil: A Practical Guide to Advising and Defending Clients
in Global Business Fraud and the Law: Preventing and Remedying Fraud and Corruption, coord. Thomas E. Zeno, Rebekah J. Poston, Colin R. Jennings, Practising Law Institute (PLI); 1st edition; May 2015. Co-authors: Renato P. Stetner and Pablo Naves Testoni