enes +5411 4346-1000

Sebastián Luegmayer


Phone +5411 4346-1045


Professional Experience

Sebastian Luegmayer has been a partner of the firm since 2014. His practice areas are Corporate Law, Finance Law and Capital Markets

Mr. Luegmayer gives advice to domestic and foreign companies as well as to financial institutions in relation to issues in the capital markets, project finance, mergers and acquisitions, and financial derivatives.

He advised YPF S.A., Argentina’s largest oil and gas company, on numerous debt issues both in domestic and international capital markets. In addition, he advised John Deere Credit Compañía Financiera S.A. on the creation of a $ 900,000,000 notes program and on the issue of debt securities in the Argentine capital markets. Moreover, Mr. Luegmayer gave legal advice on financial matters to Wells Fargo, Standard Chartered Bank, Societé Generale, ING Bank and Deutsche Bank AG.
Since 2006, he has counseled the International Swaps and Derivatives Association, Inc. (ISDA) on matters related to financial derivatives in Argentina. He is author of a legal opinion on netting for derivatives and repos, published by ISDA in April 2019.

During 2008, he acted as international associate at the New York office of Simpson Thacher & Bartlett LLP, participating in capital market, M&A, and financial derivatives transactions.


He is a lawyer graduated from the Law and Social Sciences School of Universidad de Belgrano, and he holds a Master’s Degree in Finance from Universidad del CEMA.


He has been recognized as an expert in his practice areas by the following international publications:

– Banking & Finance (Chambers & Partners 2019)

– Banking & Finance (Latin Lawyer 250, 2019)

– Banking & Finance (Legal 500, 2018)

– Banking & Finance (Leaders League, 2019)

Professional Entities and Associations

  • Member of the Customs and Finance Sub-Commission of the Corporations Chamber (Cámara de Sociedades Anónimas)
  • Member of the International Bar Association (IBA)
  • Member of the International Swaps and Derivatives Association (ISDA)
  • Member of ISDA Fintech Legal Group

Academic Work

Mr. Luegmayer is a post-graduate course professor at Universidad Católica Argentina and Universidad Austral.

Books and Articles

– Author of the book entitled “Contratos Bursátiles y Derivados Financieros”, Publisher Abeledo Perrot, 2010

– Author of legal opinion articles in Argentina and abroad on legal issues related to capital markets and financial markets.

  • “He is very attentive, responsive and aware of different stakeholders’ concerns”

    Chambers & Partners 2019
  • “ he is responsive and knowledgeable”

    Legal 500, 2018
  • Department co-head Sebastián Luegmayer receives praise from a client who states: “Sebastián is excellent, very constructive and helpful on complex transactions. He is also very commercial.”

    Chambers & Partners 2019