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Marval advises Petronas on the sale of its upstream operations in Argentina to Vista Energy
Doing Business in Argentina 2025
Marval is the Argentine law firm advising the largest Latin American companies in 2024
Marval advises on the issuance of trust securities "Mercado Credito XXXIV".
Marval advises on the incorporation of the Elebar IX financial trust
Marval O’Farrell Mairal
Total number of Partners: 68 partners
Total number of lawyers: +200 lawyers
Firm Profile
Founded in 1923, Marval O’Farrell Mairal is the largest law firm in Argentina and one of the leading law firms in Latin America. With more than 100 years of history, we provide sophisticated advice to national and international clients.
We are the leading law firm in Argentina with more than three hundred lawyers with extensive experience in highly demanding matters and complex international transactions. This experience and strength allow us to react with speed and to participate simultaneously in large, complex and demanding negotiations, without compromising our quality of service.
Marval O’Farrell Mairal has a strong focus on cutting-edge corporate and financial transactions and the largest litigation and arbitration practice in the country. Moreover, our Intellectual Property Department is a leader in its field. We also lead other practice areas, including tax, fintech, employment law, competition law, energy and natural resources, compliance, anti-corruption and investigations, public and administrative law, insurance and reinsurance, telecommunications, media and technology, and real estate and construction.
All our working groups are led by highly experienced partners and experts and are formed according to our clients’ objectives.
Our History
The Firm’s beginnings date back to 1923, in the early years of the second radical government. At that time, the renowned Saenz Peña Law, which established universal, secret and mandatory voting, had been in existence for more than 10 years. In that context, the brothers Juan and Enrique de Marval met and created what would later become the largest law firm in Argentina. However, it initially emerged as an agency specialized in intellectual and industrial property matters.
In the early years, Estudio Marval overcame local and international crises, such as the stock market crash of 1929, the outbreak of World War II and multiple changes of government in the country. Already 15 years old and thanks to the arrival of Jorge E. O’Farrell, in 1938, the firm had a new name: Marval & O’Farrell. His arrival prompted the creation of the firm’s legal department, which allowed for the expansion of its practice areas. In particular, Jorge E. O’Farrell focused on the areas of business law, with special emphasis on general commercial law, tax law and industrial property law.
The incorporation of the legal wing, together with the ability of the members of the Firm to communicate fluently with its client portfolio in English, French and German, consolidated the international recognition of the Firm and its position as one of the most prestigious in the country and in the region. The expansion was such that, in 1962, it had to move from the emblematic Shell building at 788 Roque Sáenz Peña Avenue to the building at 887 Carlos Pellegrini Street.
In 1991, the firm obtained its current name, due to the incorporation of Dr. Héctor A. Mairal. Thus, the firm was renamed Marval O’Farrell Mairal.
Its relationship with international law firms was consolidated over the years. Marval O’Farrell Mairal has maintained and continues to maintain close relationships with the main law firms in the United States, Europe and Latin America.
Five years after Héctor Mairal’s arrival, the firm left the Carlos Pellegrini offices to move to 928 Leandro N. Alem Avenue. The growth of Marval O’Farrell Mairal inspired in 1997 the creation of a successful Young Professionals program, which has trained more than 500 young lawyers, and is still in place today. In 2001, he became an active member of the Pro Bono and Public Interest Committee of the Buenos Aires Bar Association.
Since its inception, the firm has managed to overcome the country’s major historical adversities. After the 2001 crisis, its team grew by approximately 150% and, by 2007, it extended its head office to the building at Reconquista 823. Marval O’Farrell Mairal maintained its headquarters at Alem and Reconquista Streets for 10 years. Finally, in 2016 it was again integrated into a single central office. This is located in Alem 882, right in the heart of the city of Buenos Aires.
In 2017, Marval O’Farrell Mairal strengthened its cultural values and its support for art by launching MarvalArt, a temporary art exhibition to showcase the work of these artists. This initiative is closely related to the Pro Bono area, since an important percentage of the sales of the works is destined to sponsor one of the NGOs that the firm regularly advises.
Marval O’Farrell Mairal has grown considerably in recent years and currently has more than 300 professionals. It offers a wide range of legal services to local and foreign commercial and investment banks, leading local and multinational companies, public sector clients and international lending agencies.
Over the years, the firm has received multiple awards, such as the Argentina Law Firm of the Year award from Who’s Who Legal, the Managing IP Law Firm of the Year and several Latin Lawyer Deal of the Year awards. In addition, it received the most important award in the legal field: the award for the best law firm in Latin America granted by Chambers & Partners.
Through the talent, dedication and commitment of its professionals, Marval O’Farrell Mairal has generated a unique network that places the Firm as one of the most prestigious worldwide.
• Administrative
• Aeronautical
• Agriculture
• Antitrust
• Arbitration
• Capital Markets
• Companies
• Competition
• Compliance
• Consumer
• Corporate
• Corporate Crime
• Corporate Law
• Customs
• Employment
• Energy
• Environment Law
• Family
• Financial Restructuring and Insolvency
• Fintech
• Foreign Investment
• Health
• Insurance
• Intellectual Property
• International Trade
• Investigations
• Labor
• Life Sciences
• Litigation
• Maritime Law
• Natural Resources
• Privacy
• Private Equity
• Project Finance
• Public Law
• Tax
• Technology
• Telecomms
Partner
Litigation
Partner
Banking and Finance, Gas, Oil
Partner
Compliance, Corporate Crime, Intellectual Property, Investigations, Litigation
Partner
Corporate
Partner
Banking and Finance
Partner
Intellectual Property, Patent
Partner
Banking and Finance, Corporate Law
Partner
Intellectual Property, Litigation, Privacy, Technology
Partner
Corporate Law, Mergers & Acquisitions, Private Equity
Partner
Employment, Labor
Partner
Arbitration, Aviation, Insurance, Litigation
Partner
Employment, Labor
Partner
Administrative, Public Law
Partner
Intellectual Property, Patent, Trademarks
Partner
Arbitration, Consumer, Litigation
Partner
Arbitration, Litigation
Partner
Arbitration, Consumer, Litigation
Partner
Tax
Partner
Energy, Environment Law, Gas, Natural Resources, Oil
Partner
Banking and Finance, Capital Markets
Partner
Banking and Finance, Capital Markets, Corporate, Financial Restructuring and Insolvency
Partner
Administrative, Energy, Natural Resources, Public Law
Partner
Corporate, Tax
Partner
Labor
Partner
Corporate Crime, Intellectual Property, Litigation, Privacy, Technology, Telecomms, White Collar
Partner
Administrative, Corporate, Mergers & Acquisitions, Public Law
Partner
Banking and Finance, Capital Markets, Corporate, Mergers & Acquisitions, Real Estate & Construction
Partner
Intellectual Property, Patent
Partner
Copyright, Intellectual Property, Trademarks
Partner
Employment, Labor
Partner
Banking and Finance, Capital Markets, Corporate, Technology, Telecomms
Partner
Labor
Partner
Intellectual Property, Trademarks
Partner
Banking and Finance, Capital Markets, Corporate, Fintech
Partner
Customs, International Trade, Tax
Partner
Arbitration, Litigation
Partner
Arbitration, Litigation
Partner
Arbitration, Consumer, Environment Law, Insurance, Litigation
Partner
Energy, Mining Law, Natural Resources
Partner
Tax
Partner
Banking and Finance, Capital Markets, Corporate, Financial Restructuring and Insolvency, Mergers & Acquisitions
Partner
Energy, Mining Law, Natural Resources
Partner
Data Protection, Intellectual Property, Technology, Transactional
Partner
Tax
Partner
Mergers & Acquisitions
Partner
Administrative, Anticorruption, Compliance, Investigations, Public Law
Partner
Corporate, Mergers & Acquisitions
Partner
Art, Health, Intellectual Property, Patent
Partner
Arbitration, Life Sciences, Litigation
Partner
Intellectual Property, Litigation, Privacy, Technology
Partner
Competition, Corporate
Partner
Corporate
Partner
Corporate
Partner
Corporate, Mergers & Acquisitions
Partner
Customs, International Trade
Partner
Arbitration, Insurance, Litigation
Partner
Agriculture, Corporate, Mergers & Acquisitions, Private Equity, Project Finance
Partner
Arbitration, Litigation
Partner
Banking and Finance, Capital Markets, Corporate Law, Financial Restructuring and Insolvency, Mergers & Acquisitions
Partner
Arbitration, Litigation
Partner
Labor
Partner
Banking and Finance, Capital Markets, Construction and Real Estate, Dispute Mediation Services, Restructuring, Society
Partner
Antitrust, Competition, Corporate
Partner
Arbitration, Litigation
Partner
Arbitration, Litigation
Partner
Banking and Finance, Corporate, Energy, Mergers & Acquisitions
Partner
Art, Copyright, Intellectual Property, Trademarks
Partner
Banking and Finance
Partner
Energy, Natural Resources
Partner
Tax
Associate
Senior Expert Associate
Tax
Associate
Associate
Associate
Associate
Arbitration, Consumer, Litigation
Associate
Arbitration, Consumer, Litigation
Associate
Corporate Law, Mergers & Acquisitions
Associate
Associate
Mergers and Acquisitions, Society
Associate
Mining Law
Associate
Associate
Mergers & Acquisitions, Society
Associate
Associate
Associate
Intellectual Property, Trademarks
Associate
Arbitration, Consumer, Litigation
Associate
Patent
Associate
Corporate
Associate
Associate
Associate
Insurance
Associate
Customs, International Trade
Associate
Intellectual Property, Trademarks
Associate
Corporate, Mergers & Acquisitions
Associate
Arbitration, Consumer, Litigation
Associate
Arbitration, Litigation
Associate
Tax
Associate
Associate
Associate
Associate
Associate
Banking and Finance
Associate
Patent
Associate
Associate
Banking and Finance
Associate
Banking and Finance
Associate
Associate
Family
Associate
Associate
Health
Associate
Associate
Mining Law
Associate
Associate
Associate
Corporate, Mergers & Acquisitions
Associate
Senior Expert Associate
Intellectual Property
Associate
Health, Life Sciences
Associate
Arbitration, Litigation
Associate
Banking and Finance
Associate
Associate
Associate
Intellectual Property
Associate
Associate
Corporate, Mergers & Acquisitions
Associate
Associate
Tax
Associate
Associate
Corporate, Mergers & Acquisitions
Associate
Associate
Associate
Banking and Finance
Associate
Associate
Health, Life Sciences
Associate
Intellectual Property
Associate
Banking and Finance
Associate
Corporate, Mergers & Acquisitions
Associate
Associate
Arbitration, Litigation
Associate
Banking and Finance
Associate
Associate
Associate
Associate
Employment, Labor
Associate
Mergers and Acquisitions, Society
Associate
Associate
Intellectual Property
Associate
Intellectual Property, Trademarks
Associate
Corporate Crime, White Collar
Associate
Associate
Associate
Fintech
Associate
Associate
Associate
Associate
Mergers & Acquisitions, Society
Senior Expert Associate
Energy, Environment Law, Natural Resources
Associate
Trademarks
Associate
Arbitration, Litigation
Associate
Antitrust, Competition, Corporate, Mergers & Acquisitions
Associate
Energy, Natural Resources
Associate
Arbitration, Litigation
Associate
Intellectual Property
Associate
Associate
Associate
Associate
Associate
Arbitration, Litigation
Associate
Arbitration, Litigation
Associate
Associate
Arbitration, Health, Life Sciences, Litigation
Associate
Associate
Competition, Mergers & Acquisitions, Society
Associate
Administrative, Anticorruption, Public Law
Associate
Arbitration, Litigation
Senior Expert Associate
Banking and Finance
Associate
Associate
Corporate, Mergers and Acquisitions
Associate
Banking and Finance
Associate
Associate
Associate
Associate
Energy, Environment Law, Gas, Natural Resources, Oil
Associate
Associate
Associate
Associate
Associate
Associate
Corporate
Associate
Banking and Finance
Associate
Tax
Associate
Customs, International Trade, Tax
Associate
Associate
Banking and Finance
Associate
Associate
Associate
Arbitration, Litigation, Pro Bono
Associate
Administrative, Public Law
Associate
Family, Inheritance and Successions
Associate
Privacy
Associate
Associate
Associate
Arbitration, Litigation
Associate
Associate
Associate
Associate
Associate
Associate
Banking and Finance
Associate
Arbitration, Litigation
Associate
Arbitration, Litigation
Associate
Labor
Associate
Associate
Intellectual Property, Technology
Associate
Associate
Corporate, Mergers & Acquisitions
Associate
Corporate
Associate
Associate
Corporate, Mergers & Acquisitions
Associate
Associate
Associate
Corporate, Mergers & Acquisitions
Associate
Tax
Associate
Associate
Trademarks
Associate
Associate
Arbitration, Litigation
Associate
Arbitration, Litigation
Associate
Associate
Intellectual Property
Associate
Administrative, Public Law
Associate
Intellectual Property
Associate
Associate
Antitrust, Competition
Associate
Arbitration, Litigation
Associate
Associate
Banking and Finance
Associate
Associate
Anticorruption, Compliance, Investigations
Associate
Tax
Associate
Arbitration, Litigation
Associate
Intellectual Property
Associate
Labor
Associate
Administrative, Public Inquiries
Associate
Tax
Associate
Intellectual Property, Patent
Senior Expert Associate
Arbitration, Litigation
Associate
Associate
Commercial Law, Contract Law, Corporate, Mergers & Acquisitions
Associate
Arbitration, Litigation
Associate
Labor
Associate
Administrative, Public Law
Associate
Associate
Tax
Associate
Associate
Tax
Associate
Anticorruption, Compliance, Investigations
Associate
Employment, Labor
Associate
Intellectual Property, Privacy, Technology
Associate
Associate
Intellectual Property, Trademarks
Associate
Health
Associate
Air and Space Law, Arbitration, Insurance, Litigation, Maritime Law
Associate
Arbitration, Litigation
Associate
Associate
Arbitration, Litigation
Associate
Associate
Associate
Associate
Associate
Mergers and Acquisitions, Society
Associate
Associate
Banking and Finance
Associate
Administrative, Public Law
Associate
Associate
Associate
Associate
Associate
Associate
Mergers and Acquisitions
Associate
Consumer, Mergers & Acquisitions, Society
Associate
Associate
Media, Technology, Telecomms
Associate
Associate
Arbitration, Litigation
Associate
Mining Law
Associate
Patent
Associate
Corporate, Mergers & Acquisitions
Associate
Banking and Finance
Associate
Associate
Labor
Associate
Mergers and Acquisitions, Society
Associate
Corporate
Associate
Associate
Associate
Arbitration, Litigation
Associate
Associate
Administrative, Civil Law
Associate
Arbitration, Consumer, Litigation
Associate
Associate
Employment, Labor
Associate
Labor
Associate
Corporate
Associate
Banking and Finance
Associate
Associate
Arbitration, Defense, Litigation
Associate
Administrative, Public Law
Associate
Associate
Associate
Associate
Tax
Associate
Employment, Labor
Associate
Associate
Arbitration, Litigation
Associate
Arbitration, Litigation
Associate
Associate
Arbitration, Customs, Litigation
Associate
Arbitration, Litigation
Associate
Patent
Associate
Associate
Tax
Associate
Associate
Media, Technology, Telecomms
Associate
Associate
Health, Sanitary Registrations
Associate
Associate
Administrative, Anticorruption, Public Law
Associate
Arbitration, Litigation
Associate
Associate
Employment, Labor
Associate
Associate
Employment, Labor
Associate
Mergers and Acquisitions, Society
Associate
Associate
Corporate, Mergers & Acquisitions
Associate
Corporate, Mergers & Acquisitions
Associate
Associate
Tax
Associate
Associate
Associate
Administrative, Public Law
Associate
Labor
Associate
Artificial Intelligence, Private Clients
Associate
Competition and Antitrust
Associate
Administrative, Public Law
Associate
Associate
Associate
Administrative, Public Law
Associate
Tax
Associate
Associate
Patent
Associate
Administrative, Public Law
Associate
Associate
Tax
Associate
Associate
Associate
Gas, Oil
Associate
Privacy, Technology
Senior Expert Associate
Intellectual Property, Patent
Associate
Intellectual Property
Associate
Arbitration, Litigation
Associate
Corporate Crime
Associate
Employment, Labor
Associate
Associate
Banking and Finance
Associate
Arbitration, Litigation
Associate
Energy, Natural Resources
Associate
Arbitration, Litigation
Associate
Intellectual Property
Of Counsel
Aeronautical, Arbitration, Insurance, Litigation, Maritime Law
Competition / Antitrust / Litigation & Arbitration
Of Counsel
Senior Counsel
Corporate, Mergers & Acquisitions
Of Counsel
Gas, Oil
Telecomms
Banking and Finance, Capital Markets, Financial Restructuring and Insolvency
Tax
Of Counsel
Arbitration, Financial Restructuring and Insolvency, Litigation
Compliance, Anticorruption & Investigations / Corporate / M&A
Of Counsel
Customs, International Trade, Tax
Intellectual Property / Patents
Writting Center
Counsel
Banking and Finance, Commercial Law, Finance Law, Investment, Mergers & Acquisitions, Real Estate & Construction, Trusts
Of Counsel
Arbitration, Financial Restructuring and Insolvency, Litigation
Of Counsel
Banking and Finance, Customs, International Trade
Compliance, Anticorruption & Investigations / Corporate / M&A / Energy & Natural Resources
Banking & Finance / Capital Markets / Energy & Natural Resources / Insolvency & Restructuring / Oil & Gas
Marval is the Argentine law firm advising the largest Latin American companies in 2024
Av. Leandro N. Alem 882
(C1001AAQ) Buenos Aires
Buenos Aires, Argentina
(54.11) 4310.0100
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