Tax

Marval O’Farrell Mairal

Client Satisfaction

Marval O’Farrell Mairal is called on by a blue-chip domestic and international client base for advice on sophisticated tax structures, complex cross-border transactions and high-profile tax litigation, particularly against the National Tax Authority. The team is also comfortable handling regional tax work across other Latin American jurisdictions, and works closely with peers in the firm’s corporate and M&A practices to advise on the tax aspects of M&A and private equity transactions in a range of sectors, including energy, agribusiness and natural resources. The practice is co-led by a quintet of highly experienced tax partners. The exceptional María Inés Brandt handles high-level tax planning and transactional work; Gabriel Gotlib is a market reference on international tax matters; Walter C. Keiniger is known for the strength and depth of his corporate taxation practice; Fernando Vaquero is a respected M&A tax practitioner; and Sergio Vergara, who was raised to the partnership in 2023, has a strong tax litigation practice. The partner team was recently further boosted with the promotion of corporate tax lawyer Luciana Virgile in August 2024. Other key names include outstanding tax and customs of counsel Horacio García Prieto, who brings decades of senior-level experience to the table, and associate María Paula Castelli (an expert in international tax), who leads a capable second line.

Legal 500 Editorial commentary

Testimonials

Collated independently by Legal 500 research team.

'A multidisciplinary term which provides coverage across several specialist tax areas. Gabriel Gotlib is excellent.’
‘Marval stands out, working to the highest international standards and responding with pace and sound judgement to queries.’
‘Walter Keiniger is approachable and responsive. He solves problems and his understanding and insights into our business are precious.’
‘Marval's team is interdisciplinary and can cover multiple technical aspects, including tax, customs, foreign exchange and litigation. Additionally, the team maintains a deep understanding of our business, practices and needs, which helps achieve better results. Finally, the team has agility and speed in responding, taking care of the details.'
'Clarity of thought and comprehensive vision that is unmatched in the market.’
‘Remarkable preparation and responsiveness. They give clients peace of mind.’
‘They stand out for the trust they generate with clients, their collaborative spirit, and high-quality service. A team that can think outside the box.'

Key clients

Mondelēz
TotalEnergies (Total Austral)
Stellantis Group
Meta Platforms
Banco Santander Río
Tata Consulting Services
WeWork
Vitol Group

Work highlights

Advising Stellantis Group on the tax aspects of a series of high-value investments in targets outside of its core business, including the acquisition of a minority stake in McEwen Copper.
Advising TotalEnergies on the tax aspects of an asset swap with Pampa Energía involving the purchase of the wind farm Mario Cebreiro and an assignment in a hydrocarbons concession in Rincón de Aranda, Vaca Muerta.

Lawyers

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