Firm Profile

O'Farrell

Latin America Guide 2025

Ranked departments
Ranked lawyers
Latin America

Contact number

+54 11 4346 1000

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About

Provided by O'Farrell
Latin America

O'Farrell is a law firm of 14 Partners and 55 Lawyers with a clear business vision. The firm provides comprehensive advice across multiple practice areas and builds multidisciplinary teams to respond to complex challenges in an innovative and creative way.

O'Farrell provides legal services in all areas involved in the successful management of clients’ businesses. From corporate and financial structuring to labor, tax, and arbitration advice, including all matters related to business management.

Due to the firm's vast experience and prestige, O'Farrell are referents in legal matters; the firm is listed in the world’s most prestigious rankings and has an impressive portfolio of national and international clients.

The firm are a team of people who are passionate about what they do and, above all, put the focus on people, understanding that service excellence is much more than a competent advice.

Management Committee

Miguel A M Tesón, José Luis Zapata, Jorge Muratorio, Valeria Estathio and Sebastian Luegmayer.

Main Areas of Practice:

Corporate & M&A:

This firm is one of the most experienced in Argentina and provides legal advice in deals with highly complex structures, involving multiples jurisdictions, private and public offerings. They have a vast experience in M&A and spin-off processes participating in the most important transactions in the last decades, and particularly, in the recent years, in the energy sector (oil & gas, utilities and power industry).

Energy & Natural Resources:

The firm is a leader in this field due to its long standing and strong expertise, involving upstream and downstream oil and gas industry, chemical as well as traditional, and renewable power generation, transportation, and distribution. The firm is strongly involved in the restructuring of the Argentine energy matrix: advising its clients in the fire power and renewable generation auctions, and in the acquisition of important energy assets by leading companies.

Banking & Finance:

The firm advises on banking laws and financial regulations. O’Farrell has been involved in the largest and most innovative placement of securities by, amongst other, the largest Argentine company and financial entities. The firm renders advice in relation to international project financing, loans, structured products, and derivatives.

Telecommunications, Media & Entertainment:

This team is recognized as one of the most experienced in this practice area. The firm has a strong track record in the development of telecom infrastructure, e-commerce, applications, and content generation, advising one of the leaders in the internet payment sector, and famous sportsmen involved in worldwide gaming applications.

Agribusiness:

The firm advises world's leading agribusiness companies: biotechnology (seeds), fertilizers and pesticides, agribusiness equipment manufacturers; it has been involved in relevant M&A transactions conducted in the last decade.

Regulatory, Administrative & Constitutional Law:

This practice is based in a well acknowledged team, allowing the firm to be deeply involved in advising its clients in heavily regulated markets: pharmaceutical retail, laboratories, highways and infrastructure concessions, public utilities, public and private transport, public procurement, auctions, environmental law, and administrative, judicial, and constitutional legal proceedings.

Competition/Antitrust:

The firm plays an important and leading role in antitrust matters; both in comprehensive assistance related to the merger control proceedings as well as in proceedings related to business conduct allegedly violating antitrust rules. The firm represents leader companies in the following sectors: oil and gas, retail, telecom, automotive, e-commerce, transport, biotech, agribusiness, among others.

Tax:

The firm has a unique team of lawyers dedicated to complex tax lawsuits with strong expertise in disputes before the Federal Supreme Court. The tax team provides advice in relation with fiscal structuring, financial and technical transference agreements, and recognition of tax benefits.

Labour & Employment:

O’Farrell provides complete counsel and legal representation both at administrative and judicial level, through a highly specialized team. It provides committed follow up and relevant and detailed information, key to manage human resources assets and contingencies.

Pharmaceutical & Health:

The firm holds comprehensive legal advice to one of the largest health care groups in Argentina. It also provides legal consultancy to the most important pharmacy group in Latin America.

Compliance:

Advice to local and foreign clients in the design, implementation, audit, and training of their compliance programs to adapt them pursuant to Argentine laws and the recent Corporate Criminal Liability Act, as well as assistance in administrative or judicial proceedings related to these matters.

Pro Bono:

O’Farrell is cofounder of the Pro bono Commission created in December 2000 by the City of Buenos Aires Bar Association, providing pro bono advice to individuals, NGOs, and other social organizations.

Ranked Offices

Provided by O'Farrell

Argentina - Head office

O'Farrell rankings

Latin America Guide 2025
Filter by
Band
Argentina
Banking & Finance
1 Ranked Lawyer
Lawyers
Sebastián Luegmayer
4
Sebastián Luegmayer
Head of Banking & Finance
4
Band 4
Competition/Antitrust
1 Ranked Lawyer
Lawyers
Agustín Siboldi
3
Agustín Siboldi
3
Band 3
Corporate/M&A
1 Department
Department
Corporate/M&A
5
Corporate/M&A
5
Band 5
Energy & Natural Resources: Oil & Gas
1 Ranked Lawyer
Lawyers
Uriel F O'Farrell
4
Uriel F O'Farrell
Head of Energy & Natural Resources: Oil & Gas
4
Band 4
Energy & Natural Resources: Power
1 Department
2 Ranked Lawyers
Department
Energy & Natural Resources: Power
1
Energy & Natural Resources: Power
1
Band 1
Lawyers
Uriel F O'Farrell
E
Uriel F O'Farrell
E
Eminent Practitioners
Agustín Siboldi
1
Agustín Siboldi
Head of Energy & Natural Resources: Power
1
Band 1
Labour & Employment
1 Department
2 Ranked Lawyers
Department
Labour & Employment
3
Labour & Employment
3
Band 3
Lawyers
José Luis Zapata
2
José Luis Zapata
Head of Labour & Employment
2
Band 2
Ignacio Castiglione
U
Ignacio Castiglione
U
Up and Coming
Public Law
1 Department
1 Ranked Lawyer
Department
Public Law
4
Public Law
4
Band 4
Lawyers
Jorge Muratorio
2
Jorge Muratorio
Head of Public Law
2
Band 2
Tax
1 Department
4 Ranked Lawyers
Department
Tax
2
Tax
2
Band 2
Lawyers
Guillermo A Lalanne
2
Guillermo A Lalanne
2
Band 2
Miguel Alejandro Máximo Tesón
2
Miguel Alejandro Máximo Tesón
Head of Tax
2
Band 2
Valeria Estathio
3
Valeria Estathio
3
Band 3
María Celina Valls
4
María Celina Valls
4
Band 4
TMT (Telecoms, Media, Technology)
1 Department
1 Ranked Lawyer
Department
TMT (Telecoms, Media, Technology)
2
TMT (Telecoms, Media, Technology)
2
Band 2
Lawyers
Agustín Siboldi
2
Agustín Siboldi
Head of TMT (Telecoms, Media, Technology)
2
Band 2
Other Lawyers
Lawyers
Ernesto Genco
Unranked

Articles, highlights and press releases

12 items provided by O'Farrell