About
O'Farrell is a law firm of 13 Partners and 50 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, and Sebastian Luegmayer. - Managing Partner - Agustín Siboldi ### 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. ### Infrastructure Our infrastructure practice area is focused on working alongside our local and international clients in all stages of investment projects in infrastructure and industrial facilities, including risk management, negotiation and administration of relevant contracts, handling of claims and resolution of construction disputes through negotiation, mediation, or arbitration. ### 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. ### Languages - Spanish - English (fluent) - French ### Memberships - IBA (International Bar Association) - ABA (American Bar Association) - ISDA - IFA (International Fiscal Association) - AmCham American Chamber of Commerce - Association of International Petroleum Negotiators ### Staffing Figures - 53 Other fee-earners - 80 Total staff - 1 Manager - 2 Marketing and Communications - 2 Human Resources
Office locations
Buenos Aires
Buenos Aires
O’Farrell French 3155 Cp 1425awm, Caba Buenos Aires Argentina
Practice areas
Lawyers in this office
Agustín Siboldi
Agustín Siboldi, a Partner of the Public Law and Economic Regulation Area, specializes in Antitrust, Energy and Natural Resources, and Telecommunications. His practice focuses on the following areas in relation to economic regulation: antitrust, including economic concentrations and investigations in anticompetitive practices; telecommunications; exploration, concession, exploitation and transport of hydrocarbons; generation, transmission, distribution and commercialization of electricity; transport, distribution and commercialization of gas; commercialization of medicines; among other heavily regulated industries. · Competition/Antitrust
Ana Belén Micciarelli
Ana Belen Micciarelli is a Partner in the Public and Administrative Law area. She joined the firm in 2015. Ms. Micciarelli’s practice focuses on assisting clients operating in highly regulated markets -including energy, gas, mining, hydrocarbons, telecommunications and personal data-, as well as advising on public procurement (goods, services and public works), both in federal, provincial and municipal jurisdictions. She stands out for her experience in public and private infrastructure works and in sustainability matters. · Public & Administrative Law
Carla Irupé Martínez
Carla Irupé Martínez is a lawyer at the Corporate Law and Capital Markets Area. She joined the firm in 2024. · Corporate / M&A
Cecilia Cook
Ms. Cecilia Cook is Of Counsel within the Corporate Law Area. She joined O’Farrell in 1998 as an Associate and became a Partner in 2001. Between 2007 and 2013, she worked at Estudio Llerena and joined O’Farrell again as an Of Counsel in 2014. · Corporate / M&A
Ernesto Genco
Ernesto Genco joined the firm in May 2005 and has been a Partner of the firm since May 2014. His practice focuses on foreign investments, start-ups, joint ventures, reorganizations, M&A, corporate conflicts and general corporate advice to local and foreign clients in different industries, including companies listed in the Fortune 500 ranking. He coordinates Pro Bono cases of the firm. · Corporate / M&A
Federico Daurat
Federico Daurat is an associate of our Litigation Department. He joined O’Farrell in 1998. He specializes in Civil and Commercial Law. In this area of specialization, he mainly provides advice on legal and arbitration proceedings and all areas of commercial law, especially in distribution contracts · Litigation
Fernando Reto
Fernando Reto Reynal is a lawyer member of the Labor and Employment Law Area. He joined O’Farrell in 2018. His practice focuses on advising companies, settling labor disputes, whether individual or collective and managing labor proceedings. · Labor & Employment
Francisco Astolfi
Francisco M. Astolfi has been a Partner at O'Farrell since 2013 and leads the Civil and Commercial Litigation Department. · Dispute Resolution
Guillermo Lalanne
Guillermo joined O’Farrell in 1999 and since 2007 he´s been is a Partner of the Tax Law Department. His main areas of practice are constitutional tax law and complex tax litigation, with focus on national tax law and local taxes. · Tax
Gustavo Enrique Müller
Gustavo E. Müller is the lawyer in charge of the International Trade and Customs Law Area. His activity is focused on international trade and customs law, antidumping and regulation of international trade. Mr. Müller advises, represents and sponsors leading automotive, energy, food, chemical and supermarket companies, among others, as regards the import and export of goods and services, foreign exchange, promotional regimes, Duty Free Areas, Special Customs area and dumping issues, etc. · International Trade & Customs
Ignacio Agustín Castiglione
Ignacio Castiglione is Partner of the Labor and Social Security Department. He joined O’Farrell in 2011. His activity focuses on preventive counseling and the resolution of labor disputes, whether individual or collective, negotiation of collective bargaining agreements with labor unions, managing labor complex proceedings and labor counseling in mergers and acquisitions proceedings. Ignacio advises companies related with diverse activities such as automotive, power, gas, textile, tourism, IT, insurance, pharmaceutical, retail, construction, and telecommunications, among others. · Labor & Employment
Jorge Luis Ariza
Jorge Luis Ariza is the Partner leading the “infrastructure” practice area, providing his experience in international investment projects in the energy and natural resources sector and in other economic activities that require construction projects of industrial facilities under private management schemes. · Infrastructure
Jorge Muratorio
Jorge Muratorio, is the Partner in charge of Public Law and Economic Regulation Department at O´Farrell. His practice focuses on constitutional, administrative and environmental law, urban planning regulations, consumer protection law and antitrust. · Administrative Law
José Luis Zapata
José Luis Zapata is the Partner in charge of the Labour Law and Employment Area at O´Farrell. He has been a Partner since 2005 and he has led the area since then. · Labour & Employment
Juan Matienzo
Juan Bautista Matienzo joined O’Farrell in 1996 and is a lawyer in the Litigation Department. He has worked in O’ Farrell advising several companies of various issues (contracts, tax, business affairs, guarantees). Concurrently, he was in charge of the supervision and general management of more than two thousand trials in civil, commercial, tax and contentious-administrative matters, pending before courts of the City of Buenos Aires and various provinces in Argentina. He is currently in charge of a large litigation portfolio in civil and commercial matters, pending before courts of the City of Buenos Aires and various provinces in Argentina. · Litigation
María Celina Valls
Celina Valls is a Partner at O'Farrell's Tax Department. She joined the firm in 2006. She leads complex tax disputes relating to international and national taxation matters. She is in charge of litigations related to transfer pricing. In addition, she advises both local and foreign companies on international, national and local taxation. · Tax
María Fortuna
María Fortuna joined O’Farrell in 2019 and is a member of the Public Law and Economic Regulation Area. Her practice focuses on public services matters, public contracts and litigation. Furthermore, her areas of expertise are environmental law, exploration, concession, exploitation and transportation of hydrocarbons; generation, transport, distribution and commercialization of power; transportation, distribution and commercialization of gas. · Public Law
María Sol Acuña
Maria Sol is a member of the Consumer Law and Electronic Commerce. She joined O’Farrell in February 2023. She is currently pursuing a Computer Law Specialization. · Consumer Law
Miguel Tesón
Miguel A.M. Tesón is the Partner in charge of the Tax Law Department. He joined the firm in 1989. · Tax
Nadia Antonini
Nadia Antonini is an Associate of our Customs and International Trade Area. She joined the firm in 2022. Ms. Antonini has worked professionally in the legal areas of importing companies as an advisor on customs and administrative procedures. · International Trade
Pilar Magallanes
Yésica Pilar Magallanes is a lawyer in our Consumer Law and Electronic Commerce area. She joined O’Farrell in 2021. · Consumer Law
Rebeca Fernández
Rebeca is an Associate in the Public Law and Economic Regulation Area. She joined the firm in 2016. · Public Law
Sebastián Luegmayer
Sebastian Luegmayer has been a Partner of the firm since 2014. His practice areas are Corporate Law, Finance Law and Capital Markets. He focuses on corporate finance, domestic and international debt, equity offerings, derivatives and structured products, project finance, exchange control regulation and general corporate law. · Corporate / M&A
Uriel F. O’Farrell
Uriel F. O’Farrell, Honorary Partner of O’Farrell, is specialized in corporate law, mergers & acquisitions, and energy (transactions, regulation and litigation). · Corporate / M&A