The Legal 500

Twitter Logo Youtube Circle Icon LinkedIn Icon
Work +54 11 434 610 00
Fax +54 11 433 446 55

Uriel O'Farrell

Work +541143461000
Estudio O'Farrell

Work Department

Corporate & M&A - Banking & Finance -  Energy & Natural Resources


Uriel F. O´Farrell, Estudio O´Farrell’s Senior Partner practice focuses on corporate work, mergers & acquisitions and energy transactions regulation and disputes.


During 1978 Mr. O´Farrell worked in Ford Motor Company Legal Department (Dearborn Michigan, USA).

Mr. O´Farrell advised numerous domestic and foreign companies in corporate matters and in the energy and infrastructure sectors including oil production and exploration; natural gas production and distribution and electricity generation, transmission, marketing and distribution. In the above mentioned areas he has participated in large mergers and acquisitions (M&A) and privatizations transactions, financing, regulatory advice, litigation and arbitration including investment treaty arbitration.

Among others, Mr. O´Farrell has advised Pampa Energía S.A., and its electricity distributors and power generating companies as well as The National Grid Co. Plc, Duke Power, the Uruguay electricity and gas utilities (UTE), EXXON, Gas Natural SDG, Suez, ENI S.p.A. (Italy) and YPF S.A. and Compañía General de Electricidad.


Spanish, English and French.


He is a member of the International Bar Association, Section of Energy and Natural Resources Law Vice Chairman Power Law Committee.


Mr. O´Farrell has a law degree (Abogado) from Facultad de Derecho y Ciencias Sociales de la Universidad de Buenos Aires (School of Law of the University of Buenos Aires). He was admitted to the Buenos Aires Bar in Argentina in 1977.

He attended the Academy American and International Law, The Southwestern Legal Foundation (Dallas, Texas, USA) in 1988.


Banking and finance

Within: Banking and finance

With a ‘strongly professional group’, Estudio O'Farrell strikes the right note with its ‘speedy and accurate advice’. Under the leadership of Uriel O’Farrell, the team is well known for its specialist experience in in advising issuers on debt offerings. As a case in point, O’Farrell recently acted in conjunction with the ‘responsive and knowledgeable’ Sebastián Luegmayer to assist national oil company YPF with a $750m international notes offering. The group also advises John Deere Credit Compañía Financiera on its debt offerings. Foreign exchange regulations, debt restructurings and project finance are also notable areas of activity.

[back to top]

Corporate and M&A

Within: Corporate and M&A

The ‘resourceful team’ at Estudio O'Farrell is commended for ‘taking the time to understand the client’s business’. The group is particularly recognised for its strong profile in energy matters (largely due to the firm’s close relationship with YPF), but it is also routinely involved in deals in the agribusiness and infrastructure areas. Recent work saw practice co-heads Ricardo Castañeda and Uriel O´Farrell pair-up to advise YPF and YPF Energía Electrica on a $275m subscription agreement with EFS Global Energy and GE Capital Global Energy Investments. The team also includes Ernesto Genco, who has a ‘great business mind’.

[back to top]

Argentina: Energy and natural resources


Within: Leading lawyers

Uriel O’Farrell - Estudio O'Farrell

Within: Electricity

Estudio O'Farrell’s practice, which demonstrates broad capability in both regulatory and transactional matters, is commended for its ‘strong commitment to the client’. The ‘creative and problem-solving’ team is led jointly by the ‘very experienced’ Uriel O´Farrell and economic regulation specialist Agustín Siboldi; it also benefits from the senior experience of ‘fantastic administrative law partner’ María Agustina Fanelli Evans and Fernando Raúl García Pullés. Recent highlights include advising Argentina’s largest electricity distributor, Edenor, on the renegotiation of the electricity distribution concession agreement for the City of Buenos Aires and the north of Buenos Aires province. It is also assisting Pampa Energía with the auction proceedings for three new power electricity generation plants. Compañía General de Electricidad, Energy Consulting Services and YPF Energía Electric are also on the department’s books.

[back to top]

Oil and gas

Within: Oil and gas

Estudio O'Farrell’s oil and gas practice, which sits within the firm’s public law and economic regulation department, has a strong focus on regulatory and contentious issues. Led jointly by Uriel O´Farrell and Agustín Siboldi, the team covers a wide range of upstream and downstream matters including exploration, transportation and distribution. The firm’s strong links to YPF ensures key roles on major projects and in one notable mandate it is representing YPF on its joint venture with Petronas to develop the La Amarga Chica concession. The group also recently advised Gas Natural Ban on the renegotiation of the license agreement for natural gas distribution in Buenos Aires and the north of Buenos Aires province.

[back to top]

Back to index

Legal Developments worldwide

Legal Developments and updates from the leading lawyers in each jurisdiction. To contribute, send an email request to