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Marval O'Farrell & Mairal

This firm appears in the Who's Who Legal 100 2014

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Marval O'Farrell & Mairal
Avenida Leandro N Alem 928
Buenos Aires
+54 11 4310 0100
+54 11 4310 0200

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Buenos Aires, Argentina

Avenida Leandro N Alem 928

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Marval O'Farrell & Mairal - The Who's Who Legal 100 2014

What is the Who's Who Legal 100?


For the ninth consecutive time Marval is recognised as our Argentina firm of the year. The firm has an “impressive standing” in the domestic legal market and in the wider Latin American region and  enjoys an “unsurpassed reputation” for providing “sophisticated legal advice”.

Banking 5 M&A 5
Capital Markets 4 Mediation 1
Commercial Litigation 1 Mining 1
Competition 2 Patents 3
Corporate Governance 4 Product Liability Defence 3
Corporate Tax 2 Project Finance 2
Energy 3 Public Procurement 4
Insurance & Reinsurance 1 Trade & Customs 3
Labour & Employment 2 Trademarks 3
Life Sciences 1


Marval is consistently involved in some of the largest and most complex financial transactions in Argentina. Chairman of the firm Alfredo O’Farrell has a broad practice including banking, corporate governance, M&A and competition law. Similarly, Santiago Carregal and Roberto Silva Jr each receive high praise in no less than five of our chapters including: banking, public procurement, capital markets, M&A and project finance. Carregal has “extensive experience” in matters relating to the capital markets and finance sphere and has represented companies and investment banks in more than 180 transactions. Silva’s “exceptional practice” focuses on privatisations, restructurings, foreign investments, capital market transactions, M&A, derivatives, securitisations, trusts and exchange controls. Also recognised in a multiple of fields is Héctor Mairal, who is an expert in dealing with company mergers, purchases and sales of banks, property development projects, formation of temporary business alliances, business contracts, loans and financing. Ricardo Beller is another “excellent” M&A and capital markets lawyer, who is involved in many large cross-border transactions in the oil and gas industry.

The firm also fields a strong patent and trademark team. Iris Quadrio is recognised in both areas and has “considerable experience” advising domestic and foreign clients on trademark and trade dress issues, including IP rights clearance, registration and management of IP portfolios and trademark opposition proceedings. Miguel O’Farrell has dedicated his practice to advising foreign and domestic clients on licensing agreements for many decades, as well as representing clients in trademark litigation proceedings. Martín Bensadon has a “comprehensive knowledge” of industrial property law with particular expertise in patent law.

Marval also boasts an “astute” international trade and customs team, covering international trade remedies, customs law, tariff code interpretation, rules of origin, non-tariff trade barriers and international trade litigation. Patricia López Aufranc is “highly regarded” in the field with a particular focus on anti-dumping investigations, while Horacio Garcia Prieto is an expert on customs law and is considerably experience in litigation matters brought before Argentinian authorities.

Total Listings in WWL 50 Established 1923
Home jurisdiction Argentina Total size of firm Over 300
Number of partners 55 Number of offices 2



Marval has been a member of the Pro Bono and Public Interest Committee since 2001, which is dedicated to providing cost-free counsel to over 200 NGOs. The firm was also an advocate for the Pro Bono Declaration for the Americas which it signed in 2008. Within Marval itself, an internal committee organises and distributes the pro bono work carried out by its lawyers. Notable organisations the firm assists include: Caritas, Responde, Familias de Esperanza and Hábitat para la Humanidad Argentina.



In recent years the firm has placed an emphasis on fortifying its international networks allowing Marval to provide effective legal assistance on inbound and outbound Argentinian investments. Since the opening of its New York office, the firm has also been able to provide invaluable support on US transactions. Marval O’Farrell & Mairal looks set to lead the Argentinian market for years to come.

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Marval O'Farrell & Mairal - Professional Notice

Founded in 1923, Marval, O’Farrell & Mairal is the largest law firm in Argentina. A market leader at both local and Latin American levels, the firm has been providing sophisticated, high-quality advice to international and local clients for 90 years. The firm comprises over 300 lawyers and has wide experience of international business issues and the complexities of cross-border transactions.

Main Areas of Practice

Banking and Finance: Secured and unsecured credit facilities, sovereign and sub-sovereign credit, trade finance, leasing transactions, vendor and leveraged lease financings, structured finance, project finance, government guaranteed securities, buyouts, acquisition finance, bank and commercial debtor restructurings, real estate financing, and bank regulatory matters. Contact: Santiago Carregal/Roberto E Silva Jr (e-mail:

Capital Markets: Structured receivable financing, money market preferred stock issues, asset purchase and sale programmes, commercial programmes, debt and equity securities offerings, securitisations, derivatives, synthetic products, risk reduction techniques and hedging agreements, debt and equity transactions, financial trusts, open and closed end mutual funds, and capital markets regulations. Contact: Santiago Carregal/             Roberto E Silva Jr (e-mail:

Commercial and Competition: International trade law, commercial agreements (including distribution and supply agreements), sale, purchase and leasing agreements, antitrust and unfair competition issues, product liability and consumer-related matters. Contact: Alfredo M O’Farrell/Miguel del Pino (e-mail:

Corporate/M&A: Inbound and outbound investment, including private equity transactions, M&A, due diligence audits, planning and joint ventures, shareholder agreements, restructurings and spin-offs. Contact: Alfredo M O’Farrell/Pablo D Viñals Blake (e-mail:

Employment: Restructuring, collective bargaining and government/union negotiations. Employee stock options and benefit plans. Employment aspects of corporate transactions. Litigation. Contact: Javier E Patrón/Enrique M Stile (e-mail:

Energy and Natural Resources: Development and financing of projects, acquisition of mining companies and all mining-related matters including exploration permits and title rights, the exploration, production, transportation, distribution, trading and marketing of hydrocarbons, contracts, environmental and regulatory issues and the development and operation of pipelines, gas treatment facilities, and power plants and other power projects. Contact: Francisco A Macías/Luis E Lucero (e-mail:

Environment: Litigation, administrative and regulatory matters and contracts, environmental audits and assessments and the evaluation of environmental liabilities and remediation programmes, M&A and real estate transactions. Contact: Francisco A Macías (e-mail:

Insurance and Reinsurance: The incorporation and acquisition of local insurers, drafting and adaptation of insurance plans and policies to Argentine law, the registration of foreign reinsurers and reinsurance brokers, and advice to brokers on litigation and ADR. Contact: Pablo S Cereijido/Leandro M Castelli                 (e-mail:

Intellectual Property: IP protection and management, transfer of technology and licence agreements, and international franchising agreements and licensing and registration of software, the protection of patents, utility models and ornamental design rights, trademark matters and worldwide trademark protection. Contact: Iris V Quadrio/Sergio M Ellmann (e-mail:

Litigation and Arbitration: Civil and commercial litigation, administrative proceedings, arbitration and ADR, enforcement of foreign judgments and awards in Argentina, bankruptcy and creditors’ rights (including recovery of debts), and participation in international arbitration as arbitrators, counsel or expert witnesses. Contact: Alberto D Q Molinario/Ricardo A Ostrower (e-mail:

Public/Administrative Law: All administrative law and regulatory matters, including administrative litigation. Contact: Héctor A Mairal/María Lorena Schiariti (e-mail:

Real Estate: Sale, purchase and leasing agreements, structuring, financing and development. Contact: Hernán Slemenson/Santiago Carregal (e-mail:

Tax and Customs: Tax-efficient structures for domestic and international transactions, strategic tax planning and innovative tax-driven products, customs and dumping claims. Contact: Horacio García Prieto/Gabriel Gotlib/Walter Keiniger (e-mail:

Telecommunications and Broadcasting: Regulatory and corporate matters, M&A and financing. Contact: Alberto J Rivera (e-mail:

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