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Antonio Vazquez-Guillen



Vazquez-Guillen Antonio
Antonio Vazquez-Guillen



Antonio is head of the Litigation/Arbitration Department in Spain and Co-Managing Partner of Allen &Overy Spain. He has conducted many proceedings in the commercial, banking and finance fields, relating to breaches of contract, enforcement of guarantees, insolvencies and claims for damages. Antonio represents many international investors in investment treaty disputes under ICSID and UNCITRAL rules, in renewable energy and infrastructure related disputes. He has also been involved in some high profile arbitration proceedings before the ICC and the Madrid Chamber of Commerce and has advised credit entities in insolvencies relevant for the national economy. Antonio has experience in administrative law and regulatory, including energy, infrastructures, public contracts and administrative proceedings. Prior to joining Allen & Overy in 2005, he was State lawyer before the Regional Court of Justice of Galicia.

Antonio has been consistently recommended for his excellent work in the main legal directories, such as Chambers & Partners and Legal 500.

News & insights

News: 27 FEBRUARY 2020

Global Antitrust group retains top three ranking by Global Competition Review

For the third year running, Allen & Overy’s global antitrust group has been ranked number three in Global Competition Review’s annual survey of the world’s leading competition practices. 

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Publications: 26 FEBRUARY 2020

New OECD Guidance on transfer pricing aspects of financial transactions and main take-aways for Luxembourg

On 11 February 2020, the Organisation for Economic Co-operation and Development (“OECD”) published the “Transfer Pricing Guidance on Financial Transactions” (the “Report”). 

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Publications: 27 NOVEMBER 2019

New remuneration for renewable energy in Spain

More favourable treatment seeks to avoid the initiation of new arbitration proceedings and to terminate existing ones

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Publications: 03 AUGUST 2018

Argentina fosters international arbitration

Modernisation package, that included reform of PPP contracts and dispute resolution, offers greater stability to foreign investors

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Admitted as solicitor, Spain, 1993


Law Degree, ICADE, 1992

Diploma in Business Administration, ICADE, 1992