Europe Guide 2026 : Spain
Provided by Chambers
Based in Madrid, the arbitration team at A&O Shearman represents clients in international investment arbitrations, including Energy Charter Treaty investment arbitrations. The firm is also visible in domestic and international commercial arbitration cases relating to disputes arising from breaches of agreements.
Founder of the firm's arbitration practice, Antonio Vázquez-Guillén is a key contact.
Provided by Chambers
A&O Shearman advised BBVA on an arbitration brought by two minority shareholders against Distrito Castellana Norte.
Provided by Chambers
The team at A&O Shearman maintain good customer contact and are able to explain complicated legal matters in clear, simple language.
The quality at A&O Shearman is outstanding.
A&O Shearman's technical abilities are very good.
The team are always clear and very comprehensive in their responses.
Chambers is the leading data and intelligence partner for the legal sector.
