Mario Siragusa focuses on corporate and commercial matters, and he specializes in EU and Italian competition law and complex commercial litigation.

He appears frequently before the European Court of Justice, the General Court of the European Union, the Directorate General for Competition of the European Commission, as well as the Italian Antitrust Authority and Italian civil and administrative courts.

Mario joined the firm in 1973, became partner in 1980, and became senior counsel in 2018.


  • President, Associazione Italiana Giuristi Europei (AIGE)
  • Member, Commission on Law and Practices Relating to Competition, International Chamber of Commerce, Paris

  • Professor, College of Europe, Bruges


“EU Court of Justice Confirms That Italian Deposit Guarantee Scheme Intervention in Support of Banca Tercas Did Not Constitute State Aid,” Cleary Gottlieb Alert Memo, April 2, 2021.

The VBER and Vertical Guidelines: Revision or Reform? Reflection on Critical Issues,” Concurrences, December 9, 2020.

“A New Instrument on the Market for the European Commission?,” Il Sole24Ore, May 11, 2020. 

Payment Services in the EU: Price Regulation to Protect a Duopoly,” Competition Law Journal, January 30, 2020.

USA Against Big Tech, All Possible Scenarios and What It Means to Europe,” Agenda Digitale, July 25, 2019.

Private Antitrust Enforcement in Italy,” Antitrust Chronicle (Volume 3, Number 1) (A. Comino co-author), June 4, 2019.

“Disapplication of National Law Conflicting with EU Competition Rules: the Italian Competition Authority’s Decision-Making Practice,” Europäisches, deutsches und internationales Kartellrecht, Otto Schmidt, 2018.

The EU Court of Justice Clarifies the Scope of the Regulatory Framework for Three-Party Schemes but Individual Assessment Is Needed to Determine Whether Fee Caps Apply,” Concurrences, February 7, 2018.

Chapters on Italy in: The International Comparative Legal Guide to Cartels & Leniency (Global Legal Group, 2008-2013), Getting the Deal Through – Private Antitrust Litigation (Law Business Research, 2003-2014).

“Italy," Global Legal Insights: Merger Control (1st ed., Global Legal Group, 2012) (M. Beretta co-author).

Italian Merger Control Law,” Merger Control Worldwide (2nd ed., Cambridge University Press, May 2012) (M. Beretta co-author). 

Italian chapter in Merger Control, Global Legal Insight , 2011, 2013 (M. Beretta co-author).

The Legislative Framework of the Cartel Prohibition.” Italy chapter in The International Comparative Legal Guide to: Cartels & Leniency 2011. 132-139. Global Legal Group. (C. Rizza co-author).

“I mercati rilevanti dei prodotti e servizi e la regolazione ex ante”, F. Bassan (ed.), Diritto delle comunicazioni elettroniche: Telecomunicazioni e televisione dopo la terza riforma comunitaria del 2009, 2010 (Mario Siragusa, M. D’Ostuni and F. Marini Balestra co-authors).