LAWYER PROFILE
Mario Siragusa

Mario Siragusa

Europe 2026

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Ranked in 1 practice area

Contributions and articles

2 Global Practice Guides

About

Provided by Cleary Gottlieb Steen & Hamilton LLP

Practice Areas

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.

Career

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

Professional Memberships

Member of Brussels and Rome Bar. Admitted to practice before the highest court of Italy.

Member of the Commission on Law and Practices Relating to Competition (Paris); President of the Associazione Italiana Giuristi Europei (AIGE); Professor at College of Europe, Bruges.

Publications

Numerous publications on competition matters.

Personal

Language capability: Italian, French, English

Chambers Review

Provided by Chambers

Chambers European Guide

Competition/European Law - Italy

Star Individual
Star Individuals

Individual Editorial

Mario Siragusa stands out in the Italian market for his ability to represent high-profile clients in significant competition law investigations and subsequent appeals against fines and follow-on damages actions. He also advises clients on high-value merger clearance mandates.

Strengths

Provided by Chambers

  • Mario Siragusa is very knowledgeable and has great experience.

    Competition/European LawChambers European Guide
  • He is a smart and clever lawyer.

    Competition/European LawChambers European Guide
  • Mario Siragusa is an institution himself; he moves through the courtroom with confidence.

    Competition/European LawChambers European Guide
  • Mario Siragusa has unique experience and stands alone.

    Competition/European LawChambers European Guide
  • Mario Siragusa has seen everything in his career and is able to focus in on the most important issues in complex matters and deliver very good advice.

    Competition/European LawChambers European Guide

Ranked Individuals at Cleary Gottlieb Steen & Hamilton LLP (57)

Belgium

Europe-wide

Italy

All Contributions (2)

Provided by Cleary Gottlieb Steen & Hamilton LLP

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