Marco D’Ostuni is a partner based in the Rome office. Mr D’Ostuni is distinguished as a leading lawyer in competition/antitrust (Italy) and in TMT: telecommunications by Chambers Europe. His practice focuses on antitrust, telecommunications, media and energy law. He has represented clients before the Commission and the Italian Antitrust Authority in antitrust investigations and merger filings; in proceedings before the Italian Communications Authority (AgCom) and the Italian Energy Authority; and in arbitration and litigation before civil and administrative courts involving complex antitrust or sector regulation issues.

Mr D’Ostuni is the co-author of many publications on antitrust matters. He joined Cleary Gottlieb Steen & Hamilton LLP in 2000 and until June 2001 was based in the New York office. He became partner in 2009. He graduated with honours from Naples University Law School in 1996. He obtained an LLM in Advanced European Legal Studies from the College of Europe of Bruges in 1998. In the same year, he won the Best Advocate General prize in the European Law Moot Court Competition, awarded by the European Court of Justice (where he later interned briefly). He obtained an LLM from the Columbia University School of Law, where he was a Harlan Fiske Stone Scholar, in 2000, after receiving a Fulbright Scholarship. In 2008, he obtained a PhD in competition law from the University of Perugia, Italy. Prior to joining Cleary Gottlieb, Mr D’Ostuni was a trainee at an administrative law firm in Naples from 1996 to 1997. From 1998 to 2000, he was an associate at a major international competition law firm in Brussels. Mr D’Ostuni has been a member of the Naples Bar since 2001, and of the New York Bar since December 2003. He is a native Italian speaker, is fluent in English, French and Spanish, and has a basic knowledge of Portuguese.