Chiomenti advises domestic and international clients on complex competition matters, including abuse of dominance, merger control and cartel investigations. The team is led by Marco D’Ostuni, who also represents clients in follow-on damages actions arising from EU competition infringements. Cristoforo Osti is noted for his work on behavioural matters and merger proceedings, while Guido Bellitti handles litigation before national administrative authorities. Alessandra Prastaro supports clients with antitrust risk assessments, particularly in the digital and e-commerce sectors, working closely with Osti to ensure compliance with evolving regulatory frameworks.
Legal 500 Editorial commentary
Accolades
Client satisfaction: Sector knowledge
Testimonials
Collated independently by Legal 500 research team.
- 'Always at your disposal, providing quick & complete answers, leading the activities necessary with project management skills, Prof Osti for the deep knowledge.'
Work highlights
Advised and represented Ewiva in the proceedings opened by the Italian Competition Authority to assess whether Enel X Way and Ewiva, jointly, may have engaged in exclusionary conduct towards non-integrated competitors providing electric charging services in Italy.
Assisted Pirelli in the proceedings of the Court of Justice of the EU stemming, as preliminary ruling proceedings, from actions for damages brought by plaintiffs based in Gulf States, in relation to the European Commission’s decision in the Power Cables cartel case.
Provided assistance to TIM in relation to proceedings (Microsoft Teams), initiated by the European Commission against Microsoft Ireland Operations and its parent company for having allegedly tied their collaboration and communication product Teams to their enterprise suites Office 365 and Microsoft 365.
Lawyers
Hall of Fame
The lawyers at the very top of the profession, widely known and respected by peers and clients for their longstanding involvement in market-leading work.
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Guido Bellitti
Marco D’Ostuni
Leading associates
Leading associates with regular involvement in their team's key work, and recognition from peers or clients as being ones to watch.
Practice head
Marco D’Ostuni
Other key lawyers
Alessandra Prastaro; Cristoforo Osti; Guido Bellitti