Cleary Gottlieb Steen & Hamilton

Cleary Gottlieb Steen & Hamilton maintains a market-leading offering that spans the full range of antitrust litigation, with notable strength in merger litigation and contentious cross-border mandates. Leah Brannon and Jeremy Calsyn jointly oversee the department; Brannon focuses on global merger clearance matters, monopolization cases, and conspiracy litigation, while Calsyn represents clients in class actions and cartel and price-fixing litigation, particularly in the automotive parts industry. Dave Gelfand is a name to note on the merger litigation front, having successfully represented major healthcare and aviation clients in high-profile litigated merger challenges. Heather Nyong’o is another key name for civil antitrust litigation work, regularly representing major multinationals and executives in such cases, while seasoned antitrust litigator George Cary  handles IP-related antitrust work in the high-tech sector from the San Francisco office. Ryan Shores joined from Shearman & Sterling LLP in July 2023, further strengthening the firm’s merger challenge offering. Unless otherwise stated, all mentioned lawyers are based in Washington DC.