I focus on antitrust and competition law, and I advise our clients on all aspects of government merger review, antitrust investigations, litigation and compliance.
Kathy O'Neill is incredibly analytical.
Chambers USA, 2024
Kathy is an outstanding lawyer. She has great judgment.
Chambers USA, 2024
Admissions and credentials
New York
Pennsylvania
District of Columbia
Rankings and accolades
Chambers USA: Antitrust – District of Columbia (2024)
Women@Competition: 40 in their 40s Notable Women Competition Professionals in Europe, the Americas and Africa (2019)
Global Competition Review: Women in Antitrust award (2016)
DOJ Antitrust Division: Assistant Attorney General Award for outstanding contributions to enforcement matters (eight-time winner)