Leigh Oliver

Partner at Clifford Chance

Speaker

Leigh is based in Washington, D.C. and is Head of the US Antitrust Practice and Co-Head of the Healthcare & Life Sciences Sector. She specializes in antitrust issues ranging from bet-the-company merger control matters to state and federal antitrust investigations. She has more than two decades of experience advising clients in heavily scrutinized industries, including healthcare, life sciences, aerospace and defense and industrials. She regularly represents clients before federal and state antitrust agencies and in merger litigation in federal court. Leigh is particularly commended for her work in healthcare-related antitrust matters and regularly appears before the FTC in merger investigations and challenges. She leads the Clifford Chance Antitrust team that is described by clients in Legal 500 USA, 2024 as ‘Top notch lawyers. Unparalleled in their understanding of how to knit together the complexities of merger control across multiple competing jurisdictions."

Leigh is a member of the Council of the ABA Antitrust Section and a Member of the American Health Lawyers Association. She has been ranked among the top lawyers for Antitrust by Chambers USA for four consecutive years from 2021 – 2024 and recommended for Competition: Global Leaders in Who's Who Legal, 2024. She was also listed in the 2025 edition of Lawdragon 500 - Leading Litigators in America.