Joseph Matelis, a partner in S&C’s Litigation Group, is a seasoned antitrust lawyer with deep government experience. His practice focuses on antitrust matters, including merger reviews, other civil and criminal government proceedings involving competition issues, litigation, and counseling, including advising clients about no-poach and wage-fixing agreements. His recent representations span a variety of industries.
Mr. Matelis rejoined Sullivan & Cromwell in 2013 from the U.S. Department of Justice’s Antitrust Division, where he served as Counsel to eight Assistant Attorneys General and Acting Assistant Attorneys General and participated in enforcement decisions across a variety of industries, including the telecommunications, technology, financial services, energy, beer, and healthcare sectors. At the Division, he developed statements of enforcement policy and practice, including the 2010 Horizontal Merger Guidelines, the 2011 Policy Guide to Merger Remedies, protocols regarding coordinating Division investigations with non-U.S. competition agencies, and Competition and Monopoly: Single-Firm Conduct Under Section 2 of the Sherman Act. In 2012, he became the Division’s Chief Counsel for Innovation.
Before joining the Antitrust Division, Mr. Matelis was a member of Sullivan & Cromwell’s Litigation Group and represented clients during merger reviews at the U.S. Department of Justice and the Federal Trade Commission. He also represented Microsoft Corporation for several years in private actions alleging unlawful monopoly maintenance.
Mr. Matelis speaks about antitrust issues frequently, including as a lecturer at Duke Law School, Harvard Law School, the Kellogg School of Management, and the Yale School of Management.
Who’s Who Legal: Competition recognized Mr. Matelis as a leading practitioner (2020-2023) and as a Future Leader in 2019. Mr. Matelis is also recognized as one of the "500 Leading Litigators in America" by Lawdragon (2024). He has also been ranked by Chambers USA for Antitrust (2019-2023), where a source noted that he is “very knowledgeable of the antitrust approval process” and “has a clear understanding of how to deal with regulators.”
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