Sarah R. LaFreniere

Sarah R. LaFreniere

  • Partner
  • Washington, DC
she / her / hers


Sarah’s practice focuses on complex litigation including antitrust, financial services, and commercial disputes. 

Sarah represents clients in litigation for harm suffered throughout the world, using innovative solutions to provide exceptional advocacy. Sarah has prosecuted claims of nascent competitors and small businesses challenging anticompetitive conduct by dominant market players, and she has represented state entities in commercial disputes. Sarah has obtained discovery in the United States for non-U.S. litigants through 28 U.S.C. § 1782. Her experience spans a wide range of complex litigation, and her efforts have helped clients recover more than $2.3 billion in settlements.

Sarah’s commitment to the advancement of global antitrust and competition law is demonstrated through her role as Managing Editor of Hausfeld’s Competition Bulletin. As the only Plaintiff’s-side antitrust publication dedicated to insights into noteworthy antitrust investigations, judgments, regulatory decisions, and competition law developments in the United States, the UK, and Europe, the Bulletin is widely recognized as market-leading by peers, clients, and the judiciary.


Sarah’s clients include investors, multinational corporations, public entities, non-profit organizations, technology companies and small businesses. Sarah currently represents individual and institutional investors, U.S. manufacturers, and a technology start-up. Her former clients include art house cinemas challenging a dominant competitor, a leading software manufacturer challenging patent infringements, a royalty-rights holder in the college athletics space, and an industry organization in the first amendment sphere.