• New York University, B.A. Cultural Theory (2002) cum laude
  • University of St. Andrews, Master of Letters (2004) honors
  • University of St. Andrews, Ph.D. English (2009)
  • University of California, Irvine School of Law, J.D. (2015)


  • New York
  • U.S. District Court, Eastern District New York
  • U.S. District Court, Northern District New York
  • U.S. District Court, Southern District New York
  • *Licensed to practice in New York Only and under the Supervision of the Partners of Crowell & Moring LLP. Not admitted in California.

Margaux Poueymirou

+1.415.365.7243 (office)
+1.917.685.9775 (mobile)

Margaux is an antitrust litigator who uses her experience on both sides of the “v” to craft client-centric litigation strategies in high-stakes antitrust actions.  Experienced at driving cases from inception through trial, Margaux works across diverse industries, with particular experience in healthcare and pharmaceutical markets and in recovering damages on behalf of entities victimized by price-fixing cartels.

Originally from New York City, Margaux studied in Scotland where she earned her doctorate in English literature. After returning to the east coast, she taught art history and literature in colleges around New York City before deciding to go to law school. It was at law school where Margaux developed a passion for antitrust law. That passion continues to drive Margaux’s practice today, which now includes extensive experience litigating antitrust cases involving price-fixing, market and customer allocation, group boycotts, and pay-for-delay under state and federal antitrust and unfair competition laws. A strategic advisor to clients, Margaux works with companies at every step of the litigation process, from pre-case strategy to appeals, and in forums ranging from large multi-district litigation (MDL) and class actions to governmental enforcement proceedings. Margaux is focused on achieving the right outcome for clients, employing a holistic approach to litigation that’s tailored to obtain optimal results.

Margaux is also deeply invested in her pro bono practice. She has successfully represented clients in immigration bond hearings and defended depositions on behalf of pro se litigants in commercial disputes. Margaux has also briefed and argued compassionate release motions under the First Step Act that have resulted in sentence reductions of life without parole to time served.


  • Hon. Janet Bond Arterton, U.S. District Court for the District of CT, Connecticut, CT 2015 – 2016

Representative Matters

  • Represent health plans in antitrust recovery actions across healthcare and pharmaceutical class actions
  • Represented health plans and pension funds in reverse payment antitrust claim alleging anticompetitive conduct that delayed the entry of generic memantine, leading to $56 million settlement
  • Represented major retail pharmacy in MDL in the Eastern District of Pennsylvania in connection with its claim regarding Defendants’ alleged anticompetitive behavior concerning the sale of hundreds of generic pharmaceuticals
  • Represented state agencies in defense of regulatory scheme in state and federal court from inception through trial and appellate review
  • Successfully obtained dismissal of RICO conspiracy action against individual with decision upheld by the Second Circuit
  • Prepared clients for Antitrust Division interviews and CID requests


  • "Penn State Hershey: A Cautionary Tale for Antitrust Litigators," Competition Policy International (June 4, 2019). Author: Margaux Poueymirou