Michelle A. Mantine Photo

Michelle co-leads our Antitrust & Competition Team. Michelle has wide-ranging experience in complex commercial litigation, investigations, and regulatory matters with a particular focus on antitrust and competition issues. She has represented clients in a variety of antitrust disputes relating to price fixing, monopolization, tying, and unfair competition. She also routinely provides clients with guidance regarding pre- and post-merger antitrust counseling relating to the Hart-Scott-Rodino Act, responses to government investigations and subpoenas, and antitrust compliance issues.


  • Duquesne University School of Law, 2006, J.D., cum laude, Comment Editor, Duquesne Law Review; Katie Elisabeth Westbrook Award for Excellence (2006); Order of the Barristers (2006); ATLA Regional Trial Competition Champions (2006); Buffalo/Niagara Trial Competition Finalist & Best Advocate Award (2005); National Trial Competition Regional Finalist (2005); Carol Los Mansmann First Year Appellate Moot Court Competition Finalist (2004)
  • Washington & Jefferson College, 2003, B.A., Economics, Political Science and Spanish, summa cum laude, Phi Beta Kappa; Recipient of The Benjamin Franklin Book Prize in Economics, The Howard Goldfarb Prize in Political Science, and The J. Adolph Schmitz Prize in Languages

  • Pennsylvania
  • West Virginia

  • State Supreme Court - Pennsylvania
  • Supreme Court of Appeals - West Virginia
  • U.S. District Court - Western District of Pennsylvania
  • U.S. District Court - Southern District of West Virginia
  • U.S. District Court - Northern District of West Virginia
  • U.S. District Court - Central District of Illinois
  • U.S. Court of Appeals - Ninth Circuit

  • American Bar Association – Antitrust Section
  • Duquesne Law Alumni Association – Board of Governors (2008-2010)
  • Washington & Jefferson College – Pre-Law Alumni Advisory Board (2011-present)

  • Chief Judge Gary L. Lancaster (deceased), U.S. District Court - Western District of Pennsylvania, 1 January 2009 to 31 December 2010


  • 2016 PBT Fast Trackers List, Pittsburgh Business Times
  • 2016 Lawyers on the Fast Track, The Legal Intelligencer
  • 2011 Outstanding Recent Graduate Award, Duquesne University School of Law, Women’s Law Association

Civic and Charitable Affiliations

  • American Heart Association – Go Red For Women Campaign (2007-2011)
  • Leadership Pittsburgh Inc. (a nonprofit organization whose mission is to strengthen regional leadership through programs, partnerships and connections) – Selected for admission to its Leadership Development Initiative XXIII Class
  • Pittsburgh YWCA – Board Member (2015-2018); Secretary and Chair of Development Committee (2017)


Michelle lives with her husband, Brian, their daughter, Madeline, and their son, Henry, in Sewickley, Pennsylvania. As a former marathoner, competitive figure skater and figure skating coach, she now enjoys practicing yoga, as well as taking barre and spinning classes.