Mark McLaughlin is senior counsel at Mayer Brown. He formerly served as the firm’s General Counsel, on the Management Committee and previously as a partner in the Firm’s Litigation & Dispute Resolution group with a practice that concentrated on antitrust, securities class actions and related litigation, and franchising and distribution matters. He has litigated substantial antitrust cases involving a variety of industries and issues, including monopolization claims, challenges to acquisitions, price fixing, exclusive dealing, sham litigation and price discrimination claims, and claims involving practices in foreign commerce. He also regularly provides counseling in antitrust matters.

Mark’s securities class action experience includes involvement in major securities class actions and related litigation. With regard to franchising and other distribution matters, Mark represents manufacturers and other suppliers against claims by former dealers, distributors, or sales representatives that the former relationship between the parties was a franchise, and against other claims seeking to challenge termination of the relationship. He regularly counsels clients on matters involving their dealer networks, on antitrust and other issues involved in pricing programs, and on the structure of distribution systems. Mark also frequently serves as an arbitrator, generally on distribution matters, as a member of the AAA commercial arbitration panel.

Mark has earned notable recognition for his accomplishments. He is rated by Martindale Hubbell as AV Preeminent, their highest possible rating. He has been called "very credible and very smart...He's one of those people whose essential decency and warmth have combined with and enhanced his advocacy skills" (Chambers USA 2007). Clients also consider him a "dynamic guy with a great courtroom presence. His experience leads him to litigate weighty antitrust cases involving a variety of industries" (Chambers USA 2006). Mark has regularly been included in The Best Lawyers in America (antitrust), and was named as Best Lawyers' 2014-15 Chicago Antitrust Law "Lawyer of the Year." Mark is recognized by Chambers and Partners USA as Illinois, Antitrust - Eminent Practitioner and has been selected as an Illinois Super Lawyer, 2006-2016 (antitrust). He is also listed in The Legal 500 US – Litigation, 2007 (antitrust), Who's Who Legal Illinois, 2006 and Benchmark Litigation Illinois2013 (antitrust and securities).


  • Englisch


University of Notre Dame, BA, summa cum laude

University of Notre Dame Law School, JD, magna cum laude
Law Review


  • Illinois


  • US Court of Appeals for the Tenth Circuit
  • US Court of Appeals for the Eighth Circuit
  • US Court of Appeals for the Seventh Circuit
  • US Court of Appeals for the Eleventh Circuit
  • US District Court for the Eastern District of Wisconsin
  • US District Court for the Central District of Illinois
  • US District Court for the Northern District of Illinois


  • Board of Directors, American Diabetes Association, Northern Illinois Affiliate, Inc., 1985-1994; Chairman, 1990-1992
  • American Bar Association, Section of Antitrust Law, Forum on Franchising
  • Governing Committee, ABA Forum on Franchising, 1992-1995
  • ABA Section of Antitrust Law, Chair, Membership Committee, 1993-1996  
  • Part-time Faculty, Loyola University of Chicago School of Law (antitrust courses), 1983, 1986, 1988-1990