Jonathan L. Lewis Partner

Jonathan is a solutions-oriented antitrust and competition lawyer who helps clients with transactions, litigation and the management of day-to-day business risk. His practice focuses on antitrust matters, commercial litigation and merger review and pre-merger integration planning.

He litigates antitrust claims involving price fixing, exclusive dealing, predatory pricing, monopolization and attempted monopolization as well as class actions.  He also has experience litigating matters on trial teams and as the lead trial lawyer in cases involving breach of contract claims.

In addition to his litigation experience, Jonathan counsels clients on distribution and business matters.  He regularly represents clients before federal and state antitrust enforcement authorities over the course of investigations concerning distribution practices and pre- and post-merger review and has worked on mergers clearance/investigations with particular experience in the manufacturing, communications and healthcare industries. 

Jonathan has served as a member of the 2016, 2017, and current 2018 Law360 Competition Editorial Advisory Board. He is a member of the American Bar Association’s Antitrust Section and formerly served as Chairman of the Illinois State Bar Association’s Antitrust & Unfair Competition Law Section Council.


Represented leading equipment manufacturer in breach of warranty class actions involving on-highway diesel engines and marine diesel engines.

Provide strategic advice to a leading manufacturer of water treatments systems on all aspects on its business, including representing it in dealer termination matters and general commercial litigation.

Provide strategic advice to a leading chemical manufacturer on all aspects of its business.

Provide strategic advice to a leading industrial equipment manufacturer on all aspects of its business.

Represented one of Canada’s oldest and largest biopharmaceutical companies throughout the merger clearance process in connection with the sale of that company.

Represented worldwide software and product lifecycle management solutions leader throughout merger clearance with acquisition of leading provider of manufacturing software solutions.

Advised leading manufacturer of mining and other industrial equipment in its $8.6 billion acquisition of manufacturer of equipment used in surface and underground mining during integration of company.

Represented leading steel manufacturer in connection with allegations that steel producers entered into multiyear antitrust conspiracy to reduce production of steel products in the United States through coordinated production cuts for the express purpose of raising price of steel products.

Represented affiliates of leading wireless carrier in disputes and related transactions. Cases were resolved by wireless carrier acquiring affiliates for approximately $831 million in cash and assumed debt.

  • Represented three affiliates of leading wireless carrier seeking to enjoin $11 billion transaction from closing. Case was resolved after expedited discovery.
  • Member of trial and appellate teams that represented affiliate of leading wireless carrier in dispute regarding breach of management agreement between parties. Lawsuit alleging a merger would result in breach of certain exclusivity rights was filed after wireless carrier announced $35 billion merger with competitor. Injunction was issued requiring wireless carrier to divest itself of the competing network and assets in affiliate’s service area. Decision was affirmed by Illinois Appellate Court and Illinois Supreme Court denied petition for leave to appeal.
  • Member of trial team that represented two affiliates of leading wireless carrier in a dispute regarding a breach of management agreements between the parties. Court ordered wireless carrier to cease using its trademark to promote competing products in affiliates’ exclusive territories.

Represented leading healthcare system against antitrust claims of price fixing brought on behalf of purported class of registered nurses employed by defendant hospital systems. District court denied plaintiffs' motion for class certification of approximately 19,000 registered nurses in 52-page opinion. Settled after plaintiffs' motion for class certification was denied.

Advised largest single health carrier in the United States with regard to $2.6 billion acquisition.

Advised leading home appliance manufacturer with regard to $1.79 billion acquisition and $107 million sale of non-core product line.

Represented leading integrated healthcare delivery system in government investigation of a completed provider transaction and its contracting practices involving employed and independent physicians.

Member of team that represented nation’s premier marketing services company in case in which competitor claimed that client’s exclusive contracts with retailers and other conduct violated Sections 1 and 2 of the Sherman Act, the Illinois Antitrust Act, and various common law duties. Obtained summary judgment in favor of client and court rejected plaintiffs’ definition of relevant product market. Decision was unanimously affirmed by panel of the Seventh Circuit

  • University of Michigan Law School, JD, cum laude, 1999
  • University of Maryland, MPM, 1993
  • University of Maryland, BA, Economics, with Honors, 1992

Member, Editorial Advisory Board, Competition, Law360, 2016; 2018 - present

American Bar Association: Antitrust Section, 1999 – Present

Former Chairman, Illinois State Bar Association: Antitrust & Unfair Competition Law Section Council, 2007-2008

  • District of Columbia
  • Illinois
  • U.S. District Court for the Northern District of Illinois

Selected for inclusion as a "Leading Lawyer," Antitrust: Civil Litigation and Class Action, Washington, D.C., Legal 500 US, 2017-2018

Selected for inclusion in The Best Lawyers in America, Antitrust Law, 2020, Woodward/White, Inc.

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