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Andrew G. Klevorn

Chicago Office

Andrew G. Klevorn is an experienced antitrust and commercial trial lawyer. He plays a principal role in antitrust grand jury investigations, class actions and other civil and criminal antitrust matters. Andy counsels clients with respect to the antitrust aspects of proposed mergers and acquisitions and assists clients in a wide variety of industries, including paper, cement, fertilizers, consumer goods, telecommunications, printing, petroleum products, industrial gases and dairy products.

Andy's broad trial background spans a variety of matters, including the defense of class actions, grand jury investigations, construction claims, mass torts and product liability, arbitrations and breach of contract matters. Clients describe him as "fantastically knowledgeable, particularly on antitrust matters" and "a polished and self-assured attorney who really instills trust in his clients" (Chambers USA). In his more than 25 years in practice, Andy has represented clients before the state and federal courts, the Federal Trade Commission (FTC) and the US Department of Justice (DOJ). Clients note that Andy has "the right combination of smarts and customer friendliness that makes it a pleasure to work with him" (Chambers USA).

Prior to joining Katten, Andy founded law firm Eimer Stahl Klevorn & Solberg and was a partner at another large law firm. He is a frequent writer and commentator and is published in The Wall Street Journal, the American Bar Association's Antitrust Litigator and Corporate Counsel magazine. He is a regular speaker and panelist at antitrust conferences and seminars.

Shown below is a selection of Andrew’s engagements.

  • Representation of Kimberly-Clark in connection with its acquisition of Scott Paper Company.
  • Representation of the nation's largest printer in its successful defense against a preliminary injunction proceeding and subsequent administrative action brought by the Federal Trade Commission seeking to enjoin the acquisition of its leading competitor. This matter represents one of the few transactions in which the FTC lost both the preliminary injunction and administrative litigation that sought to bar a proposed merger.
  • Dismissal of Holcim (US), Inc. against claims that it had conspired to fix the prices of cement and concrete in Florida.
  • Defense of a leading chemicals manufacturer in a grand jury investigation of potential price-fixing and market allocation; no indictments were returned.
  • Defense of Kimberly-Clark against claims that it monopolized or attempted to monopolize the sale of disposable training pants.


Super Lawyers, Illinois, 2005, 2008–2019
Best Lawyers in America, 2013–2019
Chambers USA, 2011–2019

BTI Client Service All-Star

BTI Client Service All-Star, 2014
Firm News
Andrew G. Klevorn


  • JD, University of Michigan Law School, magna cum laude
  • BA, The University of Chicago, with honors

Bar Admissions

  • Illinois


Super Lawyers
Illinois, 2005, 2008–2019
Best Lawyers in America
Chambers USA

BTI Client Service All-Star

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  • American Bar Association, Antitrust Section
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