David L. Hanselman, Jr. represents clients in a broad range of antitrust and class action lawsuits. He heads the Chicago office’s antitrust and competition practice group, which has earned Global Competition Review’s “Elite” ranking eight years running.

David defends businesses in large, complex antitrust litigations and specializes in antitrust class actions. Since 2010, David has defended clients accused of price fixing in five multidistrict antitrust litigations: In re Generic Pharmaceuticals Pricing Antitrust Litigation, In re Domestic Drywall Antitrust Litigation, In re Dairy Farmers of America, Inc. Cheese Antitrust Litigation, In re Steel Antitrust Litigation, and In re Sulfuric Acid Antitrust Litigation.

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  • In re Generic Pharmaceuticals Pricing Antitrust Litigation (E.D. Pa.) – Currently defending Impax Laboratories, Inc. in multidistrict litigation involving allegations that generic pharmaceutical manufacturers conspired to increase the price of generic drugs in violation of Section 1 of the Sherman Act
  • In re Domestic Drywall Antitrust Litigation (E.D. Pa.) – Defeated indirect purchaser plaintiffs’ motion for class certification and negotiated settlements valued at 1% of claimed damages in direct purchaser and opt-out actions on behalf of Eagle Materials Inc. and American Gypsum Company LLC in multidistrict litigation arising from allegations that defendants conspired to fix the price of gypsum wallboard in violation of Section 1 of the Sherman Act
  • In re Steel Antitrust Litigation (N.D. Ill.) – Defeated direct purchaser plaintiffs’ motion to certify a US$17.4 billion damages class and obtained complete dismissal of all indirect purchaser claims on behalf of Steel Dynamics, Inc. in putative, nationwide class actions against producers of raw steel alleging an antitrust conspiracy to fix prices by restricting the supply of all steel products in the United States

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  • The Legal 500 US 2019
  • Tony Patino Fellowship (a merit scholarship awarded to law students who demonstrate leadership ability and commitment to public service) and John M. Olin Fellowship for academic work in law and economics
  • Elected student government president at Harvard College


University of Chicago Law School, JD, cum laude, 1998
Harvard College, AB, cum laude, 1995


US Court of Appeals for the Third Circuit
US Court of Appeals for the Fourth Circuit

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David L. Hanselman, Jr.

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