Perry Lange represents clients in diverse antitrust matters before US courts, the US Department of Justice and Federal Trade Commission, state attorneys general and Congress. He has extensive experience litigating antitrust cases, including trials and appeals, securing merger clearance, and defending state and federal investigations. He has also represented a diverse set of clients in antitrust policy matters such as congressional investigations and hearings in both the House and Senate, including in the House and Senate Judiciary Committees, and the House Energy and Commerce, Oversight and Reform, and Small Business Committees.

Mr. Lange has represented companies in the high technology, telecommunications, artificial intelligence, entertainment, automotive, retail, media, pharmaceutical, energy, manufacturing, financial services and transportation sectors.

Earlier in Mr. Lange's professional career, he worked for seven years in the United States Congress, including as a legislative assistant for a member of the Senate and a legislative director for a member of the House of Representatives. He was also a senior legislative representative for a US civil rights/civil liberties organization. 

Professional Activities

Mr. Lange is a vice-chair of the ABA Antitrust Section’s Joint Conduct Committee. He is the editorial chair of the section’s handbook Intellectual Property Misuse: Licensing and Litigation, 2nd edition, editorial chair of the Restraints of Trade chapter of the 2018, 2019, 2020 and 2022 Annual Review of Antitrust Law Developments, and an editor of Joint Ventures: Antitrust Analysis of Collaborations Among Competitors, 3rd edition. 

Mr. Lange also has an active pro bono practice in which he has represented clients such as a disabled Iraq war veteran, a small business owner, and a federal employee in civil rights and benefits matters before US courts, federal agencies and local government.


  • Litigation

    • Member of trial team for mobile wireless carrier in a contract dispute in Delaware Chancery Court.
    • Represented a global oil and gas company in antitrust MDL over alleged manipulation of price reporting agency reports.
    • Represented a major technology manufacturer in matters concerning standards setting and IP licensing.
    • Represented a large financial institution in connection with merchant and consumer antitrust litigation concerning the setting of interchange fees. 
    • Represented a leading US movie theatre chain in state and federal antitrust litigation over film licensing practices brought by competing theatre owners.
    • Member of trial team for energy company in state criminal antitrust litigation.
    • Represented large telecommunications manufacturer in antitrust case challenging conduct related to participation in a standards setting organization.
    • Member of trial team for pharmaceutical patentee and its exclusive licensee in patent damages trial that resulted in $2.15 billion settlement. 
    • Represented consumer electronics patentee before the Federal Circuit in a significant case at the intersection of patent licensing and antitrust law. 
    • Represented a major insurance company in the In re Insurance Brokerage Antitrust MDL.
    • Represented international airlines in multi-district litigation concerning allegations of price-fixing in the international air cargo and passenger sectors.
    • Represented shipping company in antitrust arbitration and state court antitrust and unfair competition law actions.
  • Merger Clearance

    • Representing technology and manufacturing companies in Department of Justice and Federal Trade Commission investigations into transactions involving chipsets for artificial intelligence. 
    • Represented global science and technology company in obtaining FTC clearance of $21 billion acquisition of leading provider of instruments, consumables, and software used in the manufacture of biopharmaceutical drugs.
    • Represented a major US broadcast company in obtaining DOJ clearance of its purchase of 21 regional sports networks.
    • Represented three major Japanese container shipping carriers in obtaining DOJ clearance of their joint venture, Ocean Network Express.
    • Represented Cumberland Farms in obtaining FTC clearance of the sale of Gulf Oil.
    • Represented a technology company in obtaining DOJ clearance of the merger of two network monitoring equipment manufacturers.
    • Represented a technology company in securing FTC clearance of a transaction in the mobile internet advertising industry.
  • Agency Investigations

    • Representing a private equity company in investigations by the Federal Trade Commission and a state attorney general in the health care space.
    • Represented a major natural gas company in Department of Justice investigation into leasing practices.
    • Represented auto OEM in high-profile Department of Justice investigation into a greenhouse gas emissions regulatory framework with the state of California.
    • Represented a major technology company in a Hart Scott Rodino “device to avoid” investigation by the US Department of Justice and Federal Trade Commission.
    • Represented media companies in criminal Department of Justice Investigation.
  • Congressional Hearings and Investigations

    • Represented a major mobile wireless carrier in US Senate and House hearings and state attorney general reviews of its acquisition of another major mobile wireless carrier.  
    • Represents technology and telecommunication companies in House Judiciary and Oversight and Reform Committee investigations.


  • Named a Thomson Reuters Stand-out Lawyer – independently rated and selected by clients.
  • Selected by peers for inclusion in Best Lawyers in America for antitrust law (2021-2023) and antitrust litigation (2023).
  • Recognized in the 2019 edition of Who's Who Legal: Competition.
  • Recommended in the 2016 and 2017 editions of The Legal 500 United States for his antitrust cartel and merger control practices.
  • Selected as a "Rising Star" in the 2015 edition of Washington DC Super Lawyers.
  • Received the John H. Pickering Award from the firm in 2015 for his outstanding work in the areas of pro bono representation and community service.
  • Named to the Lawdragon 500 Leading Litigators in America list.

Insights & News


  • Education

    • JD, Georgetown University Law Center, 2005

      cum laude
    • BA, International Relations and Economics, Tufts University, 1996

  • Admissions

    • District of Columbia

    • Virginia

  • Government Experience

    • Federal Legislative Branch

      US Senate

      Legislative Assistant, Senator Paul Wellstone (D-MN)
    • Federal Legislative Branch

      US House of Representatives

      Legislative Director, Congressman John F. Tierney (D-MA)



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