Jon B. Dubrow is co-head of McDermott’s antitrust Mergers Focus Group and assists clients across a host of inter-related antitrust issues, including mergers and acquisitions (M&A) transactions / merger clearance, counseling and litigation. Jon leads the defense of mergers, acquisitions and joint ventures before the Department of Justice, the Federal Trade Commission and foreign competition authorities. He also regularly assists third parties whose interests are adversely affected by proposed transactions. Jon also is experienced in antitrust litigation. He provides counseling on distribution issues, contracting arrangements and a wide variety of other competition-related matters.

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  • Obtained regulatory clearance in multiple acquisitions for numerous clients, including Amgen, Constellation Brands, Diageo, Medtronic, Blackboard, Lockheed Martin, Martin Marietta Materials, Premier, Inc., Worthington Industries, and many private equity sponsors
  • Obtained merger clearance for Martin Marietta Materials’ $2.7 billion acquisition of Texas Industries and $1.7 billion acquisition of Bluegrass Materials

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  • Washington, DC Super Lawyer, Antitrust 2020
  • The Best Lawyers in America 2019, Antitrust Law
  • Chambers USA 2015 to 2020
  • The Legal 500 United States 2016 to 2019

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  • American Bar Association, member of Antitrust Section committees, including Health Care & Pharmaceuticals, Clayton Act, Transportation & Energy and Unilateral Conduct, and of the Public Contracts Law Section, Strategic Alliance, Subcontract and Teaming subcommittee


University of Pennsylvania Law School, JD, cum laude, Order of the Coif, 1992
University of Virginia, BA, 1988

District of Columbia

Jon B. Dubrow

Insights & Events / Media

Webinar / McDermott Event / September 10, 2019

Antitrust M&A Snapshot / AUGUST 2019

Antitrust M&A Snapshot / March 2019

Antitrust M&A Snapshot / November 2018

International News / April, 2006