John M. Nannes



Antitrust and Regulatory Matters

Washington, D.C.

T: +1.202.371.7500

F: 1.202.661.9191


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John M. Nannes returned to Skadden as a partner in the Antitrust and Competition Group in 2001 after serving as deputy assistant attorney general and acting assistant attorney general in the Antitrust Division of the U.S. Department of Justice between 1998 and 2001.

Prior to his government service, Mr. Nannes practiced antitrust law at the firm for more than 20 years. During that time, he handled mergers and acquisitions reviewed by the Antitrust Division and the Federal Trade Commission and represented companies in civil non-merger governmental investigations and in multidistrict, treble-damage class actions. He worked frequently on antitrust problems associated with network industries such as airlines, securities and railroads. Since his return to the firm, Mr. Nannes has worked on similar matters, most of which have had international dimensions and involved the European Commission and various other competition agencies around the world, and he also has represented a number of companies in connection with U.S. and international cartel investigations.

As deputy assistant attorney general, Mr. Nannes supervised activities of the division’s sections responsible for reviewing merger and civil nonmerger activities in transportation, energy, securities and financial markets, among others.  As acting assistant attorney general, he supervised activities of all the division’s civil sections and also handled criminal matters.

Mr. Nannes is a graduate of the University of Michigan Business School and Law School.  He clerked for Judge Roger Robb on the United States Court of Appeals for the District of Columbia Circuit in 1973-1974 and then for Justice William H. Rehnquist on the Supreme Court of the United States in 1974-1975.  He served as a special assistant to the assistant attorney general in charge of the Antitrust Division for a year before joining Skadden, Arps when it opened its office in Washington in 1977.

Mr. Nannes has taught basic antitrust and advanced antitrust at Georgetown University Law Center. He is a trustee of the Legal Aid Society of Washington, D.C. and of the Supreme Court Historical Society. He previously served for six years on the pro bono committee of the District of Columbia bar.

Mr. Nannes repeatedly has been listed in Chambers Global: The World’s Leading Lawyers for Business, Chambers USA: America’s Leading Lawyers for Business and The Best Lawyers in America. He also was included in Washingtonian Magazine’s 2013 “Best Lawyers” list and The International Who’s Who of Competition Lawyers & Economists 2014, and is cited in Who’s Who Legal: Competition 2015.

Bar Admissions

New York
District of Columbia


J.D., University of Michigan Law School, 1973 (Order of the Coif; Articles Editor, Michigan Law Review)

B.B.A., University of Michigan, 1970 (with Highest Distinction)


Distinguished Visitor from Practice (1996) and Adjunct Professor of Law (1979-1981, 1983-1984), Georgetown University Law Center

Law Clerk, the Hon. William H. Rehnquist, Supreme Court of the United States (1974-1975)

Government Service

Acting Assistant Attorney General (2001) and Deputy Assistant Attorney General (1998-2001), Antitrust Division, U.S. Department of Justice