Milton A. Marquis

State Attorneys General

1825 Eye Street NW Washington, DC 20006-5403
T: (202) 420-2659


Milton Marquis joined Dickstein Shapiro in 2002. He is a partner in the State Attorneys General Practice and has developed an active antitrust and consumer protection litigation practice. He served with the government for 14 years at the U.S. Department of Justice and the offices of the Attorneys General of Virginia and Massachusetts. In private practice, Milton has represented major companies, including AT&T, Pfizer, and DuPont, on a wide range of antitrust and consumer protection investigations and litigations involving State Attorneys General across the United States, as well as the Federal Trade Commission and U.S. Department of Justice.


Antitrust and Consumer Protection Practice

Milton represents several of the largest companies in the United States before State Attorneys General, the U.S. Department of Justice, and Federal Trade Commission on antitrust and consumer protection investigations and litigations.

Milton also has an active antitrust and consumer protection counseling practice, advising companies such as Duke Energy, DuPont, and Fannie Mae regarding antitrust and consumer protection compliance issues. Milton also regularly advises clients on potential acquisitions from an antitrust perspective. He has advised companies through all stages of the Hart-Scott-Rodino pre-merger notification process, including Harbour Group and Gladstone Corporation.


Milton served as senior counsel to the Assistant Attorney General for Antitrust, U.S. Department of Justice, during the Clinton Administration. In this capacity, he advised the Assistant Attorney General on a wide range of issues, including energy and healthcare. Milton served as the Antitrust Division’s first liaison to State Attorneys General. Prior to his service at the Justice Department, Milton served as an antitrust and consumer protection litigator in the offices of the Attorneys General of Massachusetts and Virginia, where he handled litigations and investigations involving many industries, including soft drink, automobile, retail, agriculture, healthcare, and waste disposal. During his tenure as a state antitrust prosecutor, Milton was a leading member of the Multistate Antitrust Task Force of the National Association of Attorneys General.


Milton has served in various leadership positions in the Section of Antitrust Law of the American Bar Association, including chair of the Civil Litigation and Procedure Committee, and vice chair of the Corporate Counseling Committee. He currently serves on the Advisory Board of the American Antitrust Institute. He also is a long-time member of the National Bar Association.

Full Biography

Matter Experience

  • Representation of AT&T in several State Attorneys General multistate consumer protection investigations.

  • Representation of AT&T in the SBC/AT&T and AT&T/Bellsouth State Attorney General merger investigations.

  • Representation of Pfizer in several State Attorney General consumer protection and antitrust investigations and litigation involving the marketing and sales of prescription medicines and other Pfizer products.

  • Representation of E.I. DuPont de Nemours and Company in several antitrust and consumer protection investigations and litigations before State Attorneys General, Federal Trade Commission, and U.S. Department of Justice involving a wide range of DuPont businesses, including agriculture, chemicals, and packaging graphics.

  • Representation of several for-profit colleges in consumer protection investigations before State Attorneys General in several states.

  • Representation of Baxter Healthcare in consumer protection investigations and litigation involving State Attorneys General.

  • Representation of Time Warner Cable in a State Attorney General consumer protection investigation.

  • Representation of Time Warner in the investigations by several State Attorneys General of the Time Warner Cable/Adelphia merger.

  • Representation of a major beverage manufacturer in consumer protection investigations involving the Federal Trade Commission and a multistate task force of State Attorneys General.

View all Experience

News and Views

View all News and Views

Honors and Awards

  • Washington, DC Super Lawyers

  • Washington, DC Super Lawyers

  • Washington DC Super Lawyers

Bar Admissions

District of Columbia


State AGs in the News

Recent posts from State AG Monitor

2014 Election ACC Webcast: Post-Election Analysis of the New Attorney General Landscape Dickstein Shapiro and the Association of Corporate Counsel (ACC) are partnering for a webcast on Wednesday, November 5 at 3:00 PM EST for a post-election analysis of the new Attorney General landscape. Bernie Nash, head of Dickstein Shapiro’s State AG practice will lead... Continue Reading