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 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 on related compliance issues. He also regularly advises clients on potential acquisitions from an antitrust perspective. Milton 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

Representative Experience

  • Successfully resolved investigations by multiple AGs regarding a Fortune 100 company's marketing of ancillary mobile telephone products.

  • Obtained AG antitrust clearances of multiple mergers in a variety of industries.

  • Representation of a Fortune 100 pharmaceutical company in several State Attorney General consumer protection and antitrust investigations and litigation involving the marketing and sales of prescription medicines and other products.

  • Representation of a Fortune 100 chemical 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 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 a Fortune 500 health care company in consumer protection investigations and litigation involving State Attorneys General.

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

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News and Views

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Honors and Awards

  • Washington, DC Super Lawyers

  • Washington, DC Super Lawyers

  • Washington DC Super Lawyers

Bar Admissions

District of Columbia


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