Milton A. Marquis


Washington, D.C.

(202) 471-3417

(202) 912-4817

Milton represents large companies in connection with matters involving, or having the potential to involve, State Attorneys General (AG) and other enforcement agencies across the United States. His first objective is to counsel companies on how to avoid attracting enforcement agency attention, particularly relating to consumer protection and antitrust issues. However, should an organization become the target of an investigation, he uses his many years on the front lines of enforcement to guide clients toward achieving the best possible outcome, while minimizing interruption to their business, cost, and reputational damage. Milton’s experience as an antitrust and consumer protection enforcer provides him with unique insights into the workings of enforcement agencies. This insider’s perspective, overlaid with almost two decades in private practice, offers tremendous benefits to Milton’s clients.

Milton has represented Fortune 50 companies in a range of industry sectors — including pharmaceuticals, hospitality, automotive, telecommunications, and technology — in connection with investigations and litigations involving state AGs nationwide, as well as the Federal Trade Commission and the U.S. Department of Justice. He also has an active antitrust and consumer protection counseling practice, advising companies on regulatory compliance issues, especially as related to potential mergers and acquisitions. Milton has advised companies through all stages of the Hart-Scott-Rodino premerger notification process. He has achieved considerable success working with lawyers from other firms, contributing his knowledge of AG issues and concerns on complex issues as part of a multi-faceted legal team.

Clients appreciate Milton’s ability to see the complete picture, and he strives to align a client’s current situation with its goals for the future. He works collaboratively with the client  to reach resolutions free from restrictions that would place the client at a competitive disadvantage, and that minimize any harm to the client’s reputation or business standing.

Milton served as senior counsel to the assistant attorney general for antitrust, U.S. Department of Justice (DOJ), where he served as the Antitrust Division’s first liaison to state attorneys general.

Prior to his service at the DOJ, Milton served as an antitrust and consumer protection litigator in the offices of the attorneys general of Massachusetts and Virginia. 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 is a member of Cozen O'Connor's board of directors. He currently serves on the Advisory Board of the American Antitrust Institute and is a long-time member of the National Bar Association. Milton also serves as a trustee of Case Western Reserve University.



More Than 200 Cozen O’Connor Attorneys Named Best Lawyers and Ones to Watch By The Best Lawyers In America

August 20, 2020

Best Lawyers selected 201 Cozen O’Connor lawyers from 23 of the firm’s nationwide offices for inclusion in the 2021 edition of The Best Lawyers in America© (Copyright 2020 by Woodward/White, Inc., of Aiken, SC).

Fourteen Cozen O’Connor Attorneys Recognized as Washington, D.C., Super Lawyers and Rising Stars

April 20, 2020

Super Lawyers has named 14 Cozen O'Connor attorneys to its 2020 Washington, D.C., Super Lawyers and Rising Stars list.

138 Cozen O’Connor Attorneys Named to the Best Lawyers in America

August 28, 2019

Best Lawyers selected 138 Cozen O’Connor lawyers from 21 of the firm’s national offices for inclusion in the 2020 edition of The Best Lawyers in America.

13 Cozen O'Connor Attorneys Recognized as Washington, D.C. Super Lawyers and Rising Stars

April 25, 2019

The 2019 Washington, D.C, edition of Super Lawyers Magazine, published by Thomson Reuters, has named 13 Cozen O’Connor attorneys to its list of Super Lawyers and Rising Stars.

126 Cozen O’Connor Attorneys Named to the Best Lawyers in America

August 22, 2018

One hundred twenty-six Cozen O’Connor lawyers from 20 of the firm’s national offices have been selected for inclusion in the 2018 edition of The Best Lawyers in America.

Washington, D.C. Super Lawyers Recognizes 15 Cozen O'Connor Attorneys

May 15, 2018

Fourteen Cozen O’Connor attorneys have been named 2018 Super Lawyers or Rising Stars by Super Lawyers Magazine Washington, D.C. edition, published by Thomson Reuters.

Milton Marquis Elected to Case Western Reserve Board of Trustees

June 30, 2015

Milton A. Marquis, a member of Cozen O’Connor’s State Attorneys General Practice, has recently been elected to the Board of Trustees for Case Western Reserve University. Milton focuses his practice on antitrust and consumer protection litigation. As a member of the nation’s leading State Attorneys General Practice, Milton has represented major companies on a wide range of antitrust and consumer protection investigations and litigations and legal and policy matters involving state attorneys gen

Cozen O’Connor Launches New State Attorneys General Practice with Addition of Nationally Acclaimed State AG Practice

May 05, 2015

On the heels of its recent announcement of the addition of 60 lawyers in Chicago, Cozen O’Connor is proud to announce the addition of ten attorneys and government professionals and the formation of the firm’s State Attorneys General Practice.


State Attorneys General Antitrust Enforcement: Trends and Insights

August 26, 2019

Milton Marquis, Ann-Marie Luciano & Keturah Taylor published an article highlighting the growing role of State Attorneys General utilizing their antitrust authority on a national scale through multistate action and co-enforcement activity with their federal counterparts.

FTC and DOJ Issue Guidance on Application of Antitrust Law to Employee Hiring and Compensation [Labor & Employment Alert]

October 25, 2016

The FTC and the DOJ jointly released Antitrust Guidance for Human Resources Professionals, advising that, going forward, the DOJ intends to criminally investigate companies who agree with competitor(s) to fix wages or other terms of employment or enter into so-called “no-poaching” agreements by agreeing not to recruit each other’s employees.

The State AG Report Weekly Update October 29, 2015 [The State AG Report Blog]

October 29, 2015

Consumer Protection FTC Settles with Mobile Service Provider for Alleged Fair Credit Reporting Act Violations The Federal Trade Commission (“FTC”) reached a settlement with Sprint Corporation to resolve allegations it violated the Fair Credit Reporting Act (“FCRA”) and its Risk-Based Pricing Rule,...

The State AG Report Weekly Update October 1, 2015 [The State AG Report Blog]

October 01, 2015

Campaign Finance Washington Attorney General Sues Employee Union and PAC for Alleged Campaign Finance Violations Washington AG Bob Ferguson filed a lawsuit against the Service Employees International Healthcare 775NW (“SEIU 775”) and political action committee SEIU 775 Quality Care Committee...

The State AG Report Weekly Update August 20, 2015 [The State AG Report Blog]

August 20, 2015

Antitrust Alaska Attorney General Denies LNG Acquisition Citing Anticompetitive Concerns Alaska AG Craig Richards rejected the proposed acquisition of a liquefied natural gas (“LNG”) facility in Port MacKenzie by Harvest Alaska, a subsidiary of Hilcorp Energy (“HilCorp”), over concerns that the...

The State AG Report Weekly Update July 2, 2015 [The State AG Report Blog]

July 02, 2015

Antitrust Second Circuit Upholds Ruling Against Apple for E-Book Price Fixing Conspiracy The U.S. Court of Appeals for the Second Circuit upheld a District Court ruling, finding that Apple orchestrated a conspiracy among book publishers to fix prices for e-books. A lawsuit was brought by 33...

The State AG Report Weekly Update May 21, 2015 [The State AG Report Blog]

May 21, 2015

Breaking News FTC, All Fifty States, and DC Sue Four Cancer Charities for Deceptive Practices The Federal Trade Commission and Attorneys General and other law enforcement personnel from all fifty states and the District of Columbia filed a lawsuit against Cancer Fund of America, Inc., Cancer...

2017 Guide to State Attorneys General [Map]

May 05, 2015

The guide includes information on attorney generals in all 50 states, the District of Columbia, Commonwealth, and Territories of the United States, including a photos, year first elected or appointed, political party affiliation, leadership positions and brief background summaries.

Industry Sectors


  • Case Western Reserve University School of Law, J.D., 1984
  • University of Georgia, B.A., 1979

Awards & Honors

Lawyers of Color Power List Honoree 2020

Best Lawyers in America 2019-2021

  • District of Columbia