Dionne C. Lomax

Managing Director, Antitrust and Trade Regulation

Boston, MA / Washington, D.C.


Dionne Lomax is Managing Director of Antitrust and Trade Regulation at Affiliated Monitors, Inc. Ms. Lomax also teaches Business Law at Boston University’s Questrom School of Business and co-teaches a Health Care Competition seminar at the Boston University School of Law. Prior to joining AMI, Ms. Lomax dedicated her legal career to analyzing complex business transactions from an antitrust regulatory perspective.

Ms. Lomax represented high-profile clients in various commercial transactions across a wide range of industries for over 20 years. She was a Partner in the Washington, D.C. office of Mintz Levin, where her antitrust work included representing large health systems, major medical associations, large multi-specialty physician groups, pharmaceutical companies, and medical device manufacturers in connection with mergers and acquisitions, joint ventures, and other commercial arrangements. She was also a Partner in the Washington, D.C. office of Vinson & Elkins LLP, where she represented clients before the U.S. Department of Justice, Federal Trade Commission, and various State Attorneys General in connection with mergers and other commercial transactions in a number of industries, including health care, energy, chemical products, investment management (e.g., private equity), and technology (e.g., computers, semiconductors, software).

Ms. Lomax’s transactional experience, while focused on antitrust regulatory issues, has exposed her to the entire spectrum of M&A activity. She has: (1) counseled clients during the bidding process as they made critical decisions regarding strategic partners; (2) analyzed key aspects of asset purchase agreements to protect client interests and ensure adherence to antitrust statutes; (3) provided critical guidance on information exchange and related issues during pre-merger negotiations and due diligence; and (4) represented clients before state attorneys general and federal antitrust authorities to obtain clearance for various matters under investigation. In addition, she has served as trusted legal counsel for numerous hospitals and health systems. Her counseling experience includes: (1) advising providers on the collective provision of fee and non-fee related information to the purchasers of health care services; (2) guiding health care providers regarding the legality of joint purchasing arrangements; (3) analyzing exclusive dealing arrangements; and (4) developing antitrust compliance policies and training programs.

Ms. Lomax has been a featured speaker at numerous conferences on topics regarding the antitrust treatment of provider mergers and affiliations and was a panelist at the Examining Health Care Competition Workshop sponsored by the FTC and DOJ in 2015. She also served as an Adjunct Professor of Antitrust Law at the School of Law at Loyola University of Chicago.

Prior to entering private practice, Ms. Lomax served as a Trial Attorney at the U.S. Department of Justice Antitrust Division’s Health Care Task Force where she analyzed the structure and operation of PHOs and IPAs, investigated health plan mergers, and other collaborative arrangements in the health care industry. She clerked for The Honorable Clifford Scott Green in the United States District Court for the Eastern District of Pennsylvania.

Ms. Lomax received her J.D. from the University of Pennsylvania, and graduated from Howard University summa cum laude, with a B.B.A. in finance.