Gregory (Greg) Heltzer analyzes the antitrust implications of most transactions involving a publicly traded company – including over 800 in the last decade. Greg focuses his practice on defending mergers and acquisitions and has successfully defended mergers for DaVita, Mars, Martin Marietta Materials, Olam, TreeHouse Foods, Motorola Solutions, Le Duff America, JAB Partners (Coty), Aleris, and Blackboard among others. His advice allows C-Suite decision makers to ensure that time and money are not wasted on potential transactions without a viable path for clearance. When transactions move forward, Greg guides clients through the clearance process with a focus on providing enforcers with the information needed so that the merging parties can avoid or at the very least significantly reduce the scope of a costly/time-consuming Second Request. In addition, he handles complex antitrust litigation, government investigations and antitrust counseling.

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  • Martin Marietta Materials in multiple acquisitions, including Bluegrass Materials (aggregates)
  • Motorola Solutions in multiple acquisitions, including Airbus DS Communications and Spillman Technologies (software)
  • Le Duff America in its sale of Bruegger’s Bagels to JAB Holding Co. (quick service restaurants)

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  • The Legal 500 United States 2019
  • Super Lawyers, Rising Star 2016 and 2017


  • American Bar Association, Antitrust Section


Georgetown University Law Center, JD, cum laude, 2003
Dartmouth College, AB, 1999

District of Columbia

Courts / Agencies
US District Court for the District of Columbia

Gregory E. Heltzer

Insights & Events / Media

Virtual Event Series / McDermott Event / January 21 – February 4, 2021

Webinar / Speaking Engagements / June 14, 2017

Today's General Counsel / June 13, 2017

Corporate Counsel / March 22, 2017