Gregory E. Neppl


Greg Neppl’s antitrust practice focuses on antitrust counseling, merger analysis and HSR notification preparation, government investigation response, antitrust compliance program development, and litigating antitrust and intellectual property matters. He also counsels numerous hedge funds and other institutional investors pursuing event-driven and risk arbitrage investment strategies. Greg has significant jury and bench trial experience from his private and government practices. He is a partner in Foley’s Antitrust & Competition, Government Enforcement Defense & Investigations, and Trade Association Practices.

Prior to joining Foley, Greg served as Senior Antitrust and Regulatory Counsel for Litton Industries, Inc., a subsidiary of Northrop Grumman Corporation as of 2001. In that position, he provided day-to-day antitrust counseling to defense and aerospace businesses; advised on teaming agreements, strategic alliances, and patent licenses; prepared HSR notifications and facilitated agency approvals; responded to antitrust agency investigations and inquiries; and developed and implemented antitrust compliance training programs.

Greg also previously served as a Trial Attorney with the Antitrust Division of the U.S. Department of Justice (Litigation II Section). In that role, he conducted numerous civil and criminal antitrust investigations. He also served as Special Assistant U.S. Attorney in Washington, D.C., where he prosecuted criminal matters in D.C. Superior Court. Prior to joining the Department of Justice, Greg practiced as a general commercial litigator in Tampa, Florida.

Awards and Recognition

  • Peer Review Rated as AV® Preeminent™, the highest performance rating in Martindale-Hubbell’s peer review rating system


  • Knight, International Order of Saint Hubertus
  • The Federalist Society

Presentations and Publications

  • Author, “2022 Antitrust Outlook – Significant Changes Under the Biden Administration,” Top Legal Issues Facing the Automotive Industry in 2022, Foley Insights, March 17, 2022.
  • Co-author, “President Biden’s Executive Order on Competition Could Mean Broad Changes Across a Range of Industries,” Foley Insights, July 15, 2021.
  • Author, “2021 Antitrust Outlook – A New Administration and State Activism Present  Enforcement Uncertainty,” Foley Insights, April 7, 2021.
  • Author, “2020 Antitrust Outlook – Antitrust Agency Divergence, the Standards Debate and State Activism Present Enforcement Uncertainty,” Top Legal Issues Facing the Automotive Industry in 2020, Foley Insights, February 12, 2020.
  • Author, “DOJ Issues Merger Remedies Manual – Structural Remedies ‘Strongly Preferred’,” Foley Insights, September 11, 2020.
  • Co-author, “FTC and DOJ Issue Final Vertical Merger Guidelines,” Foley Insights, July 22, 2020.
  • Author, “Antitrust Enforcement ‘Reform’ as a Political Issue: The Good, the Bad, and the Ugly,” Foley Insights, November 7, 2019.
  • Author, “Antitrust Surprises from DOJ during the Trump Administration – Predicting the Consequences,” Foley Insights, October 10, 2019.
26 March 2024 Deals and Wins

Foley Represents Avantus in Investment from KKR to Support Renewable Energy Development

Foley & Lardner LLP served as legal advisor to Avantus in its signing of a definitive agreement by which investment funds and accounts managed by KKR.
13 March 2024 Deals and Wins

Foley Advises mdf commerce in Agreement to be Acquired by KKR

Foley & Lardner LLP served as U.S. legal advisor to mdf commerce, a SaaS leader in digital commerce technologies, in its definitive agreement to be acquired by funds managed by KKR.
05 February 2024 Article

Hart-Scott-Rodino Reporting Threshold Increases by $8.1 Million

On February 5, 2024, the Federal Trade Commission (FTC) published a Notice in the Federal Register announcing the latest annual adjustments to the reporting thresholds under the Hart-Scott-Rodino Antitrust Improvements Act of 1976.
17 January 2024 Deals and Wins

Foley Represents Barnes Group in Sale of Associated Spring™ and Hänggi™ Businesses

Foley & Lardner LLP served as legal advisor to Barnes Group Inc., a global provider of highly engineered products, differentiated industrial technologies, and innovative solutions, in its entering into a definitive agreement to sell its Associated Spring™ and Hänggi™ businesses to One Equity Partners.
10 January 2024 Deals and Wins

Foley Represents Subsidiaries of American Electric Power Company and PNM Resources in Agreement to Sell New Mexico Solar Assets

Foley represented subsidiaries of American Electric Power and PNM Resources in the agreement to sell their renewables joint venture, New Mexico Renewable Development, LLC, to Exus North America Holdings, LLC for approximately $230 million.
20 December 2023 Article

DOJ and FTC Release Significantly Expanded Merger Guidelines

On December 18, 2023, the U.S. Department of Justice Antitrust Division and Federal Trade Commission released a significant revision and expansion to the federal Merger Guidelines, the document that lays out the framework for how the Agencies will analyze mergers for potential antitrust concerns.