Courtney Dyer


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Courtney Dyer, Managing Partner of O’Melveny’s Washington, DC office, steers companies through increasingly complex government antitrust investigations and helps them navigate an evolving antitrust enforcement landscape.  

Courtney has extensive experience defending proposed and consummated mergers and acquisitions before the US antitrust agencies. She is adept at analyzing complex transaction structures and advising clients on appropriately managing antitrust risk before agreements are executed. Focusing on the clients’ strategic objectives and supported by O’Melveny’s global antitrust team, Courtney crafts merger control strategies to achieve these objectives efficiently.


Honors & Awards

  • Recognized by Who's Who Legal as a Thought Leader in Competition (2023)
  • Named to the “500 Leading Litigators in America” list for Antitrust & Competition Law, including M&A, Investigations, Litigation by Lawdragon (2022)
  • Recognized by The Legal 500 US in both Antitrust: Civil Litigation/Class Actions (2016) and Antitrust: Merger Control (2017-2023)


Bar Admissions

  • District of Columbia
  • New York


  • George Washington University, J.D.: with high honors; Order of the Coif
  • University of Richmond, B.S., Finance and Economics: cum laude

Professional Activities


  • American Bar Association, Antitrust Section



  • Mergers and Acquisitions: Understanding the Antitrust Issues, (4th ed.), ABA Section of Antitrust Law (2015)
  • Antitrust Law Developments (7th ed.), ABA Section of Antitrust Law (2012)


  • Moderator, “Resale Price Maintenance: Current State of Play in North America and Europe,” American Bar Association (2019)
  • “‘Nuts and Bolts’ of Responding to a Governmental Second Request”, American Bar Association, Federal Civil Enforcement Section of Antitrust Law (2015)


  • Our Curious Amalgam, “Would Anything Have Changed? The Use of the Failing Firm “Defense” in Merger Control,” Speaker, ABA (July 20, 2020)
  • Represented Alaska Airlines and obtained DOJ clearance of its merger with Virgin America.
  • Obtained regulatory clearances on behalf of Finisar for its acquisition by II-VI.
  • Obtained regulatory clearances on behalf of Microsemi for its acquisition by Microchip.
  • Obtained DOJ clearance on behalf of Dealertrack Technologies Inc. for its acquisition by Cox Automotive.
  • Obtained FTC clearance on behalf of CoreLogic, Inc. for its acquisition of Marshall & Swift/Boeckh, DataQuick Information Systems, and certain businesses of DataQuick Lending Solutions.
  • Obtained DOJ clearance for Schoolwires for its acquisition by Blackboard Inc.
  • Obtained FTC clearance for General Mills’ for its acquisition of Annie’s.
  • Obtained FTC clearance on behalf of MakerBot in its sale to Stratasys.

In the News

Global Legal Chronicle: Allegro MicroSystems US$420 Million Acquisition of Crocus Technology

August 21, 2023

Global Legal Chronicle: PW Consortium’s US$1.84 Billion Merger With PureWest Energy

June 6, 2023

Law360: 3 Firms Build US$218M Merger Of Samsung Display, eMagin

May 17, 2023

The Texas Lawbook: CDT Roundup: 11 Deals, 10 Firms, 102 Lawyers, US$2.8B - Next Bridge Hydrocarbons, Inc.

January 18, 2023

Global Competition Review: The Tipline for 13 October 2022 Tractor Supply

October 13, 2022

Global Competition Review: Publishing Duo Label DOJ Market ‘Artificial’ at Close of Trial

August 22, 2022

Law360: Book Publishers Say DOJ Hasn’t Shown Harm To Authors

August 19, 2022

Law360: Court Questions Penguin’s Bid Policy In Merger Challenge

August 18, 2022

Law360: Publishing Merger Won’t Hurt Competition, Yale Prof Says

August 16, 2022

Law360: Penguin Exec. Says Internal Book Competition Is Strong

August 15, 2022

Law360: Author, Agents Say Advances Only Part Of Puzzle

August 11, 2022

Global Competition Review: DOJ’s Expert: New Publisher Unlikely to Replace Simon & Schuster

August 10, 2022

Law360: Agent Says Authors Want Best Deal, Not Most Upfront Money

August 10, 2022

Law360: Penguin CEO Says Simon & Schuster Deal Is For Market Share

August 4, 2022

Law360: DOJ Tells Judge Book Merger Would Reduce Author Pay

August 1, 2022

The American Lawyer: More Than 2,000 Women Partners Issue Call to Action Post-‘Dobbs’

June 27, 2022

Competition Policy International: Using the Horizontal Merger Guidelines to Evaluate Labor Market Effects of Mergers

May 11, 2022

Law360: DOJ’s Penguin-Simon & Schuster Challenge Eyes August Trial

December 10, 2021

Press Releases


Alerts and Publications

Proposed Overhaul of HSR-Filing Process Will Lengthen Deal Timelines and Likely Lead to More Agency Investigations

June 29, 2023

FTC Announces New 2023 HSR Reporting Thresholds and Filing Fees

January 24, 2023

FTC Proposes New Rule That Would Ban Non-Compete Agreements

January 10, 2023

HSR Filing Fees to Increase Dramatically for Large Transactions, Funding Larger Budgets and More Enforcement at the Antitrust Agencies

January 5, 2023

Making History: Six Strategic Trials in a Blockbuster Year of Antitrust Litigation

December 13, 2022

Eleventh Circuit Holds That a Franchisor and Its Franchisees May Violate Sherman Act by Entering Into No-Hire Agreements

September 12, 2022

DOJ Breathes New Life into Section 2 Criminal Enforcement

March 8, 2022

FTC Announces New 2022 HSR Reporting Thresholds and Renews Call to Congress for Additional Funding

January 25, 2022