Katrina Robson


Thank you for your interest. Before you communicate with one of our attorneys, please note: Any comments our attorneys share with you are general information and not legal advice. No attorney-client relationship will exist between you or your business and O’Melveny or any of its attorneys unless conflicts have been cleared, our management has given its approval, and an engagement letter has been signed. Meanwhile, you agree: we have no duty to advise you or provide you with legal assistance; you will not divulge any confidences or send any confidential or sensitive information to our attorneys (we are not in a position to keep it confidential and might be required to convey it to our clients); and, you may not use this contact to attempt to disqualify O’Melveny from representing other clients adverse to you or your business. By clicking "accept" you acknowledge receipt and agree to all of the terms of this paragraph and our Disclaimer.


Katrina M. Robson represents clients in complex, high-profile antitrust and competition litigation against both government agencies and private parties. Her work has made material differences in the business of some of the country’s most recognized companies.  Katrina held a pivotal role in the high-profile US Airways-American Airlines antitrust litigation that temporarily held up the groundbreaking US$17 billion merger and obtained early antitrust clearance for General Mills’ acquisition of organics icon Annie’s.

Katrina has extensive experience briefing and litigating disputes, having worked on appellate briefs, argued before the Ninth Circuit, and participated in multiple trials and evidentiary hearings. She has achieved precedential decisions in antitrust litigation, including obtaining summary judgment on a motion for reconsideration for gaming technology company IGT, subsequently affirmed by the Federal Circuit, and dismissal of plaintiffs’ price-fixing claims against Marriott in MDL proceedings.


Honors & Awards

  • Recognized for Antitrust Law (2017-2020), Merger Control (2019-2020), and General Commercial Disputes (2018) by The Legal 500 US
  • Featured in “Leadership, Partnership, and Women in the Law: How This Firm Got it Right,” Ms. JD (2015)


Bar Admissions

  • District of Columbia
  • California


  • Harvard University, J.D.: Executive Editor, Journal of Law and Public Policy; President, Board of Student Advisers
  • University of California at Santa Barbara, M.A., Education
  • University of California at Santa Barbara, B.A., English: Phi Beta Kappa

Professional Activities


  • Editorial Board, Consumer Protection Law Developments (2013)
  • Board of Directors, Beckstrand Cancer Foundation (2006-2008)


  • American Bar Association, Franchise and Distribution Committee, Antitrust Section


  • Panelist, “Full compensation for injured parties: where do we stand more than four years after the adoption of the Antitrust Damages Directive?” GCR Live 11th Annual Brussels Conference: The Bigger Picture (July 2019)

Contributing Author

  • 2011 Consumer Protection Law Developments Update


  • “The New Landscape of Children’s Online Privacy,” Corporate Counsel (August 2013)
  • “FTC v. Actavis: Reconciling Conflicts in Rule of Reason,” Law360 (July 2, 2013)
  • “The Law of Loyalty Discounts: Two and a Half Theories,” Corporate Counsel (June 21, 2013)
  • "The Impact of Wal-Mart v. Dukes on Antitrust Class Action Defense," ABA Antitrust Business Torts & Civil RICO Committee (August 2011)
  • "Assessing the Reasonableness of the Rule of Reason: The World after Leegin," International Antitrust Law & Policy: Fordham Competition Law 2009
  • "The Stimulus Bill and the Electric Industry," ABA Infrastructure (Spring 2009)
  • Defended AT&T and Time Warner in the biggest merger case in decades, defeating an attempt by the DOJ’s Antitrust Division to block the US$85.4 billion merger between the telecom and media giants; after five weeks of testimony, a federal judge rejected the government’s theories, denied the government’s request for an injunction, and imposed no conditions on the parties.
  • Representing Marriott in MDL proceedings involving alleged resale price maintenance and price fixing in the hotel industry.
  • Represented US Airways in litigation against the DOJ regarding its merger with American Airlines.
  • Defended manufacturer of a weight loss product in a FTC investigation involving the substantiation of advertising claims and the proper use of disclaimers.
  • Represented Agrium in MDL proceedings involving alleged price fixing in the potash industry.

Alerts and Publications

DOJ and FTC Issue New Vertical Merger Guidelines

7월 1, 2020

Germany’s Federal Cartel Office Calls for the EU Court of Justice’s Guidance on Important Patent Licensing Issues

6월 25, 2020

Germany’s Supreme Court Sides with National Antitrust Enforcer in Facebook Abuse of Dominance Case

6월 23, 2020

May Price Gouging Update

6월 4, 2020

Updates on Recent US Merger Control Developments - May 2020

5월 22, 2020

New Proposed Legislation in California Increases Antitrust Scrutiny in M&A and Other Activities in the Healthcare Industry

5월 19, 2020

COVID-19 Antitrust M&A Considerations

5월 7, 2020

Collusion in the Healthcare Industry: DOJ Charges Oncology Group for its Participation in a Criminal Antitrust Conspiracy

5월 6, 2020

Price Gouging Update—April 2020

4월 30, 2020

Gun-Jumping Concerns for Pending Transactions When There Is No Such Thing as “Ordinary Course of Business”

4월 27, 2020

The Failing Firm Merger Defense in Times of Economic Turmoil: Past Lessons and the COVID-19 Crisis

4월 23, 2020

Antitrust Agencies Watch for Labor Market Collusion in the Healthcare Industry

4월 20, 2020

DOJ and FTC on Alert for Anticompetitive Conduct in Labor Markets for COVID-19 Essential Workers

4월 15, 2020

Nationwide Shortages Open New Frontiers in Fight Against COVID-19-Related Price Gouging

4월 14, 2020

Hong Kong Competition Commission Consults on Proposed Commitments Offered by Online Travel Agents to Remove Parity Clauses from Agreements with Accommodation Providers

4월 9, 2020

China Adopts Antitrust Enforcement Policy to Fight COVID-19 and Spur Economic Recovery

4월 8, 2020

Antitrust Implications of the President’s Invocation of the Defense Production Act

4월 2, 2020

Department of Health and Human Services Triggers Price Gouging and Hoarding Provisions of Defense Production Act

4월 1, 2020

Hong Kong Competition Commission Issues Statement on the Application of the Competition Rules to Cooperation Agreements Between Companies Responding to the COVID-19 Pandemic

3월 30, 2020

Competitor Collaborations and Communications in Time of Crisis: Practical Guidance

3월 26, 2020

Antitrust Agencies Provide Guidance for Competitor Collaborations in Healthcare Sector as COVID-19 Outbreak Deepens

3월 25, 2020

European Antitrust in the Time of COVID-19

3월 25, 2020

Antitrust Enforcers to be Active Monitoring Marketplace Activity Related to COVID-19

3월 20, 2020

US Antitrust Agencies Continue to Focus on Common Ownership

2월 22, 2019

In the News

Press Releases