Jessica K. Delbaum


Jessica Delbaum is a partner in the firm’s Antitrust Group. Her practice focuses on defending multinational companies’ mergers and acquisitions before the Federal Trade Commission and Department of Justice as well as coordinating the multi-jurisdictional antitrust defense of transactions. Ms. Delbaum also counsels clients on an extensive array of antitrust issues such as competitor collaborations, cartel leniency applications, and Hart-Scott-Rodino Act compliance, including integration planning. Ms. Delbaum has defended substantive merger investigations involving a wide variety of industries, including health care, industrial gases, mining and finance.

Prior to joining Shearman & Sterling, Ms. Delbaum was an Attorney General’s Honors Program Attorney in the Antitrust Division of the Department of Justice. While at the Division, Ms. Delbaum investigated possible violations of the antitrust laws involving mergers and acquisitions, the reporting and waiting requirements of the Hart-Scott-Rodino Act and civil price-fixing.

Selected Experience

  • Bunge in its pending acquisition of Loders
  • Hoya in its acquisition of Performance Optics
  • Bridgepoint/Exova in the acquisition of Element Materials Technology
  • Sun Pharmaceutical in its acquisitions of Ocular Technologies, Ranbaxy Laboratories, Pharmalucence Inc., URL Pharma, DUSA Pharmaceutical and Taro Pharmaceutical and in its acquisition of Odomzo from Novartis and its licensing agreement with Merck for MK-3222
  • American Axle in its acquisition of Metaldyne Performance Group

Selected Publications

  • The network effect, Best Practices Series for Women in Business Law Group, September 2016
  • US Cartels, The Antitrust Review of the Americas, Global Competition Review, September 2016 (with Beau Buffier, Heather Kafele and Aleksandra Petkovic)
  • IP & Antitrust: United States, Global Competition Review 2016 (with Timothy Haney)
  • Mergers and Acquisitions in Antitrust Adviser, 5th Ed. (with Beau Buffier and Matthew Jennejohn)
  • Merger Remedies in the US: An Overview of Leading Cases, e-Competitions Bulletin US Merger remedies, Art. N° 66826, July 31, 2014 (with Beau Buffier)
  • Takeaways from appeal of UK hotel bookings settlement, Law360, October 2014 (with S. Mavroghenis, H. Kafele and J. Webber)
  • The EU General Court gets a rap in its knuckles, Law360, October 2014 (with S. Mavroghenis, G. Goeteyn, J. Webber and H. Kafele)

Speaking Engagements

  • E-commerce and Big Data – Innovation and the Impact on Competition (panelist), GCR Live Singapore 6th Annual Asia-Pacific Law Leaders Forum (March 2017)
  • EU/US Antitrust Enforcement Gap? (moderator), NYSBA Antitrust Law Section Annual Meeting (January 2017)
  • A View from the US, IBC Legal Big Data and Competition Law Conference (speaker) (October 2016)
  • Enforcement of AntitrustLlaws: Global Challenges (moderator), NYSBA International Section Seasonal Meeting (October 2016)
  • Joint Conduct 101:  Joint Ventures (panelist), ABA Antitrust Section Teleconference (June 2016)
  • US Antitrust laws: Practical considerations (panelist), IBC Legal Advanced EU Competition Law, London Conference, May 9, 2016
  • Mitigating Antitrust risks in mergers & acquisition transactions: What every firm needs to know in 2015 (panelist), The Knowledge Group (June 2015)
  • Practicing Before the Enforcement Agencies: New York (moderator), ABA and NYSBA Antitrust Sections Program (May 2015)


  • Harvard Law School, J.D., cum laude
    • Articles Editor, International Law Journal
  • Columbia College, Columbia University, B.A. (Economics-Philosophy), magna cum laude
Connect With Us