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Who's Who Legal
Who's Who Legal
Thought Leaders

Thought Leaders

Thought Leader

Thought Leaders - Competition 2021
WWL Ranking: Thought Leader

Global Leader

Competition 2021

Professional Biography

WWL Ranking: Recommended

Peers and clients say:

"Jessica is a very strong name in the competition field"
"Her level of expertise is beyond that of her peers"
"She is an extremely experienced and knowledgeable partner who is able to solve most complicated tasks"


Jessica Delbaum is a partner in Shearman & Sterling's antitrust practice. Her practice focuses on defending multinational companies’ mergers and acquisitions before the Federal Trade Commission and Department of Justice, as well as coordinating the multijurisdictional 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 in the health care, agriculture, publishing, chemicals, retail and finance sectors.

Prior to joining Shearman & Sterling, Ms Delbaum was an attorney general’s honours programme 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.

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