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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 2020

Professional Biography

WWL Ranking: Recommended

WWL says

Clients are "so incredibly impressed" with the work of Jessica Delbaum, stating: "She is highly skilled and really good at working with the agencies."
Peers and clients say:
"Jessica applies her subject matter expertise to novel sets of circumstances in different areas in a complex and highly regulated industry."
"Ms Delbaum has encyclopedic knowledge of her practice area and is able to provide timely, practical advice."
"Jessica is young but one of the real stars of the market."


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, technology, 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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