M. Sean Royall Sidley Austin


Sean Royall has spent his entire career handling complex antitrust litigation matters and government investigations and is among the country’s most experienced and highly regarded antitrust lawyers. He focuses on antitrust and consumer protection litigation and government investigations and serves as a co-leader of the firm’s global Antitrust and Consumer Protection litigation and investigations practice. He previously served at the Federal Trade Commission (FTC) as the Deputy Director of the FTC’s Bureau of Competition. His antitrust career, both in government and private practice, has included work on many major mergers and acquisitions, as well as lead roles in complex litigation matters that often intersect with other areas of law, including patent law, various federal regulatory regimes, consumer protection, and privacy. Sean has deep experience representing clients across a range of industries, including pharma, healthcare, e-commerce, telecom, financial services, energy, transportation, software, and semiconductors. Sean also has a nationally prominent reputation for his work in the consumer protection area, where he has particularly deep experience leading FTC investigations focused on advertising, marketing, privacy, and data security issues. Sean brings to this area of his practice deep insight and appreciation of enforcement priorities of a former government prosecutor and the skills of an accomplished litigator.

2020 Awards


Nominee, 2020 Antitrust Writing Awards: Academic, Procedure

Nominee, 2019 Antitrust Writing Awards: Business, Procedure

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