Ms Sara Razi > Simpson Thacher & Bartlett LLP > Washington DC, United States > Lawyer Profile

Simpson Thacher & Bartlett LLP
United States
Sara Razi photo

Work Department



Sara Razi is Global Co-Chair of the Firm’s Antitrust and Trade Regulation Practice. She is a leading antitrust attorney, focusing on merger reviews, government antitrust investigations, antitrust litigation, and counseling on a variety of competition issues. Sara regularly represents clients in antitrust investigations by the DOJ, FTC and States, and has secured successful outcomes in several complex and closely-watched mergers and high-profile antitrust litigations. Her extensive private-sector and government antitrust experience spans a multitude of industries including media, telecommunications, technology, supermarkets and other retail, oil and gas, consumer products, healthcare providers, pharmaceuticals, and financial services. Representative clients include: Ahold N.V., Apax Funds, Best Buy, BMC Stock Holdings, BorgWarner Inc., Change Healthcare, CSL Ltd., Cypress Semiconductor, Dell Technologies, DIRECTV, Dollar General, HCA, Hellman & Friedman and its portfolio companies, K2M, KKR and its portfolio companies, Lorillard, Mars, McKesson, PPD and Siltronic. Sara is an authority on antitrust issues and speaks frequently at conferences sponsored by the ABA, law schools, and private organizations. She also serves as Co-Chair of the Firm’s Pro Bono Committee.


Joined in 2013 after serving at the Federal Trade Commission for nearly a decade.


Board Member, Legal Aid Society of District of Columbia


American University, Washington College of Law, (J.D. summa cum laude, Note and Comment Editor, American University Law Review, 2000); University of Colorado, (B.A. in molecular, cellular & developmental biology, 1995)

Lawyer Rankings

United States > Antitrust > Merger control

(Leading lawyers)

Sara RaziSimpson Thacher & Bartlett LLP

Simpson Thacher & Bartlett LLP is prolific in merger clearance work, handling a large pipeline of DOJ and FTC filings for corporate and private equity clients, with regular work on behalf of the likes of Blackstone, KKR, and Refinitiv, for whom the firm closed its sale to LSE Group for an estimated $27bn. Alongside its volume of work, the practice is also noted for its involvement in complex merger challenges and investigations, including multijurisdictional approvals processes, with a successful record in clearing Second Requests and other government investigations, as well as representing clients in merger litigation. The team is co-led from Washington DC by Sara Razi, a former senior FTC official with extensive knowledge of agency strategy, who advises on complex merger clearances and investigations in heavily scrutinised industries such as telecoms, media, and healthcare. New York’s Peter Guryan also heads up the team, and is noted for his work on challenging international merger clearances, recently representing TCF Bank in its $22bn merger with Huntington Bank, as well as leading on the Refinitiv deal. DC-based merger review specialist Preston Miller was promoted to partner in 2021, and offers extensive experience obtaining regulatory clearances from domestic and international competition authorities.

United States > Antitrust > Civil litigation/class actions: defense

With ‘a good mix of highly skilled partners, mid-level partners and associates’, Simpson Thacher & Bartlett LLP sports an antitrust practice that defends clients across every major industry with a deep understanding of both the DOJ and FTC. Having opened an office in Brussels in summer 2021, the firm has strengthened its international reach through close collaboration of the Brussels team with the US offices. Sara Razi and John Terzaken in Washington DC, as well as New York-based Peter Guryan head the antitrust and trade regulation practice. Also in New York, Lynn Neuner was recently appointed global co-chair of the firm’s litigation department alongside Jonathan Youngwood, whose expertise spans securities litigation and corporate control in addition to antitrust. DC-based Abram Ellis excels at antitrust matters related to financial instruments, employment issues, and the healthcare industry.