Simpson Thacher & Bartlett LLP

Simpson Thacher & Bartlett LLP has a widely-praised merger control practice, with clients spanning the chemicals, pharma, finance, entertainment and media, energy, and software industries. The team’s international reach, working closely with colleagues in the UK and EU, means that it is able to ‘operate seamlessly on trans-Atlantic transactions’. Its litigation, investigations, antitrust counselling and cartels expertise is also notable. New York-based Peter Guryan acts as global co-chair of the firm’s antitrust and trade regulation practice along with Sara Razi and John Terzaken. Guryan offers longstanding experience of civil and criminal antitrust matters, supporting major corporates and private equity funds, while Razi leverages extensive private-sector and government antitrust experience to represent clients in investigations by the Department of Justice, FTC, and states. ’A true superstar’, Preston Miller focuses his practice on merger review, while Karen Kazmerzak is ‘a natural choice for any company’ managing a complex deal before the FTC or DOJ. All attorneys based in Washington DC unless otherwise stated.