Michael Keeley is a leading antitrust lawyer, with more than 25 years of experience. He has obtained antitrust clearance for large and complex strategic mergers, and tried monopolisation and patent jury cases. Mr Keeley has particular experience in defending litigated merger challenges, including the Antitrust Division's challenges to SunGard/Comdisco and the sale by Tyson Foods of a poultry processing complex to George's Foods.

Mr Keeley’s recent M&A work includes Dell’s $67 billion acquisition of EMC; Tyson Foods’ acquisitions of Keystone Foods and American Proteins; and Thermo Fisher Scientific's $13.6 billion acquisition of Life Technologies, as well as a series of strategic acquisitions for private equity clients.

Mr Keeley represented Momenta Pharmaceuticals in a series of antitrust cases involving patent enforcement, as well as another leading generic pharmaceuticals manufacturer in the ongoing price-fixing litigations.

A member of the ABA section of antitrust law, Mr Keeley currently serves as the co-chair of the mergers and acquisitions committee (2018–present) and previously served as the committee’s vice chair. Mr Keeley was also a member of the ABA section of antitrust law's task force on foreign investment (2013–2015). He received his BS from Fordham University in 1992 and his JD from Fordham University School of Law in 1995.