PRA Health Sciences, Inc. entered into an Agreement and Plan of Merger, dated as of February 24, 2021, with ICON plc, ICON US Holdings Inc. subsidiary of ICON, and Indigo Merger Sub, Inc. subsidiary of ICON and US HoldCo. On July 1, 2021, upon the terms and subject to the conditions set forth in the Merger Agreement, Merger Sub merged with and into PRA, with PRA surviving as a subsidiary of ICON and US HoldCo. In connection with the consummation of the Merger, in accordance with the Merger Agreement, each of Colin Shannon, Jeffery T. Barber, Alexander G. Dickinson, Linda S. Grais, M.D., James C. Momtazee, Glen D. Stettin, M.D. and Matthew P. Young ceased to be a member of the board of directors of PRA, and any committee thereof, effective immediately following the Effective Time in connection with the Merger.