Type	Name	Date
Indenture	Indenture, by and among Indigo Merger Sub, Inc., PRA Health Sciences, Inc., the guarantors party thereto and Citibank, N.A., London Branch as trustee, notes collateral agent, paying agent, transfer agent and registrar	07/01/2021
Credit agreement	Credit Agreement, by and among ICON Luxembourg, S.À R.L., ICON Clinical Investments, LLC, Indigo Merger Sub, Inc. (which, after giving effect to the Merger on the Closing Date, was succeeded by PRA Health Sciences, Inc.), ICON Public Limited Company, the other borrowers party thereto from time to time, the subsidiary guarantors party thereto from time to time, lenders party thereto, Citibank, N.A., as administrative agent, and Citibank, N.A., London Branch, as collateral agent	07/01/2021
Underwriting agreement	UNDERWRITING AGREEMENT	09/06/2019
Credit agreement	Credit Agreement, by and among Pharmaceutical Research Associates, Inc., PRA Health Sciences, Inc., Wells Fargo Bank, National Association, as administrative agent and other agents and lenders party thereto	12/07/2016