DUBLIN--(BUSINESS WIRE)--ICON plc, (NASDAQ: ICLR), today announced the successful completion and settlement of the private placement by its subsidiary ICON Investment Five Unlimited Company (the “Issuer”) of $350,000,000 aggregate principal amount of its 3.64% Senior Notes due 2020 (the “Notes”). The Notes will mature on December 15, 2020. Interest is payable semi-annually on the Notes on each June 15 and December 15, commencing June 15, 2016. The Notes are guaranteed by ICON plc.