Exhibit 99.1

29 June, 2012

ICON plcPurchase of Own Securities

Further to the announcement on 22 November, 2011 of a share repurchase programme, ICON plc (“the Company”) announces that on 28 June, 2012 it purchased for cancellation 20,110 Ordinary Shares, at an average price of $21.8025.

Following the cancellation of these shares, the Company will have 59,690,088 Ordinary Shares in issue.