Exhibit 99.1

9 May, 2012

ICON plc
Purchase of Own Securities

Further to the announcement on 22 November, 2011 of a share repurchase programme, ICON plc (“the Company”) announces that on 8 May, 2012 it purchased for cancellation 9,048 Ordinary Shares, at an average price of $21.9588.

Following the cancellation of these shares, the Company will have 60,139,135 Ordinary Shares in issue.