X0306 4 2012-07-25 0 0000085408 ROWAN COMPANIES PLC RDC 0001183342 CROYLE ROBERT G 2800 POST OAK BLVD SUITE 5450 HOUSTON TX 77056 1 0 0 0 Restricted Share Units 2012-07-25 4 A 0 5913 0.00 A Class A Ordinary Shares 5913 23928 D Each restricted share unit represents a contingent right to receive one Class A Ordinary Share of Rowan Companies plc. The units vest on the earlier of July 25, 2013 or the date of the next annual meeting of shareholders. Vested shares (including any dividends) will be delivered to the reporting person after the final termination date of the reporting person's service on the Board of Directors. At the election of the Compensation Committee, such payout may be made in cash or shares. /s/ Melanie M. Trent, attorney-in-fact 2012-07-27