X0306 4 2017-05-25 0 0000085408 ROWAN COMPANIES PLC RDC 0001282307 PILENKO THIERRY 2800 POST OAK BOULEVARD SUITE 5450 HOUSTON TX 77056 1 0 0 0 Restricted Share Units 2017-05-25 4 A 0 15111 0.00 A Class A Ordinary Shares 15111 15111 D Each deferred restricted share unit represents a contingent right to receive one Class A Ordinary Share of Rowan Companies plc, or at the discretion of the Compensation Committee, such settlement may be made in cash, shares or a combination. The restricted share units vest on the earlier of May 25, 2018 or the date of the next annual meeting of shareholders but are not settled until departure from the Board. Includes 15,111 deferred restricted shares units which settle upon departure from the Board, in cash, shares or a combination, at the discretion of the Compensation Committee. /s/ Mark F. Mai, attorney-in-fact 2017-05-30