X0303 4 2010-06-01 0000314808 Ensco plc ESV 0001184169 ROWSEY PAUL E III 500 N. AKARD STREET SUITE 4300 DALLAS TX 75201-3331 1 0 0 0 American Depositary Shares 2010-06-01 4 F 0 617 34.45 D 25114 D American Depositary Shares 2010-06-01 4 A 0 6675 34.45 A 31789 D Amount is representative of American Depositary Shares surrendered for tax purposes upon vesting of restricted shares on 06/01/2010, as related to multiple equity grants. Amount is representative of a Non-Employee Director Restricted American Depositary Shares Grant. The Non-Employee Director Restricted American Depositary Shares Grant vest at a rate of 20% per annum on the anniversary date of the grant and is fully vested in five (5) years. /s/ Robert O. Isaac, by Power of Attorney 2010-06-02