X0303 4 2010-06-07 0000314808 Ensco plc ESV 0001436960 Burns John Mark 6 CHESTERFIELD GARDENS 3RD FLOOR LONDON X0 W1J 5BQ UNITED KINGDOM 0 1 0 0 Senior Vice President American Depositary Shares 2010-06-01 4 F 0 129 36.18 D 83466 D American Depositary Shares 2010-06-07 4 F 0 4327 35.10 D 79139 D On 06/02/2010 the price of $34.45 per share was reported as related to American Depositary Shares surrendered for tax purposes as related to the vesting of restricted shares. The correct price per share is $36.18. Amount is representative of a second surrender of American Depositary Shares for tax purposes as related to the vesting of restricted shares which took place on 06/01/2010 and 06/02/2010. /s/ Cary A. Moomjian, Jr., by Power of Attorney 2010-06-09