Ensco plc Announces Cash Dividend

Ensco plc (NYSE: ESV) announced today that its Board of Directors has declared a regular quarterly cash dividend of US$0.35 per Class A ordinary share payable on 23 September 2011 to holders of Ensco’s American Depositary Shares (ADSs) as of the 12 September 2011 record date.

Ensco uses its website to disclose material and non-material information to investors, customers, employees and others interested in Ensco. To receive regular updates on Ensco news or SEC filings, please sign-up for Email Alerts on the Company’s website.

Ensco plc (NYSE: ESV) brings energy to the world as a global provider of offshore drilling services to the petroleum industry. We have the world’s second largest offshore drilling fleet comprised of dynamically-positioned drillships and semisubmersibles, moored semisubmersibles and premium jackups. Ensco is ranked #1 for overall customer satisfaction in the leading independent survey conducted by EnergyPoint Research with #1 ratings in 14 of 16 separate categories. To learn more about Ensco, please visit our website at www.enscoplc.com. Ensco plc is an English limited company (England No. 7023598) with its registered office and corporate headquarters located at 6 Chesterfield Gardens, London W1J 5BQ.