Cobalt International Energy, Inc. (“Cobalt”) (NYSE: CIE) today, in responding to two articles published by the Financial Times on April 15, 2012, titled “Angola officials held hidden oil stakes” and “Spotlight falls on Cobalt’s Angola partner,” strongly refuted any allegations of wrong doing and once again stood behind its principles of full compliance with all laws in all jurisdictions in which it operates. Prior to publication of these articles, Cobalt went on the record asking for any documentation that the Financial Times could offer which was at odds with its position. The Financial Times declined Cobalt’s repeated requests for supporting documentation. In fact, in the course of these communications, Cobalt informed the Financial Times of certain egregious, demonstrably false allegations that it provided to Cobalt. Cobalt began its investigation into its Angola business relationships in 2007. Cobalt has based its decisions and actions on the results of these extensive investigations and will continue to maintain rigorous due diligence in all of its worldwide activities. Cobalt remains confident that it has not violated any US or Angolan Law and will vigorously defend its reputation and legal rights in this matter. About Cobalt Cobalt is an independent oil exploration and production company focusing on the deepwater U.S. Gulf of Mexico and offshore Angola and Gabon. Cobalt was formed in 2005 and is headquartered in Houston, Texas. Forward-Looking Statements This press release includes “forward-looking statements” within the meaning of the safe harbor provisions of the Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934 — that is, statements related to future, not past, events. Forward-looking statements are based on current expectations and include any statement that does not directly relate to a current or historical fact. In this context, forward-looking statements often address Cobalt’s expected future business and financial performance, and often contain words such as “anticipate,” “believe,” “intend,” “expect,” “plan,” “will” or other similar words. These forward-looking statements involve certain risks and uncertainties that ultimately may not prove to be accurate. Actual results and future events could differ materially from those anticipated in such statements. For further discussion of risks and uncertainties, individuals should refer to Cobalt’s SEC filings. Cobalt undertakes no obligation and does not intend to update these forward-looking statements to reflect events or circumstances occurring after this press release, other than as required by law. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this press release. All forward-looking statements are qualified in their entirety by this cautionary statement.