X0303 4 2010-02-19 false 0000064279 MCMORAN EXPLORATION CO /DE/ MMR 0001160588 DAY ROBERT 865 SOUTH FIGUEROA ST., STE. 1800 LOS ANGELES CA 90017 true false false false Common Stock 961310 D Common Stock 2010-02-19 4 P false 30750 16.4162 A 77845 I Held through spouse Common Stock 2010-02-22 4 P false 36255 16.2164 A 114100 I Held through spouse Includes 4,375 Common Stock Restricted Stock Units. The price reported represents the weighted average price of the shares purchased. Shares were purchased at varying prices in the range of $16.33 - $16.53. The Reporting Person hereby undertakes, upon request of the Staff of the U.S. Securities and Exchange Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price. The price reported represents the weighted average price of the shares purchased. Shares were purchased at varying prices in the range of $15.95 - $16.43. The Reporting Person hereby undertakes, upon request of the Staff of the U.S. Securities and Exchange Commission, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price. Since the date of the last Form 4, Mr. Day's reported holdings have been adjusted as follows to correct an error: his direct holdings have been increased by one share, and his indirect holdings through his spouse have been reduced by one share. Kelly C. Simoneaux on behalf of Robert A. Day pursuant to a power of attorney 2010-02-23