X0306 4/A 2012-08-07 2012-08-09 false 0001038357 PIONEER NATURAL RESOURCES CO PXD 0001121922 KELLUM DANNY L 5205 N. O'CONNOR BLVD., SUITE 200 IRVING TX 75039 false true false false EVP, Permian Operations Common Stock 265 I 401(k) Common Stock 71 I by Spouse Common Stock 2012-08-07 4 M false 14131 15.62 A 88909 D Common Stock 2012-08-07 4 S false 14131 98.8284 D 74778 D Common Stock 2012-08-07 4 S false 15000 99.1526 D 59778 D Non-Qualified Stock Option (right to buy) 15.62 2012-08-07 4 M false 14131 0 D 2012-02-18 2019-02-18 Common Stock 14131 0 D Consists of shares beneficially owned as a result of reporting person's ownership of units in the Pioneer Natural Resources USA, Inc. 401(k) Plan. The reporting person acquired beneficial ownership of these shares upon his marriage to the owner of the shares on June 26, 2012. These shares were omitted from the reporting person's original Form 4 filed August 9, 2012. This transaction was executed in multiple trades at prices ranging from $98.7723 to $98.97. The price reported above reflects the weighted average sale price. The reporting person will provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. This transaction was executed in multiple trades at prices ranging from $99.0719 to $99.29. The price reported above reflects the weighted average sale price. The reporting person will provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. Mark H. Kleinman, Attorney-in-Fact For Danny L. Kellum 2012-10-09