X0306 4 2013-12-17 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 2013-12-17 4 A false 3340 0 A 55728 D Consists of shares beneficially owned as a result of reporting ownership of units in the Pioneer Natural Resources USA, Inc. 401(k) On December 17, 2013, Pioneer Southwest Energy Partners L.P. (PSE) merged with a subsidiary of the Issuer and each publicly held common unit of PSE was converted into the right to receive 0.2325 of a share of Issuer common stock. Pursuant to the merger, the 14,368 PSE common units held by the reporting person were converted into the right to receive 3,340 shares of PXD common stock. The shares acquired include 2,807 shares underlying restricted stock units of the Issuer acquired in connection with the conversion of 12,076 phantom units of PSE pursuant to the assumption by the Issuer of the PSE long term incentive plan. On December 17, 2013, the closing price of PSE common units was $42.50, and the closing price of shares of common stock of the Issuer was $182.43. Mark H. Kleinman, Attorney-in-Fact For Danny L. Kellum 2013-12-18