X0306 4 2013-12-17 false 0001038357 PIONEER NATURAL RESOURCES CO PXD 0001121919 DEALY RICHARD P 5205 N. O'CONNOR BLVD., SUITE 200 IRVING TX 75039 false true false false EVP & CFO Common Stock 310 I 401(k) Common Stock 2013-12-17 4 A false 10601 0 A 189771 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 45,602 PSE common units held by the reporting person were converted into the right to receive 10,601 shares of PXD common stock. The shares acquired include 5,062 shares underlying restricted stock units of the Issuer acquired in connection with the conversion of 21,780 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 Richard P. Dealy 2013-12-18