X0306 4 2013-12-17 false 0001038357 PIONEER NATURAL RESOURCES CO PXD 0001265315 HANNES WILLIAM F 5205 N. O'CONNOR BLVD., SUITE 200 IRVING TX 75039 false true false false EVP, S. Wolfcamp Operations Common Stock 14 I 401(k) Common Stock 1516 I IRA Common Stock 2013-12-17 4 A false 2170 0 A 70273 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 9,330 PSE common units held by the reporting person were converted into the right to receive 2,170 shares of PXD common stock. 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 William Hannes 2013-12-18