Pioneer Natural Resources Co.

Pioneer Natural Resources Company is an independent oil and gas exploration and production company. The Company explores for, develops and produces oil, natural gas liquids (NGLs) and gas in the Midland Basin in West Texas. The Company conducts exploitation and exploration activities in the Spraberry/Wolfcamp oil field located in the Midland Basin in West Texas.

The Company holds approximately 960 thousand gross acres, of which 939 thousand gross acres are located in the Spraberry/Wolfcamp field in the Midland Basin of West Texas. The Company has a joint venture with Sinochem Petroleum USA LLC, which encompasses approximately 235 thousand gross acres. The oil produced from the Spraberry/Wolfcamp field in the Midland Basin is West Texas Intermediate Sweet, and the gas produced is casinghead gas with an average energy content of 1,400 British thermal unit (Btu). The oil and gas are produced primarily from six formations, including Spraberry, Jo Mill, Dean, Wolfcamp, Strawn and Atoka. .