Pioneer Natural Resources Company (Pioneer) is an independent oil and gas exploration and production company with operations in the United States and South Africa. Pioneer is a holding company whose assets consist of direct and indirect ownership interests in, and whose business is conducted substantially through, its subsidiaries. The Company sells homogenous oil, natural gas liquid (NGL) and gas units. The Company provides administrative, financial, legal and management support to United States and South Africa subsidiaries that explore for, develop and produce proved reserves. The Company�s continuing operations are principally located in the United States in the states of Texas, Kansas, Colorado and Alaska. During February 2011, the Company completed the sale of Pioneer Natural Resources Tunisia Ltd. and Pioneer Natural Resources Anaguid Ltd. In April 2012, it acquired Carmeuse Industrial Sands (CIS).