Pioneer Natural Resources Company · Irving, TX United States ·(NYSE: PXD)

Oil and gas explorer Pioneer Natural Resources' frontier is not in the Western prairies, but below them, and below the Rocky Mountains, the Midcontinent, West Texas, South Texas, and elsewhere. The large independent exploration and production company holds proved reserves of 959.6 million barrels of oil equivalent. The vast majority of the exploration and production company's reserves are found within the US (including in Alaska), but Pioneer also explores for and produces oil and gas in South Africa, and Tunisia, and has additional assets in Equatorial Guinea and Nigeria. To read the full description, subscribe now.