PDC Energy, Inc., an independent exploration and production company, acquires, explores for, develops, and produces crude oil, natural gas, and natural gas liquids in the United States. The company operates in two segments: Oil and Gas Exploration and Production, and Gas Marketing. The Oil and Gas Exploration and Production segment produces and sells natural gas to midstream service providers, marketers, and utilities; crude oil; and natural gas liquids. The Gas Marketing segment purchases, aggregates, and resells natural gas; and purchases natural gas produced by third party producers for resale. This segment markets natural gas to third-party marketers and natural gas utilities, as well as to industrial and commercial customers. As of December 31, 2014, it had approximately 250 million barrels of crude oil equivalent of proved reserves; and owned an interest in approximately 2,900 gross producing wells. The company was formerly known as Petroleum Development Corporation and changed its name to PDC Energy, Inc. in June 2012. PDC Energy, Inc. was founded in 1969 and is headquartered in Denver, Colorado.