Ranger Oil 

Penn Virginia Corporation, an independent oil and gas company, engages in the onshore exploration, development, and production of crude oil, natural gas liquids, and natural gas in the United States. It primarily operates wells in the Eagle Ford Shale field in South Texas. As of December 31, 2019, it had total proved reserves of approximately 133 million barrels of oil equivalent; and 510 gross productive wells, as well as owned approximately 100,200 gross acres of leasehold and royalty interests. Penn Virginia Corporation was founded in 1882 and is headquartered in Houston, Texas.