Calyx Energy III, LLC, formerly Calyx Energy, LLC, produces oil and gas from wells in Oklahoma.
Kaiser-Francis Oil Company engages in oil and gas exploration and production. Its parent company is GBK Corporation.
Merit Energy Company, LLC is a large, private, US-based oil and gas company with operations in twelve states with a daily production of 65,000 barrels of oil equivalent.
Hilcorp San Juan, LP is an energy exploration and production company
Hess Bakken Investments II, LLC is a major oil producer in North Dakota. Its parent company is Hess Corporation.
Texlark Exploration Co., Inc. discovers and develops onshore oil and natural gas resources. It has operations in Texas.
Amplify Energy Corporation is an oil company with oil and gas wells in Texas and the western US.
Superior Refining Company, LLC operates the Superior Refinery in Superior, Wisconsin, which suffered an explosion and fire on April 26, 2018.
Tug Hill Operating, LLC engages in exploration and production of oil and natural gas in the continental US.
Marathon Oil Corporation is an oil and natural gas exploration and production company headquartered in Houston, Texas.