Mark E. Monroe

Louis Dreyfus Natural Gas Corp. sells natural gas and crude oil. It is subsidiary of Dominion resources, Inc. The company is headquartered in Oklahoma City, OK

Continental Resources, Inc. is an independent oil producer engaged in the exploration, development, and production of crude oil and natural gas. The firm's operations include horizontal drilling and protecting groundwater. The company was founded by Harold G. Hamm in 1967 and is headquartered in Oklahoma City, OK.

Seven Generations Energy Ltd. operates as an exploration company. The firm engages in the exploration, development and production of oil and gas resources. It focuses on its Kakwa River project in northwest Alberta. The company was founded on January 8, 2001 and is headquartered in Calgary, Canada.

Rose Rock Midstream LP owns, operates, develops and acquires a diversified portfolio of midstream energy assets. The firm is engaged in the business of crude oil gathering, transportation, storage, distribution and marketing in Colorado, Kansas, Louisiana, Montana, New Mexico, North Dakota, Oklahoma, Texas and Wyoming. It operates through four segments: Supply and logistics, Corporate and Other, Transportation and Facilities. The company was founded on August 5, 2011 and is headquartered in Tulsa, OK.

The National Petroleum Council operates as a council for national petroleum. The private company is based in Washington.

The Independent Petroleum Association of America manufactures oil and natural gas. The non-profit company is based in Washington. Barry Russell has been the CEO of the American company since 1980.

Oklahoma Independent Petroleum Association operates as an oil and natural gas association. The company was founded in 1955 and is headquartered in Oklahoma City, OK.