Donald R. Laughlin

Society of Petroleum Engineers, Inc. provides petroleum engineering services. The non-profit company is based in Allen, TX and has subsidiaries in United States, India and Canada.

Atlas America, Inc. engages in the development, production and transportation of natural gas and oil in western New York, eastern Ohio, western Pennsylvania and Tennessee. The company, through its wholly owned subsidiary transports natural gas from wells to interstate pipelines and end users as well as operates a natural gas processing facility. The company has reserves of approximately 171.6 billion cubic feet of natural gas equivalents. The company was incorporated in 2000 and is headquartered in Moon Township, PA.

Columbia Gas Transmission Corp. operates natural gas pipeline network serving hundreds of communities. It also owns and operates underground natural gas storage systems. The company is headquartered in Charleston, VA.

Columbia Gas System, Inc. distributes and sells natural gas. The private company is based in Wilmington, DE and has subsidiaries in the United States.

Atlas Resources Public 18 2008-A LP engages in the drilling of oil and gas wells. It operates wells located in Pennsylvania, Tennessee, Michigan, Indiana, West Virginia and Ohio. The company was founded on April 8, 2008 and is headquartered in Pittsburgh, PA.

Atlas Resources LLC engages in the development and production of natural oil and gas. The company was founded in October 2011 and is headquartered in Pittsburgh, PA.