Michael R. McLear

Core Minerals Operating Co., Inc. provides oil and gas exploration and production services. Its project management including land leasing, surface use, drilling, marketing, gathering, and transportation and Participation in oil and gas exploration and development projects with a focus on horizontal well development programs. The company was founded in 2006 and is headquartered in Evansville, IN.

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.

Team Energy LLC is an American company that operates, develops, and explores oil and gas properties.

Marathon Oil Co. explores, transports and markets crude oil, and natural gas. It focuses on oil and gas exploration and production in Angola, Canada, Equatorial Guinea, Norway, the UK and the US. The company was founded by Henry M. Ernst in 1886 and is headquartered in Houston, TX

Illinois Oil & Gas Association provides an agency through which oil and gas producers, landowners, royalty owners, and others who may be directly or indirectly affected by or interested in oil and gas development and production in Illinois, may protect, preserve and advance their common interests. The company was founded in 1944 and is headquartered in Mount Vernon, IL.