Mark H. Elliott

Rex Energy Corp. is an energy company, which engages in the acquisition, production, exploration, and development of oil, natural gas, and natural gas liquids. The company was founded by Thomas C. Stabley and Benjamin W. Hurlburt in 2004 and is headquartered in State College, PA.

Cimarex Energy Co. is an independent oil and gas exploration and production company. Its activities include drilling, completing and operating wells. It operates through the following areas: Permian Basin, Mid-Continent, and Others in Oklahoma, Texas and New Mexico. The company was founded by F. H. Merelli in February 2002 and is headquartered in Denver, CO.

Latigo Petroleum, Inc. explores and develops oil and gas. It conducts exploration and development drilling programs and makes strategic acquisitions in its targeted area of the Mid-Continent Region of the United States. The firm's targeted area includes the Permian, Anadarko and Arkoma basins located in Texas, New Mexico, Oklahoma and Arkansas. The company was founded in 1996 by Randy A. Foutch and is headquartered in Tulsa, OK.

Southwest Royalties, Inc. acquires, develops, and produces oil and gas properties. The firm produces and markets crude oil and natural gas from the properties owned. The company was founded in 1983 and is located in Midland, TX.

Laredo Petroleum, Inc. is an exploration and production company with headquarters in Tulsa, Oklahoma. Laredo's strategy is to make strategic acquisitions and participate in drilling joint ventures having upside potential in the targeted area of the Mid-Continent and Permian Basin Regions of the United States. The company was founded in May 2007 and is headquartered in Tulsa, OK