Mark Allen

ENSCO International, Inc. engages in the provision of contract drilling and marine transport services. The company was founded in 1987 and is headquartered in Houston, TX.

Denbury Inc. is an independent energy company, which engages in the operation and production of oil and natural gas reserves. The firm holds interests in the Gulf Coast and Rocky Mountain regions. It aims to develop significant stranded reserves of American oil from depleted reservoirs through carbon dioxide enhanced oil recovery (CO2 EOR). The company was founded by Gareth G. Roberts in 1951 and is headquartered in Plano, TX.

Part of Exxon Mobil Corp., Denbury Onshore LLC is a private company that explores oil and gas properties. The company is based in Plano, TX and was founded in 2003.

Encore Energy Partners LP acquires and develops existing oil and natural gas properties. The firm operates through one business segment, the oil and natural gas exploration and production industry in the United States. The company was founded on February 13, 2007 and is headquartered in Houston, TX.

Part of Exxon Mobil Corp., Encore Energy Partners GP LLC is a private company based in Dallas, TX. Scott W. Smith has been the CEO of the company since 2010.

Genesis Energy LLC distributes natural gas. The company was founded on May 28, 2002 and is headquartered in Houston, TX.