* Comments: 
WHX: Whiting USA Trust I is a REIT. The trust was founded in 2007 and is based in Austin, Texas. Whiting USA Trust I operates as a subsidiary of Whiting Petroleum Corp. 

ECT: ECA Marcellus Trust I holds royalty interests in producing and development horizontal natural gas wells for Energy Corporation of America (ECA). It owns royalty interests in 14 producing horizontal natural gas wells producing from the Marcellus Shale formation, located in Greene County, Pennsylvania; and royalty interests in 52 horizontal natural gas development wells to be drilled to the Marcellus Shale formation comprising approximately 9,300 acres held by ECA in Greene County, Pennsylvania. The royalty interest in the producing wells allows the company to receive 90% of the proceeds from the sale of production of natural gas attributable to ECA's interest in the producing wells. The royalty interest in the development wells allows the company to receive 50% of the proceeds from the sale of production of natural gas attributable to ECA's interest in development Wells. ECA Marcellus Trust I was founded in 2010 and is based in Austin, Texas.

BBEP: BreitBurn Energy Partners L.P. engages in the acquisition, exploitation, and development of oil and gas properties in the United States. The company's assets primarily consist of producing and non-producing crude oil and natural gas reserves located primarily in the Antrim Shale and other formations in northern Michigan; the Los Angeles Basin in California; the Wind River and Big Horn Basins in central Wyoming; the Sunniland Trend in Florida; and the New Albany Shale in Indiana and Kentucky. As of December 31, 2010, its proved natural gas and crude oil reserves consisted of 118.9 million barrels of oil equivalent. BreitBurn GP, LLC serves as the general partner to the company. BreitBurn Energy Partners L.P. was incorporated in 2006 and is based in Los Angeles, California..