Hart Energy, LLLP

Founded in 1998, Motiva Enterprises is a joint venture of Saudi Refining and Shell Oil Company that refines, distributes and markets oil products. It offers truckload and bulk oil products and services for businesses and wholesalers. The company also provides storage, scheduling, accounting and delivery services for light and heavy oil hydrocarbons. Motiva Enterprises operates more than 7,700 shell-branded gasoline stations, refineries and storage terminals. It serves clients in the eastern and southern United States. In addition, the company maintains Convent Refinery and Norco Refining Company. Motiva Enterprises serves clients in the retail, distribution and commercial industries. It is owned by Saudi Refining and Shell Oil Company.

Black Stone Minerals Company, a privately-owned Delaware limited partnership located in Houston, Texas, and is one of the largest fee mineral and royalty owners in the United States. Along with its private equity funds, Black Stone s ownership includes in excess of 15,000 wells and approximately 13.2 million gross acres located in more than 35 states. Since 1999, the company has closed nine large acquisitions of mineral properties with producing royalty totaling approximately $380 million, from large corporations to family-held entities.

Southwestern Energy Company, founded in 1929, explores, produces and distributes natural gas and oil throughout the United States, including Arkansas, Texas, Louisiana, New Mexico, and Oklahoma. The company conducts its exploration and production activities through its wholly owned subsidiaries, Southwestern Energy Production Company and SEECO. It has oil drilling operations in the Arkoma Basin and East Texas, and exploration facilities in New Mexico. The company s subsidiary, Arkansas Western Gas Company, distributes and transmits natural gas to more than 1 million residential, commercial and industrial customers in northern Arkansas. It also provides natural gas storage and transportation facilities to third-party clients. Southwestern Energy Company is headquartered in Houston.