William Nicoletti

Southwest Developmental Drilling Fund 91-A LP produces and markets crude oil and natural gas. The firm is the managing general partner of Southwest Royalties, Inc. It is headquartered in Midland, TX.

MarkWest Hydrocarbon LLC provides natural gas processing services. It also provides transportation, fractionation, and storage of natural gas liquids and transportation of crude oil. The company was founded by John M. Fox in April 1998 and is headquartered in Denver, CO.

Surge Global Energy, Inc. engaged in the acquisition of crude oil, natural gas and pipeline properties. It seeks investment in developing oil and natural gas projects as well as companies engaged in alternative fuel technologies. The company was founded on November 25, 1997 and was headquartered in Miami, FL.

Southwest Partners III LP provides investment services. It primarily invests in oil field service companies. The company was founded on March 11, 1997 and is located in Midland, TX.

Gradison McDonald Investments, Inc. (GMI) is the Cincinnati, Ohio-based buyside group of Keybank NA (NYSE: KEY).

MarkWest Energy Partners LP engages in the business of gathering, processing and transportation of natural gas; the transportation, fractionation, storage and marketing of natural gas liquids; and the gathering and transportation of crude oil. It operates through four segments: Marcellus, Utica, Northeast and Southwest. The Southwest segment includes the operations of processing facilities in Corpus Christi, Texas. The Northeast segment assets include the Kenova, Boldman, Cobb, Kermit and the Langley natural gas processing complexes, NGL pipeline and Siloam NGL fractionation facility. The Marcellus segment includes gathering, processing and fractionation infrastructure in the liquids-rich area of the Marcellus Shale The Utica segment provides fractionation services. The company was founded in January 2002 and is headquartered in Denver, CO.

Part of Marathon Petroleum Corp., MarkWest Energy GP LLC is a private company that provides oil and gas field services not elsewhere classified. The company is based in Englewood, CO. The company was founded by John C. Mollenkopf.