James G. Ivey

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.

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.

Cobalt’s business model is uniquely designed to create maximum value from the asset by doing more with less while competitively accessing, discovering and producing deepwater hydrocarbon resources on a scale similar to the super majors. It starts with its small core team – flexible, decisive and fast moving using Cobalt’s proprietary, state-of-the-art data and proven, leading-edge technology. Non-core activities are sourced to outside partners and specialty providers, leveraging relationships it has forged over many years in the industry to reduce costs and compress delivery time. Utilizing industry best practices, standardized designs and strong project management throughout, The company is able to move quickly through the E&P supply chain, maximizing value for its investors and its partners.

MACH Gen LLC owns and operates natural-gas-fired electric-generating facilities in Arizona, Athens and Charlton. The firm also operates gas-fired generation plants. The company was founded on May 29, 2003 and is headquartered in Athens, NY.

National Energy & Gas Transmission, Inc. distributes electricity and gas. The company was founded on September 12, 2000 and is headquartered in Bethesda, MD.

Part of Apollo Global Management, Inc., Tenneco Gas is a company that deals with farm machinery and equipment. The company is based in Houston, TX.