Gerald A. Tywoniuk

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.

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.

Pacific Energy Resources Ltd. explores and develops oil and gas properties. It owns and operates oil fields in Southern California in the Los Angeles Basin. The company was founded on November 20, 1980 and is headquartered in Long Beach, CA.

Oxford Resource Partners LP produces high value steam coal and surface mined coal in Ohio. The company markets its coal primarily to large electric utilities with coal-fired, base-load scrubbed power plants under long-term coal sales contracts. Oxford Resource Partners was founded in August 2007 and is headquartered in Columbus, OH.

Part of High Point Infrastructure Partners LLC, Third Coast Midstream Holdings LLC is a private company that provides investment services. The company is based in Denver, CO. Third Coast Midstream Holdings was acquired by High Point Infrastructure Partners LLC on April 15, 2013. Louis J. Dorey has been the CEO of the company since 2019.

Third Coast Midstream LLC engages in transportation of natural gas. It offers, petroleum, oil and gas transportation services. It provides midstream infrastructure that links producers of natural gas, crude oil, NGLs, and condensate to end-use markets. The company was founded on August 20, 2009 and is headquartered in Houston, TX.