Nicholas P. Bobrowski

Pinnacle Asset Integrity Services LLC provides asset management services, engineering consulting services and software. It engages in the implementation and maintenance of asset integrity management systems for the oil and gas, chemical, mining, pharmaceutical, wastewater and electric power industries. The firm offers software targeting inspection data management, risk based inspection, and vessel and stress analysis. The company was founded by Ryan Sitton in 2006 and is headquartered in Pasadena, TX.

EnerVest Ltd. (EnerVest) is a private equity firm founded in 1992 by John B. Walker and Jon Rex Jones. The firm is headquartered in Houston, Texas.

EV Energy Partners LP operates as a master limited partnership, which engages in the acquisition, development and production of oil and natural gas properties and all of the company operations are located in the United States. Its current properties are located in the Barnett Shale, the Appalachian Basin, the San Juan Basin, Michigan, Central Texas, the Mid-Continent areas in Oklahoma, Texas, Arkansas, Kansas and Louisiana, the Monroe Field in Northern Louisiana and the Permian Basin. The company was founded in April 2006 and is headquartered in Houston, TX.

Citigroup Global Markets, Inc. engages in the provision of brokerage, investment banking, and asset management services to individuals, businesses, and governments. The company was founded by Julie E. Silcock and is headquartered in New York, NY.

EV Management LLC develops and explores oil and gas. The private company is based in Houston, TX. The CEOs of the company are Mark A. Houser, Michael E. Mercer.