Dave Diulus

Avista Capital Holdings LP (Avista Capital Partners) is a private equity firm founded in 2005 by Steven Webster and Thompson Dean. The firm is headquartered in New York.

aPriori Capital Partners LP (aPriori Capital Partners) is a private equity firm founded in 1985 by Susan C. Schnabel and Colin Taylor. The firm is headquartered in Los Angeles, California.

Hi-Crush Proppants LLC engages in the provision of proppant and logistics solutions to the North American petroleum industry. The firm owns and has options to acquire sand excavating and processing locations located in Wisconsin. It also offers premium frac sand and logistics services to E&P companies, integrated service companies and pressure pumping companies, on contract and spot basis. Its services include transload, terminal and storage, and railcar storage and handling. The company was founded by Robert E. Rasmus and James M. Whipkey in October 2010 and is headquartered in Houston, TX.

Appalachian Midstream Partners LLC engages in natural gas gathering, transportation, treatment and processing, and pipelines conversions services. It develops and operates midstream assets that reduce upstream operational costs, provide consistent reliable access to market and meet customer expectations with timely and superior service. The firm focuses on providing competitive transportation and processing solutions for energy projects in various development stages. It offers gathering, transportation and processing services. The company was founded in 2010 and is headquartered in Wexford, PA.

Thompson Publishing Group, Inc. published subscription-based handbooks and newsletters. It provided regulatory compliance information for professionals in business and government through books, loose-leafs, newsletters, audio conferences, web subscription products, and email advisory alerts. The firm published publications in the areas of education, energy law, environmental compliance, finance and securities regulation, food and drug regulation, human resources, and broadband regulation. The company was founded in 1972 and was headquartered in Washington, DC.

ACP III Utica LLC acquires and develops oil and natural gas assets. The company is headquartered in Houston, TX.

Celtique Energie Holdings Ltd. operates as a holding company with interests in the exploration and production of oil and natural gas. It develops oil and natural gas discoveries and prospects in onshore basins through its subsidiary Celtique Energie Ltd. The company was founded in 2006 and is headquartered in London, the United Kingdom.

Hi-Crush GP LLC is a producer and supplier of premium Northern White frac sand, which is used as a preferred prop pant in unconventional oil and gas wells. The company was founded in 2010 and is headquartered in Houston, TX.

AEC Holdings LP (AEC Partners) is a private equity subsidiary of Avista Capital Holdings LP founded in 2017. The firm is headquartered in Houston, Texas.

Hansa Hydrocarbons Ltd. provides gas exploration services. It aims to grow a high-value business from exploiting the remaining potential for gas across the prolific Permian Basin that extends from the Southern North Sea through onshore Northern Europe. The company was founded on November 5, 2012 and is headquartered in London, the United Kingdom.

Evans Family Office Pty Ltd. provides investment services. The private company is based in Sydney, Australia. The Australian company was founded in 2015. The CEO is Gregory F. Evans.