Mark C. Skolos

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.

Hi-Crush, Inc. engages in the production of monocrystalline sand. It owns, operates, and develops sand reserves and related excavation as well as processing facilities. The firm supplies frac sand and logistics services. The company was founded on May 8, 2012 and is headquartered in Houston, TX.

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.

National Industrial Sand Association operates as a non-profit organization that offers industrial sand products. It offers ceramics and refractories; chemical production; construction; filtration and water production; glass production; metal casting; metal production; oil and gas recovery; paint and coatings; and recreational products. The company was founded in November 1935 and is headquartered in Washington, DC.