U.S. Silica Holdings, Inc. is a performance materials company and is a member of the Russell 2000. The Company is a leading producer of commercial silica used in the oil and gas industry, and in a wide range of industrial applications. Over its 121-year history, U.S. Silica has developed core competencies in mining, processing, logistics and materials science that enable it to produce and cost-effectively deliver over 400 diversified products to customers across its end markets. U.S. Silica's wholly-owned subsidiaries include EP Minerals and SandBox Logistics™.The Company currently operates 23 mines and production facilities. The Company is headquartered in Katy, Texas and has offices in Reno, Nevada and Chicago, Illinois.