8490 Progress Dr.
Frederick, MD, 21701 United States
S&P 600 (June 30, 2014)
Life's a beach for the sand-sellers at U.S. Silica. The industrial mineral company provides silica and aplite for the glass, foundry, chemical, and construction industries; and fine ground silica and kaolin clay used to make paint, plastics, and ceramics. Its "frac sand" product -- currently its fastest-growing offering -- is used by natural gas and oil producers in hydraulic fracturing, a process to boost oil and gas production. The company supplies customers in the US and Canada. In addition to its main facility in West Virginia, U S. Silica also has a dozen plants in the East. A portfolio holding of private equity firm