U.S. Silica Holdings, Inc. (NYSE: SLCA) today announced Bryan A. Shinn, President and Chief Executive Officer will participate in a panel discussion and meet with investors at the Thirteenth Annual Simmons Energy Conference in Las Vegas, NV on Thursday, February 28, 2013 and Friday, March 1, 2013. The slide presentation to be used by management can be found on U.S. Silica’s website at www.ussilica.com in the Investor Resources section. About U.S. Silica U.S. Silica Holdings, Inc., a Delaware corporation, is the second largest domestic producer of commercial silica, a specialized mineral that is a critical input into the oil and gas proppants end market. The company also processes ground and unground silica sand for a variety of industrial and specialty products end markets such as glass, fiberglass, foundry molds, municipal filtration and recreational uses. During its 100-plus year history, U.S. Silica Holdings, Inc. has developed core competencies in mining, processing, logistics and materials science that enable it to produce and cost-effectively deliver over 250 products to customers across these end markets. U.S. Silica Holdings, Inc. is headquartered in Frederick, Maryland.