“Brian has been instrumental to US Silica’s recent growth and transition from a private to a public company by serving as Chief Administrative Officer, as a member of our board, and as our previous Chief Executive Officer. We thank Brian for his enormous contributions to the company and look forward to him continuing as a member of our board of directors.”The Company will file a Form 8-K with the Securities and Exchange Commission later today regarding these management changes. 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 200 products to customers across these end markets. U.S. Silica Holdings, Inc. is headquartered in Frederick, Maryland. For more information about US Silica visit www.ussilica.com.