U.S. Silica Announces Offering of 4,526,471 Shares by Selling Shareholder

FREDERICK, Md.--(BUSINESS WIRE)--Dec. 5, 2013-- U.S. Silica Holdings, Inc. (NYSE: SLCA) today announced the commencement of an underwritten public offering of 4,526,471 shares of U.S. Silica common stock by GGC USS Holdings, LLC, an affiliate of Golden Gate Capital. Upon completion of the offering, GGC USS Holdings, LLC will no longer own any U.S. Silica common stock. U.S. Silica will not receive any proceeds from the offering. The total number of U.S. Silica shares of common stock outstanding will not change as a result of the offering.

Morgan Stanley & Co. LLC is acting as the sole underwriter for the offering.

The offering of these shares of common stock is being made only by means of a prospectus supplement and related prospectus. You may obtain these documents for free by visiting EDGAR on the Securities and Exchange Commission (SEC) website at www.sec.gov. Alternatively, the prospectus and prospectus supplement may be obtained from Morgan Stanley & Co. LLC, 180 Varick Street, 2nd Floor, New York, New York 10014, Attention: Prospectus Department.

This press release shall not constitute an offer to sell or a solicitation of an offer to buy the common shares nor shall there be any sale of the common shares in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

About U.S. Silica

U.S. Silica Holdings, Inc., a member of the Russell 2000, is one of the largest domestic producers 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, MD.

Cautionary Information Regarding Forward-Looking Statements

Any statements in this press release that are not entirely historical in nature constitute forward-looking statements within the meaning of the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Readers are cautioned that these statements involve risks and uncertainties, are only predictions and may differ materially from actual future events or results. For important information regarding forward-looking statements, please read page 1 and 2 of the Company’s Annual Report on Form 10-K for the year ended Dec. 31, 2012.

Source: U.S. Silica Holdings, Inc.

U.S. Silica Holdings, Inc.
Michael Lawson
Director of Investor Relations and Corporate Communications
301-682-0304
lawsonm@ussilica.com