U.S. Silica Announces Pricing of Upsized Public Offering of Common Stock

FREDERICK, Md., March 16, 2016 /PRNewswire/ -- U.S. Silica Holdings, Inc. (NYSE: SLCA) announced today that it has priced an underwritten public offering of 8,695,700 shares of U.S. Silica common stock, upsized from the previously announced 8,000,000 shares, for total estimated gross proceeds of $173,914,000. The underwriters have been granted a 30-day option to purchase up to an additional 1,304,300 shares of common stock.

U.S. Silica intends to use the net proceeds of the offering for general corporate purposes including the potential acquisition of complementary businesses or assets. The offering is expected to close on March 22, 2016, subject to customary closing conditions.

Barclays Capital Inc. and Morgan Stanley & Co. LLC acted as joint book-running managers for the offering. This offering is being made by means of a prospectus supplement and accompanying base prospectus, copies of which may be obtained 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 by sending a request to: Barclays Capital Inc., c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, New York 11717, Telephone 888-603-5847, Email: barclaysprospectus@broadridge.com or Morgan Stanley & Co. LLC, Attention: Prospectus Department, 180 Varick Street, 2nd floor, New York, NY 10014.

This offering is being made pursuant to an effective shelf registration statement filed with the Securities and Exchange Commission. This press release shall not constitute an offer to sell or the solicitation of an offer to buy the Company's common stock or any other securities, and there shall not be any offer, solicitation or sale of securities mentioned in this press release 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 such any state or jurisdiction.

About U.S. Silica

U.S. Silica Holdings, Inc., a member of the Russell 2000, is a leading producer of commercial silica used in the oil and gas industry, and in a wide range of industrial applications. Over its 116-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 260 products to customers across our end markets. The Company currently operates nine industrial sand production plants and eight oil and gas sand production plants. The Company is headquartered in Frederick, Maryland and also has offices located in Chicago, Illinois and Houston, Texas.

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, 2015.

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

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SOURCE U.S. Silica Holdings, Inc.