News Release

U.S. Silica Holdings, Inc. Announces Fourth Quarter and Full Year 2016 Results

Frederick, Md., Feb. 22, 2017 – U.S. Silica Holdings, Inc. (NYSE: SLCA) today announced a net loss of $6.9 million or $(0.09) per basic and diluted share for the fourth quarter ended Dec. 31, 2016 compared with a net loss of $15.3 million or $(0.29) per basic and diluted share for the fourth quarter ended Dec. 31, 2015. The fourth quarter results were negatively impacted by $2.6 million of business development-related expenses, including acquisition-related costs for Sandbox and NBR Sands. Excluding these expenses, net of $1.0 million tax effect, EPS was $(0.07) per basic share for the quarter.

“Despite the many challenges, we made substantial progress in 2016 to make our Company leaner, stronger, more flexible and ultimately easier for customers to do business with, all of which we believe will enable us to further extend our industry-leading positions in both our Oil and Gas and Industrial and Specialty Products segments,’’ said Bryan Shinn, president and chief executive officer. “Looking ahead at 2017, we see strong demand for both sand proppant and last mile logistics in our Oil and Gas business and believe we have the right strategy and are well positioned to capitalize on these favorable market trends. For our Industrial segment, demand in most of our end use markets is anticipated to stay strong and we expect to continue to roll out new, higher margin products to drive bottom line growth,’’ he added.

Full Year 2016 Highlights

Total Company

Fourth Quarter 2016 Highlights

Total Company

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Oil and Gas

Industrial and Specialty Products

Capital Update

As of Dec. 31, 2016, the Company had $711.2 million in cash and cash equivalents and $46.0 million available under its credit facilities. Total debt at Dec. 31, 2016 was $513.2 million compared with $491.7 million at Dec. 31, 2015. Capital expenditures in the fourth quarter totaled $13.7 million and were associated largely with the Company’s investments in various maintenance, expansion and cost improvement projects.

Outlook and Guidance

Due to the current lack of visibility in its Oil and Gas business, the Company will continue to refrain from providing guidance for Adjusted EBITDA until such time as we can gain more clarity around our customers’ business activity levels and the associated demand for our products. Based on current market conditions, the Company anticipates that its capital expenditures for 2017 will be in the range of $125 million to $150 million.

Conference Call

U.S. Silica will host a conference call for investors tomorrow, Feb. 23, 2017 at 9:00 a.m. Eastern Time to discuss these results. Hosting the call will be Bryan Shinn, president and chief executive officer and Don Merril, executive vice president and chief financial officer. Investors are invited to listen to a live webcast of the conference call by visiting the “Investor Resources” section of the Company’s website at www.ussilica.com. The webcast will be archived for one year. The call can also be accessed live over the telephone by dialing (877) 869-3847 or for international callers, (201) 689-8261. A replay will be available shortly after the call and can be accessed by dialing (877) 660-6853 or for international callers, (201) 612-7415. The conference ID for the replay is 13654614. The replay of the call will be available through March 23, 2017.

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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 117-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 240 products to over 1,200 customers across our end markets. The Company currently operates nine industrial sand production plants, nine oil and gas sand production plants and seven Sandbox distribution centers. The Company is headquartered in Frederick, Maryland and also has offices located in Chicago, Illinois, and Houston, Texas.

Forward-looking Statements

Certain statements in this press release are “forward-looking statements” made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995 and speak only as of this date. Forward-looking statements made include any statement that does not directly relate to any historical or current fact and may include, but are not limited to, statements regarding U.S. Silica’s growth opportunities, strategy, future financial results, forecasts, projections, plans and capital expenditures, and the commercial silica industry. Forward-looking statements are based on our current expectations and assumptions, which may not prove to be accurate. These statements are not guarantees and are subject to risks, uncertainties and changes in circumstances that are difficult to predict. Many factors could cause actual results to differ materially and adversely from these forward-looking statements. Among these factors are: (1) fluctuations in demand for commercial silica; (2) the cyclical nature of our customers’ businesses; (3) operating risks that are beyond our control; (4) federal, state and local legislative and regulatory initiatives relating to hydraulic fracturing; (5) our ability to implement our capacity expansion plans within our current timetable and budget; (6) loss of, or reduction in, business from our largest customers or failure of our customers to pay amounts due to us; (7) increasing costs or a lack of dependability or availability of transportation services or infrastructure; (8) our substantial indebtedness and pension obligations; (9) our ability to attract and retain key personnel and truckload drivers; (10) silica-related health issues and corresponding litigation; (11) seasonal and severe weather conditions; and (12) extensive and evolving environmental, mining, health and safety, licensing, reclamation, trucking and other regulation (and changes in their enforcement or interpretation). Additional information concerning these and other factors can be found in U.S. Silica’s filings with the Securities and Exchange Commission. We undertake no obligation to publicly update or revise any forward-looking statement as a result of new information, future events or otherwise, except as otherwise required by law.

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U.S. SILICA HOLDINGS, INC.

CONSOLIDATED STATEMENTS OF OPERATIONS

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U.S. SILICA HOLDINGS, INC.

CONSOLIDATED BALANCE SHEETS

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Non-GAAP Financial Measures

Segment Contribution Margin

Segment contribution margin is a key metric that management uses to evaluate our operating performance and to determine resource allocation between segments. Segment contribution margin excludes certain corporate costs not associated with the operations of the segment. These unallocated costs include costs related to corporate functional areas such as sales, production and engineering, corporate purchasing, accounting, treasury, information technology, legal and human resources.

The following tables set forth a reconciliation of net income (loss), the most directly comparable GAAP financial measure, to segment contribution margin.

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Adjusted EBITDA

Adjusted EBITDA is not a measure of our financial performance or liquidity under GAAP and should not be considered as an alternative to net income as a measure of operating performance, cash flows from operating activities as a measure of liquidity or any other performance measure derived in accordance with GAAP. Additionally, Adjusted EBITDA is not intended to be a measure of free cash flow for management’s discretionary use, as it does not consider certain cash requirements such as interest payments, tax payments and debt service requirements. Adjusted EBITDA contains certain other limitations, including the failure to reflect our cash expenditures, cash requirements for working capital needs and cash costs to replace assets being depreciated and amortized, and excludes certain non-recurring charges that may recur in the future. Management compensates for these limitations by relying primarily on our GAAP results and by using Adjusted EBITDA only supplementally. Our measure of Adjusted EBITDA is not necessarily comparable to other similarly titled captions of other companies due to potential inconsistencies in the methods of calculation.

The following tables set forth a reconciliation of net income (loss), the most directly comparable GAAP financial measure, to Adjusted EBITDA.

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Investor Contact:

Michael Lawson

Vice President of Investor Relations and Corporate Communications

(301) 682-0304

lawsonm@USSilica.com

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