U.S. Silica Holdings, Inc. (NYSE: SLCA) announced today that it has completed the acquisition of Sandbox Enterprises LLC, a leading provider of innovative logistics solutions and technology for the transportation of proppant used in hydraulic fracturing in the oil and gas industry. Sandbox utilizes specially designed, patent-protected equipment and processes to efficiently and cost-effectively service well site operations.

"This acquisition provides U.S. Silica with unmatched logistics capabilities, enabling us to deliver a transformative value proposition to our customers with Sandbox's unique, proprietary, 'last mile' delivery system," said Bryan Shinn, president and chief executive officer. "Sandbox's containerized approach provides customers with a safer, more reliable delivery solution that de-couples sand delivery from consumption at the well site. We believe Sandbox has tremendous runway to grow in scale and industry adoption and will ultimately create long-term value for our shareholders," he added.

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 nine oil and gas sand production plants. The Company is headquartered in Frederick, Maryland and also has offices located in Chicago, Illinois, and Houston, Texas.