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Matrix Awarded International Organization for Standardization (ISO) Management System Certification

ARLP | July 13, 2016

Matrix Awarded International Organization for Standardization (ISO) Management System Certification

Matrix Design Group, LLC (“Matrix”) announced today it was awarded the International Organization for Standardization (ISO) 9001:2015 Management System Certification by Intertek Group PLC.

ISO 9001:2015 Certification is the world’s most widely recognized standard for quality management systems (QMS). The standard helps organizations consistently meet the needs of customers and other key stakeholders in both the delivery and continuous improvement of products and services. The 2015 edition, ISO 9001:2015, features important changes that bring ISO 9001 into the 21st century, focusing on performance and combining the process approach with risk-based thinking.

“As a leading provider of safety and technology systems to the mining market, Matrix is proud to have achieved ISO 9001:2015 Certification,” said Matrix President, David Clardy. “This certification reflects our commitment to continuously improve the quality, durability and reliability of our systems for our customers, while helping provide them with lower cost of ownership and lower cost per ton, all of which is vitally important to our clients during these challenging market conditions.”

For more information on Matrix and its products, please visit www.MatrixTeam.com.

About Matrix Design Group, LLC

Matrix is a designer, developer and marketer of safety and productivity technology for use in the underground mining industry. Its innovative, industry-leading systems include proximity detection, communications, tracking, mine atmospheric monitoring, lighting and cameras. Matrix is a subsidiary of Alliance Resource Partners, L.P. (NASDAQ: ARLP). For more information, see www.matrixteam.com

About Alliance Resource Partners, L.P.

ARLP is a diversified producer and marketer of coal to major United States utilities and industrial users. ARLP, the nation’s first publicly traded master limited partnership involved in the production and marketing of coal, is currently the second largest coal producer in the eastern United States with mining operations in the Illinois Basin and Appalachian coal producing regions.

ARLP currently operates nine mining complexes in Illinois, Indiana, Kentucky, Maryland and West Virginia. ARLP also operates a coal loading terminal on the Ohio River at Mount Vernon, Indiana.

News, unit prices and additional information about ARLP, including filings with the Securities and Exchange Commission, are available at http://www.arlp.com. For more information, contact the investor relations department of Alliance Resource Partners, L.P. at (918) 295-7674 or via e-mail at investorrelations@arlp.com.