Airgas, Inc. (NYSE: ARG), one of the nation's leading suppliers of industrial, medical, and specialty gases, and related products, today announced that it has been named to Fortune magazine’s 2014 Fortune 500 ® list of the largest U.S. companies. The Fortune 500 list is an annual ranking of all U.S. companies by total revenues for their respective fiscal years. Airgas reported annual revenues of $4.96 billion in its fiscal year 2013. The list also highlights Airgas’ 10-year average total return to investors of 19.4 percent per year, which ranked 42 nd among all Fortune 500 companies. In 2013, Airgas delivered a total return of 24.7 percent to investors, according to Fortune. “The Fortune 500 list includes some of the most successful and respected businesses in the country, and we are proud to be counted among them,” said Michael L. Molinini, Airgas’ President and Chief Executive Officer. “We are especially pleased to be recognized for our commitment to creating shareholder value over the long-term. Being ranked as one of the top 50 U.S. companies for total return to shareholders during the past decade is a testament to our strong execution of strategic growth initiatives, as well as the hard work and dedication of Airgas associates in serving our customers every day across the country.” Airgas, founded in 1982 by Executive Chairman Peter McCausland, became a publicly traded company in 1986 and was added to the S&P 500 Index in 2009. Through more than 450 acquisitions, Airgas has become one of the largest industrial gas companies in the U.S. More than 16,000 associates work in approximately 1,100 locations, including branches, retail stores, gas fill plants, specialty gas labs, production facilities and distribution centers. Airgas was last included in the Fortune 500 list in 2010. Complete results of the Fortune 500 appear in the June 16 issue of Fortune and are available online at fortune.com/fortune500. Fortune 500 ® is a registered trademark of the Fortune magazine division of Time Inc. About Airgas, Inc. Airgas, Inc. (NYSE: ARG), through its subsidiaries, is one of the nation's leading suppliers of industrial, medical and specialty gases, and hardgoods, such as welding equipment and related products. Airgas is a leading U.S. producer of atmospheric gases with 16 air separation plants, a leading producer of carbon dioxide, dry ice, and nitrous oxide, one of the largest U.S. suppliers of safety products, and a leading U.S. supplier of refrigerants, ammonia products, and process chemicals. More than 16,000 employees work in approximately 1,100 locations, including branches, retail stores, gas fill plants, specialty gas labs, production facilities and distribution centers. Airgas also markets its products and services through e-Business, catalog and telesales channels. Its national scale and strong local presence offer a competitive edge to its diversified customer base. For more information, please visit www.airgas.com.