Airgas, Inc. (NYSE: ARG) today announced that Senior Vice President and Chief Financial Officer Robert M. McLaughlin will present at William Blair’s 34 th Annual Growth Stock Conference in Chicago, IL, on Wednesday, June 11, at 8:00 a.m. CT (9:00 a.m. ET). Interested parties may listen to a live webcast or replay until July 11 by accessing http://investor.shareholder.com/arg/events.cfm. Presentation slides will be available for download by 8:00 a.m. ET on June 11 in the Investor Information section of the Company’s website at http://investor.shareholder.com/arg/slides.cfm. 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.