Airgas, Inc. (NYSE: ARG) Executive Vice President and Chief Operating Officer Michael L. Molinini will speak at the William Blair 31 st Annual Growth Stock Conference in Chicago, IL, on Wednesday, June 15, at 12:00 p.m. CT (1:00 p.m. ET). Interested parties may listen to a live webcast or replay until July 15 by accessing http://investor.shareholder.com/arg/events.cfm. Presentation slides will be available for download by 8:00 a.m. ET on June 15 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 the largest U.S. distributor of industrial, medical, and specialty gases, and hardgoods, such as welding equipment and supplies. Airgas is also one of the largest U.S. distributors of safety products, the largest U.S. producer of nitrous oxide and dry ice, the largest liquid carbon dioxide producer in the Southeast, and a leading distributor of process chemicals, refrigerants, and ammonia products. More than 14,000 employees work in approximately 1,100 locations, including branches, retail stores, gas fill plants, specialty gas labs, production facilities and distribution centers. Airgas also distributes its products and services through eBusiness, 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.

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