X0306 5 2013-03-31 0 0 0000804212 AIRGAS INC ARG 0001535809 Thoman Thomas S C/O AIRGAS, INC. 259 N. RADNOR-CHESTER RD, STE. 100 RADNOR PA 19087 0 1 0 0 Division President - Gases Common Stock 2012-12-11 5 S 0 509 91.13 D 162 D Includes 162 shares of Airgas, Inc. common stock acquired pursuant to Airgas, Inc.'s Employee Stock Purchase Plan ("ESPP") as of 03/31/2013, the date of the latest available statement of the reporting person's ESPP holdings. Since 12/10/2012, the date of the statement relied upon for the amount reported on the reporting person's 12/12/2012 Form 4, a total of 29 ESPP shares have been acquired in transactions exempt from Section 16(b). Robert H. Young, Jr., Attorney-in-Fact for Thomas S. Thoman 2013-05-14