X0202 4 2008-05-13 0000804212 AIRGAS INC ARG 0001237791 VISINTAINER PATRICK M C/O AIRGAS, INC. 259 N. RADNOR-CHESTER RD, STE. 100 RADNOR PA 19087 1 1 0 0 Senior Vice President, Sales Common Stock 2008-05-13 4 M 0 1250 11.50 A 5472 D Common Stock 2008-05-13 4 M 0 4000 16.52 A 9472 D Common Stock 2008-05-13 4 S 0 1250 59.01 D 8222 D Common Stock 2008-05-13 4 S 0 4000 59.01 D 4222 D Common Stock 555 I By 401(k) plan Common Stock 100 I By immediate family Stock Option (Right to Buy) 11.50 2008-05-13 4 M 0 1250 D 2009-05-18 Common Stock 1250 0 D Stock Option (Right to Buy) 16.52 2008-05-13 4 M 0 4000 D 2012-05-06 Common Stock 4000 11200 D Includes 4,222 shares of Airgas, Inc. common stock acquired pursuant to Airgas, Inc.'s Employee Stock Purchase Plan ("ESPP") as of 5/14/2008, the date of the latest available statement of the reporting person's ESPP holdings. Since 12/6/2007, the date of the statement for the amount reported on the reporting person's Form 4 filed 12/7/2007, a total of 54 ESPP shares have been acquired in transactions exempt under Section 16(b). This information presented is as of 5/14/08, the date of the latest available statement of the reporting person's holdings of Airgas, Inc. common stock in his 401(k) plan. Since 12/6/2007, the date of the statement for the amount reported on the reporting person's Form 4 filed 12/7/2007, a total of 2 shares have been acquired in the 401(k) plan in transactions exempt under Section 16(b). These shares are owned by a parent of the reporting person who does not live in the same household as the reporting person. The reporting person disclaims beneficial onwership of the securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose. These options became exercisable in 25% equal increments on each of 5/18/2000, 5/18/2001, 5/18/2002 and 5/18/2003. Not applicable. These options became exercisable in 25% equal increments on each of 5/6/2003, 5/6/2004, 5/6/2005 and 5/6/2006. Robert H. Young, Jr., Attorney-in-Fact for Patrick M. Visintainer 2008-05-14