X0202 4 2004-08-31 0000804212 AIRGAS INC ARG 0001237791 VISINTAINER PATRICK M C/O AIRGAS, INC. 259 N. RADNOR-CHESTER ROAD RADNOR PA 19087 0 1 0 0 Senior Vice President - Sales Common Stock 2004-08-31 4 M 0 1875 8.50 A 5557 D Common Stock 2004-08-31 4 M 0 1500 15.63 A 7057 D Common Stock 2004-08-31 4 M 0 1000 13.50 A 8057 D Common Stock 2004-08-31 4 M 0 1000 15.25 A 9057 D Common Stock 2004-08-31 4 M 0 2000 15.94 A 11057 D Common Stock 2004-08-31 4 M 0 5000 11.50 A 16057 D Common Stock 2004-08-31 4 M 0 6000 8.99 A 22057 D Common Stock 2004-08-31 4 S 0 18375 22.00 D 3682 D Common Stock 556 I By 401(k) Plan Common Stock 40 I By Immediate Family Stock Option (Right to Buy) 8.50 2004-08-31 4 M 0 1875 D 2009-03-04 Common Stock 1875 0 D Stock Option (Right to Buy) 15.63 2004-08-31 4 M 0 1500 D 2007-05-14 Common Stock 1500 2500 D Stock Option (Right to Buy) 13.50 2004-08-31 4 M 0 1000 D 2007-12-10 Common Stock 1000 4000 D Stock Option (Right to Buy) 15.25 2004-08-31 4 M 0 1000 D 2008-04-27 Common Stock 1000 4000 D Stock Option (Right to Buy) 15.94 2004-08-31 4 M 0 2000 D 2008-05-14 Common Stock 2000 8000 D Stock Option (Right to Buy) 11.50 2004-08-31 4 M 0 5000 D 2009-05-18 Common Stock 5000 4750 D Stock Option (Right to Buy) 8.99 2004-08-31 4 M 0 6000 D 2011-05-08 Common Stock 6000 11250 D Includes 3,682 shares of Airgas, Inc. common stock acquired pursuant to the Airgas, Inc. 1998 Employee Stock Purchase Plan ("ESPP") as of 9/1/2004, the date of the latest available statement of the reporting person's ESPP account. Since 8/13/2003, the date of the statement relied upon for the amount reported on the reporting person's 9/8/2003 Form 4, a total of 222 shares have been acquired in transactions exempt from Section 16(b) pursuant to Rule 16b-3(c). The information presented is as of 9/1/2004, the date of the latest available statement of the reporting person's holdings of Airgas, Inc. common stock in his 401(k) plan. Options are exercisable in 25% annual increments on each of 3/4/2000, 3/4/2001, 3/4/2002 and 3/4/2003. Options are exercisable in 25% annual increments on each of 5/14/1998, 5/14/1999, 5/14/2000 and 5/14/2001. Options are exercisable in 25% annual increments on each of 12/10/1998, 12/10/1999, 12/10/2000 and 12/10/2001. Options are exercisable in 25% annual increments on each of 4/27/1999, 4/27/2000, 4/27/2001 and 4/27/2002. Options are exercisable in 25% annual increments on each of 5/14/1999, 5/14/2000, 5/14/2001 and 5/14/2002. Options are exercisable in 25% annual increments on each of 5/18/2000, 5/18/2001, 5/18/2002 and 5/18/2003. Options are exercisable in 25% annual increments on each of 5/8/2002, 5/8/2003, 5/8/2004 and 5/8/2005. Not applicable. Todd R. Craun, Attorney-in-Fact 2004-09-02