X0202 4/A 2006-12-01 2006-12-05 0000804212 AIRGAS INC ARG 0001381453 Smyth Thomas M C/O AIRGAS, INC. 259 N. RADNOR-CHESTER ROAD, SUITE 100 RADNOR PA 19087 0 1 0 0 VP and Controller Common Stock 2006-12-01 4 M 0 3150 16.52 A 3551 D Common Stock 2006-12-01 4 S 0 3150 42.50 D 401 D Common Stock 644 I By 401(k) plan. Stock Option (Right to Buy) 16.52 2006-12-01 4 M 0 3150 D 2012-05-06 Common Stock 3150 3150 D Includes 401 shares of Airgas, Inc. common stock acquired pursuant to Airgas, Inc.'s Employee Stock Purchase Plan ("ESPP") as of 11/15/2006, the date of the latest available statement of the reporting person's ESPP holdings. The information presented is as of 11/15/2006, the date of the latest available statement of the reporting person's holdings of Airgas, Inc. common stock in his 401(k) plan. Options became exercisable in 25% equal increments on each of 5/6/2002, 5/6/2003, 5/6/2004 and 5/6/2005. Not Applicable Remarks: This Amendment to the Form 4 filed by the Reporting Person on December 5, 2006 is being filed to correct (i) the number of shares of Common Stock beneficially owned directly by the Reporting Person in Table 1 and (ii) to properly reorder the footnotes contained in the Form. Thomas M. Smyth 2006-12-06