X0303 5 2010-03-31 0 0 0000804212 AIRGAS INC ARG 0001193024 SNEED PAULA A C/O AIRGAS, INC. 259 N. RADNOR-CHESTER ROAD, STE. 100 RADNOR PA 19087 1 0 0 0 Phantom Stock 2009-06-30 5 A 0 5.51 40.53 A Common Stock 5.51 2333.2 D Acquired pursuant to Airgas, Inc.'s deferred compensation plan as a result of either (1) the deferral of director's compensation or (2) the reinvestment under the plan of dividends declared and paid with respect to shares of Airgas, Inc.'s common stock underlying the phantom stock. Each share of phantom stock represents the right to receive the cash value of one share of Airgas, Inc. common stock. Shares of phantom stock are payable in cash following the reporting person's termination of service as a director with Airgas, Inc. The reporting person may transfer her phantom stock account into an alternative investment account under the plan at any time. Robert H. Young, Jr., Attorney-in-Fact for Paula A. Sneed 2010-05-14