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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
804212	Airgas Inc	ARG	Wholesale-Industrial Machinery & Equipment (5084)	560732648

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1237787	Shaun B Powers	C/O Airgas, Inc. 259 N. Radnor-Chester Road, Suite 100 Radnor PA 19087	Division President - East	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2011-05-09	11,000	$16.52	20,014	No	4	M	Direct
Common Stock	Disposition	2011-05-09	11,000	$68.11	9,014	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Stock Option (Right to Buy)	Disposition	2011-05-09	11,000	$0.00	11,000	$16.52

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
11,500		2012-05-06	No	4	M	Direct

Footnotes

Includes 9,104 shares of Airgas, Inc. common stock acquired pursuant to Airgas, Inc.'s Employee Stock Purchase Plan ("ESPP") as of 5/10/2011, the date of the latest available statement of the reporting person's ESPP holdings. Since 2/20/2009, the date of the statement relied upon for the amount reported on the reporting person's 2/24/2009 Form 4, a total of 1,379 ESPP shares have been acquired in transactions exempt from Section 16(b).
This price represents the average selling price (within a range of $68.05-$68.16) of the shares of common stock of Airgas, Inc. sold by the reporting person, as provided by the reporting person's broker.
These options became exercisable in 25% equal increments on each of 5/6/2003, 5/6/2004, 5/6/2005 and 5/6/2006.
Not Applicable.