S Robert Hillas

Insider Trading: Sales

Symbol	Price	Amount	Total Value	Remaining Holdings	Date	Form 4
ATMI	$19.90	54	$1,074.60	50,452	2012-12-12	Filing
ATMI	$19.83	2,790	$55,324.31	50,506	2012-12-11	Filing
ATMI	$20.26	1,800	$36,464.04	50,096	2012-12-05	Filing