0001193125-09-245391 424B3 2 20091202 20091202 GALLAGHER ARTHUR J & CO 0000354190 6411 362151613 DE 1231 424B3 33 333-152710 091215977 TWO PIERCE PLACE ITASCA IL 60143 6307733800 TWO PIERCE PLACE ITASCA IL 60143-3141 424B3 1 d424b3.htm AMENDMENT #17 TO PROSPECTUS SUPPLEMENT GRAPHIC 2 g11743snap0002.gif GRAPHIC