0001104659-06-042191 8-K 1 20060613 2.01 8.01 20060616 20060616 SIMPSON MANUFACTURING CO INC /CA/ 0000920371 3420 943196943 DE 1231 8-K 34 001-13429 06910389 4120 DUBLILN BLVD STE 400 DUBLIN CA 94568 9255609000 4120 DUBLIN BLVD STE 400 DUBLIN CA 94568 8-K 1 a06-13936_18k.htm CURRENT REPORT OF MATERIAL EVENTS OR CORPORATE CHANGES