0001181431-08-051611 4 1 20080902 20080904 20080904 IPG PHOTONICS CORP 0001111928 3674 043444218 DE 50 OLD WEBSTER ROAD OXFORD MA 01540 5083731100 50 OLD WEBSTER ROAD OXFORD MA 01540 CHILD MICHAEL C 0001262095 4 34 001-33155 081056899 6175746781 125 HIGH ST STE 2500 BOSTON MA 02110 4 1 rrd217937.xml FORM 4