0001181431-08-036454 4 1 20080530 20080603 20080603 IPG PHOTONICS CORP 0001111928 3674 043444218 DE 50 OLD WEBSTER ROAD OXFORD MA 01540 5083731100 50 OLD WEBSTER ROAD OXFORD MA 01540 TA ASSOCIATES AP IV LP 0001235813 DE 1231 4 34 001-33155 08878563 125 HIGH STREET SUITE 2500 BOSTON MA 02110 6175746781 125 HIGH STREET SUITE 2500 BOSTON MA 02110 TA / ATLANTIC & PACIFIC IV LP 0001235807 DE 1231 4 34 001-33155 08878564 125 HIGH STREET SUITE 2500 BOSTON MA 02110 6175746781 125 HIGH STREET SUITE 2500 BOSTON MA 02110 TA ASSOCIATES VIII LLC 0001235812 DE 1231 4 34 001-33155 08878565 125 HIGH STREET SUITE 2500 BOSTON MA 02110 6175746781 125 HIGH STREET SUITE 2500 BOSTON MA 02110 TA ADVENT VIII LP 0001106837 DE 1231 4 34 001-33155 08878566 125 HIGH ST BOSTON MA 02110 125 HIGH ST BOSTON MA 02110 TA ASSOCIATES IX LLC 0001235811 DE 1231 4 34 001-33155 08878567 125 HIGH STREET SUITE 2500 BOSTON MA 02110 6175746781 125 HIGH STREET SUITE 2500 BOSTON MA 02110 TA INVESTORS LLC 0001235809 DE 1231 4 34 001-33155 08878570 125 HIGH STREET SUITE 2500 BOSTON MA 02110 6175746781 125 HIGH STREET SUITE 2500 BOSTON MA 02110 TA EXECUTIVES FUND LLC 0001268755 DE 1231 4 34 001-33155 08878571 125 HIGH STREET SUITE 2500 BOSTON MA 02110 6175746735 TA IX LP 0001121410 DE 1231 4 34 001-33155 08878568 HIGH STREET TOWER BOSTON MA 02110 125 HIGH ST STE 2500 BOSTON MA 02110 TA ASSOCIATES INC 0001034569 4 34 001-33155 08878569 125 HIGH STREET SUITE 2500 BOSTON MA 02110 6175746781 125 HIGH STREET SUITE 2500 BOSTON MA 02110 4 1 rrd209645.xml FORM 4