X0202 4 2008-06-09 0001111928 IPG PHOTONICS CORP IPGP 0001378668 BuAbbud George H C/O IPG PHOTONICS CORPORATION 50 OLD WEBSTER ROAD OXFORD MA 01540 0 1 0 0 Vice President Common Stock 2008-06-09 4 M 0 12100 1.50 A 32100 D Common Stock 2008-06-09 4 S 0 12100 18.94 D 20000 D Employee Stock Option (right to buy) 1.50 2008-06-09 4 M 0 12100 0 D 2012-06-14 Common Stock 12100 127900 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 7, 2008. Sales ranged from $18.78 to $19.29 as follows: 100 shares at $18.7800; 1,200 shares at $18.80; 874 shares at $18.81; 400 shares at $18.82; 1,600 shares at $18.84; 26 shares at $18.85; 392 shares at $18.86; 408 shares at $18.87; 941 shares at $18.90; 200 shares at $18.91; 279 shares at $18.92; 300 shares at $18.93; 521 shares at $18.94; 400 shares at $18.95; 300 shares at $18.96; 200 shares at $18.97; 659 shares at $18.99; 700 shares at $19.00; 200 shares at $19.01; 100 shares at $19.06; 500 shares at $19.08; 300 shares at $19.13; 500 shares at $19.14; 300 shares at $19.15; 100 shares at $19.16; 100 shares at $19.18; 92 shares at $19.19; 58 shares at $19.21; 50 shares at $19.25; and 300 shares at $19.29. Mr. BuAbbud was granted options to purchase 200,000 shares. 20,000 of these options vested immediately, and the remaining vested in four equal annual installments of 50,000 shares beginning on 6/14/03. Angelo P. Lopresti, Attorney-in-fact 2008-06-11