X0202 4 2007-10-24 0001111928 IPG PHOTONICS CORP IPGP 0001130421 GAPONTSEV VALENTIN P C/O IPG PHOTONICS CORPORATION 50 OLD WEBSTER ROAD OXFORD MA 01540 1 1 1 0 CEO & Chairman of the Board Common Stock 2007-10-24 4 S 0 3000 20.16 D 11746009 D Common Stock 2007-10-24 4 S 0 8300 20.20 D 8129202 I Through IP Fibre Devices (UK) Ltd. Common Stock 2007-10-25 4 S 0 11200 19.78 D 8118002 I Through IP Fibre Devices (UK) Ltd. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 23, 2007. Sales ranged from $20.03 to $20.36 as follows: 100 shares at $20.03; 100 shares at $20.06; 200 shares at $20.08; 500 shares at $20.10; 100 shares at $20.11; 600 shares at $20.12; 100 shares at $20.13; 300 shares at $20.14; 100 shares at $20.16; 200 shares at $20.19; 200 shares at $20.25; 200 shares at $20.26; 200 shares at $20.32; and 100 shares at $20.36. Sales range from $20.07 to $20.41 as follows: 200 shares at $20.07; 800 shares at $20.10; 200 shares at $20.11; 800 shares at $20.12; 400 shares at $20.13; 300 shares at $20.14; 100 shares at $20.145; 542 shares at $20.15; 200 shares at $20.16; 100 shares at $20.165; 400 shares at $20.1700; 500 shares at $20.19; 500 shares at $20.20; 38 shares at $20.21; 162 shares at $20.22; 500 shares at $20.25; 500 shares at $20.26; 50 shares at $20.28; 400 shares at $20.29; 350 shares at $20.30; 200 shares at $20.31; 500 shares at $20.32; 100 shares at $20.33; 100 shares at $20.35; 258 shares at $20.36; and 100 shares at $20.41. The reporting person is the managing director of IP Fibre Devices (UK) Ltd. and has voting and investment power with respect to the shares held of record by IP Fibre Devices (UK) Ltd. The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of the beneficial ownership of all the reported shares for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose. Sales range from $19.18 to $20.32 as follows: 100 shares at $19.18; 100 shares at $19.20; 500 shares at $19.24; 100 shares at $19.25; 500 shares at $19.29; 100 shares at $19.33; 100 shares at $19.34; 200 shares at $19.35; 100 shares at $19.36; 700 shares at $19.37; 200 shares at $19.38; 300 shares at $19.42; 700 shares at $19.44; 100 shares at $19.45; 400 shares at $19.45; 200 shares at $19.46; 100 shares at $19.47; 100 shares at $19.49; 200 shares at $19.50; 100 shares at $19.52; 500 shares at $19.54; 200 shares at $19.56; 100 shares at $19.83; 100 shares at $19.90; 100 shares at $19.93; 100 shares at $19.97; 72 shares at $19.98; 28 shares at $19.99; 164 shares at $20.10; 100 shares at $20.11; 936 shares at $20.12; 211 shares at $20.13; 882 shares at $20.15; 192 shares at $20.16; 715 shares at $20.17; 100 shares at $20.18; 100 shares at $20.19; 100 shares at $20.20; 300 shares at $20.22; 142 shares at $20.23; 58 shares at $20.24; 142 shares at $20.25. Continued Footnote 6. 222 shares at $20.26; 236 shares at $20.27; 300 shares at $20.30; and 200 shares at $20.32. Angelo P. Lopresti, Attorney-at-law 2007-10-26