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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1111928	Ipg Photonics Corp	IPGP	Semiconductors & Related Devices (3674)	043444218

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1378546	Pv Timothy Mammen	C/O Ipg Photonics Corporation 50 Old Webster Road Oxford MA 01540	Vice President & Cfo	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2010-08-03	26,666	$5.37	123,040	No	4	M	Direct
Common Stock	Disposition	2010-08-03	26,666	$19.60	96,374	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Employee Stock Option (right to buy)	Disposition	2010-08-03	26,666	$0.00	26,666	$5.37

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
26,668		2016-04-18	No	4	M	Direct

Footnotes

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 15, 2009.
The reported transaction involved sales transactions from $19.50 to $19.95 per share. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer information regarding the number of shares sold at each separate price.
These options are exercisable in five equal annual installments of 13,333 shares beginning on 4/18/07.