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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
1378552	F William Krupke	C/O Ipg Photonics Corporation 50 Old Webster Road Oxford MA 01540		Yes	No	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	Disposition	2013-02-14	634	$70.01	11,700	No	4	S	Direct

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

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Director Stock Options (Right to buy)	Disposition	2009-12-10	5,000	$0.00	5,000	$1.50
Common Stock	Director Stock Options (Ricght to buy)	Disposition	2009-12-10	3,334	$0.00	3,334	$6.54

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
5,000		2015-06-12	No	4	M	Direct
1,667		2016-06-21	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 11, 2012.
The reported transaction involved sales transactions from $70.00 to $70.07 per share. The weighted average price per share was $70.01. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder ofthe information regarding the number of shares sold at each separate price.
This amendment is being filed to reflect the acquisition of 8,334 shares on December 10, 2009 from the execise of stock options. See notes 4 and 5 below.
Exercisable in four equal annual installments commencing on June 12, 2006.
Exercisable in four equal annual installments commencing on June 21, 2007.