Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
Mammen Timothy PV
   2. Issuer Name and Ticker or Trading Symbol
IPG PHOTONICS CORP [IPGP] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Vice President & CFO
(Last)
(First)
(Middle)
C/O IPG PHOTONICS CORPORATION, 50 OLD WEBSTER ROAD		 3. Date of Earliest Transaction (Month/Day/Year)
12/10/2007
(Street)

OXFORD, MA 01540		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 12/10/2007   M   16,666 A $ 1.5 108,665 D  
Common Stock 12/10/2007   S(1)   16,666 D $ 20.16 (2) 91,999 D  

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option (right to buy) $ 1.5 12/10/2007   M     16,666   (3) 05/01/2009 Common Stock 16,666 $ 0 1 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Mammen Timothy PV
C/O IPG PHOTONICS CORPORATION
50 OLD WEBSTER ROAD
OXFORD, MA 01540		       Vice President & CFO  

Signatures

 Angelo P. Lopresti, Attorney-in-fact   12/12/2007
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 13, 2007.
(2) Sales ranged from $20.01 to $20.44 as follows: 600 shares at $20.01; 100 shares at $20.04; 200 shares at $20.05; 1,100 shares at $20.06; 200 shares at $20.08; 700 shares at $20.10; 700 shares at $20.11; 300 shares at $20.12; 200 shares at $20.13; 400 shares at $20.13; 100 shares at $20.14; 1,000 shares at $20.15; 1,200 shares at $20.15; 732 shares at $20.16; 900 shares at $20.17; 3,286 shares at $20.17; 200 shares at $20.18; 448 shares at $20.19; 1,800 shares at $20.20; 100 shares at $20.22; 300 shares at $20.23; 100 shares at $20.25; 1,000 shares at $20.28; 100 shares at $20.29; 100 shares at $20.30; 300 shares at $20.31; 100 shares at $20.34; 200 shares at $20.35; 100 shares at $20.38; and 100 shares at $20.44.
(3) These options became exercisable in 4 equal installments beginning on 5/1/00.

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