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 *
GAPONTSEV VALENTIN P
   2. Issuer Name and Ticker or Trading Symbol
IPG PHOTONICS CORP [IPGP] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director __X__ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
CEO & Chairman of the Board
(Last)
(First)
(Middle)
C/O IPG PHOTONICS CORPORATION, 50 OLD WEBSTER ROAD		 3. Date of Earliest Transaction (Month/Day/Year)
09/24/2007
(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 09/24/2007   S(1)   8,747 D $ 18.7315 (2) (3) 11,786,494 D  
Common Stock 09/24/2007   S(1)   17,319 D $ 18.7315 8,186,684 I Through IP Fibre Devices (UK) Ltd. (5)
Common Stock 09/25/2007   S(1)   7,919 D $ 18.814 (4) 11,778,575 D  

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
GAPONTSEV VALENTIN P
C/O IPG PHOTONICS CORPORATION
50 OLD WEBSTER ROAD
OXFORD, MA 01540		   X   X   CEO & Chairman of the Board  

Signatures

 Angelo P. Lopresti, Attorney-in-fact   09/26/2007
**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 23, 2007.
(2) Sales ranged from $18.25 to $18.97 as follows: 26 shares at $18.25; 101 shares at $18.29; 59 shares at $18.30; 24 shares at $18.31; 201 shares at $18.32; 67 shares at $18.33; 34 shares at $18.36; 34 shares at $18.40; 34 shares at $18.46; 430 shares at $18.50; 166 shares at $18.51; 101 shares at $18.52; 18 shares at $18.53; 101 shares at $18.55; 67 shares at $18.56; 34 shares at $18.57; 110 shares at $18.58; 159 shares at $18.59; 302 shares at $18.61; 336 shares at $18.63; 268 shares at $18.64; 34 shares at $18.65; 470 shares at $18.69; 161 shares at $18.70; 67 shares at $18.71; 336 shares at $18.72; 168 shares at $18.73; 34 shares at $18.74; 869 shares at $18.75; 34 shares at $18.76; 267 shares at $18.77; 33 shares at $18.7750; 101 shares at $18.78; 67 shares at $18.79; 201 shares at $18.80; 235 shares at $18.81; 67 shares at $18.83; 67 shares at $18.84; 336 shares at $18.85; 168 shares at $18.86--Continued in Footnote (3).
(3) Continued from Footnote (2): 155 shares at $18.87; 34 shares at $18.8750; 68 shares at $18.88; 134 shares at $18.89; 201 shares at $18.90; 101 shares at $18.91; 470 shares at $18.92; 171 shares at $18.93; 476 shares at $18.94; 67 shares at $18.9450; 134 shares at $18.95; 168 shares at $18.9550; 147 at $18.96; 34 shares at $18.97.
(4) Sales ranged from $18.62 to $18.94 as follows: 34 shares at $18.62; 67 shares at $18.64; 201 shares at $18.65; 101 shares at $18.67; 34 shares at $18.68; 470 shares at $18.69; 168 shares at $18.70; 3 shares at $18.71; 336 shares at $18.72; 107 shares at $18.73; 161 shares at $18.74; 435 shares at $18.75; 67 shares at $18.76; 201 shares at $18.78; 403 shares at $18.79; 235 shares at $18.80; 336 shares at $18.81; 973 shares at $18.82; 134 shares at $18.83; 302 shares at $18.84; 235 shares at $18.85; 34 shares at $18.86; 839 shares at $18.87; 470 shares at $18.88; 97 shares at $18.89; 771 shares at $18.90; 235 shares at $18.91; 302 shares at $18.92; 67 shares at $18.93; 34 shares at $18.95; 67 shares at $18.94.
(5) 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.

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