Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF 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 *
  PLATONOV NIKOLAI
 2. Date of Event Requiring Statement (Month/Day/Year)
12/17/2010		 3. Issuer Name and Ticker or Trading Symbol
IPG PHOTONICS CORP [IPGP]
(Last)
(First)
(Middle)
C/O IPG PHOTONICS CORPORATION, 50 OLD WEBSTER ROAD		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

OXFORD, MA 01540		 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 Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 15,500,402
I (1)
By The Valentin Gapontsev Trust I

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Options (right to buy)   (2) 05/17/2019 Common Stock 3,000 $ 10.27 D  
Employee Stock Options (right to buy)   (3) 02/25/2020 Common Stock 3,000 $ 15.82 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
PLATONOV NIKOLAI
C/O IPG PHOTONICS CORPORATION
50 OLD WEBSTER ROAD
OXFORD, MA 01540		     X    

Signatures

Angelo P. Lopresti, Attorney-in-fact 12/21/2010
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(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) Includes shares directly and indirectly owned by The Valentin Gapontsev Trust I, of which the Reporting Person is a trustee. 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 any or all the reported shares for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.
(2) 750 options are exercisable on each of May 7, 2010 and May 7, 2011, and 1,500 options are exercisable on May 7, 2011.
(3) Exercisable in eight equal quarterly installments starting March 31, 2013.

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