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 *
Burgomaster Thomas J
   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)
Chief Accounting Officer
(Last)
(First)
(Middle)
50 OLD WEBSTER ROAD		 3. Date of Earliest Transaction (Month/Day/Year)
02/18/2016
(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 02/18/2016   A   1,215 (1) A $ 0 5,690 D  
Common Stock 03/18/2016   M   900 A $ 21.35 6,590 D  
Common Stock 03/18/2016   S   900 D $ 95.04 5,690 D  
Common Stock 03/28/2016   M   1,600 A $ 21.35 7,290 D  
Common Stock 03/28/2016   S   1,600 D $ 95.21 5,690 D  
Common Stock 03/31/2016   F   90 D $ 96.08 5,600 D  
Common Stock 04/26/2016   M   2,500 A $ 53.76 8,100 D  
Common Stock 04/26/2016   S   2,500 D $ 100.36 5,600 D  
Common Stock 06/30/2016   F   90 D $ 80 5,655 (2) D  
Common Stock 09/30/2016   F   90 D $ 82.35 5,565 D  
Common Stock 12/31/2016   F   90 D $ 98.71 5,631 (3) D  
Common Stock 02/17/2017   A   814 (4) A $ 0 6,445 D  
Common Stock 03/01/2017   F   265 D $ 120.75 6,180 D  
Common Stock 06/05/2017   M   3,750 A $ 21.35 9,930 D  
Common Stock 06/05/2017   S   3,750 D $ 141.44 6,180 D  
Common Stock 06/06/2017   M   1,102 A $ 53.76 7,282 D  
Common Stock 06/06/2017   S   1,102 D $ 145.48 6,180 D  
Common Stock 06/07/2017   M   1,571 A $ 53.76 7,751 D  
Common Stock 06/07/2017   S   1,571 D $ 145.06 (5) 6,180 D  
Common Stock 06/08/2017   M   326 A $ 53.76 6,506 D  
Common Stock 06/08/2017   S   326 D $ 145.32 6,180 D  
Common Stock 06/15/2017   S   1,669 D $ 137.82 4,511 D  
Common Stock 07/07/2017   M   3,001 A $ 53.76 7,512 D  
Common Stock 07/07/2017   S   3,001 D $ 150.52 (6) 4,637 (7) D  
Common Stock 02/22/2018   A   523 (8) A $ 0 5,246 (9) D  
Common Stock 03/01/2018   F   219 D $ 243.96 5,027 D  
Common Stock 03/01/2018   F   64 D $ 243.96 4,963 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
Employee Stock Option (right to buy) $ 81.89 02/18/2016   A   2,431     (10) 02/18/2026 Common Stock 2,431 $ 0 2,431 D  
Employee Stock Option (right to buy) $ 21.35 03/18/2016   M     900   (11) 08/05/2020 Common Stock 900 $ 0 5,350 D  
Employee Stock Option (right to buy) $ 21.35 03/28/2016   M     1,600   (11) 08/05/2020 Common Stock 1,600 $ 0 3,750 D  
Employee Stock Option (right to buy) $ 53.76 04/26/2016   M     2,500   (12) 03/01/2021 Common Stock 2,500 $ 0 8,400 D  
Employee Stock Option (right to buy) $ 119.5 02/17/2017   A   2,493     (13) 02/17/2027 Common Stock 2,493 $ 0 2,493 D  
Employee Stock Option (right to buy) $ 21.35 02/18/2016   M     3,750   (11) 08/05/2020 Common Stock 3,750 $ 0 0 D  
Employee Stock Option (right to buy) $ 53.76 06/06/2017   M     1,102   (12) 03/01/2021 Common Stock 1,102 $ 0 7,298 D  
Employee Stock Option (right to buy) $ 53.76 06/07/2017   M     1,571   (12) 03/01/2021 Common Stock 1,571 $ 0 5,727 D  
Employee Stock Option (right to buy) $ 53.76 06/08/2017   M     326   (12) 03/01/2021 Common Stock 326 $ 0 5,401 D  
Employee Stock Option (right to buy) $ 53.76 07/07/2017   M     3,001   (12) 03/01/2021 Common Stock 3,001 $ 0 2,400 D  
Employee Stock Option (right to buy) $ 239.72 02/22/2018   A   1,790     (14) 02/22/2028 Common Stock 1,790 $ 0 1,790 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Burgomaster Thomas J
50 OLD WEBSTER ROAD
OXFORD, MA 01540		       Chief Accounting Officer  

Signatures

 /s/ Angelo P. Lopresti, Attorney-in-fact   10/31/2018
**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) Grant of restricted stock units vesting March 1, 2020.
(2) Includes 145 shares acquired under the IPG employee stock purchase plan on June 30, 2016.
(3) Includes 156 shares acquired under the IPG employee stock purchase plan on December 31, 2016.
(4) Grant of restricted stock units vest in four annual equal installments commencing on March 1, 2018.
(5) The reported transaction involves purchase transactions from $145.00 to $145.25 per share. The weighted average price per share was $145.06. 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 purchased at each separate price.
(6) The reported transaction involves purchase transactions from $150.00 to $150.94 per share. The weighted average price per share was $150.52. 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 purchased at each separate price.
(7) Includes 126 shares acquired under the IPG employee stock purchase plan on June 30, 2017.
(8) Grant of restricted stock units vest in four annual equal installments commencing on March 1, 2019.
(9) Includes 86 shares acquired under the IPG employee stock purchase plan in December 31, 2017.
(10) Options vest March 1, 2020.
(11) Options vest 25% on August 5, 2011 and the remaining amount in fourteen equal monthly amounts commencing September 30, 2011.
(12) Options vest 25% quarterly commencing March 31, 2015.
(13) Options vest in four annual equal installments commencing on March 1, 2018.
(14) Options vest in four annual equal installments commencing on March 1, 2019.

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