Statement of Changes in Beneficial Ownership (4)

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	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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 (MM/DD/YYYY) 2/28/2014
(Street) OXFORD, MA 01540 (City) (State) (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) _ X _ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. 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)
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	2/28/2014		A		700 ⁽¹⁾	A	$0	6037	D
Common Stock	3/31/2014		F		55	D	$71.08	5982	D
Common Stock	6/30/2014		F		55	D	$68.80	6091 ⁽²⁾	D
Common Stock	9/30/2014		F		55	D	$68.78	6036	D
Common Stock	12/31/2014		F		55	D	$74.92	6162 ⁽³⁾	D
Common Stock	1/5/2015		M		2900	A	$10.27	9062	D
Common Stock	1/5/2015		S		2900	D	$72.92 ⁽⁴⁾	6162	D
Common Stock	1/5/2015		M		2231	A	$15.82	8393	D
Common Stock	1/5/2015		S		2231	D	$73	6162	D
Common Stock	1/12/2015		S		662	D	$71.43 ⁽⁵⁾	5500	D
Common Stock	1/23/2015		M		2232	A	$15.82	7732	D
Common Stock	1/23/2015		S		2232	D	$75.19	5500	D
Common Stock	1/23/2015		S		1125	D	$75.13	4375	D
Common Stock	2/6/2015		M		2500	A	$21.35	6875	D
Common Stock	2/6/2015		S		2500	D	$80.09	4375	D
Common Stock	2/9/2015		M		2500	A	$21.35	6875	D
Common Stock	2/9/2015		S		2500	D	$85.32	4375	D
Common Stock	2/25/2015		A		1166 ⁽⁶⁾	A	$0	5541	D
Common Stock	3/31/2015		F		222	D	$92.70	5319	D
Common Stock	6/30/2015		F		222	D	$85.18	5265 ⁽⁷⁾	D
Common Stock	9/30/2015		F		221	D	$75.97	5044	D
Common Stock	11/11/2015		M		637	A	$15.82	5681	D
Common Stock	11/11/2015		S		637	D	$90.85	5044	D
Common Stock	11/27/2015		S		200	D	$92.48	4844	D
Common Stock	12/2/2015		S		294	D	$93.70	4550	D
Common Stock	12/31/2015		F		222	D	$89.16	4475 ⁽⁸⁾	D

*Table II - Derivative Securities Beneficially Owned ( e.g.* , puts, calls, warrants, options, convertible securities)**
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. 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		7. Title and Amount of Securities Underlying Derivative Security (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)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)			11. Nature of Indirect Beneficial Ownership (Instr. 4)
Employee Stock Option (right to buy)	$71.77	2/28/2014		A		4400		⁽⁹⁾	2/28/2024	Common Stock	4400.0	$0	4400	D
Employee Stock Option (right to buy)	$10.27	1/5/2015		M			2900	⁽¹⁰⁾	5/7/2019	Common Stock	2900.0	$0	0	D
Employee Stock Option (right to buy)	$15.82	1/5/2015		M			2231	⁽¹¹⁾	2/26/2020	Common Stock	2231.0	$0	2869	D
Employee Stock Option (right to buy)	$15.82	1/23/2015		M			2232	⁽¹¹⁾	2/26/2020	Common Stock	2232.0	$0	637	D
Employee Stock Option (right to buy)	$21.35	2/6/2015		M			2500	⁽¹²⁾	8/5/2020	Common Stock	2500.0	$0	8750	D
Employee Stock Option (right to buy)	$21.35	2/9/2015		M			2500	⁽¹²⁾	8/5/2020	Common Stock	2500.0	$0	6250	D
Employee Stock Option (right to buy)	$97.65	2/25/2015		A		2331		⁽¹³⁾	2/25/2025	Common Stock	2331.0	$0	2331	D
Employee Stock Option (right to buy)	$15.82	11/11/2015		M			637	⁽¹¹⁾	2/26/2020	Common Stock	637.0	$0	0	D

Explanation of Responses:
(1)	Grant of restricted stock units vesting March 1, 2018.
(2)	Includes 164 shares acquired under the IPG employee stock purchase plan on June 30, 2014.
(3)	Includes 181 shares acquired under the IPG employee stock purchase plan on December 31, 2014.
(4)	The reported transaction involves purchase transactions from $72.89 to $72.96 per share. The weighted average price per share was $72.92. 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.
(5)	The reported transaction involves purchase transactions from $70.27 to $75.13 per share. The weighted average price per share was $71.43. 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)	Grant of restricted stock units vesting March 1, 2019.
(7)	Includes 168 shares acquired under the IPG employee stock purchase plan in June 30, 2015.
(8)	Includes 147 shares acquired under the IPG employee stock purchase plan on December 31, 2015.
(9)	Options vesting March 1, 2018.
(10)	Options vest 25% May 7, 2010, 25% May 2, 2011 and 50% May 7, 2012.
(11)	Options vest eight equal quarterly installments commencing March 31, 2013.
(12)	Options vest 25% on August 5, 2011 and the remaining amount in fourteen equal monthly amounts commencing September 30, 2011.
(13)	Options vest March 1, 2019.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	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

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