COHR Coherent Corp

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                                                                                   
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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 * Merk Thomas	2. Issuer Name and Ticker or Trading Symbol COHERENT INC [ COHR ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director                    _____ 10% Owner __X__ Officer (give title below)    _____ Other (specify below) EVP & GM, ILS
(Last)          (First)          (Middle) 5100 PATRICK HENRY DRIVE	3. Date of Earliest Transaction (MM/DD/YYYY) 11/15/2019
(Street) SANTA CLARA, CA 95054 (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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	11/15/2019		M		3441	A	$0.00	8041	D
Common Stock	11/15/2019		A		963 (1)	A	$0.00	9004	D
Common Stock	11/15/2019		F		2275 (2)	D	$155.84	6729	D
Common Stock	11/15/2019		A		2567 (3)	A	$0.00	9296 (4)	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Performance Restricted Stock Units	$0.00	11/15/2019		M			3441	(5)	11/15/2019	Common Stock	3441	$0.00	1147	D
Performance Restricted Stock Units	$0.00	11/15/2019		A		2096		(6)	11/15/2022	Common Stock	2096	$0.00	2096	D

Explanation of Responses:
(1)	Additional shares acquired pursuant to the achievement of 128% of the performance criteria beyond the target number, as described in footnote (5) on Table II.
(2)	Represents shares withheld to satisfy minimum tax withholding obligations for released restricted stock units.
(3)	On November 15, 2019 the Reporting Person was granted 2567 Restricted Stock Units which will vest in three equal installments on each of November 15, 2020, November 15, 2021 and November 15, 2022.
(4)	Includes 4990 Restricted Stock Units.
(5)	This Performance Restricted Stock Unit award vested on the three year anniversary of the grant based on the relative performance of the underlying stock versus the Russell 2000 Index for the 90 trading days on and prior to November 15, 2019 versus the same 90 trading day period ending November 15, 2016. The number of shares in the table reflects the target number of achieved RSUs. The actual range of RSUs was 0-200% of the target number, depending upon the achievement results at the measurement date.
(6)	This Performance Restricted Stock Unit award vests after the three year anniversary of the grant based on the relative performance of the underlying stock versus the Russell 1000 Index for the 90 trading days on and prior to November 15, 2022 versus the same 90 trading day period ending November 15, 2019. The number of shares in the table reflects the number of RSUs at target. The actual range of RSUs is 0-200% of the target number, depending upon what achievement, if any, results at the measurement date.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Merk Thomas 5100 PATRICK HENRY DRIVE SANTA CLARA, CA 95054			EVP & GM, ILS

Signatures
/s/ Rhonda Fassbender, pursuant to Power of Attorney		11/19/2019
**Signature of Reporting Person		Date