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 *

Burns Thomas William
2. Issuer Name and Ticker or Trading Symbol

GLAUKOS Corp [ GKOS ]
5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

__X__ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
Chief Executive Officer
(Last)          (First)          (Middle)

C/O GLAUKOS CORPORATION, 229 AVENIDA FABRICANTE
3. Date of Earliest Transaction (MM/DD/YYYY)

5/20/2020
(Street)

SAN CLEMENTE, CA 92672
(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 5/20/2020  M  200 A$3.975 306089 (1)D  
Common Stock 5/20/2020  M  200 A$3.975 306289 (1)D  
Common Stock 5/20/2020  S(2)  400 D$38.0533 (3)305889 (1)D  
Common Stock         238107 I Through the Burns Annuity Trust 
Common Stock         120000 I Through the Burns Charitable Remainder Trust 
Common Stock         277847 I Through the Burns Family Trust 
Common Stock         100000 I Through the Janet M. Burns Irrevocable Trust 
Common Stock         100000 I Through the Thomas W. Burns Irrevocable Trust 

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 Security3. Trans. Date3A. Deemed Execution Date, if any4. 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 Date7. 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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Option (Right to Buy) $3.975 5/20/2020  M (2)    200   (4)1/27/2021 Common Stock 200 $0 138600 D  
Stock Option (Right to Buy) $3.975 5/20/2020  M (2)    200   (5)4/28/2021 Common Stock 200 $0 68847 D  

Explanation of Responses:
(1) Includes 44,614 restricted stock units that have not yet vested or been delivered to the Reporting Person.
(2) These trades were made pursuant to a Rule 10b5-1 trading plan with pre-determined share amounts and prices.
(3) This transaction was executed in multiple trades at prices ranging from $38.01 to $38.09. The price reported above reflects the weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
(4) This option was granted on January 27, 2011 and has a four-year vesting schedule in which 25% vested on the first year anniversary date of the grant and the remainder vested in equal monthly installments for 36 months thereafter, such that the stock option vests in full on the four-year anniversary of the grant date.
(5) This option was granted on April 28, 2011 and has a four-year vesting schedule in which 25% vested on the first year anniversary date of the grant and the remainder vested in equal monthly installments for 36 months thereafter, such that the stock option vests in full on the four-year anniversary of the grant date.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
Burns Thomas William
C/O GLAUKOS CORPORATION
229 AVENIDA FABRICANTE
SAN CLEMENTE, CA 92672
X
Chief Executive Officer

Signatures
/s/ Robert L. Davis, Attorney-in-Fact5/22/2020
**Signature of Reporting PersonDate

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