Statement of Changes in Beneficial Ownership (Form 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). Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

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 or Section 30(h) of the Investment Company Act of 1940

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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) CHAIRMAN & CEO (Last) (First) (Middle) C/O GLAUKOS CORPORATION, ONE GLAUKOS WAY 3. Date of Earliest Transaction (Month/Day/Year) 01/08/2026 (Street) ALISO VIEJO, CA 92656 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 01/08/2026 M 88,055 A $16.49 241,830(1) D Common Stock 01/08/2026 S(2) 88,055 D $115 153,775(1) D Common Stock 01/16/2026 M 186,945 A $16.49 340,720(1) D Common Stock 01/16/2026 S(2) 186,945 D $115 153,775(1) D Common Stock 893,932 I Through the Burns Family Trust Common Stock 238,107 I Through the Burns Annuity Trust Common Stock 120,000 I Through the Burns Charitable Remainder Trust Common Stock 100,000 I Through the Thomas W. Burns Irrevocable Trust Common Stock 100,000 I Through the Janet M. Burns Irrevocable Trust

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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

Stock Option (Right to Buy)

$16.49

01/08/2026

M(3)

88,055

(4)

03/10/2026

Common Stock

88,055

$ 0

186,945

D

Stock Option (Right to Buy)

$16.49

01/16/2026

M(3)

186,945

(4)

03/10/2026

Common Stock

186,945

$ 0

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Burns Thomas William C/O GLAUKOS CORPORATION ONE GLAUKOS WAY ALISO VIEJO, CA 92656	X		CHAIRMAN & CEO

Signatures

Diana Scherer, Attorney-in-Fact		01/20/2026
**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)	Includes 89,621 restricted stock units that have not yet vested or been delivered to the Reporting Person.
(2)	The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 10, 2025 with respect to options that expire on March 10, 2026.
(3)	The option exercises in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 10, 2025 with respect to options that expire on March 10, 2026.
(4)	This option was granted on March 10, 2016 and had a four-year vesting schedule in which 25% vested on the first anniversary of the grant date and the remainder vested in equal monthly installments for 36 months thereafter, such that the stock option vested in full on the four-year anniversary of the grant date.

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