Glaukos (GKOS) CEO uses 2,744 shares to cover equity tax withholding

Rhea-AI Filing Summary

Glaukos Corp Chairman and CEO Thomas William Burns reported a tax-withholding share disposition related to equity compensation. On the vesting of previously granted restricted stock units, 2,744 shares of common stock were withheld by the company at $105.23 per share to cover his tax obligations. After this non-market transaction, he directly holds 239,707 common shares and also reports indirect ownership through several Burns family trusts. The filing also notes 59,399 restricted stock units that remain unvested and undelivered.

Insider Trade Summary

6 transactions reported

Mixed 6 txns

Insider Burns Thomas William

Role CHAIRMAN & CEO

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	2,744	$105.23	$289K
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 239,707 shares (Direct); Common Stock — 961,285 shares (Indirect, Through the Burns Family Trust)

Footnotes (1)

1. Consists of shares withheld by the Issuer with respect to tax withholding obligations of the Reporting Person upon vesting and delivery of shares of common stock underlying restricted stock units previously granted by the Issuer on March 24, 2022. Includes 59,399 restricted stock units that have not yet vested or been delivered to the Reporting Person.

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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 for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Burns Thomas William

(Last) (First) (Middle)

C/O GLAUKOS CORPORATION

ONE GLAUKOS WAY

(Street)

ALISO VIEJO CALIFORNIA 92656

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/24/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	03/24/2026		F		2,744(1)	D	$105.23	239,707(2)	D
Common Stock								961,285	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

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 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: 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

Explanation of Responses:

1. Consists of shares withheld by the Issuer with respect to tax withholding obligations of the Reporting Person upon vesting and delivery of shares of common stock underlying restricted stock units previously granted by the Issuer on March 24, 2022.

2. Includes 59,399 restricted stock units that have not yet vested or been delivered to the Reporting Person.

	Diana Scherer, Attorney-in-Fact	03/25/2026
	** 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What did Glaukos (GKOS) CEO Thomas Burns report in this Form 4?

Thomas Burns reported a tax-withholding disposition of 2,744 Glaukos common shares. These shares were withheld by the company upon RSU vesting to cover his tax obligations, rather than being sold in the open market.

How many Glaukos shares were used to cover Thomas Burns’s taxes?

A total of 2,744 Glaukos common shares were withheld at $105.23 per share. This occurred when restricted stock units granted on March 24, 2022 vested, satisfying Burns’s tax withholding obligations tied to that equity award.

How many Glaukos shares does Thomas Burns hold directly after this filing?

Following the tax-withholding transaction, Thomas Burns directly holds 239,707 Glaukos common shares. This direct position excludes additional indirect holdings reported through several family-related trusts and also excludes unvested restricted stock units noted in the filing.

What indirect Glaukos share holdings are reported for Thomas Burns?

The filing lists indirect ownership through multiple entities, including the Burns Family Trust, Burns Annuity Trust, Burns Charitable Remainder Trust, the Thomas W. Burns Irrevocable Trust, and the Janet M. Burns Irrevocable Trust, each holding specified amounts of Glaukos common stock on his behalf.

Does Thomas Burns still have unvested Glaukos restricted stock units outstanding?

Yes. The filing states that his reported holdings include 59,399 restricted stock units that have not yet vested or been delivered. These RSUs may convert into additional Glaukos common shares in the future as they vest under their original grant terms.

Was the Glaukos CEO’s Form 4 transaction an open-market sale of shares?

No. The transaction used code F and was for tax withholding. Shares were withheld by Glaukos to satisfy Thomas Burns’s tax obligations on vested restricted stock units, rather than sold on an exchange to outside buyers.