Glaukos Insider Filing: Performance RSUs Vest, Small Sale Reported

Rhea-AI Filing Summary

Tomas Navratil, Chief Development Officer and director of Glaukos Corporation (GKOS), reported two transactions in September 2025. On 09/18/2025 1,948 shares of common stock were recorded as acquired at no cash price; these shares represent a portion of a restricted stock unit award granted March 18, 2021 that vested after the company determined certain operational targets had been achieved. Fifty percent of those shares will be delivered on 09/23/2025 and the remaining 50% in June 2026. The filing notes withheld shares for tax obligations related to a March 24, 2022 award.

On 09/19/2025 the reporting person disposed of 510 shares at $83.47 per share. After these reported transactions, the filing reports 76,907 shares beneficially owned. The filing is a routine Section 16 Form 4 reflecting vesting and a small sale tied to tax withholding and personal disposition.

Positive

• Performance targets met triggering vesting of a portion of a multi-year performance-based RSU award
• Staggered delivery of vested shares (50% on 09/23/2025 and 50% in June 2026) supports executive retention

Negative

• Insider sale of 510 shares at $83.47 reported on 09/19/2025
• Significant unvested RSUs remain (44,537 and 43,509 in noted awards), indicating future dilution when they vest

Insights

Corporate Governance Expert

TL;DR: Routine insider vesting due to achieved operational targets and a small subsequent sale for tax or liquidity purposes; not material by itself.

The Form 4 documents the partial vesting of a long-dated restricted stock unit grant after the Compensation, Nominating & Governance Committee certified achievement of specific operational targets. Such committee determinations are common governance mechanisms to align pay with performance. The 1,948 shares reflect earned performance-based compensation, with staggered delivery dates, indicating ongoing retention incentives. The 510-share disposition at $83.47 appears to address tax withholding or personal liquidity given its small size relative to total holdings. No new derivative instruments or unusual arrangements are disclosed.

Securities/Compensation Analyst

TL;DR: The filing records earned RSUs delivering shares in two tranches and a minor sale; impact on ownership and incentives is modest.

The reported 1,948 shares resulted from a performance-based RSU grant from March 18, 2021 tied to multi-year operational targets; the committee deemed two targets achieved on 09/18/2025. Delivery is split between 09/23/2025 and June 2026, preserving retention value. The disclosure also identifies remaining unvested RSUs (44,537 and 43,509 in two noted awards). The 510-share sale executed at $83.47 is a completed open-market disposition. Overall, the transactions adjust but do not dramatically change insider alignment or outstanding equity structure based on disclosed figures.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Navratil Tomas

Role CHIEF DEVELOPMENT OFFICER

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	510	$83.47	$43K
Grant/Award	Common Stock	1,948	$0.00	--

Holdings After Transaction: Common Stock — 76,907 shares (Direct)

Footnotes (1)

1. Represents shares of common stock underlying a portion of an award of restricted stock units previously granted by the Issuer on March 18, 2021, the vesting of which was subject to the Issuer's achievement of certain pre-determined operational targets over a multi-year performance period. The Compensation, Nominating & Governance Committee of the Issuer's Board of Directors determined on September 18, 2025 that two of the operational targets had been achieved. The number of shares reported herein consists of the portion of the award that was deemed earned based upon the achievement of the operational targets. 50% of the number of shares of common stock reported herein will vest and be delivered on September 23, 2025 and the remaining 50% will vest and be delivered in June 2026. Includes 44,537 restricted stock units that have not yet vested or been delivered to the Reporting Person. 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 43,509 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^*

Navratil Tomas

(Last) (First) (Middle)

C/O GLAUKOS CORPORATION

ONE GLAUKOS WAY

(Street)

ALISO VIEJO CA 92656

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
GLAUKOS Corp [ GKOS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CHIEF DEVELOPMENT OFFICER

3. Date of Earliest Transaction (Month/Day/Year)
09/18/2025

4. If Amendment, Date of 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

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	09/18/2025		A		1,948(1)	A	$0	77,417(2)	D
Common Stock	09/19/2025		F		510(3)	D	$83.47	76,907(4)	D

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. Represents shares of common stock underlying a portion of an award of restricted stock units previously granted by the Issuer on March 18, 2021, the vesting of which was subject to the Issuer's achievement of certain pre-determined operational targets over a multi-year performance period. The Compensation, Nominating & Governance Committee of the Issuer's Board of Directors determined on September 18, 2025 that two of the operational targets had been achieved. The number of shares reported herein consists of the portion of the award that was deemed earned based upon the achievement of the operational targets. 50% of the number of shares of common stock reported herein will vest and be delivered on September 23, 2025 and the remaining 50% will vest and be delivered in June 2026.

2. Includes 44,537 restricted stock units that have not yet vested or been delivered to the Reporting Person.

3. 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.

4. Includes 43,509 restricted stock units that have not yet vested or been delivered to the Reporting Person.

	Diana Scherer, Attorney-in-Fact	09/22/2025
	** 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.

FAQ

Who filed the Form 4 for GKOS?

Tomas Navratil, Chief Development Officer and director of Glaukos Corporation, filed the Form 4.

What transactions were reported on the Form 4 for GKOS?

Acquisition: 1,948 shares deemed earned from a performance-based RSU award on 09/18/2025; Disposition: 510 shares sold on 09/19/2025 at $83.47 per share.

Why were the 1,948 shares recorded as acquired on 09/18/2025?

They represent the portion of an RSU award granted on March 18, 2021 that was earned after the company certified achievement of certain operational targets.

How many shares does the reporting person beneficially own after these transactions?

The filing reports 76,907 shares beneficially owned following the reported transactions.

Were any shares withheld for taxes upon vesting?

Yes. The filing notes shares were withheld to satisfy tax withholding obligations related to vested RSUs, including shares from a March 24, 2022 award.