Joseph E. Gilliam - 11 Dec 2025 Form 4 Insider Report for GLAUKOS Corp (GKOS)

Role: PRESIDENT & COO
Signature: Diana Scherer, Attorney-in-Fact
Issuer symbol: GKOS
Transactions as of: 11 Dec 2025
Net transactions value: $0
Form type: 4
Filing time: 15 Dec 2025, 17:52:21 UTC
Previous filing: 20 Nov 2025
Next filing: 23 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Gilliam Joseph E	PRESIDENT & COO	C/O GLAUKOS CORPORATION, ONE GLAUKOS WAY, ALISO VIEJO	Diana Scherer, Attorney-in-Fact	15 Dec 2025	0001705850

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	GKOS	Stock Option (Right to Buy)	Award	$0	+7,316	+13%	$0.000000	65,013	11 Dec 2025	Common Stock	7,316	$55.18	Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents a portion of an option to purchase shares of common stock previously granted by the Issuer on March 24, 2022, 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 that certain of the operational targets had been achieved. The number of shares of common stock subject to the stock option as reported herein consists of the portion of the award that was earned based upon the achievement of the operational targets.
F2	50% of the portion of the option reported herein will vest and become exercisable in March 2026. 50% of the portion of the option reported herein will vest and become exercisable in December 2026.

Content

Represents a portion of an option to purchase shares of common stock previously granted by the Issuer on March 24, 2022, 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 that certain of the operational targets had been achieved. The number of shares of common stock subject to the stock option as reported herein consists of the portion of the award that was earned based upon the achievement of the operational targets.

50% of the portion of the option reported herein will vest and become exercisable in March 2026. 50% of the portion of the option reported herein will vest and become exercisable in December 2026.