GLAUKOS Corp — Director's Dealing 2025

Dec 15, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: GLAUKOS Corp (GKOS)
CIK: 0001192448
Period of Report: 2025-12-11

Reporting Person: Burns Thomas William (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-12-11	Common Stock	A	4168	—	Acquired	154873	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-12-11	Stock Option (Right to Buy)	$55.18	A	8416	Acquired	2032-03-24	Common Stock (8416)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	893932	Indirect
Common Stock	238107	Indirect
Common Stock	120000	Indirect
Common Stock	100000	Indirect
Common Stock	100000	Indirect

Footnotes

F1: Represents shares of common stock underlying a portion of an award of restricted stock units 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 and 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 reported herein consists of the portion of the
award that was 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 in March 2026, and the remaining 50% will vest and be delivered in December 2026.

F2: Includes 91,705 restricted stock units that have not yet vested or been delivered to the Reporting Person.

F3: 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 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.

F4: 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.