| 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 |
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| 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*
(Street)
(Country) | 2. Issuer Name and Ticker or Trading Symbol
GLAUKOS Corp [ GKOS ] | 5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
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| 2a. Foreign Trading Symbol
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| 3. Date of Earliest Transaction
(Month/Day/Year) 03/25/2026 | 6. Individual or Joint/Group Filing (Check Applicable Line)
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| 4. If Amendment, Date of Original Filed
(Month/Day/Year) |
| Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned | ||||||||||
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| 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 | 03/25/2026 | A | 5,829(1) | A | $0 | 78,369(2) | D | |||
| Common Stock | 03/25/2026 | A | 17,792(3) | A | $0 | 96,161(4) | D | |||
| Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities) | |||||||||||||||
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| 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 | ||||||||
| Stock Option (Right to Buy) | $55.18 | 03/25/2026 | A | 16,462(5) | (6) | 03/24/2032 | Common Stock | 16,462 | $0 | 71,475 | D | ||||
| Stock Option (Right to Buy) | $55.18 | 03/25/2026 | A | 21,955(7) | 03/25/2026 | 03/24/2032 | Common Stock | 21,955 | $0 | 52,668 | D | ||||
| Stock Option (Right to Buy) | $48.46 | 03/25/2026 | A | 36,751(8) | 03/25/2026 | 03/14/2033 | Common Stock | 36,751 | $0 | 36,751 | D | ||||
| 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 14, 2024, 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 on March 25, 2026 that certain 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 target. 100% of the number of shares of common stock reported herein will vest and be delivered in March 2026. |
| 2. Includes 31,962 restricted stock units that have not yet vested or been delivered to the Reporting Person. |
| 3. Granted by the Issuer in the form of restricted stock units which vest over a four-year period, with 25% to vest on each anniversary of the grant date |
| 4. Includes 49,754 restricted stock units that have not yet vested or been delivered to the Reporting Person. |
| 5. 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 Committee determined on December 15, 2022 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. |
| 6. 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. |
| 7. Represents a portion of an option to purchase shares of common stock previously granted by the Issuer to the Reporting Person on March 24, 2022 in connection with his promotion to President and Chief Operating Officer, the vesting of which was subject to the Issuer's achievement of certain multi-year performance goals. The Compensation, Nominating & Governance Committee determined on March 25, 2026 the level of achievement for the fourth year of the multi-year performance period. The number of shares of common stock subject to the stock option reported herein consists of the portion of the shares subject to the stock option that vested with respect to 100% of the fourth-year performance goal. |
| 8. Represents shares of common stock underlying a portion of an award of restricted stock units previously granted by the Issuer on March 22, 2023, 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 on March 25, 2026 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. |
| Diana Scherer, Attorney-in-Fact | 03/27/2026 | |
| ** 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) | ||