Glaukos CFO sells 625 shares in planned trade

GLAUKOS Corp senior vice president and chief financial officer Alex R. Thurman reported two recent stock transactions.

Rhea-AI Filing Summary

GLAUKOS Corp senior vice president and chief financial officer Alex R. Thurman reported two recent stock transactions. On March 17, 2026, he executed an open‑market sale of 625 shares of common stock at $99.15 per share. On March 16, 2026, 614 shares were disposed of to cover tax withholding obligations tied to vesting of restricted stock units granted on March 14, 2024, which is a non‑market event. After these transactions, he directly held 49,249 shares of common stock, including 12,512 restricted stock units that have not yet vested or been delivered and 167 stock units acquired through the employee stock purchase plan. The sale was carried out under a pre‑arranged Rule 10b5‑1 trading plan adopted on December 15, 2025, indicating it was scheduled in advance.

Insider Trade Summary 10b5-1

Net Seller: 625 shares

Net Sell 2 txns

Insider Thurman Alex R.

Role SVP & CHIEF FINANCIAL OFFICER

Sold 625 shs ($62K)

Type	Security	Shares	Price	Value
Sale	Common Stock	625	$99.15	$62K
Exercise Price or Tax Liability	Common Stock	614	$98.94	$61K

Holdings After Transaction: Common Stock — 49,249 shares (Direct)

Footnotes (3)

1. F1. 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 14, 2024.
2. F2. Includes 12,512 restricted stock units that have not yet vested or been delivered to the Reporting Person and 167 stock units purchased by the Reporting Person through the Issuer's Employee Stock Purchase Plan
3. F3. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2025.

FAQ

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What did GLAUKOS (GKOS) CFO Alex R. Thurman report in this Form 4?

GLAUKOS CFO Alex R. Thurman reported an open‑market sale and a tax‑related share disposition. He sold 625 common shares and had 614 shares withheld to satisfy tax obligations tied to restricted stock unit vesting from a March 14, 2024 grant.

How many GLAUKOS (GKOS) shares did the CFO sell and at what price?

Alex R. Thurman sold 625 shares of GLAUKOS common stock in an open‑market transaction at a price of $99.15 per share. This sale occurred on March 17, 2026 and was executed under a pre‑arranged Rule 10b5‑1 trading plan.

What is the 614-share transaction disclosed by GLAUKOS (GKOS) CFO in this filing?

The 614-share transaction represents shares withheld to cover Alex R. Thurman’s tax obligations when restricted stock units vested. These shares were not sold in the open market but delivered to the issuer as payment related to a March 14, 2024 RSU grant.

How many GLAUKOS (GKOS) shares does the CFO hold after these transactions?

After the reported transactions, Alex R. Thurman directly holds 49,249 shares of GLAUKOS common stock. This figure includes 12,512 unvested restricted stock units and 167 stock units accumulated through the company’s Employee Stock Purchase Plan, reflecting a substantial remaining equity position.

Was the GLAUKOS (GKOS) CFO’s share sale made under a Rule 10b5-1 plan?

Yes. The filing states the sales were effected under a Rule 10b5‑1 trading plan adopted by Alex R. Thurman on December 15, 2025. Such plans pre‑schedule trades, indicating the timing was arranged in advance rather than a spontaneous market decision.

What types of GLAUKOS (GKOS) equity awards does the CFO still hold?

Alex R. Thurman continues to hold 12,512 restricted stock units that have not yet vested or been delivered, along with 167 stock units purchased through the Employee Stock Purchase Plan. These positions are in addition to his other directly held GLAUKOS common shares after the transactions.

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Accepted by SEC EDGAR 03/19/2026 - 04:10 PM Learn about SEC filing dates

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).

X

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^*

Thurman Alex R.

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP & CHIEF FINANCIAL OFFICER

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/16/2026

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	03/16/2026		F		614(1)	D	$98.94	49,874(2)	D
Common Stock	03/17/2026		S(3)		625	D	$99.15	49,249(2)	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. 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 14, 2024.

2. Includes 12,512 restricted stock units that have not yet vested or been delivered to the Reporting Person and 167 stock units purchased by the Reporting Person through the Issuer's Employee Stock Purchase Plan

3. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2025.

	Diana Scherer, Attorney-in-Fact	03/19/2026
	** 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)