Glaukos development chief sells shares in three sales

GLAUKOS Corp Chief Development Officer Tomas Navratil reported three direct sales of common stock on October 5, 2026: 888 shares at a weighted-average $163.93 per share, 327 at $164.78, and 312 at $165.60.

Rhea-AI Filing Summary

GLAUKOS Corp Chief Development Officer Tomas Navratil reported three direct sales of common stock on October 5, 2026: 888 shares at a weighted-average $163.93 per share, 327 at $164.78, and 312 at $165.60. The sales were made under a Rule 10b5-1 trading plan adopted June 12, 2026.

Insider Trade Summary 10b5-1

Net Seller: 1,527 shares

Net Sell 3 txns

Insider Navratil Tomas

Role CHIEF DEVELOPMENT OFFICER

Sold 1,527 shs ($251K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2, F3	888	$163.93	$146K
Sale	Common Stock F1, F4, F3	327	$164.78	$54K
Sale	Common Stock F1, F5, F3	312	$165.60	$52K

Holdings After Transaction: Common Stock — 69,291 shares (Direct)

Footnotes (5)

1. F1. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 12, 2026.
2. F2. This transaction was executed in multiple trades at prices ranging from $163.37 to $164.36. The price reported above reflects the weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
3. F3. Includes 38,817 restricted stock units that have not yet vested or been delivered to the Reporting Person.
4. F4. This transaction was executed in multiple trades at prices ranging from $164.40 to $165.29. The price reported above reflects the weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
5. F5. This transaction was executed in multiple trades at prices ranging from $165.43 to $165.90. The price reported above reflects the weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

Key Figures

Shares sold: 888 shares Weighted-average sale price: $163.93 per share Shares sold: 327 shares +3 more

6 metrics

Shares sold 888 shares Sale on October 5, 2026; reported weighted-average price $163.93 per share

Weighted-average sale price $163.93 per share 888 shares sold on October 5, 2026

Shares sold 327 shares Sale on October 5, 2026; reported weighted-average price $164.78 per share

Weighted-average sale price $164.78 per share 327 shares sold on October 5, 2026

Shares sold 312 shares Sale on October 5, 2026; reported weighted-average price $165.60 per share

Weighted-average sale price $165.60 per share 312 shares sold on October 5, 2026

Key Terms

Rule 10b5-1 trading plan, weighted average price, restricted stock units

3 terms

Rule 10b5-1 trading plan regulatory

"effected pursuant to a Rule 10b5-1 trading plan"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

weighted average price financial

"The price reported above reflects the weighted average price"

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

restricted stock units financial

"Includes restricted stock units that have not yet vested or been delivered"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many GKOS shares did Tomas Navratil sell, and at what reported prices?

Tomas Navratil sold 888 shares at a reported weighted-average price of $163.93 per share, 327 shares at $164.78, and 312 shares at $165.60, all on October 5, 2026. Each reported price reflects a weighted average.

What were the trading ranges for Tomas Navratil's GKOS sales?

All three sales were executed in multiple trades: the 888-share sale ranged from $163.37 to $164.36, the 327-share sale from $164.40 to $165.29, and the 312-share sale from $165.43 to $165.90. The reported prices are weighted averages.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/07/2026 - 07:08 PM Accepted by SEC EDGAR 10/07/2026 - 07:07 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^*

Navratil Tomas

(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)
	CHIEF DEVELOPMENT OFFICER

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/05/2026

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	10/05/2026		S(1)		888	D	$163.93(2)	69,930(3)	D
Common Stock	10/05/2026		S(1)		327	D	$164.78(4)	69,603(3)	D
Common Stock	10/05/2026		S(1)		312	D	$165.6(5)	69,291(3)	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. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 12, 2026.

2. This transaction was executed in multiple trades at prices ranging from $163.37 to $164.36. The price reported above reflects the weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

3. Includes 38,817 restricted stock units that have not yet vested or been delivered to the Reporting Person.

4. This transaction was executed in multiple trades at prices ranging from $164.40 to $165.29. The price reported above reflects the weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

5. This transaction was executed in multiple trades at prices ranging from $165.43 to $165.90. The price reported above reflects the weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

	Diana Scherer, Attorney-in-Fact	10/07/2026
	** 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)