Glaukos CDO sells 13,744 shares around $180

GLAUKOS Corp (GKOS) reported that chief development officer Tomas Navratil sold a total of 13,744 shares of common stock on August 28, 2026, in three open-market transactions.

Rhea-AI Filing Summary

GLAUKOS Corp (GKOS) reported that chief development officer Tomas Navratil sold a total of 13,744 shares of common stock on August 28, 2026, in three open-market transactions. The sales covered 7,643 shares at a weighted average price of $180.25 (with individual trades between $179.69 and $180.69), 6,091 shares at a weighted average price of $181.19 (with trades between $180.71 and $181.61), and 10 shares at $182.50. The prices reported are weighted averages, and detailed trade breakdowns are available upon request. Following these transactions, Navratil’s equity holdings include 38,817 restricted stock units that have not yet vested or been delivered.

Insider Trade Summary

Net Seller: 13,744 shares

Net Sell 3 txns

Insider Navratil Tomas

Role CHIEF DEVELOPMENT OFFICER

Sold 13,744 shs ($2.48M)

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2	7,643	$180.25	$1.38M
Sale	Common Stock F3, F2	6,091	$181.19	$1.10M
Sale	Common Stock F2	10	$182.50	$2K

Holdings After Transaction: Common Stock — 73,890 shares (Direct)

Footnotes (3)

1. F1. This transaction was executed in multiple trades at prices ranging from $179.69 to $180.69. 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.
2. F2. Includes 38,817 restricted stock units that have not yet vested or been delivered to the Reporting Person.
3. F3. This transaction was executed in multiple trades at prices ranging from $180.71 to $181.61. 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

Total shares sold: 13,744 shares First block sold: 7,643 shares at $180.25 per share Second block sold: 6,091 shares at $181.19 per share +2 more

5 metrics

Total shares sold 13,744 shares Total GKOS common shares sold by Tomas Navratil on August 28, 2026

First block sold 7,643 shares at $180.25 per share Weighted average price, trades ranged from $179.69 to $180.69

Second block sold 6,091 shares at $181.19 per share Weighted average price, trades ranged from $180.71 to $181.61

Third block sold 10 shares at $182.50 per share Single reported trade on August 28, 2026

Unvested restricted stock units 38,817 restricted stock units Equity awards that have not yet vested or been delivered to the reporting person

Key Terms

restricted stock units, weighted average price, open market or private transaction

3 terms

restricted stock units financial

"Includes 38,817 restricted stock units that have not yet vested..."

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.

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.

open market or private transaction financial

"Sale in open market or private transaction"

FAQ

What insider transaction did GKOS report for Tomas Navratil?

GKOS reported that chief development officer Tomas Navratil sold a total of 13,744 shares of common stock on August 28, 2026 in three open-market transactions at weighted average prices around $180–$182 per share.

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

Tomas Navratil sold 13,744 GKOS shares: 7,643 shares at a weighted average of $180.25 (range $179.69–$180.69), 6,091 shares at $181.19 (range $180.71–$181.61), and 10 shares at $182.50.

When did the reported GKOS insider sales by Tomas Navratil occur?

All reported insider sales by Tomas Navratil occurred on August 28, 2026, in three separate open-market transactions involving a combined total of 13,744 GKOS shares of common stock.

Does Tomas Navratil still hold equity in GLAUKOS Corp (GKOS) after these sales?

Yes. After the reported sales, Tomas Navratil’s equity holdings include 38,817 restricted stock units that have not yet vested or been delivered to him, in addition to any other holdings not detailed in this data.

Were the GKOS insider sales executed in multiple trades?

Yes. The first block of 7,643 shares was executed in trades between $179.69 and $180.69, and the second block of 6,091 shares between $180.71 and $181.61. The prices reported are weighted average prices for those multiple trades.

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

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Available on EDGAR 09/01/2026 - 06:24 PM Accepted by SEC EDGAR 09/01/2026 - 06:24 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).

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)
08/28/2026

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	08/28/2026		S		7,643	D	$180.25(1)	79,991(2)	D
Common Stock	08/28/2026		S		6,091	D	$181.19(3)	73,900(2)	D
Common Stock	08/28/2026		S		10	D	$182.5	73,890(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. This transaction was executed in multiple trades at prices ranging from $179.69 to $180.69. 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.

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

3. This transaction was executed in multiple trades at prices ranging from $180.71 to $181.61. 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	09/01/2026
	** 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)