Glaukos CDO sells 1,457 shares in preset plan

Q: What insider transaction did GLAUKOS Corp (GKOS) disclose in this Form 4?

GLAUKOS Corp disclosed that Chief Development Officer Tomas Navratil sold 1,457 shares of GKOS common stock on September 16, 2026 in multiple open‑market transactions. The sales were reported as routine Form 4 insider transactions.

Q: How many separate sale transactions did the GKOS Chief Development Officer report?

The Chief Development Officer reported seven separate non‑derivative sale transactions of GKOS common stock on September 16, 2026, all coded as open‑market or private sales in the Form 4.

Glaukos’ Chief Development Officer sold 1,457 GKOS shares under a pre‑arranged Rule 10b5‑1 trading plan at prices in the mid‑$160s to low‑$170s.

Available on EDGAR 09/18/2026 - 05:32 PM EDT Accepted by SEC EDGAR 09/18/2026 - 05:32 PM EDT

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Rhea-AI Filing Summary

GLAUKOS Corp (GKOS) reported that its Chief Development Officer, Tomas Navratil, sold a total of 1,457 shares of common stock on September 16, 2026 in a series of open‑market transactions under a Rule 10b5-1 trading plan adopted on June 12, 2026.

The weighted‑average sale prices for the trades ranged from about $163.20 to $172.00 per share, and the officer’s holdings include 38,817 restricted stock units that have not yet vested or been delivered.

Insider Trade Summary 10b5-1

Net Seller: 1,457 shares

Net Sell 7 txns

Insider Navratil Tomas

Role CHIEF DEVELOPMENT OFFICER

Sold 1,457 shs ($243K)

Type	Security	Shares	Price	Value
Sale	Common Stock ^{F1, F2, F3}	103	$163.20	$17K
Sale	Common Stock ^{F1, F4, F3}	345	$164.60	$57K
Sale	Common Stock ^{F1, F5, F3}	191	$166.20	$32K
Sale	Common Stock ^{F1, F6, F3}	460	$167.32	$77K
Sale	Common Stock ^{F1, F7, F3}	120	$168.38	$20K
Sale	Common Stock ^{F1, F8, F3}	234	$170.95	$40K
Sale	Common Stock ^{F1, F9, F3}	4	$172.00	$688.00

Holdings After Transaction: Common Stock — 72,433 shares (Direct)

Footnotes (9)

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.
F2. This transaction was executed in multiple trades at prices ranging from $162.87 to $163.47. 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.
F3. Includes 38,817 restricted stock units that have not yet vested or been delivered to the Reporting Person.
F4. This transaction was executed in multiple trades at prices ranging from $164.40 to $165.26. 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.
F5. This transaction was executed in multiple trades at prices ranging from $165.55 to $166.22. 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.
F6. This transaction was executed in multiple trades at prices ranging from $167.04 to $167.57. 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.
F7. This transaction was executed in multiple trades at prices ranging from $168.37 to $168.38. 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.
F8. This transaction was executed in multiple trades at prices ranging from $170.76 to $171.10. 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.
F9. This transaction was executed in multiple trades at prices ranging from $172.00 to $172.01. 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: 1,457 shares Lowest reported weighted-average sale price: $163.20 per share Highest reported weighted-average sale price: $172.00 per share +3 more

6 metrics

Shares sold 1,457 shares Total common shares sold by the Chief Development Officer on September 16, 2026

Lowest reported weighted-average sale price $163.20 per share One of the September 16, 2026 sale tranches

Highest reported weighted-average sale price $172.00 per share One of the September 16, 2026 sale tranches

Number of sale transactions 7 transactions Non-derivative sales of common stock reported for September 16, 2026

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

Rule 10b5-1 plan adoption date June 12, 2026 Date the trading plan governing these sales was adopted

Key Terms

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

3 terms

Rule 10b5-1 trading plan regulatory

"The sales reported ... were 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.

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.

FAQ

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

What insider transaction did GLAUKOS Corp (GKOS) disclose in this Form 4?

GLAUKOS Corp disclosed that Chief Development Officer Tomas Navratil sold 1,457 shares of GKOS common stock on September 16, 2026 in multiple open‑market transactions. The sales were reported as routine Form 4 insider transactions.

At what prices were the 1,457 GKOS shares sold by the Chief Development Officer?

The 1,457 GKOS shares were sold in several trades with weighted‑average prices ranging from about $163.20 to $172.00 per share. Each trade was executed in multiple lots within specific price ranges disclosed in the Form 4 footnotes.

Were the recent GKOS insider sales made under a Rule 10b5-1 trading plan?

Yes. The filing states the sales were effected pursuant to a Rule 10b5-1 trading plan adopted by Tomas Navratil on June 12, 2026, indicating the trades were pre‑scheduled rather than opportunistic.

How many restricted stock units does the reporting person have in GLAUKOS Corp (GKOS)?

The filing states that the reporting person’s position includes 38,817 restricted stock units of GKOS that have not yet vested or been delivered. These RSUs represent additional potential shares, separate from currently held common stock.

How many separate sale transactions did the GKOS Chief Development Officer report?

The Chief Development Officer reported seven separate non‑derivative sale transactions of GKOS common stock on September 16, 2026, all coded as open‑market or private sales in the Form 4.

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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)
09/16/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	09/16/2026		S⁽¹⁾		103	D	$163.2⁽²⁾	73,787⁽³⁾	D
Common Stock	09/16/2026		S⁽¹⁾		345	D	$164.6⁽⁴⁾	73,442⁽³⁾	D
Common Stock	09/16/2026		S⁽¹⁾		191	D	$166.2⁽⁵⁾	73,251⁽³⁾	D
Common Stock	09/16/2026		S⁽¹⁾		460	D	$167.32⁽⁶⁾	72,791⁽³⁾	D
Common Stock	09/16/2026		S⁽¹⁾		120	D	$168.38⁽⁷⁾	72,671⁽³⁾	D
Common Stock	09/16/2026		S⁽¹⁾		234	D	$170.95⁽⁸⁾	72,437⁽³⁾	D
Common Stock	09/16/2026		S⁽¹⁾		4	D	$172⁽⁹⁾	72,433⁽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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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 $162.87 to $163.47. 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.

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 $165.26. 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 $165.55 to $166.22. 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.

6. This transaction was executed in multiple trades at prices ranging from $167.04 to $167.57. 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.

7. This transaction was executed in multiple trades at prices ranging from $168.37 to $168.38. 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.

8. This transaction was executed in multiple trades at prices ranging from $170.76 to $171.10. 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.

9. This transaction was executed in multiple trades at prices ranging from $172.00 to $172.01. 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	09/18/2026
	** 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)

Source: View Original Filing on SEC EDGAR