Glaukos (GKOS) chief development officer sells 716 shares under 10b5-1 plan

Rhea-AI Filing Summary

Glaukos Corp chief development officer Tomas Navratil reported a small open-market sale of company stock. On July 1, he sold 716 shares of Glaukos common stock at an average price of $139.06 per share in an open-market transaction.

After the sale, Navratil directly holds 87,634 shares of Glaukos common stock, so the transaction represents a minor portion of his overall stake. The sale was carried out under a pre-arranged Rule 10b5-1 trading plan adopted on March 12, 2026, indicating it was scheduled in advance. His holdings also include 38,817 restricted stock units that have not yet vested or been delivered.

Insights

Equity compensation and insider-trading analyst

Routine, pre-planned insider sale of a small share block.

The chief development officer of Glaukos Corp, Tomas Navratil, executed an open-market sale of 716 common shares at $139.06 per share. Following this transaction, he still directly owns 87,634 shares, plus unvested restricted stock units.

The filing notes the trade was made under a Rule 10b5-1 trading plan adopted on March 12, 2026. Such plans pre-schedule trades, reducing the informational value of timing. The sale size is small relative to his stake, suggesting a routine liquidity event rather than a major position change.

Insider Trade Summary 10b5-1

Net Seller: 716 shares ($99,567)

Net Sell 1 txn

Insider Navratil Tomas

Role CHIEF DEVELOPMENT OFFICER

Sold 716 shs ($100K)

Type	Security	Shares	Price	Value
Sale	Common Stock	716	$139.06	$100K

Holdings After Transaction: Common Stock — 87,634 shares (Direct, null)

Footnotes (1)

1. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 12, 2026. Includes 38,817 restricted stock units that have not yet vested or been delivered to the Reporting Person.

Key Figures

Shares sold: 716 shares Sale price: $139.06 per share Shares owned after sale: 87,634 shares +2 more

5 metrics

Shares sold 716 shares Open-market sale on July 1, 2026

Sale price $139.06 per share Average price for the July 1, 2026 transaction

Shares owned after sale 87,634 shares Direct GLAUKOS common stock holdings following transaction

Unvested RSUs 38,817 units Restricted stock units not yet vested or delivered

Trading plan adoption date March 12, 2026 Rule 10b5-1 plan used for the reported sale

Key Terms

Rule 10b5-1 trading plan, restricted stock units, open-market sale, Form 4

4 terms

Rule 10b5-1 trading plan regulatory

"The sales were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 12, 2026."

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 or been delivered to the Reporting Person."

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.

open-market sale financial

"transaction_action is described as an open-market sale of common stock."

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Form 4 regulatory

"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan."

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/08/2026 - 08:54 PM Accepted by SEC EDGAR 07/08/2026 - 08:53 PM Learn about SEC filing dates

FAQ

What insider transaction did GLAUKOS Corp (GKOS) report for Tomas Navratil?

GLAUKOS Corp reported that chief development officer Tomas Navratil sold 716 shares of common stock. The shares were sold in an open-market transaction at an average price of $139.06 per share, according to the Form 4 insider filing.

How many GLAUKOS (GKOS) shares did Tomas Navratil retain after the sale?

After selling 716 shares, Tomas Navratil directly holds 87,634 shares of GLAUKOS common stock. This shows the sale is small compared with his remaining ownership, as he continues to maintain a substantial equity position in the company.

Was the GKOS insider sale by Tomas Navratil under a Rule 10b5-1 plan?

Yes. The Form 4 states the sales were effected under a Rule 10b5-1 trading plan adopted by Tomas Navratil on March 12, 2026. Such pre-arranged plans automate trades, reducing the significance of trade timing for interpreting insider sentiment.

What price did Tomas Navratil receive for his sold GLAUKOS (GKOS) shares?

Tomas Navratil sold 716 GLAUKOS common shares at an average price of $139.06 per share. This figure reflects the weighted average sale price reported in the Form 4 for the July 1, 2026 open-market transaction.

Does Tomas Navratil hold any unvested equity awards in GLAUKOS (GKOS)?

Yes. The Form 4 footnotes state his holdings include 38,817 restricted stock units that have not yet vested or been delivered. These unvested RSUs represent additional potential future share ownership beyond his current 87,634 directly held shares.

Is the GKOS insider transaction characterized as a buy or sell activity?

The reported insider activity is a sale. The Form 4 classifies the July 1, 2026 transaction with code “S” for an open-market sale, covering 716 shares of GLAUKOS common stock sold at an average price of $139.06 per share.

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)
07/01/2026

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	07/01/2026		S(1)		716	D	$139.06	87,634(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. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 12, 2026.

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

	Diana Scherer, Attorney-in-Fact	07/08/2026
	** 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)