Glaukos officer plans $2.5M company share sale

GLAUKOS Corp (GKOS) insider Tomas Navratil, identified as an officer, filed a notice of proposed sale of 13,744 shares of common stock under Rule 144 through Fidelity Brokerage Services LLC.

Rhea-AI Filing Summary

GLAUKOS Corp (GKOS) insider Tomas Navratil, identified as an officer, filed a notice of proposed sale of 13,744 shares of common stock under Rule 144 through Fidelity Brokerage Services LLC. The shares have an aggregate market value of $2,483,097.96. Common shares outstanding were 58,983,937 as of August 28, 2026.

Key Figures

Shares proposed to be sold: 13,744 shares Aggregate market value of shares to be sold: $2,483,097.96 Shares outstanding: 58,983,937 shares +4 more

7 metrics

Shares proposed to be sold 13,744 shares Common stock under Rule 144 through Fidelity Brokerage Services LLC

Aggregate market value of shares to be sold $2,483,097.96 Proposed Rule 144 sale of 13,744 GLAUKOS Corp common shares

Shares outstanding 58,983,937 shares GLAUKOS Corp common shares outstanding as referenced in the Form 144

Shares sold on June 16, 2026 1,537 shares Common stock sale by Tomas Navratil during past three months

Proceeds from June 16, 2026 sale $200,855.16 Sale of 1,537 GLAUKOS Corp common shares

Shares sold on July 1, 2026 716 shares Common stock sale by Tomas Navratil during past three months

Proceeds from July 1, 2026 sale $99,566.96 Sale of 716 GLAUKOS Corp common shares

Key Terms

Rule 144, Restricted Stock Vesting, attorney-in-fact

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Vesting financial

"Common | 01/01/2022 | Restricted Stock Vesting | Issuer"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

attorney-in-fact regulatory

"as attorney-in-fact for Tomas Navratil"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

FAQ

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

What does the Form 144 filing disclose for GLAUKOS Corp (GKOS)?

It discloses that officer Tomas Navratil has filed notice to sell 13,744 shares of GLAUKOS Corp common stock under Rule 144 through Fidelity Brokerage Services LLC, with an aggregate market value of $2,483,097.96.

How many GLAUKOS Corp (GKOS) shares are proposed to be sold under this Form 144?

The filing lists 13,744 shares of GLAUKOS Corp common stock proposed to be sold, with an aggregate market value of $2,483,097.96, to be sold on the NYSE through Fidelity Brokerage Services LLC.

How many GLAUKOS Corp (GKOS) shares were sold by Tomas Navratil in the past three months?

The filing reports sales of 1,537 shares on June 16, 2026 for $200,855.16 and 716 shares on July 1, 2026 for $99,566.96 of GLAUKOS Corp common stock.

What is the reported number of GLAUKOS Corp (GKOS) shares outstanding?

The notice states that GLAUKOS Corp had 58,983,937 common shares outstanding, with the figure tied to the Form 144 securities information as of August 28, 2026.

What is the source of the GLAUKOS Corp (GKOS) shares to be sold?

The shares listed arise from Restricted Stock Vesting granted by the issuer as compensation, with multiple vesting dates between 2022 and 2026 shown in the acquisition history section.

Who is executing the sale for Tomas Navratil in the GLAUKOS Corp (GKOS) Form 144?

The filing identifies Fidelity Brokerage Services LLC as the broker for the proposed sale, and it is signed by Daniel Tucci as a duly authorized representative and attorney-in-fact for Tomas Navratil.

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

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Available on EDGAR 08/28/2026 - 01:42 PM EDT Accepted by SEC EDGAR 08/28/2026 - 01:41 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001920053
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	GLAUKOS Corp
SEC File Number	001-37463
Address of Issuer	1 GLAUKOS WAY ALISO VIEJO CALIFORNIA 92656
Phone	949-367-9600
Name of Person for Whose Account the Securities are To Be Sold	Navratil Tomas
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	13744	2483097.96	58983937	08/28/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	01/01/2022	Restricted Stock Vesting	Issuer			1895	01/01/2022	Compensation
Common	04/01/2022	Restricted Stock Vesting	Issuer			637	04/01/2022	Compensation
Common	04/06/2022	Restricted Stock Vesting	Issuer			637	04/06/2022	Compensation
Common	11/02/2022	Restricted Stock Vesting	Issuer			637	11/02/2022	Compensation
Common	01/11/2023	Restricted Stock Vesting	Issuer			636	01/11/2023	Compensation
Common	02/11/2023	Restricted Stock Vesting	Issuer			671	02/11/2023	Compensation
Common	03/01/2023	Restricted Stock Vesting	Issuer			336	03/01/2023	Compensation
Common	03/24/2023	Restricted Stock Vesting	Issuer			3358	03/24/2023	Compensation
Common	04/01/2023	Restricted Stock Vesting	Issuer			637	04/01/2023	Compensation
Common	04/10/2023	Restricted Stock Vesting	Issuer			839	04/10/2023	Compensation
Common	04/20/2023	Restricted Stock Vesting	Issuer			335	04/20/2023	Compensation
Common	10/17/2023	Restricted Stock Vesting	Issuer			517	10/17/2023	Compensation
Common	02/24/2026	Restricted Stock Vesting	Issuer			578	02/24/2026	Compensation
Common	03/13/2026	Restricted Stock Vesting	Issuer			2031	03/13/2026	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Tomas Navratil 1 Glaukos Way Aliso Viejo CA 92656	Common	06/16/2026	1537	200855.16
Tomas Navratil 1 Glaukos Way Aliso Viejo CA 92656	Common	07/01/2026	716	99566.96

144: Remarks and Signature

Remarks
Date of Notice	08/28/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Tomas Navratil
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)