Glaukos officer Navratil proposes $10.6M share sale

The notice lists Fidelity Brokerage Services LLC as broker and October 30, 2026, as the approximate sale date.

Available on EDGAR 10/30/2026 - 01:04 PM EDT Accepted by SEC EDGAR 10/30/2026 - 01:04 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

GLAUKOS Corp (GKOS) officer Tomas Navratil reported a proposed sale of 44,436 common shares, with an aggregate market value of $10,618,941.75. The notice lists Fidelity Brokerage Services LLC as broker and October 30, 2026, as the approximate sale date. It also lists four sales during the preceding three months: 13,744 shares on August 28, 2026, for $2,483,097.96; 1,457 shares on September 16, 2026, for $243,207.31; 1,615 shares on September 25, 2026, for $249,157.98; and 1,527 shares on October 5, 2026, for $251,121.33.

Key Figures

Proposed shares: 44,436 common shares Aggregate market value: $10,618,941.75 Shares outstanding: 59,196,870 shares +4 more

7 metrics

Proposed shares 44,436 common shares Proposed sale

Aggregate market value $10,618,941.75 Proposed sale

Shares outstanding 59,196,870 shares GLAUKOS Corp

Reported sale 13,744 shares; $2,483,097.96 August 28, 2026

Reported sale 1,457 shares; $243,207.31 September 16, 2026

Reported sale 1,615 shares; $249,157.98 September 25, 2026

Reported sale 1,527 shares; $251,121.33 October 5, 2026

Key Terms

Rule 144, Restricted Stock Vesting, Stock Option Exercise

3 terms

Rule 144 regulatory

"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

"Restricted Stock Vesting"

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.

Stock Option Exercise financial

"Stock Option Exercise"

A stock option exercise is the act of using a previously granted right to buy shares of a company's stock at a specific, predetermined price by paying that price and receiving the shares. It matters to investors because exercising changes who owns the shares (which can dilute existing ownership), can trigger taxable events and shift potential gains or losses, and affects voting power and the company’s outstanding share count—like turning a voucher into an actual product that becomes part of circulating supply.

FAQ

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

How many GKOS shares did Tomas Navratil propose to sell?

Tomas Navratil reported a proposed sale of 44,436 common shares, with an aggregate market value of $10,618,941.75. The notice lists October 30, 2026, as the approximate sale date.

What were Tomas Navratil's recent GKOS share sales?

The notice lists sales of 13,744 shares for $2,483,097.96 on August 28, 2026; 1,457 shares for $243,207.31 on September 16, 2026; 1,615 shares for $249,157.98 on September 25, 2026; and 1,527 shares for $251,121.33 on October 5, 2026.

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

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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	44436	10618941.75	59196870	10/30/2026	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	01/01/2023	Restricted Stock Vesting	Issuer			1896	01/01/2023	Compensation
Common	01/03/2023	Restricted Stock Vesting	Issuer			1682	01/03/2023	Compensation
Common	01/06/2023	Restricted Stock Vesting	Issuer			585	01/06/2023	Compensation
Common	01/11/2023	Restricted Stock Vesting	Issuer			35	01/11/2023	Compensation
Common	08/02/2023	Restricted Stock Vesting	Issuer			392	08/02/2023	Compensation
Common	03/13/2024	Restricted Stock Vesting	Issuer			481	03/13/2024	Compensation
Common	03/22/2024	Restricted Stock Vesting	Issuer			2057	03/22/2024	Compensation
Common	03/13/2025	Restricted Stock Vesting	Issuer			1861	03/13/2025	Compensation
Common	03/30/2025	Restricted Stock Vesting	Issuer			517	03/30/2025	Compensation
Common	04/01/2025	Restricted Stock Vesting	Issuer			491	04/01/2025	Compensation
Common	05/07/2025	Restricted Stock Vesting	Issuer			517	05/07/2025	Compensation
Common	05/25/2025	Restricted Stock Vesting	Issuer			491	05/25/2025	Compensation
Common	09/23/2025	Restricted Stock Vesting	Issuer			491	09/23/2025	Compensation
Common	12/30/2025	Restricted Stock Vesting	Issuer			517	12/30/2025	Compensation
Common	03/05/2026	Restricted Stock Vesting	Issuer			666	03/05/2026	Compensation
Common	03/14/2026	Restricted Stock Vesting	Issuer			1811	03/14/2026	Compensation
Common	03/22/2026	Restricted Stock Vesting	Issuer			3219	03/22/2026	Compensation
Common	03/24/2026	Restricted Stock Vesting	Issuer			2589	03/24/2026	Compensation
Common	03/25/2026	Restricted Stock Vesting	Issuer			8920	03/25/2026	Compensation
Common	06/25/2026	Restricted Stock Vesting	Issuer			491	06/25/2026	Compensation
Common	10/30/2026	Stock Option Exercise	Issuer			12969	10/30/2026	Cash
Common	03/14/2025	Restricted Stock Vesting	Issuer			1758	03/14/2025	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	08/28/2026	13744	2483097.96
Tomas Navratil 1 Glaukos Way Aliso Viejo CA 92656	Common	09/16/2026	1457	243207.31
Tomas Navratil 1 Glaukos Way Aliso Viejo CA 92656	Common	09/25/2026	1615	249157.98
Tomas Navratil 1 Glaukos Way Aliso Viejo CA 92656	Common	10/05/2026	1527	251121.33

144: Remarks and Signature

Remarks
Date of Notice	10/30/2026
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/ Emily Navaro, 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)