Glaukos (GKOS) Rule 144: Fidelity lists 10,000‑share resale, insider trades

Rhea-AI Filing Summary

Glaukos Corp. notice of proposed resale of 10,000 shares of Common Stock by Fidelity Brokerage Services LLC under Rule 144. The filing lists recent open‑market dispositions by Alex R. Thurman totaling 4,657 shares across March 17, 24 and 25, 2026, with cash proceeds reported for each trade.

Key Figures

Registered/resale amount: 10,000 shares Sale - 625 shares: 625 shares Sale - 1,521 shares: 1,521 shares +2 more

5 metrics

Registered/resale amount 10,000 shares resale notice by Fidelity Brokerage Services LLC dated 04/30/2026

Sale - 625 shares 625 shares sale by Alex R. Thurman on 03/17/2026 for $61,968.75

Sale - 1,521 shares 1,521 shares sale by Alex R. Thurman on 03/24/2026 for $160,070.04

Sale - 2,511 shares 2,511 shares sale by Alex R. Thurman on 03/25/2026 for $267,321.06

Numeric field in header 58,733,911 numeric value appearing in filing header (04/30/2026 entry)

Key Terms

Rule 144, Options Granted, Cash consideration

3 terms

Rule 144 regulatory

"Securities To Be Sold | Common | 04/30/2026 | Options Granted - 10/06/2016"

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.

Options Granted financial

"Options Granted - 10/06/2016 | Issuer | 10000 | 04/30/2026 | Cash"

Cash consideration financial

"10000 | 04/30/2026 | Cash"

Cash consideration is the actual money paid to buy a company, asset, or stake rather than payment in shares or other forms. For investors it matters because cash payments deliver immediate, certain value and affect the buyer’s and seller’s cash reserves and balance sheets—like selling a car for cash versus taking a trade-in, one side gets instant spending power while the other changes its liquidity and risk profile.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	10000	1400000.00	58733911	04/30/2026	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	04/30/2026	Options Granted - 10/06/2016	Issuer			10000	04/30/2026	Cash

* 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
Alex R. Thurman 1 Glaukos Way Aliso Viejo CA 92656	Common	03/17/2026	625	61968.75
Alex R. Thurman 1 Glaukos Way Aliso Viejo CA 92656	Common	03/24/2026	1521	160070.04
Alex R. Thurman 1 Glaukos Way Aliso Viejo CA 92656	Common	03/25/2026	2511	267321.06

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the GKOS Form 144 filing report?

The filing reports a proposed resale of 10,000 shares of common stock by Fidelity Brokerage Services LLC under Rule 144. It also lists three recent sales by Alex R. Thurman in March 2026 with proceeds shown.

Who is listed as the selling broker in the GKOS Form 144?

The selling broker is Fidelity Brokerage Services LLC at 900 Salem Street, Smithfield, RI. The broker is shown in connection with the 10,000 shares resale notice dated 04/30/2026.

What recent sales by Alex R. Thurman are shown in the filing?

The filing lists three dispositions by Alex R. Thurman: 625 shares (proceeds $61,968.75), 1,521 shares (proceeds $160,070.04), and 2,511 shares (proceeds $267,321.06), dated March 17, 24 and 25, 2026 respectively.

Does the Form 144 state the sale method or consideration?

The filing indicates cash consideration for the securities to be sold and notes the option grant date for the subject shares as 10/06/2016 for the 10,000‑share entry.