Glaukos (GKOS) CFO exercises options and sells 10,000 shares under plan

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

GLAUKOS Corp Senior Vice President and Chief Financial Officer Alex R. Thurman reported an exercise-and-sell transaction in company stock. On April 30, 2026, he exercised stock options to acquire 10,000 shares of common stock at $38.68 per share, then sold 10,000 shares in open-market transactions at $140.00 per share.

Following these transactions, he directly owns 43,681 shares of common stock, which includes 5,230 restricted stock units that have not yet vested or been delivered. Both the sales and the option exercises were carried out under a pre-arranged Rule 10b5-1 trading plan adopted on December 15, 2025, indicating the activity was scheduled in advance.

Insider Trade Summary 10b5-1

Net Seller: 10,000 shares ($1,400,000)

Net Sell 3 txns

Insider Thurman Alex R.

Role SVP & CHIEF FINANCIAL OFFICER

Sold 10,000 shs ($1.40M)

Type	Security	Shares	Price	Value
Exercise	Stock Option (Right to Buy)	10,000	$38.68	$387K
Exercise	Common Stock	10,000	$38.68	$387K
Sale	Common Stock	10,000	$140.00	$1.40M

Holdings After Transaction: Stock Option (Right to Buy) — 30,000 shares (Direct, null); Common Stock — 53,681 shares (Direct, null)

Footnotes (1)

Includes 5,230 restricted stock units that have not yet vested or been delivered to the Reporting Person. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2025. The option exercises reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2025. These options vest over four years from the grant date, with 25% vesting on the first anniversary of the grant date and the remaining amount vesting in equal monthly installments over the following three years.

Key Figures

Shares sold: 10,000 shares Sale price: $140.00 per share Options exercised: 10,000 shares +3 more

6 metrics

Shares sold 10,000 shares Open-market sale of common stock on April 30, 2026

Sale price $140.00 per share Price for 10,000 common shares sold

Options exercised 10,000 shares Stock options exercised into common stock on April 30, 2026

Option exercise price $38.68 per share Exercise price of stock options converted into common shares

Shares held after 43,681 shares Total common shares directly owned after transactions

Unvested RSUs 5,230 units Restricted stock units included in post-transaction holdings

Key Terms

Rule 10b5-1 trading plan, restricted stock units, Stock Option (Right to Buy), open-market sale, +1 more

5 terms

Rule 10b5-1 trading plan regulatory

"The sales reported in this Form 4 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 5,230 restricted stock units that have not yet vested or been delivered"

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.

Stock Option (Right to Buy) financial

"Stock Option (Right to Buy) ... transaction code "M""

open-market sale financial

"transaction_action": "open-market sale""

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.

derivative exercise/conversion financial

"transaction_action": "derivative exercise/conversion""

Form 4 Insider Transactions: What Each Field Means →

05/04/2026 - 06:40 PM

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^*

Thurman Alex R.

(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)
	SVP & CHIEF FINANCIAL OFFICER

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/30/2026

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	04/30/2026		M		10,000	A	$38.68	53,681⁽¹⁾	D
Common Stock	04/30/2026		S⁽²⁾		10,000	D	$140	43,681⁽¹⁾	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)
Stock Option (Right to Buy)	$38.68	04/30/2026		M			10,000⁽³⁾	⁽⁴⁾	10/06/2026	Common Stock	10,000	$38.68	30,000	D

Explanation of Responses:

1. Includes 5,230 restricted stock units that have not yet vested or been delivered to the Reporting Person.

2. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2025.

3. The option exercises reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 15, 2025.

4. These options vest over four years from the grant date, with 25% vesting on the first anniversary of the grant date and the remaining amount vesting in equal monthly installments over the following three years.

	Diana Scherer, Attorney-in-Fact	05/04/2026
	** 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

FAQ

What insider transaction did GLAUKOS (GKOS) CFO Alex Thurman report?

Alex R. Thurman reported exercising options for 10,000 GLAUKOS shares at $38.68 and selling 10,000 common shares at $140.00 on April 30, 2026. The filing characterizes the sale as an open-market transaction under a Rule 10b5-1 trading plan.

How many GLAUKOS (GKOS) shares does the CFO hold after this Form 4?

After the reported transactions, Alex R. Thurman directly holds 43,681 GLAUKOS common shares. This total includes 5,230 restricted stock units that have not yet vested or been delivered, meaning some of his reported position is still subject to future vesting conditions.

At what prices did the GLAUKOS (GKOS) CFO exercise options and sell shares?

The CFO exercised stock options at $38.68 per share and sold 10,000 GLAUKOS common shares at $140.00 per share. This reflects an exercise of lower-priced options followed by open-market sales at a substantially higher trading price on the same date.

Was the GLAUKOS (GKOS) CFO’s stock sale pre-planned under Rule 10b5-1?

Yes. The filing states that the sales were effected pursuant to a Rule 10b5-1 trading plan adopted on December 15, 2025. Such plans pre-schedule trades in advance, which can reduce the significance of the transaction’s specific timing for interpreting insider sentiment.

What does the Form 4 reveal about the CFO’s GLAUKOS (GKOS) stock options?

The Form 4 shows an option exercise covering 10,000 shares at a $38.68 exercise price, tied to options that vest over four years. Vesting occurs 25% on the first anniversary of the grant date, with the remainder vesting in equal monthly installments over the following three years.

How many GLAUKOS (GKOS) shares were sold in this insider transaction?

The CFO sold 10,000 GLAUKOS common shares in open-market transactions at $140.00 per share on April 30, 2026. According to the transaction summary, this results in a net-sell position of 10,000 shares for the reported period on the Form 4.