Joseph E. Gilliam - 22 Jan 2026 Form 4 Insider Report for GLAUKOS Corp (GKOS)

Role
PRESIDENT & COO
Signature
Diana Scherer, Attorney-in-Fact
Issuer symbol
GKOS
Transactions as of
22 Jan 2026
Net transactions value
-$1,340,380
Form type
4
Filing time
26 Jan 2026, 21:05:54 UTC
Previous filing
23 Jan 2026
Next filing
26 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Gilliam Joseph E PRESIDENT & COO C/O GLAUKOS CORPORATION, ONE GLAUKOS WAY, ALISO VIEJO Diana Scherer, Attorney-in-Fact 26 Jan 2026 0001705850

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction GKOS Common Stock Options Exercise $579,280 +10,498 +11% $55.18 102,864 22 Jan 2026 Direct F1
transaction GKOS Common Stock Sale $303,397 -2,406 -2.3% $126.10 100,458 22 Jan 2026 Direct F1, F2, F3
transaction GKOS Common Stock Sale $393,793 -3,100 -3.1% $127.03 97,358 22 Jan 2026 Direct F1, F2, F4
transaction GKOS Common Stock Sale $230,270 -1,798 -1.8% $128.07 95,560 22 Jan 2026 Direct F1, F2, F5
transaction GKOS Common Stock Sale $412,920 -3,194 -3.3% $129.28 92,366 22 Jan 2026 Direct F1, F2, F6

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction GKOS Stock Option (Right to Buy) Options Exercise $408,222 -7,398 -12% $55.18 55,013 22 Jan 2026 Common Stock 7,398 $55.18 Direct F7, F8
transaction GKOS Stock Option (Right to Buy) Options Exercise $171,058 -3,100 -9.2% $55.18 30,713 22 Jan 2026 Common Stock 3,100 $55.18 Direct F7, F9
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

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).

Explanation of Responses:

Id Content
F1 Includes 62,605 restricted stock units that have not yet vested or been delivered to the Reporting Person.
F2 The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 11, 2025.
F3 This transaction was executed in multiple trades at prices ranging from $125.56 to $126.55. The price reported above reflects the weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
F4 This transaction was executed in multiple trades at prices ranging from $126.62 to $127.58. The price reported above reflects the weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
F5 This transaction was executed in multiple trades at prices ranging from $127.83 to $128.77. The price reported above reflects the weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
F6 This transaction was executed in multiple trades at prices ranging from $128.98 to $129.81. The price reported above reflects the weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
F7 The option exercises reported in this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 11, 2025.
F8 Represents a portion of an option to purchase shares of common stock previously granted by the Issuer on March 24, 2022, the vesting of which was subject to the Issuer's achievement of certain pre-determined operational targets over a multi-year performance period.
F9 Represents a portion of an option to purchase shares of common stock previously granted by the Issuer to the Reporting Person on March 24, 2022 in connection with his promotion to President and Chief Operating Officer, the vesting of which was subject to the Issuer's achievement of certain multi-year performance goals.