X0508 4 2026-01-22 0001192448 GLAUKOS Corp GKOS 0001539796 Stapley Marc C/O GLAUKOS CORPORATION ONE GLAUKOS WAY ALISO VIEJO CA 92656 true false false false 1 Common Stock 2026-01-22 4 M 0 15000 24.69 A 52449 D Common Stock 2026-01-22 4 S 0 3812 126.07 D 48637 D Common Stock 2026-01-22 4 S 0 3892 126.96 D 44745 D Common Stock 2026-01-22 4 S 0 1671 127.92 D 43074 D Common Stock 2026-01-22 4 S 0 4325 129.11 D 38749 D Common Stock 2026-01-22 4 S 0 1300 129.78 D 37449 D Stock Option (Right to Buy) 24.69 2026-01-22 4 M 0 15000 0 D 2017-06-02 2026-06-02 Common Stock 15000 0 D Includes 2,835 restricted stock units that have not vested or been delivered to the Reporting Person, as well as restricted stock units that have vested but delivery of which has been deferred by 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 June 4, 2025. This transaction was executed in multiple trades at prices ranging from $125.59 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. This transaction was executed in multiple trades at prices ranging from $126.756 to $127.56. 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. This transaction was executed in multiple trades at prices ranging from $127.58 to $128.30. 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. This transaction was executed in multiple trades at prices ranging from $128.59 to $129.59. 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. This transaction was executed in multiple trades at prices ranging from $129.62 to $130.00. 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. The option exercises reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 4, 2025. Diana Scherer, Attorney-in-Fact 2026-01-26