X0609 4 2026-09-16 0001192448 GLAUKOS Corp GKOS 0001920053 Navratil Tomas false C/O GLAUKOS CORPORATION ONE GLAUKOS WAY ALISO VIEJO CA 92656 false true false false CHIEF DEVELOPMENT OFFICER true Common Stock 2026-09-16 4 S false 103 163.2 D 73787 D Common Stock 2026-09-16 4 S false 345 164.6 D 73442 D Common Stock 2026-09-16 4 S false 191 166.2 D 73251 D Common Stock 2026-09-16 4 S false 460 167.32 D 72791 D Common Stock 2026-09-16 4 S false 120 168.38 D 72671 D Common Stock 2026-09-16 4 S false 234 170.95 D 72437 D Common Stock 2026-09-16 4 S false 4 172 D 72433 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 12, 2026. This transaction was executed in multiple trades at prices ranging from $162.87 to $163.47. 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. Includes 38,817 restricted stock units that have not yet vested or been delivered to the Reporting Person. This transaction was executed in multiple trades at prices ranging from $164.40 to $165.26. 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 $165.55 to $166.22. 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 $167.04 to $167.57. 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 $168.37 to $168.38. 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 $170.76 to $171.10. 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 $172.00 to $172.01. 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. Diana Scherer, Attorney-in-Fact 2026-09-18