GLAUKOS Corp Chief Development Officer Tomas Navratil Sells 483 Shares for Tax Withholding

Tomas Navratil, Chief Development Officer of GLAUKOS Corp, filed a Form 4 disclosing the sale of 483 shares of common stock on June 25, 2026, at a price of $142.57 per share. The transaction was coded as "F" and represents shares withheld by the company to cover tax withholding obligations related to the vesting and delivery of restricted stock units previously granted on March 18, 2021. Following the transaction, Navratil holds 88,350 shares, which includes 38,817 restricted stock units that have not yet vested or been delivered. The sale was executed for tax purposes and does not represent a discretionary sale by the officer. The filing was signed by Diana Scherer as Attorney-in-Fact on June 29, 2026.