Glaukos Corp ($GKOS) Chief Development Officer Disposes 755 Shares for Tax Withholding

Executive Summary

On November 4, 2026, a Form 4 was filed for GLAUKOS Corp ($GKOS) disclosing transactions executed on April 9, 2024, by Tomas Navratil, the company's Chief Development Officer. The filing reported the disposition of 755 shares of Common Stock with an aggregate value of $67,606.75 via transaction code F (shares withheld by the issuer to cover tax obligations upon RSU vesting).

Transaction Details

1. First Tranche (April 9, 2024):

   • Shares Withheld: 495
   • Price Per Share: $87.61
   • Value: $43,366.95
   • Underlying Grant: Restricted Stock Units granted March 18, 2021

2. Second Tranche (April 9, 2024):

   • Shares Withheld: 260
   • Price Per Share: $93.23
   • Value: $24,239.80
   • Underlying Grant: Restricted Stock Units granted March 24, 2022

Following these withholding events, Navratil beneficially owns 68,536 shares directly (inclusive of 37,328 unvested RSUs as noted in the footnotes).

Market & Trading Significance

• Significance Level: Low
• Rationale: Dispositions coded as 'F' represent mandatory or automatic withholding of shares to satisfy tax withholding obligations upon the vesting and delivery of previously awarded equity awards. They do not constitute open-market sales or discretionary divestitures by the insider, offering no directional signal regarding executive sentiment.