Navratil Tomas 4

What Happened
Tomas Navratil, Chief Development Officer of Glaukos Corp (GKOS), had 483 shares of common stock withheld by the issuer to satisfy tax withholding obligations upon vesting of restricted stock units. The shares were valued at $142.57 each, totaling approximately $68,861. This was a tax-withholding disposition of shares underlying previously granted RSUs, not an open-market sale or a new purchase.

Key Details

• Transaction date: 2026-06-25; filing date (Form 4): 2026-06-29 (filed within the SEC two-business-day window).
• Shares withheld/disposed: 483 at $142.57 per share; total value ≈ $68,861.
• Transaction code: F (shares withheld to cover tax liability). Footnote F1: shares were withheld by the issuer to satisfy tax withholding on RSUs granted March 18, 2021.
• Footnote F2: filing notes the reporting person has 38,817 restricted stock units that have not yet vested or been delivered.
• Owned after transaction: not specified in the excerpt of the Form 4 provided.

Context
Share withholding to cover taxes is a routine administrative transaction when RSUs vest; it reduces the insider’s outstanding shares but is generally not considered a market-sentiment signal like an open-market sale or purchase.