Navratil Tomas 4

What Happened
Tomas Navratil, Chief Development Officer of GLAUKOS Corp (GKOS), had shares withheld by the company to satisfy tax withholding obligations upon vesting of restricted stock units (RSUs). Two withholdings on April 2, 2026 disposed of 1,146 shares at $109.60 each ($125,602) and 1,831 shares at $109.60 each ($200,678), for a combined 2,977 shares and total value of approximately $326,280. These were not open-market sales by Navratil but issuer-withheld shares to cover taxes.

Key Details

• Transaction date: April 2, 2026; filing date (Form 4): April 3, 2026 (timely filing).
• Price per share: $109.60. Shares withheld: 1,146 and 1,831 (total 2,977). Total value ≈ $326,280.
• Footnotes: F1 and F3 state the shares were withheld by the issuer to satisfy tax withholding on RSUs granted Mar 24, 2022 and Mar 14, 2024.
• Additional holdings noted: F2 and F4 reference 43,483 and 39,791 RSUs that have not yet vested or been delivered.
• Transaction code F = tax withholding (not a market sale under the insider’s discretion).

Context
This was a routine cashless/tax-withholding disposition related to vested RSUs — the company retained shares to cover tax liabilities rather than Navratil selling shares on the open market. Such withholdings are common and generally do not signal a change in insider sentiment the way voluntary open-market purchases or planned sales might.