Navratil Tomas 4

What Happened
Tomas Navratil, Chief Development Officer of GLAUKOS (GKOS), had a total of 5,174 shares disposed via issuer tax withholding when restricted stock units (RSUs) vested. On 2026-03-23 the issuer withheld 2,628 shares at $106.84 each (proceeds: $280,776). On 2026-03-24 the issuer withheld 2,546 shares at $105.23 each (proceeds: $267,916). Combined proceeds from these withholding dispositions were $548,692. These were not open-market sales but shares retained by the company to satisfy tax obligations on vested RSUs.

Key Details

• Transaction dates and prices:
  • 2026-03-23: 2,628 shares withheld @ $106.84 = $280,776 (footnote F1)
  • 2026-03-24: 2,546 shares withheld @ $105.23 = $267,916 (footnote F3)
• Total shares withheld/disposed: 5,174; total value: $548,692.
• Footnotes:
  • F1/F3: Shares were withheld by the issuer to satisfy the Reporting Person’s tax withholding obligations upon RSU vesting.
  • F2: Notes 29,840 RSUs that have not yet vested or been delivered to the Reporting Person.
  • F4: Notes 24,705 RSUs that have not yet vested or been delivered to the Reporting Person.
• Filing: Form 4 was filed on 2026-03-25 (covers transactions through 2026-03-24); this filing does not appear to be late under typical Form 4 timing rules.

Context

• These transactions are routine tax-withholding actions tied to RSU vesting (transaction code F). They are treated as dispositions on the Form 4 because shares were retained by the issuer to cover tax obligations, not sold in the open market. Such withholding transactions are common and do not, by themselves, indicate the insider’s view on company stock direction. Purchases by insiders generally provide stronger signals of confidence than routine withholding disposals.