Burns Thomas William 4

What Happened
Thomas William Burns, Chairman & CEO and a director of GLAUKOS Corp (GKOS), had 2,801 shares withheld by the company on March 16, 2026 to satisfy tax-withholding obligations tied to vested restricted stock units (RSUs). The withheld shares were valued at approximately $277,131 based on a per-share price of $98.94. This was a tax-withholding disposal (Form 4 code F), not an open-market sale.

Key Details

• Transaction date: 2026-03-16; filing date: 2026-03-19 (no late-filing flag provided in the materials here).
• Transaction type/code: F — shares withheld for tax withholding upon vesting of RSUs.
• Shares withheld/disposed: 2,801 at $98.94 each; total value ≈ $277,131.
• Footnote F1: Shares were withheld by the issuer to satisfy the Reporting Person’s tax withholding obligations upon vesting and delivery of RSUs granted March 14, 2024.
• Footnote F2: The filing notes the Reporting Person still has 64,610 restricted stock units that have not yet vested or been delivered.
• Shares owned after the transaction: not specified in the provided summary.

Context
Share withholding to cover taxes on vested RSUs is a routine, non-market disposal (a cashless withholding) and does not necessarily signal a change in the insider’s view of the company. The filing shows a remaining pool of 64,610 unvested RSUs for Burns; the withheld shares relate specifically to the March 14, 2024 RSU grant.