Burns Thomas William 4

What Happened

• Thomas W. Burns, Chairman & CEO of Glaukos Corp (GKOS), had 4,059 shares withheld/disposed to satisfy tax withholding obligations tied to vested restricted stock units (RSUs). The withholding was done at $119.17 per share, totaling about $483,711.

Key Details

• Transaction date: 2026-02-24; filing date: 2026-02-26 (filed within the standard 2-business-day window).
• Price: $119.17 per share; Shares withheld/disposed: 4,059; Total value: ~$483,711.
• Transaction code: F — shares withheld to satisfy tax withholding upon vesting/delivery of RSUs (not an independent open-market sale).
• Footnote F1: These shares were withheld by the issuer to cover the Reporting Person’s tax withholding obligations related to RSUs granted on March 18, 2021.
• Footnote F2: The filing notes there are 81,912 RSUs that have not yet vested or been delivered to the Reporting Person.
• Shares owned after the transaction: not specified in the provided excerpt of the filing.

Context

• This was a tax-withholding disposition (routine), not a discretionary sale intended as a market-timing signal. For RSU vestings, companies commonly withhold shares to cover taxes rather than requiring a cash payment.
• Such withholding transactions are common and generally less informative about the insider’s view of the stock than open-market purchases or sales.