Burns Thomas William 4

4 · GLAUKOS Corp · Filed Apr 3, 2026

AI-generated summary of this filing

Updated Apr 4, 2026

Glaukos (GKOS) CEO Thomas Burns Transfers Shares; Withholds $1.09M

What Happened

Thomas W. Burns, Chairman, CEO and a director of Glaukos Corp (GKOS), transferred 180,308 shares (recorded as gifts/transfers) to the Burns Family Trust on April 1, 2026.
On April 2, 2026, a total of 9,937 shares were surrendered/withheld to satisfy tax obligations (2,469 shares and 7,468 shares) at $109.60 per share, totaling $1,089,095.

Key Details

Transaction dates and prices:
- April 1, 2026 — 180,308 shares transferred (coded as Gift; $0 per share on Form 4 — internal transfer to trust).
- April 2, 2026 — 2,469 shares withheld at $109.60 (=$270,602) and 7,468 shares withheld at $109.60 (=$818,493).
Shares owned after transaction: Not specified in the provided filing excerpt.
Notable footnotes from the filing:
- F1: The 180,308-share transfer reflects moving shares from Burns’s direct ownership to the Burns Family Trust.
- F2/F4/F6: The filing references unvested restricted stock units (82,963; 78,274; 64,090, respectively) that have not yet been delivered.
- F3/F5: The withheld shares relate to tax withholding on vesting/delivery of RSUs granted on March 24, 2022 and March 14, 2024.
Filing timeliness: Form 4 filed April 3, 2026 for transactions on April 1–2, 2026 — appears to be timely.

Context

Transfers to a family trust (gift code G/F1) are internal estate/planning moves and do not necessarily signal buying or selling intent in the market.
The share surrenders at $109.60 were tax withholdings associated with RSU vesting (routine; not open-market sales). This is different from an open-market sale, where shares are sold to outside buyers.
Several RSUs referenced remain unvested per the footnotes, so additional withholding or deliveries could occur on future vesting dates.

Form 4

Period: 2026-04-02

DirectorCHAIRMAN & CEO

Transactions

Gift
Common Stock
[F1][F2]
2026-04-01−180,308→ 82,963 total
Gift
Common Stock
2026-04-01+180,308→ 1,141,593 total(indirect: By Trust)
Tax Payment
Common Stock
[F3][F4]
2026-04-02$109.60/sh−2,469$270,602→ 80,494 total
Tax Payment
Common Stock
[F5][F6]
2026-04-02$109.60/sh−7,468$818,493→ 73,026 total

Holdings

Footnotes (6)

[F1]The transaction reflects shares transferred from the Reporting Person's direct ownership to the Burns Family Trust.
[F2]Consists of 82,963 restricted stock units that have not yet vested or been delivered to the Reporting Person.
[F3]Consists of shares withheld by the Issuer with respect to tax withholding obligations of the Reporting Person upon vesting and delivery of shares of common stock underlying restricted stock units previously granted by the Issuer on March 24, 2022.
[F4]Includes 78,274 restricted stock units that have not yet vested or been delivered to the Reporting Person.
[F5]Consists of shares withheld by the Issuer with respect to tax withholding obligations of the Reporting Person upon vesting and delivery of shares of common stock underlying restricted stock units previously granted by the Issuer on March 14, 2024.
[F6]Includes 64,090 restricted stock units that have not yet vested or been delivered to the Reporting Person.

Signature

Diana Scherer, Attorney-in-Fact|2026-04-03

1 file