Gilliam Joseph E 4
4 · GLAUKOS Corp · Filed Mar 25, 2026
Research Summary
AI-generated summary of this filing
GLAUKOS (GKOS) President Joseph Gilliam Sells Shares for Tax Withholding
What Happened
Joseph E. Gilliam, President & COO of GLAUKOS Corp (GKOS), had a total of 15,118 shares disposed via issuer withholding to cover tax obligations upon vesting of restricted stock units. Transactions reported: 2,804 shares withheld on 2026-03-23 at $106.84 ($299,579), and two withholdings on 2026-03-24 of 4,926 shares at $105.23 ($518,363) and 7,388 shares at $105.23 ($777,439). The combined value of the withheld shares is approximately $1,595,381. These were tax-withholding dispositions (code F), not open-market sales.
Key Details
- Transaction dates & prices:
- 2026-03-23: 2,804 shares @ $106.84 = $299,579 (withheld for taxes) — footnote F1
- 2026-03-24: 4,926 shares @ $105.23 = $518,363 (withheld for taxes) — footnote F3
- 2026-03-24: 7,388 shares @ $105.23 = $777,439 (withheld for taxes) — footnote F3
- Total shares withheld/disposed: 15,118; total value ≈ $1,595,381.
- Shares owned after the transactions are not specified in the provided extract; filing footnotes show remaining unvested RSUs (see below).
- Notable footnotes:
- F1/F3: Shares were withheld by the issuer to satisfy tax withholding on vested restricted stock units (RSUs) granted previously (grants dated March 22, 2023 and March 24, 2022).
- F2/F4/F5: Reporting Person still holds unvested RSUs — 48,787 (F2), 39,725 (F4), and 26,133 (F5) that have not yet vested or been delivered.
- Filing/Timeliness: Form filed 2026-03-25 covering transactions through 2026-03-24; appears to be filed within standard SEC reporting timing for insiders.
Context
These dispositions are cashless tax-withholdings tied to RSU vesting (issuer retained shares to cover taxes), not discretionary open-market sales. Such withholding is routine and does not necessarily indicate the insider is reducing their overall position by choice.
Insider Transaction Report
- Tax Payment
Common Stock
[F1][F2]2026-03-23$106.84/sh−2,804$299,579→ 84,854 total - Tax Payment
Common Stock
[F3][F4]2026-03-24$105.23/sh−4,926$518,363→ 79,928 total - Tax Payment
Common Stock
[F3][F5]2026-03-24$105.23/sh−7,388$777,439→ 72,540 total
Footnotes (5)
- [F1]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 22, 2023.
- [F2]Includes 48,787 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 39,725 restricted stock units that have not yet vested or been delivered to the Reporting Person.
- [F5]Includes 26,133 restricted stock units that have not yet vested or been delivered to the Reporting Person.