Gilliam Joseph E 4

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.