Thurman Alex R. 4

What Happened

• Alex R. Thurman, Chief Financial Officer of Glaukos Corp (GKOS), exercised 10,000 options at $38.68/share (cash cost $386,800) and sold 10,000 common shares in an open-market sale at $155.00/share (gross proceeds $1,550,000) on July 9, 2026. The filing also reports a derivative conversion/disposition of 10,000 shares at $0.00 (reported as a derivative transaction); the filing does not further explain that $0 entry. Net proceeds from the exercise + sale (proceeds minus exercise cost) were roughly $1.16M before taxes/withholdings.

Key Details

• Transaction date: July 9, 2026. Form 4 filed July 13, 2026 (timely within the 2 business‑day rule).
• Exercise: 10,000 options @ $38.68 = $386,800 paid.
• Sale: 10,000 shares @ $155.00 = $1,550,000 gross proceeds.
• Additional reported derivative entry: 10,000 shares @ $0.00 (no cash reported); filing gives no detail on this line.
• Shares owned after transaction: not specified in the excerpt; filing notes 5,230 restricted stock units that have not yet vested or been delivered to the reporting person (Footnote F1).
• Footnotes: Exercises and sales were effected pursuant to a Rule 10b5-1 trading plan adopted December 15, 2025 (F2, F3). Option vesting schedule noted in filing (F4).

Context

• Because the options were exercised and shares sold the same day under a 10b5-1 plan, this appears to be a planned/cashless transaction rather than an opportunistic market-timing sale. 10b5-1 plans are prearranged trading programs and are common for executives; they do not by themselves indicate the insider’s current view of the company.
• The filing is factual and timely; it shows liquidity from option exercise and sale, with roughly $1.16M in gross proceeds after the exercise cost (before taxes and any withheld shares).