Thurman Alex R. 4

What Happened Alex R. Thurman, CFO of Glaukos Corp (GKOS), exercised stock options and immediately sold shares on July 16, 2026. The filing shows an exercise of 10,000 shares at $38.68 each for $386,800, and an open-market sale of 10,000 shares at $160.00 each for $1,600,000. The Form 4 also lists a derivative conversion/disposition of 10,000 shares at $0 — the filing does not detail this line, but such entries commonly reflect option conversion mechanics or share surrender for withholding.

Key Details

• Transaction date: July 16, 2026.
• Exercises: 10,000 shares exercised at $38.68 = $386,800 (coded M).
• Sale: 10,000 shares sold at $160.00 = $1,600,000 (coded S).
• Derivative entry: 10,000 shares disposed at $0 (coded M) — not explained in the filing.
• Plan: Both the sales and option exercises were executed under a Rule 10b5-1 trading plan adopted Dec 15, 2025 (footnotes F2, F3).
• Other holdings noted: filing references 5,230 restricted stock units unvested and 225 shares purchased via the company ESPP (F1).
• Vesting detail for the options: vest over four years (25% after one year, then monthly over three years) (F4).
• Filing date: Form 4 filed July 21, 2026 for transactions on July 16, 2026 — this appears to be filed one business day late (Form 4s are normally due within two business days).

Context This was a classic exercise-and-sell (cashless exercise/sale) pattern: options were exercised and shares were sold the same day under a pre-established 10b5-1 plan. Such sales are often routine and pre-planned; they are not direct proof of bullish or bearish views by the insider. The derivative/disposition at $0 on the form likely relates to the mechanics of converting or settling the option but isn’t explained in the filing.