GLAUKOS Corp (GKOS) insider trading
No open-market insider purchases of GLAUKOS Corp are on record; 3 open-market sales are.
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Insider purchases
No open-market purchases on record.
Insider sales
3 open-market sales on record
| Filed | Insider | Sold |
|---|---|---|
| Oct 7 Form 4 (opens sec.gov) |
Tomas NavratilChief Development Officer · planned (10b5-1) | $251k 1,527 at $164.45 · 2% of holdings |
| Sep 28 Form 4 (opens sec.gov) |
Tomas NavratilChief Development Officer · planned (10b5-1) | $249k 1,615 at $154.28 · 2% of holdings |
| Sep 18 Form 4 (opens sec.gov) |
Tomas NavratilChief Development Officer · planned (10b5-1) | $243k 1,457 at $166.92 · 2% of holdings |
Most insider sales are planned in advance or made for personal reasons, so a sale says less than a buy.
Planned insider sales of GKOS (Form 144)
| Filed | Insider | To sell |
|---|---|---|
| Oct 30 Form 144 | Navratil TomasOfficer · no trading plan named | $10.6M 44,436 shares from Oct 30 |
A Form 144 is filed before an insider sells restricted or control shares; the Form 4 reports the sale once made.
Questions
Are insiders buying GKOS stock?
Not recently: no open-market purchases were filed in the last 90 days.
Who bought GKOS stock most recently?
No insider has bought GKOS on the open market in the filings on record.
How does InsiderBeacon score an insider buy?
Out of 100, from who bought, how much their stake grew, the size of the trade, whether other insiders bought within ten days, where the price sat in its 52-week range, and whether it was a first or a routine buy. The score is fixed when the filing arrives. The formula and the research behind it.
Data as of Oct 7, 2026, from SEC EDGAR Form 4 filings: open-market purchases (code P) of $25,000 or more, and open-market sales. Every row links to its filing. Scores summarise what a filing says (how the score works); outcomes are hypothetical, from the first close after the filing, and past results don't predict future ones. Disclaimer