GKOS insider trading — Glaukos Corp
Over the last 90 days, insiders at Glaukos Corp (GKOS) made 0 open-market purchases worth $0 and 4 open-market sales worth $13.83M, making them net sellers by $13.83M. The largest sale was by Gilliam Joseph E (PRESIDENT & COO), who sold 60,000 shares for $10.78M on Aug 11, 2026.
Updated Oct 16, 2026.
Recent GKOS insider transactions
Every Form 4 filed by Glaukos Corp officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Oct 5, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | S · Sale · 10b5-1 | Direct | 1,527 | $164.45 | $251K | Form 4 |
| Sep 25, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | S · Sale · 10b5-1 | Direct | 1,615 | $154.28 | $249K | Form 4 |
| Sep 16, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | S · Sale · 10b5-1 | Direct | 1,457 | $166.92 | $243K | Form 4 |
| Aug 28, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | S · Sale | Direct | 13,744 | $180.67 | $2.48M | Form 4 |
| Aug 19, 2026 | Kliman Gilbert H | Director | M · Option exercise | Direct | 2,500 | $25.77 | $64K | Form 4 |
| Aug 19, 2026 | Kliman Gilbert H | Director | S · Sale | Direct | 2,500 | $190.00 | $475K | Form 4 |
| Aug 11, 2026 | Gilliam Joseph E | PRESIDENT & COO | M · Option exercise | Direct | 60,000 | $52.94 | $3.18M | Form 4 |
| Aug 11, 2026 | Gilliam Joseph E | PRESIDENT & COO | S · Sale | Direct | 60,000 | $179.74 | $10.78M | Form 4 |
| Aug 7, 2026 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | M · Option exercise · 10b5-1 | Direct | 20,000 | $33.81 | $676K | Form 4 |
| Aug 7, 2026 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | S · Sale · 10b5-1 | Direct | 20,000 | $180.13 | $3.60M | Form 4 |
| Jul 31, 2026 | Wen Leana | Director | S · Sale | Direct | 525 | $167.63 | $88K | Form 4 |
| Jul 16, 2026 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | M · Option exercise · 10b5-1 | Direct | 10,000 | $38.68 | $387K | Form 4 |
| Jul 16, 2026 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | S · Sale · 10b5-1 | Direct | 10,000 | $160.00 | $1.60M | Form 4 |
GKOS insider trading FAQ
Are insiders buying GKOS stock?
Not on the open market. In the last 90 days, Glaukos Corp insiders made no open-market purchases, and 4 open-market sales totaling $13.83M. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading GKOS?
Recent sellers: Gilliam Joseph E, Kliman Gilbert H, Navratil Tomas, Wen Leana.
Where does GKOS insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.