Tomas Navratil sold $2.5M of GKOS
CHIEF DEVELOPMENT OFFICER at GLAUKOS Corp. 13,744 shares at an average of $180.67, traded Aug 28, 2026, filed Sep 1, 2026.
Score components
- +15RoleOfficer
- +25Trade size$2.5M at market
- +5Share of holdings soldSold 16% of holdings
- 0ClusterNo other insider selling within 14 days
What happened after comparable sells
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
Price around the trade, and since
From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™
Rows in this filing
Every transaction in Form 4 0001920053-26-000026, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Aug 28, 2026 | SOpen-market sale Common Stock | -7,643 | $180.25 | $1.4M | 79,991 | 41 d ago |
| Aug 28, 2026 | SOpen-market sale Common Stock | -6,091 | $181.19 | $1.1M | 73,900 | 41 d ago |
| Aug 28, 2026 | SOpen-market sale Common Stock | -10 | $182.50 | $1,825 | 73,890 | 41 d ago |
Related signals
Other insiders at GLAUKOS Corp and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 8Weak | GLAUKOS Corp | Tomas Navratil CHIEF DEVELOPMENT OFFICER | $251k 1,527 shares | -2% | |
| 8Weak | GLAUKOS Corp | Tomas Navratil CHIEF DEVELOPMENT OFFICER | $249k 1,615 shares | -2% | |
| 8Weak | GLAUKOS Corp | Tomas Navratil CHIEF DEVELOPMENT OFFICER | $243k 1,457 shares | -2% | |
| 1Weak | GLAUKOS Corp | Tomas Navratil CHIEF DEVELOPMENT OFFICER | $44k 517 shares | -1% | |
| 12Weak | GLAUKOS Corp | Tomas Navratil CHIEF DEVELOPMENT OFFICER | $454k 5,142 shares | -6% | |
| 13Weak | GLAUKOS Corp | Alex R. Thurman SVP & CHIEF FINANCIAL OFFICER | $162k 1,520 shares | -3% | |
| 43Moderate | GLAUKOS Corp | Mark J Foley director | $2.5M 20,687 shares | -28% | |
| 21Weak | GLAUKOS Corp | Tomas Navratil CHIEF DEVELOPMENT OFFICER | $503k 3,416 shares | -5% | |
| 18Weak | GLAUKOS Corp | Gilbert H Kliman director | $1.5M 10,000 shares | -24% | |
| 11Weak | GLAUKOS Corp | Joseph E Gilliam PRESIDENT & COO | $499k 3,328 shares | -3% |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.