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GLAUKOS Corp (New York Stock Exchange:GKOS)
US · Delayed Price · Currency is USD
Healthcare · Medical - Devices
178.89+0.01 (+0.01%)
Insider Score
––Not scored
GKOS Insider Score
Insiders filed in the last 90 days, but none of those trades qualified for scoring — round-trip buys and filings whose price is far off the market are excluded.
GKOS Stock Insider Trading Activity
GKOS stock’s insider trading shows 22 sales on the open market for an estimated $18.18M by company insiders over the last 6 months.
Not enough price history.
Insider Trading Activity (Form 4 Filings)
An insider trade occurs when an individual that has non-public information about a company buys or sells shares of that company’s stock. Examples of insiders include a company’s executive officers (CEO, CFO, COO), its board of directors, and its major shareholders. Insiders are required to submit their trading activity to the SEC through Form 4 filings.
Scored window · last 90 days0 qualifying buys0 insiders$0 bought— these are the numbers in the rankings table; the full history below shows every filing (buys, sells and older activity).
| Insider | Action | Shares | Avg Cost | Total | Δ Holdings | Held After | Date | Grade | Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| Navratil Tomas Other | Sell | 888 | $163.93 | $145.57K | 1.3% | 69,930 | Oct 5, 2026 | — | Form 4 |
| Navratil Tomas Other | Sell | 312 | $165.60 | $51.67K | 0.4% | 69,291 | Oct 5, 2026 | — | Form 4 |
| Navratil Tomas Other | Sell | 327 | $164.78 | $53.88K | 0.5% | 69,603 | Oct 5, 2026 | — | Form 4 |
| Navratil Tomas Other | Sell | 136 | $152.71 | $20.77K | 0.2% | 72,130 | Sep 25, 2026 | — | Form 4 |
| Navratil Tomas Other | Sell | 1,083 | $154.88 | $167.74K | 1.5% | 70,818 | Sep 25, 2026 | — | Form 4 |
| Navratil Tomas Other | Sell | 229 | $154.24 | $35.32K | 0.3% | 71,901 | Sep 25, 2026 | — | Form 4 |
| Navratil Tomas Other | Sell | 167 | $151.70 | $25.33K | 0.2% | 72,266 | Sep 25, 2026 | — | Form 4 |
| Navratil Tomas Other | Sell | 103 | $163.20 | $16.81K | 0.1% | 73,787 | Sep 16, 2026 | — | Form 4 |
| Navratil Tomas Other | Sell | 4 | $172.00 | $688 | 0.0% | 72,433 | Sep 16, 2026 | — | Form 4 |
| Navratil Tomas Other | Sell | 234 | $170.95 | $40.00K | 0.3% | 72,437 | Sep 16, 2026 | — | Form 4 |
| Navratil Tomas Other | Sell | 120 | $168.38 | $20.21K | 0.2% | 72,671 | Sep 16, 2026 | — | Form 4 |
| Navratil Tomas Other | Sell | 460 | $167.32 | $76.97K | 0.6% | 72,791 | Sep 16, 2026 | — | Form 4 |
| Navratil Tomas Other | Sell | 191 | $166.20 | $31.74K | 0.3% | 73,251 | Sep 16, 2026 | — | Form 4 |
| Navratil Tomas Other | Sell | 345 | $164.60 | $56.79K | 0.5% | 73,442 | Sep 16, 2026 | — | Form 4 |
| Navratil Tomas Other | Sell | 10 | $182.50 | $1.82K | 0.0% | 73,890 | Aug 28, 2026 | — | Form 4 |
| Navratil Tomas Other | Sell | 7,643 | $180.25 | $1.38M | 8.7% | 79,991 | Aug 28, 2026 | — | Form 4 |
| Navratil Tomas Other | Sell | 6,091 | $181.19 | $1.10M | 7.6% | 73,900 | Aug 28, 2026 | — | Form 4 |
| Kliman Gilbert H Director | Sell | 2,500 | $190.00 | $475.00K | 6.3% | 37,406 | Aug 19, 2026 | — | Form 4 |
| Kliman Gilbert H Director | Option exercise | 2,500 | $25.77 | $64.42K | 6.7% | 39,906 | Aug 19, 2026 | — | Form 4 |
| Gilliam Joseph E COO | Option exercise | 10,000 | $48.46 | $484.60K | 8.2% | 132,588 | Aug 11, 2026 | — | Form 4 |
| Gilliam Joseph E COO | Option exercise | 20,000 | $55.18 | $1.10M | 19.5% | 122,588 | Aug 11, 2026 | — | Form 4 |
| Gilliam Joseph E COO | Option exercise | 20,000 | $55.18 | $1.10M | 24.2% | 102,588 | Aug 11, 2026 | — | Form 4 |
| Gilliam Joseph E COO | Option exercise | 10,000 | $48.46 | $484.60K | 13.8% | 82,588 | Aug 11, 2026 | — | Form 4 |
| Gilliam Joseph E COO | Sell | 32,037 | $180.49 | $5.78M | 30.6% | 72,588 | Aug 11, 2026 | — | Form 4 |
| Gilliam Joseph E COO | Sell | 27,963 | $178.89 | $5.00M | 21.1% | 104,625 | Aug 11, 2026 | — | Form 4 |
| Thurman Alex R. CFO | Sell | 20,000 | $180.13 | $3.60M | 31.3% | 43,906 | Aug 7, 2026 | — | Form 4 |
| Thurman Alex R. CFO | Option exercise | 20,000 | $33.81 | $676.20K | 45.6% | 63,906 | Aug 7, 2026 | — | Form 4 |
| WEN LEANA Director | Sell | 525 | $167.63 | $88.01K | 2.4% | 21,092 | Jul 31, 2026 | — | Form 4 |
What these mean— the action is the SEC’s own Form 4 transaction code. Only a buy or a sell is an open-market trade; the rest are transfers, awards and exercises, which is why they carry no price.
- Sell (S) — Open-market or private sale
- Option exercise (M) — Exercise or conversion of an exempt derivative
Disclaimer — Informational only — not investment advice. Insider transaction data is sourced from SEC Form 4 filings; market data from public feeds and may be delayed. The Insider Score is a proprietary score for research purposes and does not predict future performance. Always do your own research.