Greedy Insider
GLAUKOS Corp (GKOS) Insider Trades and Scores
GLAUKOS Corp (GKOS) insider trades: since Nov 18, 2025, Greedy Insider recorded 3 open-market buys and 93 sales on Form 4 from 8 insiders. The strongest recent filing scored 89 (Strong).
Who bought and who sold
Across the last 96 scoreable Form 4 transactions in GKOS, 3 were open-market purchases and 93 were sales. The table lists the most recent filings with each one's Greediness Score, so the structurally unusual trades are easy to spot first.
| Insider | Role | Type | Shares | Date | Score | ||
|---|---|---|---|---|---|---|---|
| Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell | 312.0 | 51667.2 | 2026-10-05 | 64 | View |
| Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell | 888.0 | 145569.84 | 2026-10-05 | 71 | View |
| Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell | 327.0 | 53883.06 | 2026-10-05 | 64 | View |
| Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell | 167.0 | 25333.9 | 2026-09-25 | 61 | View |
| Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell | 136.0 | 20768.56 | 2026-09-25 | 61 | View |
| Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell | 229.0 | 35320.96 | 2026-09-25 | 61 | View |
| Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell | 1083.0 | 167735.05 | 2026-09-25 | 72 | View |
| Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell | 103.0 | 16809.6 | 2026-09-16 | 62 | View |
| Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell | 345.0 | 56787.0 | 2026-09-16 | 64 | View |
| Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell | 191.0 | 31744.2 | 2026-09-16 | 62 | View |
The strongest recent filing
Navratil Tomas (CHIEF DEVELOPMENT OFFICER) sold 5,798 shares of GLAUKOS Corp on Mar 31, 2026, a filing that scored 89 (Strong). It scored Strong because a senior insider was trading and it was direct personal ownership. The score describes the filing, not future returns. This is not investment advice.
Cluster activity
A cluster buy is present: 4 insiders (Navratil Tomas, Thurman Alex R., Gilliam Joseph E, Burns Thomas William) traded GKOS the same direction within a 7-day window. Shared conviction is a stronger structural signal than a lone trade.
How this compares with GLAUKOS Corp's own history
Open-market buys make up 3% of the 96 scoreable GKOS transactions on record between Nov 18, 2025 and Oct 5, 2026. Comparing a filing with the company's own buy/sell mix is how you tell a routine disposal from an unusual accumulation.
Methodology and sources
Scores come from six published, user-adjustable factors (insider role, cluster activity, trade size versus the insider's own history, position impact, filing urgency, and direct versus indirect ownership). The score describes the filing, not future returns. This is not investment advice.
Key facts
- Scoreable Form 4 transactions on record: 96
- Open-market buys: 3
- Sales: 93
- Distinct insiders: 8
- Strongest recent Greediness Score: 89 (Strong)
Primary sources
Related
- Strongest filing
- GKOS in the live feed
- How the Greediness Score works
- What is a cluster buy?
- Form 4 transaction codes
The score describes the filing, not future returns. This is not investment advice.