StockCIK 1192448
GLAUKOS Corp (GKOS): Insider Trades and Fund Holdings
In the past 12 months, GLAUKOS Corp insiders reported 0 open-market purchases worth $0 and 6 sales worth $14.5M; 3 of the sales were reported as made under a 10b5-1 trading plan.
0Insider buys, 12 months
$0Bought by insiders, 12 months
$14.5MSold by insiders, 12 months
2Tracked funds holding
Recent insider trades
Open-market purchases (code P) and sales (code S) from Form 4. Grants, option exercises and gifts are not shown. Latest filing: Oct 7, 2026.
| Filed | Insider | Type | Value |
|---|---|---|---|
| Oct 7 | Tomas NavratilCHIEF DEVELOPMENT OFFICER | ▼ SELL10b5-1 | $251K |
| Sep 28 | Tomas NavratilCHIEF DEVELOPMENT OFFICER | ▼ SELL10b5-1 | $249K |
| Sep 18 | Tomas NavratilCHIEF DEVELOPMENT OFFICER | ▼ SELL10b5-1 | $243K |
| Sep 1 | Tomas NavratilCHIEF DEVELOPMENT OFFICER | ▼ SELL | $2.48M |
| Aug 20 | Gilbert H. KlimanDirector | ▼ SELL | $475K |
| Aug 13 | Joseph E. GilliamCOO | ▼ SELL | $10.8M |
Source: SEC Form 4 filings, retrieved Oct 28, 2026. How we read filings
Insiders who traded in the past year
| Insider | Role | Buys | Bought | Sells | Sold |
|---|---|---|---|---|---|
| Tomas Navratil | CHIEF DEVELOPMENT OFFICER | 0 | $0 | 4 | $3.23M |
| Gilbert H. Kliman | Director | 0 | $0 | 1 | $475K |
| Joseph E. Gilliam | COO | 0 | $0 | 1 | $10.8M |
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Tracked funds that report GKOS
From each fund's latest 13F. Holdings are as of quarter end and are filed up to 45 days later.
| Fund | Shares | Value | Change |
|---|---|---|---|
| Renaissance Technologies | 147,192 | $20.6M | ▲ +23.8% |
| Bridgewater Associates | 3,310 | $463K | ▲ New |
Source: SEC Form 13F-HR filings, retrieved Oct 28, 2026. How we read filings
Reading these numbers
Insiders sell for many reasons: taxes, diversification, a house. Purchases with their own money are rarer and are usually read as more informative. A Form 4 is due within two business days of the trade. How to read a Form 4 →