InsiderSource
GKOS

GLAUKOS Corp

SEC CIK 1192448
$124.26 +5.2% · 90 days
90-day buys
$0
0 open-market
90-day sells
$6.35M
10 open-market
Net insider flow
−$6.35M
Net selling
Filings shown
42
Most recent

Insider transaction history

Form 4 filings for GKOS, newest first
View on SEC EDGAR ↗
GKOS
GLAUKOS Corp
Sell WEN LEANA · Director · Open-market sale · May 1, 2026
−$243.7K
1,700 sh @ $143
GKOS
GLAUKOS Corp
Option exercise Thurman Alex R. · SVP & CHIEF FINANCIAL OFFICER · Option exercise · Apr 30, 2026
+$386.8K
10,000 sh @ $39
GKOS
GLAUKOS Corp
Sell Thurman Alex R. · SVP & CHIEF FINANCIAL OFFICER · Open-market sale · Apr 30, 2026
−$1.4M
10,000 sh @ $140
GKOS
GLAUKOS Corp
Sell Navratil Tomas · CHIEF DEVELOPMENT OFFICER · Open-market sale · Apr 10, 2026
−$144.4K
1,237 sh @ $117
GKOS
GLAUKOS Corp
Tax withholding Navratil Tomas · CHIEF DEVELOPMENT OFFICER · Tax withholding · Apr 2, 2026
−$125.6K
1,146 sh @ $110
GKOS
GLAUKOS Corp
Tax withholding Navratil Tomas · CHIEF DEVELOPMENT OFFICER · Tax withholding · Apr 2, 2026
−$200.7K
1,831 sh @ $110
GKOS
GLAUKOS Corp
Tax withholding Thurman Alex R. · SVP & CHIEF FINANCIAL OFFICER · Tax withholding · Apr 2, 2026
−$174.2K
1,589 sh @ $110
GKOS
GLAUKOS Corp
Tax withholding Navratil Tomas · CHIEF DEVELOPMENT OFFICER · Tax withholding · Mar 31, 2026
−$635.5K
5,798 sh @ $110
GKOS
GLAUKOS Corp
Sell Thurman Alex R. · SVP & CHIEF FINANCIAL OFFICER · Open-market sale · Mar 25, 2026
−$267.3K
2,511 sh @ $106
GKOS
GLAUKOS Corp
Tax withholding Navratil Tomas · CHIEF DEVELOPMENT OFFICER · Tax withholding · Mar 24, 2026
−$267.9K
2,546 sh @ $105
GKOS
GLAUKOS Corp
Tax withholding Navratil Tomas · CHIEF DEVELOPMENT OFFICER · Tax withholding · Mar 23, 2026
−$280.8K
2,628 sh @ $107

About GKOS insider activity

This page tracks every recent Form 4 filed for GLAUKOS Corp with the U.S. Securities and Exchange Commission. Form 4 is the disclosure that company insiders — officers, directors, and holders of more than 10% of the stock — must file within two business days of buying or selling shares.

The summary above nets open-market purchases against open-market sales over the trailing 90 days. Open-market trades (codes P and S) tend to carry the most signal because they reflect a deliberate choice to put money in or take it out, as opposed to routine grants, option exercises, or tax-withholding events. Use the badges on each row to tell them apart, and always confirm details against the original filing before drawing conclusions.

Frequently asked questions

How often is GKOS insider data updated?

Continuously. We read from SEC EDGAR, so new Form 4 filings for GLAUKOS Corp usually appear here within minutes of being accepted by the SEC.

What does "net insider flow" mean?

It is the total dollar value of open-market insider purchases minus open-market sales over the last 90 days. A positive number (green) means insiders bought more than they sold; a negative number (red) means the reverse.

Why do some rows show grants or option exercises instead of buys?

Insiders receive stock through compensation as well as buying it outright. Form 4 captures all of these. We label each transaction by its SEC code so you can focus on open-market activity if you prefer.

Is this investment advice?

No. InsiderSource presents public filing data for informational purposes only. Insider activity is one of many factors to consider and is never a recommendation to buy or sell.