GKOS

GLAUKOS Corp

Name: GLAUKOS Corp insider trading (SEC Form 4) history
Creator: U.S. Securities and Exchange Commission

SEC CIK 1192448

$129.80 +14.6% · 90 days

90-day buys

0 open-market

90-day sells

$6.51M

11 open-market

Net insider flow

−$6.51M

Net selling

Filings shown

Most recent

At a glance

Over the last 90 days, insiders at GKOS have sold a net $6.51M of stock (0 open-market buys vs 11 sells).

Largest recent trade: Burns Thomas William sold $21.5M of GKOS, trimming their stake 55%.

Most active filer: Burns Thomas William, with 28 transactions among the recent filings shown.

Insider transaction history

Form 4 filings for GKOS, newest first

View on SEC EDGAR ↗

GKOS

GLAUKOS Corp

Grant/award WEN LEANA · Director · Grant/award · filed 2w ago ΔOwn +9.5%

+$0

1,878 sh

GKOS

GLAUKOS Corp

Grant/award WEISNER AIMEE S · Director · Grant/award · filed 2w ago ΔOwn +10.0%

+$0

1,878 sh

GKOS

GLAUKOS Corp

Grant/award Torres Denice · Director · Grant/award · filed 2w ago ΔOwn +8.4%

+$0

1,878 sh

GKOS

GLAUKOS Corp

Grant/award Foley Mark J · Director · Grant/award · filed 2w ago ΔOwn +3.2%

+$0

1,878 sh

GKOS

GLAUKOS Corp

Grant/award Hoffmeister David F · Director · Grant/award · filed 2w ago ΔOwn +3.9%

+$0

1,878 sh

GKOS

GLAUKOS Corp

Grant/award Kliman Gilbert H · Director · Grant/award · filed 2w ago ΔOwn +5.3%

+$0

1,878 sh

GKOS

GLAUKOS Corp

Grant/award Stapley Marc · Director · Grant/award · filed 2w ago ΔOwn +5.0%

+$0

1,878 sh

GKOS

GLAUKOS Corp

Option exercise Hoffmeister David F · Director · Option exercise · filed 3w ago ΔOwn +46%

+$370.4K

15,000 sh @ $25

GKOS

GLAUKOS Corp

Option exercise Kliman Gilbert H · Director · Option exercise · filed May 18, 2026 ΔOwn +14%

+$123.5K

5,000 sh @ $25

GKOS

GLAUKOS Corp

Sell Kliman Gilbert H · Director · Open-market sale · filed May 18, 2026 ΔOwn −12%

Kliman Gilbert H sold $703.8K of GKOS, trimming their stake 12%.

−$703.8K

5,000 sh @ $141

GKOS

GLAUKOS Corp

Option exercise Kliman Gilbert H · Director · Option exercise · filed May 13, 2026 ΔOwn +14%

+$123.5K

5,000 sh @ $25

GKOS

GLAUKOS Corp

Sell Kliman Gilbert H · Director · Open-market sale · filed May 13, 2026 ΔOwn −12%

Kliman Gilbert H sold $675K of GKOS, trimming their stake 12%.

−$675K

5,000 sh @ $135

GKOS

GLAUKOS Corp

Sell Gilliam Joseph E · PRESIDENT & COO · Open-market sale · filed May 4, 2026 ΔOwn −21%

Gilliam Joseph E sold $2.81M of GKOS, trimming their stake 21%.

−$2.81M

19,573 sh @ $144

GKOS

GLAUKOS Corp

Sell WEN LEANA · Director · Open-market sale · filed May 4, 2026 ΔOwn −7.9%

Wen Leana sold $243.7K of GKOS, trimming their stake 8%.

−$243.7K

1,700 sh @ $143

GKOS

GLAUKOS Corp

Option exercise Thurman Alex R. · SVP & CHIEF FINANCIAL OFFICER · Option exercise · filed May 4, 2026 ΔOwn +23%

+$386.8K

10,000 sh @ $39

GKOS

GLAUKOS Corp

Sell Thurman Alex R. · SVP & CHIEF FINANCIAL OFFICER · Open-market sale · filed May 4, 2026 ΔOwn −19%

Thurman Alex R. sold $1.4M of GKOS, trimming their stake 19%.

−$1.4M

10,000 sh @ $140

GKOS

GLAUKOS Corp

Sell Navratil Tomas · CHIEF DEVELOPMENT OFFICER · Open-market sale · filed Apr 14, 2026 ΔOwn −1.3%

Navratil Tomas sold $144.4K of GKOS, trimming their stake 1%.

−$144.4K

1,237 sh @ $117

GKOS

GLAUKOS Corp

Sell Navratil Tomas · CHIEF DEVELOPMENT OFFICER · Open-market sale · filed Apr 14, 2026 ΔOwn −0.2%

Navratil Tomas sold $24.7K of GKOS.

−$24.7K

210 sh @ $117

GKOS

GLAUKOS Corp

Sell Navratil Tomas · CHIEF DEVELOPMENT OFFICER · Open-market sale · filed Apr 14, 2026 ΔOwn −0.7%

Navratil Tomas sold $73.3K of GKOS, trimming their stake 1%.

−$73.3K

614 sh @ $119

GKOS

GLAUKOS Corp

Sell Navratil Tomas · CHIEF DEVELOPMENT OFFICER · Open-market sale · filed Apr 14, 2026

Navratil Tomas sold $3.8K of GKOS.

−$3.8K

32 sh @ $120

GKOS

GLAUKOS Corp

Tax withholding Navratil Tomas · CHIEF DEVELOPMENT OFFICER · Tax withholding · filed Apr 3, 2026 ΔOwn −1.2%

−$125.6K

1,146 sh @ $110

GKOS

GLAUKOS Corp

Tax withholding Navratil Tomas · CHIEF DEVELOPMENT OFFICER · Tax withholding · filed Apr 3, 2026 ΔOwn −1.9%

−$200.7K

1,831 sh @ $110

GKOS

GLAUKOS Corp

Tax withholding Thurman Alex R. · SVP & CHIEF FINANCIAL OFFICER · Tax withholding · filed Apr 3, 2026 ΔOwn −3.5%

−$174.2K

1,589 sh @ $110

GKOS

GLAUKOS Corp

Tax withholding Gilliam Joseph E · PRESIDENT & COO · Tax withholding · filed Apr 3, 2026 ΔOwn −3.3%

−$347.3K

3,169 sh @ $110

GKOS

GLAUKOS Corp

Tax withholding Burns Thomas William · Director, CHAIRMAN & CEO · Tax withholding · filed Apr 3, 2026 ΔOwn −3.0%

−$270.6K

2,469 sh @ $110

GKOS

GLAUKOS Corp

Tax withholding Burns Thomas William · Director, CHAIRMAN & CEO · Tax withholding · filed Apr 3, 2026 ΔOwn −9.3%

−$818.5K

7,468 sh @ $110

GKOS

GLAUKOS Corp

Gift Burns Thomas William · Director, CHAIRMAN & CEO · Gift · filed Apr 3, 2026 ΔOwn +19%

+$0

180,308 sh

GKOS

GLAUKOS Corp

Tax withholding Navratil Tomas · CHIEF DEVELOPMENT OFFICER · Tax withholding · filed Apr 2, 2026 ΔOwn −5.7%

−$635.5K

5,798 sh @ $110

GKOS

GLAUKOS Corp

Grant/award Burns Thomas William · Director, CHAIRMAN & CEO · Grant/award · filed Mar 27, 2026 ΔOwn +5.7%

+$0

14,184 sh

GKOS

GLAUKOS Corp

Sell Thurman Alex R. · SVP & CHIEF FINANCIAL OFFICER · Open-market sale · filed Mar 27, 2026 ΔOwn −5.6%

Thurman Alex R. sold $267.3K of GKOS, trimming their stake 6%.

−$267.3K

2,511 sh @ $106

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.