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 Thurman Alex R. · SVP & CHIEF FINANCIAL OFFICER · Grant/award · filed Mar 27, 2026 ΔOwn +7.9%

+$0

3,303 sh

GKOS

GLAUKOS Corp

Grant/award Gilliam Joseph E · PRESIDENT & COO · Grant/award · filed Mar 27, 2026 ΔOwn +23%

+$0

17,792 sh

GKOS

GLAUKOS Corp

Grant/award Navratil Tomas · CHIEF DEVELOPMENT OFFICER · Grant/award · filed Mar 27, 2026 ΔOwn +14%

+$0

12,774 sh

GKOS

GLAUKOS Corp

Tax withholding Burns Thomas William · Director, CHAIRMAN & CEO · Tax withholding · filed Mar 25, 2026 ΔOwn −1.1%

−$288.8K

2,744 sh @ $105

GKOS

GLAUKOS Corp

Tax withholding Navratil Tomas · CHIEF DEVELOPMENT OFFICER · Tax withholding · filed Mar 25, 2026 ΔOwn −3.6%

−$267.9K

2,546 sh @ $105

GKOS

GLAUKOS Corp

Sell Thurman Alex R. · SVP & CHIEF FINANCIAL OFFICER · Open-market sale · filed Mar 25, 2026 ΔOwn −3.2%

Thurman Alex R. sold $160.1K of GKOS, trimming their stake 3%.

−$160.1K

1,521 sh @ $105

GKOS

GLAUKOS Corp

Tax withholding Navratil Tomas · CHIEF DEVELOPMENT OFFICER · Tax withholding · filed Mar 25, 2026 ΔOwn −3.6%

−$280.8K

2,628 sh @ $107

GKOS

GLAUKOS Corp

Sell Thurman Alex R. · SVP & CHIEF FINANCIAL OFFICER · Open-market sale · filed Mar 19, 2026 ΔOwn −1.3%

Thurman Alex R. sold $62K of GKOS, trimming their stake 1%.

−$62K

625 sh @ $99

GKOS

GLAUKOS Corp

Sell Stapley Marc · Director · Open-market sale · filed Jan 26, 2026 ΔOwn −7.3%

Stapley Marc sold $480.6K of GKOS, trimming their stake 7%.

−$480.6K

3,812 sh @ $126

GKOS

GLAUKOS Corp

Sell Stapley Marc · Director · Open-market sale · filed Jan 26, 2026 ΔOwn −8.0%

Stapley Marc sold $494.1K of GKOS, trimming their stake 8%.

−$494.1K

3,892 sh @ $127

GKOS

GLAUKOS Corp

Sell Stapley Marc · Director · Open-market sale · filed Jan 26, 2026 ΔOwn −3.7%

Stapley Marc sold $213.8K of GKOS, trimming their stake 4%.

−$213.8K

1,671 sh @ $128

GKOS

GLAUKOS Corp

Sell Stapley Marc · Director · Open-market sale · filed Jan 26, 2026 ΔOwn −10%

Stapley Marc sold $558.4K of GKOS, trimming their stake 10%.

−$558.4K

4,325 sh @ $129

GKOS

GLAUKOS Corp

Sell Stapley Marc · Director · Open-market sale · filed Jan 26, 2026 ΔOwn −3.4%

Stapley Marc sold $168.7K of GKOS, trimming their stake 3%.

−$168.7K

1,300 sh @ $130

GKOS

GLAUKOS Corp

Sell Burns Thomas William · Director, CHAIRMAN & CEO · Open-market sale · filed Jan 20, 2026 ΔOwn −55%

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

−$21.5M

186,945 sh @ $115

GKOS

GLAUKOS Corp

Sell Burns Thomas William · Director, CHAIRMAN & CEO · Open-market sale · filed Jan 20, 2026 ΔOwn −36%

Burns Thomas William sold $10.13M of GKOS, trimming their stake 36%.

−$10.13M

88,055 sh @ $115

GKOS

GLAUKOS Corp

Sell Thurman Alex R. · SVP & CHIEF FINANCIAL OFFICER · Open-market sale · filed Nov 26, 2025 ΔOwn −0.6%

Thurman Alex R. sold $33.1K of GKOS, trimming their stake 1%.

−$33.1K

315 sh @ $105

GKOS

GLAUKOS Corp

Sell Thurman Alex R. · SVP & CHIEF FINANCIAL OFFICER · Open-market sale · filed Mar 27, 2025 ΔOwn −1.9%

Thurman Alex R. sold $112.8K of GKOS, trimming their stake 2%.

−$112.8K

1,059 sh @ $107

GKOS

GLAUKOS Corp

Sell Thurman Alex R. · SVP & CHIEF FINANCIAL OFFICER · Open-market sale · filed Mar 27, 2025 ΔOwn −0.8%

Thurman Alex R. sold $46.2K of GKOS, trimming their stake 1%.

−$46.2K

430 sh @ $107

GKOS

GLAUKOS Corp

Sell Thurman Alex R. · SVP & CHIEF FINANCIAL OFFICER · Open-market sale · filed Mar 27, 2025 ΔOwn −0.1%

Thurman Alex R. sold $3.4K of GKOS.

−$3.4K

31 sh @ $108

GKOS

GLAUKOS Corp

Sell Stapley Marc · Director · Open-market sale · filed Aug 19, 2024 ΔOwn −1.5%

Stapley Marc sold $74.4K of GKOS, trimming their stake 1%.

−$74.4K

600 sh @ $124

GKOS

GLAUKOS Corp

Sell Stapley Marc · Director · Open-market sale · filed Aug 19, 2024 ΔOwn −2.8%

Stapley Marc sold $139.1K of GKOS, trimming their stake 3%.

−$139.1K

1,110 sh @ $125

GKOS

GLAUKOS Corp

Sell Stapley Marc · Director · Open-market sale · filed Aug 19, 2024 ΔOwn −10%

Stapley Marc sold $499.9K of GKOS, trimming their stake 10%.

−$499.9K

3,959 sh @ $126

GKOS

GLAUKOS Corp

Sell Stapley Marc · Director · Open-market sale · filed Aug 19, 2024 ΔOwn −1.7%

Stapley Marc sold $73.7K of GKOS, trimming their stake 2%.

−$73.7K

581 sh @ $127

GKOS

GLAUKOS Corp

Sell Stapley Marc · Director · Open-market sale · filed May 16, 2024 ΔOwn −5.3%

Stapley Marc sold $229.2K of GKOS, trimming their stake 5%.

−$229.2K

2,050 sh @ $112

GKOS

GLAUKOS Corp

Sell Stapley Marc · Director · Open-market sale · filed May 16, 2024 ΔOwn −6.0%

Stapley Marc sold $248.4K of GKOS, trimming their stake 6%.

−$248.4K

2,200 sh @ $113

GKOS

GLAUKOS Corp

Sell Stapley Marc · Director · Open-market sale · filed May 16, 2024 ΔOwn −5.8%

Stapley Marc sold $227.4K of GKOS, trimming their stake 6%.

−$227.4K

2,000 sh @ $114

GKOS

GLAUKOS Corp

Sell Stapley Marc · Director · Open-market sale · filed Mar 4, 2024 ΔOwn −6.3%

Stapley Marc sold $216.3K of GKOS, trimming their stake 6%.

−$216.3K

2,437 sh @ $89

GKOS

GLAUKOS Corp

Sell Stapley Marc · Director · Open-market sale · filed Mar 4, 2024 ΔOwn −4.1%

Stapley Marc sold $135.8K of GKOS, trimming their stake 4%.

−$135.8K

1,500 sh @ $91

GKOS

GLAUKOS Corp

Sell Stapley Marc · Director · Open-market sale · filed Mar 4, 2024 ΔOwn −6.7%

Stapley Marc sold $211K of GKOS, trimming their stake 7%.

−$211K

2,313 sh @ $91

GKOS

GLAUKOS Corp

Sell Burns Thomas William · Director, CHAIRMAN & CEO · Open-market sale · filed Jan 10, 2024 ΔOwn −0.1%

Burns Thomas William sold $6.3K of GKOS.

−$6.3K

73 sh @ $87

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.