Company profile

GLAUKOS Corp Insider Trading

GKOS

Every SEC Form 4 insider trading filing for GLAUKOS Corp (GKOS) since April 2023 — open-market buys and sells by directors and officers, option exercises, and cluster activity, updated as each filing is reported to the SEC. Why 2023?

Exchange
NYSE
Sector
Surgical & Medical Instruments & Apparatus
CIK
0001192448
Filings
251
Insiders
11
Last filing
2026-08-19
SEC EDGAR ↗Yahoo Finance ↗Finviz ↗Stock Analysis ↗

Activity summary

Recent insider activity is bullish. Over the last 30 days, 11 insiders purchased shares versus 4 sales. Buying was led by Gilliam Joseph E.

Three year balance

Buy and sell value by quarter, Q4 23 to Q3 26. GLAUKOS Corp insiders are net buyers across the period shown.

Q4 23Q1 24Q2 24Q3 24Q4 24Q1 25Q2 25Q3 25Q4 25Q1 26Q2 26Q3 26

Bars below the rule are sales, above are purchases. Largest quarter on the chart is $10.1B.

90 day insight

Over the last 90 days, GLAUKOS Corp insiders bought $5.1M (21 transactions) and sold $12.1M (7 transactions).

  • Most active insider: Thurman Alex R. with 12 transactions totaling $10.5M.
  • Largest single sale: $5.8M by Gilliam Joseph E on Aug 11, 2026.
  • 46% of recent sales were pre-scheduled 10b5-1 trades — typically less informative than open-market activity.

Activity skews bullish — buys outpace sales.

Insider Transactions

Sourced from SEC EDGAR Form 4 filings. Updated hourly.

DateInsiderCompanyTypeSharesPriceValue
Aug 19, 2026Kliman Gilbert HGKOS
Option Exercise
2,500$25.77$64K
Aug 19, 2026Kliman Gilbert HGKOS
Option Exercise
2,500——
Aug 19, 2026Kliman Gilbert HGKOS
Sale
2,500$190.00$475K
Aug 11, 2026Gilliam Joseph EGKOS
Option Exercise
20,000——
Aug 11, 2026Gilliam Joseph EGKOS
Option Exercise
10,000$48.46$485K

45 more transactions hidden

Free account · No credit card required

Building something? Get API access →

Query this yourself

The same rows, over the API.

curl "https://api.form4api.com/v1/transactions?ticker=GKOS" \
  -H "X-Api-Key: $KEY"
Get a key

Top insiders

By total value filed.

Gilliam Joseph EPRESIDENT & COO8 filings−$10.6M
Thurman Alex R.SVP & CHIEF FINANCIAL OFFICER11 filings−$7.0M
Kliman Gilbert H8 filings−$1.3M
Hoffmeister David F2 filings+$741K
Burns Thomas WilliamCHAIRMAN & CEO1 filing−$579K

Institutional Ownership

Top 13F-HR holders of GLAUKOS Corp as of 2026-06-30

↓ decreasing
Total reported AUM
$2.17B
QoQ change
-62.5%
Reporting period
2026-06-30
#1
BlackRock, Inc.
CIK 0002012383
$918.7M
6.6M shares
#2
State Street Corp
CIK 0000093751
$323.7M
2.3M shares
#3
BlackRock, Inc.
CIK 0002012383
$262.0M
1.9M shares

Data source: quarterly 13F-HR filings — institutional holders report positions within 45 days of quarter end. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →