Glaukos Corp (GKOS)
Who owns Glaukos Corp (GKOS)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 96.3% of the shares are freely tradable; institutional investors hold 102.1%.
Ownership Structure
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 15.41 | 9,090,029 | -0.8 | 03/31/2026 |
| HHG PLC | 9.07 | 5,348,395 | +77.2 | 03/31/2026 |
| PRIMECAP Management Company | 5.71 | 3,370,628 | -0.2 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 5.44 | 3,208,363 | +0.0 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.25 | 2,508,771 | +0.0 | 03/31/2026 |
| State Street Corp | 3.70 | 2,182,617 | +2.8 | 03/31/2026 |
| Ameriprise Financial Inc | 2.73 | 1,610,774 | -23.5 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 6.10 | 3,581,785 | +0.0 | 07/28/2026 |
| Vanguard Morn Total Stk Mkt Idx Investor | 3.02 | 1,774,109 | +1.1 | 06/30/2026 |
| Vanguard Capital Opportunity Inv | 2.89 | 1,698,772 | +0.2 | 03/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 16. Jul 2026 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | Sell | 10,000 | 160.00 | 1,600,000 |
| 16. Jul 2026 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | Other | 10,000 | 38.68 | 386,800 |
| 9. Jul 2026 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | Sell | 10,000 | 155.00 | 1,550,000 |
| 9. Jul 2026 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | Other | 10,000 | 38.68 | 386,800 |
| 6. Jul 2026 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | Sell | 10,000 | 150.00 | 1,500,000 |
| 6. Jul 2026 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | Other | 10,000 | 38.68 | 386,800 |
| 1. Jul 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell | 716 | 139.06 | 99,567 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character.
View all insider transactions →Data as of: August 3, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.