Eton Pharmaceuticals Inc (ETON)
Who owns Eton Pharmaceuticals Inc (ETON)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 77.1% of the shares are freely tradable; institutional investors hold 65.4%.
Ownership Structure
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Opaleye Management Inc | 10.44 | 2,860,000 | +0.0 | 03/31/2026 |
| EcoR1 Capital, LLC | 7.93 | 2,171,938 | +7.0 | 03/31/2026 |
| BlackRock Inc | 6.27 | 1,717,286 | -1.2 | 03/31/2026 |
| Vanguard Group Inc | 4.92 | 1,348,668 | +0.3 | 12/31/2025 |
| Nantahala Capital Management, LLC | 4.29 | 1,175,951 | +0.0 | 03/31/2026 |
| Vanguard Capital Management, LLC | 3.63 | 994,089 | +0.0 | 03/31/2026 |
| Geode Capital Management, LLC | 2.11 | 577,666 | +2.2 | 03/31/2026 |
| State Street Corp | 1.94 | 530,215 | +5.6 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard Total Stock Mkt Idx Inv | 2.61 | 715,024 | +0.0 | 04/30/2026 |
| iShares Russell 2000 ETF | 2.22 | 608,862 | +0.9 | 05/29/2026 |
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 |
|---|---|---|---|---|---|---|
| 14. Jul 2026 | Opaleye Management Inc. | 10% Owner | Sell | 13,315 | 37.54 | 499,886 |
| 14. Jul 2026 | Opaleye Management Inc. | 10% Owner | Sell | 15,000 | 37.54 | 563,147 |
| 14. Jul 2026 | Brynjelsen Sean | President & CEO | Other | 200,000 | 1.37 | 274,000 |
| 12. Jul 2026 | Brynjelsen Sean | President & CEO | Other | 27,500 | – | – |
| 12. Jul 2026 | Krempa David | Chief Business Officer | Other | 10,000 | – | – |
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: July 31, 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.