Eton Pharmaceuticals
ETON · NASDAQ
$50.19+$0.97 (+1.97%)TodayMarket closed ·
Prev close $49.22
Who owns ETON
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 44.5% of ETON’s shares.
- Opaleye Management Inc.10.0%
- EcoR1 Capital, LLC7.9%
- BlackRock Institutional Trust Company, N.A.6.2%
- Nantahala Capital Management, LLC4.3%
- Next 6 largest institutions16.1%
- All other shareholders55.5%
| Holder | Shares | % of shares |
|---|---|---|
| Opaleye Management Inc. | 2.73M | 9.98% |
| EcoR1 Capital, LLC | 2.17M | 7.93% |
| BlackRock Institutional Trust Company, N.A. | 1.71M | 6.24% |
| Nantahala Capital Management, LLC | 1.18M | 4.29% |
| Vanguard Capital Management, LLC | 976.57K | 3.57% |
| Brynjelsen (Sean E) | 956.18K | 3.49% |
| State Street Investment Management (US) | 701.79K | 2.56% |
| Geode Capital Management, L.L.C. | 652.30K | 2.38% |
| Morgan Stanley & Co. LLC | 617.02K | 2.25% |
| Oberweis Asset Management, Inc. | 501.60K | 1.83% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 696.98K | 2.54% |
| iShares Russell 2000 ETF | 690.99K | 2.52% |
| Oberweis Micro-Cap Fund | 483.90K | 1.77% |
| Fidelity Small Cap Index Fund | 289.01K | 1.06% |
| Vanguard Extended Market Index Fund | 271.49K | 0.99% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $27.80M (28 trades) of ETON on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Krempa David | Sale | 4.17K | $229.41K |
| Krempa David | Option exercise | 10.52K | — |
| Krempa David | Option exercise | 10.52K | — |
| MAIER PAUL V | Option exercise | 12.50K | — |
| MAIER PAUL V | Option exercise | 50.00K | — |
| MAIER PAUL V | Option exercise | 12.50K | $91.37K |
| MAIER PAUL V | Sale | 128 | $7.91K |
| MAIER PAUL V | Sale | 13.48K | $811.93K |
| MAIER PAUL V | Sale | 36.39K | $2.13M |
| MAIER PAUL V | Option exercise | 50.00K | $189.00K |
Short interest
Settled Sep 30, 2026
- Shares short
- 1.83M
- Days to cover
- 2.94
- % of shares outstanding
- 6.70%
- Average daily volume
- 624.71K
- Change since last report
- +18.9%
Information on this page is provided for informational purposes only and is not a recommendation to buy, sell or hold any security. Investing involves risk, including possible loss of principal. Market data is delayed at least 15 minutes and is provided without warranty. Analyst ratings, price targets and company data come from third-party sources. Past performance does not guarantee future results.