Eton Pharmaceuticals, Inc.
ETON- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001710340
In the last 90 days, Eton Pharmaceuticals, Inc. insiders filed 0 open-market purchases and 5 sales; 164 institutions reported holding it in 13F filings for Q2 2026, worth $766.6M in total; no superinvestor holds it.
Open-market trades, last 90 days
Open-market purchases (P) and sales (S) by Eton Pharmaceuticals, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.
- Open-market buys
- 0 filings
- Open-market sells
- 5 filings
- 4 insiders, $16.5M in total
- Insiders trading
- 4
- Net value
- −$16.5M
- Purchases minus sales
Insider roster
Directors, officers and 10% owners who have filed a Form 4 for Eton Pharmaceuticals, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.
| Name | Title | Last reported holding | Last filing | Filings, past year |
|---|---|---|---|---|
| Maier Paul V | Director | 72,245 | Aug 31, 2026 | 3 |
| Krempa David | Chief Business Officer | 37,025 | Aug 24, 2026 | 7 |
| Brynjelsen Sean | President & CEO | 961,194 | Aug 20, 2026 | 6 |
| Casamento Charles J | Director | – | Aug 4, 2026 | 2 |
| Matthews Judith M. | Chief Financial Officer | – | Aug 4, 2026 | 1 |
| Erdogan-Trinkaus Ipek | Chief Commercial Officer | 2,403 | Aug 4, 2026 | 3 |
| Riedel Norbert G | Director | 67,155 | Aug 4, 2026 | 4 |
| Adams Jennifer McKie | Director | 0 | Aug 4, 2026 | 3 |
| Opaleye Management Inc. | 10% Owner | 40,000Indirect | Jul 17, 2026 | 2 |
| Gruber James R. | Chief Financial Officer | 213,420 | Jan 14, 2026 | 2 |
| Troutman William Wilson | CFO and Secretary | 23,027 | Feb 28, 2022 | 0 |
Insider trades
Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Aug 31, 2026 (view filing)4:06 PM ET | Aug 28 | 3 days | Maier Paul VDirector | SSale | −50.0K | $59.07 | −$2.95M | −45.6%59.7K after | Amended3 lots |
| Aug 24, 2026 (view filing)5:19 PM ET | Aug 24 | Same day | Krempa DavidChief Business Officer | SSale | −25.0K | $65.07 | −$1.63M | −40.3%37.0K after | |
| Aug 20, 2026 (view filing)6:26 PM ET | Aug 19-20 | 1 day | Brynjelsen SeanPresident & CEO | SSale | −100.0K | $60.88 | −$6.09M | −9.4%961.2K after | 4 lots |
| Jul 17, 2026 (view filing)7:12 PM ET | Jul 14 | 3 days | Opaleye Management Inc.10% Owner | SSaleCommon Stock, par value $0.001 per share | −28.3K | $37.54 | −$1.06M | −41.4%40.0K after | Amended2 lots |
| Jul 7, 2026 (view filing)6:29 PM ET | Jul 2-7 | 5 days | Opaleye Management Inc.10% Owner | SSaleCommon Stock, par value $0.001 per share | −126.7K | $37.64 | −$4.77M | −70.4%53.3K after | 5 lots |
| Jun 17, 2026 (view filing) | Jun 17 | Same day | Adams Jennifer McKieDirector | SSale | −50.0K | $32.48 | −$1.62M | −100.0%0 after | |
| May 29, 2026 (view filing) | May 28 | 1 day | Brynjelsen SeanPresident & CEO | SSale | −120.0K | $31.88 | −$3.83M | −12.6%833.7K after | 2 lots |
| May 27, 2026 (view filing) | May 22-27 | 5 days | Krempa DavidChief Business Officer | SSale | −100.0K | $32.30 | −$3.23M | −79.8%25.2K after | 5 lots |
| Aug 20, 2025 (view filing) | Aug 19-20 | 1 day | Gruber James R.Chief Financial Officer | SSale | −41.7K | $16.15 | −$673.7K | −16.9%204.8K after | 2 lots |
| Jun 16, 2025 (view filing) | Jun 12-16 | 4 days | Krempa DavidChief Business Officer | SSale | −34.0K | $14.83 | −$504.3K | −5.3%612.6K after | 3 lots |
| Jun 12, 2025 (view filing) | Jun 10 | 2 days | Opaleye Management Inc.10% Owner | PPurchaseCommon Stock, par value $0.001 per share | +7.93K | $15.82 | +$125.5K | +10.3%85.0K after | 2 lots |
| Jun 5, 2025 (view filing) | Jun 3-5 | 2 days | Brynjelsen SeanPresident & CEO | SSale | −210.0K | $17.11 | −$3.59M | −6.8%2.87M after | 5 lots |
| Oct 25, 2024 (view filing) | Oct 23 | 2 days | Opaleye Management Inc.10% Owner | PPurchaseCommon Stock, par value $0.001 per share | +10.0K | $7.98 | +$79.8K | +0.4%2.77M after | |
| Oct 8, 2024 (view filing) | Oct 4-8 | 4 days | Opaleye Management Inc.10% Owner | PPurchaseCommon Stock, par value $0.001 per share | +62.1K | $6.99 | +$434.1K | +310.3%82.1K after | 6 lots |
| Sep 12, 2024 (view filing) | Sep 10-11 | 2 days | Opaleye Management Inc.10% Owner | PPurchaseCommon Stock, par value $0.001 per share | +107.5K | $4.70 | +$504.9K | New position75.0K after | 4 lots |
| Sep 23, 2022 (view filing) | Sep 22 | 1 day | Brynjelsen SeanChief Executive Officer | PPurchase | +10.0K | $2.10 | +$21.0K | +1.0%1.04M after | |
| Nov 19, 2021 (view filing) | Nov 17 | 2 days | Opaleye Management Inc.10% Owner | SSaleCommon Stock, par value $0.001 per share | −25.0K | $4.67 | −$116.8K | −1.0%2.38M after | |
| Nov 17, 2021 (view filing) | Nov 15-16 | 2 days | Opaleye Management Inc.10% Owner | SSaleCommon Stock, par value $0.001 per share | −15.4K | $4.85 | −$74.8K | −15.4%85.0K after | 4 lots |
| Nov 9, 2021 (view filing) | Nov 5-8 | 4 days | Opaleye Management Inc.10% Owner | SSaleCommon Stock, par value $0.001 per share | −220.4K | $6.25 | −$1.38M | −71.8%86.4K after | 4 lots |
| Nov 5, 2021 (view filing) | Nov 3-4 | 2 days | Opaleye Management Inc.10% Owner | SSaleCommon Stock, par value $0.001 per share | −202.2K | $6.49 | −$1.31M | −67.5%97.5K after | 4 lots |
| Oct 13, 2021 (view filing) | Oct 8-12 | 5 days | Opaleye Management Inc.10% Owner | SSaleCommon Stock, par value $0.001 per share | −165.1K | $5.03 | −$831.1K | −58.5%117.1K after | 6 lots |
| Aug 20, 2021 (view filing) | Aug 20 | Same day | Troutman William WilsonCFO, Treasurer & Secretary | PPurchase | +5.00K | $4.43 | +$22.1K | +27.7%23.0K after | |
| Aug 20, 2021 (view filing) | Aug 20 | Same day | Brynjelsen SeanPresident & CEO | PPurchase | +10.0K | $4.32 | +$43.2K | +1.0%1.03M after | |
| Aug 6, 2021 (view filing) | Aug 4-6 | 2 days | Opaleye Management Inc.10% Owner | SSaleCommon Stock, par value $0.001 per share | −604.5K | $5.83 | −$3.52M | −83.8%117.1K after | 6 lots |