ETON insider buying – Eton Pharmaceuticals, Inc.
14 insider purchases since 2016 worth $4.3M by 5 different insiders. Last 12 months: 0 purchases, $0. Most recent filing: 2025-06-12.
Mid company Public float $361M (latest 10-K, SEC).
Same time range as the chart above - each mark sits under the week of the trade. Circles = purchases (height = price paid, size = amount), red triangles = open-market sales of $50k+. Prices as reported, not adjusted for later stock splits. 6 older purchases (before the 5-year window) are listed in the table below.
Purchases are open-market buys (SEC Form 4, code "P") - insiders paying with their own money. Sales are open-market sales (code "S") of $50,000 or more; many sales are pre-planned (Rule 10b5-1) or made for taxes and diversification. Each row links to the original filing.
Bought, sold, still holding?
| Insider | Bought | First / last buy | Sold since 2016 | Holds now* | Status |
|---|---|---|---|---|---|
| Opaleye Management Inc. 10% Owner | $3.9M 5× · 587,500 sh | 2020-10-16 2025-06-10 | 10× · $16.0M last 2026-07-14 | 2,705,000 shares as of 2026-07-17 | Sold part |
| BRYNJELSEN SEAN CEO | $204,098 5× · 40,000 sh | 2019-05-20 2022-09-22 | 3× · $13.5M last 2026-08-19 | 1,004,909 shares as of 2026-08-20 | Sold part |
| BAUM MARK L Director | $60,000 1× · 10,000 sh | 2018-11-15 2018-11-15 | – | 794,745 shares as of 2018-11-15 | Holds - never sold |
| Troutman William Wilson CFO | $52,150 2× · 10,000 sh | 2018-11-15 2021-08-20 | – | 23,027 shares as of 2021-08-20 | Holds - never sold |
| CASAMENTO CHARLES J Director | $21,385 1× · 3,500 sh | 2019-08-09 2019-08-09 | 1× · $5.3M last 2026-11-10 | 71,920 shares as of 2019-08-12 | Sold part |
* Shares held after the insider's most recent SEC filing for this company (all share classes, direct and indirect). If an insider stops filing, later changes are not known.
Insider buying and selling by year
| Year | Purchases | Bought | Buyers | Sales | Sold |
|---|---|---|---|---|---|
| 2026 | 0 | – | – | 9 | $30.5M |
| 2025 | 1 | $125,453 | 1 | 3 | $4.8M |
| 2024 | 3 | $1.0M | 1 | – | – |
| 2022 | 1 | $21,000 | 1 | – | – |
| 2021 | 3 | $95,150 | 2 | 9 | $20.8M |
| 2020 | 1 | $2.8M | 1 | – | – |
| 2019 | 3 | $131,483 | 2 | – | – |
| 2018 | 2 | $90,000 | 2 | – | – |
Insider purchases
| Filed | Insider | Role | Shares | Avg price | Value | Holdings | Filing |
|---|---|---|---|---|---|---|---|
| 2025-06-12 | Opaleye Management Inc. | 10% Owner | 7,930 | $15.82 | $125,453 | +0.3% | SEC |
| 2024-10-25 | Opaleye Management Inc. | 10% Owner | 10,000 | $7.98 | $79,800 | +0.4% | SEC |
| 2024-10-08 | Opaleye Management Inc. | 10% Owner | 62,070 | $6.99 | $434,108 | +2.3% | SEC |
| 2024-09-12 | Opaleye Management Inc. | 10% Owner | 107,500 | $4.70 | $504,875 | +4.1% | SEC |
| 2022-09-23 | BRYNJELSEN SEAN | CEO | 10,000 | $2.10 | $21,000 | +1.0% | SEC |
| 2021-08-20 | Troutman William Wilson | CFO | 5,000 | $4.43 | $22,150 | +27.7% | SEC |
| 2021-08-20 | BRYNJELSEN SEAN | CEO | 10,000 | $4.32 | $43,200 | +1.0% | SEC |
| 2021-06-03 | BRYNJELSEN SEAN | CEO | 5,000 | $5.96 | $29,800 | +0.5% | SEC |
| 2020-10-16 | Opaleye Management Inc. | 10% Owner | 400,000 | $7.00 | $2.8M | +11.5% | SEC |
| 2019-08-13 | BRYNJELSEN SEAN | CEO | 5,000 | $6.15 | $30,750 | +0.5% | SEC |
| 2019-08-12 | CASAMENTO CHARLES J | Director | 3,500 | $6.11 | $21,385 | +5.1% | SEC |
| 2019-05-22 | BRYNJELSEN SEAN | CEO | 10,000 | $7.93 | $79,348 | +1.0% | SEC |
| 2018-11-15 | Troutman William Wilson | CFO | 5,000 | $6.00 | $30,000 | SEC | |
| 2018-11-15 | BAUM MARK L | Director | 10,000 | $6.00 | $60,000 | SEC |
Insider sales
| Filed | Insider | Role | Shares | Avg price | Value | Type | Filing |
|---|---|---|---|---|---|---|---|
| 2026-11-10 | CASAMENTO CHARLES J | Director | -80,555 | $66.35 | $5.3M | Sale | SEC |
| 2026-08-28 | MAIER PAUL V | Director | 50,000 | $59.07 | $3.0M | Sale | SEC |
| 2026-08-24 | Krempa David | Officer | 25,000 | $65.07 | $1.6M | Sale | SEC |
| 2026-08-20 | BRYNJELSEN SEAN | CEO | 100,000 | $60.88 | $6.1M | Sale | SEC |
| 2026-07-16 | Opaleye Management Inc. | 10% Owner | 28,315 | $37.54 | $1.1M | Sale | SEC |
| 2026-07-07 | Opaleye Management Inc. | 10% Owner | 126,685 | $37.64 | $4.8M | Sale | SEC |
| 2026-06-17 | Adams Jennifer McKie | Director | 50,000 | $32.48 | $1.6M | Sale | SEC |
| 2026-05-29 | BRYNJELSEN SEAN | CEO | 120,000 | $31.88 | $3.8M | Sale | SEC |
| 2026-05-27 | Krempa David | Officer | 100,000 | $32.30 | $3.2M | Sale | SEC |
| 2025-08-20 | Gruber James R. | CFO | 41,713 | $16.15 | $673,714 | Sale | SEC |
| 2025-06-16 | Krempa David | Officer | 34,000 | $14.83 | $504,318 | Sale | SEC |
| 2025-06-05 | BRYNJELSEN SEAN | CEO | 210,000 | $17.11 | $3.6M | Sale | SEC |
| 2021-11-19 | Opaleye Management Inc. | 10% Owner | 25,000 | $4.67 | $116,750 | Sale | SEC |
| 2021-11-17 | Opaleye Management Inc. | 10% Owner | 15,438 | $4.85 | $74,849 | Sale | SEC |
| 2021-11-09 | Opaleye Management Inc. | 10% Owner | 220,362 | $6.25 | $1.4M | Sale | SEC |
Showing the latest 15 of 21 sales of $50,000+ since 2016.
Compiled automatically from public SEC filings. Not investment advice. Get every new insider purchase in the daily report.
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