ETON · Insider Trading
Eton Pharmaceutcials, Inc. Common Stock
Every open-market purchase and sale reported by ETON officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-10-06 | David Krempa | Chief Business Officer | MIXED | +6,356 | −$229.41K |
| 2026-08-31 | Paul V Maier | Director | MIXED | +12,500 | −$2.67M |
| 2026-08-28 | Paul V Maier | Director | MIXED | — | −$2.76M |
| 2026-08-24 | David Krempa | Chief Business Officer | MIXED | — | −$1.44M |
| 2026-08-20 | Sean Brynjelsen | President & CEO | Sell | −100,000 | −$6.09M |
| 2026-08-04 | David Krempa | Chief Business Officer | A | +128,985 deriv. | — |
| 2026-08-04 | Ipek Erdogan-Trinkaus | Chief Commercial Officer | A | +80,000 deriv. | — |
| 2026-08-04 | Jennifer McKie Adams | Director | A | +10,000 deriv. | — |
| 2026-08-04 | Judith M. Matthews | Chief Financial Officer | A | +32,246 deriv. | — |
| 2026-08-04 | Sean Brynjelsen | President & CEO | A | +128,985 deriv. | — |
| 2026-08-04 | Charles J Casamento | Director | A | +10,000 deriv. | — |
| 2026-08-04 | Norbert G Riedel | Director | A | +10,000 deriv. | — |
| 2026-08-04 | Paul V Maier | Director | A | +10,000 deriv. | — |
| 2026-07-17 | Opaleye Management Inc. | 10%+ Owner | Sell | −28,315 | −$1.06M |
| 2026-07-16 | Opaleye Management Inc. | 10%+ Owner | Sell | −28,315 | −$1.06M |
| 2026-07-14 | Sean Brynjelsen | President & CEO | M | +227,500 | +$274.00K |
| 2026-07-13 | David Krempa | Chief Business Officer | M | +10,000 | — |
| 2026-07-07 | Opaleye Management Inc. | 10%+ Owner | Sell | −126,685 | −$4.77M |
| 2026-06-17 | Jennifer McKie Adams | Director | MIXED | — | −$1.43M |
| 2026-05-29 | Sean Brynjelsen | President & CEO | Sell | −120,000 | −$3.83M |
| 2026-05-27 | David Krempa | Chief Business Officer | MIXED | −12,206 | −$3.03M |
| 2026-04-22 | Norbert G Riedel | Director | M | +32,155 | +$260.60K |
| 2026-02-05 | Norbert G Riedel | Director | X | +30,000 | +$132.60K |
| 2026-01-14 | Paul V Maier | Director | A | +19,953 deriv. | — |
| 2026-01-14 | Ipek Erdogan-Trinkaus | Chief Commercial Officer | A | +66,511 deriv. | — |
| 2026-01-14 | Jennifer McKie Adams | Director | A | +19,953 deriv. | — |
| 2026-01-14 | Sean Brynjelsen | President & CEO | F | −5,015 | −$77.18K |
| 2026-01-14 | David Krempa | Chief Business Officer | F | −1,942 | −$30.33K |
| 2026-01-14 | Norbert G Riedel | Director | A | +19,953 deriv. | — |
| 2026-01-14 | James R. Gruber | Chief Financial Officer | F | −2,293 | −$35.47K |
| 2026-01-14 | Charles J Casamento | Director | A | +19,953 deriv. | — |
| 2025-12-12 | Ipek Erdogan-Trinkaus | Chief Commercial Officer | F | −85 | −$1.44K |
| 2025-12-12 | Sean Brynjelsen | President & CEO | F | −6,732 | −$113.30K |
| 2025-12-12 | David Krempa | Chief Business Officer | F | −6,264 | −$106.49K |
| 2025-12-12 | James R. Gruber | Chief Financial Officer | F | −4,542 | −$77.17K |
| 2025-08-20 | James R. Gruber | Chief Financial Officer | Sell | −41,713 | −$673.71K |
| 2025-06-16 | David Krempa | Chief Business Officer | Sell | −34,000 | −$504.32K |
| 2025-06-12 | Opaleye Management Inc. | 10%+ Owner | Buy | +7,930 | +$125.48K |
| 2025-06-05 | Sean Brynjelsen | President & CEO | Sell | −210,000 | −$3.59M |
| 2025-01-06 | Jennifer McKie Adams | Director | A | +25,000 deriv. | — |
| 2025-01-06 | James R. Gruber | Chief Financial Officer | A | +64,497 deriv. | — |
| 2025-01-06 | David Krempa | Chief Business Officer | A | +64,497 deriv. | — |
| 2025-01-06 | Sean Brynjelsen | President & CEO | A | +179,473 deriv. | — |
| 2025-01-06 | Norbert G Riedel | Director | A | +25,000 deriv. | — |
| 2025-01-06 | Norbert G Riedel | Director | M | +102,400 | +$373.84K |
| 2025-01-06 | Charles J Casamento | Director | A | +25,000 deriv. | — |
| 2025-01-06 | Paul V Maier | Director | A | +25,000 deriv. | — |
| 2024-10-25 | Opaleye Management Inc. | 10%+ Owner | Buy | +10,000 | +$79.81K |
| 2024-10-08 | Opaleye Management Inc. | 10%+ Owner | Buy | +62,070 | +$434.14K |
| 2024-10-04 | David Krempa | Chief Business Officer | A | +42,088 deriv. | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Opaleye Management Inc. | 10%+ Owner | 2,665,000 | $133.70M |
| Sean Brynjelsen | President & CEO | 1,077,156 | $54.04M |
| Norbert G Riedel | Director | 224,300 | $11.25M |
| James R. Gruber | Chief Financial Officer | 213,420 | $10.71M |
| Charles J Casamento | Director | 71,920 | $3.61M |
| Paul V Maier | Director | 59,745 | $3.00M |
| Jennifer McKie Adams | Director | 50,000 | $2.51M |
| David Krempa | Chief Business Officer | 47,547 | $2.39M |
| Ipek Erdogan-Trinkaus | Chief Commercial Officer | 2,403 | $120.56K |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the ETON quote page; the site-wide leaderboard is on the insider transactions hub.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.