ETON
Eton Pharmaceuticals Inc
NASDAQ: ETON · HEALTHCARE · DRUG MANUFACTURERS - SPECIALTY & GENERIC
$30.82
-4.46% today
Updated 2026-06-02
Market cap
$889.70M
P/E ratio
—
P/S ratio
10.23x
EPS (TTM)
$-0.06
Dividend yield
—
52W range
$13 – $36
Volume
0.4M
Eton Pharmaceuticals Inc (ETON) Insider transactions
Net insider activity
Net buying (2,836,734 shares)
Buy transactions
70
Sell transactions
30
All transactions
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-04-21 | RIEDEL, NORBERT G | Director | Sale | 19,655 | — | — |
| 2026-04-21 | RIEDEL, NORBERT G | Director | Sale | 12,500 | — | — |
| 2026-04-21 | RIEDEL, NORBERT G | Director | Buy | 19,655 | $8.61 | $169229.55 |
| 2026-04-21 | RIEDEL, NORBERT G | Director | Buy | 12,500 | $7.31 | $91375.00 |
| 2026-02-03 | RIEDEL, NORBERT G | Director | Sale | 30,000 | — | — |
| 2026-02-03 | RIEDEL, NORBERT G | Director | Buy | 30,000 | $4.42 | $132600.00 |
| 2026-01-14 | KREMPA, DAVID | Chief Business Officer | Sale | 1,942 | $15.62 | $30334.04 |
| 2026-01-14 | GRUBER, JAMES R. | Chief Financial Officer | Sale | 2,293 | $15.47 | $35472.71 |
| 2026-01-12 | RIEDEL, NORBERT G | Director | Buy | 7,757 | — | — |
| 2026-01-12 | RIEDEL, NORBERT G | Director | Buy | 12,196 | — | — |
| 2026-01-12 | MAIER, PAUL V | Director | Buy | 7,757 | — | — |
| 2026-01-12 | MAIER, PAUL V | Director | Buy | 12,196 | — | — |
| 2026-01-12 | KREMPA, DAVID | Chief Business Officer | Buy | 25,856 | — | — |
| 2026-01-12 | KREMPA, DAVID | Chief Business Officer | Buy | 40,655 | — | — |
| 2026-01-12 | GRUBER, JAMES R. | Chief Financial Officer | Buy | 25,856 | — | — |
| 2026-01-12 | GRUBER, JAMES R. | Chief Financial Officer | Buy | 40,655 | — | — |
| 2026-01-12 | ERDOGAN-TRINKAUS, IPEK | Chief Commercial Officer | Buy | 25,856 | — | — |
| 2026-01-12 | ERDOGAN-TRINKAUS, IPEK | Chief Commercial Officer | Buy | 40,655 | — | — |
| 2026-01-12 | CASAMENTO, CHARLES J | Director | Buy | 7,757 | — | — |
| 2026-01-12 | CASAMENTO, CHARLES J | Director | Buy | 12,196 | — | — |
| 2026-01-12 | BRYNJELSEN, SEAN | Director, President & CEO, 10% Owner | Buy | 100,517 | — | — |
| 2026-01-12 | BRYNJELSEN, SEAN | Director, President & CEO, 10% Owner | Buy | 158,046 | — | — |
| 2026-01-12 | ADAMS, JENNIFER MCKIE | Director | Buy | 7,757 | — | — |
| 2026-01-12 | ADAMS, JENNIFER MCKIE | Director | Buy | 12,196 | — | — |
| 2026-01-01 | BRYNJELSEN, SEAN | Director, President & CEO, 10% Owner | Sale | 5,015 | $15.39 | $77180.85 |
| 2025-12-12 | KREMPA, DAVID | Chief Business Officer | Sale | 6,264 | $17.00 | $106488.00 |
| 2025-12-12 | GRUBER, JAMES R. | Chief Financial Officer | Sale | 4,542 | $16.99 | $77168.58 |
| 2025-12-12 | ERDOGAN-TRINKAUS, IPEK | Chief Commercial Officer | Sale | 85 | $16.90 | $1436.50 |
| 2025-12-12 | BRYNJELSEN, SEAN | Director, President & CEO, 10% Owner | Sale | 6,732 | $16.83 | $113299.56 |
| 2025-12-11 | KREMPA, DAVID | Chief Business Officer | Buy | 5,300 | — | — |
| 2025-12-11 | GRUBER, JAMES R. | Chief Financial Officer | Buy | 5,502 | — | — |
| 2025-08-20 | GRUBER, JAMES R. | Chief Financial Officer | Sale | 2,631 | $16.02 | $42148.62 |
| 2025-08-19 | GRUBER, JAMES R. | Chief Financial Officer | Sale | 39,082 | $16.16 | $631565.12 |
| 2025-06-16 | KREMPA, DAVID | Chief Business Officer | Sale | 10,223 | $14.73 | $150584.79 |
| 2025-06-13 | KREMPA, DAVID | Chief Business Officer | Sale | 6,800 | $14.77 | $100436.00 |
| 2025-06-12 | KREMPA, DAVID | Chief Business Officer | Sale | 16,977 | $14.92 | $253296.84 |
| 2025-06-10 | OPALEYE, MANAGEMENT INC. | 10% Owner | Buy | 5,000 | $15.82 | $79119.50 |
| 2025-06-10 | OPALEYE, MANAGEMENT INC. | 10% Owner | Buy | 2,930 | $15.82 | $46364.03 |
| 2025-06-05 | BRYNJELSEN, SEAN | Director, President & CEO, 10% Owner | Sale | 70,000 | $16.81 | $1.18M |
| 2025-06-04 | BRYNJELSEN, SEAN | Director, President & CEO, 10% Owner | Sale | 70,000 | $17.00 | $1.19M |
| 2025-06-03 | BRYNJELSEN, SEAN | Director, President & CEO, 10% Owner | Sale | 60,945 | $17.38 | $1.06M |
| 2025-06-03 | BRYNJELSEN, SEAN | Director, President & CEO, 10% Owner | Sale | 8,655 | $18.38 | $159078.90 |
| 2025-06-03 | BRYNJELSEN, SEAN | Director, President & CEO, 10% Owner | Sale | 400 | $19.02 | $7608.00 |
| 2025-01-03 | RIEDEL, NORBERT G | Director | Sale | 50,000 | — | — |
| 2025-01-03 | RIEDEL, NORBERT G | Director | Sale | 27,400 | — | — |
| 2025-01-03 | RIEDEL, NORBERT G | Director | Buy | 25,000 | — | — |
| 2025-01-03 | RIEDEL, NORBERT G | Director | Buy | 50,000 | $3.78 | $189000.00 |
| 2025-01-03 | RIEDEL, NORBERT G | Director | Buy | 27,400 | $3.58 | $98092.00 |
| 2025-01-03 | RIEDEL, NORBERT G | Director | Buy | 25,000 | $3.47 | $86750.00 |
| 2025-01-03 | MAIER, PAUL V | Director | Buy | 25,000 | — | — |
| 2025-01-03 | KREMPA, DAVID | Chief Business Officer | Buy | 25,876 | — | — |
| 2025-01-03 | KREMPA, DAVID | Chief Business Officer | Buy | 38,621 | — | — |
| 2025-01-03 | GRUBER, JAMES R. | Chief Financial Officer | Buy | 25,876 | — | — |
| 2025-01-03 | GRUBER, JAMES R. | Chief Financial Officer | Buy | 38,621 | — | — |
| 2025-01-03 | CASAMENTO, CHARLES J | Director | Buy | 25,000 | — | — |
| 2025-01-03 | BRYNJELSEN, SEAN | Director, President & CEO | Buy | 72,004 | — | — |
| 2025-01-03 | BRYNJELSEN, SEAN | Director, President & CEO | Buy | 107,469 | — | — |
| 2025-01-03 | ADAMS, JENNIFER MCKIE | Director | Buy | 25,000 | — | — |
| 2024-10-23 | OPALEYE, MANAGEMENT INC. | 10% Owner | Buy | 10,000 | $7.98 | $79814.00 |
| 2024-10-08 | OPALEYE, MANAGEMENT INC. | 10% Owner | Buy | 30,000 | $7.03 | $210876.00 |
| 2024-10-08 | OPALEYE, MANAGEMENT INC. | 10% Owner | Buy | 3,970 | $7.03 | $27905.92 |
| 2024-10-07 | OPALEYE, MANAGEMENT INC. | 10% Owner | Buy | 10,000 | $7.22 | $72235.00 |
| 2024-10-07 | OPALEYE, MANAGEMENT INC. | 10% Owner | Buy | 1,248 | $7.22 | $9014.93 |
| 2024-10-04 | OPALEYE, MANAGEMENT INC. | 10% Owner | Buy | 15,000 | $6.77 | $101565.00 |
| 2024-10-04 | OPALEYE, MANAGEMENT INC. | 10% Owner | Buy | 1,852 | $6.77 | $12539.89 |
| 2024-10-02 | KREMPA, DAVID | Chief Business Officer | Buy | 42,088 | — | — |
| 2024-09-11 | OPALEYE, MANAGEMENT INC. | 10% Owner | Buy | 45,000 | $4.75 | $213750.00 |
| 2024-09-11 | OPALEYE, MANAGEMENT INC. | 10% Owner | Buy | 5,000 | $4.75 | $23750.00 |
| 2024-09-10 | OPALEYE, MANAGEMENT INC. | 10% Owner | Buy | 50,000 | $4.65 | $232500.00 |
| 2024-09-10 | OPALEYE, MANAGEMENT INC. | 10% Owner | Buy | 7,500 | $4.65 | $34875.00 |
| 2024-02-13 | RIEDEL, NORBERT G | Director | Buy | 30,000 | — | — |
| 2024-02-13 | MAIER, PAUL V | Director | Buy | 30,000 | — | — |
| 2024-02-13 | KREMPA, DAVID | Chief Business Officer | Buy | 144,677 | — | — |
| 2024-02-13 | GRUBER, JAMES R. | Chief Financial Officer | Buy | 144,677 | — | — |
| 2024-02-13 | CASAMENTO, CHARLES J | Director | Buy | 30,000 | — | — |
| 2024-02-13 | BRYNJELSEN, SEAN | Director, President & CEO | Buy | 438,633 | — | — |
| 2024-02-13 | ADAMS, JENNIFER MCKIE | Director | Buy | 30,000 | — | — |
| 2023-03-03 | RIEDEL, NORBERT G | Director | Buy | 25,000 | — | — |
| 2023-03-03 | MAIER, PAUL V | Director | Buy | 25,000 | — | — |
| 2023-03-03 | GRUBER, JAMES R. | Chief Financial Officer | Buy | 100,086 | — | — |
| 2023-03-03 | CASAMENTO, CHARLES J | Director | Buy | 25,000 | — | — |
| 2023-03-03 | BRYNJELSEN, SEAN | Director, President & CEO | Buy | 350,381 | — | — |
| 2023-03-03 | ADAMS, JENNIFER MCKIE | Director | Buy | 25,000 | — | — |
| 2022-09-22 | BRYNJELSEN, SEAN | Director, Chief Executive Officer | Buy | 10,000 | $2.10 | $21042.00 |
| 2022-07-12 | GRUBER, JAMES R. | Chief Financial Officer | Buy | 40,000 | — | — |
| 2022-07-12 | BRYNJELSEN, SEAN | Chief Executive Officer | Buy | 110,000 | — | — |
| 2022-02-07 | TROUTMAN, WILLIAM WILSON | CFO and Secretary | Buy | 15,000 | — | — |
| 2022-02-07 | RIEDEL, NORBERT G | Director | Buy | 50,000 | — | — |
| 2022-02-07 | MAIER, PAUL V | Director | Buy | 50,000 | — | — |
| 2022-02-07 | CASAMENTO, CHARLES J | Director | Buy | 50,000 | — | — |
| 2022-02-07 | BRYNJELSEN, SEAN | Director, President & CEO | Buy | 416,500 | — | — |
| 2022-02-07 | ADAMS, JENNIFER MCKIE | Director | Buy | 50,000 | — | — |
| 2021-11-17 | OPALEYE, MANAGEMENT INC. | 10% Owner | Sale | 25,000 | $4.67 | $116712.50 |
| 2021-11-16 | OPALEYE, MANAGEMENT INC. | 10% Owner | Sale | 11,500 | $4.86 | $55911.85 |
| 2021-11-16 | OPALEYE, MANAGEMENT INC. | 10% Owner | Sale | 938 | $4.86 | $4560.46 |
| 2021-11-15 | OPALEYE, MANAGEMENT INC. | 10% Owner | Sale | 2,500 | $4.80 | $12004.00 |
| 2021-11-15 | OPALEYE, MANAGEMENT INC. | 10% Owner | Sale | 500 | $4.80 | $2400.80 |
| 2021-11-08 | OPALEYE, MANAGEMENT INC. | 10% Owner | Sale | 50,000 | $6.10 | $305050.00 |
| 2021-11-08 | OPALEYE, MANAGEMENT INC. | 10% Owner | Sale | 2,661 | $6.10 | $16234.76 |
| 2021-11-05 | OPALEYE, MANAGEMENT INC. | 10% Owner | Sale | 159,300 | $6.30 | $1.00M |
Frequently asked questions
Are ETON insiders buying or selling?
Over the transactions on record, ETON insiders have been net buyers, with about $6.73M in stock sold across 30 sales, against 20 open-market purchases.
Does insider selling at ETON mean the stock will fall?
Not by itself. Most executive selling is pre-scheduled through 10b5-1 plans filed months in advance, and insiders sell for diversification, taxes, and liquidity far more often than out of any view on the price. Insider buying is the stronger signal, especially when several insiders buy around the same time, because there is usually only one reason to put personal cash into the stock.
Which ETON insiders are selling the most?
Recent selling is concentrated in a few names. BRYNJELSEN, SEAN accounts for the largest share on record, with about $3.78M sold. Selling by one or two individuals matters less than broad selling across the whole leadership team, which is the pattern worth watching.