Eton Pharmaceuticals, Inc. (ETON) · Insider trading
What Eton Pharmaceuticals's directors, officers and largest holders bought and sold themselves, from the Form 4 each of them files with the SEC within two business days of a trade. Open-market purchases and sales first: those are the trades somebody chose to make at the market price.
Bought, 12 months
$0
0 insiders, 0 trades
Sold, 12 months
$25.41M
5 insiders, 0% under a plan
Net, 12 months
−$25.41M
bought less sold
Latest filing
2026-10-06
filings read to 2026-10-19
Who traded, two years
| Insider | Bought | Sold | Trades | Last trade | Holds after |
|---|---|---|---|---|---|
| Brynjelsen SeanDirector, President & CEO | – | $13.51M | 11 | 2026-08-20 | 1,004,909 |
| Opaleye Management Inc.10% owner | $205,253 | $5.83M | 10 | 2026-07-14 | – |
| Krempa DavidChief Business Officer | – | $5.59M | 10 | 2026-10-06 | 43,381 |
| Maier Paul VDirector | – | $2.95M | 3 | 2026-08-28 | 73,358 |
| Adams Jennifer McKieDirector | – | $1.62M | 1 | 2026-06-17 | 0 |
| Gruber James R.Chief Financial Officer | – | $673,714 | 2 | 2025-08-20 | 204,753 |
Open-market purchases and sales
Newest first. “Plan” marks a trade made under a 10b5-1 plan set up in advance.
| Date | Insider | Trade | Shares | Price | Value | Holds after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-10-06 | Krempa DavidChief Business Officer | Sale | 4,166 | 55.07 | $229,406 | 43,381 | Form 4 |
| 2026-08-28 | Maier Paul VDirector | Sale | 36,387 | 58.64 | $2.13M | 73,358 | Form 4/A |
| 2026-08-28 | Maier Paul VDirector | Sale | 13,485 | 60.21 | $811,932 | 59,873 | Form 4/A |
| 2026-08-28 | Maier Paul VDirector | Sale | 128 | 61.77 | $7,907 | 59,745 | Form 4/A |
| 2026-08-24 | Krempa DavidChief Business Officer | Sale | 25,000 | 65.07 | $1.63M | 37,025 | Form 4 |
| 2026-08-20 | Brynjelsen SeanDirector, President & CEO | Sale | 47,307 | 60.17 | $2.85M | 1,004,909 | Form 4 |
| 2026-08-20 | Brynjelsen SeanDirector, President & CEO | Sale | 36,373 | 61.11 | $2.22M | 968,536 | Form 4 |
| 2026-08-20 | Brynjelsen SeanDirector, President & CEO | Sale | 7,342 | 62.12 | $456,085 | 961,194 | Form 4 |
| 2026-08-19 | Brynjelsen SeanDirector, President & CEO | Sale | 8,978 | 62.65 | $562,472 | 1,052,216 | Form 4 |
| 2026-07-14 | Opaleye Management Inc.10% owner | Saleindirect | 15,000 | 37.54 | $563,100 | 2,665,000 | Form 4/A |
| 2026-07-14 | Opaleye Management Inc.10% owner | Saleindirect | 13,315 | 37.54 | $499,845 | 40,000 | Form 4/A |
| 2026-07-07 | Opaleye Management Inc.10% owner | Saleindirect | 20,000 | 38.37 | $767,400 | 2,680,000 | Form 4 |
| 2026-07-07 | Opaleye Management Inc.10% owner | Saleindirect | 6,685 | 38.37 | $256,503 | 53,315 | Form 4 |
| 2026-07-06 | Opaleye Management Inc.10% owner | Saleindirect | 10,000 | 38.00 | $380,000 | 2,700,000 | Form 4 |
| 2026-07-02 | Opaleye Management Inc.10% owner | Saleindirect | 65,000 | 37.39 | $2.43M | 2,710,000 | Form 4 |
| 2026-07-02 | Opaleye Management Inc.10% owner | Saleindirect | 25,000 | 37.39 | $934,750 | 60,000 | Form 4 |
| 2026-06-17 | Adams Jennifer McKieDirector | Sale | 50,000 | 32.48 | $1.62M | 0 | Form 4 |
| 2026-05-28 | Brynjelsen SeanDirector, President & CEO | Sale | 119,852 | 31.88 | $3.82M | 833,842 | Form 4 |
| 2026-05-28 | Brynjelsen SeanDirector, President & CEO | Sale | 148 | 32.67 | $4,835 | 833,694 | Form 4 |
| 2026-05-27 | Krempa DavidChief Business Officer | Sale | 19,679 | 31.47 | $619,298 | 25,249 | Form 4 |
| 2026-05-26 | Krempa DavidChief Business Officer | Sale | 37,524 | 31.49 | $1.18M | 25,249 | Form 4 |
| 2026-05-22 | Krempa DavidChief Business Officer | Sale | 32,963 | 33.22 | $1.10M | 35,083 | Form 4 |
| 2026-05-22 | Krempa DavidChief Business Officer | Sale | 9,315 | 33.88 | $315,592 | 25,768 | Form 4 |
| 2026-05-22 | Krempa DavidChief Business Officer | Sale | 519 | 35.00 | $18,165 | 25,249 | Form 4 |
| 2025-08-20 | Gruber James R.Chief Financial Officer | Sale | 2,631 | 16.02 | $42,149 | 204,753 | Form 4 |
| 2025-08-19 | Gruber James R.Chief Financial Officer | Sale | 39,082 | 16.16 | $631,565 | 205,299 | Form 4 |
| 2025-06-16 | Krempa DavidChief Business Officer | Sale | 10,223 | 14.73 | $150,585 | 612,646 | Form 4 |
| 2025-06-13 | Krempa DavidChief Business Officer | Sale | 6,800 | 14.77 | $100,436 | 622,869 | Form 4 |
| 2025-06-12 | Krempa DavidChief Business Officer | Sale | 16,977 | 14.92 | $253,297 | 629,669 | Form 4 |
| 2025-06-10 | Opaleye Management Inc.10% owner | Buyindirect | 5,000 | 15.82 | $79,100 | 2,770,000 | Form 4 |
| 2025-06-10 | Opaleye Management Inc.10% owner | Buyindirect | 2,930 | 15.82 | $46,353 | 85,000 | Form 4 |
| 2025-06-05 | Brynjelsen SeanDirector, President & CEO, 10% owner | Sale | 70,000 | 16.81 | $1.18M | 2,873,513 | Form 4 |
| 2025-06-04 | Brynjelsen SeanDirector, President & CEO, 10% owner | Sale | 70,000 | 17.00 | $1.19M | 2,943,513 | Form 4 |
| 2025-06-03 | Brynjelsen SeanDirector, President & CEO, 10% owner | Sale | 60,945 | 17.38 | $1.06M | 3,022,568 | Form 4 |
| 2025-06-03 | Brynjelsen SeanDirector, President & CEO, 10% owner | Sale | 8,655 | 18.38 | $159,079 | 3,013,913 | Form 4 |
| 2025-06-03 | Brynjelsen SeanDirector, President & CEO, 10% owner | Sale | 400 | 19.02 | $7,608 | 3,013,513 | Form 4 |
| 2024-10-23 | Opaleye Management Inc.10% owner | Buyindirect | 10,000 | 7.98 | $79,800 | 2,770,000 | Form 4 |
Grants, exercises and other transactions
Pay, tax and paperwork rather than a choice to trade at the market price. Two years.
18 × option exercise7 × shares withheld for tax1 × option exercise
Show them
| Date | Insider | What | Shares | Price | Holds after | Filing |
|---|---|---|---|---|---|---|
| 2026-10-02 | Krempa DavidChief Business Officer | Option exercise M | +10,522 | – | 47,547 | Form 4 |
| 2026-08-28 | Maier Paul VDirector | Option exercise M | +50,000 | 3.78 | 109,745 | Form 4/A |
| 2026-08-28 | Maier Paul VDirector | Option exercise M | +12,500 | 7.31 | 72,245 | Form 4/A |
| 2026-08-24 | Krempa DavidChief Business Officer | Option exercise M | +25,000 | 7.31 | 62,025 | Form 4 |
| 2026-07-14 | Brynjelsen SeanDirector, President & CEO | Option exercise M | +200,000 | 1.37 | 1,061,194 | Form 4 |
| 2026-07-12 | Brynjelsen SeanDirector, President & CEO | Option exercise M | +27,500 | – | 861,194 | Form 4 |
| 2026-07-12 | Krempa DavidChief Business Officer | Option exercise M | +10,000 | – | 37,025 | Form 4 |
| 2026-06-17 | Adams Jennifer McKieDirector | Option exercise M | +50,000 | 3.78 | 50,000 | Form 4 |
| 2026-05-27 | Krempa DavidChief Business Officer | Option exercise M | +12,476 | 1.37 | 37,725 | Form 4 |
| 2026-05-27 | Krempa DavidChief Business Officer | Option exercise M | +7,203 | 3.58 | 44,928 | Form 4 |
| 2026-05-26 | Krempa DavidChief Business Officer | Option exercise M | +25,000 | 1.38 | 50,249 | Form 4 |
| 2026-05-26 | Krempa DavidChief Business Officer | Option exercise M | +12,524 | 1.37 | 62,773 | Form 4 |
| 2026-05-22 | Krempa DavidChief Business Officer | Option exercise M | +30,591 | 3.58 | 68,046 | Form 4 |
| 2026-04-21 | Riedel Norbert GDirector | Option exercise M | +12,500 | 7.31 | 47,500 | Form 4 |
| 2026-04-21 | Riedel Norbert GDirector | Option exercise M | +19,655 | 8.61 | 67,155 | Form 4 |
| 2026-02-03 | Riedel Norbert GDirector | Option exercise X | +30,000 | 4.42 | 35,000 | Form 4 |
| 2026-01-14 | Gruber James R.Chief Financial Officer | Shares withheld for tax F | −2,293 | 15.47 | 213,420 | Form 4 |
| 2026-01-14 | Krempa DavidChief Business Officer | Shares withheld for tax F | −1,942 | 15.62 | 630,238 | Form 4 |
| 2026-01-01 | Brynjelsen SeanDirector, President & CEO, 10% owner | Shares withheld for tax F | −5,015 | 15.39 | 2,889,266 | Form 4 |
| 2025-12-12 | Brynjelsen SeanDirector, President & CEO, 10% owner | Shares withheld for tax F | −6,732 | 16.83 | 2,894,281 | Form 4 |
| 2025-12-12 | Gruber James R.Chief Financial Officer | Shares withheld for tax F | −4,542 | 16.99 | 215,713 | Form 4 |
| 2025-12-12 | Krempa DavidChief Business Officer | Shares withheld for tax F | −6,264 | 17.00 | 632,180 | Form 4 |
| 2025-12-12 | Erdogan-Trinkaus IpekChief Commercial Officer | Shares withheld for tax F | −85 | 16.90 | 2,403 | Form 4 |
| 2025-01-03 | Riedel Norbert GDirector | Option exercise M | +27,400 | 3.58 | 87,145 | Form 4 |
| 2025-01-03 | Riedel Norbert GDirector | Option exercise M | +50,000 | 3.78 | 137,145 | Form 4 |
| 2025-01-03 | Riedel Norbert GDirector | Option exercise M | +25,000 | 3.47 | 162,145 | Form 4 |
How to read it
- Buy, sale
- Code P and S on the form: shares bought or sold in the market, at the market price. The other codes are mostly pay (a grant, an option exercised) or tax (shares the company withheld), and say little about what the insider thinks of the price.
- Plan
- A sale or purchase under a Rule 10b5-1 plan, set up in advance and running on its own schedule. Since April 2023 the form has a box for it. Much executive selling is planned and says more about diversifying than about the company.
- Holds after
- The shares the insider still held after the trade, in the form the trade was in (directly, or indirectly through a trust or a fund).
- Value
- Shares times the price the form reports, which is often an average over several fills on the day.
Read from the SEC's own quarterly data sets of Forms 3, 4 and 5, and from each day's filings since the last one. A correcting amendment replaces the lines it restates. Every row links to its filing. None of this is advice: insiders sell for many reasons, and buy for fewer.