Sean Brynjelsen
President & CEO at Eton Pharmaceuticals Inc.
Sits on 1 board. Last updated September 28, 2026
Time on boards
- Boards served
- 1
- Current seats
- 1
- Board service
- 4 years
- Director since
- 2023
4 years of board service in total across 1 board, counting each seat separately. Longest: Eton Pharmaceuticals Inc., 3 years.
Chief executive roles
Shareholder support
Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
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Eton Pharmaceuticals Inc. June 11, 202498.8%
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Aug 20, 2026 | Eton Pharmaceuticals Inc. | Open-market sale | −47,307 | $60.17 | $2,846,462 |
| Aug 20, 2026 | Eton Pharmaceuticals Inc. | Open-market sale | −36,373 | $61.11 | $2,222,754 |
| Aug 20, 2026 | Eton Pharmaceuticals Inc. | Open-market sale | −7,342 | $62.12 | $456,085 |
| Aug 19, 2026 | Eton Pharmaceuticals Inc. | Open-market sale | −8,978 | $62.65 | $562,472 |
| Jul 14, 2026 | Eton Pharmaceuticals Inc. | Option exercise | +200,000 | $1.37 | $274,000 |
| Jul 12, 2026 | Eton Pharmaceuticals Inc. | Option exercise | +27,500 | — | — |
| May 28, 2026 | Eton Pharmaceuticals Inc. | Open-market sale | −119,852 | $31.88 | $3,820,882 |
| May 28, 2026 | Eton Pharmaceuticals Inc. | Open-market sale | −148 | $32.67 | $4,835 |
| Jan 1, 2026 | Eton Pharmaceuticals Inc. | Shares withheld for tax | −5,015 | $15.39 | $77,181 |
| Dec 12, 2025 | Eton Pharmaceuticals Inc. | Shares withheld for tax | −6,732 | $16.83 | $113,300 |
| Jun 5, 2025 | Eton Pharmaceuticals Inc. | Open-market sale | −70,000 | $16.81 | $1,176,700 |
| Jun 4, 2025 | Eton Pharmaceuticals Inc. | Open-market sale | −70,000 | $17.00 | $1,190,000 |
| Jun 3, 2025 | Eton Pharmaceuticals Inc. | Open-market sale | −60,945 | $17.38 | $1,059,224 |
| Jun 3, 2025 | Eton Pharmaceuticals Inc. | Open-market sale | −8,655 | $18.38 | $159,079 |
| Jun 3, 2025 | Eton Pharmaceuticals Inc. | Open-market sale | −400 | $19.02 | $7,608 |
Questions about Sean Brynjelsen
What boards is Sean Brynjelsen on?
Sean Brynjelsen sits on the board of Eton Pharmaceuticals Inc.
What company is Sean Brynjelsen the CEO of?
Sean Brynjelsen is President & CEO of Eton Pharmaceuticals Inc.
How long has Sean Brynjelsen served on boards?
Our records show at least 4 years of board service across 1 board, the earliest from 2023.
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