Eton Pharmaceuticals, Inc. (ETON) Insider Trading
Over the last 3 months, ETON insiders made 0 open-market buys and 16 sales, a net sale of -$18.1M (SEC Form 4). Over the last 6 months, 94 institutions increased and 71 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
16
Net (3m)
-$18.1M
Insider trades by month Buys Sells
Jun
Aug
May
Jun
Jul
Aug
Context3-month price +104.3%Institutions accumulating (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Aug 31, 2026 | MAIER PAUL Vdirector | Option | 12,500 | $7.31 |
| Aug 28, 2026 | MAIER PAUL Vdirector | Option | 50,000 | $3.78 |
| Aug 28, 2026 | MAIER PAUL Vdirector | Sell | 36,387 | $58.64 |
| Aug 28, 2026 | MAIER PAUL Vdirector | Sell | 13,485 | $60.21 |
| Aug 28, 2026 | MAIER PAUL Vdirector | Sell | 128 | $61.77 |
| Aug 24, 2026 | Krempa Davidofficer: Chief Business Officer | Sell | 25,000 | $65.07 |
| Aug 24, 2026 | Krempa Davidofficer: Chief Business Officer | Option | 25,000 | $7.31 |
| Aug 20, 2026 | BRYNJELSEN SEANdirector, officer: President & CEO | Sell | 7,342 | $62.12 |
| Aug 20, 2026 | BRYNJELSEN SEANdirector, officer: President & CEO | Sell | 8,978 | $62.65 |
| Aug 20, 2026 | BRYNJELSEN SEANdirector, officer: President & CEO | Sell | 47,307 | $60.17 |
| Aug 20, 2026 | BRYNJELSEN SEANdirector, officer: President & CEO | Sell | 36,373 | $61.11 |
| Aug 4, 2026 | Adams Jennifer McKiedirector | Grant | 10,000 | — |
| Aug 4, 2026 | CASAMENTO CHARLES Jdirector | Grant | 10,000 | — |
| Aug 4, 2026 | Matthews Judith M.officer: Chief Financial Officer | Grant | 32,246 | — |
| Aug 4, 2026 | Erdogan-Trinkaus Ipekofficer: Chief Commercial Officer | Grant | 80,000 | — |
| Aug 4, 2026 | BRYNJELSEN SEANdirector, officer: President & CEO | Grant | 128,985 | — |
| Aug 4, 2026 | Krempa Davidofficer: Chief Business Officer | Grant | 128,985 | — |
| Aug 4, 2026 | MAIER PAUL Vdirector | Grant | 10,000 | — |
| Aug 4, 2026 | RIEDEL NORBERT Gdirector | Grant | 10,000 | — |
| Jul 16, 2026 | Opaleye Management Inc.10 percent owner | Sell | 15,000 | $37.54 |
| Jul 16, 2026 | Opaleye Management Inc.10 percent owner | Sell | 13,315 | $37.54 |
| Jul 14, 2026 | BRYNJELSEN SEANdirector, officer: President & CEO | Option | 27,500 | — |
| Jul 14, 2026 | BRYNJELSEN SEANdirector, officer: President & CEO | Option | 200,000 | $1.37 |
| Jul 13, 2026 | Krempa Davidofficer: Chief Business Officer | Option | 10,000 | — |
| Jul 7, 2026 | Opaleye Management Inc.10 percent owner | Sell | 20,000 | $38.37 |
| Jul 7, 2026 | Opaleye Management Inc.10 percent owner | Sell | 10,000 | $38.00 |
| Jul 7, 2026 | Opaleye Management Inc.10 percent owner | Sell | 25,000 | $37.39 |
| Jul 7, 2026 | Opaleye Management Inc.10 percent owner | Sell | 65,000 | $37.39 |
| Jul 7, 2026 | Opaleye Management Inc.10 percent owner | Sell | 6,685 | $38.37 |
| Jun 30, 2026 | Krempa Davidofficer: Chief Business Officer | Grant | 10,000 | — |
Source: ETON SEC Form 4 filings, latest Aug 31, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their ETON positions over the last 6 months (SEC Form 13F).
Increased
94
New positions
85
Reduced
71
Sold out
5
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| Opaleye Management Inc. | Unchanged | 2.9M | Aug 14, 2026 |
| OPALEYE MANAGEMENT INC. | Reduced | 2.9M | May 15, 2026 |
| ECOR1 CAPITAL, LLC | Increased | 2.2M | May 15, 2026 |
| EcoR1 Capital, LLC | Unchanged | 2.2M | Aug 14, 2026 |
| BlackRock, Inc. | Increased | 1.9M | Aug 7, 2026 |
| BLACKROCK, INC. | Reduced | 1.7M | May 13, 2026 |
| NANTAHALA CAPITAL MANAGEMENT, LLC | Unchanged | 1.2M | May 15, 2026 |
| Nantahala Capital Management, LLC | Unchanged | 1.2M | Aug 19, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 994K | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | Reduced | 977K | Aug 13, 2026 |
| MORGAN STANLEY | Increased | 768K | Aug 13, 2026 |
| STATE STREET CORP | Increased | 702K | Aug 7, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 652K | Aug 12, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 578K | May 15, 2026 |
| STATE STREET CORP | Increased | 530K | May 15, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.