Eton Pharmaceuticals, Inc. (ETON) Insider Trading
Over the last 3 months, ETON insiders made 0 open-market buys and 8 sales, a net sale of -$8.7M (SEC Form 4). Over the last 6 months, 65 institutions increased and 72 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
8
Net (3m)
-$8.7M
Insider trades by month Buys Sells
Sep
Oct
Jun
Aug
May
Jun
Context3-month price +45.8%Institutions mixed (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Jun 17, 2026 | Adams Jennifer McKiedirector | Sell | 50,000 | $32.48 |
| Jun 17, 2026 | Adams Jennifer McKiedirector | Option | 50,000 | $3.78 |
| May 29, 2026 | BRYNJELSEN SEANdirector, officer: President & CEO | Sell | 119,852 | $31.88 |
| May 29, 2026 | BRYNJELSEN SEANdirector, officer: President & CEO | Sell | 148 | $32.67 |
| May 27, 2026 | Krempa Davidofficer: Chief Business Officer | Option | 30,591 | $3.58 |
| May 27, 2026 | Krempa Davidofficer: Chief Business Officer | Sell | 32,963 | $33.22 |
| May 27, 2026 | Krempa Davidofficer: Chief Business Officer | Sell | 9,315 | $33.88 |
| May 27, 2026 | Krempa Davidofficer: Chief Business Officer | Option | 12,476 | $1.37 |
| May 27, 2026 | Krempa Davidofficer: Chief Business Officer | Option | 7,203 | $3.58 |
| May 27, 2026 | Krempa Davidofficer: Chief Business Officer | Sell | 19,679 | $31.47 |
| May 27, 2026 | Krempa Davidofficer: Chief Business Officer | Option | 25,000 | $1.38 |
| May 27, 2026 | Krempa Davidofficer: Chief Business Officer | Sell | 519 | $35.00 |
| May 27, 2026 | Krempa Davidofficer: Chief Business Officer | Option | 12,524 | $1.37 |
| May 27, 2026 | Krempa Davidofficer: Chief Business Officer | Sell | 37,524 | $31.49 |
| Apr 22, 2026 | RIEDEL NORBERT Gdirector | Option | 12,500 | $7.31 |
| Apr 22, 2026 | RIEDEL NORBERT Gdirector | Option | 19,655 | $8.61 |
| Jan 14, 2026 | BRYNJELSEN SEANdirector, 10 percent owner, officer: President & CEO | Tax | 5,015 | $15.39 |
| Jan 14, 2026 | CASAMENTO CHARLES Jdirector | Grant | 7,757 | — |
| Jan 14, 2026 | CASAMENTO CHARLES Jdirector | Grant | 12,196 | $15.47 |
| Jan 14, 2026 | MAIER PAUL Vdirector | Grant | 7,757 | — |
| Jan 14, 2026 | MAIER PAUL Vdirector | Grant | 12,196 | $15.47 |
| Jan 14, 2026 | Erdogan-Trinkaus Ipekofficer: Chief Commercial Officer | Grant | 25,856 | — |
| Jan 14, 2026 | Erdogan-Trinkaus Ipekofficer: Chief Commercial Officer | Grant | 40,655 | $15.47 |
| Jan 14, 2026 | BRYNJELSEN SEANdirector, 10 percent owner, officer: President & CEO | Grant | 100,517 | — |
| Jan 14, 2026 | BRYNJELSEN SEANdirector, 10 percent owner, officer: President & CEO | Grant | 158,046 | $15.47 |
| Jan 14, 2026 | Krempa Davidofficer: Chief Business Officer | Grant | 25,856 | — |
| Jan 14, 2026 | Krempa Davidofficer: Chief Business Officer | Grant | 40,655 | $15.47 |
| Jan 14, 2026 | Krempa Davidofficer: Chief Business Officer | Tax | 1,942 | $15.62 |
| Jan 14, 2026 | Gruber James R.officer: Chief Financial Officer | Grant | 25,856 | — |
| Jan 14, 2026 | Gruber James R.officer: Chief Financial Officer | Grant | 40,655 | $15.47 |
Source: ETON SEC Form 4 filings, latest Jun 17, 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
65
New positions
50
Reduced
72
Sold out
37
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| OPALEYE MANAGEMENT INC. | Reduced | 2.9M | May 15, 2026 |
| OPALEYE MANAGEMENT INC. | Unchanged | 2.9M | Feb 17, 2026 |
| ECOR1 CAPITAL, LLC | Increased | 2.2M | May 15, 2026 |
| ECOR1 CAPITAL, LLC | Unchanged | 2.0M | Feb 17, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 2.0M | May 15, 2026 |
| BLACKROCK, INC. | Increased | 1.7M | Feb 12, 2026 |
| BLACKROCK, INC. | Reduced | 1.7M | May 13, 2026 |
| VANGUARD GROUP INC | Increased | 1.3M | Jan 29, 2026 |
| NANTAHALA CAPITAL MANAGEMENT, LLC | Unchanged | 1.2M | May 15, 2026 |
| NANTAHALA CAPITAL MANAGEMENT, LLC | Unchanged | 1.2M | Feb 13, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 578K | May 15, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | 565K | Feb 9, 2026 |
| STATE STREET CORP | Increased | 530K | May 15, 2026 |
| STATE STREET CORP | Increased | 502K | Feb 13, 2026 |
| MORGAN STANLEY | Reduced | 494K | Feb 13, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.