ETON insider trading — Eton Pharmaceuticals, Inc.
Over the last 90 days, insiders at Eton Pharmaceuticals, Inc. (ETON) made 0 open-market purchases worth $0 and 5 open-market sales worth $10.90M, making them net sellers by $10.90M. The largest sale was by Brynjelsen Sean (President & CEO), who sold 91,022 shares for $5.53M on Aug 20, 2026.
Updated Oct 16, 2026.
Recent ETON insider transactions
Every Form 4 filed by Eton Pharmaceuticals, Inc. officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Oct 6, 2026 | Krempa David | Chief Business Officer | S · Sale | Direct | 4,166 | $55.07 | $229K | Form 4 |
| Oct 2, 2026 | Krempa David | Chief Business Officer | M · Option exercise | Direct | 10,522 | — | — | Form 4 |
| Aug 28, 2026 | Maier Paul V | Director | M · Option exercise | Direct | 50,000 | $3.78 | $189K | Form 4 |
| Aug 28, 2026 | Maier Paul V | Director | S · Sale | Direct | 50,000 | $59.07 | $2.95M | Form 4 |
| Aug 24, 2026 | Krempa David | Chief Business Officer | M · Option exercise | Direct | 25,000 | $7.31 | $183K | Form 4 |
| Aug 24, 2026 | Krempa David | Chief Business Officer | S · Sale | Direct | 25,000 | $65.07 | $1.63M | Form 4 |
| Aug 20, 2026 | Brynjelsen Sean | President & CEO | S · Sale | Direct | 91,022 | $60.70 | $5.53M | Form 4 |
| Aug 19, 2026 | Brynjelsen Sean | President & CEO | S · Sale | Direct | 8,978 | $62.65 | $562K | Form 4 |
ETON insider trading FAQ
Are insiders buying ETON stock?
Not on the open market. In the last 90 days, Eton Pharmaceuticals, Inc. insiders made no open-market purchases, and 5 open-market sales totaling $10.90M. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading ETON?
Recent sellers: Brynjelsen Sean, Krempa David, Maier Paul V.
Where does ETON insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.