Data spanning the past 90 days through February 07, 2026 reveals that Eton Pharmaceuticals's three principal insider shareholders consist of President & Ceo Sean Brynjelsen (2.89Mn shares), TenPercentOwner Health, Inc. Harrow (1.98Mn shares), Chief Business Officer David Krempa (630.24K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Sean Brynjelsen | President & Ceo | 2,889,266 | 14 Jan, 2026 |
| Health, Inc. Harrow | 1,982,000 | 12 Apr, 2021 | |
| David Krempa | Chief Business Officer | 630,238 | 14 Jan, 2026 |
| James R. Gruber | Chief Financial Officer | 213,420 | 14 Jan, 2026 |
| Management Inc. Opaleye | 85,000 | 12 Jun, 2025 | |
| Norbert G Riedel | 35,000 | 05 Feb, 2026 | |
| William Wilson Troutman | Cfo And Treasurer & Secretary | 23,027 | 20 Aug, 2021 |
| Ipek Erdogan-Trinkaus | Chief Commercial Officer | 2,403 | 12 Dec, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 03 Feb, 2026 | Norbert G Riedel | Common Stock | A | 30,000 | $4.42 | 35,000 | D | X |
| 14 Jan, 2026 | James R. Gruber | Common Stock | D | 2,293 | $15.47 | 213,420 | D | F |
| 14 Jan, 2026 | David Krempa | Common Stock | D | 1,942 | $15.62 | 630,238 | D | F |
| 01 Jan, 2026 | Sean Brynjelsen | Common Stock | D | 5,015 | $15.39 | 2,889,266 | D | F |
| 12 Dec, 2025 | Sean Brynjelsen | Common Stock | D | 6,732 | $16.83 | 2,894,281 | D | F |
| 12 Dec, 2025 | James R. Gruber | Common Stock | D | 4,542 | $16.99 | 215,713 | D | F |
| 12 Dec, 2025 | David Krempa | Common Stock | D | 6,264 | $17.00 | 632,180 | D | F |
| 12 Dec, 2025 | Ipek Erdogan-Trinkaus | Common Stock | D | 85 | $16.90 | 2,403 | D | F |
| 12 Dec, 2025 | Ipek Erdogan-Trinkaus | - | - | 2,403 | D | |||
| 20 Aug, 2025 | James R. Gruber | Common Stock | D | 2,631 | $16.02 | 204,753 | D | S |
| 19 Aug, 2025 | James R. Gruber | Common Stock | D | 39,082 | $16.16 | 205,299 | D | S |
| 16 Jun, 2025 | David Krempa | - | - | 612,646 | D | |||
| 16 Jun, 2025 | David Krempa | Common Stock | D | 10,223 | $14.73 | 612,646 | D | S |
| 13 Jun, 2025 | David Krempa | Common Stock | D | 6,800 | $14.77 | 622,869 | D | S |
| 13 Jun, 2025 | David Krempa | - | - | 622,869 | D | |||
| 12 Jun, 2025 | David Krempa | Common Stock | D | 16,977 | $14.92 | 629,669 | D | S |
| 12 Jun, 2025 | David Krempa | - | - | 629,669 | D | |||
| 10 Jun, 2025 | Management Inc. Opaleye | - | - | 2,770,000 | I | |||
| 10 Jun, 2025 | Management Inc. Opaleye | Common Stock, par value $0.001 per share | A | 5,000 | $15.82 | 2,770,000 | I | P |
| 10 Jun, 2025 | Management Inc. Opaleye | - | - | 85,000 | I |