As of May 14, 2026, Eton Pharmaceuticals's top three insider holders are Sean Brynjelsen (President Ceo, 2.89Mn shares), Management Inc. Opaleye (TenPercentOwner, 2.85Mn shares), David Krempa (Chief Business Officer, 630.24K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Sean Brynjelsen | President Ceo | 2,889,266 | 0 | 14 Jan, 2026 |
| Management Inc. Opaleye | - | 0 | 2,855,000 | 12 Jun, 2025 |
| David Krempa | Chief Business Officer | 630,238 | 0 | 14 Jan, 2026 |
| David Krempa | Chief Business Officer | 630,238 | 0 | 14 Jan, 2026 |
| James R. Gruber | Chief Financial Officer | 213,420 | 0 | 14 Jan, 2026 |
| James R. Gruber | Chief Financial Officer | 213,420 | 0 | 14 Jan, 2026 |
| Management Inc. Opaleye | - | 0 | 85,000 | 17 Nov, 2021 |
| Management Inc. Opaleye | - | 0 | 82,070 | 08 Oct, 2024 |
| Norbert G Riedel | - | 67,155 | 0 | 22 Apr, 2026 |
| Norbert G Riedel | - | 35,000 | 0 | 05 Feb, 2026 |
| William Wilson Troutman | Cfo, Treasurer Secretary | 23,027 | 0 | 20 Aug, 2021 |
| William Wilson Troutman | Cfo, Treasurer Secretary | 23,027 | 0 | 20 Aug, 2021 |
| Ipek Erdogan-Trinkaus | Chief Commercial Officer | 2,403 | 0 | 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 |
|---|---|---|---|---|---|---|---|---|
| 21 Apr, 2026 | Norbert G Riedel | Common Stock | A | 12,500 | $7.31 | 47,500 | D | M |
| 21 Apr, 2026 | Norbert G Riedel | Common Stock | A | 12,500 | $7.31 | 47,500 | D | M |
| 21 Apr, 2026 | Norbert G Riedel | Common Stock | A | 12,500 | $7.31 | 47,500 | D | M |
| 21 Apr, 2026 | Norbert G Riedel | Common Stock | A | 12,500 | $7.31 | 47,500 | D | M |
| 21 Apr, 2026 | Norbert G Riedel | Common Stock | A | 12,500 | $7.31 | 47,500 | D | M |
| 21 Apr, 2026 | Norbert G Riedel | Common Stock | A | 19,655 | $8.61 | 67,155 | D | M |
| 21 Apr, 2026 | Norbert G Riedel | Common Stock | A | 19,655 | $8.61 | 67,155 | D | M |
| 21 Apr, 2026 | Norbert G Riedel | Common Stock | A | 19,655 | $8.61 | 67,155 | D | M |
| 21 Apr, 2026 | Norbert G Riedel | Common Stock | A | 19,655 | $8.61 | 67,155 | D | M |
| 21 Apr, 2026 | Norbert G Riedel | Common Stock | A | 19,655 | $8.61 | 67,155 | D | M |
| 21 Apr, 2026 | Norbert G Riedel | Employee Stock Option (Right to Buy) | D | 12,500 | $0.00 | 0 | D | M |
| 21 Apr, 2026 | Norbert G Riedel | Employee Stock Option (Right to Buy) | D | 12,500 | $0.00 | 0 | D | M |
| 21 Apr, 2026 | Norbert G Riedel | Employee Stock Option (Right to Buy) | D | 12,500 | $0.00 | 0 | D | M |
| 21 Apr, 2026 | Norbert G Riedel | Employee Stock Option (Right to Buy) | D | 12,500 | $0.00 | 0 | D | M |
| 21 Apr, 2026 | Norbert G Riedel | Employee Stock Option (Right to Buy) | D | 12,500 | $0.00 | 0 | D | M |
| 21 Apr, 2026 | Norbert G Riedel | Employee Stock Option (Right to Buy) | D | 19,655 | $0.00 | 0 | D | M |
| 21 Apr, 2026 | Norbert G Riedel | Employee Stock Option (Right to Buy) | D | 19,655 | $0.00 | 0 | D | M |
| 21 Apr, 2026 | Norbert G Riedel | Employee Stock Option (Right to Buy) | D | 19,655 | $0.00 | 0 | D | M |
| 21 Apr, 2026 | Norbert G Riedel | Employee Stock Option (Right to Buy) | D | 19,655 | $0.00 | 0 | D | M |
| 21 Apr, 2026 | Norbert G Riedel | Employee Stock Option (Right to Buy) | D | 19,655 | $0.00 | 0 | D | M |