ETON: Eton Pharmaceuticals, Inc. insider trading, 5% holders and institutional ownership
From public SEC filings: open-market insider purchases and sales (Form 4, last 180 days), holders of 5% or more (Schedules 13D and 13G) and institutional ownership (Form 13F). Insider and 5% data delayed 48 hours.
Insider trading
0 open-market buys totaling - and 1 sales totaling $229K in the last 180 days.
Insider sales
| Trade date | Insider | Role | Value | 10b5-1 plan |
|---|---|---|---|---|
| 2026-10-06 | Krempa David | Officer | $229K |
Activist and 5% holders
| Filed | What | Holder | Stake | Change | Filing |
|---|---|---|---|---|---|
| 2026-07-28 | 13G amendment | BlackRock, Inc. | 6.90% | SEC |
Institutional ownership (Q2 2026)
164 institutions reported holding $753.85M of Eton Pharmaceuticals, Inc. on Form 13F (116 the quarter before). 54 opened a new position and 5 sold out. Shares held by institutions: +19%.
| Largest holders | Shares | Value |
|---|---|---|
| Opaleye Management Inc. | 2,860,000 | $103.53M |
| Nantahala Capital Management, LLC | 2,351,902 | $85.14M |
| EcoR1 Capital, LLC | 2,171,938 | $78.62M |
| BlackRock, Inc. | 1,895,833 | $68.63M |
| VANGUARD CAPITAL MANAGEMENT LLC | 976,570 | $35.35M |
| MORGAN STANLEY | 767,972 | $27.80M |
| STATE STREET CORP | 701,786 | $25.40M |
| GEODE CAPITAL MANAGEMENT, LLC | 652,303 | $23.62M |
| OBERWEIS ASSET MANAGEMENT INC/ | 501,600 | $18.16M |
| National Philanthropic Trust | 492,112 | $17.81M |
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