Who owns Eton Pharmaceuticals, Inc.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of ETON from SEC Form 13F filings across 164 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 164 institutions disclosed 20.0M shares of Eton Pharmaceuticals, Inc. worth $722.6M — about 72.2% of shares outstanding; the largest disclosed holder is Opaleye Management Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.
164
13F holders
$722.6M
value, 2026 filers
72.2%
of shares outstanding (20.0M sh)
54
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of ETON's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | Opaleye Management Inc. | 2.9M | $103.5M | 9.4% | 10.3% | 0.0% |
| 2 | EcoR1 Capital, LLC | 2.2M | $78.6M | 3.8% | 7.9% | 0.0% |
| 3 | BlackRock, Inc. | 1.9M | $68.6M | 0.0% | 6.9% | +10.4% |
| 4 | Nantahala Capital Management, LLC | 1.2M | $42.6M | 1.4% | 4.3% | 0.0% |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 976,570 | $35.4M | 0.0% | 3.5% | -1.8% |
| 6 | MORGAN STANLEY | 767,972 | $27.8M | 0.0% | 2.8% | +60.7% |
| 7 | STATE STREET CORP | 701,786 | $25.4M | 0.0% | 2.5% | +32.4% |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | 652,303 | $23.6M | 0.0% | 2.4% | +12.9% |
| 9 | OBERWEIS ASSET MANAGEMENT INC/ | 501,600 | $18.2M | 0.4% | 1.8% | +14.2% |
| 10 | National Philanthropic Trust | 492,112 | $17.8M | 0.3% | 1.8% | 0.0% |
| 11 | Westside Investment Management, Inc. | 431,160 | $15.6M | 2.1% | 1.6% | -7.9% |
| 12 | Pillsbury Lake Capital LLC | 387,157 | $14.0M | 3.8% | 1.4% | +6.1% |
| 13 | Nuveen, LLC | 375,707 | $13.6M | 0.0% | 1.4% | +548.3% |
| 14 | BNP PARIBAS FINANCIAL MARKETS | 322,466 | $11.7M | 0.0% | 1.2% | +6.7% |
| 15 | Woodline Partners LP | 310,879 | $11.3M | 0.0% | 1.1% | +82.1% |
| 16 | THOMPSON SIEGEL & WALMSLEY LLC | 297,232 | $10.8M | 0.2% | 1.1% | -26.8% |
| 17 | NORTHERN TRUST CORP | 255,849 | $9.3M | 0.0% | 0.9% | +7.6% |
| 18 | MARSHALL WACE, LLP | 249,182 | $9.0M | 0.0% | 0.9% | +201.2% |
| 19 | Panoramic Capital, LLC | 208,192 | $7.5M | 3.2% | 0.8% | +12.5% |
| 20 | VANGUARD PORTFOLIO MANAGEMENT LLC | 194,591 | $7.0M | 0.0% | 0.7% | +28.2% |
| 21 | JPMORGAN CHASE & CO | 191,635 | $7.0M | 0.0% | 0.7% | +12.8% |
| 22 | D. E. Shaw & Co., Inc.NEW | 188,452 | $6.8M | 0.0% | 0.7% | new |
| 23 | JANE STREET GROUP, LLC | 185,697 | $6.7M | 0.0% | 0.7% | +94.6% |
| 24 | Lumbard & Kellner, LLC | 175,909 | $6.4M | 1.9% | 0.6% | 0.0% |
| 25 | CANNELL CAPITAL LLC | 170,747 | $6.2M | 4.1% | 0.6% | -50.1% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.