Eton PharmaceuticalsETON
13F holders, Q1 2026 (March 31)116holders +12
26new positions
15sold out
3famous investors
$24.66avg. 13F price*
At the end of Q1 2026, 116 institutions reported holding Eton Pharmaceuticals Inc. (ETON) in their 13F filings, up 12 from Q4 2025. 26 opened new positions and 15 sold out. The largest holders were Opaleye Management Inc. ($70.6M), EcoR1 Capital, LLC ($53.6M) and BlackRock, Inc. ($42.4M). 3 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), Ken Griffin (0.0% of Citadel Advisors's portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Eton Pharmaceuticals Inc.
- CUSIP
- 29772L108
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 26 | $31.3M |
| Exits | 15 | $5.0M |
All 13F filers, Q4 2025 → Q1 2026: 2,099,057 shares bought and 673,881 shares sold, net +1,425,176 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 116 holders
| Opaleye Management Inc. | 9.30% | No change | 2,860,000 | $70.6M |
| EcoR1 Capital, LLC | 2.29% | Add +7.0% | 2,171,938 | $53.6M |
| BlackRock, Inc. | 0.00% | Reduce -1.2% | 1,717,286 | $42.4M |
| Nantahala Capital Management, LLC | 1.82% | No change | 1,175,951 | $29.0M |
| Vanguard Capital Management LLC | 0.00% | — | 994,089 | $24.5M |
| Geode Capital Management, LLC | 0.00% | Add +2.2% | 577,666 | $14.3M |
| State Street Corp. | 0.00% | Add +5.6% | 530,215 | $13.1M |
| National Philanthropic Trust | 0.13% | No change | 492,112 | $12.1M |
| Morgan Stanley | 0.00% | Reduce -3.2% | 477,957 | $11.8M |
| Westside Investment Management, Inc. | 1.77% | Reduce -0.6% | 467,915 | $11.5M |
| Oberweis Asset Management Inc./ | 0.32% | Add +1.9% | 439,300 | $10.8M |
| Thompson Siegel & Walmsley LLC | 0.18% | Reduce -0.6% | 406,089 | $10.0M |
| Pillsbury Lake Capital LLC | 4.08% | New | 364,954 | $9.0M |
| Cannell Capital LLC | 5.48% | Add +57.7% | 341,985 | $8.4M |
| BNP Paribas Financial Markets | 0.01% | Add +8.9% | 302,108 | $7.5M |
| Northern Trust Corp. | 0.00% | Add +2.6% | 237,832 | $5.9M |
| Goldman Sachs Group Inc. | 0.00% | Add +10.8% | 217,446 | $5.4M |
| Prelude Capital Management, LLC | 0.36% | Add +316.6% | 188,802 | $4.7M |
| Aristides Capital LLC | 1.52% | Add +15.2% | 186,041 | $4.6M |
| Panoramic Capital, LLC | 3.21% | New | 185,000 | $4.6M |
| Lumbard & Kellner, LLC | 1.50% | Add +0.6% | 175,911 | $4.3M |
| Woodline Partners LP | 0.02% | Add +78.8% | 170,699 | $4.2M |
| UBS Group AG | 0.00% | Add +33.4% | 168,958 | $4.2M |
| Soleus Capital Management, L.P. | 0.17% | New | 166,381 | $4.1M |
| Vanguard Fiduciary Trust Co. | 0.00% | — | 164,715 | $4.1M |
| Renaissance Technologies | 0.01% | Reduce -20.6% | 163,321 | $4.0M |
| Diametric Capital, LP | 1.02% | Reduce -18.8% | 156,926 | $3.9M |
| JPMorgan Chase & Co. | 0.00% | Reduce -8.4% | 169,876 | $3.8M |
| Vanguard Portfolio Management LLC | 0.00% | — | 151,748 | $3.7M |
| Bank of America Corp. | 0.00% | Add +37.8% | 144,367 | $3.6M |
| Bank of New York Mellon Corp | 0.00% | Reduce -12.9% | 111,255 | $2.7M |
| Citadel Advisors | 0.00% | Add +45.4% | 107,815 | $2.7M |
| Two Sigma Investments, LP | 0.00% | Add +38.9% | 106,393 | $2.6M |
| Jane Street Group, LLC | 0.00% | Add +64.4% | 95,420 | $2.4M |
| Marshall Wace, LLP | 0.00% | New | 82,721 | $2.0M |
| Walleye Capital LLC | 0.01% | New | 81,963 | $2.0M |
| Wellington Management Group LLP | 0.00% | Reduce -13.6% | 70,124 | $1.7M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -10.9% | 68,795 | $1.7M |
| Sei Investments Co. | 0.00% | New | 58,034 | $1.4M |
| Nuveen, LLC | 0.00% | Reduce -1.6% | 57,950 | $1.4M |
| Boothbay Fund Management, LLC | 0.03% | New | 55,605 | $1.4M |
| XTX Topco Ltd | 0.02% | Add +59.2% | 51,772 | $1.3M |
| Barclays PLC | 0.00% | Reduce -4.0% | 49,374 | $1.2M |
| Informed Momentum Co LLC | 0.14% | New | 48,623 | $1.2M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | Reduce -44.3% | 42,693 | $1.1M |
| Anchor Capital Advisors LLC | 0.03% | Add +0.5% | 40,858 | $1.0M |
| Manatuck Hill Partners, LLC | 0.32% | New | 40,000 | $987K |
| Numerai GP LLC | 0.09% | New | 37,356 | $922K |
| Susquehanna International Group, LLP | 0.00% | New | 34,084 | $841K |
| Blair William & Co. | 0.00% | No change | 32,400 | $800K |
| Rhumbline Advisers | 0.00% | Add +0.9% | 30,726 | $758K |
| Polen Capital Management LLC | 0.01% | New | 30,138 | $744K |
| Guilbault Capital LLC | 0.63% | No change | 23,225 | $573K |
| Invesco Ltd. | 0.00% | Add +16.2% | 22,874 | $565K |
| Brevan Howard Capital Management LP | 0.01% | New | 22,506 | $555K |
| Bridge City Capital, LLC | 0.14% | Add +13.7% | 21,150 | $522K |
| Deutsche Bank AG | 0.00% | Add +15.8% | 21,136 | $522K |
| Essex Investment Management Co. LLC | 0.08% | No change | 20,182 | $498K |
| Juncture Wealth Strategies, LLC | 0.16% | Add +1.0% | 19,181 | $473K |
| State of Wisconsin Investment Board | 0.00% | Reduce -24.3% | 18,644 | $460K |
| HighTower Advisors, LLC | 0.00% | New | 18,423 | $455K |
| T. Rowe Price Associates Inc. | 0.00% | Add +14.8% | 17,652 | $436K |
| CHICAGO TRUST Co NA | 0.07% | No change | 16,700 | $412K |
| MetLife Investment Management, LLC | 0.00% | No change | 15,537 | $383K |
| Millennium Management | 0.00% | Reduce -81.2% | 14,939 | $369K |
| PDT Partners, LLC | 0.02% | No change | 14,891 | $368K |
| Bank of Nova Scotia | 0.00% | New | 15,000 | $365K |
| Voleon Capital Management LP | 0.01% | Reduce -14.7% | 13,290 | $328K |
| Raymond James Financial Inc. | 0.00% | No change | 12,250 | $302K |
| Aquatic Capital Management LLC | 0.01% | Reduce -47.1% | 12,061 | $298K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +1.5% | 12,038 | $297K |
| American Century Companies Inc. | 0.00% | New | 11,926 | $294K |
| Quantum Private Wealth, LLC | 0.09% | No change | 11,500 | $284K |
| Envestnet Asset Management Inc. | 0.00% | Reduce -1.9% | 10,739 | $265K |
| Los Angeles Capital Management LLC | 0.00% | Reduce -29.8% | 10,269 | $253K |
| Wells Fargo & Company | 0.00% | Reduce -66.2% | 9,559 | $236K |
| State of Wyoming | 0.03% | Add +16.4% | 9,498 | $234K |
| Vanguard Global Advisers, LLC | 0.00% | — | 8,991 | $222K |
| Granite Investment Partners, LLC | 0.01% | New | 8,479 | $209K |
| Jain Global LLC | 0.00% | New | 8,287 | $205K |
| New York State Common Retirement Fund | 0.00% | No change | 8,100 | $200K |
| Quantbot Technologies LP | 0.01% | Reduce -16.8% | 7,787 | $192K |
| Northwestern Mutual Wealth Management Co. | 0.00% | Reduce -25.0% | 7,500 | $185K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | No change | 7,209 | $178K |
| State of Alaska, Department of Revenue | 0.00% | No change | 6,943 | $171K |
| China Universal Asset Management Co., Ltd. | 0.01% | Add +8.9% | 4,759 | $117K |
| Russell Investments Group, Ltd. | 0.00% | Reduce -94.6% | 2,670 | $66K |
| Citigroup Inc. | 0.00% | Add +75.6% | 2,548 | $63K |
| Legal & General Group Plc | 0.00% | Reduce -14.7% | 2,330 | $57K |
| Ameritas Investment Partners, Inc. | 0.00% | No change | 2,167 | $53K |
| FMR LLC | 0.00% | Reduce -50.6% | 1,519 | $37K |
| Mirae Asset Global Investments Co., Ltd. | 0.00% | Add +7.4% | 1,399 | $35K |
| California State Teachers Retirement System | 0.00% | Reduce -12.0% | 1,388 | $34K |
| Truvestments Capital LLC | 0.01% | No change | 1,183 | $29K |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -61.4% | 1,156 | $29K |
| GF Fund Management Co. LTD. | 0.00% | Add +13.3% | 597 | $15K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | New | 368 | $9K |
| Jones Financial Companies LLLP | 0.00% | Add +58.4% | 350 | $8K |
| Parallel Advisors, LLC | 0.00% | New | 303 | $7K |
| SBI Securities Co., Ltd. | 0.00% | Add +2530.0% | 263 | $6K |
"% of holder's portfolio" is ETON's weight in each manager's 13F, not the share of Eton Pharmaceuticals Inc. the manager owns.