Eton Pharmaceuticals Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

NasdaqGM:ETON Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Shares	Max Price
20 Aug 25	SellUS$673,714	James Gruber	Individual	41,713	US$16.16
16 Jun 25	SellUS$504,318	David Krempa	Individual	34,000	US$14.92
10 Jun 25	BuyUS$125,484	Opaleye Management Inc.	Company	7,930	US$15.82
05 Jun 25	SellUS$3,592,611	Sean Brynjelsen	Individual	210,000	US$19.02

Insider Trading Volume

Insider Buying: Insufficient data to determine if insiders have bought more shares than they have sold in the past 3 months.

Ownership Breakdown

What is the ownership structure of ETON?
Owner Type	Number of Shares	Ownership Percentage
Individual Insiders	1,355,929	4.95%
Hedge Funds	5,031,938	18.4%
General Public	8,148,940	29.7%
Institutions	12,855,551	46.9%

Dilution of Shares: Shareholders have not been meaningfully diluted in the past year.

Top Shareholders

Top 25 shareholders own 58.23% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
10.4%	Opaleye Management Inc.	2,860,000	US$87.1m	0%	10.29%
7.93%	EcoR1 Capital, LLC	2,171,938	US$66.1m	6.96%	2.73%
6.27%	BlackRock, Inc.	1,717,286	US$52.3m	-1.24%	no data
4.29%	Nantahala Capital Management, LLC	1,175,951	US$35.8m	0%	2.19%
3.63%	Vanguard Capital Management, LLC	994,089	US$30.3m	0%	no data
3.46%	Sean Brynjelsen	948,679	US$28.9m	-67.2%	no data
2.11%	Geode Capital Management, LLC	577,666	US$17.6m	2.23%	no data
1.94%	State Street Global Advisors, Inc.	530,215	US$16.1m	5.64%	no data
1.8%	National Philanthropic Trust	492,112	US$15.0m	0%	0.14%
1.71%	Westside Investment Management, LLC	467,915	US$14.2m	-0.64%	2.09%
1.67%	Morgan Stanley	457,338	US$13.9m	-3.8%	no data
1.6%	Oberweis Asset Management, Inc.	439,300	US$13.4m	1.85%	0.28%
1.48%	Thompson, Siegel & Walmsley LLC	406,089	US$12.4m	-0.6%	0.15%
1.33%	Pillsbury Lake Capital, LLC	364,954	US$11.1m	0%	4.55%
1.25%	Cannell Capital LLC	341,985	US$10.4m	57.7%	6.52%
1.1%	BNP Paribas Financial Markets SNC	302,108	US$9.2m	8.88%	0.01%
0.87%	Northern Trust Global Investments	237,832	US$7.2m	2.58%	no data
0.82%	Norbert Riedel	224,300	US$6.8m	16.7%	no data
0.69%	Prelude Capital Management, LLC	188,802	US$5.7m	317%	0.43%
0.68%	Aristides Capital LLC	186,041	US$5.7m	15.2%	1.81%
0.68%	Panoramic Capital, Llc	185,000	US$5.6m	0%	3.03%
0.64%	Lumbard & Kellner, LLC	175,911	US$5.4m	0.55%	1.68%
0.62%	Woodline Partners LP	170,699	US$5.2m	78.8%	0.02%
0.62%	UBS Asset Management AG	169,326	US$5.2m	33.7%	no data
0.61%	Soleus Capital Management, L.P.	166,381	US$5.1m	0%	0.18%

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2026/05/31 07:49
End of Day Share Price	2026/05/29 00:00
Earnings	2026/03/31
Annual Earnings	2025/12/31

Data Sources

The data used in our company analysis is from S&P Global Market Intelligence LLC. The following data is used in our analysis model to generate this report. Data is normalised which can introduce a delay from the source being available.

Package	Data	Timeframe	Example US Source ^*
Company Financials	10 years	Income statement Cash flow statement Balance sheet	SEC Form 10-K SEC Form 10-Q
Analyst Consensus Estimates	+3 years	Forecast financials Analyst price targets	Analyst Research Reports Blue Matrix
Market Prices	30 years	Stock prices Dividends, Splits and Actions	ICE Market Data SEC Form S-1
Ownership	10 years	Top shareholders Insider trading	SEC Form 4 SEC Form 13D
Management	10 years	Leadership team Board of directors	SEC Form 10-K SEC Form DEF 14A
Key Developments	10 years	Company announcements	SEC Form 8-K

^* Example for US securities, for non-US equivalent regulatory forms and sources are used.

Unless specified all financial data is based on a yearly period but updated quarterly. This is known as Trailing Twelve Month (TTM) or Last Twelve Month (LTM) Data. Learn more.

Analysis Model and Snowflake

Details of the analysis model used to generate this report is available on our Github page, we also have guides on how to use our reports and tutorials on Youtube.

Learn about the world class team who designed and built the Simply Wall St analysis model.

Industry and Sector Metrics

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Analyst Sources

Eton Pharmaceuticals, Inc. is covered by 5 analysts. 3 of those analysts submitted the estimates of revenue or earnings used as inputs to our report. Analysts submissions are updated throughout the day.

Analyst	Institution
Mayank Mamtani	B. Riley Securities, Inc.
Madison Wynne El-Saadi	B. Riley Securities, Inc.
Chase Knickerbocker	Craig-Hallum Capital Group LLC