Eton Pharmaceuticals Ownership | Who Owns Eton Pharmaceuticals?

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Eton Pharmaceuticals Ownership Summary

Eton Pharmaceuticals is owned by 33.14% institutional investors, 4.48% insiders, and 62.38% retail investors. Opaleye management is the largest institutional shareholder, holding 10.63% of ETON shares. Vanguard Total Stock Mkt Idx Inv is the top mutual fund, with 2.56% of its assets in Eton Pharmaceuticals shares.

ETON Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Eton Pharmaceuticals	33.14%	4.48%	62.38%
Sector	Healthcare Stocks	232.51%	10.72%	-143.23%
Industry	Biotech Stocks	384.56%	10.58%	-295.14%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Opaleye management	2.86M	10.63%	$62.15M
Ecor1 capital	2.03M	7.55%	$44.12M
Blackrock funding, inc. /de	1.74M	6.47%	$29.40M
Vanguard group	1.35M	5.01%	$22.81M
Nantahala capital management	1.18M	4.37%	$19.89M
Geode capital management	565.05K	2.10%	$9.56M
Morgan stanley	493.91K	1.84%	$8.35M
Royal bank of canada	479.19K	1.78%	$10.41M
Westside investment management	470.94K	1.75%	$7.96M
Cannell capital	455.40K	1.69%	$9.90M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Opaleye management	2.86M	8.79%	$62.15M
Ecor1 capital	2.03M	2.12%	$44.12M
Cannell capital	455.40K	1.51%	$9.90M
Westside investment management	470.94K	1.27%	$7.96M
Lumbard & kellner	174.94K	1.04%	$2.96M
Diametric capital, lp	99.31K	0.80%	$2.16M
Nantahala capital management	1.18M	0.66%	$19.89M
Apis capital advisors	117.60K	0.56%	$2.56M
Aristides capital	161.44K	0.48%	$2.73M
Divisadero street capital management, lp	298.00K	0.28%	$6.48M

Top Buyers

Holder	Shares	% Assets	Change
Royal bank of canada	479.19K	0.00%	474.13K
Oberweis asset management inc/	192.36K	0.16%	192.36K
Millennium management	138.89K	0.00%	138.89K
State street	438.44K	0.00%	115.25K
Susquehanna group, llp	192.33K	0.00%	72.98K

Top Sellers

Holder	Shares	% Assets	Change
Parkman healthcare partners	-	-	-276.89K
Wasatch advisors lp	-	-	-231.33K
Paradigm capital management inc/ny	-	-	-200.00K
Soleus capital management	-	-	-200.00K
Divisadero street capital management, lp	298.00K	0.28%	-199.72K

New Positions

Holder	Shares	% Assets	Change	Value
Oberweis asset management inc/	192.36K	0.16%	192.36K	$4.18M
Millennium management	138.89K	0.00%	138.89K	$1.85M
Sheets smith investment management	14.84K	0.21%	14.84K	$322.52K
Los angeles capital management	14.63K	0.00%	14.63K	$267.02K
Voleon capital management lp	10.95K	0.01%	10.95K	$237.94K

Sold Out

Holder	Change
Lindbrook capital	-4.00
Srs capital advisors	-6.00
Cwm	-31.00
Comerica bank	-219.00
Federated hermes	-686.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	62	-40.38%	8,912,362	-49.64%	33	0.77%	30	-45.45%	22	-18.52%
Sep 30, 2025	98	18.07%	17,454,599	9.66%	64	1.85%	51	-12.07%	27	58.82%
Jun 30, 2025	86	-1.15%	16,537,107	35.73%	61	2.99%	61	15.09%	17	-26.09%
Mar 31, 2025	89	20.27%	14,123,114	7.52%	52	2.04%	53	1.92%	24	71.43%
Dec 31, 2024	24	-52.94%	3,267,082	-65.64%	12	0.94%	14	-46.15%	6	-

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard Total Stock Mkt Idx Inv	686.28K	2.56%	-15.23K
Vanguard US Total Market Shares ETF	681.72K	2.54%	-
iShares Russell 2000 ETF	625.31K	2.33%	-
Vanguard Institutional Extnd Mkt Idx Tr	275.36K	1.03%	-119.33K
Fidelity Small Cap Index	256.87K	0.96%	256.87K
iShares Russell 2000 Growth ETF	222.68K	0.83%	-
Paradigm Micro-Cap	200.00K	0.77%	-
Fidelity Extended Market Index	137.49K	0.51%	-1.13K
Vanguard Russell 2000 ETF	122.35K	0.46%	-8.18K
Wasatch Micro Cap Value	105.10K	0.40%	-

Recent Insider Transactions

Date	Name	Role	Activity	Value
Aug 20, 2025	Gruber James R.	Chief Financial Officer	Sell	$42.15K
Aug 19, 2025	Gruber James R.	Chief Financial Officer	Sell	$631.57K
Jun 12, 2025	Krempa David	Chief Business Officer	Sell	$253.30K
Jun 13, 2025	Krempa David	Chief Business Officer	Sell	$100.44K
Jun 16, 2025	Krempa David	Chief Business Officer	Sell	$150.58K

Insider Transactions Trends

Date	Buy	Sell
2026 Q1	-	-
2025 Q4	-	-
2025 Q3	-	2
2025 Q2	2	8
2025 Q1	-	-

ETON Ownership FAQ

Who Owns Eton Pharmaceuticals?

Eton Pharmaceuticals shareholders are primarily institutional investors at 33.14%, followed by 4.48% insiders and 62.38% retail investors. The average institutional ownership in Eton Pharmaceuticals's industry, Biotech Stocks , is 384.56%, which Eton Pharmaceuticals falls below.

Who owns the most shares of Eton Pharmaceuticals?

Eton Pharmaceuticals’s largest shareholders are Opaleye management (2.86M shares, 10.63%), Ecor1 capital (2.03M shares, 7.55%), and Blackrock funding, inc. /de (1.74M shares, 6.47%). Together, they hold 24.65% of Eton Pharmaceuticals’s total shares outstanding.

Does Blackrock own Eton Pharmaceuticals?

BlackRock is not among the top 10 institutional shareholders of Eton Pharmaceuticals.

Who is Eton Pharmaceuticals’s biggest shareholder by percentage of total assets invested?

Opaleye management is Eton Pharmaceuticals’s biggest shareholder by percentage of total assets invested, with 8.79% of its assets in 2.86M Eton Pharmaceuticals shares, valued at 62.15M$.

Who is the top mutual fund holder of Eton Pharmaceuticals shares?

Vanguard Total Stock Mkt Idx Inv is the top mutual fund holder of Eton Pharmaceuticals shares, with 2.56% of its total shares outstanding invested in 686.28K Eton Pharmaceuticals shares.

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