ETON · Eton Pharmaceuticals, Inc. · Shareholders & Ownership

$50.72 -0.23 (-0.45%) Play latest call Q2 2026 earnings call transcript

Russell 2000 member Rebalance outlook locked

Market Cap

$1.46B

28.58M

Volume · Nov 4 375.17K Avg daily vol (3M) 561.49K

Every disclosed holder of ETON in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns ETON

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	189	20,170,388	70.57%	Yes
Insiders (Forms 3, 4, 5)	7	1,539,416	5.39%	Yes
13D/G-only blocks	0	0	0.00%	Yes
Remaining	—	6,873,331	24.05%	Rest
Registered funds (N-PORT, not summed)	143	5,142,984	17.99%	No

Shares outstanding: 28,583,135, the issuer's latest cover-page count restated onto today's split basis.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of ETON

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	Opaleye Management Inc. Insider CIK 1595855 · Jul 14, 2026 Insider, issuer-wide, not summed	2,705,000	9.46%	-28,315	Jul 14, 2026	Insider, issuer-wide, not summed
1.1	Opaleye Management Inc. 13F CIK 1595855 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,860,000	10.01%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
2	EcoR1 Capital, LLC 13F CIK 1587114 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,171,938	7.60%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
3	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	1,895,833	6.63%	+178,547	Jun 30, 2026	carried, not yet filed for the newest quarter
3.1	BlackRock, Inc. 13G CIK 2012383 · Holding company · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	1,882,410	6.59%	+352,053	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
3.2	iShares Russell 2000 ETF Fund S000004344 · Registered fund · Jun 30, 2026 iShares Trust, not summed	694,013	2.43%	+66,359	Jun 30, 2026	iShares Trust, not summed
3.3	iShares Russell 2000 Growth ETF Fund S000004343 · Registered fund · Jun 30, 2026 iShares Trust, not summed	246,453	0.86%	+38,496	Jun 30, 2026	iShares Trust, not summed
3.4	iShares Micro-Cap ETF Fund S000004439 · Registered fund · Jun 30, 2026 iShares Trust, not summed	89,743	0.31%	+25,122	Jun 30, 2026	iShares Trust, not summed
3.5	Master Small Cap Index Series Fund S000002716 · Registered fund · Jun 30, 2026 Quantitative Master Series LLC, not summed	49,912	0.17%	+10,499	Jun 30, 2026	Quantitative Master Series LLC, not summed
4	Nantahala Capital Management, LLC 13F CIK 1472322 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,175,951	4.11%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
5	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	976,570	3.42%	-17,519	Jun 30, 2026	carried, not yet filed for the newest quarter
6	BRYNJELSEN SEAN Insider CIK 1669976 · Aug 20, 2026 Director, President & CEO, 10% Owner, issuer-wide	961,194	3.36%	-100,000	Aug 20, 2026	Director, President & CEO, 10% Owner, issuer-wide
7	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	767,972	2.69%	+290,015	Jun 30, 2026	carried, not yet filed for the newest quarter
8	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	701,786	2.46%	+171,571	Jun 30, 2026	carried, not yet filed for the newest quarter
8.1	State Street(R) SPDR(R) S&P(R) Pharmaceuticals ETF Fund S000012321 · Registered fund · Jun 30, 2026 SPDR SERIES TRUST, not summed	154,434	0.54%	—	Jun 30, 2026	SPDR SERIES TRUST, not summed
8.2	STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO Fund S000050332 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	8,800	0.03%	0	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
8.3	State Street Total Return V.I.S. Fund Fund S000001637 · Registered fund · Jun 30, 2026 STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed	696	0.00%	+87	Jun 30, 2026	STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
8.4	State Street Balanced Index Fund Fund S000082802 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	133	0.00%	0	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
9	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	684,821	2.40%	-30,203	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
10	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	652,303	2.28%	+74,637	Jun 30, 2026	carried, not yet filed for the newest quarter
11	OBERWEIS ASSET MANAGEMENT INC/ 13F CIK 937886 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	501,600	1.75%	+62,300	Jun 30, 2026	carried, not yet filed for the newest quarter
11.1	Oberweis Micro-Cap Fund Fund S000010231 · Registered fund · Jun 30, 2026 OBERWEIS FUNDS, not summed	483,900	1.69%	+63,000	Jun 30, 2026	OBERWEIS FUNDS, not summed
12	National Philanthropic Trust 13F CIK 1785342 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	492,112	1.72%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
13	Westside Investment Management, Inc. 13F CIK 1538383 · Registered investment adviser · Sep 30, 2026	401,385	1.40%	-29,775	Sep 30, 2026
14	Pillsbury Lake Capital LLC 13F CIK 2111915 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	387,157	1.35%	+22,203	Jun 30, 2026	carried, not yet filed for the newest quarter
15	Nuveen, LLC 13F CIK 1871926 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	375,707	1.31%	+317,757	Jun 30, 2026	carried, not yet filed for the newest quarter
15.1	Nuveen Quant Small Cap Equity Fund Fund S000005386 · Registered fund · Jul 31, 2026 TIAA-CREF Funds, not summed	253,380	0.89%	—	Jul 31, 2026	TIAA-CREF Funds, not summed
15.2	College Retirement Equities Fund - Total Global Stock Account Fund S000005080 · Registered fund · Jun 30, 2026 College Retirement Equities Fund, not summed	47,120	0.16%	—	Jun 30, 2026	College Retirement Equities Fund, not summed
15.3	Nuveen Small Cap Blend Index Fund Fund S000005367 · Registered fund · Jul 31, 2026 TIAA-CREF Funds, not summed	35,429	0.12%	+4,451	Jul 31, 2026	TIAA-CREF Funds, not summed
15.4	Nuveen Equity Index Fund Fund S000005360 · Registered fund · Jul 31, 2026 TIAA-CREF Funds, not summed	25,692	0.09%	0	Jul 31, 2026	TIAA-CREF Funds, not summed
15.5	Nuveen Life Small Cap Equity Fund Fund S000005093 · Registered fund · Jun 30, 2026 TIAA-CREF Life Funds, not summed	5,269	0.02%	—	Jun 30, 2026	TIAA-CREF Life Funds, not summed
16	BNP PARIBAS ARBITRAGE, SA 13F CIK 1166588 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	322,466	1.13%	+20,358	Jun 30, 2026	carried, not yet filed for the newest quarter
17	Woodline Partners LP 13F CIK 1784547 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	310,879	1.09%	+140,180	Jun 30, 2026	carried, not yet filed for the newest quarter
18	THOMPSON SIEGEL & WALMSLEY LLC 13F CIK 1008322 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	297,232	1.04%	-108,857	Jun 30, 2026	carried, not yet filed for the newest quarter
19	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	271,079	0.95%	+12,916	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
20	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	255,849	0.90%	+18,017	Jun 30, 2026	carried, not yet filed for the newest quarter
20.1	Small Cap Index Fund Fund S000001245 · Registered fund · Jun 30, 2026 Northern Funds, not summed	13,473	0.05%	+1,637	Jun 30, 2026	Northern Funds, not summed
20.2	Small Cap Core Fund Fund S000001244 · Registered fund · Jun 30, 2026 Northern Funds, not summed	6,491	0.02%	-261	Jun 30, 2026	Northern Funds, not summed
21	MARSHALL WACE, LLP 13F CIK 1318757 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	249,182	0.87%	+166,461	Jun 30, 2026	carried, not yet filed for the newest quarter
22	RIEDEL NORBERT G Insider CIK 1161662 · Apr 21, 2026 Director, issuer-wide	224,300	0.78%	+32,155	Apr 21, 2026	Director, issuer-wide
23	Gruber James R. Insider CIK 1923165 · Jan 14, 2026 Chief Financial Officer, issuer-wide	213,420	0.75%	-2,293	Jan 14, 2026	Chief Financial Officer, issuer-wide
24	Panoramic Capital, LLC 13F CIK 1950490 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	208,192	0.73%	+23,192	Jun 30, 2026	carried, not yet filed for the newest quarter
25	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	194,591	0.68%	+42,843	Jun 30, 2026	carried, not yet filed for the newest quarter
26	JPMORGAN CHASE & CO 13F CIK 19617 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	191,635	0.67%	+21,759	Jun 30, 2026	carried, not yet filed for the newest quarter
27	D. E. Shaw & Co., Inc. 13F CIK 1009207 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	188,452	0.66%	+188,452	Jun 30, 2026	carried, not yet filed for the newest quarter
28	JANE STREET GROUP, LLC 13F CIK 1595888 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	185,697	0.65%	+90,277	Jun 30, 2026	carried, not yet filed for the newest quarter
29	Lumbard & Kellner, LLC 13F CIK 1602476 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	175,909	0.62%	-2	Jun 30, 2026	carried, not yet filed for the newest quarter
30	CANNELL CAPITAL LLC 13F CIK 1058854 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	170,747	0.60%	-171,238	Jun 30, 2026	carried, not yet filed for the newest quarter
31	NORGES BANK 13F CIK 1374170 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	169,500	0.59%	—	Jun 30, 2026	carried, not yet filed for the newest quarter
32	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	168,539	0.59%	+3,824	Jun 30, 2026	carried, not yet filed for the newest quarter
33	Informed Momentum Co LLC 13F CIK 1510989 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	158,045	0.55%	+109,422	Jun 30, 2026	carried, not yet filed for the newest quarter
34	WASATCH ADVISORS LP 13F CIK 814133 · Registered investment adviser · Sep 30, 2026	157,802	0.55%	+65,060	Sep 30, 2026
34.1	Wasatch Micro Cap Fund Fund S000000885 · Registered fund · Sep 30, 2026 WASATCH FUNDS TRUST, not summed	156,414	0.55%	+64,490	Sep 30, 2026	WASATCH FUNDS TRUST, not summed
35	Prospect Capital Advisors, LLC 13F CIK 1632368 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	157,200	0.55%	+157,200	Jun 30, 2026	carried, not yet filed for the newest quarter
36	VANGUARD RUSSELL 2000 INDEX FUND Fund S000030003 · Registered fund · Aug 31, 2026 VANGUARD SCOTTSDALE FUNDS, not summed	152,894	0.53%	+21,260	Aug 31, 2026	VANGUARD SCOTTSDALE FUNDS, not summed
37	Aristides Capital LLC 13F CIK 1595521 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	145,410	0.51%	-40,631	Jun 30, 2026	carried, not yet filed for the newest quarter
38	BANK OF AMERICA CORP /DE/ 13F CIK 70858 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	142,257	0.50%	-2,110	Jun 30, 2026	carried, not yet filed for the newest quarter
39	PRELUDE CAPITAL MANAGEMENT, LLC 13F CIK 1387508 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	137,572	0.48%	-51,230	Jun 30, 2026	carried, not yet filed for the newest quarter
40	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	132,583	0.46%	-84,863	Jun 30, 2026	carried, not yet filed for the newest quarter
40.1	Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF Fund S000048296 · Registered fund · Aug 31, 2026 Goldman Sachs ETF Trust, not summed	37,337	0.13%	+10,129	Aug 31, 2026	Goldman Sachs ETF Trust, not summed
40.2	Goldman Sachs Absolute Return Tracker Fund Fund S000020314 · Registered fund · Aug 31, 2026 GOLDMAN SACHS TRUST, not summed	17,779	0.06%	+10,571	Aug 31, 2026	GOLDMAN SACHS TRUST, not summed
41	Bank of New York Mellon Corp 13F CIK 1390777 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	118,249	0.41%	+6,994	Jun 30, 2026	carried, not yet filed for the newest quarter
42	TWO SIGMA INVESTMENTS, LP 13F CIK 1179392 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	116,291	0.41%	+9,898	Jun 30, 2026	carried, not yet filed for the newest quarter
43	WELLS FARGO & COMPANY/MN 13F CIK 72971 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	114,655	0.40%	+105,096	Jun 30, 2026	carried, not yet filed for the newest quarter
44	Bridge City Capital, LLC 13F CIK 1713521 · Registered investment adviser · Sep 30, 2026	86,767	0.30%	-1,365	Sep 30, 2026
45	Walleye Capital LLC 13F CIK 1758720 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	86,249	0.30%	+4,286	Jun 30, 2026	carried, not yet filed for the newest quarter
46	CHARLES SCHWAB INVESTMENT MANAGEMENT INC 13F CIK 884546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	77,032	0.27%	+8,237	Jun 30, 2026	carried, not yet filed for the newest quarter
46.1	Schwab Small-Cap Index Fund Fund S000005912 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	64,689	0.23%	+9,165	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
46.2	Schwab Total Stock Market Index Fund Fund S000005913 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	13,239	0.05%	0	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
47	WELLINGTON MANAGEMENT GROUP LLP 13F CIK 902219 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	76,103	0.27%	+5,979	Jun 30, 2026	carried, not yet filed for the newest quarter
48	Diametric Capital, LP 13F CIK 1719087 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	73,101	0.26%	-83,825	Jun 30, 2026	carried, not yet filed for the newest quarter
49	MAIER PAUL V Insider CIK 1182615 · Aug 28, 2026 Director, issuer-wide	72,245	0.25%	—	Aug 28, 2026	Director, issuer-wide
50	Numerai GP LLC 13F CIK 1668527 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	70,114	0.25%	+32,758	Jun 30, 2026	carried, not yet filed for the newest quarter

7 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 261 holders

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Key facts CIK 1710340 CUSIP 29772L108 13F (30d) 59 filings 59 filers Visit website Investor relations