Eton Pharmaceuticals, Inc.: which funds bought and sold

Institutions that bought and sold Eton Pharmaceuticals shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 111 institutions that filed 13F reports for both quarters added to or opened positions in Eton Pharmaceuticals, and 40 cut or closed them. Together they added a net 3.2M shares, +17.9% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 1.7M shares (+34.4%); index fund managers were net buyers of 483K shares (+10.8%). 54 opened a new position and 5 sold out entirely.

Bought, Q2 2026 111 institutions, 54 of them new holders Sold, Q2 2026 40 institutions, 5 of them sold out

Net change, all compared +3.2M shares (+17.9%)

Net change, active managers +1.7M shares (+34.4%), 23 bought, 8 sold

Buyers versus sellers

institutions compared, 167

111 bought 16 40 sold

Active managers and hedge funds 23 bought · 8 sold · +1.7M

Index fund managers 8 bought · 1 sold · +483K

Other institutions 80 bought · 31 sold · +990K

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Nantahala Capital Management, LLC Hedge fund	+1.2M +100.0%	2.4M	$85.1M
Nuveen, LLC	+318K +548.3%	376K	$13.6M
Morgan Stanley	+290K +60.7%	768K	$27.8M
D. E. Shaw & Co., Inc. Hedge fund	+188K New position	188K	$6.8M
Blackrock, Inc. Index funds	+179K +10.4%	1.9M	$68.6M
State Street Corp Index funds	+172K +32.4%	702K	$25.4M
Marshall Wace, LLP Hedge fund	+166K +201.2%	249K	$9M
Prospect Capital Advisors, LLC	+157K New position	157K	$5.7M
Woodline Partners LP Hedge fund	+140K +82.1%	311K	$11.3M
Informed Momentum Co LLC	+109K +225.0%	158K	$5.7M
Wells Fargo & Company	+105K +1099.4%	115K	$4.2M
Wasatch Advisors LP Active manager	+93K New position	93K	$3.4M
Jane Street Group, LLC	+90K +94.6%	186K	$6.7M
Geode Capital Management, LLC Index funds	+75K +12.9%	652K	$23.6M
Bridge City Capital, LLC	+67K +316.7%	88K	$3.2M
Oberweis Asset Management Inc/ Active manager	+62K +14.2%	502K	$18.2M
Squarepoint Ops LLC Hedge fund	+60K New position	60K	$2.2M
Point72 Asset Management, L.P. Hedge fund	+45K New position	45K	$1.6M
Vanguard Portfolio Management LLC Index funds	+43K +28.2%	195K	$7M
Dimensional Fund Advisors LP	+42K New position	42K	$1.5M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Nantahala Capital Management, LLC Hedge fund	+1.2M +100.0%	2.4M	$85.1M
D. E. Shaw & Co., Inc. Hedge fund	+188K New position	188K	$6.8M
Marshall Wace, LLP Hedge fund	+166K +201.2%	249K	$9M
Woodline Partners LP Hedge fund	+140K +82.1%	311K	$11.3M
Wasatch Advisors LP Active manager	+93K New position	93K	$3.4M
Oberweis Asset Management Inc/ Active manager	+62K +14.2%	502K	$18.2M
Squarepoint Ops LLC Hedge fund	+60K New position	60K	$2.2M
Point72 Asset Management, L.P. Hedge fund	+45K New position	45K	$1.6M
Alliancebernstein L.P. Active manager	+28K New position	28K	$697,210
American Century Companies Inc Active manager	+17K +144.2%	29K	$1.1M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Cannell Capital LLC	−171K −50.1%	171K	$6.2M
Soleus Capital Management, L.P. Hedge fund	−166K Sold out	0	—
Renaissance Technologies LLC Hedge fund	−111K −68.0%	52K	$1.9M
Thompson Siegel & Walmsley LLC	−109K −26.8%	297K	$10.8M
UBS Group AG	−104K −61.3%	65K	$2.4M
Goldman Sachs Group Inc	−85K −39.0%	133K	$4.8M
Diametric Capital, LP	−84K −53.4%	73K	$2.6M
Citadel Advisors LLC Hedge fund	−59K −54.6%	49K	$1.8M
Prelude Capital Management, LLC	−51K −27.1%	138K	$5M
Xtx Topco Ltd	−46K −88.5%	5,965	$215,933
Aristides Capital LLC	−41K −21.8%	145K	$5.3M
Manatuck Hill Partners, LLC	−40K Sold out	0	—
Westside Investment Management, Inc.	−37K −7.9%	431K	$15.6M
Connor, Clark & Lunn Investment Management Ltd.	−30K −69.2%	13K	$476,030
Sei Investments Co	−23K −40.2%	35K	$1.3M
Susquehanna International Group, LLP	−20K −57.4%	15K	$525,081
Vanguard Capital Management LLC Index funds	−18K −1.8%	977K	$35.4M
Millennium Management LLC Hedge fund	−15K Sold out	0	—
Brevan Howard Capital Management LP Hedge fund	−15K −64.7%	7,955	$287,971
State Of Wyoming	−6,548 −68.9%	2,950	$106,790

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Soleus Capital Management, L.P. Hedge fund	−166K Sold out	0	—
Renaissance Technologies LLC Hedge fund	−111K −68.0%	52K	$1.9M
Citadel Advisors LLC Hedge fund	−59K −54.6%	49K	$1.8M
Millennium Management LLC Hedge fund	−15K Sold out	0	—
Brevan Howard Capital Management LP Hedge fund	−15K −64.7%	7,955	$287,971
Voleon Capital Management LP Hedge fund	−6,063 −45.6%	7,227	$261,617
Quantbot Technologies LP Hedge fund	−3,237 −41.6%	4,550	$164,710
Jain Global LLC Hedge fund	−1,066 −12.9%	7,221	$261,400

New positions

largest by value

Institution	Shares	Value June 30, 2026
D. E. Shaw & Co., Inc.Hedge fund	188K	$6.8M
Prospect Capital Advisors, LLC	157K	$5.7M
Wasatch Advisors LPActive manager	93K	$3.4M
Squarepoint Ops LLCHedge fund	60K	$2.2M
Point72 Asset Management, L.P.Hedge fund	45K	$1.6M
Dimensional Fund Advisors LP	42K	$1.5M
HSBC Holdings PLC	41K	$1.5M
Jefferies Financial Group Inc.	34K	$1.2M
Y-Intercept (Hong Kong) Ltd	34K	$1.2M
Riggs Asset Managment Co. Inc.	32K	$1.2M

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Soleus Capital Management, L.P.Hedge fund	166K	$4.1M
Manatuck Hill Partners, LLC	40K	$987,200
Millennium Management LLCHedge fund	15K	$368,695
Advisory Services Network, LLC	50	$1,234
Twin Peaks Wealth Advisors, LLC	38	$938

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 163
Ten largest holders: 63.3%
Index fund managers: 23.5%
Active managers and hedge funds: 31.5%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	23	8	10	2	+1.7M	+34.4%
Index fund managers	8	1	0	0	+483K	+10.8%
Other institutions	80	31	44	3	+990K	+11.8%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Eton Pharmaceuticals.

Only managers that filed a holdings report for both quarters are compared (167 here). 3 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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