Eos Energy Enterprises, Inc.: which funds bought and sold

Institutions that bought and sold Eos Energy Enterprises 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, 207 institutions that filed 13F reports for both quarters added to or opened positions in Eos Energy Enterprises, and 144 cut or closed them. Together they added a net 21.1M shares, +10.3% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 8.4M shares (+12.3%); index fund managers were net buyers of 7.8M shares (+11.9%). 74 opened a new position and 42 sold out entirely.

Bought, Q2 2026 207 institutions, 74 of them new holders Sold, Q2 2026 144 institutions, 42 of them sold out

Net change, all compared +21.1M shares (+10.3%)

Net change, active managers +8.4M shares (+12.3%), 31 bought, 22 sold

Buyers versus sellers

institutions compared, 385

207 bought 34 144 sold

Active managers and hedge funds 31 bought · 22 sold · +8.4M

Index fund managers 11 bought · 0 sold · +7.8M

Other institutions 165 bought · 122 sold · +5.0M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Hudson Bay Capital Management LP Hedge fund	+13.7M New position	13.7M	$80.5M
Graham Capital Management, L.P. Hedge fund	+3.6M New position	3.6M	$21M
Susquehanna International Group, LLP	+3.3M +52.5%	9.7M	$56.9M
Blackrock, Inc. Index funds	+3.0M +12.6%	27.1M	$160M
Legal & General Group PLC	+2.9M +272.9%	3.9M	$22.9M
Morgan Stanley	+2.4M +79.5%	5.3M	$31.2M
State Street Corp Index funds	+2.1M +26.7%	10.2M	$59.7M
UBS Group AG	+2.0M +106.0%	3.9M	$23M
Exoduspoint Capital Management, LP Hedge fund	+2.0M New position	2.0M	$11.8M
Cable Car Capital, LP Hedge fund	+2.0M New position	2.0M	$11.8M
Mirae Asset Global Etfs Holdings Ltd.	+1.7M +194.1%	2.5M	$15.2M
Alyeska Investment Group, L.P. Hedge fund	+1.4M +194.3%	2.0M	$12M
Electron Capital Partners, LLC Hedge fund	+1.3M +24.2%	6.7M	$39.3M
Ursa Fund Management, LLC	+1.2M New position	1.2M	$7.3M
BNP Paribas Asset Management Holding S.A.	+1.2M +88.0%	2.6M	$15.1M
Masters Capital Management LLC Hedge fund	+1.2M New position	1.2M	$7.1M
Quarry LP	+1.2M New position	1.2M	$6.9M
Boothbay Fund Management, LLC Hedge fund	+1.1M +1016.3%	1.2M	$7.2M
Geode Capital Management, LLC Index funds	+1.1M +13.8%	8.9M	$52.3M
Wellington Management Group LLP Active manager	+955K +475.8%	1.2M	$6.8M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Hudson Bay Capital Management LP Hedge fund	+13.7M New position	13.7M	$80.5M
Graham Capital Management, L.P. Hedge fund	+3.6M New position	3.6M	$21M
Exoduspoint Capital Management, LP Hedge fund	+2.0M New position	2.0M	$11.8M
Cable Car Capital, LP Hedge fund	+2.0M New position	2.0M	$11.8M
Alyeska Investment Group, L.P. Hedge fund	+1.4M +194.3%	2.0M	$12M
Electron Capital Partners, LLC Hedge fund	+1.3M +24.2%	6.7M	$39.3M
Masters Capital Management LLC Hedge fund	+1.2M New position	1.2M	$7.1M
Boothbay Fund Management, LLC Hedge fund	+1.1M +1016.3%	1.2M	$7.2M
Wellington Management Group LLP Active manager	+955K +475.8%	1.2M	$6.8M
Capital Fund Management S.A. Hedge fund	+747K +52.1%	2.2M	$12.8M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Marshall Wace, LLP Hedge fund	−6.2M −94.3%	374K	$2.2M
HRT Financial LP	−5.2M Sold out	0	—
Voloridge Investment Management, LLC Hedge fund	−3.4M Sold out	0	—
Citadel Advisors LLC Hedge fund	−2.8M −45.7%	3.3M	$19.5M
Marex Group Ltd	−2.0M −73.6%	729K	$4.3M
Group One Trading LLC	−1.9M −64.7%	1.1M	$6.2M
Goldman Sachs Group Inc	−1.9M −69.4%	834K	$4.9M
Renaissance Technologies LLC Hedge fund	−1.8M Sold out	0	—
Millennium Management LLC Hedge fund	−1.7M −57.8%	1.3M	$7.4M
Qube Research & Technologies Ltd Hedge fund	−1.6M Sold out	0	—
Tudor Investment Corp Et Al Hedge fund	−1.5M −71.2%	623K	$3.7M
Driehaus Capital Management LLC Active manager	−1.3M −8.8%	13.6M	$79.7M
Two Sigma Investments, LP Hedge fund	−1.3M −9.2%	12.8M	$75.2M
BNP Paribas Financial Markets	−1.0M −92.1%	88K	$517,487
First Trust Advisors LP	−601K −39.1%	937K	$5.5M
Price T Rowe Associates Inc Active manager	−562K −54.4%	472K	$2.8M
Arosa Capital Management LP	−526K −72.5%	200K	$1.2M
Newedge Advisors, LLC	−436K −43.8%	558K	$3.3M
Imc-Chicago, LLC	−388K −46.9%	441K	$2.6M
Algert Global LLC Hedge fund	−373K −56.5%	287K	$1.7M

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Marshall Wace, LLP Hedge fund	−6.2M −94.3%	374K	$2.2M
Voloridge Investment Management, LLC Hedge fund	−3.4M Sold out	0	—
Citadel Advisors LLC Hedge fund	−2.8M −45.7%	3.3M	$19.5M
Renaissance Technologies LLC Hedge fund	−1.8M Sold out	0	—
Millennium Management LLC Hedge fund	−1.7M −57.8%	1.3M	$7.4M
Qube Research & Technologies Ltd Hedge fund	−1.6M Sold out	0	—
Tudor Investment Corp Et Al Hedge fund	−1.5M −71.2%	623K	$3.7M
Driehaus Capital Management LLC Active manager	−1.3M −8.8%	13.6M	$79.7M
Two Sigma Investments, LP Hedge fund	−1.3M −9.2%	12.8M	$75.2M
Price T Rowe Associates Inc Active manager	−562K −54.4%	472K	$2.8M

New positions

largest by value

Institution	Shares	Value June 30, 2026
Hudson Bay Capital Management LPHedge fund	13.7M	$80.5M
Graham Capital Management, L.P.Hedge fund	3.6M	$21M
Exoduspoint Capital Management, LPHedge fund	2.0M	$11.8M
Cable Car Capital, LPHedge fund	2.0M	$11.8M
Ursa Fund Management, LLC	1.2M	$7.3M
Masters Capital Management LLCHedge fund	1.2M	$7.1M
Quarry LP	1.2M	$6.9M
Trexquant Investment LPHedge fund	695K	$4.1M
Bridgewater Associates, LPHedge fund	633K	$3.7M
Alpine Global Management, LLC	500K	$2.9M

Sold out

largest by value

Institution	Shares	Value March 31, 2026
HRT Financial LP	5.2M	$25.8M
Voloridge Investment Management, LLCHedge fund	3.4M	$17.1M
Renaissance Technologies LLCHedge fund	1.8M	$9.2M
Qube Research & Technologies LtdHedge fund	1.6M	$8M
Shariaportfolio, Inc.	205K	$1M
Sei Investments Co	81K	$401,190
Jane Street Group, LLC	73K	$360,900
Peak6 LLC	62K	$309,985
Florida Financial Advisors, LLC	61K	$302,161
Macroview Investment Management LLC	46K	$228,438

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 346
Ten largest holders: 53.9%
Index fund managers: 32.1%
Active managers and hedge funds: 33.5%

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	31	22	15	7	+8.4M	+12.3%
Index fund managers	11	0	0	0	+7.8M	+11.9%
Other institutions	165	122	59	35	+5.0M	+6.9%

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 Eos Energy Enterprises.

Only managers that filed a holdings report for both quarters are compared (385 here). 8 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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