Net Power Inc.: which funds bought and sold

Institutions that bought and sold Net Power 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, 68 institutions that filed 13F reports for both quarters added to or opened positions in Net Power, and 39 cut or closed them. Together they added a net 3.2M shares, +9.2% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 435K shares (−6.7%); index fund managers were net buyers of 748K shares (+11.7%). 20 opened a new position and 9 sold out entirely.

Bought, Q2 2026 68 institutions, 20 of them new holders Sold, Q2 2026 39 institutions, 9 of them sold out

Net change, all compared +3.2M shares (+9.2%)

Net change, active managers −435K shares (−6.7%), 9 bought, 12 sold

Buyers versus sellers

institutions compared, 130

68 bought 23 39 sold

Active managers and hedge funds 9 bought · 12 sold · −435K

Index fund managers 9 bought · 0 sold · +748K

Other institutions 50 bought · 27 sold · +2.9M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Adage Capital Partners Gp, L.L.C. Hedge fund	+1.3M +84.4%	2.8M	$4.7M
Defiance Etfs, LLC	+1.0M +191.8%	1.6M	$2.6M
Tidal Investments LLC	+1.0M +190.0%	1.5M	$2.6M
Gsa Capital Partners LLP	+665K +357.1%	851K	$1.4M
Blackrock, Inc. Index funds	+273K +12.8%	2.4M	$4M
UBS Group AG	+241K +65.2%	611K	$1M
AQR Capital Management LLC Hedge fund	+232K +151.0%	385K	$643,422
D. E. Shaw & Co., Inc. Hedge fund	+177K +75.2%	413K	$688,878
Vanguard Capital Management LLC Index funds	+159K +9.6%	1.8M	$3M
Geode Capital Management, LLC Index funds	+146K +16.9%	1.0M	$1.7M
Caption Management, LLC	+103K +516.0%	122K	$204,495
Los Angeles Capital Management LLC Active manager	+96K New position	96K	$161,038
Susquehanna International Group, LLP	+90K +52.3%	261K	$435,915
Hite Hedge Asset Management LLC	+89K +3.2%	2.9M	$4.8M
Morgan Stanley	+87K +47.3%	271K	$452,128
Simplex Trading, LLC	+78K New position	78K	$129,598
Xtx Topco Ltd	+62K +511.6%	74K	$123,486
HRT Financial LP	+61K New position	61K	$101,000
Dimensional Fund Advisors LP	+60K +58.5%	163K	$272,950
Vanguard Portfolio Management LLC Index funds	+60K +22.6%	325K	$542,100

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Adage Capital Partners Gp, L.L.C. Hedge fund	+1.3M +84.4%	2.8M	$4.7M
AQR Capital Management LLC Hedge fund	+232K +151.0%	385K	$643,422
D. E. Shaw & Co., Inc. Hedge fund	+177K +75.2%	413K	$688,878
Los Angeles Capital Management LLC Active manager	+96K New position	96K	$161,038
Jain Global LLC Hedge fund	+35K New position	35K	$58,148
Quadrature Capital Ltd Hedge fund	+27K New position	27K	$44,980
Qube Research & Technologies Ltd Hedge fund	+19K +52.6%	56K	$93,228
Alliancebernstein L.P. Active manager	+16K +15.7%	118K	$183,581
Federated Hermes, Inc. Active manager	+6,616 +2.7%	248K	$414,507

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Millennium Management LLC Hedge fund	−645K −94.5%	38K	$63,199
Centerbook Partners LP Hedge fund	−438K Sold out	0	—
Nuveen, LLC	−425K −59.5%	289K	$482,423
Two Sigma Investments, LP Hedge fund	−420K −38.9%	661K	$1.1M
Renaissance Technologies LLC Hedge fund	−350K −49.7%	354K	$591,524
Citadel Advisors LLC Hedge fund	−219K Sold out	0	—
Squarepoint Ops LLC Hedge fund	−166K Sold out	0	—
Empowered Funds, LLC	−155K Sold out	0	—
Goldman Sachs Group Inc	−109K −41.9%	151K	$252,780
Sourcerock Group LLC	−104K −6.9%	1.4M	$2.3M
Jane Street Group, LLC	−53K Sold out	0	—
Susquehanna Fundamental Investments, LLC	−42K −22.9%	142K	$236,943
Tudor Investment Corp Et Al Hedge fund	−34K −7.8%	398K	$663,850
Boothbay Fund Management, LLC Hedge fund	−33K −11.0%	263K	$439,708
Polymer Capital Management (US) LLC	−32K −63.2%	19K	$31,281
Family Manage LLC	−26K Sold out	0	—
Summit Securities Group LLC	−19K Sold out	0	—
Point72 Asset Management, L.P. Hedge fund	−19K −55.0%	15K	$25,618
Engineers Gate Manager LP Hedge fund	−15K −47.5%	16K	$27,156
Manufacturers Life Insurance Company, The	−12K Sold out	0	—

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Millennium Management LLC Hedge fund	−645K −94.5%	38K	$63,199
Centerbook Partners LP Hedge fund	−438K Sold out	0	—
Two Sigma Investments, LP Hedge fund	−420K −38.9%	661K	$1.1M
Renaissance Technologies LLC Hedge fund	−350K −49.7%	354K	$591,524
Citadel Advisors LLC Hedge fund	−219K Sold out	0	—
Squarepoint Ops LLC Hedge fund	−166K Sold out	0	—
Tudor Investment Corp Et Al Hedge fund	−34K −7.8%	398K	$663,850
Boothbay Fund Management, LLC Hedge fund	−33K −11.0%	263K	$439,708
Point72 Asset Management, L.P. Hedge fund	−19K −55.0%	15K	$25,618
Engineers Gate Manager LP Hedge fund	−15K −47.5%	16K	$27,156

New positions

largest by value

Institution	Shares	Value June 30, 2026
Los Angeles Capital Management LLCActive manager	96K	$161,038
Simplex Trading, LLC	78K	$129,598
HRT Financial LP	61K	$101,000
Imc-Chicago, LLC	41K	$69,220
Jain Global LLCHedge fund	35K	$58,148
Canada Pension Plan Investment Board	30K	$49,599
Quadrature Capital LtdHedge fund	27K	$44,980
Virtu Financial LLC	26K	$43,000
Cambridge Investment Research Advisors, Inc.	23K	$38,000
Two Sigma Securities, LLC	22K	$36,840

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Centerbook Partners LPHedge fund	438K	$682,923
Citadel Advisors LLCHedge fund	219K	$341,610
Squarepoint Ops LLCHedge fund	166K	$259,338
Empowered Funds, LLC	155K	$241,800
Jane Street Group, LLC	53K	$81,975
Family Manage LLC	26K	$40,923
Summit Securities Group LLC	19K	$30,050
Manufacturers Life Insurance Company, The	12K	$19,417
Mai Capital Management	21	$33

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 121
Ten largest holders: 70.7%
Index fund managers: 18.6%
Active managers and hedge funds: 15.9%

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	9	12	3	3	−435K	−6.7%
Index fund managers	9	0	0	0	+748K	+11.7%
Other institutions	50	27	17	6	+2.9M	+13.2%

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 Net Power.

Only managers that filed a holdings report for both quarters are compared (130 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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