HolderBook

NET POWER INC (NPWR)

Institutional ownership reported to the SEC as of Q2 2026, across 13 quarters.

115
Reporting holders
$64.5M
Reported value
4.9%
Held as options
+7
Holder change

Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.

Holders

FilerValueShares Their book Held Change
Share Andrew L.$16.3M9,767,5008.43%13qHELD
PEAK6 LLC$5.7M1,985,7540.01%7qHELD
HITE Hedge Asset Management LLC$4.8M2,852,6700.26%13q+3.2%+$149.0K
ADAGE CAPITAL PARTNERS GP, L.L.C.$4.7M2,840,0000.01%13q+84.4%+$2.2M
BlackRock, Inc.$4.0M2,416,2940.00%8q+12.8%+$456.5K
VANGUARD CAPITAL MANAGEMENT LLC$3.0M1,802,3720.00%2q+9.6%+$264.8K
Defiance ETFs, LLC$2.6M1,555,8370.04%2q+191.8%+$1.7M
Tidal Investments LLC$2.6M1,546,5620.00%4q+190.0%+$1.7M
Sourcerock Group LLC$2.3M1,400,1100.12%3q-6.9%-$173.7K
GEODE CAPITAL MANAGEMENT, LLC$1.7M1,006,0140.00%12q+16.9%+$243.3K
Argentarii, LLC$1.2M746,7990.36%7qHELD
TWO SIGMA INVESTMENTS, LP$1.1M660,5700.00%7q-38.9%-$700.9K
STATE STREET CORP$1.0M624,2380.00%12q+1.7%+$17.9K
UBS Group AG$1.0M610,9610.00%12q+65.2%+$402.6K
SUSQUEHANNA INTERNATIONAL GROUP, LLP$817.5K261,0270.00%7q+52.3%+$280.6K
D. E. Shaw & Co., Inc.$688.9K412,5020.00%5q+75.2%+$295.8K
TUDOR INVESTMENT CORP ET AL$663.9K397,5150.00%3q-7.8%-$56.2K
AQR CAPITAL MANAGEMENT LLC$643.4K385,2830.00%5q+151.0%+$387.1K
RENAISSANCE TECHNOLOGIES LLC$591.5K354,2060.00%3q-49.7%-$583.8K
NORTHERN TRUST CORP$559.1K334,8140.00%12q+14.7%+$71.5K
VANGUARD PORTFOLIO MANAGEMENT LLC$542.1K324,6110.00%2q+22.6%+$100.1K
Nuveen, LLC$482.4K288,8760.00%6q-59.5%-$709.6K
CHARLES SCHWAB INVESTMENT MANAGEMENT INC$481.4K288,2760.00%12q+7.0%+$31.3K
Sixth Street Partners Management Company, L.P.$481.4K288,2760.00%newNEW
VANGUARD FIDUCIARY TRUST CO$471.7K282,4410.00%2q+13.4%+$55.8K
MORGAN STANLEY$452.1K270,7360.00%13q+47.3%+$145.2K
BOOTHBAY FUND MANAGEMENT, LLC$439.7K263,2980.01%3q-11.0%-$54.5K
FEDERATED HERMES, INC.$414.5K248,2080.00%5q+2.7%+$11.0K
SHELTON CAPITAL MANAGEMENT$334.5K200,3000.01%12qHELD
DIMENSIONAL FUND ADVISORS LP$272.9K163,4430.00%8q+58.5%+$100.7K
GOLDMAN SACHS GROUP INC$252.8K151,3650.00%11q-41.9%-$182.4K
CITADEL ADVISORS LLC$252.7Koptions only0.00%11qOPTIONS
SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC$236.9K141,8820.00%2q-22.9%-$70.5K
Caption Management, LLC$204.5K122,4520.00%6q+516.0%+$171.3K
ALLIANCEBERNSTEIN L.P.$183.6K117,6800.00%5q+15.7%+$25.0K
SIR Capital Management, L.P.$183.1K109,6510.02%9q+6.3%+$10.8K
LOS ANGELES CAPITAL MANAGEMENT LLC$161.0K96,4300.00%newNEW
MOORE CAPITAL MANAGEMENT, LP$141.9K85,0000.00%7qHELD
Bank of New York Mellon Corp$140.0K83,8210.00%9qHELD
SIMPLEX TRADING, LLC$129.6K77,6040.00%newNEW
XTX Topco Ltd$123.5K73,9440.00%7q+511.6%+$103.3K
JANE STREET GROUP, LLC$122.7Koptions only0.00%11qOPTIONS
LPL Financial LLC$95.3K57,0740.00%12q+7.6%+$6.8K
DEUTSCHE BANK AG\$93.6K56,0640.00%9q+3.5%+$3.2K
Qube Research & Technologies Ltd$93.2K55,8250.00%2q+52.6%+$32.1K
RHUMBLINE ADVISERS$90.0K53,9190.00%9q+9.8%+$8.0K
IMC-Chicago, LLC$69.2K41,4490.00%newNEW
OSAIC HOLDINGS, INC.$68.1K40,7850.00%13qHELD
MILLENNIUM MANAGEMENT LLC$63.2K37,8440.00%10q-94.5%-$1.1M
WELLS FARGO & COMPANY/MN$59.1K35,3830.00%13q-38.6%-$37.2K
Jain Global LLC$58.1K34,8190.00%newNEW
Russell Investments Group, Ltd.$55.9K33,5030.00%6q+1091.4%+$51.3K
MERCER GLOBAL ADVISORS INC /ADV$53.6K32,0940.00%newNEW
SIG BROKERAGE, LP$53.3K31,9420.00%5qHELD
CANADA PENSION PLAN INVESTMENT BOARD$49.6K29,7000.00%newNEW
LMR Partners LLP$48.1K28,7940.00%3q-19.7%-$11.8K
Quadrature Capital Ltd$45.0K26,9340.00%newNEW
BANK OF AMERICA CORP /DE/$45.0K26,9300.00%13q-23.2%-$13.6K
TWO SIGMA SECURITIES, LLC$36.8K22,0600.00%newNEW
Invesco Ltd.$36.8K22,0430.00%5q+95.3%+$18.0K
CAPTRUST FINANCIAL ADVISORS$33.1K19,8460.00%3q+37.6%+$9.1K
CITIGROUP INC$32.8K19,6520.00%10q+1139.1%+$30.2K
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.$32.5K19,4540.00%8q+28.7%+$7.2K
Polymer Capital Management (US) LLC$31.3K18,7310.00%3q-63.2%-$53.8K
GROUP ONE TRADING LLC$31.2K18,6720.00%5q+26.4%+$6.5K
Mariner, LLC$31.0K18,5520.00%newNEW
JPMORGAN CHASE & CO$30.4K18,2110.00%12q+7.7%+$2.2K
INTEGRITY ALLIANCE, LLC.$29.1K17,4000.00%3qHELD
Kapstone Financial Advisors LLC$29.1K17,3950.01%7qHELD
Legacy Advisors, LLC$27.4K16,4130.00%4qHELD
Engineers Gate Manager LP$27.2K16,2610.00%8q-47.5%-$24.5K
IEQ CAPITAL, LLC$27.1K16,2070.00%newNEW
Point72 Asset Management, L.P.$25.6K15,3400.00%3q-55.0%-$31.3K
SEI INVESTMENTS CO$21.5K12,8540.00%6qHELD
WEALTH ENHANCEMENT ADVISORY SERVICES, LLC$21.1K13,5280.00%newNEW
ROYAL BANK OF CANADA$21.0K12,8310.00%13q+187.2%+$13.7K
Creative Planning$20.4K12,2170.00%newNEW
Private Advisor Group, LLC$20.4K12,2000.00%2qHELD
Vanguard Global Advisers, LLC$20.3K12,1720.00%2qHELD
Aigen Investment Management, LP$19.7K11,8120.01%newNEW
Focus Partners Wealth$18.1K10,8630.00%newNEW
INTECH INVESTMENT MANAGEMENT LLC$18.0K10,7860.00%7qHELD
TRUIST FINANCIAL CORP$16.7K10,0000.00%13qHELD
BARCLAYS PLC$14.9K8,9480.00%11q+1.2%
Arax Advisory Partners$14.9K8,9430.00%2q+7290.9%+$14.7K
Integrated Wealth Concepts LLC$12.3K7,3720.00%newNEW
Tower Research Capital LLC (TRC)$12.2K7,3320.00%11q-31.0%-$5.5K
LANARK FINANCIAL, INC.$10.6K6,3400.00%12qHELD
NEW YORK STATE COMMON RETIREMENT FUND$8.5K5,1000.00%9qHELD
FIFTH THIRD BANCORP$8.3K5,0000.00%13qHELD
Police & Firemen's Retirement System of New Jersey$7.1K4,2520.00%7qHELD
Legal & General Group Plc$5.2K3,0950.00%9qHELD
Quarry LP$3.8K2,2570.00%newNEW
Ameritas Investment Partners, Inc.$3.5K2,0720.00%9qHELD
FMR LLC$3.3K1,9510.00%9q-4.5%
JONES FINANCIAL COMPANIES LLLP$3.0K1,8000.00%8q-41.5%-$2.1K
EverSource Wealth Advisors, LLC$2.8K1,6920.00%6q+82.3%+$1.3K
Allworth Financial LP$2.6K1,5450.00%4q+375.4%+$2.0K
Blue Trust, Inc.$2.3K1,3900.00%5qHELD
McMillan Office, Inc.$1.7K1,0000.00%3qHELD

Five percent filings

Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →

FiledFormFiler % of class
2026-08-1713D/A8 RIVERS CAPITAL, LLCwith 3 co-filers17.9%

Quarter by quarter

Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.

QuarterHoldersValue SharesNewAdded TrimmedOptions
Q2 2026115$64.5M36,731,5751845274.9%
Q1 2026108$54.4M34,012,9251237292.3%
Q4 2025109$77.6M33,623,2532522381.2%
Q3 202592$105.9M31,514,27013292810.4%
Q2 202588$80.4M28,998,64517342110.9%
Q1 202597$80.0M29,666,4772235222.5%
Q4 2024101$337.0M30,260,2822336184.9%
Q3 202482$206.5M29,396,7781429180.2%
Q2 202485$281.9M28,549,0362923170.4%
Q1 202468$296.2M25,955,5371717180.2%
Q4 202364$329.9M32,629,7932319110.1%
Q3 202352$473.0M31,326,7072112100.0%
Q2 202337$131.9M10,149,59336000.0%