NPWR · Net Power Inc.

$1.70 +0.04 (+2.41%) At close · Aug 21

Market Cap

$382.26M

224.86M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Quarter:

Holders: 122

Total Value: $67,322,834

Total Shares: 40,313,638

Institutional Ownership Trend

13 quarters

Holder Concentration

Across 122 13F filers · Δ vs Mar 31, 2026

Top Holder

24.2%

−2.9 pts

Top 5

52.9%

+1.2 pts

Top 10

71.0%

+3.0 pts

HHI

894

Broadly held−91

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: +9

Institutional value: +19.9%

Shares held: +12.0%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Large ADAGE CAPITAL PARTNERS GP, L.L.C.	+1,300,000	2,840,000
Large PEAK6 LLC	+1,142,539	3,430,054
Mid Defiance ETFs, LLC	+1,022,584	1,555,837
Large Tidal Investments LLC	+1,013,309	1,546,562
Mid GSA CAPITAL PARTNERS LLP	+665,056	851,296

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Mega MILLENNIUM MANAGEMENT LLC	−644,861	37,844
Mega Nuveen, LLC	−424,884	288,876
Mega TWO SIGMA INVESTMENTS, LP	−419,711	660,570
Large RENAISSANCE TECHNOLOGIES LLC	−349,594	354,206
Mega CITADEL ADVISORS LLC	−222,281	151,300

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Large LOS ANGELES CAPITAL MANAGEMENT LLC	96,430	$161,038
Mid SIMPLEX TRADING, LLC	77,604	$129,598
Large HRT FINANCIAL LP	60,620	$101,235
Mid IMC-Chicago, LLC	41,449	$69,219
Large Jain Global LLC	34,819	$58,147

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Mid CenterBook Partners LP	437,771	$682,922
Large Squarepoint Ops LLC	166,242	$259,337
Large Empowered Funds, LLC	155,000	$241,800
Small Family Manage LLC	26,233	$40,923
Small OXFORD ASSET MANAGEMENT LLP	19,566	$30,522

Filter: New 20 Increased 49 Reduced 30 Sold out 11 Unchanged 23

Showing 100 of 127

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

Share Andrew L.

$16,311,725

24.23%

9,767,500

HITE Hedge Asset Management LLC

$4,763,958

7.08%

2,852,670

ADAGE CAPITAL PARTNERS GP, L.L.C.

$4,742,800

7.04%

2,840,000

BlackRock, Inc.

$4,035,209

5.99%

2,416,294

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BLACKROCK FINANCIAL MANAGEMENT INC/DE	11,170	$18,653	0.5%	Sole
BlackRock Investment Management, LLC	89,706	$149,809	3.7%	Sole
BLACKROCK ADVISORS LLC	105,986	$176,996	4.4%	Sole
BlackRock Fund Advisors	1,421,078	$2,373,200	58.8%	Sole
BlackRock Institutional Trust Company, N.A.	767,012	$1,280,910	31.7%	Sole
BlackRock Investment Management (UK) Ltd.	21,342	$35,641	0.9%	Sole

PEAK6 LLC

$3,316,209

4.93%

1,985,754

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
PEAK6 Investments LLC joint	1,985,754	$3,316,209	100.0%	Defined

VANGUARD CAPITAL MANAGEMENT LLC

$3,009,961

4.47%

1,802,372

Defiance ETFs, LLC

$2,598,247

3.86%

1,555,837

Tidal Investments LLC

$2,582,758

3.84%

1,546,562

PEAK6 LLC

$2,411,981

3.58%

1,444,300

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
PEAK6 Investments LLC joint	1,444,300	$2,411,981	100.0%	Defined

Sourcerock Group LLC

$2,338,183

3.47%

1,400,110

GEODE CAPITAL MANAGEMENT, LLC

$1,680,042

2.50%

1,006,014

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	150,320	$251,034	14.9%	Defined
Held directly	855,694	$1,429,008	85.1%	Defined

COHEN & STEERS, INC.

$1,484,553

2.21%

888,954

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Cohen & Steers Capital Management Inc	888,954	$1,484,553	100.0%	Sole

GSA CAPITAL PARTNERS LLP

$1,421,664

2.11%

851,296

Argentarii, LLC

$1,247,154

1.85%

746,799

TWO SIGMA INVESTMENTS, LP

$1,103,151

1.64%

660,570

STATE STREET CORP

$1,042,477

1.55%

624,238

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STATE STREET GLOBAL ADVISORS EUROPE LIMITED joint	624,238	$1,042,477	100.0%	Defined

UBS Group AG

$1,020,304

1.52%

610,961

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS Financial Services Inc	3,000	$5,010	0.5%	Defined
UBS AG	605,568	$1,011,298	99.1%	Defined
UBS Securities LLC	2,393	$3,996	0.4%	Defined

D. E. Shaw & Co., Inc.

$688,877

1.02%

412,502

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
D. E. SHAW & CO, L.P.	64,205	$107,222	15.6%	Defined
D. E. Shaw Investment Management, L.L.C. joint	348,297	$581,655	84.4%	Defined

TUDOR INVESTMENT CORP ET AL

$663,850

0.99%

397,515

AQR CAPITAL MANAGEMENT LLC

$643,420

0.96%

385,283

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RF&L WEALTH MANAGEMENT, LLC	32	$53	0.0%	Other
Prism Planning Partners LLC	786	$1,312	0.2%	Other
Compound Planning, Inc.	50	$83	0.0%	Other
Arax Advisory Partners	8,745	$14,604	2.3%	Other
HALBERT HARGROVE GLOBAL ADVISORS, LLC	2,778	$4,639	0.7%	Other
Stokes Family Office, LLC	317	$529	0.1%	Other
Held directly	372,575	$622,200	96.7%	Defined

RENAISSANCE TECHNOLOGIES LLC

$591,524

0.88%

354,206

NORTHERN TRUST CORP

$559,138

0.83%

334,814

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NORTHERN TRUST CO joint	317,113	$529,578	94.7%	Defined
NORTHERN TRUST GLOBAL INVESTMENTS LTD	11,657	$19,467	3.5%	Defined
DWS INVESTMENT MANAGEMENT AMERICAS, INC joint	6,044	$10,093	1.8%	Other

VANGUARD PORTFOLIO MANAGEMENT LLC

$542,100

0.81%

324,611

Nuveen, LLC

$482,422

0.72%

288,876

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Nuveen Asset Management, LLC joint	12,854	$21,466	4.4%	Defined
TEACHERS ADVISORS, LLC joint	276,022	$460,956	95.6%	Defined

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

$481,420

0.72%

288,276

VANGUARD FIDUCIARY TRUST CO

$471,676

0.70%

282,441

MORGAN STANLEY

$452,127

0.67%

270,736

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY & CO INTERNATIONAL PLC	175	$292	0.1%	Defined
MORGAN STANLEY & CO. LLC	11,720	$19,572	4.3%	Defined
MORGAN STANLEY CAPITAL SERVICES, LLC	139,529	$233,013	51.5%	Defined
MORGAN STANLEY SMITH BARNEY LLC	67,545	$112,800	24.9%	Defined
PARAMETRIC PORTFOLIO ASSOCIATES LLC	51,767	$86,450	19.1%	Defined

BOOTHBAY FUND MANAGEMENT, LLC

$439,707

0.65%

263,298

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$435,915

0.65%

261,027

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	261,027	$435,915	100.0%	Other

FEDERATED HERMES, INC.

$414,507

0.62%

248,208

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
FEDERATED MDTA LLC	248,208	$414,507	100.0%	Defined

SHELTON CAPITAL MANAGEMENT

$334,501

0.50%

200,300

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$289,411

0.43%

173,300

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	173,300	$289,411	100.0%	Other

DIMENSIONAL FUND ADVISORS LP

$272,949

0.41%

163,443

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Dimensional Fund Advisors Ltd.	3,630	$6,062	2.2%	Defined
Dimensional Ireland Ltd	29,559	$49,363	18.1%	Defined
Held directly	130,254	$217,524	79.7%	Sole

GOLDMAN SACHS GROUP INC

$252,778

0.38%

151,365

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GOLDMAN SACHS & CO. LLC	104,104	$173,853	68.8%	Defined
GOLDMAN SACHS ASSET MANAGEMENT, L.P.	47,261	$78,925	31.2%	Defined

SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC

$236,942

0.35%

141,882

Janney Montgomery Scott LLC

$222,110

0.33%

133,000

Caption Management, LLC

$204,494

0.30%

122,452

ALLIANCEBERNSTEIN L.P.

$196,525

0.29%

117,680

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Equitable Holdings, Inc.	117,680	$196,525	100.0%	Defined

SIR Capital Management, L.P.

$183,117

0.27%

109,651

CITADEL ADVISORS LLC

$172,177

0.26%

103,100

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	103,100	$172,177	100.0%	Defined

LOS ANGELES CAPITAL MANAGEMENT LLC

$161,038

0.24%

96,430

MOORE CAPITAL MANAGEMENT, LP

$141,950

0.21%

85,000

Bank of New York Mellon Corp

$139,979

0.21%

83,821

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Mellon Investments Corporation	23,470	$39,194	28.0%	Defined
The Bank of New York Mellon	60,350	$100,784	72.0%	Defined
Held directly	1	$1	0.0%	Defined

SIMPLEX TRADING, LLC

$129,598

0.19%

77,604

XTX Topco Ltd

$123,486

0.18%

73,944

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
XTX EXECUTION SERVICES LLC joint	73,944	$123,486	100.0%	Defined

JANE STREET GROUP, LLC

$105,711

0.16%

63,300

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	63,300	$105,711	100.0%	Defined

HRT FINANCIAL LP

$101,235

0.15%

60,620

LPL Financial LLC

$95,313

0.14%

57,074

DEUTSCHE BANK AG\

$93,626

0.14%

56,064

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
DWS Investments UK Ltd	56,064	$93,626	100.0%	Defined

Qube Research & Technologies Ltd

$93,227

0.14%

55,825

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$92,184

0.14%

55,200

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	55,200	$92,184	100.0%	Other

RHUMBLINE ADVISERS

$90,044

0.13%

53,919

CITADEL ADVISORS LLC

$80,494

0.12%

48,200

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	48,200	$80,494	100.0%	Defined

IMC-Chicago, LLC

$69,219

0.10%

41,449

OSAIC HOLDINGS, INC.

$68,110

0.10%

40,785

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
OSAIC WEALTH, INC.	14,150	$23,630	34.7%	Defined
Osaic Advisory Services, LLC	26,635	$44,480	65.3%	Defined

MILLENNIUM MANAGEMENT LLC

$63,199

0.09%

37,844

WELLS FARGO & COMPANY/MN

$59,089

0.09%

35,383

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
WELLS FARGO BANK N A	35,383	$59,089	100.0%	Defined

Jain Global LLC

$58,147

0.09%

34,819

Russell Investments Group, Ltd.

$55,949

0.08%

33,503

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Russell Investment Management, LLC	33,503	$55,949	100.0%	Defined

SIG BROKERAGE, LP

$53,343

0.08%

31,942

CANADA PENSION PLAN INVESTMENT BOARD

$49,599

0.07%

29,700

LMR Partners LLP

$48,085

0.07%

28,794

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
LMR PARTNERS (DIFC) Ltd	28,794	$48,085	100.0%	Sole

Quadrature Capital Ltd

$44,979

0.07%

26,934

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Quadrature US Inc.	26,934	$44,979	100.0%	Other

BANK OF AMERICA CORP /DE/

$44,973

0.07%

26,930

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BANK OF AMERICA NA	26,930	$44,973	100.0%	Defined

Virtu Financial LLC

$43,465

0.06%

26,027

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Virtu Americas LLC	26,027	$43,465	100.0%	Defined

TWO SIGMA SECURITIES, LLC

$36,840

0.05%

22,060

Invesco Ltd.

$36,810

0.05%

22,043

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Invesco Advisers, Inc. joint	5,548	$9,264	25.2%	Defined
Invesco Trust Co joint	16,495	$27,546	74.8%	Defined

CAPTRUST FINANCIAL ADVISORS

$33,142

0.05%

19,846

CITIGROUP INC

$32,818

0.05%

19,652

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citibank, N.A. joint	27	$45	0.1%	Defined
Citigroup Financial Products Inc. joint	19,625	$32,773	99.9%	Defined

MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.

$32,488

0.05%

19,454

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Global X Management CO LLC joint	19,454	$32,488	100.0%	Defined

Polymer Capital Management (US) LLC

$31,280

0.05%

18,731

GROUP ONE TRADING LLC

$31,182

0.05%

18,672

Mariner, LLC

$30,981

0.05%

18,552

JPMORGAN CHASE & CO

$30,411

0.05%

18,211

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
JPMorgan Chase Bank, N.A.	17,515	$29,250	96.2%	Defined
J.P. Morgan Investment Management Inc.	11	$18	0.1%	Defined
J.P. Morgan Securities plc	685	$1,143	3.8%	Defined

INTEGRITY ALLIANCE, LLC.

$29,058

0.04%

17,400

Kapstone Financial Advisors LLC

$29,049

0.04%

17,395

PRICE T ROWE ASSOCIATES INC /MD/

$28,436

0.04%

17,028

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
T. Rowe Price International Ltd	17,028	$28,436	100.0%	Defined

Legacy Advisors, LLC

$27,409

0.04%

16,413

Engineers Gate Manager LP

$27,155

0.04%

16,261

IEQ CAPITAL, LLC

$27,065

0.04%

16,207

MERCER GLOBAL ADVISORS INC /ADV

$26,798

0.04%

16,047

Point72 Asset Management, L.P.

$25,617

0.04%

15,340

WEALTH ENHANCEMENT ADVISORY SERVICES, LLC

$22,591

0.03%

13,528

SEI INVESTMENTS CO

$21,466

0.03%

12,854

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SEI TRUST CO	12,854	$21,466	100.0%	Sole

ROYAL BANK OF CANADA

$21,426

0.03%

12,831

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RBC CMA LTD.	1,382	$2,307	10.8%	Defined
RBC Dominion Securities Inc.	11,449	$19,119	89.2%	Defined

Creative Planning

$20,402

0.03%

12,217

Private Advisor Group, LLC

$20,374

0.03%

12,200

Vanguard Global Advisers, LLC

$20,327

0.03%

12,172

Aigen Investment Management, LP

$19,726

0.03%

11,812

Cambridge Investment Research Advisors, Inc.

$18,936

0.03%

11,339

Focus Partners Wealth

$18,141

0.03%

10,863

INTECH INVESTMENT MANAGEMENT LLC

$18,012

0.03%

10,786

JANE STREET GROUP, LLC

$17,034

0.03%

10,200

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	10,200	$17,034	100.0%	Defined

TRUIST FINANCIAL CORP

$16,700

0.02%

10,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
TRUIST BANK /NC/	10,000	$16,700	100.0%	Defined

BARCLAYS PLC

$14,941

0.02%

8,948

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS BANK PLC	5,755	$9,610	64.3%	Defined
BARCLAYS CAPITAL INC.	2,197	$3,668	24.5%	Defined
BARCLAYS CAPITAL SECURITIES LTD	996	$1,663	11.1%	Defined

Arax Advisory Partners

$14,934

0.02%

8,943

Integrated Wealth Concepts LLC

$12,311

0.02%

7,372

Tower Research Capital LLC (TRC)

$12,244

0.02%

7,332

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Latour Trading LLC (Latour)	7,332	$12,244	100.0%	Defined

NBC SECURITIES, INC.

$10,587

0.02%

6,340

NEW YORK STATE COMMON RETIREMENT FUND

$8,517

0.01%

5,100

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Fifth Third Bank, National Association	5,000	$8,350	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Mellon Capital	4,252	$7,100	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Legal & General Investment Management America Inc	3,095	$5,168	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
EATON VANCE MANAGEMENT	2,072	$3,460	100.0%	Other

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Fidelity Management & Research Co LLC	1,951	$3,258	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Edward D. Jones & Co., L.P.	1,800	$3,006	100.0%	Sole

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BMSS Wesson Wealth Solutions, LLC	22	$36	1.3%	Sole
Held directly	1,670	$2,787	98.7%	Sole

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Optiver VOF	4	$6	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Squarepoint Capital LLP	166,242	$259,337	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MANULIFE FINANCIAL CORP joint	12,447	$19,417	100.0%	Defined

Key facts CIK 1845437 CUSIP 64107A105 13F (30d) 111 filings 111 filers Visit website Investor relations