Security Snapshot

NET Power Inc. - Class A Common Stock, par value $0.0001 (NPWR) Institutional Ownership

CUSIP: 64107A105

13F Institutional Holders and Ownership History from Q2 2023 to Q1 2026

Latest Period

Q4 2025

Institutions Reporting

114

Shares (Excl. Options)

33,365,998

Price

$2.28

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Type / Class
Equity / Class A Common Stock, par value $0.0001
Symbol
NPWR on NYSE
Underlying class
Class A Common Stock
Shares outstanding
104,639,029
Price per share
$1.56
All holders as of 31 Dec 2025
Q4 2025
Total 13F shares
33,365,998
Total reported value
$76,075,852
% of total 13F portfolios
0%
Share change
+1,039,467
Value change
+$1,809,929
Number of holders
114
Price from insider filings
$1.56
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Quick Takeaways

  • NPWR - NET Power Inc. - Class A Common Stock, par value $0.0001 is tracked under CUSIP 64107A105.
  • 114 institutions reported positions in Q4 2025.
  • 2 significant owners is listed from Schedule 13D/13G reporting.

What Changed

  • Holder count moved from 114 to 20 between Q4 2025 and Q1 2026.
  • Reported value moved from $76,075,852 to $16,681,294.

Why This Matters

  • You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
  • 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.

Source Evidence

Source: SEC Form 13F

Latest holder context comes from 114 institutions filings for Q4 2025.

Open SEC Evidence

Investment Quick Answers

What is CUSIP 64107A105?
CUSIP 64107A105 identifies NPWR - NET Power Inc. - Class A Common Stock, par value $0.0001 in SEC 13F datasets.

Where can I see the latest institutional holders?
Review the Q4 2025 holders report and the ownership history table below.

Significant Owners of NET Power Inc. - Class A Common Stock, par value $0.0001 (NPWR) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
SK INC. 26% 0% $88,475,903 26,729,880 0% 8 RIVERS CAPITAL, LLC 30 Jul 2025
8 Rivers Capital, LLC 21% -5.6% $50,125,025 -$2,953,102 21,984,660 -5.6% 8 RIVERS CAPITAL, LLC 26 Jan 2026

As of 31 Dec 2025, 114 institutional investors reported holding 33,365,998 shares of NET Power Inc. - Class A Common Stock, par value $0.0001 (NPWR). This represents 32% of the company’s total 104,639,029 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of NET Power Inc. - Class A Common Stock, par value $0.0001 (NPWR) together control 29% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
Share Andrew L. 9.3% 9,767,500 -1.7% 11% $22,269,900
MILLENNIUM MANAGEMENT LLC 2.2% 2,276,592 -3.7% 0% $5,190,630
VANGUARD GROUP INC 1.9% 2,017,263 +13% 0% $4,599,360
BlackRock, Inc. 1.9% 1,995,226 -2.6% 0% $4,549,115
CenterBook Partners LP 1.8% 1,848,073 +48% 0.21% $4,213,606
ADAGE CAPITAL PARTNERS GP, L.L.C. 1.5% 1,540,000 -39% 0.01% $3,511,200
Sourcerock Group LLC 1.4% 1,496,482 0.2% $3,411,979
PEAK6 LLC 1.3% 1,347,039 0.08% $3,071,249
COHEN & STEERS, INC. 0.9% 944,587 -0.64% 0% $2,154,000
GEODE CAPITAL MANAGEMENT, LLC 0.79% 831,547 -4.9% 0% $1,896,235
HITE Hedge Asset Management LLC 0.72% 749,091 -23% 0.11% $1,707,927
TWO SIGMA INVESTMENTS, LP 0.7% 728,459 -11% 0% $1,660,887
JANE STREET GROUP, LLC 0.69% 720,560 +168% 0% $1,642,877
Nuveen, LLC 0.67% 702,391 0% 0% $1,601,451
STATE STREET CORP 0.58% 603,694 +1.5% 0% $1,376,422
Empowered Funds, LLC 0.43% 444,734 +99% 0.02% $1,013,994
MORGAN STANLEY 0.29% 303,697 -68% 0% $692,428
GOLDMAN SACHS GROUP INC 0.29% 303,662 +9.1% 0% $692,349
BOOTHBAY FUND MANAGEMENT, LLC 0.29% 300,545 0.02% $685,243
WELLINGTON MANAGEMENT GROUP LLP 0.26% 274,327 -47% 0% $625,465
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.26% 268,044 -0.09% 0% $611,140
Argentarii, LLC 0.25% 263,507 +413% 0.2% $600,796
NORTHERN TRUST CORP 0.24% 254,014 -0.74% 0% $579,152
SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.23% 241,899 -43% 0% $551,530
Point72 Asset Management, L.P. 0.23% 240,972 0% $549,416

Institutional Holders of NET Power Inc. - Class A Common Stock, par value $0.0001 (NPWR) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2026 Q1 10,693,447 $16,681,294 +$19,440 $1.56 20
2025 Q4 33,365,998 $76,075,852 +$1,809,929 $2.28 114
2025 Q3 32,472,478 $97,731,144 +$7,235,549 $3.01 100
2025 Q2 30,187,661 $74,563,817 -$2,557,401 $2.47 94
2025 Q1 30,912,137 $81,298,302 -$45,619,453 $2.63 105
2024 Q4 31,700,909 $335,682,088 +$23,253,219 $10.59 110
2024 Q3 30,684,984 $215,102,989 +$2,065,397 $7.01 88
2024 Q2 29,745,406 $292,378,736 +$23,316,521 $9.83 92
2024 Q1 27,000,033 $307,528,361 -$60,844,752 $11.39 75
2023 Q4 33,427,800 $337,621,017 +$7,264,962 $10.10 69
2023 Q3 32,213,098 $486,417,736 +$210,002,806 $15.10 57
2023 Q2 18,323,204 $238,202,002 +$237,758,780 $13.00 41
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