Latest Period
Q1 2026
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
Institutions Reporting
113
Shares (Excl. Options)
35,213,040
Price
$1.56
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- Security type / class
- Equity / Class A Common Stock, par value $0.0001
- Symbol
- NPWR on NYSE
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 35,213,040
- Total 13F value
- $55,005,370
- Portfolio coverage rank
- 0%
- Share change
- +1,697,774
- Value change
- +$2,088,910
- Number of holders
- 113
- Underlying class
- Class A Common Stock
- Shares outstanding
- 106,127,590
- SEC-reported price per share
- $2.05
- Insider filing price
- $2.05
Latest holder snapshot
5 signals
Security identity
1 source field
Issuer context
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- NPWR - NET Power Inc. - Class A Common Stock, par value $0.0001 is tracked under CUSIP 64107A105.
- 113 institutions reported positions in Q1 2026.
- 2 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 115 to 113 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $76,075,977 to $55,005,370.
Research use
- 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.
Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 113 institutions filings for Q1 2026.
Security key
64107A105
Latest holder period
Q1 2026
13F holders
113
13D/G owners
2
CIK / CUSIP context first
Open Q1 2026 holders
NPWR full holder history
NET Power Inc. SEC filings
NET Power Inc. company facts
NET Power Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 64107A105:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
2
Security
NPWR
| 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 | 20% | -7.2% | $32,284,013 | -$2,012,057 | 20,694,880 | -5.9% | 8 RIVERS CAPITAL, LLC | 12 May 2026 |
As of 31 Mar 2026, 113 institutional investors reported holding 35,213,040 shares of NET Power Inc. - Class A Common Stock, par value $0.0001 (NPWR). This represents 33% of the company’s total 106,127,590 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
30%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| Share Andrew L. | 9.2% | 9,767,500 | 0% | 7.1% | $15,237,300 |
| HITE Hedge Asset Management LLC | 2.6% | 2,763,424 | +269% | 0.24% | $4,310,941 |
| BlackRock, Inc. | 2% | 2,142,916 | +7.4% | 0% | $3,342,949 |
| PEAK6 LLC | 1.9% | 1,988,215 | +48% | 0.09% | $3,101,615 |
| VANGUARD CAPITAL MANAGEMENT LLC | 1.5% | 1,643,795 | 0% | 0% | $2,564,320 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 1.5% | 1,540,000 | 0% | 0% | $2,402,400 |
| Sourcerock Group LLC | 1.4% | 1,504,126 | +0.51% | 0.1% | $2,346,437 |
| TWO SIGMA INVESTMENTS, LP | 1% | 1,080,281 | +48% | 0% | $1,685,238 |
| COHEN & STEERS, INC. | 0.84% | 892,140 | -5.6% | 0% | $1,392,000 |
| GEODE CAPITAL MANAGEMENT, LLC | 0.81% | 860,386 | +3.5% | 0% | $1,342,569 |
| Argentarii, LLC | 0.71% | 748,649 | +184% | 0.41% | $1,167,892 |
| Nuveen, LLC | 0.67% | 713,760 | +1.6% | 0% | $1,113,465 |
| RENAISSANCE TECHNOLOGIES LLC | 0.66% | 703,800 | +644% | 0% | $1,097,928 |
| MILLENNIUM MANAGEMENT LLC | 0.64% | 682,705 | -70% | 0% | $1,065,020 |
| STATE STREET CORP | 0.58% | 613,534 | +1.6% | 0% | $957,113 |
| Defiance ETFs, LLC | 0.5% | 533,253 | 0.01% | $831,875 | |
| Tidal Investments LLC | 0.5% | 533,253 | +128% | 0% | $831,875 |
| CenterBook Partners LP | 0.41% | 437,771 | -76% | 0.04% | $682,923 |
| TUDOR INVESTMENT CORP ET AL | 0.41% | 431,153 | +408% | 0% | $672,599 |
| UBS Group AG | 0.35% | 369,873 | +473% | 0% | $577,002 |
| BOOTHBAY FUND MANAGEMENT, LLC | 0.28% | 295,951 | -1.5% | 0.01% | $461,684 |
| NORTHERN TRUST CORP | 0.28% | 292,024 | +15% | 0% | $455,558 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.25% | 269,518 | +0.55% | 0% | $420,448 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 0.25% | 264,699 | 0% | 0% | $412,930 |
| GOLDMAN SACHS GROUP INC | 0.25% | 260,565 | -14% | 0% | $406,481 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
12
Latest
Q1 2026
Rows shown
1-12 of 12
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 35,213,040 | $55,005,370 | +$2,088,910 | $1.56 | 113 |
| 2025 Q4 | 33,366,053 | $76,075,977 | +$1,810,054 | $2.28 | 115 |
| 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 |