Net Power Inc.
NPWR- Exchange
- NYSE
- Industry
- Electrical Industrial Apparatus
- SEC CIK
- 0001845437
In the last 90 days, Net Power Inc. insiders filed 0 open-market purchases and 7 sales; 120 institutions reported holding it in 13F filings for Q2 2026, worth $64.1M in total; no superinvestor holds it.
Other share classesNPWR.WT
13F holders, Q4 2025
Institutional positions in Net Power Inc. as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 114
- +18 vs. Q3 2025
- Shares held
- 33.4M
- +1.04M (+3.2%) vs. Q3 2025
- Total value
- $76.1M
- −$21.2M (−21.8%) vs. Q3 2025
- New holders
- 28
- 25 more added
- Sold out
- 10
- 39 more reduced
4 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting NPWR on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 120 | $64.1M |
| Q1 2026 | 113 | $55.0M |
| Q4 2025 | 114 | $76.1M |
| Q3 2025 | 100 | $97.7M |
| Q2 2025 | 94 | $74.6M |
| Q1 2025 | 108 | $81.4M |
| Q4 2024 | 113 | $335.8M |
| Q3 2024 | 89 | $215.2M |
| Q2 2024 | 93 | $292.4M |
| Q1 2024 | 77 | $307.6M |
| Q4 2023 | 70 | $337.7M |
| Q3 2023 | 58 | $486.7M |
| Q2 2023 | 42 | $238.5M |
| Q1 2023 | 0 | $0 |
| Q4 2022 | 0 | $0 |
| Q3 2022 | 0 | $0 |
| Q2 2022 | 0 | $0 |
| Q1 2022 | 0 | $0 |
| Q4 2021 | 0 | $0 |
| Q3 2021 | 0 | $0 |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q4 2025
Shares, value and share of portfolio for each institution holding Net Power Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Nuveen, LLC | 702,391 | $1.60M | 0.00% | 00.0% | Unchanged |
| Jane Street Group, LLC | 720,560 | $1.64M | 0.00% | +451,765+168.1% | Added |
| Two Sigma Investments, LP | 728,459 | $1.66M | 0.00% | −93,334−11.4% | Reduced |
| HITE Hedge Asset Management LLC | 749,091 | $1.71M | 0.11% | −227,337−23.3% | Reduced |
| Geode Capital Management, LLC | 831,547 | $1.90M | 0.00% | −42,972−4.9% | Reduced |
| Cohen & Steers, Inc. | 944,587 | $2.15M | 0.00% | −6,124−0.6% | Reduced |
| PEAK6 LLC | 1,347,039 | $3.07M | 0.08% | +1,347,039 | New |
| Sourcerock Group LLC | 1,496,482 | $3.41M | 0.20% | +1,496,482 | New |
| Adage Capital Partners GP, L.L.C. | 1,540,000 | $3.51M | 0.01% | −969,868−38.6% | Reduced |
| CenterBook Partners LP | 1,848,073 | $4.21M | 0.21% | +599,725+48.0% | Added |
| BlackRock, Inc. | 1,995,226 | $4.55M | 0.00% | −52,554−2.6% | Reduced |
| Vanguard Group Inc | 2,017,263 | $4.60M | 0.00% | +231,669+13.0% | Added |
| Millennium Management LLC | 2,276,592 | $5.19M | 0.00% | −88,654−3.7% | Reduced |
| Share Andrew L. | 9,767,500 | $22.3M | 11.25% | −170,000−1.7% | Reduced |
| Walleye Capital LLC | 0 | $0 | 0.00% | −284,932−100.0% | Sold out |
| Ardsley Advisory Partners LP | 0 | $0 | 0.00% | −107,817−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −105,663−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −98,700−100.0% | Sold out |
| Citadel Advisors LLC | 0 | $0 | 0.00% | −73,044−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −47,571−100.0% | Sold out |
| SG Americas Securities, LLC | 0 | $0 | 0.00% | −34,911−100.0% | Sold out |
| Sanctuary Advisors, LLC | 0 | $0 | 0.00% | −10,735−100.0% | Sold out |
| Rockefeller Capital Management L.P. | 0 | $0 | 0.00% | −110−100.0% | Sold out |
| Versant Capital Management, Inc | 0 | $0 | 0.00% | −103−100.0% | Sold out |
| G.F.W. Energy XII, L.P. | – | – | – | – | Not filed |
| Stonegate Investment Group, LLC | – | – | – | – | Not filed |
| West Oak Capital, LLC | – | – | – | – | Not filed |
| Promus Capital, LLC | – | – | – | – | Not filed |